Counterweight mechanism of fitness equipment

Abstract

The invention discloses a counterweight mechanism of fitness equipment. The fitness equipment counterweight mechanism comprises a base, a plurality of grooves are formed in the base, a counterweight block is vertically arranged in each groove, a first positioning hole is formed in the portion, exposed out of the groove, of each counterweight block, a wrapping groove is formed in the bottom of an upper top plate, and the upper portion of each counterweight block is contained in the wrapping groove; second positioning holes corresponding to the first positioning holes in the balancing weights in position are formed in the upper top plate, positioning rods capable of being inserted into the first positioning holes are horizontally arranged in the second positioning holes in a sliding mode, the rotating part can be rotationally arranged on the front side of the upper top plate along the axis of the rotating part, and a plurality of cams corresponding to the positioning rods in position are coaxially arranged on the rotating part. The end, away from the second positioning hole, of the positioning rod makes contact with the periphery of the cam, and when the cam rotates, under the effect of the peripheral radian of the cam, the cam drives the positioning rod to be inserted into or away from the first positioning hole in the balancing weight. By means of the fitness equipment counterweight mechanism, the situation that the height is too high due to the fact that the counterweight blocks are stacked and placed is avoided.

Description

Technical Field

[0001] The invention relates to the field of fitness equipment, and in particular to a weight counterweight mechanism of fitness equipment. Background Art

[0002] Fitness equipment is often divided into two categories according to the number of training functions: single-function and comprehensive multi-function. Commonly used ones include rowing machines, fitness bikes, steppers, treadmills, waist beauty machines, etc.

[0003] In the prior art, fitness equipment is often used with a counterweight mechanism. For example, the utility model patent with publication number CN214913040U discloses an adjustable fitness equipment counterweight, including a protective frame, a base is provided at the inner bottom of the protective frame, the base is fixedly connected to the protective frame, and a counterweight block is provided above the base, the counterweight block is arranged inside the protective frame, and the counterweight block is movably connected to the protective frame, a sliding rod is provided inside the protective frame, the counterweight block is connected to the sliding rod, and a bracket is installed at the top of the protective frame, and a pulley is provided on the bracket. The adjustable fitness equipment counterweight is provided with a protective frame to protect the counterweight block, which can effectively prevent the exerciser from contacting with the counterweight block and other components, thereby avoiding the occurrence of safety accidents. The rubber pads provided between the counterweight blocks can effectively reduce the impact caused by the counterweight block falling, and can reduce the noise generated by the counterweight blocks hitting each other, thereby reducing noise and optimizing the environment. A shock-absorbing spring is installed inside the base to reduce the vibration caused by the counterweight block falling.

[0004] At present, most of the fitness equipment on the market adopts this kind of counterweight structure in which several counterweight blocks are stacked, which leads to the problem of the counterweight structure being too high. Summary of the invention

[0005] The object of the present invention is to provide a weight counterweight mechanism for fitness equipment, thereby avoiding the situation where the weight blocks are stacked and placed so as to be too high.

[0006] The purpose of the present invention is achieved by the following technical solutions:

[0007] A weight-bearing mechanism for fitness equipment, comprising:

[0008] A base, wherein a plurality of grooves are formed on the top of the base;

[0009] A counterweight block, wherein each of the grooves is vertically provided with a counterweight block, the lower portion of the counterweight block can be used to be arranged in the groove, and the portion of the counterweight block exposed outside the groove is provided with a first positioning hole;

[0010] An upper top plate, wherein the bottom of the upper top plate has a covering groove, the upper part of the counterweight block is accommodated in the covering groove, the upper top plate is provided with a second positioning hole corresponding to the position of the first positioning hole on each counterweight block, and each of the second positioning holes is horizontally slidable with a positioning rod that can be inserted into the first positioning hole;

[0011] A rotating part, which can be rotatably arranged along its own axis and is arranged on the front side of the upper top plate. A plurality of cams corresponding to the position of the positioning rod are coaxially arranged on the rotating part. The end of the positioning rod away from the second positioning hole contacts the outer periphery of the cam. When the cam rotates, under the action of the outer periphery of the cam, the cam drives the positioning rod to be inserted into or away from the first positioning hole on the counterweight block.

[0012] Preferably, the rotating part includes a rotating shaft and a rotating wheel, both ends of the rotating shaft are rotatably connected to the upper top plate through bearings respectively, and the rotating wheel is coaxially connected to the rotating shaft and is used to drive the rotating wheel to rotate along its central axis.

[0013] Preferably, the weight-bearing mechanism of the fitness equipment further comprises a plurality of spacer blocks, the spacer blocks are arranged at intervals in the covering groove, and the upper part of the weight-bearing block is accommodated between every two adjacent spacer blocks.

