High stability vehicle gear sensor

Abstract

The utility model relates to sensor technical field, concretely is a kind of high-stability vehicle gear sensor, including upper shell and lower shell, the middle part of upper shell is equipped with fixed sealing cavity, the both ends of upper shell top are all provided with mounting groove, the top of lower shell is provided with round cavity, the bottom of lower shell is embedded and is installed with the contact of one end into round cavity, the top of contact is connected with wire, after the plug-in cooperation of upper shell and lower shell, the assembly groove that can be installed for sealing ring is formed between upper shell and lower shell, one end of wire is out of fixed sealing cavity, the fixed sealing cavity is filled with the solidified glue that is filled to the contact and wire fixed sealing, the utility model can eliminate the mold line of sealing surface when the integrated molding of upper shell and lower shell of prior art by the split type structure design of upper shell and lower shell, avoid the situation of leakage to occur due to the fact that mold line has destroyed sealing.

Description

Technical Field

[0001] This utility model relates to the field of sensor technology, specifically to a highly stable vehicle gear position sensor. Background Technology

[0002] As a core component for vehicle gear position signal detection, the sealing performance of existing vehicle gear position sensors directly determines the sensor's operational stability, service life, and the reliability of vehicle gear control. To achieve structural integration and ease of assembly, existing technologies generally employ a one-piece injection molding process for the upper and lower housings of the sensor. This process involves molding a complete housing structure using a mold, and pre-set sealing grooves at corresponding positions on the housing for installing sealing rings. The cooperation between the sealing ring and the sealing groove achieves isolation and sealing between the sensor's internal cavity and the external environment. However, this structure still requires improvement, as detailed below: In this solution, during the injection molding process, the parting surface (mold-fitting surface) of the mold needs to be set to correspond to the position of the sealing groove. After injection molding, the fitting marks of the mold parting surface will form a mold-fitting line on the groove wall, bottom, or edge of the sealing groove. This mold-fitting line is essentially an inherent structural defect brought about by the injection molding process, manifested as raised edges, tiny burrs, or irregular steps extending along the sealing groove. The mold-fitting line destroys the sealing performance and causes leakage. Therefore, a highly stable vehicle gear position sensor is needed to improve the above problems. Utility Model Content

[0003] To address the issue that the gear position sensor housing was previously injection molded as a single piece, leaving parting lines in the groove, which could prevent the sealing ring from fully fitting and thus pose a leakage risk, this invention provides a highly stable vehicle gear position sensor to solve the aforementioned problems.

[0004] To achieve the above objectives, this utility model provides the following technical solution: A highly stable vehicle gear position sensor includes an upper housing and a lower housing. A sealing cavity is formed in the middle of the upper housing, and mounting grooves are provided at both ends of the top of the upper housing.

[0005] The top of the lower housing has a circular cavity, and a contact with one end extending into the circular cavity is embedded in the bottom of the lower housing. A wire is connected to the top of the contact.

[0006] After the upper housing and the lower housing are inserted and fitted together, an assembly groove is formed between the upper housing and the lower housing for the installation of the sealing ring. One end of the wire extends out of the sealing cavity, and the sealing cavity is filled with curing adhesive to seal the contacts and the wire.

[0007] As a preferred embodiment of this utility model, a T-shaped block is integrally formed on one side of the outer wall of the upper shell, and an I-shaped groove is formed between the T-shaped block and the upper shell.

[0008] As a preferred embodiment of this utility model, there are multiple connecting rings, and a wire harness sleeve is commonly fitted on each connecting ring. A wire harness binding strap is wound inside the I-shaped groove, and one end of the wire harness binding strap passes around the wire harness sleeve and is connected to the fixed end of the wire harness binding strap.

[0009] As a preferred embodiment of this utility model, a connecting block is fixed to the inner wall of the sealing cavity. The connecting block is in the shape of an inverted "L". An arc-shaped protrusion is integrally formed on the side wall of the connecting block. The inner wall of the lower housing is provided with a mounting hole adapted to the arc-shaped protrusion. When the lower housing is inserted into the sealing cavity, the arc-shaped protrusion extends into the mounting hole.

[0010] As a preferred embodiment of this utility model, the bottom of the lower housing has a through mounting hole with a communicating circular cavity, and the connecting ring is embedded in the mounting hole.

