Lifting automatic clamping traction accessory and tractor

Abstract

The utility model discloses a lifting automatic clamping traction accessory which aims at lifting one end of a cargo vehicle, clamping the cargo vehicle, pulling the cargo vehicle, pushing the cargo vehicle and moving the cargo vehicle more stably. Meanwhile, the utility model provides a tractor. According to the technical scheme, the lifting automatic clamping traction accessory comprises a lifting frame and a driving module for driving the lifting frame to move up and down, and further comprises a floating frame, the floating frame is in up-down sliding fit with the lifting frame, a clamping hook frame and an air spring are arranged on the floating frame, and the clamping hook frame is in horizontal sliding fit with the floating frame. The air spring is connected with the floating frame and the clamping hook frame; a chain is connected between the lifting frame and the clamping hook frame, a fixed pulley is arranged on the floating frame, and the chain bypasses the fixed pulley to support the fixed pulley.

Description

Technical Field

[0001] The utility model belongs to the technical field of electric tractors, and more specifically relates to a lifting automatic clamping traction attachment and a tractor. Background Art

[0002] At present, cargo carts are widely used in production workshops, warehouses and express sorting yards for storing and circulating goods. Cargo carts include cargo cage carts and non-powered flatbed material carts. Cargo carts are equipped with casters for workers to push and move them. However, the efficiency of manpower pushing and moving is relatively low and does not meet the needs of production development. Therefore, in production workshops, warehouses and express sorting yards, an electric tractor is needed that can both tow and push cargo carts.

[0003] For example, CN210237001U discloses an electric tractor, comprising a stacker body, a lifting frame and a connecting arm; the lifting frame is slidably connected to one side of the stacker body, the connecting arm is arranged between two pins of the stacker body, and one end of the connecting arm is connected to the lifting frame, and the other end of the connecting arm is connected to a hook column;

[0004] The traction accessories of the above-mentioned tractor include a lifting frame, a connecting arm and a hook column, which relies on the hook column to hook the cargo vehicle, and then uses the lifting frame to lift the hook column, thereby lifting part of the casters of the cargo vehicle to achieve traction; however, in this structure, since the cargo vehicle is only hooked and not completely fixed, the cargo vehicle is prone to shaking during traction, affecting traction, and the cargo vehicle cannot be pushed and moved. Utility Model Content

[0005] The main purpose of the utility model is to provide a lifting automatic clamping and traction attachment, which aims to clamp the cargo vehicle while lifting one end of the cargo vehicle, so that the cargo vehicle can be towed or pushed, and the cargo vehicle is more stable when moved; at the same time, a tractor is provided.

[0006] According to the first aspect of the utility model, there is provided a lifting automatic clamping traction attachment, comprising a lifting frame and a driving module for driving the lifting frame to move up and down, and also comprising a floating frame, the floating frame and the lifting frame slide together up and down, a clamping hook frame and a gas spring are arranged on the floating frame, the clamping hook frame and the floating frame slide together horizontally, and the gas spring connects the floating frame and the clamping hook frame;

[0007] A chain is connected between the lifting frame and the clamping hook frame, a fixed pulley is arranged on the floating frame, and the chain passes around the fixed pulley to support the fixed pulley.

[0008] In the above-mentioned lifting automatic clamping and traction attachment, the floating frame includes two main boards arranged at intervals in the horizontal direction, a reinforcing plate connecting the two main boards, and a first sleeve is fixed between the lower ends of the two main boards;

[0009] The clamping hook frame comprises a second sleeve, the second sleeve is inserted into the first sleeve, and an end of the second sleeve away from the first sleeve is provided with a hooking portion;

[0010] The gas spring is inserted into the first sleeve and the second sleeve.

[0011] In the above-mentioned lifting automatic clamping and traction attachment, the number of the hooking parts is two and they are symmetrically arranged on both sides of the second sleeve along its sliding direction.

[0012] In the above-mentioned lifting automatic clamping and traction attachment, a hook pad is provided at one end of the first sleeve close to the hooking portion, the hook pad is flush with the top of the first sleeve, and the hook pad is located between the two hooking portions.

[0013] In the above-mentioned lifting automatic clamping and traction attachment, a frame baffle is provided at one end of the main board close to the hooking portion, and the frame baffle is located above the first sleeve and opposite to the hooking portion.

