Fork lift control system

Abstract

The utility model relates to the technical field of fork truck, disclose a kind of fork lifting control system, install on fork truck, the fork truck includes liftable fork, the fork lifting control system includes: lifting cylinder, solenoid valve, operating lever, first switch and second switch, lifting cylinder is connected with fork, solenoid valve is connected with lifting cylinder, for the hydraulic passage of control lifting cylinder to drive fork lifting, the operating lever has liftable movable end, first switch and second switch are respectively arranged on solenoid valve, and with the abutment of different position of movable end;When movable end rises to first preset position, first switch can be triggered to act, make solenoid valve energization and control fork rise;When movable end drops to second preset position, second switch can be triggered to act, make solenoid valve energization and control fork drop.The utility model is characterized in that, the active control of fork rise, drop process can be realized, and structure is simple, stability is high, safe and reliable.

Description

Technical Field

[0001] This utility model relates to the field of forklift technology, and in particular to a fork lifting control system. Background Technology

[0002] In the field of forklift technology, fork lifting control is one of the key functions for achieving cargo handling and stacking operations. Traditional systems typically use hydraulic drive, using a lever to link mechanical or electrical components to control solenoid valves, thereby driving the forks to rise. For lowering control, some systems rely on the weight of the forks and load to cause hydraulic oil to flow back and lower the forks. However, this method lacks speed regulation and is prone to excessively rapid descent due to gravity, affecting operational safety and stability. Especially when operating on slopes or under heavy loads, there is a risk of uncontrolled sliding, reducing overall operational safety and reliability. Utility Model Content

[0003] In view of the above-mentioned shortcomings of the existing technology, the technical problem to be solved by this utility model is to propose a fork lifting control system that can realize active control of the fork lifting and lowering process, and is simple in structure, highly stable, safe and reliable.

[0004] The technical solution adopted by this utility model to solve its technical problem is to provide a forklift lifting control system, which is installed on a forklift. The forklift includes liftable forks. The forklift lifting control system includes: a lifting cylinder, a solenoid valve, an operating lever, a first switch, and a second switch. The lifting cylinder is connected to the forks, and the solenoid valve is connected to the lifting cylinder to control the hydraulic passage of the lifting cylinder to drive the forks to lift. The operating lever has a liftable movable end. The first switch and the second switch are respectively disposed on the solenoid valve and abut against different positions of the movable end. When the movable end rises to a first preset position, it can trigger the first switch to activate the solenoid valve and control the forks to rise. When the movable end falls to a second preset position, it can trigger the second switch to activate the solenoid valve and control the forks to fall.

[0005] In the aforementioned forklift lifting control system, the movable end is provided with a first positioning part and a second positioning part arranged vertically and connected in sequence. There is a diameter difference between the first positioning part and the second positioning part, and the axial length of the first positioning part and the second positioning part is greater than the lifting stroke of the movable end. The first switch abuts against the first positioning part, and the second switch abuts against the second positioning part. When the movable end rises to the first preset position, the first switch and the second switch abut against the second positioning part respectively. When the movable end falls to the second preset position, the first switch and the second switch abut against the first positioning part respectively.

[0006] In the forklift control system described above, the diameter of the first positioning part is smaller than the diameter of the second positioning part, and the first positioning part and the second positioning part are connected by a transition part, the diameter of which gradually decreases from top to bottom.

[0007] In the aforementioned forklift control system, the first switch includes a first switch body and a first pressure rod. The first switch body is vertically arranged, one end of the first pressure rod is connected to the first switch body, and the other end abuts against the first positioning part. There is a movement gap between the end of the first pressure rod that abuts against the first positioning part and the first switch body. When the movable end rises, the end of the first pressure rod that abuts against the first positioning part slides along the outer wall of the first positioning part to the outer wall of the second positioning part, and moves towards the first switch body, thereby energizing the solenoid valve and controlling the forklift to rise.

[0008] In the aforementioned forklift lifting control system, a first roller is rotatably provided at one end of the first pressure rod that abuts against the first positioning part, and the first pressure rod abuts against the first positioning part through the first roller.