[0014] Preferably, the fitness equipment weight-bearing mechanism further includes positioning plates, sliding rods and springs whose number and positions correspond to those of the positioning rods. The sliding rods are connected to the front side of the upper plate and are located above the positioning rods. The positioning plate is horizontally slidably connected to the sliding rods. The positioning plate is fixedly connected to the positioning rods. The springs are sleeved on the positioning rods. The springs are located between the positioning plates and the upper plate. The periphery of each cam has at least one protrusion and a recess.

[0015] Preferably, one end of the positioning rod away from the second positioning hole is a roller.

[0016] Preferably, the number of counterweight blocks in the counterweight mechanism of the fitness equipment is 2n+1, wherein n is a positive integer, and the weight of the counterweight block extending to the left along the middle position is symmetrical with the weight of the counterweight block extending to the right along the middle position.

[0017] Preferably, the weight-bearing mechanism of the fitness equipment comprises seven cams, when the cams are rotated so that the roller is located at the protruding part, the positioning rod moves to be inserted into the first positioning hole, when the cams are rotated so that the roller is located at the recessed part, the positioning rod moves away from the first positioning hole, and the rotating wheel has sixteen positions;

[0018] When the rotating wheel rotates to the first working position, each of the rollers is located in the concave portion of the corresponding cam;

[0019] When the rotating wheel rotates to the second working position, the roller located in the middle position is located at the protruding part of the corresponding cam, and the other rollers are located at the concave part of the corresponding cam;

[0020] When the rotating wheel rotates to the third working position, the rollers located at the far left and the far right are located at the protruding parts of the corresponding cams, and the other rollers are located at the concave parts of the corresponding cams;

[0021] When the rotating wheel rotates to the fourth station, the rollers at the far left, the middle, and the far right are located at the protruding parts of the corresponding cams, and the other rollers are located at the concave parts of the corresponding cams;

[0022] When the rotating wheel rotates to the fifth station, the second roller on the left and the second roller on the right are located at the protruding parts of the corresponding cams, and the other rollers are located at the concave parts of the corresponding cams;

[0023] When the rotating wheel rotates to the sixth station, the rollers located at the second position on the left, the middle position, and the second position on the right are located at the protruding parts of the corresponding cams, and the other rollers are located at the concave parts of the corresponding cams;

[0024] When the rotating wheel rotates to the seventh station, the first roller on the left, the second roller on the left, the first roller on the right, and the second roller on the right are located at the protruding parts of the corresponding cams, and the other rollers are located at the concave parts of the corresponding cams;

[0025] When the rotating wheel rotates to the eighth position, the first roller on the left, the second roller on the left, the middle position, the first roller on the right, and the second roller on the right are located at the protruding parts of the corresponding cams, and the other rollers are located at the concave parts of the corresponding cams;

[0026] When the rotating wheel rotates to the ninth station, the third roller on the left and the third roller on the right are located at the protruding parts of the corresponding cams, and the other rollers are located at the concave parts of the corresponding cams;

[0027] When the rotating wheel rotates to the tenth station, the third roller on the left, the middle position, and the third roller on the right are located at the protruding parts of the corresponding cams, and the other rollers are located at the concave parts of the corresponding cams;

[0028] When the rotating wheel rotates to the eleventh station, the first roller on the left, the third roller on the left, the first roller on the right, and the third roller on the right are located at the protruding parts of the corresponding cams, and the other rollers are located at the concave parts of the corresponding cams;

[0029] When the rotating wheel rotates to the twelfth position, the first roller on the left, the third roller on the left, the middle roller, the first roller on the right and the third roller on the right are located at the protruding parts of the corresponding cams, and the other rollers are located at the concave parts of the corresponding cams;

[0030] When the rotating wheel rotates to the thirteenth station, the second roller on the left, the third roller on the left, the second roller on the right and the third roller on the right are located at the protruding parts of the corresponding cams, and the other rollers are located at the concave parts of the corresponding cams;

[0031] When the rotating wheel rotates to the fourteenth position, the rollers located at the second left, the third left, the middle, the second right and the third right are located at the protruding parts of the corresponding cams, and the other rollers are located at the concave parts of the corresponding cams;

[0032] When the rotating wheel rotates to the fifteenth station, the first roller on the left, the second roller on the left, the third roller on the left, the first roller on the right, the second roller on the right and the third roller on the right are located at the protruding parts of the corresponding cams, and the other rollers are located at the concave parts of the corresponding cams;

[0033] When the rotating wheel rotates to the sixteenth position, each of the rollers is located at the protruding portion of the corresponding cam.

