Wheel lifting mechanism applied to forklift

Abstract

A wheel lifting mechanism (10), comprising a driving mechanism (11), a sliding block (12), a crank (13), a connecting rod (14), a rolling wheel group (15) and a fork (16). The wheel lifting mechanism (10) can provide for a common forklift a function of lifting bogie wheels of the forklift. After the bogie wheels are lifted, the height of a fork arm can be kept unchanged. When the bogie wheels are in a lifted state, the fork arm can enter and exit a four-way entry pallet without being in contact with the pallet, so as to nondestructively fork and transfer the four-way entry pallet.

Description

A lifting wheel mechanism applied to a forklift TECHNICAL FIELD

[0001] The present application relates to the field of lifting wheel mechanisms, in particular to a lifting wheel mechanism applied to a forklift. BACKGROUND

[0002] The pallet truck is a kind of forklift, namely a logistics handling equipment for carrying goods. In use, the forks carried by the pallet truck are inserted into the pallet holes, the hydraulic system is driven by manpower to realize the lifting and lowering of the pallet goods, and the handling operation is completed by manpower. It is the most convenient, effective and common loading and unloading and handling tool in pallet transportation tools.

[0003] At present, there are few pallet trucks on the market that are specially used for carrying square pallets. The common methods for carrying square pallets are as follows: 1. ordinary forklift; 2. wide-leg forklift or counterweight forklift.

[0004] However, using an ordinary forklift to directly push a square pallet will cause the carrying wheels to roll over the square pallet when the fork arm enters the square pallet, which will damage the square pallet. Using a wide-leg forklift or a counterweight forklift is costly, and the vehicle body is usually large in size, which has poor adaptability to small sites and narrow lanes. Content of the utility model

[0005] In order to make up for the above shortcomings, the present application provides a lifting wheel mechanism structure applied to a forklift, aiming to improve the problems mentioned in the above background art.

[0006] The present application provides a lifting wheel mechanism applied to a forklift, which comprises a driving mechanism, a sliding block, a crank, a connecting rod, a pulley block and a fork. The driving mechanism is fixedly connected to the sliding block and can push the sliding block to move. The crank is fixedly connected to the fork and in contact with the sliding block. The pulley block is fixedly connected to the fork. One end of the connecting rod is connected to the crank, and the other end is connected to the pulley block.

[0007] Further, the driving mechanism pushes the sliding block to move, the crank rotates accordingly, thereby pulling the rod and driving the pulley block to rotate.

[0008] Further, the fork is provided with a hole corresponding to the position of the pulley block, which facilitates the lifting of the pulley block.

[0009] Optionally, the crank comprises a crank fixed hole, a crank connecting rod fixed hole and a roller. The crank fixed hole is rotatably connected to the fork, and the crank connecting rod fixed hole is connected to the connecting rod. The roller is in contact with the sliding block, facilitating the rotation of the crank.

[0010] Optionally, the pulley block comprises a fixed seat, a fixed seat, a rotating block, a pulley; the fixed seat is fixedly connected to the fork, the rotating block is rotatably connected to the fixed seat through the fixed shaft, one end of the rotating block is connected to the connecting rod, and the other end is connected to the pulley; under the driving of the connecting rod, the rotating block rotates around the fixed shaft, driving the pulley to rotate.

[0011] Further, the fixed seat is provided with a rotating block connecting hole and an inclined surface; the rotating block is provided with a pulley block connecting rod fixing hole, a rotating block fixing hole and a pulley connecting hole; the fixed shaft is rotatably connected to the fixed seat through the rotating block connecting hole and the rotating block fixing hole, and the inclined surface facilitates the installation and connection of the rotating block; the pulley block connecting rod fixing hole is located at one end of the rotating block, and the pulley connecting hole is located at the other end of the rotating block, the pulley block connecting rod fixing hole is used to connect the connecting rod, and the pulley connecting hole is used to connect the pulley.

[0012] Further, the pulley comprises a wheel, a wheel cover, a pulley connecting shaft and a wheel fixing shaft; the pulley connecting shaft is located on the wheel cover and connected to the pulley connecting hole, so that the pulley is connected to the rotating block; the wheel cover is located on both sides of the wheel, and the wheel fixing shaft fixes the wheel through the wheel cover.

[0013] Optionally, the driving mechanism comprises a telescopic oil cylinder, a sliding rail, a moving block and a driving fixed seat; the sliding block comprises a sliding groove; the telescopic oil cylinder and the sliding rail are fixed on the fixed seat, the telescopic oil cylinder is fixedly connected to the moving block and drives the moving block to move on the sliding rail; the moving block is connected to the sliding block, and the movement of the moving block drives the movement of the sliding block, and under the action of the sliding groove, the crank rotates accordingly.