[0009] In the aforementioned forklift control system, the second switch includes a second switch body and a second pressure rod. The second switch body is vertically arranged, one end of the second pressure rod is connected to the second switch body, and the other end abuts against the second positioning part. There is a movement gap between the end of the second pressure rod that abuts against the second positioning part and the second switch body. When the movable end descends, the end of the second pressure rod that abuts against the second positioning part slides along the outer wall of the second positioning part toward the outer wall of the first positioning part and translates away from the second switch body, thereby energizing the solenoid valve and controlling the fork to descend.

[0010] In the aforementioned forklift lifting control system, a second roller is rotatably provided at one end of the second pressure rod that abuts against the second positioning part, and the second pressure rod abuts against the second positioning part through the second roller.

[0011] In the aforementioned forklift control system, there is a 90° angle between the first switch and the second opening.

[0012] In the aforementioned forklift lifting control system, a mounting plate assembly is included. The mounting plate assembly includes a first mounting plate and a second mounting plate. One side of the first mounting plate is detachably connected to the outer wall of the solenoid valve, and the other side extends vertically away from the solenoid valve, with its extension section parallel to the side wall of the first switch. One side of the second mounting plate is detachably connected to the first mounting plate, and the other side extends toward the second switch, with its extension section parallel to the side wall of the second switch. The first switch is detachably mounted on the first mounting plate, and the second switch is detachably mounted on the second mounting plate.

[0013] In the aforementioned forklift lifting control system, the forklift also includes a seat, and a third switch is provided below the seat, with the second switch electrically connected to the third switch.

[0014] Compared with the prior art, the present invention has at least the following beneficial effects:

[0015] 1. In this utility model, a first switch and a second switch are used to control the raising and lowering of the forks, respectively. The corresponding switches are triggered at different positions by the movable end of the operating lever, thereby achieving precise control of the solenoid valve's energization state. Compared to the traditional method of relying on gravity for lowering, this design achieves active control of the fork lowering process, effectively improving operational safety and stability.

[0016] 2. In this utility model, the movable end of the operating lever is provided with a first positioning part and a second positioning part arranged vertically and connected in sequence. The diameters of the first positioning part and the second positioning part are different, and the axial length of the first positioning part and the second positioning part is greater than the lifting stroke of the movable end. The first switch abuts against the first positioning part, and the second switch abuts against the second positioning part. When the movable end rises to a first preset position, the first switch and the second switch abut against the second positioning part respectively, at which time only the first switch is triggered. When the movable end falls to a second preset position, the first switch and the second switch abut against the first positioning part respectively, at which time only the second switch is triggered. This design ensures that when performing an action in any direction, the control switch in the other direction remains in a non-triggered state, thereby realizing the interlocking function between directional controls, effectively preventing accidental triggering and system abnormalities caused by the simultaneous action of two switches, and significantly improving the safety of operation and the reliability of control.

[0017] 3. In this utility model, the diameter of the first positioning part is smaller than that of the second positioning part, and the first positioning part and the second positioning part are connected by a transition part, the diameter of which gradually decreases from top to bottom. This design ensures that the first switch and the second switch can achieve a smooth transition when switching and contacting different positioning parts, reducing mechanical impact and trigger jamming, and improving the smoothness of the switch triggering process and the stability of the system response. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the forklift lifting control system of this utility model installed on a forklift.

[0019] Figure 2 This is a partial structural schematic diagram of the fork lifting control system of this utility model.

[0020] Figure 3 This is a partial exploded view of the fork lifting control system of this utility model.

[0021] Figure 4 for Figure 3 Another perspective on the structure

[0022] In all the accompanying drawings, the same reference numerals denote the same technical features, specifically:

[0023] 100. Forklift; 110. Forks; 120. Seat; 130. Frame; 200. Lifting cylinder; 300. Solenoid valve; 400. Operating lever; 410. Moving end; 411. First positioning part; 412. Second positioning part; 413. Transition part; 420. Handle end; 500. First switch; 510. First switch body; 520. First pressure rod; 530. First roller; 600. Second switch; 610. Second switch body; 620. Second pressure rod; 630. Second roller; 700. Mounting plate assembly; 710. First mounting plate; 720. Second mounting plate. Detailed Implementation

