High-position low-failure-rate travel switch

Abstract

The utility model relates to a high-position low-failure-rate travel switch. The technical problem that whether the pothole supporting plate works normally or not cannot be detected in the prior art is solved. Comprising a pit hole protection plate movably arranged on the outer side of a chassis, the pit hole protection plate is in linkage with an eccentric pressing block arranged at one end of the chassis in a circumferential swinging mode, a travel switch capable of abutting against one side of the eccentric pressing block when the eccentric pressing block swings in the circumferential direction is arranged on the upper side of the eccentric pressing block, and the travel switch is connected with an ECU module. The device has the advantages that the travel switch is designed at a high position to detect whether the pit protection mechanism works normally or not, compared with a traditional design at a pit board or a lower position, the high position can effectively prevent water, and the normal work of the travel switch is prevented from being influenced by engineering garbage or garbage such as mud and silt.

Description

Technical Field

[0001] The utility model belongs to the technical field of aerial work equipment, and in particular relates to a high-position low-failure-rate travel switch. Background Art

[0002] In order to avoid obstacles during travel, the existing aerial work platforms are designed to have a larger distance from the lower part of the vehicle body to the ground to avoid some protruding obstacles on the ground, thereby ensuring that the aerial work platform can travel normally. However, due to the large distance from the ground, when encountering potholes during driving, the wheels are likely to enter the potholes, which will cause the vehicle body to tilt. When a small tilt on the ground is transmitted to the high-position work platform, it will become a large shake, which will cause the work platform to overturn.

[0003] In order to solve the deficiencies of the prior art, people have conducted long-term exploration and proposed various solutions. For example, the Chinese patent document discloses a pothole protection mechanism for an aerial work platform [201720293038.1], which includes a fixed block installed on the chassis, a pothole support plate is arranged on the side of the bottom surface of the chassis, the pothole support plate is hingedly fixed on the chassis and hinged with the lower end of the first connecting rod, the upper end of the first connecting rod is hinged with the left side of the second connecting rod through a pin shaft, the pin shaft sleeve is inserted and fixed on the arc hole arranged on the side of the chassis, the center of the second connecting rod is fixed on the side of the chassis and can rotate, the pressure shaft passes through the fixed block and is arranged on the side of the chassis and can move up and down, the first spring is fixedly installed between the upper side of the fixed block and the top cap of the pressure shaft, the upper end of the second spring is connected to the pin shaft, the lower end of the second spring is connected and fixed to the bottom surface of the chassis, the side of the chassis is provided with a connecting block and a second spring, and the bottom cap of the pressure shaft is located below the fixed block and presses the right side of the second connecting rod.

[0004] The above solution has solved the problem that the vehicle body is prone to overturning when encountering potholes on the ground to a certain extent. However, the solution still has many shortcomings, such as the inability to detect whether the pothole support plate is working properly. Summary of the invention

[0005] The utility model aims to provide a high-position low-failure-rate travel switch in view of the above problems.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solutions: a high-position low-failure-rate travel switch, including a pothole protection plate movably arranged on the outside of the chassis, the pothole protection plate is linked with an eccentric pressure block circumferentially swingingly arranged at one end of the chassis, and a travel switch is arranged on the upper side of the eccentric pressure block, which can abut against one side of the eccentric pressure block when the eccentric pressure block swings circumferentially, and the travel switch is connected to the ECU module. When the eccentric pressure block is subjected to the downward pressure of the fork frame, the pothole protection plate can be retracted to the lower side of the chassis; or, when the fork frame rises under the action of the fork frame lifting drive mechanism and separates from the eccentric pressure block, the eccentric pressure block swings circumferentially under the action of its own weight to drive the pothole protection plate to unfold on the outside of the chassis; the operating state of the travel switch is detected by the ECU module, thereby detecting the operating state of the pothole protection plate.

[0007] In the above-mentioned high-position low-failure-rate travel switch, the travel switch is fixed to one end of the chassis by means of mounting bolts and the travel switch is tilted toward the eccentric pressure block. The travel switch is fixed to the chassis by means of mounting bolts, and the position of the travel switch is specifically defined, thereby improving the overall stability.