[0014] In the above-mentioned lifting automatic clamping and traction attachment, there are two chains and they are symmetrically arranged along the sliding direction of the second sleeve; the fixed pulley is arranged on the side of the main board away from the other main board.

[0015] In the above-mentioned lifting automatic clamping and traction attachment, a first guide rail corresponding to the main board is fixed on the lifting frame, and a first guide wheel is provided on the main board, and the first guide wheel cooperates with the first guide rail.

[0016] In the above-mentioned lifting automatic clamping and traction attachment, the tops of the two first guide rails are connected to limit plates, and the main board is located below the limit plates.

[0017] According to a second aspect of the utility model, a tractor is provided, comprising a vehicle body, the vehicle body comprising a chassis, two legs are arranged on the chassis at intervals, a running wheel is arranged at one end of the legs away from the chassis, a driving wheel is arranged at the bottom of the chassis, and a power unit for supplying energy to a driving module and a driving wheel respectively is arranged in the chassis,

[0018] The vehicle body is provided with a lifting automatic clamping and traction attachment as described in the first aspect, the lifting frame is arranged on a side of the chassis close to the support legs, the lifting frame and the chassis slide up and down, the driving module is arranged on the chassis, and the floating frame and the clamping hook frame are both located between the two support legs.

[0019] In the above-mentioned tractor, a guard arm is detachably mounted on the chassis, an elastic band is provided on the guard arm, and a hook is connected to the elastic band.

[0020] One of the above technical solutions of the utility model has at least one of the following advantages or beneficial effects:

[0021] In the utility model, a floating frame is arranged on the lifting frame, and a clamping hook frame is arranged on the floating frame, and a gas spring is used to support the clamping hook frame so that the clamping hook frame is kept in an extended state; when in use, the clamping hook frame is located below the cargo vehicle, and the thrust of the gas spring is slightly greater than the sum of the gravity of the floating frame, the clamping hook frame and the gas spring, so that as the lifting frame rises, the chain can pull the floating frame and the clamping hook frame to rise together, and at this time the gas spring can keep the clamping hook frame from retracting; until the clamping hook frame touches the cargo vehicle, at this time the tension of the chain will increase part of the cargo vehicle The gravity exceeds the sum of the gravity of the floating frame, the clamping hook frame and the gas spring, and also exceeds the thrust of the gas spring. Therefore, the floating frame stops rising, while the lifting frame continues to rise to pull the clamping hook frame to move, so that the clamping hook frame retracts and clamps the cargo cart between the floating frame and the clamping hook frame. After that, the gas spring cannot continue to retract, and the chain can drive the floating frame, the clamping hook frame and the cargo cart to rise together, thereby clamping the cargo cart while lifting one end of the cargo cart. At this time, the cargo cart can be towed or pushed to move, and the cargo cart moves more smoothly. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The utility model is further described below in conjunction with the accompanying drawings and embodiments;

[0023] Figure 1 It is a schematic diagram of the structure of Embodiment 1 of the present utility model;

[0024] Figure 2 It is a left side view of the embodiment 1 of the utility model;

[0025] Figure 3 It is a structural exploded view of Embodiment 1 of the present utility model;

[0026] Figure 4 It is a structural schematic diagram of Embodiment 2 of the present utility model;

[0027] Figure 5 It is another structural schematic diagram of Embodiment 2 of the present utility model;

[0028] Figure 6 This is a structural exploded view of Example 2 of the utility model after removing the arm guard;

[0029] Figure 7 This is a schematic diagram of the utility model embodiment 2 when towing a cargo cage vehicle;

[0030] Figure 8It is a schematic diagram of Example 2 of the utility model when towing an unpowered flatbed material vehicle.

[0031] Among them, the reference numerals of the figures are:

[0032] 1. Lifting frame; 11. First guide rail; 12. Limiting plate; 13. Second guide wheel; 2. Driving module; 3. Floating frame; 31. Main board; 32. Reinforcement plate; 33. First sleeve; 34. Hook pad; 35. Frame baffle; 36. First guide wheel; 4. Clamping hook frame; 41. Second sleeve; 42. Hooking part; 5. Gas spring; 6. Chain; 7. Fixed pulley; 8. Car body; 81. Chassis; 811. Second guide rail; 82. Outrigger; 83. Travel wheel; 84. Driving wheel; 85. Universal wheel; 86. Operating handle; 87. Arm guard; 88. Elastic belt; 89. Hook. DETAILED DESCRIPTION

[0033] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions from beginning to end. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0034] The following disclosure provides many different embodiments or examples for implementing different solutions of the present invention.

