Waterproof electronic switch for forklift

Abstract

The utility model relates to a waterproof electronic switch for a forklift, and relates to the technical field of switches, the waterproof electronic switch comprises a shell, a shell cover, a contact assembly, a gear seat and a gear lever, the shell and the shell cover are enclosed by a mounting cavity; an accommodating groove is formed in the shell, and a pressing plate for blocking the accommodating groove is fixedly arranged on the shell; the contact assembly comprises a pin, a movable contact piece and a pressure spring which are arranged in the accommodating groove; a static contact is fixedly arranged on the pin, and a movable contact is fixedly arranged on the movable contact piece; the pressing plate is provided with a pressing hole, the gear seat is provided with a gear groove, and the moving contact is fixedly provided with a positioning pin. A positioning ring groove is formed in the positioning pin, and an elastic sealing ring is embedded in the positioning ring groove; according to the electronic switch, when the forklift provided with the electronic switch is applied to heavy rain weather and the positioning pin slides in the pressing hole in a reciprocating mode, the outer peripheral face of the elastic sealing ring abuts against the inner wall of the pressing hole all the time, and the possibility that outside water enters the containing groove from a gap between the positioning pin and the pressing hole is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of switches, and in particular to a waterproof electronic switch for a forklift. Background Art

[0002] A forklift's gear switch, a core component for controlling the truck's direction and speed, is typically located inside the cab, allowing the operator to manually select different gears to suit various operating requirements. Its operating principle is straightforward: through mechanical or electronic transmission mechanisms, the operator's gear selection instructions are precisely transmitted to the forklift's drive system. Once the operator selects a gear, the gear switch quickly responds, sending a corresponding signal. The drive system then adjusts the forklift's driving state accordingly, ensuring effective execution of the operator's instructions.

[0003] Among existing technologies, the forklift gear switch design, for example, with publication number CN217333922U, demonstrates a high level of technical integration. This design cleverly combines a lower housing, an upper housing, and a shift seat, creating a closed cavity within which the shift seat rotates flexibly, enabling precise shifting. Furthermore, this design incorporates multiple contact assemblies, secured to the lower housing via carefully designed mounting slots. Each contact assembly operates independently, ensuring stable and reliable signal transmission.

[0004] However, certain shortcomings remain when dealing with adverse weather conditions, particularly during heavy rain. A gap exists between the outer periphery of the position switch's pressure head and the inner perforated wall of the cover, creating a potential channel for moisture to penetrate. In heavy rainfall, rainwater can penetrate the lower housing through this gap, posing a threat to the contact assembly within. Once the contact assembly becomes damp, its electrical conductivity and mechanical stability are significantly compromised, further impacting the overall performance and service life of the position switch, leaving room for improvement. Utility Model Content

[0005] The purpose of this application is to provide a waterproof electronic switch for forklifts, which solves the problem in the above-mentioned related technologies that when used in heavy rain, external rainwater may enter the lower shell through the gap between the pressure head and the perforation, affecting the performance of the contact assembly.

[0006] The present application provides a waterproof electronic switch for a forklift using the following technical solution:

[0007] The cam is secured to the chassis and has an angular channel formed between the cam face and the chassis, and the cam face is engaged with the cam and the chassis, and the cam face is engaged with the cam and the chassis, and the cam face is engaged with the cam and the chassis, and the cam face is engaged with the cam and the chassis, and the cam face is engaged with the cam and the chassis, and the cam face is engaged with the cam and the chassis, and the cam face is engaged with the cam and the chassis, and the cam face is engaged with the cam and the chassis, and the cam face is engaged with the cam and the chassis,

[0008] By adopting the above technical solution, when a forklift equipped with the electronic switch is used in heavy rain, since an elastic sealing ring is fixed on the outer periphery of the positioning pin, and when the positioning pin slides back and forth in the pressure hole, the outer peripheral surface of the elastic sealing ring always abuts against the inner wall of the pressure hole, thereby reducing the possibility of external moisture entering the accommodating groove through the gap between the positioning pin and the pressure hole, thereby improving the waterproof performance of the electronic switch during use.

[0009] Optionally, an extension sleeve is fixedly provided on the opening edge of the pressure hole of the pressure plate toward the movable contact piece, the extension sleeve is sleeved on the outer circumference of the positioning pin, and the outer circumference of the elastic sealing ring can be tightly pressed against the inner wall of the extension sleeve.

[0010] By adopting the above technical solution, during the reciprocating sliding process of the locating pin in the pressure hole, the installation arrangement of the extension sleeve further limits the reciprocating sliding of the locating pin in the pressure hole, thereby improving the stability of the locating pin during the reciprocating sliding process.

