Waist support of forklift

Abstract

The utility model discloses a waist support of a forklift truck, which comprises an adjusting unit, a waist support unit, a waist support unit, a waist support unit, a waist support unit, a waist support unit and a waist support unit, and the first locking block and the second locking block are arranged on a rotating shaft; the judging unit comprises a first distance sensor and a second distance sensor which are fixedly arranged on the mounting frame, and a first trigger block and a second trigger block which are arranged on the rotating shaft, and the first trigger block and the second trigger block can rotate along with the rotating shaft, so that the first distance sensor directly faces the rotating shaft or the first trigger block, and the second distance sensor directly faces the second trigger block; or the second distance sensor directly faces the rotating shaft or the second trigger block. In the angle adjusting process, the first distance sensor always faces the first trigger block, and the second distance sensor always faces the second trigger block. Therefore, the signals collected by the first distance sensor and the second distance sensor do not change, and the phenomenon that the sensors misjudge in the angle adjusting process of the waist support is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of forklifts, in particular to a waist protector for forklifts. Background Art

[0002] A forklift is a tool used to carry goods. The waist guard on the forklift plays a role in protecting the driver's safety, stabilizing the driver's posture during driving and preventing the driver from shaking too much and causing danger. In order to further improve the safety of the forklift during driving, it is necessary to associate the position of the waist guard with the driving state of the forklift. Based on this, it is necessary to determine the position of the waist guard in real time.

[0003] The existing method of determining the position of the waist guard is to set an angle sensor at the waist guard shaft, collect the angle of the waist guard shaft through the angle sensor, and then determine the position of the waist guard. When the waist guard adjusts its angle to adapt to drivers of different heights, the waist guard shaft also needs to rotate a certain angle, resulting in the angle change collected by the angle sensor affecting the driving state of the forklift, which is not conducive to the stable driving of the forklift. Summary of the invention

[0004] In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the present invention is to propose a waist protector for a forklift, which is used to solve the problem that when the angle of the waist protector is adjusted in the prior art, the angle sensor also rotates accordingly, which easily leads to misjudgment of the waist protector position.

[0005] The technical solution adopted by the utility model to solve the technical problem is a waist protector for a forklift, the forklift also includes a mounting frame, the waist protector includes a rotating shaft and hand guards arranged at both ends of the rotating shaft, the rotating shaft is rotatably connected to the mounting frame, and the waist protector includes:

[0006] The adjusting unit comprises: a first locking block arranged on the rotating shaft, the first locking block being provided with a plurality of locking notches in sequence along the rotating direction thereof; a second locking block being movably arranged on the mounting frame, the second locking block being provided with at least one locking protrusion; wherein the end of the first locking block abuts against the end of the second locking block to limit the waist protector from rotating downward, and the locking protrusion extends into any of the locking notches to limit the waist protector from rotating in any direction;

[0007] The determination unit comprises: a first distance sensor and a second distance sensor fixedly arranged on the mounting frame, and a first trigger block and a second trigger block arranged on the rotating shaft, wherein the first trigger block and the second trigger block can rotate along with the rotating shaft so that the first distance sensor is directly opposite to the rotating shaft or the first trigger block, or the second distance sensor is directly opposite to the rotating shaft or the second trigger block;

[0008] When the waist protector is facing upward, the first distance sensor is opposite to the first trigger block, and the second distance sensor is opposite to the rotating axis; when the waist protector is facing downward, the first distance sensor is opposite to the rotating axis, and the second distance sensor is opposite to the second trigger block; when the first locking block is connected to the second locking block, the first distance sensor is opposite to the first trigger block, and the second distance sensor is opposite to the second trigger block.

[0009] Furthermore, a first limit block is provided on the mounting frame, and a second limit block is provided on the rotating shaft, wherein the second limit block has a first limit end and a second limit end which are opposite to each other, and the first limit end or the second limit end can be abutted against the first limit block by rotating the waist protector;

[0010] When the first limit end abuts against the first limit block, the first distance sensor is opposite to the rotating axis, and the second distance sensor is opposite to the second trigger block; when the second limit end abuts against the first limit block, the first distance sensor is opposite to the first trigger block, and the second distance sensor is opposite to the rotating axis.

