Push-and-pull pallet fork comprising buffer device

Abstract

The push-pull pallet fork comprises an upper fork assembly, a middle fork assembly and a lower fork assembly, the upper fork assembly, the middle fork assembly and the lower fork assembly are sequentially and coaxially connected, the upper fork assembly and the middle fork assembly are driven by the lower fork assembly to move in the axis direction, and the upper fork assembly pushes and pulls a pull-type tray; the middle fork assembly is in transmission connection with the lower fork assembly through a rack, and the upper fork assembly is in transmission connection with the middle fork assembly through a chain. A buffering device is installed on the lower fork assembly, and when the chain is broken, the middle fork assembly makes contact with the buffering device and decelerates under the action of the buffering device. The push-and-pull pallet fork comprising the buffer device transports goods in a push-and-pull mode, does not bear load and is not prone to being damaged due to long-term load bearing. According to the push-and-pull pallet fork comprising the buffer device, the buffer device is arranged, so that the fork body is prevented from being disengaged due to chain breakage, and the loss during failure is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field related to logistics and warehousing, and more precisely to a push-pull fork including a buffer device. Background Art

[0002] Telescopic forks are widely used in the field of logistics and warehousing, and their loading performance and operational stability are of vital importance. Telescopic forks are usually used in conjunction with pallets or boxes, which hold goods. Existing telescopic forks extend from the bottom of the pallet or box and lift the goods to transport them. When there are a lot of goods or the weight of the goods is heavy, the overall weight of the pallet or box is large, and the telescopic fork has a large load and is easily damaged. In order to prevent the telescopic fork from being damaged under heavy loads, a common method is to increase the self-strength and connection strength of the telescopic fork. However, this method will increase the weight of the telescopic fork and require a more powerful drive mechanism, which increases energy consumption and manufacturing costs.

[0003] In summary, there is a need in the art to improve the existing telescopic forks so as to achieve the transportation of heavy goods with a relatively small dead weight. Utility Model Content

[0004] In view of this, the purpose of the present invention is to provide a push-pull fork and a push-pull hook-pull pallet including a buffer device, which does not bear weight itself and is provided with a buffer device for greater push-pull forces, so as to realize the transportation of heavy goods with a smaller dead weight.

[0005] In order to achieve the above-mentioned purpose, the utility model provides a push-pull fork including a buffer device, including an upper fork assembly, a middle fork assembly and a lower fork assembly that are coaxially connected in sequence, the upper fork assembly and the middle fork assembly are driven by the lower fork assembly to move along the axial direction, and the upper fork assembly pushes and pulls a hook-pull pallet; the middle fork assembly is transmission connected to the lower fork assembly through a rack, and the upper fork assembly is transmission connected to the middle fork assembly through a chain; a buffer device is installed on the lower fork assembly, and when the chain breaks, the middle fork assembly contacts the buffer device and slows down under the action of the buffer device.

[0006] Preferably, the lower fork assembly includes a lower fork, a plurality of mutually meshing lower fork gears, a chain tensioner and a motor. The lower fork gears, the chain tensioner and the motor are all mounted on the lower fork, and the motor is transmission-connected to the lower fork gears.

[0007] Preferably, the middle fork assembly includes a middle fork, a rack, a fork limit block, a chain sheave, a buffer block and a chain, the rack is connected to the middle fork, and the rack is engaged with several of the lower fork gears; the fork limit block is arranged at the end of the middle fork; the chain sheave is rotatably installed on the side of the middle fork, the buffer block is fixedly installed on the side of the middle fork, and the buffer block is arranged horizontally corresponding to the buffer device; the chain is wound around the chain sheave and the chain tensioner, and the chain is transmission-connected to the upper fork assembly.

[0008] Preferably, the upper fork assembly includes an upper fork, a guide wheel assembly, a guide block, a chain fixing block, and an upper fork limit block. The guide wheel assembly, the guide block, the chain fixing block, and the upper fork limit block are all installed on the side of the upper fork, the chain is connected to the chain fixing block, and the upper fork limit block is located on the side of the upper fork head end.

[0009] Preferably, the buffer device includes a fixed block, a guide stud, a spring and a buffer block, the fixed block is installed on the side of the lower fork, the guide stud is slidably connected to the fixed block, and the guide stud is coaxial with the lower fork, the spring is sleeved on the guide stud, one end of the spring abuts against the fixed block, and the other end is fixedly connected to the buffer block, and the buffer block is fixedly connected to one end of the guide stud; the buffer stopper and the buffer block are aligned in the horizontal direction.