[0011] Optionally, a guiding arc surface is provided on the inner edge of the opening of the extending sleeve facing the movable contact piece.

[0012] By adopting the above technical solution, during the assembly process of the positioning pin and the pressure plate, the positioning pin can be easily inserted into the interior of the extension sleeve along the guiding arc surface due to the provision of the guiding arc surface on the extension sleeve.

[0013] Optionally, a locking rod is fixedly provided on the side of the positioning pin facing the movable contact piece, and a locking through hole for the locking rod to be embedded and fixed is opened in the middle of the movable contact piece.

[0014] By adopting the above technical solution, due to the matching setting of the locking rod and the locking through hole, when the locating pin is installed, the locking rod on the locating pin is embedded into the locking through hole on the moving contact piece, thereby realizing rapid assembly between the locating pin and the moving contact piece, and also facilitating the later inspection and replacement of the locating pin.

[0015] Optionally, two ends of the compression spring are respectively pressed against the bottom side of the accommodating groove and one side of the movable contact piece, and a limiting sleeve for inserting the end of the compression spring is fixed on the bottom side of the accommodating groove.

[0016] By adopting the above technical solution, when the compression spring is installed, one end of the compression spring is limited due to the setting of the limiting sleeve in the accommodating groove, thereby reducing the possibility of the compression spring being misplaced or loosened during the extrusion process.

[0017] Optionally, a limiting protrusion is fixedly provided on the side of the movable contact piece away from the pin, and the end of the compression spring facing the movable contact piece is sleeved on the outer periphery of the limiting protrusion.

[0018] By adopting the above technical solution, when the compression spring is installed, the end of the compression spring that abuts the movable contact piece is synchronously sleeved on the outer periphery of the limiting protrusion, thereby limiting the end of the compression spring and enhancing the stability of the compression spring after installation.

[0019] Optionally, a positioning rod is fixedly provided on the bottom side of the limiting sleeve, and the end of the compression spring away from the movable contact piece is sleeved on the outer circumference of the positioning rod.

[0020] By adopting the above technical solution, the end of the compression spring inserted into the limiting sleeve is synchronously sleeved on the outer periphery of the positioning rod, thereby further improving the installation stability of the compression spring.

[0021] Optionally, a guiding slope is provided on the outer edge of the end of the positioning rod close to the movable contact piece.

[0022] By adopting the above technical solution, the end of the compression spring away from the movable contact piece is conveniently sleeved on the outer periphery of the positioning rod along the guiding inclined surface.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] 1. When a forklift equipped with the electronic switch is used in heavy rain and the positioning pin slides back and forth in the pressure hole, the outer peripheral surface of the elastic sealing ring always contacts the inner wall of the pressure hole, reducing the possibility of external moisture entering the accommodating groove through the gap between the positioning pin and the pressure hole, thereby improving the waterproof performance of the electronic switch during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0026] Figure 1It is a schematic diagram of the overall structure of an embodiment of the present application;

[0027] Figure 2 This is a schematic diagram of the explosion structure of an embodiment of the present application;

[0028] Figure 3 This is a partial cross-sectional structural diagram of the embodiment of the present application embodying the installation and cooperation of the positioning pin;

[0029] Figure 4 yes Figure 3 A magnified schematic diagram of part A;

[0030] Figure 5 This is a structural diagram of an embodiment of the present application showing the installation arrangement of an extension sleeve on a pressure plate;

[0031] Figure 6 It is a schematic diagram of a partial cross-sectional structure of the compression spring installation and cooperation according to an embodiment of the present application.

[0032] In the figure, 1. shell; 11. mounting cavity; 12. accommodating groove; 13. limiting sleeve; 14. positioning rod; 141. guide slope; 2. shell cover; 3. contact assembly; 31. pin; 311. static contact; 32. moving contact piece; 321. moving contact; 322. locking through hole; 323. limiting protrusion; 33. compression spring; 34. positioning pin; 341. positioning ring groove; 342. locking plug rod; 35. elastic sealing ring; 4. gear seat; 41. gear rod; 42. gear groove; 5. pressure plate; 51. pressure hole; 52. extension sleeve; 521. guide arc surface. DETAILED DESCRIPTION

[0033] The present application is further described in detail below in conjunction with all the accompanying drawings.

[0034] Example:

[0035] Reference Figure 1 and Figure 2 A waterproof electronic switch for a forklift includes a housing 1, a housing cover 2 disposed on the housing 1, a contact assembly 3, and a gear seat 4. The housing 1 and the housing cover 2 are both made of plastic and are fixedly connected by screws. After the housing 1 and the housing cover 2 are assembled, they form a mounting cavity 11 into which the gear seat 4 is rotatably placed.