[0024] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0025] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0026] Furthermore, in this utility model, the use of terms such as "first," "second," and "a" is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0027] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0028] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0029] like Figures 1 to 4 As shown, in this embodiment, a forklift 110 lifting control system is installed on a forklift 100, which includes liftable forks 110. The forklift 110 lifting control system includes: a lifting cylinder 200, a solenoid valve 300, an operating lever 400, a first switch 500, and a second switch 600. The lifting cylinder 200 is connected to the forks 110 and is used to drive the forks 110 to rise or fall; the solenoid valve 300 is connected to the lifting cylinder 200 and is used to control the hydraulic passage of the lifting cylinder 200 to drive the forks 110 to rise or fall; the operating lever 400 has a liftable movable end 410; the first switch 500 and the second switch 600 are respectively disposed on the solenoid valve 300 and abut against different positions of the movable end 410. When the movable end 410 rises to the first preset position, it triggers the first switch 500, energizing the solenoid valve 300 and controlling the forks 110 to rise. When the movable end 410 descends to the second preset position, it triggers the second switch 600, energizing the solenoid valve 300 and controlling the forks 110 to descend. Compared to the traditional method of relying on the weight of the forks 110 for descent, this design achieves active control of the forks 110 descent process, effectively improving operational safety and stability, especially in slope operations or under heavy loads, avoiding the risk of uncontrolled sliding due to gravity.

[0030] Specifically, such as Figures 1 to 4 As shown, in this embodiment, the forklift 100 includes a frame 130, forks 110, and a seat 120. The forks 110 are vertically mounted at the front end of the frame 130 for carrying goods; the seat 120 is located in the middle of the frame 130 for the operator to sit on and operate the forklift 100.

[0031] In this embodiment, the lifting control system includes a lifting cylinder 200, a solenoid valve 300, an operating lever 400, a first switch 500, and a second switch 600, all mounted on the frame 130. The lifting cylinder 200 is located at the front end of the frame 130 and connected to the forks 110, driving the forks 110 to rise and fall. The operating lever 400 is located beside the seat 120, allowing the operator to manually push or pull it to control the lifting operation of the forks 110. The solenoid valve 300 is located below the operating lever 400 and serves as a key control element in the hydraulic system, switching the hydraulic path to drive the lifting cylinder 200. The first switch 500 and the second switch 600 are respectively located between the solenoid valve 300 and the operating lever 400, triggering corresponding control signals based on changes in the position of the movable end 410 of the operating lever 400. When the operating lever 400 is pushed or pulled to the preset position, the corresponding first switch 500 or second switch 600 is triggered, thereby controlling the solenoid valve 300 to be energized and driving the forks 110 to perform raising or lowering actions.

[0032] In this embodiment, multiple control levers 400 are arranged in a straight line, each used to control different functions of the forks 110. For example, one control lever 400 controls the lifting and lowering of the forks 110, another control lever 400 controls the tilting function of the mast, and there is also a control lever 400 or handle for controlling the vehicle's steering. By arranging the multiple control levers 400 in a linear fashion, it is not only easier for the operator to distinguish and operate each function, but it also facilitates the integrated design of the vehicle control system, improving the convenience of human-machine interaction and operational efficiency.

[0033] In this embodiment, the operating lever 400 near the seat 120 is used to control the lifting function of the forks 110. The operating lever 400 is vertically arranged, with a handle end 420 at its top for the operator to grip and push / pull; and a movable end 410 at its bottom, which cooperates with the first switch 500 and the second switch 600 in the control system. When the operator pushes or pulls the handle end 420, it causes the movable end 410 of the operating lever 400 to move vertically up and down, thereby triggering the corresponding first switch 500 or second switch 600 to control the lifting or lowering of the forks 110.

[0034] In this embodiment, when the movable end 410 of the operating lever 400 reaches a first preset position during the upward stroke, it triggers the first switch 500 to energize the solenoid valve 300 and drive the forks 110 to rise. During the downward stroke, when the movable end 410 reaches a second preset position, it triggers the second switch 600 to energize the solenoid valve 300 and drive the forks 110 to descend. The first preset position refers to the critical position where the movable end 410 of the operating lever 400 can trigger the first switch 500 during the upward stroke; the second preset position refers to the critical position where the movable end 410 of the operating lever 400 can trigger the second switch 600 during the downward stroke.