[0010] Preferably, a calibration scale device is installed on the lower fork assembly, and the calibration scale device includes a positioning bracket connected to the lower fork, the positioning bracket has a positioning scale, a pin is installed on the side of the positioning bracket, the side of the upper fork has a reserved hole, and the side of the upper fork also has a scale.

[0011] Preferably, the end of the pin has a spherical handle.

[0012] Compared with the prior art, the advantages of a push-pull fork including a buffer device disclosed by the utility model are: the push-pull fork including the buffer device adopts a push-pull method to transport goods, does not bear weight itself, and is not easily damaged by long-term load-bearing; the push-pull fork including the buffer device prevents the fork body from being disengaged due to chain breakage by setting a buffer device, thereby reducing losses during failure; the push-pull fork including the buffer device is provided with a calibration scale device, which can adjust the upper fork assembly to the center after maintenance, is convenient and quick to operate, and helps to improve maintenance efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0014] like Figure 1 Shown is a schematic structural diagram of a push-pull fork including a buffer device according to the present invention.

[0015] like Figure 2 Shown is a front view of a push-pull fork including a buffer device according to the present invention.

[0016] like Figure 3 Shown is a front cross-sectional view of a push-pull fork including a buffer device according to the present invention.

[0017] like Figure 4 Shown Figure 3 Enlarged schematic diagram of the middle part of the structure.

[0018] like Figure 5 Shown is a top view of a push-pull fork including a buffer device according to the present invention. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0020] like Figure 1 As shown, the present application discloses a push-pull fork including a buffer device, which includes an upper fork assembly 10, a middle fork assembly 20, and a lower fork assembly 30 that are coaxially connected in sequence. The upper fork assembly 10 and the middle fork assembly 20 are driven by the lower fork assembly 30 to move along the axial direction, and the upper fork assembly 10 pushes and pulls the hook-pull pallet. The middle fork assembly 20 is transmission-connected to the lower fork assembly 30 via a rack, and the upper fork assembly 10 is transmission-connected to the middle fork assembly 20 via a chain. A buffer device 40 is installed on the lower fork assembly 10. When the chain breaks, the middle fork assembly 20 contacts the buffer device 40 and slows down under the action of the buffer device. The push-pull fork including the buffer device uses a push-pull method to transport goods, does not bear weight itself, and is not easily damaged by long-term load-bearing. By providing the buffer device 40, it is possible to prevent the fork body from being disengaged due to a broken chain, reducing losses during a failure.

[0021] See also Figures 2 to 5The lower fork assembly 30 includes a lower fork 30, several lower fork gears 31 meshing with each other, a chain tensioner 33 and a motor 34. The lower fork gear 31, the chain tensioner 33 and the motor 34 are all installed on the lower fork 30. The motor 34 is connected to the lower fork gear 31 through transmission. The motor 34 drives the middle fork assembly 20 to extend or retract through the lower fork gear 31.

[0022] The middle fork assembly 20 includes a middle fork 21, a rack 22, a fork limit block 23, a chain sheave 24, a buffer block 25 and a chain 26. The rack 22 is connected to the middle fork 21, and the rack 22 is engaged with a plurality of lower fork gears 31; the fork limit block 23 is arranged at the end of the middle fork 21 to prevent the upper fork assembly 10 from excessive contraction; the chain sheave 24 is rotatably mounted on the side of the middle fork 21, and the buffer block 25 is fixedly mounted on the side of the middle fork 21, and the buffer block 25 is horizontally corresponding to the buffer device 40; the chain 26 is wound around the chain sheave 24 and the chain tensioner 33, and the chain 26 is transmission-connected to the upper fork assembly 21.

[0023] The upper fork assembly 10 includes an upper fork 11, a guide wheel assembly 12, a guide block 13, a chain fixing block 14, and an upper fork limit stop 15. The guide wheel assembly 12, guide block 13, chain fixing block 14, and upper fork limit stop 15 are all mounted on the side of the upper fork 11. The chain 26 is connected to the chain fixing block 14. The upper fork limit stop 15 is located on the side of the head end of the upper fork 11 to prevent excessive contraction of the upper fork 11. The side of the middle fork 21 has a guide rail, and the guide wheel assembly 12 and guide block 13 are disposed within the guide rail to guide the movement of the upper fork 11.

