Rear counterweight tray and hoisting equipment

Abstract

The utility model relates to the technical field of hoisting, and provides a rear counterweight tray and hoisting equipment. The rear balance weight tray comprises a tray body, a sleeve and at least one limiting assembly, the sleeve is arranged on the upper portion of the tray body, a tray lifting lug is arranged at the upper end of the sleeve, and the tray lifting lug is provided with a pin shaft hole for the pin shaft to pass through. The limiting assemblies are arranged on one sides of the corresponding tray lifting lugs. The limiting assembly is arranged on one side of the tray lifting lug, under the condition that the pin shaft penetrates through the pin shaft hole and abuts against the upper edge of the pin shaft hole, the limiting assembly is matched with the limiting groove of the pin shaft in a clamped mode, and therefore secondary protection on the pin shaft is achieved; due to the fact that the limiting assembly completes secondary protection and protection relieving on the pin shaft through necessary lifting and descending of the oil cylinder on the rear balance weight in the rear balance weight assembling process, the operation frequency of workers in the process of completing the self-loading and unloading action of the rear balance weight is reduced, the safety risk is reduced, and the installation mode is simplified.

Description

Technical Field

[0001] The utility model relates to the technical field of lifting, in particular to a rear counterweight tray and lifting equipment. Background Art

[0002] At present, during the self-loading and unloading process of the rear counterweight by using the oil cylinder, after the rear counterweight is in place, the pin cylinder usually drives out the pin to position the rear counterweight. On this basis, in order to prevent the oil cylinder from retracting due to unexpected circumstances, we will choose to drill a hole on the pin and manually install a pin pin / ring pin to provide a secondary limit protection for the pin to prevent the pin from retracting and causing the rear counterweight to fall.

[0003] During the installation of the pin pin / ring pin, on-site operators are required to directly climb up or use a ladder to climb onto the rear counterweight for installation operations. During this operation, the pin shaft is only prevented from shrinking by the friction caused by the contact with the rear counterweight. In addition, when the vehicle is equipped with dual winch motors, the pin shaft close to the cover side will be difficult to install due to the presence of the winch reducer and hydraulic pipeline. Utility Model Content

[0004] The utility model provides a rear counterweight tray, which is used to solve the problems of high risk and inconvenience in installation process of the existing pin shaft secondary limit protection structure.

[0005] The utility model provides a rear counterweight tray, comprising:

[0006] Tray body;

[0007] A sleeve is arranged on the upper part of the tray body, the upper end of the sleeve is provided with a tray lifting ear, and the tray lifting ear is provided with a pin shaft hole for the pin shaft to pass through;

[0008] At least one limiting assembly is arranged on one side of the corresponding pallet lifting ear; when the pin shaft passes through the pin shaft hole and abuts against the upper edge of the pin shaft hole, the limiting assembly is snap-fitted with the limiting groove of the pin shaft.

[0009] According to a rear counterweight tray provided by the utility model, the limiting assembly includes:

[0010] A limit card plate, wherein a lower edge of the limit card plate is provided with a card slot with an opening facing downwards, and the card slot is used for carding and cooperating with the limit slot.

[0011] According to a rear counterweight tray provided by the utility model, the limiting assembly also includes:

[0012] A rotating shaft connected to the upper end of the sleeve, wherein the limit clamping plate is rotatably matched with the rotating shaft;

[0013] An elastic member is sleeved on the rotating shaft, and the elastic member is respectively connected to the limit clamping plate and the rotating shaft.

[0014] According to a rear counterweight tray provided by the utility model, the width of the slot gradually increases from top to bottom.

[0015] According to a rear counterweight tray provided by the utility model, the width of the pin shaft hole gradually increases from top to bottom.

[0016] According to a rear counterweight tray provided by the utility model, the rear counterweight tray includes two sleeves, and the two sleeves are symmetrically arranged.

[0017] According to a rear counterweight pallet provided by the utility model, the rear counterweight pallet includes four limit assemblies, and the limit assemblies are arranged on the side of the corresponding pallet lifting ears away from the pin shaft cylinder.