[0034] Preferably, the weight of the first counterweight on the left, the middle counterweight and the first counterweight on the right is 5KG, the weight of the second counterweight on the left and the second counterweight on the right is 10KG, and the weight of the third counterweight on the left and the third counterweight on the right is 20KG.

[0035] Preferably, the weight-bearing mechanism of the fitness equipment further comprises two sliding sleeves and two guide rods, the two sliding sleeves are respectively fixedly connected to the left and right ends of the upper top plate, the guide rods penetrate the sliding sleeves, and the sliding sleeves are slidably connected to the guide rods.

[0036] Preferably, the longitudinal section of the groove is in the shape of an inverted trapezoid, and the portion of the counterweight that can be accommodated in the groove is in the shape of an inverted trapezoid that matches the groove.

[0037] Compared with the prior art, the beneficial effects of the present invention include at least:

[0038] By placing several counterweights at intervals and vertically, not only can the problem of excessive height caused by stacking several counterweights be avoided, but also, through the rotation of the rotating part and the cam, under the action of the outer circumferential curvature of the cam, the cam drives the positioning rod to insert into or move away from the first positioning hole on the counterweight, so that when the upper top plate is pulled upward, the counterweight inserted by the positioning rod moves upward together with the upper top plate and separates from the base, while the counterweight not inserted by the positioning rod is in the base. By adopting this structure, not only can the problem of excessive height caused by stacking counterweights be avoided, but the overall height of the fitness equipment is reduced. At the same time, the coordination of the cam, the positioning rod and the counterweight can reduce the number of counterweights used and reduce the manufacturing cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1It is a schematic diagram of the overall structure of the weight counterweight mechanism of the fitness equipment according to an embodiment of the present invention;

[0040] Figure 2 yes Figure 1 A magnified schematic diagram of the structure of the middle A section;

[0041] Figure 3 It is a structural schematic diagram of a weight counterweight mechanism of a fitness equipment according to an embodiment of the present invention, without a rotating part and a cam;

[0042] Figure 4 It is a schematic diagram of the external structure of the counterweight block and the base in the counterweight mechanism of the fitness equipment according to the embodiment of the present invention;

[0043] Figure 5 It is a cross-sectional schematic diagram of the cooperation between the counterweight block and the base in the counterweight mechanism of the fitness equipment according to the embodiment of the present invention;

[0044] Figure 6 It is a structural schematic diagram of an upper top plate in a weight counterweight mechanism of a fitness equipment according to an embodiment of the present invention.

[0045] In the figure: 1, base; 2, groove; 3, counterweight; 4, first positioning hole; 5, upper top plate; 6, covering groove; 7, second positioning hole; 8, positioning rod; 9, rotating part; 90, rotating shaft; 91, rotating wheel; 10, cam; 100, protrusion; 101, recessed part; 11, block; 12, positioning plate; 13, sliding rod; 14, spring; 15, roller; 16, sliding sleeve; 17, guide rod. DETAILED DESCRIPTION

[0046] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided to make the present invention more comprehensive and complete and to fully convey the concepts of example embodiments to those skilled in the art. The same reference numerals in the figures represent the same or similar structures, and thus their repeated description will be omitted.

[0047] The words expressing positions and directions described in the present invention are all explained with reference to the accompanying drawings as examples, but they can be changed as needed, and all such changes are included in the protection scope of the present invention.

[0048] The invention discloses a weight counterweight mechanism of fitness equipment, comprising: a base 1, a weight counterweight 3, an upper top plate 5 and a rotating part 9.

[0049] like Figures 1 to 6As shown, a plurality of grooves 2 are provided on the top of the base 1, and a counterweight 3 is vertically arranged in each groove 2. The lower part of the counterweight 3 can be used to be arranged in the groove 2, and the part of the counterweight 3 exposed outside the groove 2 is provided with a first positioning hole 4. The bottom of the upper top plate 5 has a covering groove 6, and the upper part of the counterweight 3 is accommodated in the covering groove 6. The upper top plate 5 is provided with a second positioning hole 7 corresponding to the position of the first positioning hole 4 on each counterweight 3, and each second positioning hole 7 is provided with a positioning rod 8 which can be inserted into the first positioning hole 4 and slides horizontally. The rotating part 9 can be rotatably arranged on the front side of the upper top plate 5 along its own axis, and a plurality of cams 10 corresponding to the position of the positioning rod 8 are coaxially arranged on the rotating part 9, and the end of the positioning rod 8 away from the second positioning hole 7 contacts with the outer periphery of the cam 10. When the cam 10 rotates, under the action of the outer periphery of the cam 10, the cam 10 drives the positioning rod 8 to insert into or away from the counterweight. The first positioning hole 4 on the counterweight block 3, specifically, during operation, when the rotating part 9 rotates, the cam 10 rotates with the rotating part 9, and the rotation of the cam 10 makes the parts of different arcs of the outer circumference of the cam 10 continuously contact with the positioning rod 8, so as to promote the positioning rod 8 to be inserted into the first positioning hole 4 on the counterweight block 3 or to be away from the first positioning hole 4 on the counterweight block 3, so that when the user pulls up the upper top plate 5, the counterweight block 3 inserted by the positioning rod 8 moves upward together with the upper top plate 5 and separates from the base 1, while the counterweight block 3 not inserted by the positioning rod 8 is in the base 1, so as to obtain the required weight. By adopting this structure, not only can the problem of excessive height caused by stacking multiple counterweight blocks 3 be avoided, but also the overall height of the fitness equipment can be reduced. At the same time, the coordination of the cam 10, the positioning rod 8 and the counterweight block 3 can reduce the number of counterweight blocks 3 used, thereby reducing the manufacturing cost.

[0050] As a further implementation of this embodiment, Figure 1 As shown, the rotating part 9 includes a rotating shaft 90 and a rotating wheel 91, and the cams 10 are coaxially connected to the rotating shaft 90. Both ends of the rotating shaft 90 are rotatably connected to the upper top plate 5 through bearings. The rotating wheel 91 is coaxially connected to the rotating shaft 90 and is used to drive the rotating wheel 91 to rotate along its axis. In this embodiment, the rotating wheel 91 can be manually driven to rotate by a staff member, or it can be driven to rotate by a motor.

[0051] As a further implementation of this embodiment, Figure 6 As shown, the fitness equipment weight mechanism also includes a plurality of spacer blocks 11, and the spacer blocks 11 are spaced apart in the covering groove 6, and the upper part of the counterweight block 3 is accommodated between every two adjacent spacer blocks 11. Specifically, when the counterweight block 3 is accommodated between every two adjacent spacer blocks 11, the counterweight block 3 is restricted from shaking along the horizontal extension direction of the covering groove 6, thereby improving the stability of the counterweight block 3 when it moves upward following the upper top plate 5, reducing the swinging, and being safer to use.

[0052] As a further implementation of this embodiment, Figures 1 to 3 As shown, the weight-bearing mechanism of the fitness equipment also includes a positioning plate 12, a slide bar 13 and a spring 14, the number and position of which are corresponding to the positioning rod 8. The slide bar 13 is connected to the front side of the upper top plate 5 and is located above the positioning rod 8. The positioning plate 12 is horizontally slidably connected to the slide bar 13, and the positioning plate 12 is fixedly connected to the positioning rod 8. The spring 14 is sleeved on the positioning rod 8, and the spring 14 is located between the positioning plate 12 and the upper top plate 5. The periphery of each cam 10 has at least one protrusion 100 and a recessed portion 101. Specifically, when the cam 10 rotates, when the protrusion of the periphery of the cam 10 contacts the positioning rod 8, the positioning rod 8 is inserted into the first positioning hole 4 under the action of the arc of the cam 10, and the positioning plate 1 2 compresses the spring 14. When the cam 10 continues to rotate, the concave portion 101 on the outer periphery of the cam 10 contacts the positioning rod 8. At the same time, the spring 14 is reset to drive the positioning rod 8 away from the first positioning hole 4, so that the end of the positioning rod 8 away from the first positioning hole 4 abuts against the concave portion 101. It should be noted that the end of the positioning rod 8 away from the first positioning hole 4 continues to contact the cam 10, and will not be separated from the cam 10 at the concave portion or the convex portion or the transition portion between the two. In this embodiment, the contact between the concave portion 101 or the convex portion 100 and the positioning rod 8 is switched by the rotation of the cam 10. This method is not only simple in structure and very efficient, but also not easy to be damaged and has a long service life.

[0053] As a further implementation of this embodiment, Figure 1 and Figure 2 As shown, one end of the positioning rod 8 away from the second positioning hole 7 is a roller 15 , and the arrangement of the roller 15 can make the contact with the cam 10 smoother.

[0054] As a further implementation of this embodiment, the number of counterweight blocks 3 in the counterweight mechanism of the fitness equipment is 2n+1, where n is a positive integer. The number of counterweight blocks 3 is, for example: 3, 5, 7, 9, 11, 13, 15... The weight of the counterweight block 3 extending to the left along the middle position is symmetrical with the weight of the counterweight block 3 extending to the right along the middle position, thereby improving the stability of the counterweight block 3 when it is lifted upward, effectively reducing the safety risk.

[0055] In this embodiment, Figure 1As shown, the weight-balancing mechanism of the fitness equipment includes seven cams 10, the weight of the weight block 3 extending to the left along the middle position is symmetrical with the weight block 3 extending to the right along the middle position, the weight of the first weight block 3 on the left, the middle position and the first weight block 3 on the right is 5KG, the weight of the second weight block 3 on the left and the second weight block on the right is 10KG, the weight of the third weight block 3 on the left and the third weight block on the right is 20KG, when the cam 10 rotates so that the roller 15 is located at the protruding portion 100 of the cam 10, the positioning rod 8 moves to be inserted into the first positioning hole 4, when the cam 10 rotates so that the roller 15 is located at the recessed portion 101 of the cam 10, the positioning rod 8 moves away from the first positioning hole 4, in this embodiment, the rotating wheel 91 has sixteen stations;

[0056] When the rotating wheel 91 rotates to the first position, each roller 15 is located in the concave portion 101 of the corresponding cam 10, and all the positioning rods 8 are not inserted into the corresponding first positioning holes 4. When the upper plate 5 is pulled up, all the counterweights 3 are still located in the base 1, and the weight at this time is the weight of the upper plate 5 itself;

[0057] When the rotating wheel 91 rotates to the second working position, the roller 15 at the middle position is located at the protruding portion 100 of the corresponding cam 10, and the other rollers 15 are located at the recessed portion 101 of the corresponding cam 10, and the positioning rod 8 at the middle position is inserted into the corresponding first positioning hole 4. When the upper top plate 5 is pulled up, the counterweight block 3 at the middle position moves upward with the upper top plate 5, and the weight at this time is 5KG;

[0058] When the rotating wheel 91 rotates to the third position, the rollers 15 on the far left and far right are located at the protruding portion 100 of the corresponding cam 10, and the other rollers 15 are located at the recessed portion 101 of the corresponding cam 10, and the positioning rods 8 on the far left and far right are inserted into the corresponding first positioning holes 4. When the upper top plate 5 is pulled up, the counterweights 3 on the far left and far right follow the upper top plate 5 to move upward, and the weight at this time is 10KG;

[0059] When the rotating wheel 91 rotates to the fourth station, the rollers 15 located at the far left, middle and right sides are located at the protruding parts 100 of the corresponding cams 10, and the other rollers 15 are located at the recessed parts 101 of the corresponding cams 10. The positioning rods 8 located at the far left, middle and right sides are inserted into the corresponding first positioning holes 4. When the top plate 5 is pulled up, the counterweights 3 located at the far left, middle and right sides move upward with the top plate 5. The weight at this time is 15KG.

[0060] When the rotating wheel 91 rotates to the fifth position, the second roller 15 on the left and the second roller 15 on the right are located at the protruding portion 100 of the corresponding cam 10, and the other rollers 15 are located at the recessed portion 101 of the corresponding cam 10, and the second positioning rod 8 on the left and the second positioning rod 8 on the right are inserted into the corresponding first positioning hole 4. When the upper top plate 5 is pulled up, the second counterweight 3 on the left and the second counterweight 3 on the right follow the upper top plate 5 to move upward, and the weight at this time is 20KG;

[0061] When the rotating wheel 91 rotates to the sixth station, the rollers 15 located at the second left, the middle position, and the second right side are located at the protruding portion 100 of the corresponding cam 10, and the other rollers 15 are located at the recessed portion 101 of the corresponding cam 10. The positioning rods 8 located at the second left, the middle position, and the second right side are inserted into the corresponding first positioning holes 4. When the upper top plate 5 is pulled up, the counterweight block 3 located at the second left, the middle position, and the second right side moves upward with the upper top plate 5, and the weight at this time is 25KG.

[0062] When the rotating wheel 91 rotates to the seventh station, the first roller 15 located on the left, the second roller 15 on the left, the first roller 15 on the right, and the second roller 15 on the right are located at the protruding portion 100 of the corresponding cam 10, and the other rollers 15 are located at the recessed portion 101 of the corresponding cam 10, and the first positioning rods 8 located on the left, the second roller 15 on the left, the first roller 15 on the right, and the second roller 15 on the right are inserted into the corresponding first positioning holes 4. When the upper top plate 5 is pulled up, the first counterweights 3 located on the left, the second roller 15 on the left, the first roller 15 on the right, and the second roller 15 on the right move upward with the upper top plate 5, and the weight at this time is 30KG;

[0063] When the rotating wheel 91 rotates to the eighth station, the rollers 15 located at the first on the left, the second on the left, the middle, the first on the right, and the second on the right are located at the protruding portion 100 of the corresponding cam 10, and the other rollers 15 are located at the recessed portion 101 of the corresponding cam 10, and the positioning rods 8 located at the first on the left, the second on the left, the middle, the first on the right, and the second on the right are inserted into the corresponding first positioning holes 4. When the upper top plate 5 is pulled up, the counterweights 3 located at the first on the left, the second on the left, the middle, the first on the right, and the second on the right follow the upper top plate 5 to move upward, and the weight at this time is 35KG;

[0064] When the rotating wheel 91 rotates to the ninth station, the third roller 15 on the left and the third roller 15 on the right are located at the protruding portion 100 of the corresponding cam 10, and the other rollers 15 are located at the recessed portion 101 of the corresponding cam 10, and the third positioning rod 8 on the left and the third roller 15 on the right are inserted into the corresponding first positioning hole 4. When the upper top plate 5 is pulled up, the third counterweight 3 on the left and the third roller 15 on the right move upward with the upper top plate 5, and the weight at this time is 40KG;

[0065] When the rotating wheel 91 rotates to the tenth station, the rollers 15 located at the third on the left, the middle position, and the third on the right are located at the protruding portion 100 of the corresponding cam 10, and the other rollers 15 are located at the recessed portion 101 of the corresponding cam 10. The positioning rods 8 located at the third on the left, the middle position, and the third on the right are inserted into the corresponding first positioning holes 4. When the upper top plate 5 is pulled up, the counterweights 3 located at the third on the left, the middle position, and the third on the right move upward with the upper top plate 5, and the weight at this time is 45KG.

[0066] When the rotating wheel 91 rotates to the eleventh station, the first roller 15 located on the left, the third roller on the left, the first roller on the right, and the third roller on the right are located on the protruding portion 100 of the corresponding cam 10, and the other rollers 15 are located on the concave portion 101 of the corresponding cam 10, and the positioning rods 8 located on the left, the third roller on the left, the first roller on the right, and the third roller on the right are inserted into the corresponding first positioning holes 4. When the upper top plate 5 is pulled up, the counterweights 3 located on the left, the third roller on the left, the first roller on the right, and the third roller on the right move upward with the upper top plate 5, and the weight at this time is 50KG;

[0067] When the rotating wheel 91 rotates to the twelfth station, the rollers 15 located at the first on the left, the third on the left, the middle, the first on the right and the third on the right are located at the protruding portion 100 of the corresponding cam 10, and the other rollers 15 are located at the recessed portion 101 of the corresponding cam 10, and the positioning rods 8 located at the first on the left, the third on the left, the middle, the first on the right and the third on the right are inserted into the corresponding first positioning holes 4. When the upper top plate 5 is pulled up, the counterweights 3 located at the first on the left, the third on the left, the middle, the first on the right and the third on the right follow the upper top plate 5 to move upward, and the weight at this time is 55KG;

[0068] When the rotating wheel 91 rotates to the thirteenth station, the rollers 15 located at the second left, the third left, the second right and the third right are located at the protruding portion 100 of the corresponding cam 10, and the other rollers 15 are located at the recessed portion 101 of the corresponding cam 10, and the positioning rods 8 located at the second left, the third left, the second right and the third right are inserted into the corresponding first positioning holes 4. When the upper top plate 5 is pulled up, the counterweights 3 located at the second left, the third left, the second right and the third right follow the upper top plate 5 to move upward, and the weight at this time is 60KG;

[0069] When the rotating wheel 91 rotates to the fourteenth station, the rollers 15 located at the second left, the third left, the middle, the second right and the third right are located at the protruding portion 100 of the corresponding cam 10, and the other rollers 15 are located at the recessed portion 101 of the corresponding cam 10, and the positioning rods 8 located at the second left, the third left, the middle, the second right and the third right are inserted into the corresponding first positioning holes 4. When the upper top plate 5 is pulled up, the counterweights 3 located at the second left, the third left, the middle, the second right and the third right follow the upper top plate 5 to move upward, and the weight at this time is 65KG;

[0070] When the rotating wheel 91 rotates to the fifteenth station, the rollers 15 located at the first on the left, the second on the left, the third on the left, the first on the right, the second on the right and the third on the right are located at the protruding parts 100 of the corresponding cams 10, and the other rollers 15 are located at the recessed parts 101 of the corresponding cams 10, and the positioning rods 8 located at the first on the left, the second on the left, the third on the left, the first on the right, the second on the right and the third on the right are inserted into the corresponding first positioning holes 4. When the upper top plate 5 is pulled upward, the counterweights 3 located at the first on the left, the second on the left, the third on the left, the first on the right, the second on the right and the third on the right follow the upper top plate 5 to move upward, and the weight at this time is 70KG;

[0071] When the rotating wheel 91 rotates to the sixteenth position, each roller 15 is located at the protrusion 100 of the corresponding cam 10, and each positioning rod 8 is inserted into the corresponding first positioning hole 4. When the upper top plate 5 is pulled upward, all the counterweight blocks 3 move upward with the upper top plate 5, and the weight at this time is 75KG.