[0011] Furthermore, a gas spring is provided, one end of which is hinged to the waist guard, and the other end of which is hinged to the mounting frame. When the waist guard faces the front of the forklift, the gas spring can exert a force on the waist guard to rotate it downward.

[0012] Further, a first hinged portion is provided on the side wall of the rotating shaft, a second hinged portion is provided on the mounting frame, one end of the gas spring is hinged to the first hinged portion, and the other end is hinged to the second hinged portion, and the gas spring is used to provide thrust to the first hinged portion;

[0013] Wherein, when the waist guard faces the front of the forklift, the first hinged portion is located above the plane where the second hinged portion and the axis of the rotating shaft are located.

[0014] Furthermore, when the waist protector is facing downward, the first hinged portion is located above the plane where the second hinged portion and the axis of the rotating shaft are located;

[0015] When the waist protector faces upward, the first hinged portion is located below the plane where the second hinged portion and the axis of the rotating shaft are located.

[0016] Furthermore, the first trigger block and the second trigger block are both sector rings with a central angle of 90°, and the centers of the first trigger block and the second trigger block are located on the central axis of the rotating shaft.

[0017] Furthermore, the first distance sensor and the second distance sensor are arranged side by side on the mounting frame along the axial direction of the rotating shaft.

[0018] Further, the first trigger block and the second trigger block are arranged along the axial direction of the rotating shaft, the first trigger block and the second trigger block are arranged crosswise along the radial direction of the rotating shaft, and the projections of the first trigger block and the second trigger block on the cross section of the rotating shaft partially overlap.

[0019] Furthermore, a hinged seat is provided on the mounting frame, the second locking block is hinged to the hinged seat, and the second locking block rotates relative to the hinged seat so that the locking protrusion extends into or withdraws from any of the locking notches.

[0020] Furthermore, the hinge seat is also provided with a torsion spring for providing a preload force for causing the second locking block to rotate along the locking protrusion toward the locking notch.

[0021] Compared with the prior art, the utility model has at least the following beneficial effects:

[0022] During the angle adjustment process, that is, from the time when the end of the first locking block just contacts the end of the second locking block, until the locking protrusion extends into the locking notch, and until the first locking block and the second locking block are separated, the first distance sensor is always directly opposite to the first trigger block, and the second distance sensor is always directly opposite to the second trigger block. Therefore, the signals collected by the first distance sensor and the second distance sensor will not change, thus preventing the sensor from misjudging during the angle adjustment process of the waist protector. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of one viewing angle when the waist protector is horizontal in the embodiment;

[0024] Figure 2 It is a structural schematic diagram of another viewing angle when the waist protector is horizontal in the embodiment;

[0025] Figure 3 This is a schematic diagram of the structure of the waist protector facing downwards in the embodiment;

[0026] Figure 4 It is a structural schematic diagram of a determination unit in an embodiment;

[0027] Figure 5 It is a structural schematic diagram of the adjustment unit in the embodiment;

[0028] Figure 6 Schematic diagram of the structure of the first trigger block and the second trigger block in the embodiment;

[0029] In the figure:

[0030] 100, waist protector; 110, rotating shaft; 111, first hinged portion; 120, hand guard; 130, first trigger block; 140, second trigger block;

[0031] 200, mounting frame; 210, second hinged portion; 220, first distance sensor; 230, second distance sensor;

[0032] 300, first locking block; 310, locking notch;

[0033] 400, second locking block; 410, locking protrusion; 420, hinge seat; 421, torsion spring;

[0034] 500, first limit block;

[0035] 600, second limit block;

[0036] 700, a dial handle; 710, a connecting portion; 720, a moving portion;

[0037] 800. Gas spring. DETAILED DESCRIPTION

[0038] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0039] Please refer to Figure 1-Figure 6 The utility model discloses a waist protector for a forklift, the forklift further comprising a mounting frame 200, the waist protector 100 comprising a rotating shaft 110 and hand guards 120 arranged at both ends of the rotating shaft 110, the rotating shaft 110 is rotatably connected to the mounting frame 200, and the waist protector 100 comprises:

[0040] The adjusting unit comprises: a first locking block 300 arranged on the rotating shaft 110, wherein the first locking block 300 is provided with a plurality of locking notches 310 in sequence along the rotating direction thereof; a second locking block 400 movably arranged on the mounting frame 200, wherein the second locking block 400 is provided with at least one locking protrusion 410; wherein the end of the first locking block 300 abuts against the end of the second locking block 400 to limit the waist protector 100 from rotating downward, and the locking protrusion 410 extends into any of the locking notches 310 to limit the waist protector 100 from rotating in any direction;

[0041] A determination unit, comprising: a first distance sensor 220 and a second distance sensor 230 fixedly disposed on the mounting frame 200, and a first trigger block 130 and a second trigger block 140 disposed on the rotating shaft 110, wherein the first trigger block 130 and the second trigger block 140 can rotate along with the rotating shaft 110, so that the first distance sensor 220 is directly opposite to the rotating shaft 110 or the first trigger block 130, or the second distance sensor 230 is directly opposite to the rotating shaft 110 or the second trigger block 140;

[0042] When the waist protector 100 is facing upward, the first distance sensor 220 is opposite to the first trigger block 130, and the second distance sensor 230 is opposite to the rotating shaft 110; when the waist protector 100 is facing downward, the first distance sensor 220 is opposite to the rotating shaft 110, and the second distance sensor 230 is opposite to the second trigger block 140; when the first locking block 300 is connected to the second locking block 400, the first distance sensor 220 is opposite to the first trigger block 130, and the second distance sensor 230 is opposite to the second trigger block 140.

[0043] Specifically, the present application sets a first locking block 300 on the rotating shaft 110, and sets a second locking block 400 on the mounting frame 200. When the end of the first locking block 300 is rotated to just contact the end of the second locking block 400, the waist protector 100 can no longer be rotated downward; when the height of the waist protector 100 needs to be further lowered, the second locking block 400 is first removed to allow the waist protector 100 to continue to rotate downward, and then the locking protrusion 410 on the second locking block 400 is inserted into the locking notch 310 to lock the height of the waist protector 100. In this way, the height / angle of the waist protector 100 is adjusted to meet the needs of drivers of different heights. Among them, each locking notch 310 corresponds to a different height of the waist protector 100.

[0044] A first trigger block 130 and a second trigger block 140 are arranged on the rotating shaft 110, and a first distance sensor 220 and a second distance sensor 230 are arranged on the mounting frame 200. Since the first trigger block 130 and the second trigger block 140 are arranged on the peripheral wall of the rotating shaft 110, the first trigger block 130 and the second trigger block 140 are arranged to protrude from the peripheral wall of the rotating shaft 110. When the trigger block is directly in front of the distance sensor, the distance between the trigger block and the distance sensor is small, and the distance sensor can be triggered; when the trigger block is not directly in front of the distance sensor, the distance sensor is directly opposite to the peripheral wall of the rotating shaft 110, and the distance between the peripheral wall of the rotating shaft 110 and the distance sensor is large, and the distance sensor cannot be triggered. In this way, the first trigger block and the second trigger block rotate to different positions following the rotation of the waist protector 100, thereby triggering or not triggering the first distance sensor 220 and the second distance sensor 230, so as to realize the upward, horizontal and downward angle determination of the waist protector 100, so as to replace the original solution of determination by the angle sensor. At the same time, since the first distance sensor 220 and the second distance sensor 230 are fixedly arranged on the mounting frame 200 and do not rotate with the rotating shaft 110, their service life is longer and the determination is more accurate.

[0045] It is important that during the process of angle adjustment, that is, from the moment when the end of the first locking block 300 and the end of the second locking block 400 just come into contact, until the locking protrusion 410 extends into the locking notch 310, and until the first locking block 300 and the second locking block 400 are separated, the first distance sensor 220 is always directly opposite to the first trigger block 130, and the second distance sensor 230 is always directly opposite to the second trigger block 140. Therefore, the signals collected by the first distance sensor 220 and the second distance sensor 230 will not change, thus preventing the waist protector 100 from misjudging by sensors during the angle adjustment process.

[0046] Furthermore, a first limit block 500 is provided on the mounting frame 200, and a second limit block 600 is provided on the rotating shaft 110. The second limit block 600 has a first limit end and a second limit end which are opposite to each other. Rotating the waist protector 100 can make the first limit end or the second limit end abut against the first limit block 500.