[0008] In the above-mentioned high-position low-failure-rate travel switch, the ECU module is connected to the fork frame lifting drive mechanism, and the ECU module is used to control the operation of the fork frame lifting drive mechanism.

[0009] In the above-mentioned high-position low-failure-rate travel switch, the travel switch is a self-resetting travel switch, and one end of the travel switch has a detection head, and the detection head is rotatably provided with a detection roller corresponding to the eccentric pressure block. The detection roller contacts the eccentric pressure block to realize the connection or disconnection control, thereby achieving the purpose of control, and the travel switch is a self-resetting travel switch, so that when the pothole protection plate returns to the initial state, the travel switch is reset.

[0010] In the above-mentioned high-position low-failure rate travel switch, the eccentric pressure block has a free end at one end and a connecting end at the other end. The connecting end of the eccentric pressure block is hingedly connected to the upper end of a connecting seat arranged at one end of the pothole protection plate through a connecting rod, and the lower end of the connecting seat is hingedly connected to the chassis.

[0011] In the above-mentioned high-position low-failure-rate travel switch, the eccentric pressure block has two symmetrically arranged pressure block plates, and a pressure block counterweight block is provided between the pressure block plates.

[0012] In the above-mentioned high-position low-failure rate travel switch, a pressure block mounting seat is provided on the chassis, and the end of the eccentric pressure block close to the free end is rotatably arranged between the pressure block mounting seat and the chassis through the mounting shaft. The pressure block mounting seat plays a role in fixing the eccentric pressure block, and the eccentric pressure block also rotates around the pressure block mounting seat.

[0013] In the above-mentioned high-position low-failure-rate travel switch, the pressure block mounting seat is L-shaped and a space for the eccentric pressure block to swing is formed between the pressure block mounting seat and the chassis, and a reinforcement block connected to the chassis is provided at the lower end of the pressure block mounting seat. The reinforcement block supports and fixes the pressure block mounting seat and also stabilizes the eccentric pressure block.

[0014] In the above-mentioned high-position low-failure-rate travel switch, the side of the eccentric pressure block away from the travel switch has a limiting portion corresponding to one side of the lower end of the pressure block mounting seat.

[0015] In the above-mentioned high-position low-failure rate travel switch, the travel switch is a normally open travel switch, and the voltage of the travel switch is 24V in the open state and 0V in the closed state. When the pothole protection plate is opened, the eccentric pressure block touches the travel switch, the switch is disconnected, and the ECU module detects that the voltage is 0V, and this state is the open state of the pothole protection plate; when the pothole protection plate is retracted, the eccentric pressure block does not touch the travel switch, the travel switch automatically resets, and the ECU module detects that the voltage is 24V, and this state is the retracted state of the pothole protection plate.

[0016] Compared with the existing technology, the advantages of the utility model are:

[0017] 1. The device uses a travel switch design to detect whether the pothole protection mechanism is working properly at a high position. Compared with the traditional design on the pothole plate or lower position, the high position can effectively prevent water from leaking and also prevent garbage such as construction waste or mud and sand from affecting the normal operation of the travel switch.

[0018] 2. The device has a simple mechanical structure and a single control principle, which prolongs the service life of the travel switch, greatly reduces the failure rate of the mechanism, and has low maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the utility model.

[0020] Figure 2 It is a structural schematic diagram of the eccentric pressing block in the utility model.

[0021] Figure 3 It is a structural schematic diagram of the travel switch in the utility model.

[0022] Figure 4 It is a system schematic diagram of the ECU module in the utility model.

[0023] Figure 5 It is a structural schematic diagram of the pothole protection plate of the utility model in a folded state.

[0024] Figure 6 It is a structural schematic diagram of the pothole protection plate of the utility model in an open state.