[0036] There are four groups of contact assemblies 3. Four accommodating grooves 12 for the four groups of contact assemblies 3 to be placed respectively are opened on the side of the shell 1 facing the shell cover 2, and a pressure plate 5 is fixedly provided for sealing the four accommodating grooves 12; a shift rod 41 is fixedly provided on the gear seat 4, which passes through the installation cavity 11 and extends to the outside of the shell 1. By toggling the shift rod 41, the gear seat 4 can be driven to rotate in the installation cavity 11, thereby controlling the movement of the contact assembly 3.

[0037] Reference Figure 2 and Figure 3 The contact assembly 3 includes two pins 31 fixedly mounted in the receiving groove 12, a movable contact piece 32 slidably mounted in the receiving groove 12, and two compression springs 33 installed in the receiving groove 12; each pin 31 is fixedly provided with a stationary contact 311, and each end of the movable contact piece 32 is fixedly provided with a movable contact 321. Under the pressure of the compression spring 33, the two movable contacts 321 can simultaneously abut against the stationary contacts 311 on the two pins 31;

[0038] A positioning pin 34 is fixed to the middle of the moving contact piece 32, and a pressure hole 51 for the positioning pin 34 to pass through is provided on the pressure plate 5, and a gear slot 42 is provided on the gear seat 4. The end of the positioning pin 34 away from the moving contact piece 32 passes through the pressure hole 51 and is inserted into the gear slot 42; when the gear seat 4 rotates, the positioning pin 34 can be rotated into or out of the gear slot 42, thereby squeezing the positioning pin 34 and the moving contact piece 32, thereby controlling the disconnection of the moving contact 321 and the static contact 311.

[0039] Reference Figure 3 and Figure 4 A positioning ring groove 341 is provided on the outer surface of the positioning pin 34, and an elastic sealing ring 35 made of rubber is embedded inside the positioning ring groove 341. When the positioning pin 34 slides back and forth in the pressure hole 51, the outer surface of the elastic sealing ring 35 always abuts against the inner wall of the pressure hole 51, reducing the possibility of external moisture entering the accommodating groove 12 through the gap between the positioning pin 34 and the pressure hole 51.

[0040] Reference Figure 5 and Figure 6 The pressure plate 5 is integrally formed with an extension sleeve 52 at the opening edge of the pressure hole 51 facing the movable contact piece 32, wherein the inner diameter of the extension sleeve 52 is the same as that of the pressure hole 51, and the extension sleeve 52 is sleeved on the outer peripheral surface of the positioning pin 34, thereby further limiting the reciprocating sliding of the positioning pin 34 in the pressure hole 51, and the elastic sealing ring 35 can be tightly pressed against the inner wall of the extension sleeve 52; a guide arc surface 521 is provided on the inner edge of the opening of the extension sleeve 52 facing the movable contact piece 32; when the positioning pin 34 and the pressure plate 5 are assembled, it is convenient for the positioning pin 34 to be inserted into the interior of the extension sleeve 52 along the guide arc surface 521.

[0041] Reference Figure 6 A locking rod 342 is integrally formed on the side of the positioning pin 34 facing the movable contact piece 32, and a locking through hole 322 is opened in the middle of the movable contact piece 32 for the locking rod 342 to be embedded and fixed, so as to achieve rapid assembly between the positioning pin 34 and the movable contact piece 32, and also facilitate the later inspection and replacement of the positioning pin 34.

[0042] Reference Figure 6The two ends of the compression spring 33 are respectively pressed against the bottom side of the accommodating groove 12 and one end of the movable contact piece 32; a limiting sleeve 13 for inserting the end of the compression spring 33 is integrally formed on the bottom side of the accommodating groove 12, and a positioning rod 14 is integrally formed on the bottom side of the limiting sleeve 13, and a guide inclined surface 141 is provided on the outer edge of the end of the positioning rod 14 close to the movable contact piece 32; a limiting protrusion 323 is integrally formed on the side of the movable contact piece 32 away from the pin 31, and a guide inclined surface 141 is provided on the outer edge of the end of the positioning rod 14 close to the movable contact piece 32.

[0043] After the compression spring 33 is installed, the end of the compression spring 33 away from the movable contact piece 32 is first sleeved on the outer periphery of the positioning rod 14 along the guide slope 141, and then the end of the compression spring 33 facing the movable contact piece 32 is sleeved on the outer periphery of the limiting protrusion 323, so as to reduce the possibility of the compression spring 33 being misplaced or loosened during the extrusion process.