[0047] When the first limit end abuts against the first limit block 500, the first distance sensor 220 is opposite to the rotating shaft 110, and the second distance sensor 230 is opposite to the second trigger block 140; when the second limit end abuts against the first limit block 500, the first distance sensor 220 is opposite to the first trigger block 130, and the second distance sensor 230 is opposite to the rotating shaft 110.

[0048] The first limit block 500 and the second limit block 600 are provided to limit the waist protector 100 at the upper and lower extreme positions; the first locking block 300 and the second locking block 400 are provided to slightly adjust the height and angle of the waist protector 100 when it is in a flat position.

[0049] Specifically, when the first limit end abuts against the first limit block 500, the waist protector 100 faces downward, the first distance sensor 220 faces the rotating shaft 110, and the second distance sensor 230 faces the second trigger block 140; when the second limit section abuts against the first limit block 500, the waist protector 100 faces upward, the first distance sensor 220 faces the first trigger block 130, and the second distance sensor 230 faces the rotating shaft 110.

[0050] Furthermore, a gas spring 800 is provided, one end of which is hinged to the waist protector 100, and the other end of which is hinged to the mounting frame 200. When the waist protector 100 faces the front of the forklift, the gas spring 800 can exert a force on the waist protector 100 to rotate it downward.

[0051] It should be noted that when the end of the first locking block 300 just contacts the end of the second locking block 400, although the waist protector 100 cannot continue to rotate downward at this time, when the forklift is traveling on a bumpy road, the waist protector 100 is easily lifted up and rotated upward by the up and down bouncing of the forklift, which can easily cause danger to the driver.

[0052] Based on this, the present application sets a gas spring 800. When the waist protector 100 is facing the front of the forklift, the gas spring 800 can apply a force to the waist protector 100 to make it rotate downward, thereby preventing the waist protector 100 from jumping up and down with the forklift, so that the end of the first locking block 300 always abuts against the end of the second locking block 400, thereby enhancing the stability of the waist protector 100 in this position.

[0053] During the horizontal rotation between the upper and lower extreme positions, the gas spring 800 is gradually compressed. During this rotation, the force exerted by the gas spring 800 on the waist protector 100 gradually increases, thereby providing a damping effect on the rotation of the waist protector 100 to prevent the waist protector 100 from rotating rapidly and causing the first locking block 300 and the second locking block 400 to collide.

[0054] At the same time, when the waist protector rotates from a horizontal direction to an upward or downward direction, the gas spring slowly rebounds, and the rebound speed is lower than the rotation speed of the waist protector, thereby being able to pull the waist protector and provide a damping effect on the waist protector, preventing the waist protector from rotating too fast and avoiding collision between the first limit block and the second limit block.

[0055] Further, a first hinged portion 111 is provided on the side wall of the rotating shaft 110, a second hinged portion 210 is provided on the mounting frame 200, one end of the gas spring 800 is hinged to the first hinged portion 111, and the other end is hinged to the second hinged portion 210, and the gas spring 800 is used to provide thrust to the first hinged portion 111;

[0056] When the waist protector 100 faces the front of the forklift, the first hinged portion 111 is located above the plane where the second hinged portion 210 and the axis of the rotating shaft 110 are located.

[0057] Specifically, the plane where the axis of the second hinge part 210 and the rotating shaft 110 are located can be defined as the reference plane. When the first hinge part 111 is above the reference plane, and because the gas spring 800 applies an outward thrust rather than an inward pull, the thrust is bound to be converted into a force that can cause the rotating shaft 110 to rotate downward, ultimately achieving the purpose of preventing the waist protector 100 from jumping up and down.

[0058] Furthermore, when the waist protector 100 is facing downward, the first hinged portion 111 is located above the plane where the second hinged portion 210 and the axis of the rotating shaft 110 are located;

[0059] When the waist protector 100 faces upward, the first hinge portion 111 is located below the plane where the second hinge portion 210 and the axis of the rotating shaft 110 are located.

[0060] Specifically, when the waist protector 100 is facing downward, the first hinge 111 is above the reference plane, so that the gas spring 800 still exerts a force on the waist protector 100 to rotate it downward, thereby preventing it from bouncing upward with the up and down movement of the forklift. When the waist protector 100 is facing upward, the first hinge 111 is below the reference plane, and the gas spring 800 exerts a force on the waist protector 100 to rotate it upward, thereby preventing the waist protector 100 from falling downward with the movement of the forklift when it is facing upward.

