Seat armrest and carrier

Abstract

The invention relates to a seat armrest and a carrier, and the seat armrest comprises an up-down translation mechanism which comprises a first sliding assembly which is longitudinally arranged, and a first driving mechanism drives a first sliding block and a first guide rail to move relatively and drives the armrest to be adjusted up and down; the front-back translation mechanism comprises a transversely-arranged second sliding assembly, and a second driving mechanism drives a second sliding block and a second guide rail to move relatively and drives the handrail to be adjusted front and back; the transition support comprises a first connecting part and a second connecting part; the yawing mechanism comprises a telescopic driving mechanism, the fixed end of the telescopic driving mechanism is hinged to the first connecting part of the transition support, the telescopic end of the telescopic driving mechanism is hinged to the second connecting part of the transition support, and when the telescopic end of the telescopic driving mechanism acts, the handrail is driven to rotate up and down for adjustment. According to the scheme, the multi-degree-of-freedom electric control adjustment of lifting, front-back translation and rolling can be achieved in the narrow installation space of the forklift seat armrest.

Description

Technical Field

[0001] The present invention relates to the technical field of forklifts, and in particular to a seat armrest and a transport vehicle. Background Art

[0002] Currently, forklift seat armrests on the market generally suffer from insufficient adjustment freedom, supporting only one or a combination of adjustment methods: lift, fore-and-aft translation, and roll. Most forklift seat armrests on the market utilize mechanical adjustment mechanisms, which offer limited adjustability and pay little attention to mechanical stability and human control experience, resulting in low practicality. Mechanically adjusting seat armrests is laborious and lacks effective force direction in the confined cab space, making them somewhat insufficient for practical application.

[0003] Based on this, seat armrests with electronically controlled adjustment have also appeared on the market. For example, publication number CN114919478A discloses a forklift seat with a multifunctional armrest. A switch control module is installed on the front side of the seat armrest, enabling electronic adjustment of the seat armrest in both the lifting and fore-and-aft directions. However, this system still has the following drawbacks: the armrest is raised and lowered by rotating two support rods around a fixed rotation center, resulting in a large lifting structure. Moreover, the relative position of the front end of the armrest changes with each lifting adjustment, requiring additional fore-and-aft adjustment of the armrest. Summary of the Invention

[0004] In order to solve the above problems, the purpose of the present invention is to provide a seat armrest and a transporter, which can realize electric control adjustment of multiple degrees of freedom of lifting, front and rear translation and rolling in the narrow installation space of the forklift seat armrest.

[0005] A chair armrest, comprising:

[0006] The up-and-down translation mechanism includes a first sliding assembly arranged longitudinally, the first sliding assembly including a first guide rail arranged longitudinally, and a first slider slidably arranged on the first guide rail. The armrest is connected to the first sliding assembly via a transition support. The first driving mechanism drives the first slider to move relative to the first guide rail, thereby driving the armrest to adjust up and down.

[0007] The front-to-back translation mechanism includes a second sliding assembly arranged transversely, the second sliding assembly includes a second guide rail arranged transversely, and a second slider slidably arranged on the second guide rail. The front-to-back translation mechanism is arranged between the transition support and the armrest, and the second driving mechanism drives the second slider to move relative to the second guide rail, thereby driving the armrest to adjust forward and backward;

[0008] The transition support includes a first connecting portion and a second connecting portion, wherein the first connecting portion is connected to the up-and-down translation mechanism, and the second connecting portion is connected to the front-and-back translation mechanism, and one end of the first connecting portion is hinged to the second connecting portion to form a first hinge point;

[0009] The lateral swing mechanism includes a telescopic drive mechanism, the fixed end of the telescopic drive mechanism is hinged to the first connecting part of the transition support, and the telescopic end of the telescopic drive mechanism is hinged to the second connecting part of the transition support. The first connecting part, the second connecting part and the telescopic drive mechanism form a triangular support; when the telescopic end of the telescopic drive mechanism is in motion, the second connecting part of the transition support rotates with the first hinge point as the rotation center, driving the armrest to rotate up and down.

