Forklift

Abstract

The forklift comprises a forklift body frame, a forklift bottom frame connected to the forklift body frame and a pallet fork vertically sliding on the forklift body frame, and further comprises a limiting mechanism used for limiting the lifting height of the pallet fork, and the limiting mechanism comprises a fixing pin horizontally arranged on the side wall of the forklift body frame in a sliding mode and a limiting block arranged on the side wall of the pallet fork; the pallet fork has a releasing state and a lifting state, and the fixing pin has a limiting state and a retracting state; when the pallet fork is in a lifting state, the pallet fork slides to the top of the vehicle body frame; when the pallet fork is in the release state and the fixing pin is in the limiting state, the limiting block abuts against the fixing pin, and a receding gap is formed between the pallet fork and the vehicle underframe. When the pallet fork is in the release state and the fixing pin is in the retraction state, the limiting block does not abut against the fixing pin, and the pallet fork abuts against the vehicle underframe. By the adoption of the structure, when a forklift is used for transporting magnetic materials into a sintering furnace, the carbon felt is not prone to being damaged by a pallet fork.

Description

Technical Field

[0001] The present application relates to the technical field of forklifts, and in particular to a forklift. Background Art

[0002] Forklifts are widely used in warehouses, docks, airports, etc. They are versatile, flexible and efficient material handling equipment. Forklifts usually have a pair of forks, which hold the goods through the horizontal section of the forks, and realize operations such as stacking and loading and unloading of goods by lifting and tilting.

[0003] In the field of magnetic material production, forklifts are used to transport magnetic materials to the sintering furnace. When the forklift is unloading, the fork of the forklift will drop vertically along the body of the forklift and abut against the bottom frame of the forklift. The fork cannot stop in the middle. During this process, the fork is likely to abut against the carbon felt at the mouth of the sintering furnace. In the sintering furnace, carbon felt is mainly used to protect the furnace wall and the top of the furnace to prevent heat radiation and heat transfer under high temperature from damaging the furnace body. When the carbon felt is squeezed by the fork, the carbon felt is easily damaged, resulting in damage to the sintering furnace body. Utility Model Content

[0004] In order to solve the problem that the fork cannot stop during the descending process of unloading and the fork is easy to contact with the carbon felt of the sintering furnace and cause damage to the carbon felt, the present application provides a forklift.

[0005] The forklift provided in this application adopts the following technical solution:

[0006] A forklift, comprising a body frame, an underframe connected to the body frame, and a fork vertically sliding on the body frame, and also comprising a limiting mechanism for limiting the lifting height of the fork, wherein the limiting mechanism comprises a fixing pin horizontally slidingly arranged on a side wall of the body frame and a limiting block arranged on the side wall of the fork;

[0007] The fork has a released state and a raised state, and the fixed pin has a limited state and a retracted state; when the fork is in the raised state, the fork slides to the top of the vehicle body frame; when the fork is in the released state and the fixed pin is in the limited state, the limit block abuts against the fixed pin, and a clearance is provided between the fork and the vehicle bottom frame; when the fork is in the released state and the fixed pin is in the retracted state, the limit block does not abut against the fixed pin, and the fork abuts against the vehicle bottom frame.

[0008] By adopting the above technical solution, the cooperation between the limit block and the fixed pin can adjust the distance that the fork is lowered. When the forklift is used to transport magnetic materials into the sintering furnace, the fixed pin is adjusted to the limit state. At this time, the fork can abut against the fixed pin when it descends. There is always a clearance between the fork and the chassis, which makes it difficult for the fork to directly contact the carbon felt of the sintering furnace and the fork to crush the carbon felt; when the forklift is used for other purposes, the fixed pin is adjusted to the retracted state. At this time, the fork can return to the state of abutting against the chassis. Switching between the two states is relatively easy and practical.

[0009] Optionally, the limiting mechanism also includes a mounting tube horizontally arranged on the side wall of the vehicle body frame and a fixing seat symmetrically arranged on the upper and lower sides of the mounting tube, and a locking piece is passed through the fixing seat and connected, and the locking piece is threadedly connected to the vehicle body frame and presses the fixing seat to the vehicle body frame; the fixing pin is horizontally passed through the mounting tube, and the fixing pin is installed on the vehicle body frame through the mounting tube.

[0010] By adopting the above technical solution, when installing the fixing pin, the fixing pin is first installed in the installation tube, and then the installation tube and the fixing seat are installed on the body frame by means of threaded connection between the locking piece and the body frame. There is no need to perform operations such as grooving and drilling on the body frame, and disassembly and assembly are relatively convenient.