[0044] The implementation principle of the embodiment of this application is:

[0045] When a forklift equipped with the electronic switch is used in heavy rain, due to the application of the elastic sealing ring 35 on the outer periphery of the positioning pin 34, when the positioning pin 34 slides back and forth in the pressure hole 51, the outer peripheral surface of the elastic sealing ring 35 always abuts against the inner wall of the pressure hole 51, reducing the possibility of external moisture entering the accommodating groove 12 through the gap between the positioning pin 34 and the pressure hole 51.

[0046] Unless otherwise defined, the terms or scientific terms used in this application should have the usual meanings understood by people with ordinary skills in the field to which this application belongs. The "first", "second", "third" and similar words used in this application do not indicate any order, quantity or importance, but are only used to distinguish different components. "A" or "one" and other similar words do not indicate a quantity limit, but rather indicate the existence of at least one. "Include" or "comprising" and other similar words mean that the elements or objects appearing before "include" or "comprising" cover the elements or objects listed after "include" or "comprising" and their equivalents, and do not exclude other elements or objects. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0047] The examples of this specific embodiment are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, any equivalent changes made based on the structure, shape, and principle of this application should be included in the scope of protection of this application.

Claims

1. A waterproof electronic switch for a forklift, comprising a housing (1), a housing cover (2) disposed on the housing (1), a contact assembly (3), a gear seat (4), and a gear lever (41) fixedly disposed on the gear seat (4); the housing (1) and the housing cover (2) are surrounded by a mounting cavity (11) for the gear seat (4) to be rotatably placed therein; a receiving groove (12) is formed on the side of the housing (1) facing the housing cover (2), and a pressure plate (5) is fixedly disposed thereon for sealing the receiving groove (12); The contact assembly (3) comprises a pin (31) fixedly arranged in the receiving groove (12), a movable contact piece (32) slidably arranged in the receiving groove (12), and a compression spring (33) installed in the receiving groove (12); a static contact point (311) is fixedly arranged on the pin (31), and a movable contact point (321) is fixedly arranged on the movable contact piece (32) and abuts against the static contact point (311) under the pressure of the compression spring (33); a pressure hole (51) is provided on the pressure plate (5), a gear slot (42) is provided on the gear seat (4), and a positioning pin (34) is fixedly arranged on the movable contact piece (32) and passes through the pressure hole (51) and can be inserted into the gear slot (42); It is characterized by: The outer peripheral surface of the positioning pin (34) is provided with a positioning ring groove (341), an elastic sealing ring (35) is embedded in the interior of the positioning ring groove (341), and the outer peripheral surface of the elastic sealing ring (35) is tightly pressed against the inner wall of the pressure hole (51).

2. A waterproof electronic switch for a forklift according to claim 1, characterized in that: The pressure plate (5) is fixedly provided with an extension sleeve (52) on the opening edge of the pressure hole (51) facing the movable contact piece (32); the extension sleeve (52) is sleeved on the outer peripheral surface of the positioning pin (34); and the outer peripheral surface of the elastic sealing ring (35) can be tightly pressed against the inner wall of the extension sleeve (52).

3. A waterproof electronic switch for a forklift according to claim 2, characterized in that: A guiding arc surface (521) is provided on the inner edge of the opening of the extension sleeve (52) facing the movable contact piece (32).

4. The waterproof electronic switch for a forklift according to claim 1, characterized in that: A locking rod (342) is fixedly provided on the side of the positioning pin (34) facing the movable contact piece (32), and a locking through hole (322) for the locking rod (342) to be embedded and fixed is provided in the middle of the movable contact piece (32).

5. The waterproof electronic switch for a forklift according to claim 1, characterized in that: The two ends of the compression spring (33) are respectively pressed against the bottom side of the accommodating groove (12) and one side of the movable contact piece (32), and a limiting sleeve (13) for inserting the end of the compression spring (33) is fixed on the bottom side of the accommodating groove (12).

6. The waterproof electronic switch for a forklift according to claim 5, characterized in that: A limiting protrusion (323) is fixedly provided on the side of the movable contact piece (32) away from the pin (31), and the end of the compression spring (33) facing the movable contact piece (32) is sleeved on the outer periphery of the limiting protrusion (323).

7. The waterproof electronic switch for a forklift according to claim 5, characterized in that: A positioning rod (14) is fixedly provided on the bottom side of the limiting sleeve (13), and the end of the compression spring (33) away from the movable contact piece (32) is sleeved on the outer periphery of the positioning rod (14).

8. The waterproof electronic switch for a forklift according to claim 7, characterized in that: A guiding inclined surface (141) is provided on the outer edge of the end portion of the positioning rod (14) close to the movable contact piece (32).

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