[0072] As a further implementation of this embodiment, Figure 1 and Figure 3 As shown, the weight-bearing mechanism of the fitness equipment also includes two sliding sleeves 16 and two guide rods 17. The two sliding sleeves 16 are respectively fixedly connected to the left and right ends of the upper top plate 5. The guide rod 17 passes through the sliding sleeves 16. The sliding sleeves 16 are slidably connected to the guide rods 17. In this embodiment, the guide rods 17 can be fixed to the fitness equipment or to the base 1, so that when the user pulls up the upper top plate 5, the movement of the upper top plate 5 is more stable and less likely to deflect or shake, thereby improving the overall safety of the fitness equipment.

[0073] As a further implementation of this embodiment, Figure 5 As shown, the longitudinal section of the groove 2 is in an inverted trapezoidal shape, and the portion of the counterweight 3 that can be accommodated in the groove 2 is in an inverted trapezoidal shape that matches the groove 2. In this embodiment, when the counterweight 3 is inserted into the groove 2 of the base 1, the inverted trapezoidal shape of the counterweight 3 matches the inverted trapezoidal shape of the groove 2, so that the counterweight 3 is more stable when placed and is not prone to deflection or shaking, while also improving the overall safety of the fitness equipment.

[0074] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, substitute and modify the above embodiments within the scope of the invention without departing from the principles and purpose of the present invention. All such changes should fall within the scope of protection of the claims of the present invention.

Claims

1. A weight-bearing mechanism for fitness equipment, characterized in that: include: A base, wherein a plurality of grooves are formed on the top of the base; A counterweight block, wherein each of the grooves is vertically provided with a counterweight block, the lower portion of the counterweight block can be used to be arranged in the groove, and the portion of the counterweight block exposed outside the groove is provided with a first positioning hole; An upper top plate, wherein the bottom of the upper top plate has a covering groove, the upper part of the counterweight block is accommodated in the covering groove, the upper top plate is provided with a second positioning hole corresponding to the position of the first positioning hole on each counterweight block, and each of the second positioning holes is horizontally slidable with a positioning rod that can be inserted into the first positioning hole; A rotating part, which can be rotatably arranged along its own axis and is arranged on the front side of the upper top plate. A plurality of cams corresponding to the position of the positioning rod are coaxially arranged on the rotating part. The end of the positioning rod away from the second positioning hole contacts the outer periphery of the cam. When the cam rotates, under the action of the outer periphery of the cam, the cam drives the positioning rod to be inserted into or away from the first positioning hole on the counterweight block.

2. The fitness equipment weight-bearing mechanism according to claim 1, characterized in that: The rotating part includes a rotating shaft and a rotating wheel. Both ends of the rotating shaft are rotatably connected to the upper top plate through bearings respectively. The rotating wheel is coaxially connected to the rotating shaft and is used to drive the rotating wheel to rotate along its axis.

3. The fitness equipment weight-bearing mechanism according to claim 1, characterized in that: The fitness equipment weight-bearing mechanism also includes a plurality of spacer blocks, the spacer blocks are arranged at intervals in the covering groove, and the upper part of the weight-bearing block is accommodated between every two adjacent spacer blocks.

4. The fitness equipment weight-bearing mechanism according to claim 1, characterized in that: The fitness equipment weight-bearing mechanism also includes a positioning plate, a sliding rod and a spring whose number and position correspond to the positioning rod. The sliding rod is connected to the front side of the upper plate and is located above the positioning rod. The positioning plate is horizontally slidably connected to the sliding rod. The positioning plate is fixedly connected to the positioning rod. The spring is sleeved on the positioning rod. The spring is located between the positioning plate and the upper plate. The periphery of each cam has at least one protrusion and a recessed portion.

5. The fitness equipment weight-bearing mechanism according to claim 1, characterized in that: One end of the positioning rod away from the second positioning hole is a roller.

6. The fitness equipment weight-bearing mechanism according to claim 5, characterized in that: The number of counterweight blocks in the weight-balancing mechanism of the fitness equipment is 2n+1, wherein n is a positive integer, and the weight of the counterweight block extending to the left along the middle position is symmetrical to the weight of the counterweight block extending to the right along the middle position.