[0018] According to a rear counterweight tray provided by the utility model, a guiding inclined surface is arranged on the outer peripheral surface of the pin shaft insertion end.

[0019] According to a rear counterweight tray provided by the utility model, the thickness of the limiting clamping plate is smaller than the width of the limiting groove.

[0020] The utility model also provides a lifting device, comprising a lifting device body and any one of the above-mentioned rear counterweight trays, wherein the rear counterweight tray is arranged on the lifting device body.

[0021] The rear counterweight pallet provided by the utility model is provided with a limit assembly on one side of the pallet lifting ear. When the pin shaft passes through the pin shaft hole and abuts against the upper edge of the pin shaft hole, the limit assembly and the limit groove of the pin shaft are engaged and cooperated, thereby realizing secondary protection of the pin shaft. Since the limit assembly utilizes the necessary lifting and lowering of the rear counterweight by the cylinder during the assembly of the rear counterweight to complete the secondary protection and release of the protection of the pin shaft, the number of operations of personnel when completing the self-loading and unloading action of the counterweight is reduced, the safety risk is reduced, and the installation method is simplified. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 It is a schematic diagram of the connection relationship between the sleeve and the limit assembly provided by the utility model;

[0024] Figure 2 It is a three-dimensional structural schematic diagram of the rear counterweight tray provided by the utility model after the counterweight block is installed;

[0025] Figure 3 It is a structural schematic diagram of the rear counterweight tray provided by the utility model;

[0026] Figure 4 This is a schematic diagram of the main structure of the rear counterweight tray provided by the utility model after the counterweight block is installed;

[0027] Figure 5 yes Figure 4 A schematic diagram of the local enlarged structure at C in the middle;

[0028] Figure 6 It is a side view structural schematic diagram of the rear counterweight tray provided by the utility model after the counterweight block is installed;

[0029] Figure 7 yes Figure 6 A schematic diagram of the local enlarged structure at D in the middle;

[0030] Figure 8 It is a schematic diagram of the connection relationship between the limit assembly and the pin provided in another embodiment of the utility model.

[0031] Reference numerals:

[0032] 10. Pallet body; 20. Sleeve; 21. Pallet lifting ear; 22. Pin shaft hole; 23. Limiting slot; 30. Limiting assembly; 31. Limiting clamping plate; 32. Clamping slot; 33. Rotating shaft; 34. Reinforcing plate; 40. Pin shaft; 41. Guide slope; 42. Counterweight lifting ear; 50. Counterweight block. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be described clearly and completely in conjunction with the drawings in the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0034] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limitations on the embodiments of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0035] Combine the following Figures 1 to 8 The specific structure of the rear counterweight tray of the utility model is described.

[0036] like Figures 1 to 6 As shown, the rear counterweight pallet includes a pallet body 10, a sleeve 20 and at least one stopper assembly 30. The sleeve 20 is disposed on the upper part of the pallet body 10. The upper end of the sleeve 20 is provided with a pallet ear 21. The pallet ear 21 is provided with a pin hole 22 for passing a pin 40. The stopper assembly 30 is disposed on one side of the corresponding pallet ear 21. When the pin 40 passes through the pin hole 22 and abuts against the upper edge of the pin hole 22, the stopper assembly 30 is engaged with the stopper groove 23 of the pin 40.

[0037] The rear counterweight pallet provided by the utility model is provided with a limit assembly 30 on one side of the pallet lifting ear 21. When the pin shaft 40 passes through the pin shaft hole 22 and abuts against the upper edge of the pin shaft hole 22, the limit assembly 30 is engaged with the limit groove 23 of the pin shaft 40, thereby realizing secondary protection of the pin shaft 40. Since the limit assembly 30 utilizes the necessary lifting and lowering of the rear counterweight by the cylinder during the assembly of the rear counterweight to complete the secondary protection and release of the protection of the pin shaft 40, the number of operations of personnel when completing the self-loading and unloading action of the counterweight is reduced, the safety risk is reduced, and the installation method is simplified.

[0038] In one embodiment of the present invention, tray lifting ears 21 are provided on both sides of the upper end of the sleeve 20 , and the tray lifting ears 21 on both sides of the sleeve 20 are arranged symmetrically.

