Novel differential lock pressure switch

Abstract

The utility model discloses a novel differential lock pressure switch, which belongs to the field of vehicle sensors, is used for a differential lock, and comprises a connecting base and a plug, the connecting base and the plug are inserted into a whole, the connecting base and the plug form a cavity for accommodating a sliding assembly, a spring contact pin is arranged in the connecting base in a sliding manner, and the spring contact pin is arranged in the cavity. The tail end of the spring contact pin is connected with one end of a sliding assembly, the other end of the sliding assembly is provided with an assembly contact corresponding to the terminal, one end of the terminal is located in the plug, and the other end of the terminal extends into a cavity formed by the connecting base and the plug. According to the technical scheme, the state of the differential lock can be sensed, the problem that the spring contact pin continues to move without damaging the contacted position is solved, the problem of stable operation of the sliding assembly is also solved, and it is guaranteed that the state of the differential lock is converted into an electric signal and stably transmitted to a vehicle control circuit.

Description

Technical Field

[0001] The present application belongs to the field of vehicle sensors, and more specifically, relates to a novel differential lock pressure switch. Background Art

[0002] The drive axle is a crucial component of a vehicle. The differential lock on the drive axle locks the differential housing and half-axles on the drive shaft together through a locking mechanism, disabling the differential's differential function and allowing full torque to be applied to the wheels that are not slipping. This fully utilizes the traction generated by these wheels, ensuring continued vehicle movement. Therefore, the function of the differential lock directly affects the vehicle's driving performance and safety.

[0003] Based on the above working process, the main function of the differential lock switch is that when the driver uses the differential lock function, the locking cylinder activates, pushing the piston, shift fork rod, and locking mechanism to lock the vehicle. At the same time, the locking cylinder squeezes the differential lock pressure switch contacts, generating a lock-in signal, notifying the driver that the differential lock function is engaged. Based on the same principle, when the driver deactivates the differential lock function, the locking cylinder depressurizes, the piston resets, and the differential lock pressure switch contacts reset, providing a lock disengagement signal.

[0004] For example, the patent document with Chinese patent publication number CN117386778A discloses a drive axle differential lock pressure switch arrangement structure, and specifically discloses the following technical contents: the reducer housing, pressure switch, and adjusting nut are installed together through threads, and air ducts are processed on the bridge housing, steel sleeve and bearing seat; the piston is assembled with the sliding meshing sleeve, and when the piston is pushed by air pressure, it will move axially with the sliding meshing sleeve, and the end face teeth of the sliding meshing sleeve are combined with the end face teeth of the differential housing; by installing the pressure switch on the reducer housing, the problem that the pressure switch cannot be arranged in a highly integrated differential lock is solved; the adjusting nut adjusts the position of the pressure switch to make its feedback signal more stable and reliable; when the piston moves axially, the conical surface controls the compression amount of the pressure switch contacts to ensure the accuracy of the pressure switch feedback signal.

[0005] Similarly, a vehicle inter-wheel differential lock pressure switch is also disclosed in the prior art, see the patent document with Chinese patent publication number CN216742694U, which specifically discloses the following technical solution: it includes a switch body, a sealing assembly and a threaded column, the bottom of the switch body is fixedly connected to the threaded column, the bottom of the switch body is provided with a probe, the probe is connected to the inside of the threaded column by embedding, a sealing assembly is provided below the switch body, the sealing assembly includes a sealing ring and an insert, the top of the sealing ring is fixedly connected to the insert, and a socket is provided at the bottom of the switch body, and the insert is inserted into the inside of the socket.

[0006] However, the above-mentioned prior art solution does not solve the problem that the spring contact pin continues to move without damaging the contacted position after the pressure switch is closed, and also does not solve the problem of stable operation of the sliding assembly. Summary of the Invention

[0007] The present application discloses a new differential lock pressure switch, which can sense the differential lock status and solve the problem of the spring contact pin continuing to move without damaging the contact position. It also solves the problem of stable operation of the sliding component, ensuring that the differential lock status is converted into an electrical signal and stably transmitted to the vehicle control circuit.