[0010] The seat armrest of the above structure can realize precise adjustment of the three degrees of freedom of up and down, front and back, and lateral swing through electric control, which significantly improves the operational flexibility and comfort. The triangular support structure and articulated design of the transition support enhance the overall stability, avoid the armrest from sinking or loosening during adjustment, and meet the needs of high-intensity operations. According to the above settings, the up and down translation mechanism can be directly used as the longitudinal support rod of the armrest, and the front and back translation mechanism can be directly set in the armrest box of the armrest. The up and down translation mechanism, the front and back translation mechanism, and the lateral swing mechanism are connected by the transition support. The structure is compact and occupies little space, which meets the requirements of small installation space for forklift armrests; and the adjustment of the three degrees of freedom will not interfere with each other, and the adjustment structure is reliable.

[0011] Preferably, the first drive mechanism, the second drive mechanism, and the telescopic drive mechanism are each provided with a self-locking structure for locking their adjusted positions. The self-locking function ensures that the adjusted positions are firmly fixed, preventing the armrest from shifting during operation, thereby improving safety and operational reliability.

[0012] Preferably, the first drive mechanism comprises a drive motor, a worm gear reduction box, and a lead screw, which drives the lifting mounting plate to slide along the first slide rail; and / or the second drive mechanism comprises a drive motor, a worm gear reduction box, and a lead screw, which drives the slider to slide along the second slide rail. The worm gear reduction box provides a high transmission ratio and reverse self-locking capability, and the lead screw drive achieves smooth and precise linear displacement control while being able to withstand pressure exceeding 100 kg, improving structural durability and adjustment accuracy.

[0013] Preferably, the system includes an armrest mounting bracket, one end of which is fixed to the seat and the other end of which folds upward. The vertical translation mechanism is mounted on the folded portion of the armrest mounting bracket, serving as the armrest's support rod. This folding armrest mounting bracket optimizes spatial layout, reduces structural redundancy within the cab, and enhances the support strength of the vertical translation mechanism, ensuring stability during longitudinal adjustment. Furthermore, the translation mechanism and the armrest mounting bracket directly connect and support the armrest to the seat, resulting in a compact structure.

[0014] Preferably, the first slider is installed through the first mounting seat, and the first mounting seat includes an armrest mounting portion and a transverse connecting portion. The armrest mounting portion is fixed to the folding portion of the armrest mounting seat, and the first slider is fixed to the armrest mounting portion; the transverse connecting portion is located below the first slide rail, and the drive motor and worm gear reducer in the first drive mechanism are installed at the lower end of the transverse connecting portion; the power output by the drive motor is output to the lead screw after being reversed by the worm gear reducer, and the lead screw in the first drive mechanism is connected to the first slide rail, and the lead screw is arranged along the moving direction of the first slider and the first slide rail, and the lead screw and the first slider are respectively located on opposite sides of the first slide rail. The transverse connecting portion is used to install the worm gear reducer, and the drive motor and the reducer housing are arranged perpendicular to the lead screw, and the lead screw is in the same direction as the first guide rail, resulting in a compact structure. The lead screw and the slider are arranged on opposite sides of the first slide rail, which can also make the overall structure more compact.

[0015] Preferably, a first stopper is provided at the lower portion of the first slide rail, which limits the first slider in a first sliding direction. The first slide rail cooperates with the transverse connecting portion to limit the first slider in a second sliding direction, wherein the first and second sliding directions are opposite. The transverse connecting portion also serves as a limiter for the first slider in one direction, resulting in a compact structure.

[0016] Preferably, the second sliding assembly includes a second mounting seat and a second stopper disposed on either side of the second slider in the sliding direction, each of which provides sliding limits for the second slider. The drive motor and worm gear reducer of the second drive mechanism are mounted on the second mounting seat. The two-sided stopper ensures the linear motion stability of the fore-aft translation mechanism, prevents the slider from drifting or derailing, and ensures the accuracy and reliability of fore-aft adjustment.