[0035] In this embodiment, the movable end 410 is provided with a first positioning part 411 and a second positioning part 412 arranged vertically and connected in sequence. There is a diameter difference between the first positioning part 411 and the second positioning part 412, which is used to selectively trigger the control switches in different directions. Simultaneously, the lengths of the first positioning part 411 and the second positioning part 412 are greater than the travel distance of the movable end 410. This design not only ensures that the first switch 500 and the second switch 600 maintain effective contact with their respective positioning parts throughout their entire range of motion, but also guarantees asynchronous operation between the two switches, avoiding system malfunctions caused by accidental touches or linkage.

[0036] Specifically, the first switch 500 abuts against the first positioning part 411, and the second switch 600 abuts against the second positioning part 412. When the movable end 410 of the operating lever 400 rises to the first preset position, the first switch 500 and the second switch 600 abut against the second positioning part 412 respectively. At this time, only the first switch 500 is triggered, energizing the solenoid valve 300 and driving the forks 110 to rise. When the movable end 410 falls to the second preset position, the first switch 500 and the second switch 600 abut against the first positioning part 411 respectively. At this time, only the second switch 600 is triggered, energizing the solenoid valve 300 and driving the forks 110 to fall. This design ensures that when performing an action in one direction, the control switch in the other direction remains in a non-triggered state, thereby realizing the interlock function between directional controls, effectively preventing accidental triggering and system abnormalities caused by the simultaneous action of two switches, and significantly improving the safety of operation and the reliability of control.

[0037] In this embodiment, both the first positioning part 411 and the second positioning part 412 are cylindrical. The diameter of the first positioning part 411 is smaller than the diameter of the second positioning part 412. Preferably, the first positioning part 411 and the second positioning part 412 are connected by a transition part 413, the diameter of which gradually decreases from top to bottom. This design ensures a smooth transition between the first switch 500 and the second switch 600 during switching and contact with different positioning parts, reducing mechanical shock and trigger jamming, and improving the smoothness of the switch triggering process and the stability of the system response.

[0038] In this embodiment, the first switch 500 and the second switch 600 are arranged vertically and have a 90° angle with each other. This design not only optimizes the spatial structure and improves the convenience of disassembly and assembly, but also helps to avoid mechanical interference and electrical interference between the two switches.

[0039] In this embodiment, the first switch 500 and the second switch 600 are fixedly mounted on the solenoid valve 300 via a mounting plate assembly 700. The mounting plate assembly 700 includes a first mounting plate 710 and a second mounting plate 720 with an L-shaped structure, which are used to achieve stable support for the two switches and optimize the spatial layout.

[0040] In this embodiment, one side of the first mounting plate 710 is detachably connected to the top outer wall of the solenoid valve 300 via fasteners such as screws, and the other side extends vertically away from the solenoid valve 300, with its extension parallel to the side wall of the first switch 500. One side of the second mounting plate 720 is detachably connected to the first mounting plate 710, and the other side extends towards the second switch 600, with its extension parallel to the side wall of the second switch 600. Furthermore, the first switch 500 is detachably mounted on the first mounting plate 710 via clips, screws, or other means, and the second switch 600 is similarly detachably mounted on the second mounting plate 720. This modular, detachable mounting structure not only facilitates assembly and debugging but also benefits later maintenance and replacement, significantly improving the system's engineering applicability and ease of use.

