CN212579885U

CN212579885U - Balance wheel assembly and pallet truck

Info

Publication number: CN212579885U
Application number: CN202020465091.7U
Authority: CN
Inventors: 李玉友; 程帮胜
Original assignee: BYD Co Ltd
Current assignee: BYD Co Ltd
Priority date: 2020-04-02
Filing date: 2020-04-02
Publication date: 2021-02-23
Anticipated expiration: 2030-04-02

Abstract

The utility model provides a balance wheel subassembly and pallet truck, balance wheel subassembly include first support, second support, regulating part and balance wheel, and first support rotates with the balance wheel to be connected, and the second support rotates with first support to be connected, and the second support is used for being connected to the automobile body, and first support and second support are connected to the regulating part, and the regulating part is used for adjusting the turned angle of the relative first support of second support. Through setting up first support and second support rotation connection, first support and second support are connected to the regulating part, thereby the turned angle of the relative first support of second support can be adjusted to the regulating part, make turned angle be in reasonable within range, the balance wheel subassembly has better shock attenuation effect and longer working life, in addition, when assembling the balance wheel subassembly, the shock attenuation is adjusted and can be gone on after the assembly is accomplished, other spare parts need not be demolishd to the accommodation process, convenient and fast.

Description

Balance wheel assembly and pallet truck

Technical Field

The utility model belongs to commodity circulation transportation field especially relates to a balance wheel subassembly and pallet truck who has this balance wheel subassembly.

Background

Along with the development of logistics transportation, people also promote increasingly to the requirement of the carrier of logistics transport, and the pallet truck is one of them, and its shock attenuation effect has directly influenced the steady degree of transportation, and the shock attenuation effect of pallet truck mainly is realized by balanced wheel subassembly.

The conventional balance wheel assembly generally obtains a shock absorption function by incorporating a spring, and before assembly, it is required to adjust the compression degree of the spring several times to adjust the shock absorption effect of the balance wheel assembly.

Due to the structure of the built-in spring, the existing balance wheel assembly is inconvenient to disassemble if the damping effect of the balance wheel assembly is to be adjusted after assembly.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a balance wheel subassembly can solve above-mentioned problem.

For realizing the purpose of the utility model, the utility model provides a following technical scheme:

in a first aspect, the utility model provides a balance wheel subassembly, balance wheel subassembly include first support, second support, regulating part and balance wheel, first support with balance wheel rotates to be connected, the second support with first support rotates to be connected, the second support is used for being connected to the automobile body, the regulating part is connected first support with the second support, the regulating part is used for adjusting the second support is relative the turned angle of first support.

In one embodiment, the adjusting member includes an elastic portion and a connecting rod, the connecting rod movably connects the first bracket and the second bracket, the elastic portion is sleeved on the connecting rod, the elastic portion abuts against the first bracket and/or the second bracket, and the elastic portion extends and retracts in the extending direction of the connecting rod.

In one embodiment, the first support comprises a first main body part, a first rotating shaft, a second rotating shaft and an adjusting rod, the first rotating shaft and the second rotating shaft are connected to the first main body part, the first rotating shaft and the second rotating shaft are parallel to each other and have a spacing distance, the first rotating shaft is connected with the balance wheel, the second rotating shaft is connected with the second support, the adjusting rod is connected to the first main body part and located on the second rotating shaft, the second rotating shaft faces away from one side of the first rotating shaft, and the connecting rod is connected with the adjusting rod.

In one embodiment, the second bracket includes a second main body portion and an adjusting plate connected to the second main body portion, the adjusting plate is located on one side of the second rotating shaft facing away from the first rotating shaft and is disposed opposite to the adjusting rod, the connecting rod is connected to the adjusting plate and the adjusting rod, and the elastic portion is abutted to the adjusting plate.

In one embodiment, the adjusting rod is provided with a first connecting hole, the adjusting plate is provided with a second connecting hole, the connecting rod is penetrated through the first connecting hole and the second connecting hole, the elastic part is arranged on the back of the adjusting plate on one side of the adjusting rod, the connecting rod is arranged on the back of the adjusting plate on the first end on one side of the adjusting rod, and the first end is abutted to the elastic part.

In one embodiment, the connecting rod further comprises a second end opposite to the first end, the second end is provided with a locking member, the locking member is abutted to the adjusting rod, and the locking member is located on one side of the adjusting rod, which faces away from the adjusting plate.