[0011] As a preferred embodiment of this utility model, a conductive block is fixed to one end of the wire that extends into the sealing cavity, a connecting tube is fixedly sleeved on the outer wall of the conductive block, a first mounting cylinder is fixed to the bottom end of the outer wall of the connecting tube, a second mounting cylinder is rotatably connected to the bottom of the first mounting cylinder, the connecting tube, the first mounting cylinder and the second mounting cylinder are all interconnected, and limit blocks are fixed to both ends of the inner wall of the second mounting cylinder.

[0012] As a preferred embodiment of this utility model, the connecting ring is fixedly sleeved on the outer wall of the tip that extends into the circular cavity. The connecting ring has a stepped groove, and the inner wall of the stepped groove has a limiting groove. The second mounting cylinder is inserted into the stepped groove, and the limiting block is inserted into the limiting groove. When the outer wall of the first mounting cylinder is threaded into the inner wall of the stepped groove, the tip of the top of the contact contacts the conductive block.

[0013] As a preferred embodiment of this utility model, the outer wall of the first mounting cylinder is provided with an external thread, and the upper surface of the inner wall of the stepped groove is provided with an internal thread adapted to the external thread on the first mounting cylinder.

[0014] As a preferred embodiment of this utility model, limit holes are provided at both ends of the outer wall of the second mounting cylinder, and step holes with connecting step grooves are provided at both ends of the outer wall of the connecting ring. A step rod is slidably fitted on the step hole. The thin end of the step rod passes through the thin hole of the step hole, extends out of the connecting ring, and is fixedly connected to a handle. A spring is sleeved on the outer wall of the thin end of the step rod. The two ends of the spring abut against the thick end of the step rod and one side of the inner wall of the step hole, respectively. The end of the thick end of the step rod is hemispherical. When the second mounting cylinder is threaded into the step groove, the thick end of the spring is fitted into the limit hole.

[0015] As a preferred embodiment of this utility model, the mounting groove is a multi-step hollow groove, and a mounting ring adapted to the shape of the mounting groove is fitted on the mounting groove.

[0016] Compared with the prior art, the present invention, through the separate structure design of the upper shell and the lower shell, can eliminate the parting line of the sealing surface when the upper shell and the lower shell are integrally formed in the prior art, and avoid leakage caused by the parting line damaging the sealing performance.

[0017] Through the structural design of the connecting block, the arc-shaped protrusion and the mounting hole, during the assembly of the upper and lower housings, when the lower housing is inserted into the sealing cavity, the edge of the lower housing will abut against the arc-shaped protrusion, thereby pushing the connecting block to the side. Then, after the lower housing is inserted into the sealing cavity, the arc-shaped protrusion will be locked into the mounting hole, thus achieving the initial positioning of the upper and lower housings, which facilitates further operation and processing.

[0018] Through the structural design of conductive block, connecting tube, first mounting cylinder, second mounting cylinder, connecting ring, stepped groove and limiting groove, when connecting wire and contact, the threaded engagement of the second mounting cylinder and stepped groove can first enable the connecting ring and wire to be connected and limited. At the same time, the engagement of spring and limiting hole enables secondary reinforcement after the connecting ring and wire are connected, further improving the stability of the connection. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the internal structure of the upper shell of this utility model; Figure 3 This is a schematic diagram of the mating structure between the connecting block and the mounting hole of this utility model; Figure 4 This is a schematic diagram of the bottom structure of the lower shell of this utility model; Figure 5 This is a schematic diagram of the assembly structure of the contact and the wire of this utility model; Figure 6 For the present utility model Figure 5 A magnified view of the structure at point A in the middle; Figure 7 This is a schematic diagram of the assembly structure of the second mounting cylinder and the connecting ring of this utility model; Figure 8 This is a schematic diagram of the assembly structure of the mounting ring of this utility model.