[0011] Optionally, the fixing seat is provided with a sliding groove, the locking member is passed through the sliding groove, and the mounting tube and the fixing seat slide vertically on the vehicle body frame.

[0012] By adopting the above technical solution, the locking part can slide in the sliding groove, so that the limiting mechanism can vertically adjust the position on the body frame, and the height of the clearance can be adjusted. When the forklift is used to transport magnetic materials, the forklift can better cooperate with the height of the furnace body of the sintering furnace and is not easy to cause damage to the carbon felt of the furnace body.

[0013] Optionally, the locking member includes a screw portion, a sliding portion connected to the screw portion, and a clamping portion connected to the sliding portion and away from the screw portion, the screw portion is threadedly connected to the vehicle body frame, the clamping portion abuts against the fixing seat, and retreat grooves are symmetrically provided on both sides of the sliding portion; the fixing seat is provided with gear holes spaced apart along the length direction of the sliding groove, and the gear holes are connected to the sliding groove; the diameter of the sliding portion is greater than the width of the sliding groove.

[0014] By adopting the above technical solution, when the locking piece is located in the gear hole, if the side wall of the sliding part is not parallel to the inner wall of the sliding groove, the locking piece can be locked in the gear hole, the limiting mechanism is locked on the vehicle body frame, and when the fork is pressed on the fixing pin, it is not easy to slip between the limiting mechanism and the vehicle body frame; when the locking piece is rotated, if the side wall of the sliding part is parallel to the side wall of the sliding groove, the sliding part of the locking piece can slide in the sliding groove, and the height of the limiting mechanism can be adjusted at this time, which is more convenient.

[0015] Optionally, a hand-tightening piece is provided on the top of the pressing portion, and the hand-tightening piece is parallel to the inner wall of the retreat groove.

[0016] By adopting the above technical solution, the operator can conveniently adjust the angle of the locking piece by holding the hand-tightening piece; and because the side wall of the sliding portion is parallel to the side wall of the hand-tightening piece, the angle of the sliding portion in the locking piece can be known by observing the angle of the hand-tightening piece; when the locking piece needs to be unlocked, the side wall of the hand-tightening piece is adjusted to be parallel to the inner wall of the sliding groove, and at this time, the limiting mechanism can vertically adjust the position on the vehicle body frame, which is more convenient.

[0017] Optionally, the limiting mechanism also includes a driving spring, which is sleeved on the outside of the fixing pin, one end of the driving spring is connected to the mounting tube, and the other end of the driving spring is connected to the fixing pin, and the driving spring drives the fixing pin to always be in a limited state.

[0018] By adopting the above technical solution, there is no need for operators to perform frequent adjustments. The driving spring always drives the fixing pin to a limited state. When the forklift is used to transport magnetic materials, it can avoid the situation where the fixing pin is not adjusted to the limited state and the fork crushes the carbon felt.

[0019] Optionally, the drive spring is located in the mounting cylinder.

[0020] By adopting the above technical solution, the drive spring is arranged in the installation tube, so that the drive spring can be protected and is not easily damaged.

[0021] Optionally, a rotating handle is provided at one end of the fixing pin; an end of the mounting tube close to the rotating handle has an arc-shaped guide surface, and the rotating handle has an arc-shaped portion that cooperates with the arc-shaped guide surface.

[0022] By adopting the above technical solution, when adjusting the state of the fixing pin, by rotating the rotating handle up and down, the arc-shaped portion of the rotating handle can slide along the arc-shaped guide surface of the mounting tube, thereby converting the circumferential rotation of the fixing pin into horizontal movement, so that the fixing pin can be switched between the limiting state and the retracted state more easily.

[0023] Optionally, a locking block is provided at one end of the mounting tube close to the rotating handle, and the rotating handle is provided with a locking groove. When the fixing pin is in a retracted state, the locking block is engaged with the locking groove.

[0024] By adopting the above technical solution, when the fixing pin is in the retracted state, due to the pulling force of the driving spring, the fixing pin is likely to return to the limited state. Through the cooperation of the locking block and the locking groove, the fixing pin can be locked in the retracted state, so that the fixing pin is not easy to automatically change its state during the use of the forklift.

[0025] In summary, the present application includes at least one of the following beneficial technical effects:

[0026] 1. A forklift, by arranging a limit mechanism on the forklift, when the fork is lowered, the limit block on the fork can be limited by the fixing pin on the vehicle frame, so that there is a clearance between the fork and the vehicle frame, and when the forklift is used to transport magnetic materials, the fork is not easy to damage the carbon felt of the sintering furnace;

[0027] 2. By providing a sliding groove and a shift hole on the fixed seat, the limit mechanism can slide on the locking member, so that the limit mechanism can be vertically adjusted on the body frame, so that the fork can adapt to the furnace body of the sintering furnace;

[0028] 3. By arranging a driving spring in the installation cylinder, the driving spring can drive the fixing pin to always be in a limited state, so that the operator does not need to frequently operate the limiting mechanism, which is more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the overall structure of a forklift according to an embodiment of the present application.

[0030] Figure 2 It is a schematic diagram of the structure of the limiting mechanism of an embodiment of the present application.

[0031] Figure 3 It is a schematic diagram of the structure of the locking member of an embodiment of the present application.

[0032] Figure 4 It is a schematic diagram of the structure of the fixing pin of an embodiment of the present application.

[0033] Explanation of the reference numerals in the accompanying drawings: 1. vehicle body frame; 2. underframe; 3. fork; 4. limiting mechanism; 41. limiting block; 42. mounting seat; 421. mounting cylinder; 4211. arc-shaped guide surface; 4212. locking block; 422. fixing seat; 4221. sliding groove; 4222. gear hole; 423. locking member; 4231. screw portion; 4232. sliding portion; 4233. pressing portion; 4234. retreat groove; 4235. hand-tightening piece; 43. fixing pin; 431. rotating handle; 432. arc-shaped portion; 433. locking groove; 44. driving spring; 45. clearance. DETAILED DESCRIPTION

[0034] The following is combined with Figure 1-4 This application is described in further detail.

[0035] The embodiment of the present application discloses a forklift.

[0036] Reference Figure 1 A forklift includes a body frame 1, a chassis 2, a fork 3 and a limiting mechanism 4. The fork 3 is used to support and lift the cargo. The body frame 1 and the chassis 2 are connected as one piece, the body frame 1 is vertically arranged, and the chassis 2 is horizontally arranged. The chassis 2 is integrated with rollers, and the chassis 2 is used to drive the forklift to move and to support the fork 3. The body frame 1 is integrated with components such as a controller and a motor, and the body frame 1 is used to drive the fork 3 to rise and fall vertically, and the limiting mechanism 4 is used to control the lifting distance of the fork 3 on the body frame 1. The fork 3 has a released state and a lifted state. When the fork 3 is in the lifted state, the fork 3 slides to the top of the body frame 1, and the fork 3 can lift the cargo. When the fork 3 is in the released state, the fork 3 moves downward to the lower end of the body frame 1, and the cargo on the fork 3 can be unloaded.

[0037] Reference Figure 1 and Figure 2 The limiting mechanism 4 includes a limiting block 41 , a mounting seat 42 , a fixing pin 43 and a driving spring 44 .

[0038] The limiting block 41 is a square block, which is integrally welded to the side wall of the fork 3 .

[0039] The mounting seat 42 includes a mounting tube 421 and a fixing seat 422. The mounting tube 421 is a circular sleeve with openings at both ends, and the mounting tube 421 is horizontally arranged on the side wall of the vehicle body frame 1. The fixing seat 422 is a square thin plate, symmetrically welded on the upper and lower sides of the mounting tube 421. A locking member 423 is provided on the fixing seat 422, and the locking member 423 is threadedly connected to the vehicle body frame 1 and presses the fixing seat 422 on the vehicle body frame 1. The mounting seat 42 is installed on the side wall of the vehicle body frame 1 through the locking member 423.

[0040] The fixed seat 422 is provided with a sliding groove 4221, which penetrates the front and rear surfaces of the fixed seat 422. The sliding groove 4221 is a rectangular groove and is arranged along the height direction of the fixed seat 422. The fixed seat 422 is provided with a gear hole 4222, which is arranged at intervals along the length direction of the sliding groove 4221, and the gear hole 4222 is connected to the sliding groove 4221. The diameter of the gear hole 4222 is greater than the width of the sliding groove 4221.

[0041] Reference Figure 2 and Figure 3 The locking member 423 includes a screw portion 4231, a sliding portion 4232 connected to one end of the screw portion 4231, and a pressing portion 4233 connected to the sliding portion 4232 and away from the screw portion 4231. The screw portion 4231, the sliding portion 4232, and the pressing portion 4233 are all cylindrical, the screw portion 4231 and the sliding portion 4232 have the same diameter, and the pressing portion 4233 has a larger diameter than the sliding portion 4232. The sliding portion 4232 has symmetrically disposed retreat grooves 4234 on both sides, and the cross section of the retreat grooves 4234 is arched, so that the cross section of the sliding portion 4232 is oval.

[0042] Reference Figure 1 and Figure 2 The diameter of the screw portion 4231 of the locking member 423 is equal to the diameter of the shift hole 4222, and the thickness of the sliding portion 4232 of the locking member 423 is less than or equal to the width of the sliding groove 4221. When the locking member 423 is mounted on the vehicle body frame 1, the screw portion 4231 is threadedly connected to the vehicle body frame 1, the sliding portion 4232 is located in the sliding groove 4221, and the pressing portion 4233 abuts against the surface of the fixing seat 422.

[0043] The locking member 423 can move in the sliding groove 4221, so that the mounting seat 42 can move vertically on the vehicle body frame 1 to adjust the position of the mounting seat 42 on the vehicle body frame 1. When the sliding portion 4232 of the locking member 423 is located in the shift hole 4222, and the side wall of the sliding portion 4232 is staggered with the inner wall of the sliding groove 4221, the locking member 423 is locked in the shift hole 4222 and the fixing seat 422 is pressed against the vehicle body frame 1, and the mounting seat 42 cannot move on the vehicle body frame 1. The angle of the locking member is adjusted, and when the side wall of the sliding portion 4232 is parallel to the inner wall of the sliding groove 4221, the locking member 423 can move in the sliding groove 4221, and the mounting seat 42 can move on the vehicle body frame 1.

[0044] Reference Figure 2 and Figure 3In order to facilitate the operator to rotate the locking member 423, a hand-tightening piece 4235 is welded on the top of the pressing portion 4233. The hand-tightening piece 4235 is a square thin piece. The operator can rotate the locking member 423 by pinching the hand-tightening piece 4235. In addition, the side wall of the hand-tightening piece 4235 is parallel to the side wall of the sliding portion 4232. When the operator rotates the locking member 423, by observing the angle of the hand-tightening piece 4235, the operator can intuitively understand the angle of the sliding portion 4232.

[0045] Reference Figure 2 and Figure 4 The fixing pin 43 is inserted into the mounting tube 421, and the fixing pin 43 can be telescopically moved horizontally in the mounting tube 421. A rotating handle 431 is provided at one end of the fixing pin 43, and an arc portion 432 is provided at the connection between the fixing pin 43 and the rotating handle 431. The mounting tube 421 has an arc guide surface 4211 at one end close to the rotating handle 431, and the arc guide surface 4211 cooperates with the arc portion 432, and the arc portion 432 can rotate on the arc guide surface 4211. The operator can make the fixing pin 43 move horizontally by rotating the rotating handle 431 up and down.

[0046] The fixing pin 43 has a limited state and a retracted state. When the fixing pin 43 is in the limited state, the arc portion 432 is completely consistent with the arc guide surface 4211, and one end of the fixing pin 43 extends out of the installation tube 421. When the fixing pin 43 is in the retracted state, the arc portion 432 is staggered with the arc guide surface 4211, and the end of the fixing pin 43 is retracted into the installation tube 421.

[0047] In order to prevent the fixing pin 43 from being easily switched to the limited state when in the retracted state, the installation tube 421 is provided with a locking block 4212 at one end close to the rotating handle 431, and the rotating handle 431 is provided with a locking groove 433 at one end facing the installation tube 421, and the locking block 4212 can be engaged with the locking groove 433. When the fixing pin 43 is in the retracted state, the locking block 4212 is engaged with the locking groove 433, and the fixing pin 43 is locked in the retracted state.

[0048] Reference Figure 2 The driving spring 44 is sleeved on the outside of the fixing pin 43 and is located in the mounting tube 421. One end of the driving spring 44 is connected to the fixing pin 43, and the other end is connected to the mounting tube 421. The driving spring 44 drives the fixing pin 43 to always have a tendency to return to the limited state.

[0049] Reference Figure 1 and Figure 2When the forklift is used to transport magnetic materials, the operator switches the fixing pin 43 of the limiting mechanism 4 to the limiting state. At this time, when the fork 3 returns to the released state from the raised state, the limiting block 41 abuts against the fixing pin 43, and the fork 3 cannot slide to contact the vehicle frame 2. A clearance gap 45 is formed between the fork 3 and the vehicle frame 2, so that when the fork 3 is raised or lowered in the sintering furnace, the fork 3 is not easy to be directly pressed on the carbon felt, thereby protecting the carbon felt.

[0050] When the forklift is used for other purposes, the fixing pin 43 of the limiting mechanism 4 switches to the retracted state. At this time, the end of the fixing pin 43 is located in the mounting tube 421, and the fixing pin 43 is not easy to limit the limiting block 41, so that when the fork 3 switches from the lifting state to the releasing state, the fork 3 can directly slide to abut against the vehicle frame 2.