[0039] In one embodiment of the present invention, the tray body 10 is in the shape of a rectangular parallelepiped. The tray body 10 is used to carry the counterweight 50 , and the tray body 10 is used to provide an installation base for the sleeve 20 .

[0040] In one embodiment of the present invention, Figure 2 and Figure 3As shown, the rear counterweight tray includes two sleeves 20, which are arranged at intervals along the length direction of the tray body 10, and the two sleeves 20 are symmetrically arranged. The distances between the two sleeves 20 and the two short sides of the tray body 10 are equal, and the distances between the two sleeves 20 and the two long sides of the tray body 10 are also equal.

[0041] The sleeve 20 is a tubular structure with a hollow interior. The cross section of the sleeve 20 is rectangular, but the cross section of the sleeve 20 is not limited thereto, and may also be circular, elliptical or other shapes. The cross section area of ​​the sleeve 20 is smaller than the cross section area of ​​the through hole of the counterweight 50, so that the sleeve 20 can be sleeved in the through hole of the counterweight 50. The lower end of the sleeve 20 is welded to the tray body 10. Of course, the connection method between the sleeve 20 and the tray body 10 is not limited to welding, and may also be connected by bolting or other connection methods.

[0042] In a preferred embodiment of the present invention, in order to facilitate lifting and use, other lifting ears are provided on both sides of the upper end of the sleeve 20, and the limiting clamping plate 31 is located between the pallet lifting ear 21 and the other lifting ears.

[0043] In one embodiment of the present invention, Figure 2 , Figure 3 and Figure 7 As shown, the limiting assembly 30 includes a limiting clamping plate 31, which is connected to the side wall of the upper end of the sleeve 20. The lower edge of the limiting clamping plate 31 is provided with a clamping groove 32 with an opening facing downward, and the clamping groove 32 is used to engage with the limiting groove 23.

[0044] In one embodiment of the present invention, Figure 2 , Figure 3 and Figure 7 As shown, one end of the limit clamping plate 31 is welded to the side wall of the upper end of the sleeve 20. Of course, it can also be connected by bolts or other methods. The clamping groove 32 is located at the lower edge of the limit clamping plate 31 away from the end of the sleeve 20, and the distance between the clamping groove 32 and the sleeve 20 is equal to the distance between the pin 40 and the sleeve 20.

[0045] In a preferred embodiment of the present invention, Figure 7 As shown, the width of the limiting clamp plate 31 gradually increases in the direction approaching the sleeve 20 , which increases the width of the limiting clamp plate 31 near one end of the sleeve 20 , increases the welding area between the limiting clamp plate 31 and the sleeve 20 , and enhances the stability of the limiting clamp plate 31 .

[0046] In a preferred embodiment of the present invention, Figure 2 and Figure 3As shown, a reinforcing plate 34 is provided on the side of the limiting card plate 31 away from the pallet lifting ear 21. The reinforcing plate 34 is in a strip shape and is arranged along the length direction of the limiting card plate 31. The reinforcing plate 34 is perpendicular to the limiting card plate 31. The reinforcing plate 34 is welded to the limiting card plate 31 or is integrally formed. The reinforcement plate 34 can enhance the structural strength of the limiting card plate 31.

[0047] In a preferred embodiment of the present invention, the limit plate 31 is arranged parallel to the pallet ear 21, and the distance between the limit plate 31 and the pallet ear 21 is greater than the thickness of the counterweight ear 42 to ensure that after the pallet body 10 rises, the counterweight ear 42 can enter between the limit plate 31 and the pallet ear 21.

[0048] In a preferred embodiment of the present invention, Figure 5 As shown, the thickness of the limiting clamping plate 31 is smaller than the width of the limiting groove 23, so as to reduce the precision requirement on the pin shaft 40 in the axial direction and facilitate operation.