[0024] The buffer device 40 includes a fixed block 41, a guide stud 42, a spring 43, and a buffer block 44. The fixed block 41 is mounted on the side of the lower fork 31. The guide stud 42 is slidably connected to the fixed block 41 and is coaxial with the lower fork 31. The spring 43 is sleeved on the guide stud 42. One end of the spring 43 abuts the fixed block 41, and the other end is fixedly connected to the buffer block 44. The buffer block 44 is fixedly connected to one end of the guide stud 42. The buffer block 25 and the buffer block 44 are arranged in a horizontal alignment. When the chain 26 is subjected to excessive force and breaks, the buffer block 25 pushes the buffer block 44 to move, compressing the spring 43, thereby slowing down the middle fork 21. The upper fork 11 continues to move until it is limited at the end of the middle fork 21.

[0025] The lower fork assembly 30 is also equipped with a calibration scale device 50. The calibration scale device 50 includes a positioning bracket 51 connected to the lower fork 31, a positioning scale 52 on the positioning bracket 51, a pin 53 mounted on the side of the positioning bracket 51, and a reserved hole on the side of the upper fork 11. The side of the upper fork 11 also has a scale 16. When the chain 26 breaks, the motor 35 is started to retract the middle fork 20 to its original position. The upper fork assembly 10 is then manually retracted. To center the upper fork 11, the pin 53 is manually pushed into the reserved hole. The scale 16 and the positioning scale 52 are then compared to determine the middle position, ensuring that the upper fork 11 is centered. The end of the pin 52 preferably has a spherical handle 54 for easy operation.

[0026] The above description of the disclosed embodiments will enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A push-pull fork including a buffer device, characterized in that: It includes an upper fork assembly, a middle fork assembly and a lower fork assembly which are coaxially connected in sequence. The upper fork assembly and the middle fork assembly are driven by the lower fork assembly to move along the axial direction, and the upper fork assembly pushes and pulls the hook-pull pallet; the middle fork assembly is transmission-connected to the lower fork assembly through a rack, and the upper fork assembly is transmission-connected to the middle fork assembly through a chain; a buffer device is installed on the lower fork assembly, and when the chain breaks, the middle fork assembly contacts the buffer device and decelerates under the action of the buffer device.

2. The push-pull fork including a buffer device according to claim 1, characterized in that: The lower fork assembly includes a lower fork, a plurality of lower fork gears meshing with each other, a chain tensioner and a motor. The lower fork gears, the chain tensioner and the motor are all mounted on the lower fork, and the motor is in transmission connection with the lower fork gears.

3. The push-pull fork including a buffer device according to claim 2, characterized in that: The middle fork assembly includes a middle fork, a rack, a fork limit block, a chain sheave, a buffer block and a chain, the rack is connected to the middle fork, and the rack is engaged with several of the lower fork gears; the fork limit block is arranged at the end of the middle fork; the chain sheave is rotatably installed on the side of the middle fork, the buffer block is fixedly installed on the side of the middle fork, and the buffer block is arranged horizontally corresponding to the buffer device; the chain is wound around the chain sheave and the chain tensioner, and the chain is transmission-connected to the upper fork assembly.

4. The push-pull fork including a buffer device according to claim 3, characterized in that: The upper fork assembly includes an upper fork, a guide wheel assembly, a guide block, a chain fixing block, and an upper fork limit block. The guide wheel assembly, the guide block, the chain fixing block, and the upper fork limit block are all installed on the side of the upper fork, the chain is connected to the chain fixing block, and the upper fork limit block is located on the side of the upper fork head end.

5. The push-pull fork including a buffer device according to claim 3, characterized in that: The buffer device includes a fixed block, a guide stud, a spring and a buffer block. The fixed block is installed on the side of the lower fork. The guide stud is slidably connected to the fixed block, and the guide stud is coaxial with the lower fork. The spring is sleeved on the guide stud. One end of the spring abuts against the fixed block, and the other end is fixedly connected to the buffer block. The buffer block is fixedly connected to one end of the guide stud; the buffer stopper and the buffer block are aligned in the horizontal direction.

6. The push-pull fork including a buffer device according to claim 4, characterized in that: A calibration scale device is installed on the lower fork assembly, and the calibration scale device includes a positioning bracket connected to the lower fork, the positioning bracket is provided with a positioning scale, a pin is installed on the side of the positioning bracket, the side of the upper fork has a reserved hole, and the side of the upper fork also has a scale.

7. The push-pull fork including a buffer device according to claim 6, characterized in that: The end of the pin shaft is provided with a spherical grip.

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