In one embodiment, the first main body portion includes a first plate, a first connecting plate and a second plate which are connected in sequence, the first plate, the first connecting plate and the second plate enclose and close to form an accommodating space in the shape of "Contraband", the balance wheel is disposed in the accommodating space, the end portions, far away from the first connecting plate, of the first plate and the second plate are both provided with grooves, the opening direction of the grooves faces away from the second support, and two ends of the adjusting rod are connected with the first plate and the second plate respectively and accommodated in the grooves.

In one embodiment, the second main body includes a third plate, a second connecting plate, and a fourth plate, which are connected in sequence, the adjusting plate is connected to the third plate and the fourth plate, the second main body is provided with a limiting rod, two ends of the limiting rod in the axial direction are respectively connected to the third plate and the fourth plate, and the limiting rod is parallel to the first rotating shaft.

In one embodiment, the second main body further includes a pin shaft, the pin shaft is disposed on a side of the second connecting plate facing away from the first rotating shaft, and the pin shaft is used for connecting with the vehicle body.

In a second aspect, the present invention also provides a pallet truck, which comprises a truck body and a balance wheel assembly as in any one of the embodiments of the first aspect, wherein the truck body is connected with the balance wheel assembly.

Through setting up first support and second support rotation connection, first support and second support are connected to the regulating part can be adjusted the second support relatively the turned angle of first support for turned angle is in reasonable within range, and balanced wheel subassembly has better shock attenuation effect and longer working life, and in addition, when assembling balanced wheel subassembly, the shock attenuation is adjusted and can be gone on after the assembly is accomplished, and other spare parts need not be demolishd to the accommodation process, convenient and fast.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic perspective view of a balance wheel assembly provided by the present invention;

FIG. 2 is a schematic structural view of the balance wheel assembly of FIG. 1;

FIG. 3 is a perspective view of the first bracket of FIG. 1;

FIG. 4 is a perspective view of the second bracket of FIG. 1;

fig. 5 is a schematic perspective view of the pallet truck according to the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work all belong to the protection scope of the present invention.

Referring to fig. 1, 2 and 5, the present invention provides a balance wheel assembly 100, wherein the balance wheel assembly 100 has an adjustable damping function, and can be applied to a carrier for logistics transportation, such as a forklift, a pallet truck, etc. The balance wheel assembly 100 includes a first bracket 10, a second bracket 20, an adjusting member 30, and a balance wheel 40. The first bracket 10 is rotatably connected with the balance wheel 40, the second bracket 20 is rotatably connected with the first bracket 10, and the second bracket 20 is used for connecting to the vehicle body 200. The adjusting member 30 connects the first bracket 10 and the second bracket 20, and the adjusting member 30 is used for adjusting a rotation angle θ of the second bracket 20 relative to the first bracket 10.

Specifically, the first bracket 10 may be made of a material with high strength, and the second bracket 20 may be made of a flexible material with high yield strength and low elastic modulus, so that the second bracket 20 can deform to achieve the damping effect.

It will be appreciated that the adjustment member 30 may provide a space for the second bracket 20 to rotate, so that the second bracket 20 can rotate relative to the first bracket 10, thereby adjusting the height H of the second bracket 20. When the rotation angle θ of the second bracket 20 relative to the first bracket 10 is increased, the height H of the second bracket 20 is increased, the buffering range of the second bracket 20 is increased, the damping effect is enhanced, and the interaction force between the first bracket 10 and the second bracket 20 is increased, so that the crush or the pull is more likely to occur. On the contrary, when the rotation angle θ of the second bracket 20 relative to the first bracket 10 is reduced, the height H of the second bracket 20 is reduced, the buffering range of the second bracket 20 is shortened, the shock absorption effect is weakened, and the interaction force between the first bracket 10 and the second bracket 20 is reduced, so that the service life is longer. Therefore, the rotation angle θ needs to be within a reasonable range to balance the damping effect and the working life.

Rotate through setting up first support 10 and second support 20 and be connected, first support 10 and second support 20 are connected to regulating part 30, thereby regulating part 30 can adjust the turned angle theta of second support 20 relative first support 10, make turned angle theta be in reasonable within range, balance wheel subassembly 100 has better shock attenuation effect and longer working life, in addition, when assembling balance wheel subassembly 100, the shock attenuation is adjusted and can be gone on after the assembly is accomplished, other spare parts need not be demolishd in the accommodation process, and is convenient and fast.