[0061] Furthermore, the first trigger block 130 and the second trigger block 140 are both fan rings with a central angle of 90°, and the centers of the first trigger block 130 and the second trigger block 140 are located on the central axis of the rotating shaft 110 .

[0062] The first trigger block 130 and the second trigger block 140 are set to a 90° fan ring, and the center of the trigger block is on the axis of the rotating shaft 110, so that when the waist protector 100 rotates from the downward state to the horizontal state, the second trigger block 140 is always in front of the second distance sensor 230, and the minimum distance from the surface of the second trigger block 140 to the second distance sensor 230 is always equal, and the trigger state of the second distance sensor 230 is maintained. Similarly, when the waist protector 100 rotates from the horizontal state to the upward state, the first trigger block 130 is always in front of the first distance sensor 220, and the minimum distance from the surface of the first trigger block 130 to the first distance sensor 220 is always equal, and the trigger state of the first distance sensor 220 is maintained.

[0063] Furthermore, the first trigger block 130 and the second trigger block 140 are fixedly connected, which is convenient for processing and reduces costs.

[0064] Furthermore, the first distance sensor 220 and the second distance sensor 230 are arranged side by side on the mounting bracket 200 along the axial direction of the rotating shaft 110 .

[0065] Further, the first trigger block 130 and the second trigger block 140 are arranged along the axial direction of the rotating shaft 110, the first trigger block 130 and the second trigger block 140 are cross-arranged along the radial direction of the rotating shaft 110, and the projections of the first trigger block and the second trigger block on the cross section of the rotating shaft 110 partially overlap.

[0066] Specifically, the first trigger block and the second trigger block have a partially overlapping area on the cross section of the rotating shaft 110, and the first trigger block and the second trigger block can respectively trigger the first distance sensor 220 and the second distance sensor 230 at the same time, thereby determining that the waist protector 100 is in a roughly horizontal position.

[0067] Furthermore, a hinge seat 420 is provided on the mounting frame 200 , the second locking block 400 is hinged to the hinge seat 420 , and the second locking block 400 rotates relative to the hinge seat 420 to allow the locking protrusion 410 to extend into or withdraw from any of the locking notches 310 .

[0068] Specifically, a hinge seat 420 is provided, and the second locking block 400 is rotatably provided on the hinge seat 420. By rotating the second locking block 400 relative to the hinge seat 420, the locking protrusion 410 on the second locking block 400 is driven to move up and down to extend into or out of the locking notch 310, thereby realizing the unlocking and locking of the waist protector 100.

[0069] Furthermore, the hinge seat 420 is provided with a torsion spring 421 for providing a preload force for the second locking block 400 to rotate along the locking protrusion 410 toward the locking notch 310 .

[0070] Specifically, a torsion spring 421 is provided, and when the lever 700 is released, the second locking block 400 can rotate under the elastic force of the torsion spring 421, so that the locking protrusion 410 can automatically extend into the locking notch 310. At the same time, after the locking protrusion 410 extends into the locking notch 310, the elastic force of the torsion spring 421 can make the locking protrusion 410 always abut against the locking notch 310, so as to enhance the locking strength of the waist protector 100.

[0071] Furthermore, a lever 700 is further included, and the lever 700 includes a connecting portion 710 and a shifting portion 720, and the connecting portion 710 is fixedly connected to the second locking block 400. The connecting portion 710 is fixedly connected to the second locking block 400, and the shifting portion 720 is used for applying force.

[0072] A lever 700 is provided, and the second locking block 400 is driven to rotate by turning the lever 700. Specifically, the lever 700 is fixedly connected to the second locking block 400, and the lever 700 has two functions: first, it is convenient to apply force and provide a force application space; second, it can increase the distance between the force application position and the rotation axis of the second locking block 400, thereby extending the lever arm to reduce the force required to be applied, so as to save effort.

[0073] Furthermore, when the waist protector 100 is downward, the forklift can travel slowly; when the waist protector 100 is horizontal, the forklift can travel quickly; when the waist protector 100 is upward, the forklift cannot travel.