[0017] Preferably, the telescopic drive mechanism is an electric push rod that extends and retracts longitudinally. The longitudinal extension of the electric push rod directly drives the yaw angle adjustment, and combined with its self-locking and travel limit functions, it enables rapid and precise adjustment of the armrest rotation angle while reducing mechanical complexity.

[0018] Preferably, the armrest is provided with electric control switches corresponding to the up-down translation mechanism, the front-back translation mechanism and the lateral movement mechanism. The electric control switches are used to control the armrest to adjust the corresponding angles, support blind operation and improve the portability of operation.

[0019] Preferably, a forklift control module is located in front of the armrest and includes multiple control switches for controlling the forklift's movements. By integrating the forklift control switches (such as forward, lift, and emergency stop) with the armrest adjustment module, the operator can directly operate the forklift control switches by placing their arm on the armrest, reducing the operating range and improving operating comfort.

[0020] The present application also aims to provide a transport vehicle comprising a seat armrest as described in any one of the above items.

[0021] In summary, due to the adoption of the above-mentioned solution, the present application can realize the adjustment of three degrees of freedom, namely up and down, front and back, and roll, through electric control within the narrow forklift armrest installation space, and the adjustment of the three degrees of freedom will not interfere with each other, and the adjustment structure is reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a structural diagram of the seat and armrest mechanism of this application;

[0023] Figure 2 Schematic diagram of the structure of the handrail mechanism;

[0024] Figure 3 for Figure 2 Structural diagram from another angle;

[0025] Figure 4 for Figure 2 A schematic diagram of the structure from another angle (the first slider is not shown);

[0026] Figure 5 This is a structural diagram of the seat and armrest mechanism from another angle;

[0027] Figure 6 、 Figure 7 This is a diagram showing the lifting and lowering adjustment of the seat armrest;

[0028] Figure 8 、 Figure 9 This is a diagram of the lateral adjustment of the seat armrest;

[0029] Figure 10 、 Figure 11 Schematic diagram of the front and rear adjustment of the seat armrest.

[0030] Reference numerals:

[0031] Up and down translation mechanism 1, first slide rail 11, first limiter 111, first slider 12, first driving mechanism 13, screw 131, screw seat 132, lifting mounting plate 133, armrest mounting seat 14, first mounting seat 15, armrest mounting portion 151, horizontal connecting portion 152,

[0032] Front-back translation mechanism 2, second slide rail 21, second slider 22, second driving mechanism 23,

[0033] The yaw mechanism 3, the telescopic drive mechanism 31, the telescopic end 311, the fixed end 312,

[0034] Transition support 4, first connection part 41, second connection part 42, first hinge point 43, second hinge point 44,

[0035] Electric switch 5,

[0036] Forklift control module 6,

[0037] Armrests 7. DETAILED DESCRIPTION

[0038] The embodiments of the present invention are described in detail below.

[0039] Example 1:

[0040] This embodiment discloses a chair armrest, comprising: a vertical translation mechanism 1, which drives the armrest 7 for vertical adjustment; a fore-aft translation mechanism 2, which drives the armrest 7 for fore-aft translation adjustment; and a yaw mechanism 3, which drives the armrest 7 for vertical rotation adjustment about a rotation center. The vertical translation mechanism 1, the fore-aft translation mechanism 2, and the yaw mechanism 3 are electrically controlled drive mechanisms, using a motor to provide driving force. Thus, electronic control enables precise adjustment of the three degrees of freedom (up / down, fore / aft, and yaw), significantly improving operational flexibility and comfort.

[0041] like Figure 1-5 As shown, the up-and-down translation mechanism 1 of this embodiment includes a longitudinally arranged first sliding assembly, which includes a longitudinally arranged first slide rail 11 and a first slider 12 slidably arranged on the first slide rail 11. The armrest 7 is connected to the first sliding assembly via a transition support 4. The first driving mechanism 13 drives the first slider 12 to move relative to the first slide rail 11, thereby driving the armrest 7 to move up and down. The first driving mechanism 13 is an electrically controlled driving mechanism, which is powered by a driving motor to drive the first slider 12 to slide along the first slide rail 11. One of the sliders is fixed at a height relative to the seat, and the other is fixed at a height relative to the armrest 7. Therefore, the relative movement of the first slider 12 and the first slide rail 11 can drive the armrest 7 to move up and down relative to the seat, thereby achieving the up-and-down adjustment of the armrest 7.

[0042] like Figure 2As shown, the chair armrest in this embodiment includes an armrest mounting seat 14, one end of which is fixed to the chair seat, and the other end of which is folded upward. The vertical translation mechanism 1 is mounted on the folded portion of the armrest mounting seat 14, and the vertical translation mechanism 1 serves as a support rod for the armrest 7. The first slider 12 is mounted via a first mounting seat 15. The first mounting seat 15 includes an armrest mounting portion 151 and a transverse connecting portion 152. The armrest mounting portion 151 is fixed to the folded portion of the armrest mounting seat 14, and the first slider 12 is fixed to the armrest mounting portion 151; the transverse connecting portion 152 is located below the first slide rail 11, and the first drive mechanism 13 is mounted on the transverse connecting portion 152. In a preferred embodiment, the ends of the transverse connecting portion 152 are bent to form a U-shape as a whole, thereby increasing the overall strength of the transverse connecting portion 152. A first stopper 111 is provided at the bottom of the first slide rail 11. This first stopper 111 provides position limiting for the first slider 12 in a first sliding direction. The first slide rail 11 cooperates with the transverse connecting portion 152 to provide position limiting for the first slider 12 in a second sliding direction, with the first and second sliding directions being opposite. This provides position limiting for the relative movement of the first slider 12 and the first slide rail 11 in two directions. The first drive mechanism 13 in this embodiment includes a drive motor, a worm gear reduction gearbox, and a screw 131. The screw 131 drives the lifting mounting plate 133 to slide along the first slide rail 11. The drive motor and the worm gear are installed at the lower end of the transverse connection part 152; the power output by the drive motor is output to the screw rod 131 after being reversed by the worm gear reduction box. The screw rod 131 in the first drive mechanism 13 is connected to the first slide rail 11. The screw rod 131 is arranged along the moving direction of the first slider 12 and the first slide rail 11, and the screw rod 131 and the first slider 12 are respectively located on opposite sides of the first slide rail 11.

[0043] like Figure 2 As shown, in this embodiment, one end of the screw rod 131 is fixed to the first slide rail 11 through a screw rod seat 132, and the screw rod seat 132 and the first slide rail 11 are fixed by a lifting mounting plate 133, so that the screw rod 131 can drive the first slide rail 11 to move relative to the first slider 12. The screw rod transmission makes the up and down translation mechanism 1 more stable during movement, which is in line with the application scenario of the forklift seat armrest, and the worm gear structure has a good self-locking function, which can provide reliable support for the armrest 7. Preferably, a slide groove is provided on the first slide rail 11, and a roller is provided on the first slider 12. The first slider 12 and the first slide rail 11 are slidably connected by at least two rollers and the slide groove, and the at least two rollers are guided by the slide groove, so that the lifting and lowering adjustment process of the first slider 12 and the first slide rail 11 is more stable, thereby improving the reliability of the structure.

[0044] Combine Figure 5As shown, the front-to-back translation mechanism 2 includes a second sliding assembly arranged transversely, and the second sliding assembly includes a second slide rail 21 arranged transversely, and a second slider 22 slidably arranged on the second slide rail 21. The front-to-back translation mechanism 2 is arranged between the transition support 4 and the armrest 7. The second driving mechanism 23 drives the second slider 22 and the second slide rail 21 to move relative to each other, driving the armrest 7 to adjust forward and backward. In this embodiment, the arrangement of the second slider 22 and the second slide rail 21 is the same as the arrangement of the first slider 12 and the first slide rail 11, with the difference that the second slide rail 21 is arranged along the front-to-back direction of the armrest 7. The second driving mechanism 23 can adopt a screw drive like the first driving mechanism 13. In this solution, the second driving mechanism 23 includes a driving motor, a worm gear reduction box and a screw. The screw drives the slider to slide along the second slide rail 21.

[0045] The second sliding assembly includes a second mounting seat and a second limiting member arranged on both sides of the sliding direction of the second slider 22. The second mounting seat and the second limiting member respectively provide sliding limits for the second slider 22; the second drive mechanism 23 is mounted on the second mounting seat. Referring to the installation method of the first drive mechanism 13, similarly, the drive motor and the worm gear reducer in the second drive mechanism 23 are mounted on the second mounting seat, facing away from the second slide rail 21; the screw rod is driven by the motor to drive the second slider 22 to move along the second slide rail 21. In this embodiment, the second slide rail 21 is set at the bottom of the armrest 7, and the second slider 22 is mounted on the transition support 4, so that the armrest 7 can be adjusted forward and backward through the relative movement of the second slider 22 and the second slide rail 21.

[0046] Combine Figure 5 As shown, the transition support 4 of this embodiment includes a first connecting part 41 and a second connecting part 42. The first connecting part 41 is connected to the up and down translation mechanism 1, and the second connecting part 42 is connected to the front and back translation mechanism 2. One end of the first connecting part 41 is hinged to the second connecting part 42, and the hinge serves as a first hinge point 43.

[0047] The yaw mechanism 3 is mounted on the transition support 4 and includes a telescopic drive mechanism 31. This telescopic drive mechanism 31 is an electrically controlled mechanism and includes a telescopic end 311 capable of telescopic movement. A fixed end 312 of the telescopic drive mechanism 31 is hingedly connected to a first connection portion 41 of the transition support 4. The telescopic end 311 of the telescopic drive mechanism 31 is hingedly connected to a second connection portion 42 of the transition support 4, serving as a second hinge point 44. When the telescopic end 311 of the telescopic drive mechanism 31 is actuated, the second connection portion 42 of the transition support 4 rotates about the first hinge point 43, driving the armrest 7 to rotate vertically. Thus, the vertical translation mechanism 1, the fore-aft translation mechanism 2, and the yaw mechanism 3 are connected via the transition support 4, and a simple structure prevents interference between the three degrees of freedom.

[0048] In this embodiment, the first connecting portion 41, the second connecting portion 42, and the telescopic drive mechanism 31 form a triangular support. This arrangement allows the telescopic drive mechanism 31 to extend and retract, driving the second connecting portion 42 to rotate and adjust the connected fore-and-aft translation mechanism 2 and the armrest 7 about the first rotation center, thereby achieving lateral adjustment of the armrest 7. Furthermore, the telescopic drive mechanism 31 has a self-locking structure, which, combined with the triangular structure, provides reliable support for the armrest 7.

[0049] In a specific embodiment, Figure 5 As shown, the first connecting portion 41 is fixed to the first slide rail 11. The first connecting portion 41 is tilted to create a fore-aft positional offset between the first hinge point 43 and the second hinge point 44. This allows the telescopic end 311 to extend and retract, driving the second connecting portion 42 to rotate about the first hinge end. The second connecting portion 42 is positioned along the fore-aft direction of the armrest 7, and the telescopic drive mechanism 31 is arranged generally longitudinally. This creates a triangular, stable support structure between the first connecting portion 41, the second connecting portion 42, and the telescopic mechanism 31. In one embodiment, the lateral swing range of the armrest 7 is defined by the telescopic distance of the telescopic end 311 of the telescopic drive mechanism 31.