In one embodiment, referring to fig. 1 and 2, the adjusting element 30 includes an elastic portion 31 and a connecting rod 32, the connecting rod 32 movably connects the first bracket 10 and the second bracket 20, the elastic portion 31 is sleeved on the connecting rod 32, the elastic portion 31 abuts against the first bracket 10 and/or the second bracket 20, and the elastic portion 31 extends and retracts in the extending direction of the connecting rod 32. Specifically, the elastic portion 31 may be a spring, a cushion rubber block, or the like, and the cushion rubber block may be a soft material having an appropriate hardness, such as polyurethane.

As can be seen from fig. 1, fig. 1 shows an embodiment in which the elastic portion 31 abuts only against the second bracket 20.

In another embodiment, the elastic portion 31 only abuts against the first bracket 10, that is, the first bracket 10 and the second bracket 20 in the previous embodiment are exchanged, the upper "second bracket 20" is connected with the balance wheel 40 to form the first bracket 10 of the present embodiment, and the lower "first bracket 10" is connected with the vehicle body 200 to form the second bracket 20 of the present embodiment.

In another embodiment, the elastic portion 31 is abutted against the first bracket 10 and the second bracket 20, that is, the elastic portion 31 is disposed between the first bracket 10 and the second bracket 20, and the buffering and damping effects are achieved by the stretching deformation of the elastic portion 31.

It can be understood that the elastic portion 31 needs to abut against the first bracket 10 or the second bracket 20, or both the first bracket 10 and the second bracket 20, so that the balance wheel assembly 100 can convert part of the acting force of the balance wheel 40 on the first bracket 10 into elastic potential energy of the elastic portion 31, and the rest acting force will act on the vehicle body 200 connected to the second bracket 20 through the second bracket 20, so as to achieve the effect of shock absorption. The elastic portion 31 can convert kinetic energy into elastic potential energy by contraction and extension, and is preferably contracted.

By arranging the elastic part 31 to abut against the first bracket 10 and/or the second bracket 20, the elastic part 31 connects the first bracket 10 and the second bracket 20, and part of acting force of the first bracket 10 on the second bracket 20 is offset, so that the damping effect is further improved.

In one embodiment, referring to fig. 1 to 3, the first bracket 10 includes a first main body 11, a first rotating shaft 12, a second rotating shaft 13 and an adjusting lever 14, the first rotating shaft 12 and the second rotating shaft 13 are connected to the first main body 11, the first rotating shaft 12 and the second rotating shaft 13 are parallel to each other and have a distance therebetween, the first rotating shaft 12 is connected to the balance wheel 40, the second rotating shaft 13 is connected to the second bracket 20, the adjusting lever 14 is connected to the first main body 11 and located on a side of the second rotating shaft 13 opposite to the first rotating shaft 12, and the connecting lever 32 is connected to the adjusting lever 14.

Specifically, the first rotating shaft 12 is detachably connected to the first main body 11, the first rotating shaft 12 is fixed to the first main body 11, and the balance wheel 40 is rotatably connected to the first rotating shaft 12, so that the balance wheel 40 is rotatably connected to the first bracket 10. Wherein, a bearing can be arranged between the balance wheel 40 and the first rotating shaft 12 to reduce the friction force. The first rotating shaft 12 may be a bolt, a high-strength bolt is fixedly connected with the first bracket 10, and the balance wheel 40 is rotatably connected with the bolt. The second shaft 13 can be formed by welding the shaft sleeve to the first bracket 10, and the second bracket 20 is rotatably connected to the second shaft 13, without limiting the specific structure of the first shaft 12 and the second shaft 13. The link 32 is movably coupled to the adjustment lever 14 such that the adjustment lever 14 can move in the extending direction of the link 32, thereby adjusting the rotation angle θ of the second bracket 20 with respect to the first bracket 10. Through setting up connecting rod 32 and being connected with the regulation pole 14 of first support 10, connecting rod 32 and first support 10 move and be connected, also can adjust the turned angle theta of second support 20 for first support 10 under connected state for other spare parts need not demolishd to the in-process that the shock attenuation was adjusted, convenient and fast.