[0008] To achieve the above objectives, this application is implemented through the following technical solutions:

[0009] A new differential lock pressure switch described in the present application includes a connecting base and a plug. The connecting base and the plug are plugged into one body. The connecting base and the plug form a chamber for accommodating a sliding assembly. A spring contact pin is slidingly provided inside the connecting base. The tail end of the spring contact pin is connected to one end of the sliding assembly. The other end of the sliding assembly has an assembly contact corresponding to the terminal. One end of the terminal is located in the plug, and the other end of the terminal extends into the chamber formed by the connecting base and the plug.

[0010] As one of the preferred technical solutions, in the present application, the tail end of the spring contact pin is located in the contact pin sleeve, a contact pin return spring is provided between the bottom end of the contact pin sleeve and the bottom end of the spring contact pin, and the tail end of the contact pin sleeve is connected to the sliding assembly.

[0011] As one of the preferred technical solutions, in the present application, the tail end of the sliding component is processed with a placement hole for accommodating the component reset spring, and the terminal is integrally provided with a spring placement seat for placing the component reset spring.

[0012] As one of the preferred technical solutions, in the present application, a sealing ring B is provided at the connection position between the terminal and the connection base.

[0013] As one of the preferred technical solutions, in the present application, a sealing ring A is provided between the contact pin sleeve at a position close to the tail end and the connection base.

[0014] As one of the preferred technical solutions, in the present application, the tail end of the spring stylus has a stylus limit block, and the open end of the stylus sleeve for inserting the spring stylus has a closing structure that cooperates with the stylus limit block, and the spring stylus is limited in the stylus sleeve by the stylus limit block.

[0015] As one of the preferred technical solutions, in the present application, a threaded structure is provided on the outside of the connecting base.

[0016] As one of the preferred technical solutions, in the present application, the plug is integrally provided with a component limiting groove at one end facing the connection base, and a component limiting slider is slidably provided inside the component limiting groove, and the component limiting slider is integrally provided on the sliding component.

[0017] Compared with the prior art, the present invention has the following advantages:

[0018] 1. This application sets a sliding component with component contacts between the connecting base and the plug, and the sliding component can realize the contact and disconnection of the component contacts and the terminal end under the movement of the spring contact pin. The spring contact pin follows the movement of the differential lock locking cylinder, thereby realizing the status monitoring of the differential lock locking cylinder piston through the spring contact pin.

[0019] 2. The present application provides a contact pin sleeve between the connection position of the spring contact pin and the sliding assembly. The contact pin sleeve is provided with a contact pin return spring for the spring contact pin to continue to move and compress itself during the above movement. Therefore, when the assembly contact contacts the terminal, the spring contact pin has a certain distance to continue to move, thereby avoiding damage to the pressure switch.

[0020] 3. In the present application, by providing a component reset spring that cooperates with the sliding component and limiting the position of the component reset spring accordingly, the component reset spring can provide a reset force for the sliding component.

[0021] 4. In this application, a component limiting slider is provided on the sliding component. The component limiting slider can slide in the component limiting groove. The component limiting groove is located on the plug. The above structure can ensure the stability of the sliding component during the movement, thereby ensuring stable contact between the component contacts and the terminals. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This application is a three-dimensional Figure 1 .

[0023] Figure 2 This application is a three-dimensional Figure 2 .

[0024] Figure 3 This is the main view of this application.

[0025] Figure 4 yes Figure 3 Cross-sectional view at the position and direction shown in AA.

[0026] Figure 5 This application is decomposed Figure 1 .

[0027] Figure 6 This application is decomposed Figure 2 .

[0028] In the figure: 1. Spring contact pin; 2. Connecting base; 3. Plug; 4. Terminal; 5. Contact pin sleeve; 6. Contact pin return spring; 7. Sealing ring A; 8. Sliding assembly; 9. Sealing ring B; 10. Assembly return spring; 11. Spring placement seat; 12. Assembly contact; 13. Assembly limit slider; 14. Assembly limit slide groove; 15. Contact pin limit block; 16. Threaded structure. DETAILED DESCRIPTION

[0029] The technical solution described in this application is further described below with reference to the accompanying drawings and embodiments.

[0030] Example 1

[0031] See also Figures 1 to 6 A new differential lock pressure switch includes a connecting base 2, which can be connected to the differential lock housing via a threaded structure. The connecting base 2 is plugged into and connected to the plug 3 as a whole. The connecting base 2 and the plug 3 form a chamber for accommodating a sliding component 8. A movable sliding component 8 is provided in the chamber. One end of the sliding component 8 is driven by a spring contact pin 1. The sliding component 8 is provided with a component contact 12 at the end away from the spring contact pin 1. The component contact 12 cooperates with one end of the terminal 4 to realize the conduction or disconnection of the circuit. The terminal 4 is located on the plug 3 and is arranged in pairs, so that when it cooperates with the component contact 12, the circuit is connected or disconnected.

[0032] Example 2

[0033] Continue to see Figures 1 to 6 A new differential lock pressure switch, wherein the spring contact pin 1 is located in the contact pin sleeve 5, and a contact pin return spring 6 is provided between the bottom end of the spring contact pin 1 and the bottom end of the contact pin sleeve 5. The bottom end of the contact pin sleeve 5 is connected to one end of the sliding component 8. The sliding component 8 is processed with a placement hole for accommodating the component return spring 10 at the end away from the contact pin sleeve 5. One end of the component return spring 10 is located in the placement hole, and the other end of the component return spring 10 is located on the spring placement seat 11. The spring placement seat 11 is located on the plug 3 and is integrated with the plug 3.

[0034] The structure and connection relationship of the remaining parts are the same as the structure and connection relationship described in Example 1. In order to avoid cumbersome writing, they will not be repeated here. Those skilled in the art can refer to the structure and connection relationship described in Example 1 to understand the technical solution described in Example 2.

[0035] Example 3

[0036] Continue to see Figures 1 to 6A new differential lock pressure switch, wherein the spring contact pin 1 is provided with a contact pin limit block 15 at the bottom, the outer diameter of the contact pin limit block 15 is larger than the outer diameter of the spring contact pin 1, and the open end of the contact pin sleeve 5 has a necking structure and cooperates with the contact pin limit block 15 to achieve the limitation of the spring contact pin 1 and the contact pin sleeve 5.

[0037] A sealing ring A7 is provided at the position where the stylus sleeve 5 communicates with the cavity of the connecting base 2 , and a sealing ring B9 is provided at the position where the connecting base 2 connects with the plug 3 .

[0038] The structures and connection relationships of the remaining parts are the same as those described in Examples 1 to 2. To avoid cumbersome writing, they will not be described here. Those skilled in the art can refer to the structures and connection relationships described in Example 1 to understand the technical solution described in Example 2.

[0039] Example 4

[0040] Continue to see Figures 1 to 6 A new differential lock pressure switch, wherein the plug 3 is integrally provided with a component limiting groove 14 at the end facing the chamber, that is, the end facing the connection base 2, and a component limiting slider 13 is slidingly limited in the component limiting groove 14, and the component limiting slider 13 is integrated with the sliding component 8.

[0041] The structures and connection relationships of the remaining parts are the same as those described in Examples 1 to 3. To avoid cumbersome writing, they will not be described here. Those skilled in the art can refer to the structures and connection relationships described in Example 1 to understand the technical solution described in Example 2.

[0042] Based on the above embodiments, this application uses the following space to further describe the role or function of the technical features recorded in the embodiments in the technical solution of this application, so as to help technical personnel in this field to fully understand the technical solution recorded in this application and be able to reproduce it.

[0043] In the present application, the spring contact pin 1 can cooperate with the piston of the differential lock cylinder to follow the movement of the differential lock cylinder, and then realize the movement of the spring contact pin 1 under the push of the differential lock cylinder.

[0044] In the present application, the movement of the spring contact pin 1 can realize the movement of the sliding component 8. The component contacts 12 are symmetrically arranged on both sides of the sliding component 8. The component contacts 12 can contact with the corresponding terminals 4, thereby realizing the conduction of the electrical circuit formed by the terminals 4.

[0045] In this application, when the spring contact pin 1 is disengaged from the differential lock cylinder, the sliding assembly 8 can be reset under the action of the assembly return spring 10 in the receiving hole. During the reset process of the sliding assembly 8, the spring contact pin 1 can be reset along with the sliding assembly 8. One end of the assembly return spring 10 is placed in the receiving hole of the sliding assembly 8, and the other end of the sliding assembly 8 is placed on the spring receiving seat 11. The spring receiving seat 11 and the plug 3 form an integral structure.