[0050] In this embodiment, the telescopic drive mechanism 31 is an electric push rod that extends and retracts longitudinally. This type of push rod is readily available and is currently available. It typically consists of a motor, transmission gears, and a push rod. The motor's power is transmitted to the push rod via the transmission gears, driving its extension and retraction. With the appropriate motor and gear set, self-locking functionality is achieved. The push rod occupies a small space, and the transition support 4 and push rod can be positioned integrally at the lower end of the armrest 7, resulting in a compact structure.

[0051] The forklift control module 6 is located in front of the armrest 7 and includes multiple control switches for controlling the forklift's movements, including multiple switches for controlling the forklift or forks' forward and backward movement, lifting and lowering, and emergency stop. This eliminates the need for an additional control console, further reducing cab space. The driver can operate the forklift control module 6 by simply resting their hands on the armrest 7, making operation more convenient.

[0052] The armrest 7 is provided with electric control switches 5 corresponding to the up and down translation mechanism 1, the front and back translation mechanism 2 and the lateral movement mechanism 3. Specifically, the first drive mechanism 13, the second drive mechanism 23 and the telescopic drive mechanism 31 are connected to the controller of the forklift, and the above-mentioned electric control switches 5 are connected to the controller to realize the electric control of the three degrees of freedom movement of the armrest 7. These electric control switches 5 can be centrally arranged at the front of the armrest 7 together with the forklift control module 6. In other preferred embodiments, the electric control switch 5 for controlling the adjustment of the armrest 7 according to the above-mentioned three degrees of freedom is arranged on the side of the armrest 7, separately from the forklift control module 6, to prevent accidental touch after the adjustment is completed. The electric control switch 5 adopts a self-reset button, and the rocker of the button is provided with different protrusions at the front and back to facilitate blind operation by the operator.

[0053] like Figure 6 and Figure 7 As shown, when the armrest 7 needs to be raised or lowered, the front-rear translation mechanism 2 and the lateral movement mechanism 3 maintain their current positions, the first driving mechanism 13 is actuated, and the screw rod 131 drives the first sliding assembly to actuate, thereby achieving the up and down raising and lowering adjustment of the armrest 7.

[0054] like Figure 8 and Figure 9 As shown, when the armrest 7 needs to be rotated and adjusted, the up and down translation mechanism 1 and the front and rear translation mechanism 2 maintain their current positions, the telescopic drive mechanism 31 is activated, and its telescopic end 311 telescopes and drives the armrest 7 to rotate with the first hinge point 43 as the rotation center for lateral adjustment.

[0055] like Figure 10 and Figure 11 As shown, when the armrest 7 needs to be adjusted forward and backward, the up and down translation mechanism 1 and the sway mechanism 3 maintain their current positions, the second drive mechanism 23 is actuated, and the screw drives the second sliding assembly to actuate, thereby achieving forward and backward movement adjustment of the armrest 7.

[0056] The seat armrest of the above structure can realize precise adjustment of the three degrees of freedom of up and down, front and back, and lateral swing through electric control, which significantly improves the operational flexibility and comfort. The triangular support structure and articulated design of the transition support enhance the overall stability, avoid the armrest from sinking or loosening during adjustment, and meet the needs of high-intensity operations. According to the above settings, the up and down translation mechanism can be directly used as the longitudinal support rod of the armrest, and the front and back translation mechanism can be directly set in the armrest box of the armrest. The up and down translation mechanism, the front and back translation mechanism, and the lateral swing mechanism are connected by the transition support. The structure is compact and occupies little space, which meets the requirements of small installation space for forklift armrests; and the adjustment of the three degrees of freedom will not interfere with each other, and the adjustment structure is reliable.

[0057] Example 2:

[0058] This embodiment discloses a transport vehicle, wherein the driver's cab is provided with a seat armrest as shown in the first embodiment.