The elastic part of the prior balance wheel assembly is generally positioned in the same vertical direction with the balance wheel and the vehicle body so as to buffer vertical impact force, but the impact force buffering effect in the horizontal direction is weaker. Since the balance wheel is generally small in size, the balance wheel assembly receives much horizontal impact force when encountering a protrusion during running, and the shock absorption effect of the conventional balance wheel assembly is further weakened. And the utility model provides a first support 10 and the second support 20 of balance wheel subassembly 100 rotate to be connected, to the better buffering of the impact force homoenergetic of horizontal direction and vertical direction, the shock attenuation effect is better.

In one embodiment, referring to fig. 2 and 4, the second bracket 20 includes a second main body 21 and an adjusting plate 22 connected to the second main body 21, the adjusting plate 22 is located on a side of the second rotating shaft 13 opposite to the first rotating shaft 12 and opposite to the adjusting rod 14, the connecting rod 32 connects the adjusting plate 22 and the adjusting rod 14, and the elastic portion 31 abuts against the adjusting plate 22. Specifically, the elastic portion 31 may abut against two opposite end surfaces of the adjustment plate 22, preferably abut against an end surface of the adjustment plate 22 opposite to the adjustment rod 14, and the adjustment plate 22 may be fixed to the second main body portion 21 by welding. It can be understood that the distance between the adjusting rod 14 and the adjusting plate 22 is adjusted by the adjusting rod 14, when the distance between the adjusting rod 14 and the adjusting plate 22 is shortened, the relative rotation angle θ between the first bracket 10 and the second bracket 20 is increased, the compressible distance of the elastic part 31 is increased, the damping effect is improved, and the elastic part 31 is more easily crushed; when the distance between the adjustment lever 14 and the adjustment plate 22 is increased, the relative rotation angle θ of the first bracket 10 and the second bracket 20 is decreased, the compressible distance of the elastic part 31 is shortened, the shock-absorbing effect is weakened, and the working life of the elastic part 31 is longer. Through setting up regulating plate 22, elastic component 31 and regulating plate 22 butt, elastic component 31 and regulating plate 22's connection is more stable, is favorable to balanced wheel subassembly 100 make full use of elastic component 31 shock attenuation.

In one embodiment, referring to fig. 1 to 4, the adjustment lever 14 has a first connection hole 141, the adjustment plate 22 has a second connection hole 221, the connection rod 32 is disposed through the first connection hole 141 and the second connection hole 221, the elastic portion 31 is disposed on a side of the adjustment plate 22 opposite to the adjustment lever 14, the connection rod 32 includes a first end 321 located on a side of the adjustment plate 22 opposite to the adjustment lever 14, and the first end 321 abuts against the elastic portion 31. Specifically, the first connection hole 141 of the adjustment lever 14 is opened on the outer circumferential surface of the adjustment lever 14. The elastic portion 31 is sleeved on the connecting rod 32. The axes of the first connecting hole 141, the second connecting hole 221 and the connecting rod 32 coincide with each other and are perpendicular to the first rotating shaft 12 and the second rotating shaft 13. It will be appreciated that when the resilient portion 31 is not compressed, the distance from the first end 321 to the adjustment plate 22 is constant; when the elastic portion 31 is compressed, the distance between the first end 321 and the adjustment plate 22 is shortened.

The existing balance wheel assembly has the defects that the elastic part, the balance wheel and the vehicle body are all positioned in the same vertical direction, so that the size of the balance wheel assembly in the vertical direction is large, and the height of the vehicle body is too high, so that the balance wheel assembly cannot be applied to many complicated scenes.

And the utility model provides an one side of adjusting plate 22 regulation pole 14 dorsad is located to balanced wheel subassembly 100's elasticity portion 31, has reduced balanced wheel subassembly 100's vertical ascending size in side, is favorable to balanced wheel subassembly 100's application pluralism.

In one embodiment, referring to fig. 1, the connecting rod 32 further includes a second end 322 opposite to the first end 321, the second end 322 is provided with a locking member 51, the locking member 51 abuts against the adjusting lever 14, and the locking member 51 is located on a side of the adjusting lever 14 opposite to the adjusting plate 22. Specifically, the connecting rod 32 may be a threaded rod, and the locking member 51 may be a nut. The first coupling hole 141 of the adjustment lever 14 may be a screw hole to screw the adjustment lever 14 to the coupling rod 32, and a locking member 51 is provided at a side of the adjustment lever 14 facing away from the adjustment plate 22 to share the axial force applied to the adjustment lever 14. The first coupling hole 141 may be a non-threaded through hole, and a locking member 51 is provided at a side of the adjusting lever 14 facing away from the adjusting plate 22 to adjust a distance between the adjusting lever 14 and the adjusting plate 22. By providing the locking member 51 to be connected to the second end 322 of the connecting rod 32, the connection strength between the adjusting member 30 and the first bracket 10 is ensured, which is advantageous to the stable damping of the balance wheel assembly 100.