[0049] In a preferred embodiment of the present invention, Figure 7 As shown, the width of the slot 32 increases gradually from top to bottom. After the pin shaft 40 is driven out by the pin shaft oil cylinder, the pin shaft 40 may not be completely aligned with the center of the slot 32 every time. Therefore, by gradually increasing the width of the slot 32 from top to bottom, the pin shaft 40 can easily enter the slot 32. After the pin shaft 40 enters the top of the slot 32, the width of the slot 32 decreases, thereby playing a good role in limiting the pin shaft 40.

[0050] Furthermore, the edge of the opening of the slot 32 is an arc surface, which can guide the pin 40. Even if the top of the pin 40 abuts against the arc surface, the pin 40 can automatically slide into the slot 32 under the gravity of the counterweight. Figure 1 The B position in the.

[0051] In a preferred embodiment of the present invention, Figure 1 and Figure 7 As shown, the width of the pin hole 22 gradually increases from top to bottom, that is, the width of the lower part of the pin hole 22 is greater than the width of the upper part of the pin hole 22. In the design process of the pallet lifting ear 21, in order to avoid processing errors and facilitate on-site operation to install the pin 40, the width of the lower part of the pin hole 22 is set larger. Even if the pin 40 is at position A deviating from the center of the pin hole 22, it can still enter the pin hole 22, which reduces the difficulty of operation during installation. During the installation of the rear counterweight, after the cylinder lifts the rear counterweight, due to the large margin of the pin hole 22, the pin 40 can easily enter the pin hole 22, shortening the assembly time.

[0052] In a preferred embodiment of the present invention, Figure 2 and Figure 3 As shown, the rear counterweight tray includes four limit assemblies 30, which are arranged on the side of the corresponding tray lifting ear 21 away from the pin cylinder. Specifically, two limit assemblies 30 are arranged on the front and rear sides of the left sleeve 20, and the limit assemblies 30 are located on the side of the tray lifting ear 21 away from the pin cylinder, that is, the limit assemblies 30 are located on the left side of the tray lifting ear 21. The other two limit assemblies 30 are arranged on the front and rear sides of the right sleeve 20, and the limit assemblies 30 are located on the side of the tray lifting ear 21 away from the pin cylinder, that is, the limit assemblies 30 are located on the right side of the tray lifting ear 21.

[0053] Combine the following Figures 1 to 7 Describe a specific embodiment of the utility model, such as Figures 1 to 7 As shown, the rear counterweight pallet includes a pallet body 10 , two sleeves 20 and four limit assemblies 30 . The pallet body 10 is a rectangular parallelepiped, and the top of the pallet body 10 is a plane to provide a position for carrying the counterweight block 50 .

[0054] The two sleeves 20 are arranged at intervals along the length direction of the tray body 10, and the two sleeves 20 are symmetrically arranged. The distances between the two sleeves 20 and the two short sides of the tray body 10 are equal, and the distances between the two sleeves 20 and the two long sides of the tray body 10 are also equal. The sleeve 20 is a hollow tubular structure, and the cross section of the sleeve 20 is rectangular. The four corners of the sleeve 20 are rounded, and the cross-sectional area of ​​the sleeve 20 is smaller than the cross-sectional area of ​​the through hole of the counterweight block 50, so that the sleeve 20 can be sleeved in the through hole of the counterweight block 50, and the lower end of the sleeve 20 is welded to the tray body 10.

[0055] Both sides of the upper end of each sleeve 20 are provided with a pallet lifting ear 21, and the pallet lifting ear 21 is provided with a pin hole 22 for the pin shaft 40 to pass through, and the width of the pin hole 22 gradually increases from top to bottom. Two of the four limiting assemblies 30 are provided on the front and rear sides of the left sleeve 20, and the limiting assemblies 30 are located on the left side of the pallet lifting ear 21. The other two limiting assemblies 30 are provided on the front and rear sides of the right sleeve 20, and the limiting assemblies 30 are located on the right side of the pallet lifting ear 21.

[0056] The limiting assembly 30 includes a limiting clamping plate 31, which is welded to the side wall of the upper end of the sleeve 20. The lower edge of the limiting clamping plate 31 is provided with a clamping groove 32 with an opening facing downward, and the clamping groove 32 is used to engage with the limiting groove 23. The clamping groove 32 is located at the lower edge of the limiting clamping plate 31 away from the sleeve 20, and the distance between the clamping groove 32 and the sleeve 20 is equal to the distance between the pin 40 and the sleeve 20.