[0074] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0075] In addition, in the present invention, the descriptions of "first", "second", "one", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0076] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0077] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

Claims

1. A waist guard for a forklift, the forklift further comprising a mounting frame, the waist guard comprising a rotating shaft and hand guards arranged at both ends of the rotating shaft, the rotating shaft and the mounting frame being rotatably connected, characterized in that: The waist protector comprises: The adjusting unit comprises: a first locking block arranged on the rotating shaft, the first locking block being provided with a plurality of locking notches in sequence along the rotating direction thereof; a second locking block being movably arranged on the mounting frame, the second locking block being provided with at least one locking protrusion; wherein the end of the first locking block abuts against the end of the second locking block to limit the waist protector from rotating downward, and the locking protrusion extends into any of the locking notches to limit the waist protector from rotating in any direction; The determination unit comprises: a first distance sensor and a second distance sensor fixedly arranged on the mounting frame, and a first trigger block and a second trigger block arranged on the rotating shaft, wherein the first trigger block and the second trigger block can rotate along with the rotating shaft so that the first distance sensor is directly opposite to the rotating shaft or the first trigger block, or the second distance sensor is directly opposite to the rotating shaft or the second trigger block; When the waist protector is facing upward, the first distance sensor is opposite to the first trigger block, and the second distance sensor is opposite to the rotating axis; when the waist protector is facing downward, the first distance sensor is opposite to the rotating axis, and the second distance sensor is opposite to the second trigger block; when the first locking block is connected to the second locking block, the first distance sensor is opposite to the first trigger block, and the second distance sensor is opposite to the second trigger block.

2. A waist protector for a forklift according to claim 1, characterized in that: A first limit block is also provided on the mounting frame, and a second limit block is also provided on the rotating shaft, wherein the second limit block has a first limit end and a second limit end which are opposite to each other, and the first limit end or the second limit end can be abutted against the first limit block by rotating the waist protector; When the first limit end abuts against the first limit block, the first distance sensor is opposite to the rotating axis, and the second distance sensor is opposite to the second trigger block; when the second limit end abuts against the first limit block, the first distance sensor is opposite to the first trigger block, and the second distance sensor is opposite to the rotating axis.

3. A waist protector for a forklift according to claim 1, characterized in that: A gas spring is also provided, one end of which is hinged to the waist guard and the other end is hinged to the mounting frame. When the waist guard faces the front of the forklift, the gas spring can exert a force on the waist guard to make it rotate downward.

4. A waist protector for a forklift according to claim 3, characterized in that: A first hinged portion is provided on the side wall of the rotating shaft, a second hinged portion is provided on the mounting frame, one end of the gas spring is hinged to the first hinged portion, and the other end is hinged to the second hinged portion, and the gas spring is used to provide thrust to the first hinged portion; Wherein, when the waist guard faces the front of the forklift, the first hinged portion is located above the plane where the second hinged portion and the axis of the rotating shaft are located.

5. A waist protector for a forklift according to claim 4, characterized in that: When the waist protector faces downward, the first hinged portion is located above the plane where the second hinged portion and the axis of the rotating shaft are located; When the waist protector faces upward, the first hinged portion is located below the plane where the second hinged portion and the axis of the rotating shaft are located.

6. A waist protector for a forklift according to claim 1, characterized in that: The first trigger block and the second trigger block are both sector rings with a central angle of 90°, and the centers of the first trigger block and the second trigger block are located on the central axis of the rotating shaft.

7. A waist protector for a forklift according to claim 6, characterized in that: The first distance sensor and the second distance sensor are arranged side by side on the mounting frame along the axial direction of the rotating shaft.

8. A waist protector for a forklift according to claim 7, characterized in that: The first trigger block and the second trigger block are arranged along the axial direction of the rotating shaft, the first trigger block and the second trigger block are arranged crosswise along the radial direction of the rotating shaft, and the projections of the first trigger block and the second trigger block on the cross section of the rotating shaft partially overlap.

9. The waist protector for a forklift according to claim 1, characterized in that: A hinged seat is also provided on the mounting frame, the second locking block is hinged to the hinged seat, and the second locking block rotates relative to the hinged seat to allow the locking protrusion to extend into or withdraw from any of the locking notches.

10. A waist protector for a forklift according to claim 9, characterized in that: The hinge seat is also provided with a torsion spring for providing a preload force for causing the second locking block to rotate along the locking protrusion toward the locking notch.

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