In one embodiment, referring to fig. 1 and 3, the first main body 11 includes a first plate 111, a first connecting plate 112, and a second plate 113 connected in sequence, the first plate 111, the first connecting plate 112, and the second plate 113 enclose an accommodating space 102 in an "Contraband" shape, the balance wheel 40 is disposed in the accommodating space 102, the ends of the first plate 111 and the second plate 113 far away from the first connecting plate 112 are both provided with a groove 101, the opening direction of the groove 101 faces away from the second bracket 20, and two ends of the adjusting rod 14 are respectively connected to the first plate 111 and the second plate 113 and are accommodated in the groove 101. Specifically, the first plate 111 and the second plate 113 are symmetrically disposed, and the same position of the first plate 111 and the second plate 113 is perforated to accommodate the first rotating shaft 12. The second plate 113 serves to protect the balance wheel 40 from being damaged. The accommodation space 102 enclosed by the first plate 111, the first connection plate 112 and the second plate 113 may be "Contraband", a "C", a "V", and the like. The groove 101 of the first plate 111 is opposite to the groove 101 of the second plate 113, and the end of the groove 101 is hook-shaped to accommodate two ends of the adjusting rod 14. It can be understood that the adjustment lever 14 is fixed in the groove 101 by the force of the connection rod 32 and the groove 101, and the adjustment lever 14 can be detached from the first bracket 10 only after the connection rod 32 is detached from the adjustment lever 14.

Through setting up first connecting plate 112 in the direction of motion of stabilizer for first support 10 can protect stabilizer 40, is favorable to improving the working life of stabilizer 40, and simultaneously, adjust pole 14 and can dismantle with first support 10 and be connected, the assembly of the stabilizer subassembly 100 of being convenient for.

In one embodiment, referring to fig. 1, 2 and 4, the second main body 21 includes a third plate 211, a second connecting plate 212 and a fourth plate 213 connected in sequence, the adjusting plate 22 is connected to the third plate 211 and the fourth plate 213, the second main body 21 is provided with a limiting rod 23, two ends of the limiting rod 23 in the axial direction are respectively connected to the third plate 211 and the fourth plate 213, and the limiting rod 23 is parallel to the first rotating shaft 12. Specifically, the third plate 211 and the fourth plate 213 are symmetrically disposed, and the same position of the third plate 211 and the fourth plate 213 is opened to receive the limiting rod 23. It will be appreciated that in the absence of an impact force, no load, the spacing rod 23 is not in contact with the first bracket 10 and is spaced a distance apart. The stopper 23 can be formed by connecting both ends of the bolt with the third plate 211 and the fourth plate 213, respectively, and is easy to assemble and disassemble. When the balance wheel assembly 100 bears a load and receives an impact force, the relative rotation angle θ between the first bracket 10 and the second bracket 20 is reduced, the spacing distance between the limiting rod 23 and the first bracket 10 is reduced, and when the relative rotation angle θ is reduced to 0, the limiting rod 23 contacts the first bracket 10, and the relative rotation angle θ cannot be reduced any more. When the gag lever post 23 comes into contact with the second bracket 20, the resilient portion 31 is no longer compressed and the gag lever post 23 begins to take on part of the load and impact force. By arranging the limiting rod 23 between the second connecting plate 212 and the first bracket 10, the range of the relative rotation angle theta between the second bracket 20 and the first bracket 10 is limited, and the elastic part 31 is prevented from being excessively adjusted.

In one embodiment, referring to fig. 1, fig. 4 and fig. 5, the second main body 21 further includes a pin 24, the pin 24 is disposed on a side of the second connecting plate 212 facing away from the first rotating shaft 12, and the pin 24 is used for connecting with the vehicle body 200. Specifically, the car body 200 is sleeved on the pin shaft 24, and the car body 200 is clamped and fixed on the pin shaft 24 through the fixing cushion block. Through setting up round pin axle 24, second support 20 is connected with automobile body 200 through round pin axle 24, and automobile body 200 can dismantle with balance wheel subassembly 100 and be connected, the dismouting of whole car of being convenient for.