[0046] In the present application, the spring contact pin 1 is located within the contact pin sleeve 5. A contact pin reset spring 6 is provided between the bottom end of the spring contact pin 1 and the bottom end of the contact pin sleeve 5. The contact pin reset spring 6 can increase the travel of the spring contact pin 1. For example, when the component contact 12 on the sliding component 8 driven by the spring contact pin 1 has contacted the terminal 4, the presence of the contact pin reset spring 6 can enable the spring contact pin 1 to continue to move without causing damage to the above-mentioned structure. As the spring contact pin 1 continues to move, the contact pin reset spring 6 will deform. During the process of resetting the spring contact pin 1, the contact pin reset spring 6 can push the spring contact pin 1 to reset together.

[0047] In the present application, to improve the stability of the movement of the sliding assembly 8, an assembly limiting slider 13 may be integrally provided on the sliding assembly 8. The assembly limiting slider 13 slides within an assembly limiting slot 14. The assembly limiting slot 14 guides and limits the sliding of the assembly limiting slider 13. This requires that the side surfaces or multiple end surfaces of the assembly limiting slider 13 can be aligned with and slide relative to the side surfaces or multiple end surfaces of the assembly limiting slot 14. The assembly limiting slot 14 is located on the plug 3, specifically, on the plate extending from the plug 3 toward the connection base 2.

[0048] In this application, the terminals 4 are connected to the interior of the plug 3 and are symmetrically arranged on the plug 3, corresponding to the component contacts 12. Each of the terminals 4 is connected to a corresponding wire, so that contact between the terminals 4 and the component contacts 12 completes the wire loop, and disconnects the wire loop when the terminals 4 and the component contacts 12 are separated. The vehicle ECU determines the status of the differential lock by determining whether the circuit is connected or disconnected.

[0049] Finally, it should be understood that although this specification describes the technical solutions of the present application according to specific embodiments, not every embodiment contains only one independent technical solution. The specification adopts this description method only for the purpose of clear description. Those skilled in the art should regard the description of this application as a whole. The technical solutions between the embodiments can be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A novel differential lock pressure switch, comprising a connecting base (2) and a plug (3), wherein the connecting base (2) and the plug (3) are plugged into one body, and characterized in that: The connecting base (2) and the plug (3) form a chamber for accommodating the sliding assembly (8); a spring contact pin (1) is provided inside the connecting base (2) for sliding movement; the tail end of the spring contact pin (1) is connected to one end of the sliding assembly (8); the other end of the sliding assembly (8) has a component contact (12) corresponding to the terminal (4); one end of the terminal (4) is located in the plug (3), and the other end of the terminal (4) extends into the chamber formed by the connecting base (2) and the plug (3).

2. A novel differential lock pressure switch according to claim 1, characterized in that: The tail end of the spring contact pin (1) is located in the contact pin sleeve (5), a contact pin return spring (6) is provided between the bottom end of the contact pin sleeve (5) and the bottom end of the spring contact pin (1), and the tail end of the contact pin sleeve (5) is connected to the sliding assembly (8).

3. A novel differential lock pressure switch according to claim 2, characterized in that: The tail end of the sliding component (8) is processed with a placement hole for accommodating the component reset spring (10), and the terminal (4) is integrally provided with a spring placement seat (11) for placing the component reset spring (10).

4. A novel differential lock pressure switch according to any one of claims 1 to 3, characterized in that: A sealing ring B (9) is provided at the connection position between the terminal (4) and the connection base (2).

5. A novel differential lock pressure switch according to any one of claims 2 to 3, characterized in that: A sealing ring A (7) is provided between the contact pin sleeve (5) and the connection base (2) at a position close to the tail end.

6. A novel differential lock pressure switch according to any one of claims 2 to 3, characterized in that: The tail end of the spring contact pin (1) is provided with a contact pin limiting block (15), and the open end of the contact pin sleeve (5) for inserting the spring contact pin (1) is provided with a closing structure that cooperates with the contact pin limiting block (15), and the spring contact pin (1) is limited in the contact pin sleeve (5) by the contact pin limiting block (15).

7. A novel differential lock pressure switch according to any one of claims 1 to 3, characterized in that: A threaded structure (16) is provided on the outside of the connecting base (2).

8. A novel differential lock pressure switch according to any one of claims 1 to 3, characterized in that: The plug (3) is integrally provided with a component limiting slide groove (14) at one end facing the connection base (2), and a component limiting slider (13) is slidably provided inside the component limiting slide groove (14), and the component limiting slider (13) is integrally provided on the sliding component (8).

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