[0020] In the diagram: 1. Upper shell; 11. Sealing cavity; 12. Mounting groove; 13. Connecting block; 14. Arc-shaped protrusion; 15. T-shaped block; 2. Lower shell; 21. Circular cavity; 22. Mounting hole; 23. Assembly groove; 3. Conductive block; 31. Connecting pipe; 32. First mounting cylinder; 33. Second mounting cylinder; 331. Limiting hole; 34. Limiting block; 4. Contact; 5. Connecting ring; 51. Stepped groove; 52. Limiting groove; 53. Stepped hole; 54. Stepped rod; 55. Spring; 6. Wire; 7. Wire harness sleeve; 8. Wire harness binding strap; 9. Mounting ring. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0022] Example 1: Please refer to Figure 1 , Figure 2 , Figure 4 and Figure 8 The vehicle gear position sensor shown includes an upper housing 1 and a lower housing 2. A sealing cavity 11 is provided in the middle of the upper housing 1, and mounting grooves 12 are provided at both ends of the top of the upper housing 1.

[0023] The top of the lower housing 2 has a circular cavity 21, and a contact 4 with one end extending into the circular cavity 21 is embedded in the bottom of the lower housing 2. A wire 6 is connected to the top of the contact 4.

[0024] After the upper housing 1 and the lower housing 2 are inserted and fitted, they are then welded together using laser welding technology to ensure a stable connection. An assembly groove 23 is formed between the upper housing 1 and the lower housing 2 for the installation of a sealing ring. One end of the wire 6 extends out of the sealing cavity 11, and the sealing cavity 11 is filled with curing adhesive to seal the contact 4 and the wire 6.

[0025] Both the upper shell 1 and the lower shell 2 are integrally injection molded from high-strength engineering plastics (such as PA66+30% glass fiber), which have excellent high and low temperature resistance, impact resistance and dimensional stability. The upper shell 1 has a hollow columnar structure, with a sealing cavity 11 extending through its middle along the axial direction. The inner diameter of the sealing cavity 11 is adapted to the outer diameter of the lower shell 2, providing an installation reference for the insertion and mating of the upper and lower shells.

[0026] Contact 4 is made of brass and machined, possessing excellent conductivity and wear resistance. Its quantity is set according to the vehicle gear detection requirements. The lower part of contact 4 is the detection end, which extends out of the bottom of the lower housing 2 and is adapted to the trigger structure of the vehicle gear shift fork. The upper part is the connection end, which extends into the circular cavity 21 of the lower housing 2 to connect the wire.

[0027] In this embodiment, specific references Figure 1 , Figure 2 , Figure 5 and Figure 8 A T-shaped block 15 is integrally formed on one side of the outer wall of the upper housing 1. An I-shaped groove is formed between the T-shaped block 15 and the upper housing 1. There are multiple contacts 4. A wire harness sleeve 7 is sleeved on the wire 6 connecting each contact 4. A wire harness binding strap 8 is wound in the I-shaped groove. One end of the wire harness binding strap 8 passes around the wire harness sleeve 7 and is connected to the fixed end of the wire harness binding strap 8.

[0028] The wire harness sleeve 7 wraps around the outside of multiple wires 6, providing integrated protection for the wires and preventing them from becoming tangled or rubbing against each other. The wire harness binding strap 8 is made of nylon, which has good toughness and weather resistance. One end is a fixed end and the other end is a movable end. The movable end passes through the wire harness sleeve 7 and then through the I-beam groove. It is locked to the fixed end through a ratchet structure, which fixes and organizes the wire harness. This prevents the connection between the conductive block 3 and the contact 4 from becoming loose due to vibration and pulling of the wires during vehicle operation. At the same time, it standardizes the wire harness routing and avoids interference with other components of the sensor.

[0029] Example 2: Please refer to Figure 3 , Figure 5 , Figure 6 and Figure 7 The vehicle gear position sensor shown includes an upper housing 1 and a lower housing 2. The upper housing 1 has a sealing cavity 11 in the middle. A connecting block 13 is fixed to the inner wall of the sealing cavity 11. The connecting block 13 is inverted "L" shape. An arc-shaped protrusion 14 is integrally formed on the side wall of the connecting block 13. The inner wall of the lower housing 2 has a mounting hole 22 that matches the arc-shaped protrusion 14. When the lower housing 2 is inserted into the sealing cavity 11, the arc-shaped protrusion 14 extends into the mounting hole 22.

[0030] In this embodiment, specific references Figure 5 The bottom of the lower housing 2 has a through mounting hole 22 that connects to the circular cavity 21, and the contact 4 is embedded in the mounting hole 22.

[0031] In this embodiment, specific references Figure 5 , