Dumbbell capable of adjusting weight and dumbbell assembly

Abstract

A dumbbell capable of adjusting weight includes a dumbbell rod assembly and dumbbell plates. Hitching assemblies are arranged at two ends of the dumbbell rod; a first baffle is arranged at one end of each of the two hitching assemblies; a concave inserting-connection port is formed at the top of each of the dumbbell plates; the dumbbell plates are hitched to the two hitching assemblies; the dumbbell sheets are provided with first hitching parts and second hitching parts; a second surface of one dumbbell plate close to the first baffle abuts against the first baffle, and the second hitching parts of the other dumbbell sheets are hitched to the first hitching parts of the adjacent dumbbell plate; and a bolt is inserted into a bolt through hole of the dumbbell plate farthest from the first baffle.

What is claimed is: 
     
         1 . A dumbbell comprising:
 a dumbbell rod assembly comprising a dumbbell rod and two hitching assemblies, wherein the two hitching assemblies are arranged at two ends of the dumbbell rod, each of the two hitching assemblies comprises a bridge block, each of the bridge blocks defines a plurality of bridge block through holes;   a plurality of dumbbell plates, wherein each of the plurality of dumbbell plates defines a first bolt hole, a second bolt hole, and a concave inserting-connection port between the first bolt hole and the second bolt; the concave inserting-connection port is configured to receive a corresponding one of the bridge blocks; the first bolt hole and the second bolt hole of each of the plurality of dumbbell plates and a corresponding one of the plurality of bridge block through holes form a bolt channel;   at least one bolt arranged on each of the two hitching assemblies, wherein each of the at least one bolt defines a limiting clamping port, each of the at least one bolt is configured to extend through a corresponding one of the bolt channels; and   a limiting plate movably arranged in each of the two hitching assemblies;   wherein each of the limiting plates is configured to clamp a corresponding one of the limiting clamping ports to allow the at least one bolt to be locked or released on a corresponding one of the two hitching assemblies.   
     
     
         2 . The dumbbell according to  claim 1 , wherein one end of each of the bridge blocks is fixedly connected to a first baffle, and another end of each of the bridge blocks is fixedly connected to a second baffle. 
     
     
         3 . The dumbbell according to  claim 1 , wherein each of the plurality of dumbbell plates comprises a first surface and a second surface which are arranged oppositely, the first surface is provided with a first hitching part, the second surface is provided with a second hitching part hitched to and matched with the first hitching part. 
     
     
         4 . The dumbbell according to  claim 3 , wherein the first hitching part is arranged on one side of the concave inserting-connection port of the first surface of each of the plurality of dumbbell plates. 
     
     
         5 . The dumbbell according to  claim 4 , wherein the first hitching part is a convex strip formed by the first surface extending outwards;
 the second hitching part is a groove formed by the second surface extending inwards, and a first end of the groove in a length direction extends upwards to a top surface of each of the plurality of dumbbell plates; and   the convex strip of one of two adjacent dumbbell plates of the plurality of dumbbell plates is embeddable into the groove of another one of the two adjacent dumbbell plates, and a second end of the convex strip in a length direction abuts against a second end of the groove in the length direction in response to the two adjacent dumbbell plates being hitched.   
     
     
         6 . The dumbbell according to  claim 1 , wherein each of the at least one bolt comprises a bolt head and a bolt rod, and a first end of the bolt rod is fixedly connected to the bolt head. 
     
     
         7 . The dumbbell according to  claim 6 , wherein a mounting groove for accommodating the bolt head is formed at an outer port of the first bolt hole or the second bolt hole of each of the plurality of dumbbell plates, and a shape of the mounting groove is matched with a shape of the bolt head. 
     
     
         8 . The dumbbell according to  claim 1 , wherein a storage through hole is formed at a top of each of the two hitching assemblies, and the at least one bolt is inserted into the bridge block through the storage through hole for storage. 
     
     
         9 . The dumbbell according to  claim 1 , wherein a grip sleeve is sleeved on an outer side of a grip of the dumbbell rod. 
     