[0041] In this embodiment, the first switch 500 includes a first switch body 510 and a first pressure rod 520. The first switch body 510 is vertically arranged and detachably fixed to the extension end of the first mounting plate 710 by screws or other fasteners, facilitating assembly, debugging, and subsequent maintenance. One end of the first pressure rod 520 is connected to the first switch body 510, and the other end abuts against the first positioning part 411 on the movable end 410. Furthermore, a movement gap is provided between the end of the first pressure rod 520 that contacts the first positioning part 411 and the first switch body 510 to allow the first pressure rod 520 to generate a certain displacement space during triggering. When the operator pushes the operating lever 400 to raise the movable end 410, the end of the first pressure lever 520 that contacts the first positioning part 411 will slide along its outer wall and gradually transition to the outer wall of the larger diameter second positioning part 412. Simultaneously, it will translate towards the first switch body 510, thereby compressing the movement gap and triggering the first switch 500 to energize the solenoid valve 300, driving the forks 110 to rise. This design enables the first switch 500 to achieve automatic trigger control during the movement of the operating lever 400, providing sensitive response and reliable operation, thus improving the system's control accuracy and operational stability.

[0042] In this embodiment, a first roller 530 is rotatably provided at the end of the first pressure rod 520 that abuts against the first positioning part 411, and the first pressure rod 520 abuts against the first positioning part 411 through the first roller 530. This design effectively reduces the frictional resistance generated between the first pressure rod 520 and the first positioning part 411 due to relative sliding during the lifting and lowering process of the movable end 410 of the operating lever 400, thereby improving the smoothness of contact and the speed of motion response between the two.

[0043] In this embodiment, the second switch 600 includes a second switch body 610 and a second pressure rod 620. The second switch body 610 is vertically arranged and detachably fixed to the extension end of the second mounting plate 720 by fasteners for easy installation and replacement. One end of the second pressure rod 620 is connected to the second switch body 610, and the other end abuts against the second positioning part 412 on the movable end 410. Furthermore, a movement gap is provided between the end of the second pressure rod 620 that contacts the second positioning part 412 and the second switch body 610 to allow the second pressure rod 620 to generate a certain displacement space during triggering. When the operator pushes the operating lever 400 to lower the movable end 410, the end of the second pressure lever 620 that contacts the second positioning part 412 will slide along its outer wall and gradually transition to the outer wall of the smaller diameter first positioning part 411. Simultaneously, it will translate away from the second switch body 610, thereby expanding the movement gap and triggering the second switch 600 to energize the solenoid valve 300, driving the forks 110 to descend. This design enables the second switch 600 to achieve automatic trigger control during the movement of the operating lever 400, providing sensitive response and reliable operation, thus improving the system's control accuracy and operational stability.

[0044] In this embodiment, a second roller 630 is rotatably provided at the end of the second pressure rod 620 that abuts against the second positioning part 412, and the second pressure rod 620 abuts against the second positioning part 412 through the second roller 630. This design effectively reduces the frictional resistance generated between the second pressure rod 620 and the second positioning part 412 due to relative sliding during the lifting and lowering process of the movable end 410 of the operating lever 400, thereby improving the smoothness of contact and the speed of motion response between the two.

[0045] Preferably, in this embodiment, both the first switch 500 and the second switch 600 are micro switches. Micro switches have advantages such as fast response speed, reliable operation, and long lifespan, and are suitable for control scenarios with frequent triggering, effectively meeting the requirements of the forklift 110 lifting control system for switch sensitivity and stability.

[0046] It is worth noting that the control principle between the micro switch and the solenoid valve 300 is existing technology in this field and will not be elaborated here.

[0047] In this embodiment, a third switch (not shown in the figure) is provided under the seat 120 of the forklift 100, which serves as a safety detection switch for system start / stop control. The second switch 600 is electrically connected to the third switch, forming a linkage control relationship.

[0048] When the operator is seated on seat 120, the third switch is triggered, energizing the entire fork 110 lifting control system. At this time, the operator can control the raising or lowering of the forks 110 by pushing or pulling the corresponding operating lever 400. When the operator leaves seat 120, the third switch is deactivated, the fork 110 lifting control system is immediately de-energized, the operating lever 400 loses its control function, and thus the forks 110 cannot be raised or lowered, effectively improving the safety protection level of the system.

[0049] Furthermore, when the operator sits back in seat 120 and triggers the third switch to re-energize, the second switch 600, being electrically connected to the third switch, will perform a "return to zero" action during the power outage, i.e., return to its initial non-triggered state. Therefore, in this state, even if the operating lever 400 is still in the position that previously triggered the descent action, the second switch 600 will not respond immediately. The operator must reset the operating lever 400 and pull it again to re-trigger the descent control. This design effectively prevents the forks 110 from descending unexpectedly due to misoperation or the operating lever 400 not being fully reset, significantly improving the system's safety and controllability. It is particularly suitable for industrial vehicle applications in high-risk conditions such as ramp operations and high-altitude handling.