[0035] Example 1

[0036] Reference Figures 1 to 3 As shown, a lifting automatic clamping and traction attachment includes a lifting frame 1 and a driving module 2 for driving the lifting frame 1 to move up and down, and also includes a floating frame 3, the floating frame 3 and the lifting frame 1 slide up and down together, a clamping hook frame 4 and a gas spring 5 are arranged on the floating frame 3, the clamping hook frame 4 and the floating frame 3 slide horizontally together, and the gas spring 5 connects the floating frame 3 and the clamping hook frame 4;

[0037] A chain 6 is connected between the lifting frame 1 and the clamping hook frame 4, and a fixed pulley 7 is provided on the floating frame 3. The chain 6 passes around the fixed pulley 7 to support the fixed pulley 7;

[0038] In the present application, the cargo vehicle includes a cargo cage vehicle and a non-powered flatbed material vehicle; when in use, the clamping hook frame 4 is located below the cargo vehicle, and the lifting frame 1 will gradually rise, which is divided into three stages:

[0039] In the first stage of the lifting frame 1 rising, since the thrust of the gas spring 5 is slightly greater than the sum of the gravity of the floating frame 3, the clamping hook frame 4 and the gas spring 5, and the pulling force of the chain 6 is almost equal to the sum of the gravity of the floating frame 3, the clamping hook frame 4 and the gas spring 5, the gas spring 5 can keep the clamping hook frame 4 from retracting. Therefore, as the lifting frame 1 rises, the chain 6 can pull the floating frame 3 and the clamping hook frame 4 to rise together;

[0040] When the clamping hook frame 4 touches the cargo vehicle, the lifting frame 1 rises to the second stage. At this time, the cargo vehicle presses on the clamping hook frame 4, and the pulling force of the chain 6 will increase the gravity of part of the cargo vehicle, exceeding the sum of the gravity of the floating frame 3, the clamping hook frame 4 and the gas spring 5, and also exceeding the thrust of the gas spring 5. Therefore, the floating frame 3 will stop rising, while the lifting frame 1 can continue to rise, allowing the chain 6 to pull the clamping hook frame 4 to move, compressing the gas spring 5, so that the clamping hook frame 4 retracts, and the cargo vehicle is clamped between the floating frame 3 and the clamping hook frame 4;

[0041] Afterwards, when the clamping hook frame 4 completely presses the cargo vehicle, the lifting frame 1 reaches the third stage of ascent. At this time, the gas spring 5 cannot be further retracted, and the lifting frame 1 continues to rise. The chain 6 can drive the floating frame 3, the clamping hook frame 4 and the cargo vehicle to rise together, so that part of the casters of the cargo vehicle can be lifted, and then the cargo vehicle can be towed or pushed;

[0042] Based on the lifting automatic clamping and traction attachment, the cargo cage truck or the non-powered flatbed material truck can be clamped while lifting the cargo cage truck or the non-powered flatbed material truck, so that the cargo cage truck and the non-powered flatbed material truck can move more smoothly.

[0043] In this embodiment, the driving module 2 is generally an electric hydraulic system cylinder, and may also be driven by an electric screw, or a manual pump hydraulic cylinder.

[0044] In this embodiment, the floating frame 3 includes two main boards 31 arranged at intervals in the horizontal direction, a reinforcing plate 32 connecting the two main boards 31, the reinforcing plate 32 is located between the two main boards 31, and supports the main boards 31. A first sleeve 33 is fixed between the lower ends of the two main boards 31;

[0045] The hook holder 4 includes a second sleeve 41, which is inserted into the first sleeve 33. The end of the second sleeve 41 away from the first sleeve 33 is provided with a hook portion 42; therefore, the second sleeve 41 can slide in the first sleeve 33, thereby allowing the hook portion 42 to move;

[0046] The gas spring 5 is inserted into the first sleeve 33 and the second sleeve 41. One end of the gas spring 5 is connected to the first sleeve 33, and the other end of the gas spring 5 is connected to the second sleeve 41. In the idle state, the gas spring 5 will open the second sleeve 41 to keep the second sleeve 41 extended.

[0047] Specifically, the hooking parts 42 are two and symmetrically arranged on both sides of the second sleeve 41 along its sliding direction, so that when the cargo vehicle is pressed, the pressing can be more firm;

[0048] In addition, a hook pad 34 is provided at one end of the first sleeve 33 close to the hook portion 42. The hook pad 34 is flush with the top of the first sleeve 33 and is located between the two hook portions 42. Therefore, the hook pad 34 will be above the second sleeve 41. When the floating frame 3 and the clamping hook frame 4 rise together, the hook pad 34 will first touch the crossbeam of the cargo vehicle. When the clamping hook frame 4 moves, the hook portion 42 can hook the crossbeam of the cargo vehicle and push the cargo vehicle to move on the hook pad 34. The hook portion 42 will not interfere with the hook pad 34 when moving until the crossbeam of the cargo vehicle is pressed against the main board 31.

[0049] Preferably, a frame baffle 35 is provided at one end of the main board 31 close to the hook portion 42. The frame baffle 35 is located above the first sleeve 33 and opposite to the hook portion 42. The frame baffle 35 can be set larger to increase the contact area with the cargo vehicle. The hook portion 42 and the frame baffle 35 can cooperate to firmly clamp the cargo vehicle.

[0050] In this embodiment, there are two chains 6 and they are symmetrically arranged along the sliding direction of the second sleeve 41 ; the fixed pulley 7 is arranged on the side of the main board 31 away from the other main board 31 , and the fixed pulley 7 corresponds to the chain 6 one by one.

[0051] In this embodiment, a first guide rail 11 corresponding to the main board 31 is fixed on the lifting frame 1, and a first guide wheel 36 is provided on the main board 31. The first guide wheel 36 cooperates with the first guide rail 11 to allow the main board 31 to slide up and down, allowing the floating frame 3 to slide.

[0052] In this embodiment, the tops of the two first guide rails 11 are connected to a limiting plate 12, and the main board 31 is located below the limiting plate 12. The limiting plate 12 connects the two first guide rails 11 to improve the strength of the first guide rails 11 and, at the same time, limits the position of the main board 31 to prevent the first guide wheel 36 from detaching from the first guide rail 11.

[0053] Example 2

[0054] Reference Figures 4 to 8 As shown, a tractor comprises a vehicle body 8, on which is provided the lifting automatic clamping traction attachment as described in Example 1, a driving module 2 is arranged on the vehicle body 8, and a lifting frame 1 is slidably matched with the vehicle body 8 up and down;

[0055] The vehicle body 8 includes a chassis 81, on which two legs 82 are arranged at intervals, a walking wheel 83 is provided at one end of the legs 82 away from the chassis 81, a driving wheel 84 is provided at the bottom of the chassis 81, and a power unit for supplying energy to the driving module 2 and the driving wheel 84 respectively is provided in the chassis 81;

[0056] The lifting frame 1 is arranged on one side of the chassis 81 close to the support leg 82. The chassis 81 is provided with a second guide rail 811, and the lifting frame 1 is provided with a second guide wheel 13. The second guide wheel 13 cooperates with the second guide rail 811 to allow the lifting frame 1 to slide up and down; one end of the driving module 2 is connected to the chassis 81, and the other end of the driving module 2 is connected to the lifting frame 1. The driving module 2 is used to drive the lifting frame 1 to move up and down; the floating frame 3 and the clamping hook frame 4 are both located between the two support legs 82. When not in use, the clamping hook frame 4 can be hidden in the gap between the two support legs 82, and the support legs 82 can be inserted under the cargo vehicle. The hooking portion 42 will not interfere with the cargo vehicle, and then the lifting frame 1 can be started to rise.

[0057] It should be noted that general cargo cage trucks and non-powered flatbed material trucks will have four universal wheels at the bottom, and they can only be towed after two universal wheels are lifted using automatic clamping attachments.

[0058] In this embodiment, two universal wheels 85 can be further provided at one end of the chassis 81 away from the legs 82 to further assist the movement of the chassis 81 and improve the stability of the tractor during movement; the universal wheels 85 have a spring shock-absorbing function to allow the tractor to remain stable when traveling on uneven ground.