[0051] Combination Figures 1 to 4 The implementation principle of a forklift in the embodiment of the present application is as follows: the cooperation between the limit block 41 and the fixed pin 43 can adjust the descending distance of the fork 3. When the forklift is used to transport magnetic materials into the sintering furnace, the fixed pin 43 is adjusted to the limit state, at which time the fork 3 can abut against the fixed pin 43 when it descends, and there is always a clearance gap 45 between the fork 3 and the vehicle frame 2. When the forklift is used for other purposes, the fixed pin 43 is adjusted to the retracted state, at which time the fork 3 can return to the state of abutting against the vehicle frame 2 normally.

[0052] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A forklift, comprising a body frame (1), an underframe (2) connected to the body frame (1), and a fork (3) vertically sliding on the body frame (1), characterized in that: It also includes a limiting mechanism (4) for limiting the lifting height of the fork (3), the limiting mechanism (4) comprising a fixing pin (43) horizontally slidably arranged on the side wall of the vehicle frame (1) and a limiting block (41) arranged on the side wall of the fork (3); The fork (3) has a released state and a raised state, and the fixed pin (43) has a limited state and a retracted state. When the fork (3) is in the raised state, the fork (3) slides to the top of the vehicle frame (1). When the fork (3) is in the released state and the fixed pin (43) is in the limited state, the limited block (41) abuts against the fixed pin (43), and a clearance gap (45) is provided between the fork (3) and the vehicle frame (2). When the fork (3) is in the released state and the fixed pin (43) is in the retracted state, the limited block (41) does not abut against the fixed pin (43), and the fork (3) abuts against the vehicle frame (2).

2. A forklift according to claim 1, characterized in that: The limiting mechanism (4) further comprises a mounting tube (421) horizontally arranged on a side wall of the vehicle body frame (1) and a fixing seat (422) symmetrically arranged on upper and lower sides of the mounting tube (421); a locking member (423) is passed through and connected to the fixing seat (422); the locking member (423) is threadedly connected to the vehicle body frame (1) and presses the fixing seat (422) against the vehicle body frame (1); the fixing pin (43) is passed through the mounting tube (421) horizontally; the fixing pin (43) is installed on the vehicle body frame (1) through the mounting tube (421).

3. A forklift according to claim 2, characterized in that: The fixing seat (422) is provided with a sliding groove (4221), the locking member (423) is inserted into the sliding groove (4221), and the mounting tube (421) and the fixing seat (422) are vertically slidable on the vehicle body frame (1).

4. A forklift according to claim 3, characterized in that: The locking member (423) comprises a screw portion (4231), a sliding portion (4232) connected to the screw portion (4231), and a pressing portion (4233) connected to the sliding portion (4232) and away from the screw portion (4231); the screw portion (4231) is threadedly connected to the vehicle body frame (1); the pressing portion (4233) abuts against the fixing seat (422); two sides of the sliding portion (4232) are symmetrically provided with retreat grooves (4234); the fixing seat (422) is provided with shift holes (4222) at intervals along the length direction of the sliding through groove (4221); the shift holes (4222) are connected to the sliding through groove (4221); the diameter of the sliding portion (4232) is greater than the width of the sliding through groove (4221).

5. A forklift according to claim 4, characterized in that: A hand-tightening piece (4235) is provided at the top of the pressing portion (4233), and the hand-tightening piece (4235) is parallel to the inner wall of the retreat groove (4234).

6. A forklift according to claim 2, characterized in that: The limiting mechanism (4) further comprises a driving spring (44), wherein the driving spring (44) is sleeved on the outside of the fixing pin (43), one end of the driving spring (44) is connected to the mounting tube (421), and the other end of the driving spring (44) is connected to the fixing pin (43), and the driving spring (44) drives the fixing pin (43) to always be in a limiting state.

7. A forklift according to claim 6, characterized in that: The driving spring (44) is located in the mounting cylinder (421).

8. A forklift according to claim 6, characterized in that: A rotating handle (431) is provided at one end of the fixing pin (43); an end of the mounting tube (421) close to the rotating handle (431) has an arc-shaped guide surface (4211), and the rotating handle (431) has an arc-shaped portion (432) that cooperates with the arc-shaped guide surface (4211).

9. A forklift according to claim 8, characterized in that: A locking block (4212) is provided at one end of the installation cylinder (421) close to the rotating handle (431). The rotating handle (431) is provided with a locking groove (433). When the fixing pin (43) is in a retracted state, the locking block (4212) is engaged with the locking groove (433).

Images