[0014] Compared with the prior art, the beneficial effects of the present application are: different from the prior art, the present application provides a lifting wheel mechanism comprising a driving mechanism, a sliding block, a crank, a connecting rod, a pulley block and a fork; the lifting wheel mechanism provided by the present application can increase the lifting function of the carrying wheels of the ordinary fork truck, and the height of the fork arm can remain unchanged after the carrying wheels are lifted. When the carrying wheels are in the lifted state, the fork arm can enter and exit the field-shaped pallet without contacting the pallet, thereby realizing the non-damage forking and transporting of the field pallet. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0016] Fig. 1 is a structural schematic diagram of a wheel lifting mechanism according to an embodiment of the present application;

[0017] Fig. 2 is an exploded schematic diagram of the wheel lifting mechanism according to an embodiment of the present application;

[0018] Fig. 3 is a structural schematic diagram of a crank according to an embodiment of the present application;

[0019] Fig. 4 is a structural schematic diagram of a pulley block according to an embodiment of the present application;

[0020] Fig. 5 is an exploded structural schematic diagram of the pulley block according to an embodiment of the present application;

[0021] Fig. 6 is a schematic diagram of the internal structure of the wheel lifting mechanism according to an embodiment of the present application;

[0022] Fig. 7 is an enlarged view of A in Fig. 6;

[0023] Fig. 8 is a schematic diagram of the working process of the wheel lifting mechanism according to an embodiment of the present application;

[0024] Fig. 9 is a schematic diagram of the wheel lifting mechanism according to an embodiment of the present application;

[0025] Fig. 10 is a schematic diagram of the wheel lifting mechanism according to an embodiment of the present application when applied to a pallet truck. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings.

[0027] Please refer to Figs. 1-2, the wheel lifting mechanism 10 comprises a driving mechanism 11, a sliding block 12, a crank 13, a connecting rod 14, a pulley block 15, and a fork 16. The driving mechanism 11 is fixedly connected to the sliding block 12 and can push the sliding block 12 to move. The crank 13 is fixedly connected to the fork 16 and is in contact with the sliding block 12. The pulley block 15 is fixedly connected to the fork 16. The connecting rod 14 is connected to the crank 13 at one end and to the pulley block 15 at the other end. The driving mechanism 11 pushes the sliding block 12 to move, and the crank 13 rotates accordingly, thereby pulling the connecting rod 14 and driving the pulley block 15 to rotate. The fork 16 is provided with a hole 161 corresponding to the pulley block 15, which facilitates the lifting of the pulley block 15.

[0028] Please refer to Fig. 3, the crank 13 comprises a crank fixing hole 131, a crank connecting rod fixing hole 132, and a roller 133. A pin shaft passes through the fork 16 and the crank fixing hole 131, thereby connecting the crank 13 to the fork 16 in rotation. A pin shaft passes through the crank connecting rod fixing hole 132 and the connecting rod 14, thereby connecting the connecting rod 14 to the crank 13 at one end. The roller 133 is in contact with the sliding block 12, facilitating the rotation of the crank 13.

[0029] Please refer to Fig.4-Fig.5, the pulley block 15 includes a fixed seat 151, a fixed shaft 152, a rotating block 153, a pulley 154. The fixed seat 151 is fixedly connected on the fork 16, the rotating block 153 is rotatably connected on the fixed seat 151 through the fixed shaft 152, one end of the rotating block 153 is connected with the connecting rod 14, and the other end is connected with the pulley 154. Thus, under the driving of the connecting rod 14, the rotating block 153 rotates with the fixed shaft 152 as the center, and drives the pulley 154 to rotate.

[0030] The fixed seat 151 has a rotating block connecting hole 1511 and a slope 1512. The rotating block 153 has a pulley block connecting rod fixing hole 1531, a rotating block fixing hole 1532 and a pulley connecting hole 1533. The pulley 154 includes a wheel 1541, a wheel cover 1542, a pulley connecting shaft 1543 and a wheel fixing shaft 1544. The fixed shaft 152 is rotatably connected with the rotating block 153 on the fixed seat 151 through the rotating block connecting hole 1511 and the rotating block fixing hole 1532, and the slope 1512 facilitates the connection of the rotating block 153. The pulley block connecting rod fixing hole 1531 is located at one end of the rotating block 153, and the pulley connecting hole 1533 is located at the other end of the rotating block 153. The pulley block connecting rod fixing hole 1531 is used for connecting the connecting rod 14, and the pulley connecting hole 1533 is used for connecting the pulley 154. The pulley connecting shaft 1543 is located on the wheel cover 1542 and connects the pulley connecting hole 1533 to connect the pulley 154 to the rotating block 153. The wheel cover 1542 is located on both sides of the wheel 1541, and the wheel fixing shaft 1544 fixes the wheel 1541 through the wheel cover 1542.