[0025] In the figure: chassis 1, pressure block mounting seat 11, mounting shaft 12, reinforcement block 13, pothole protection plate 2, connecting seat 21, eccentric pressure block 3, free end 31, connecting end 32, connecting rod 33, pressure block plate 34, pressure block counterweight block 35, limit part 36, travel switch 4, detection head 41, detection roller 42, ECU module 5, fork lifting drive mechanism 6. DETAILED DESCRIPTION

[0026] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0027] like Figure 1-6 As shown, a high-position low-failure rate travel switch includes a pothole protection plate 2 movably arranged on the outside of the chassis 1, the pothole protection plate 2 is linked with an eccentric pressure block 3 circumferentially swingingly arranged at one end of the chassis 1, and a travel switch 4 is arranged on the upper side of the eccentric pressure block 3, which can abut against one side of the eccentric pressure block 3 when the eccentric pressure block 3 swings circumferentially, and the travel switch 4 is connected to the ECU module 5. When the eccentric pressure block 3 is subjected to the downward pressure of the fork frame, the pothole protection plate 2 can be retracted to the lower side of the chassis 1; or, when the fork frame rises under the action of the fork frame lifting drive mechanism 6 and is separated from the eccentric pressure block 3, the eccentric pressure block 3 swings circumferentially under the action of its own weight to drive the pothole protection plate 2 to unfold outside the chassis 1; the operating state of the travel switch 4 is detected by the ECU module 5, thereby detecting the operating state of the pothole protection plate 2.

[0028] like Figure 1 As shown, the travel switch 4 is fixed to one end of the chassis 1 by mounting bolts and the travel switch 4 is tilted toward the eccentric pressure block 3. The travel switch 4 is fixed to the chassis 1 by mounting bolts, and the position of the travel switch 4 is specifically defined, thereby improving the overall stability.

[0029] like Figure 4 As shown, the ECU module 5 is connected to the fork lifting drive mechanism 6. The ECU module 5 is used to control the operation of the fork lifting drive mechanism 6.

[0030] like Figure 3 As shown, the travel switch 4 is a self-resetting travel switch, and one end of the travel switch 4 has a detection head 41, and a detection roller 42 corresponding to the eccentric pressure block 3 is rotatably provided on the detection head 41. The detection roller 42 contacts the eccentric pressure block 3 to realize the connection or disconnection control, thereby achieving the purpose of control, and the travel switch 4 is a self-resetting travel switch, so that when the pothole protection plate 2 returns to the initial state, the travel switch 4 is reset.

[0031] like Figure 2As shown, the eccentric pressure block 3 has a free end 31 at one end and a connecting end 32 at the other end. The connecting end 32 of the eccentric pressure block 3 is hingedly connected to the upper end of a connecting seat 21 arranged at one end of the pothole protection plate 2 through a connecting rod 33, and the lower end of the connecting seat 21 is hingedly connected to the chassis 1.

[0032] The eccentric pressure block 3 has two symmetrically arranged pressure block plates 34 , and a pressure block counterweight 35 is arranged between the pressure block plates 34 .

[0033] like Figure 1 As shown, a pressure block mounting seat 11 is provided on the chassis 1, and one end of the eccentric pressure block 3 close to the free end 31 is rotatably arranged between the chassis 1 and the pressure block mounting seat 11 through a mounting shaft 12. The pressure block mounting seat 11 plays a role in fixing the eccentric pressure block 3, and the eccentric pressure block 3 also rotates around the pressure block mounting seat 11.

[0034] Specifically, the pressure block mounting seat 11 is in an L-shaped structure, and a space for the eccentric pressure block 3 to swing is formed between the pressure block mounting seat 11 and the chassis 1, and a reinforcing block 13 connected to the chassis 1 is provided at the lower end of the pressure block mounting seat 11. The reinforcing block 13 supports and fixes the pressure block mounting seat 11, and also stabilizes the eccentric pressure block 3.

[0035] The side of the eccentric pressure block 3 away from the travel switch 4 has a limiting portion 36 corresponding to one side of the lower end of the pressure block mounting seat 11 .

[0036] Furthermore, the travel switch 4 is a normally open travel switch, and the voltage of the travel switch 4 is 24V when it is on and 0V when it is off. When the pothole protection plate 2 is open, the eccentric pressure block 3 touches the travel switch 4, the switch is disconnected, and the ECU module 5 detects that the voltage is 0V, and this state is the open state of the pothole protection plate 2; when the pothole protection plate 2 is retracted, the eccentric pressure block 3 does not touch the travel switch 4, the travel switch 4 automatically resets, and the ECU module 5 detects that the voltage is 24V, and this state is the retracted state of the pothole protection plate 2.