[0059] The driving wheel 84 is generally an electric driving wheel. An operating handle 86 is also provided on the chassis 81, and the driving wheel 84 can be rotated to adjust the direction.

[0060] In this embodiment, the driving module 2 is generally an electric hydraulic system cylinder. The power unit includes a battery and a hydraulic oil station. The battery can supply energy to the driving wheel 84 so that the driving wheel 84 can drive the vehicle body 8 to move, and the hydraulic oil station mainly supplies fluid to the cylinder to ensure that the cylinder has sufficient thrust.

[0061] In this embodiment, a guard arm 87 is detachably mounted on the chassis 81, and an elastic belt 88 is provided on the guard arm 87, and a hook 89 is connected to the elastic belt 88. When the cargo cage truck is too high, the hook 89 can be hung on the cargo cage truck, and the elastic force of the elastic belt 88 can be used to pull the cargo cage truck to prevent the cargo cage truck from tipping over; the guard arm 87 can be removed when towing a cargo cage truck with a low height, towing a non-powered flatbed material truck, or when not in use.

[0062] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A lifting automatic clamping and traction attachment, comprising a lifting frame and a driving module for driving the lifting frame to move up and down, characterized in that: It also includes a floating frame, the floating frame and the lifting frame slide together up and down, the floating frame is provided with a clamping hook frame and a gas spring, the clamping hook frame and the floating frame slide together horizontally, and the gas spring connects the floating frame and the clamping hook frame; A chain is connected between the lifting frame and the clamping hook frame, a fixed pulley is arranged on the floating frame, and the chain passes around the fixed pulley to support the fixed pulley.

2. The lifting automatic clamping and traction attachment according to claim 1 is characterized in that: The floating frame comprises two main boards arranged at intervals in the horizontal direction, and a reinforcing plate connecting the two main boards, and a first sleeve is fixed between the lower ends of the two main boards; The clamping hook frame comprises a second sleeve, the second sleeve is inserted into the first sleeve, and an end of the second sleeve away from the first sleeve is provided with a hooking portion; The gas spring is inserted into the first sleeve and the second sleeve.

3. The lifting automatic clamping and traction attachment according to claim 2 is characterized in that: The number of the hooking parts is two and they are symmetrically arranged on both sides of the second sleeve along its sliding direction.

4. The lifting automatic clamping and traction attachment according to claim 3 is characterized in that: A hook pad is provided at one end of the first sleeve close to the hooking portion. The hook pad is flush with the top of the first sleeve and is located between the two hooking portions.

5. The lifting automatic clamping and traction attachment according to claim 2 is characterized in that: A frame baffle is provided at one end of the main board close to the hook portion, and the frame baffle is located above the first sleeve and opposite to the hook portion.

6. The lifting automatic clamping and traction attachment according to claim 2, characterized in that: There are two chains which are symmetrically arranged along the sliding direction of the second sleeve; and the fixed pulley is arranged on a side of the main board away from the other main board.

7. The lifting automatic clamping and traction attachment according to claim 2 is characterized in that: The lifting frame is fixed with a first guide rail corresponding to the main board one by one, the main board is provided with a first guide wheel, and the first guide wheel cooperates with the first guide rail.

8. The lifting automatic clamping and traction attachment according to claim 7, characterized in that: The tops of the two first guide rails are connected with a limiting plate, and the main board is located below the limiting plate.

9. A tractor, comprising a vehicle body, the vehicle body comprising a chassis, two legs arranged at intervals on the chassis, a running wheel being arranged at one end of the legs away from the chassis, a driving wheel being arranged at the bottom of the chassis, a power unit being arranged in the chassis for supplying energy to a driving module and the driving wheel respectively, characterized in that ； The vehicle body is provided with a lifting automatic clamping and traction attachment as described in any one of claims 1-8, the lifting frame is arranged on a side of the chassis close to the support legs, the lifting frame and the chassis slide up and down, the driving module is arranged on the chassis, and the floating frame and the clamping hook frame are both located between the two support legs.

10. The tractor according to claim 9, characterized in that: The chassis is detachably provided with a guard arm, the guard arm is provided with an elastic band, and the elastic band is connected with a hook.

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