[0059] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the claims and their equivalents.

Claims

1. A chair armrest, characterized in that: include: The up-and-down translation mechanism includes a first sliding assembly arranged longitudinally, the first sliding assembly including a first guide rail arranged longitudinally, and a first slider slidably arranged on the first guide rail. The armrest is connected to the first sliding assembly via a transition support. The first driving mechanism drives the first slider to move relative to the first guide rail, thereby driving the armrest to adjust up and down. The front-to-back translation mechanism includes a second sliding assembly arranged transversely, the second sliding assembly includes a second guide rail arranged transversely, and a second slider slidably arranged on the second guide rail. The front-to-back translation mechanism is arranged between the transition support and the armrest, and the second driving mechanism drives the second slider to move relative to the second guide rail, thereby driving the armrest to adjust forward and backward; The transition support includes a first connecting portion and a second connecting portion, wherein the first connecting portion is connected to the up-and-down translation mechanism, and the second connecting portion is connected to the front-and-back translation mechanism, and one end of the first connecting portion is hinged to the second connecting portion to form a first hinge point; The lateral swing mechanism includes a telescopic drive mechanism, the fixed end of the telescopic drive mechanism is hinged to the first connecting part of the transition support, and the telescopic end of the telescopic drive mechanism is hinged to the second connecting part of the transition support. The first connecting part, the second connecting part and the telescopic drive mechanism form a triangular support; when the telescopic end of the telescopic drive mechanism is in motion, the second connecting part of the transition support rotates with the first hinge point as the rotation center, driving the armrest to rotate up and down.

2. A chair armrest according to claim 1, characterized in that: The first driving mechanism, the second driving mechanism and the telescopic driving mechanism are respectively provided with a self-locking structure for locking their adjusted positions.

3. The chair armrest according to claim 2, characterized in that: The first driving mechanism includes a driving motor, a worm gear reduction box and a screw, which drives the lifting mounting plate to slide along the first slide rail through the screw; and / or the second driving mechanism includes a driving motor, a worm gear reduction box and a screw, which drives the slider to slide along the second slide rail through the screw.

4. A chair armrest according to claim 1 or 3, characterized in that: It comprises an armrest mounting seat, one end of which is fixed on the chair seat, and the other end of which is folded upwards. The up-and-down translation mechanism is installed on the folded portion of the armrest mounting seat, and the up-and-down translation mechanism serves as a support rod of the armrest.

5. The chair armrest according to claim 4, characterized in that: The first slider is installed through the first mounting seat, which includes an armrest mounting portion and a transverse connecting portion. The armrest mounting portion is fixed to the folding portion of the armrest mounting seat, and the first slider is fixed to the armrest mounting portion; the transverse connecting portion is located below the first slide rail, and the first driving mechanism is installed on the transverse connecting portion.

6. The chair armrest according to claim 5, characterized in that: A first limiting member is provided at the lower portion of the first slide rail, which provides a limit for the first slider in a first sliding direction; the first slide rail cooperates with the transverse connecting portion to provide a limit for the first slider in a second sliding direction, and the first sliding direction and the second sliding direction are opposite directions.

7. A chair armrest according to claim 1 or 3, characterized in that: The second sliding assembly includes a second mounting seat and a second limiting member provided on both sides of the second slider in the sliding direction, the second mounting seat and the second limiting member respectively providing sliding limits for the second slider; The second driving mechanism is mounted on a second mounting seat.

8. The chair armrest according to claim 1, characterized in that: The telescopic driving mechanism is an electric push rod, and the electric push rod is telescopic in the longitudinal direction.

9. The chair armrest according to claim 1, characterized in that: The armrest is provided with electric control switches corresponding to the up and down translation mechanism, the front and back translation mechanism and the lateral movement mechanism.

10. A transport vehicle, characterized in that: The utility model comprises the chair armrest according to any one of claims 1 to 9.

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