Claims

1. A fork lift control system for installation on a fork lift truck, the fork lift truck including a liftable fork, characterised by, The fork lifting control system includes: a lifting cylinder, a solenoid valve, an operating lever, a first switch, and a second switch. The lifting cylinder is connected to the forks, and the solenoid valve is connected to the lifting cylinder to control the hydraulic passage of the lifting cylinder to drive the forks to lift. The operating lever has a movable end that can be raised and lowered. The first switch and the second switch are respectively located on the solenoid valve and abut against different positions of the movable end. When the movable end rises to a first preset position, it can trigger the first switch to activate the solenoid valve and control the forks to rise. When the movable end falls to a second preset position, it can trigger the second switch to activate the solenoid valve and control the forks to fall.

2. A fork lift control system according to claim 1, wherein, The movable end is provided with a first positioning part and a second positioning part arranged vertically and connected in sequence. There is a diameter difference between the first positioning part and the second positioning part, and the axial length of the first positioning part and the second positioning part is greater than the lifting stroke of the movable end. The first switch abuts against the first positioning part, and the second switch abuts against the second positioning part; when the movable end rises to the first preset position, the first switch and the second switch abut against the second positioning part respectively; when the movable end falls to the second preset position, the first switch and the second switch abut against the first positioning part respectively.

3. A fork lift control system according to claim 2, wherein, The diameter of the first positioning part is smaller than the diameter of the second positioning part, and the first positioning part and the second positioning part are connected by a transition part, the diameter of which gradually decreases from top to bottom.

4. A fork lift control system according to claim 2, wherein, The first switch includes a first switch body and a first pressure rod. The first switch body is arranged vertically. One end of the first pressure rod is connected to the first switch body, and the other end abuts against the first positioning part. There is a movement gap between the end of the first pressure rod that abuts against the first positioning part and the first switch body. When the movable end rises, the end of the first pressure rod that abuts against the first positioning part slides along the outer wall of the first positioning part to the outer wall of the second positioning part, and moves towards the first switch body, so that the solenoid valve is energized and controls the forks to rise.

5. A fork lift control system according to claim 4, wherein, The first pressure rod has a first roller rotatably mounted at one end that abuts against the first positioning part, and the first pressure rod abuts against the first positioning part through the first roller.

6. A fork lift control system according to claim 2, wherein, The second switch includes a second switch body and a second pressure rod. The second switch body is arranged vertically. One end of the second pressure rod is connected to the second switch body, and the other end abuts against the second positioning part. There is a movement gap between the end of the second pressure rod that abuts against the second positioning part and the second switch body. When the movable end descends, the end of the second pressure rod that abuts against the second positioning part slides along the outer wall of the second positioning part toward the outer wall of the first positioning part and moves away from the second switch body, so that the solenoid valve is energized and controls the fork to descend.

7. A fork lift control system according to claim 6, wherein, The second pressure rod has a second roller rotatably mounted at one end that abuts against the second positioning part, and the second pressure rod abuts against the second positioning part through the second roller.

8. A fork lift control system according to claim 1 wherein, The first switch and the second switch have a 90° angle between them.

9. A fork lift control system according to claim 8, wherein, The system includes a mounting plate assembly comprising a first mounting plate and a second mounting plate. One side of the first mounting plate is detachably connected to the outer wall of the solenoid valve, and the other side extends vertically away from the solenoid valve, with its extension parallel to the side wall of the first switch. One side of the second mounting plate is detachably connected to the first mounting plate, and the other side extends toward the second switch, with its extension parallel to the side wall of the second switch. The first switch is detachably mounted on the first mounting plate, and the second switch is detachably mounted on the second mounting plate.

10. A fork lift control system according to claim 1 wherein, The forklift also includes a seat, and a third switch is located under the seat, with the second switch electrically connected to the third switch.

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