     
         10 . A dumbbell assembly comprising:
 a dumbbell comprising:
 a dumbbell rod assembly comprising a dumbbell rod and two hitching assemblies, wherein the two hitching assemblies are arranged at two ends of the dumbbell rod, each of the two hitching assemblies comprises a bridge block, each of the bridge blocks defines a plurality of bridge block through holes; 
 a plurality of dumbbell plates, wherein each of the plurality of dumbbell plates defines a first bolt hole, a second bolt hole, and a concave inserting-connection port between the first bolt hole and the second bolt; the concave inserting-connection port is configured to receive a corresponding one of the bridge blocks; the first bolt hole and the second bolt hole of each of the plurality of dumbbell plates and a corresponding one of the plurality of bridge block through holes form a bolt channel; a bottom of each of the plurality of dumbbell plates defines groove structures; 
 at least one bolt arranged on each of the two hitching assemblies, wherein each of the at least one bolt is configured to extend through a corresponding one of the bolt channels; and 
   a tray for placing the dumbbell, wherein a plurality of inserting-connection plates are arranged at a top of the tray;   wherein each of the plurality of dumbbell plates is inserted between two adjacent ones of the plurality of inserting-connection plates, and a top of each of the plurality of inserting-connection plates is configured to abut against at least one of the groove structures.   
     
     
         11 . The dumbbell assembly according to  claim 10 , wherein a distance between the two adjacent ones of the plurality of inserting-connection plates is equivalent to a thickness of one of the plurality of dumbbell plates. 
     
     
         12 . The dumbbell assembly according to  claim 10 , wherein the dumbbell further comprises a limiting plate movably arranged in each of the two hitching assemblies, each of the at least one bolt defines a limiting clamping port, each of the limiting plates is configured to clamp a corresponding one of the limiting clamping ports to allow the at least one bolt to be locked or released on a corresponding one of the two hitching assemblies. 
     
     
         13 . The dumbbell assembly according to  claim 12 , wherein an intersection of each of the limiting plates and a corresponding one of the plurality of bridge block through holes is designed as a limiting groove with an arc-shaped top; and a bottom surface of the limiting clamping port of each of the at least one bolt is an arc-shaped surface. 
     
     
         14 . The dumbbell assembly according to  claim 12 , wherein the limiting plate defines a plurality of limiting grooves;
 a top of one of the plurality of limiting grooves is located above a corresponding one of the plurality of bridge block through holes in response to the dumbbell assembly in an unlocked state;   the top of the one of the plurality of limiting grooves is clamped at the limiting port of a corresponding one of the at least one bolt in response to the dumbbell assembly in an unlocked state.   
     
     
         15 . The dumbbell assembly according to  claim 12 , wherein a first end of a limiting rod is fixedly connected to each of the limiting plates, and a second end of the limiting rod vertically extends through each of the two hitching assemblies; and
 a limiting protruding block is arranged at each of two sides of the tray, and each of the limiting protruding blocks is configured to abut against a corresponding one of the limiting rods.   
     
     
         16 . The dumbbell assembly according to  claim 15 , wherein one end of each of the bridge blocks is fixedly connected to a first baffle, and another end of each of the bridge blocks is fixedly connected to a second baffle. 
     
     
         17 . The dumbbell assembly according to  claim 16 , wherein each of the first baffles or each of the second baffles defines a channel for accommodating a corresponding one of the limiting rods;
 a first port of each of the channels extends through a bottom of each of the first baffles or each of the second baffles, and a second port of each of the channels communicates with a corresponding one of the bridge blocks.   
     
     
         18 . The dumbbell assembly according to  claim 17 , wherein a cover plate is arranged at a top of each of the bridge blocks, and a limiting spring is arranged between each of the limiting plates and each of the cover plates. 
     
     
         19 . The dumbbell assembly according to  claim 10 , wherein a plurality of anti-skid pads are arranged at a bottom of the tray.