[0057] The width of the limiting card plate 31 gradually increases in the direction close to the sleeve 20, so that the width of one end of the limiting card plate 31 is increased, the welding area between the limiting card plate 31 and the sleeve 20 is increased, and the stability of the limiting card plate 31 is enhanced. A reinforcing plate 34 is arranged on the side of the limiting card plate 31 away from the pallet lifting ear 21. The reinforcing plate 34 is in a strip shape and arranged along the length direction of the limiting card plate 31. The reinforcing plate 34 is perpendicular to the limiting card plate 31 and is welded to the limiting card plate 31. The limiting card plate 31 is arranged parallel to the pallet lifting ear 21, and the distance between the limiting card plate 31 and the pallet lifting ear 21 is greater than the thickness of the counterweight lifting ear 42, so as to ensure that after the pallet body 10 rises, the counterweight lifting ear 42 can enter between the limiting card plate 31 and the pallet lifting ear 21. The thickness of the limiting card plate 31 is less than the width of the limiting groove 23, so as to reduce the precision requirement on the pin shaft 40 in the axial direction and facilitate operation.

[0058] The width of the slot 32 increases gradually from top to bottom. The edge of the opening of the slot 32 is an arc-shaped surface, which can guide the pin 40.

[0059] How to use the rear weight tray:

[0060] The oil cylinder is used to lift the pallet body 10 and the counterweight 50 to a predetermined height, the pin cylinder pushes out the pin 40, and the insertion end of the pin 40 is inserted into the pin hole 22. At this time, the pin 40 is at the lower part of the pin hole 22. The oil cylinder is then controlled to lower the height of the pallet body 10 and the counterweight 50, so that the top of the pin 40 abuts against the upper edge of the pin hole 22, so that the counterweight is loaded onto the pin 40. At this time, the slot 32 is engaged with the limit slot 23 to prevent the pin cylinder from retracting.

[0061] During the process of disassembling the rear counterweight suspended by the pin 40, the oil cylinder is first used to lift the pallet body 10 and the counterweight 50 to a predetermined height so that the upper edge of the pin hole 22 is separated from the pin 40, and at the same time, the limiting clamping plate 31 is separated from the limiting groove 23 of the pin 40, the pin 40 is retracted, and the protection of the pin 40 is released.

[0062] Combine the following Figure 8 Describe another specific embodiment of the utility model, such as Figure 8As shown, the rear counterweight tray includes a tray body 10, two sleeves 20 and four limit assemblies 30. In this embodiment, the structures of the tray body 10, the sleeve 20 and the limit card plate 31 are the same, and will not be described in detail here. The difference between this embodiment and the above embodiment is that the limit assembly 30 also includes a rotating shaft 33 and an elastic member (not shown). The rotating shaft 33 is connected to the upper end of the sleeve 20, and the limit card plate 31 is rotatably matched with the rotating shaft 33. The elastic member is a torsion spring or other elastic limit mechanism. The torsion spring is sleeved on the rotating shaft 33, and the torsion spring is respectively connected to the limit card plate 31 and the rotating shaft 33. In addition, in this embodiment, the outer peripheral surface of the insertion end of the pin shaft 40 is provided with a guide inclined surface 41. The specific structural form of the guide inclined surface 41 can be a chamfered surface or a rounded surface. The guide inclined surface 41 can guide the pin shaft 40, reduce the precision requirements of the pin shaft 40 in the up and down directions, so that the pin shaft 40 can be inserted into the limit groove 23 even if it deviates from the predetermined height, which is convenient for operation.

[0063] How to use the rear weight tray:

[0064] The oil cylinder is used to lift the pallet body 10 and the counterweight 50 to a predetermined height, the pin cylinder pushes out the pin 40, and the insertion end of the pin 40 is inserted into the pin hole 22. At this time, the pin 40 is at the lower part of the pin hole 22. The oil cylinder is then controlled to lower the height of the pallet body 10 and the counterweight 50, so that the top of the pin 40 abuts against the upper edge of the pin hole 22, so that the counterweight is loaded to the pin 40. At this time, the slot 32 is engaged with the limit slot 23, the height of the limit card plate 31 rises a certain distance, and the torsion spring is deformed, so that the limit card plate 31 fits tightly against the bottom wall of the limit slot 23.