[0037] The principle of this embodiment is:

[0038] Combination Figure 5 and Figure 6 As shown, as the fork frame rises, the pothole protection mechanism is released under pressure, and the eccentric pressure block 3 and the pothole protection plate 2 are actively opened by their own weight. The eccentric pressure block 3 touches the travel switch 4. After the travel switch 4 is closed, it transmits an instruction to the ECU module 5 that the pothole protection plate 2 is fully opened, and the fork frame can continue to rise safely. If the pothole protection plate 3 is not fully opened, the eccentric pressure block 3 cannot touch the travel switch 4, and the ECU module 5 cannot detect the signal. At this time, a fault alarm will be issued to stop the fork frame from continuing to rise, thereby ensuring the safety of equipment operation.

[0039] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0040] Although this article uses more terms such as chassis 1, pressure block mounting seat 11, mounting shaft 12, reinforcement block 13, pothole protection plate 2, connecting seat 21, eccentric pressure block 3, free end 31, connecting end 32, connecting rod 33, pressure block plate 34, pressure block counterweight 35, limiter 36, travel switch 4, detection head 41, detection roller 42, ECU module 5, fork lifting drive mechanism 6, etc., it does not exclude the possibility of using other terms. The use of these terms is only to more conveniently describe and explain the essence of the utility model; interpreting them as any additional restrictions is contrary to the spirit of the utility model.

Claims

1. A high-position low-failure-rate travel switch, comprising a pothole protection plate (2) movably arranged on the outside of a chassis (1), characterized in that: The pothole protection plate (2) is linked to an eccentric pressure block (3) circumferentially oscillatingly arranged at one end of the chassis (1), and a travel switch (4) is provided on the upper side of the eccentric pressure block (3) so as to abut against one side of the eccentric pressure block (3) when the eccentric pressure block (3) circumferentially oscillates, and the travel switch (4) is connected to an ECU module (5).

2. A high-position low-failure-rate travel switch according to claim 1, characterized in that: The travel switch (4) is fixed to one end of the chassis (1) by means of mounting bolts, and the travel switch (4) is arranged to be inclined toward the eccentric pressure block (3).

3. A high-position low-failure-rate travel switch according to claim 1, characterized in that: The ECU module (5) is connected to the fork lifting drive mechanism (6).

4. A high-position low-failure-rate travel switch according to claim 1, 2 or 3, characterized in that: The travel switch (4) is a self-resetting travel switch, and one end of the travel switch (4) is provided with a detection head (41), and a detection roller (42) corresponding to the eccentric pressure block (3) is rotatably provided on the detection head (41).

5. A high-position low-failure-rate travel switch according to claim 1, characterized in that: The eccentric pressure block (3) has a free end (31) at one end and a connecting end (32) at the other end. The connecting end (32) of the eccentric pressure block (3) is hingedly connected to the upper end of a connecting seat (21) arranged at one end of the pothole protection plate (2) through a connecting rod (33), and the lower end of the connecting seat (21) is hingedly connected to the chassis (1).

6. A high-position low-failure-rate travel switch according to claim 5, characterized in that: The eccentric pressure block (3) has two symmetrically arranged pressure block plates (34), and a pressure block counterweight (35) is arranged between the pressure block plates (34).

7. A high-position low-failure-rate travel switch according to claim 5, characterized in that: A pressure block mounting seat (11) is provided on the chassis (1), and one end of the eccentric pressure block (3) close to the free end (31) is rotatably arranged between the chassis (1) and the pressure block mounting seat (11) via a mounting shaft (12).

8. A high-position low-failure-rate travel switch according to claim 7, characterized in that: The pressure block mounting seat (11) is of an L-shaped structure and a space for the eccentric pressure block (3) to swing is formed between the pressure block mounting seat (11) and the chassis (1). A reinforcing block (13) connected to the chassis (1) is provided at the lower end of the pressure block mounting seat (11).

9. A high-position low-failure-rate travel switch according to claim 8, characterized in that: The side of the eccentric pressure block (3) away from the travel switch (4) has a limiting portion (36) corresponding to one side of the lower end of the pressure block mounting seat (11).

10. A high-position low-failure-rate travel switch according to claim 1, characterized in that: The travel switch (4) is a normally open travel switch. The voltage of the travel switch (4) is 24V in the open state and 0V in the closed state.

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