The utility model also provides a pallet truck 1000, please refer to fig. 5, and fig. 5 is a schematic structural diagram of pallet truck 1000. The pallet truck 1000 comprises a truck body 200 and the balance wheel assembly 100 provided by the utility model, wherein the truck body 200 is connected with the balance wheel assembly 100. Specifically, the vehicle body 200 and the balance wheel assembly 100 may be connected in a rotating manner or in a fixed manner. Through adding in pallet truck 1000 the utility model provides a balance wheel subassembly 100, pallet truck 1000 have better shock attenuation effect, and the shock attenuation is adjusted and need not to dismantle convenient and fast.

While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.

Claims

1. A balance wheel assembly is characterized by comprising a first support, a second support, an adjusting piece and a balance wheel, wherein the first support is in rotating connection with the balance wheel, the second support is in rotating connection with the first support and is used for being connected to a vehicle body, the adjusting piece is connected with the first support and the second support, and the adjusting piece is used for adjusting the rotating angle of the second support relative to the first support.

2. The balance wheel assembly according to claim 1, wherein the adjusting member includes an elastic portion and a connecting rod, the connecting rod movably connects the first bracket and the second bracket, the elastic portion is fitted over the connecting rod, the elastic portion abuts against the first bracket and/or the second bracket, and the elastic portion is extended and contracted in an extending direction of the connecting rod.

3. The balance wheel assembly of claim 2, wherein the first bracket comprises a first main body, a first rotating shaft, a second rotating shaft, and an adjusting rod, the first rotating shaft and the second rotating shaft are connected to the first main body, the first rotating shaft and the second rotating shaft are parallel to each other and have a spacing distance, the first rotating shaft is connected to the balance wheel, the second rotating shaft is connected to the second bracket, the adjusting rod is connected to the first main body and is located on a side of the second rotating shaft opposite to the first rotating shaft, and the connecting rod is connected to the adjusting rod.

4. The balance wheel assembly of claim 3, wherein the second bracket includes a second main body portion and an adjustment plate coupled to the second main body portion, the adjustment plate being located on a side of the second rotating shaft opposite to the first rotating shaft and being disposed opposite to the adjustment rod, the connection rod connecting the adjustment plate and the adjustment rod, the elastic portion abutting against the adjustment plate.

5. The balance wheel assembly of claim 4, wherein the adjustment rod is provided with a first connection hole, the adjustment plate is provided with a second connection hole, the connection rod is inserted through the first connection hole and the second connection hole, the elastic portion is provided on a side of the adjustment plate facing away from the adjustment rod, the connection rod includes a first end located on a side of the adjustment plate facing away from the adjustment rod, and the first end abuts against the elastic portion.

6. The balance wheel assembly of claim 5, wherein the connecting rod further comprises a second end opposite the first end, the second end being provided with a retaining member, the retaining member abutting the adjustment rod, and the retaining member being located on a side of the adjustment rod facing away from the adjustment plate.

7. The balance wheel assembly of claim 3, wherein the first main body portion comprises a first plate, a first connecting plate and a second plate which are connected in sequence, the first plate, the first connecting plate and the second plate enclose a containing space in the shape of "Contraband", the balance wheel is arranged in the containing space, the ends of the first plate and the second plate, which are far away from the first connecting plate, are provided with grooves, the opening directions of the grooves are opposite to the second bracket, and two ends of the adjusting rod are respectively connected with the first plate and the second plate and are contained in the grooves.

8. The balance wheel assembly according to claim 4, wherein the second main body portion includes a third plate, a second connecting plate, and a fourth plate connected in this order, the adjustment plate is connected to the third plate and the fourth plate, the second main body portion is provided with a stopper rod, both ends of the stopper rod in the axial direction are connected to the third plate and the fourth plate, respectively, and the stopper rod is parallel to the first rotating shaft.

9. The balance wheel assembly of claim 8, wherein the second body portion further comprises a pin disposed on a side of the second connecting plate facing away from the first axis of rotation, the pin configured to couple to the vehicle body.

10. A pallet truck comprising a truck body and a balance wheel assembly as claimed in any one of claims 1 to 9, the truck body being connected to the balance wheel assembly.