[0065] During the process of disassembling the rear counterweight suspended by the pin 40, the oil cylinder is first used to lift the pallet body 10 and the counterweight 50 to a predetermined height, so that the upper edge of the pin hole 22 is separated from the pin 40, and at the same time, the limiting clamp 31 is separated from the limiting groove 23 of the pin 40, the pin 40 is retracted, and the pin 40 is released from protection. At this time, the torsion spring returns to its initial state, and the height of the limiting clamp 31 is reduced to its initial position.

[0066] Compared with the use of a fixed limit card plate 31, the limit assembly 30 in this embodiment adds elastic damping. If the lifting error of the self-loading and unloading cylinder causes the lifting height of the rear counterweight to be unable to be controlled within a certain height, the limit card plate 31 can be lifted up by the guide slope 41 when the pin shaft 40 in this embodiment is extended. When the pin shaft 40 is extended into place, the limit card plate 31 is reset under the elastic force of the torsion spring and falls into the limit groove 23 of the pin shaft 40.

[0067] The utility model also provides a lifting device, which comprises a lifting device body and the rear counterweight tray described in any one of the above embodiments, wherein the rear counterweight tray is arranged on the lifting device body.

[0068] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A rear counterweight tray, characterized in that: include: Tray body (10); A sleeve (20) is arranged on the upper part of the tray body (10), the upper end of the sleeve (20) is provided with a tray lifting ear (21), and the tray lifting ear (21) is provided with a pin hole (22) for allowing a pin (40) to pass through; At least one limiting assembly (30) is arranged on one side of the corresponding pallet lifting ear (21); when the pin shaft (40) passes through the pin shaft hole (22) and abuts against the upper edge of the pin shaft hole (22), the limiting assembly (30) is snap-fitted with the limiting groove (23) of the pin shaft (40).

2. The rear counterweight tray according to claim 1, characterized in that: The limiting component (30) comprises: A limit clamping plate (31), wherein a lower edge of the limit clamping plate (31) is provided with a clamping slot (32) with an opening facing downwards, and the clamping slot (32) is used for clamping and cooperating with the limit slot (23).

3. The rear counterweight tray according to claim 2, characterized in that: The limiting component (30) further comprises: A rotating shaft (33) is connected to the upper end of the sleeve (20), and the limiting clamping plate (31) is rotatably matched with the rotating shaft (33); An elastic member is sleeved on the rotating shaft (33), and the elastic member is respectively connected to the limiting clamping plate (31) and the rotating shaft (33).

4. The rear counterweight tray according to claim 2, characterized in that: The width of the card slot (32) gradually increases from top to bottom.

5. The rear counterweight tray according to any one of claims 1 to 4, characterized in that: The width of the pin shaft hole (22) gradually increases from top to bottom.

6. The rear counterweight tray according to any one of claims 1 to 4, characterized in that: The rear counterweight tray comprises two sleeves (20), and the two sleeves (20) are symmetrically arranged.

7. The rear counterweight tray according to any one of claims 1 to 4, characterized in that: The rear counterweight tray comprises four limit assemblies (30), and the limit assemblies (30) are arranged on the side of the corresponding tray lifting ear (21) away from the pin shaft cylinder.

8. The rear counterweight tray according to any one of claims 1 to 4, characterized in that: The outer peripheral surface of the insertion end of the pin shaft (40) is provided with a guiding inclined surface (41).

9. The rear counterweight tray according to any one of claims 2 to 4, characterized in that: The thickness of the limiting clamping plate (31) is smaller than the width of the limiting groove (23).

10. A lifting device, characterized in that: The invention comprises a lifting equipment body and the rear counterweight tray according to any one of claims 1 to 9, wherein the rear counterweight tray is arranged on the lifting equipment body.

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