[0031] Please refer to Fig.6-Fig.7, the driving mechanism 11 includes: a telescopic oil cylinder 111, a sliding rail 112, a moving block 113, a driving fixed seat 114. The sliding block 12 includes a sliding groove 121. The telescopic oil cylinder 111 and the sliding rail 112 are fixed on the fixed seat 114, the telescopic oil cylinder 111 is fixedly connected with the moving block 113, and the moving block 113 is pushed to move on the sliding rail 112. The moving block 113 is connected with the sliding block 12, and the movement of the moving block 113 drives the movement of the sliding block 12, so that the crank 13 moves on the sliding groove 121, and then drives the movement of the connecting rod 14.

[0032] Please refer to Fig.8-Fig.10, when the forklift 20 needs to enter the pallet, the pulley needs to be lifted, the telescopic oil cylinder 111 pushes the sliding block 12 away from itself, under the action of the sliding groove 121, the crank 13 rotates with the crank fixing hole 131 as the center, thereby pulling the connecting rod 14 to move away from the pulley block 15, and then driving the rotating block 153 to rotate with the fixed shaft 152 as the center, driving the pulley 154 to rotate, and lifting the pulley 154. If it is needed to lower the pulley, the reverse steps can be performed, which will not be described herein.

[0033] The lifting mechanism provided by the patent can increase the lifting function of the carrying wheels of the ordinary forklift, and the height of the fork arm can remain unchanged after the carrying wheels are lifted. When the carrying wheels are in the lifted state, the fork arm can enter and exit the field-shaped pallet without contacting the pallet, thereby realizing the non-damage forking and transporting of the field-shaped pallet.

[0034] The above is only an embodiment of the present application and is not used to limit the protection scope of the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, improvement or equivalent replacement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

Claims

1. A wheel lifting mechanism, which is used in a forklift, and is characterized by: The wheel-lifting mechanism includes a drive mechanism, a slider, a crank, a connecting rod, a pulley assembly, and a fork. The drive mechanism is fixedly connected to the slider and can push the slider to move. The crank is fixedly connected to the fork and contacts the slider. The pulley assembly is fixedly connected to the fork. One end of the connecting rod is connected to the crank, and the other end is connected to the pulley assembly.

2. The wheel lifting mechanism according to claim 1, characterized in that: The driving mechanism pushes the slider to move, and the crank rotates accordingly, thereby pulling the rod, and further driving the pulley assembly to rotate.

3. The wheel lifting mechanism according to claim 1, characterized in that: The fork is provided with a hole, the position of the hole corresponds to the pulley block, and the pulley block is convenient for lifting.

4. The wheel lifting mechanism according to claim 2, characterized in that: The crank includes a crank fixing hole, a crank connecting rod fixing hole, and a roller; the crank fixing hole is rotatably connected to the fork, and the crank connecting rod fixing hole is connected to the connecting rod; the roller contacts the slider to facilitate the rotation of the crank.

5. The wheel lifting mechanism according to claim 2, characterized in that: The pulley assembly includes a fixed seat, a fixed seat, a rotating block, and a pulley; the fixed seat is fixedly connected to the fork, the rotating block is rotatably connected to the fixed seat through the fixed shaft, one end of the rotating block is connected to the connecting rod, and the other end is connected to the pulley; driven by the connecting rod, the rotating block rotates with the fixed shaft as the center, driving the pulley to rotate.

6. The wheel lifting mechanism according to claim 5, characterized in that: The fixing seat is provided with a rotating block connecting hole and an inclined surface; the rotating block is provided with a pulley group connecting rod fixing hole, a rotating block fixing hole and a pulley connecting hole; the fixed shaft passes through the rotating block connecting hole and the rotating block fixing hole to rotatably connect the rotating block to the fixing seat, and the inclined surface facilitates the installation and connection of the rotating block; the pulley group connecting rod fixing hole is located at one end of the rotating block, and the pulley connecting hole is located at the other end of the rotating block, the pulley group connecting rod fixing hole is used to connect the connecting rod, and the pulley connecting hole is used to connect the pulley.

7. The wheel lifting mechanism according to claim 6, characterized in that: The pulley includes a wheel, a wheel cover, a pulley connecting shaft, and a wheel fixing shaft; the pulley connecting shaft is located on the wheel cover and connected to the pulley connecting hole, so that the pulley is connected to the rotating block; the wheel cover is located on both sides of the wheel, and the wheel fixing shaft fixes the wheel through the wheel cover.

8. The wheel lifting mechanism according to claim 2, characterized in that: The driving mechanism includes: a telescopic cylinder, a slide rail, a moving block, and a driving fixed seat; the slider includes a slide groove; the telescopic cylinder and the slide rail are fixed to the fixed seat, and the telescopic cylinder is fixedly connected to the moving block to push the moving block to move on the slide rail; the moving block is connected to the slider, and the movement of the moving block drives the movement of the slider, and under the action of the slide groove, the crank rotates accordingly.

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