7. The fitness equipment weight-bearing mechanism according to claim 5, characterized in that: The weight-bearing mechanism of the fitness equipment comprises seven cams, when the cams are rotated so that the roller is located at the protruding part, the positioning rod moves to be inserted into the first positioning hole, when the cams are rotated so that the roller is located at the recessed part, the positioning rod moves away from the first positioning hole, and the rotating wheel has sixteen positions; When the rotating wheel rotates to the first working position, each of the rollers is located in the concave portion of the corresponding cam; When the rotating wheel rotates to the second working position, the roller located in the middle position is located at the protruding part of the corresponding cam, and the other rollers are located at the concave part of the corresponding cam; When the rotating wheel rotates to the third working position, the rollers located at the far left and the far right are located at the protruding parts of the corresponding cams, and the other rollers are located at the concave parts of the corresponding cams; When the rotating wheel rotates to the fourth station, the rollers at the far left, the middle, and the far right are located at the protruding parts of the corresponding cams, and the other rollers are located at the concave parts of the corresponding cams; When the rotating wheel rotates to the fifth station, the second roller on the left and the second roller on the right are located at the protruding parts of the corresponding cams, and the other rollers are located at the concave parts of the corresponding cams; When the rotating wheel rotates to the sixth station, the rollers located at the second position on the left, the middle position, and the second position on the right are located at the protruding parts of the corresponding cams, and the other rollers are located at the concave parts of the corresponding cams; When the rotating wheel rotates to the seventh station, the first roller on the left, the second roller on the left, the first roller on the right, and the second roller on the right are located at the protruding parts of the corresponding cams, and the other rollers are located at the concave parts of the corresponding cams; When the rotating wheel rotates to the eighth position, the first roller on the left, the second roller on the left, the middle position, the first roller on the right, and the second roller on the right are located at the protruding parts of the corresponding cams, and the other rollers are located at the concave parts of the corresponding cams; When the rotating wheel rotates to the ninth station, the third roller on the left and the third roller on the right are located at the protruding parts of the corresponding cams, and the other rollers are located at the concave parts of the corresponding cams; When the rotating wheel rotates to the tenth station, the third roller on the left, the middle position, and the third roller on the right are located at the protruding parts of the corresponding cams, and the other rollers are located at the concave parts of the corresponding cams; When the rotating wheel rotates to the eleventh station, the first roller on the left, the third roller on the left, the first roller on the right, and the third roller on the right are located at the protruding parts of the corresponding cams, and the other rollers are located at the concave parts of the corresponding cams; When the rotating wheel rotates to the twelfth position, the first roller on the left, the third roller on the left, the middle roller, the first roller on the right and the third roller on the right are located at the protruding parts of the corresponding cams, and the other rollers are located at the concave parts of the corresponding cams; When the rotating wheel rotates to the thirteenth station, the second roller on the left, the third roller on the left, the second roller on the right and the third roller on the right are located at the protruding parts of the corresponding cams, and the other rollers are located at the concave parts of the corresponding cams; When the rotating wheel rotates to the fourteenth position, the rollers located at the second left, the third left, the middle, the second right and the third right are located at the protruding parts of the corresponding cams, and the other rollers are located at the concave parts of the corresponding cams; When the rotating wheel rotates to the fifteenth station, the first roller on the left, the second roller on the left, the third roller on the left, the first roller on the right, the second roller on the right and the third roller on the right are located at the protruding parts of the corresponding cams, and the other rollers are located at the concave parts of the corresponding cams; When the rotating wheel rotates to the sixteenth position, each of the rollers is located at the protruding portion of the corresponding cam.

8. The fitness equipment weight-bearing mechanism according to claim 7, characterized in that: The weight of the first counterweight on the left, the middle counterweight and the first counterweight on the right is 5KG, the weight of the second counterweight on the left and the second counterweight on the right is 10KG, and the weight of the third counterweight on the left and the third counterweight on the right is 20KG.

9. The fitness equipment weight-bearing mechanism according to claim 1, characterized in that: The fitness equipment weight counterweight mechanism also includes two sliding sleeves and two guide rods. The two sliding sleeves are respectively fixedly connected to the left and right ends of the upper top plate. The guide rods penetrate the sliding sleeves, and the sliding sleeves are slidably connected to the guide rods.

10. The fitness equipment weight-bearing mechanism according to claim 1, characterized in that: The longitudinal section of the groove is in the shape of an inverted trapezoid, and the portion of the counterweight that can be accommodated in the groove is in the shape of an inverted trapezoid that matches the groove.

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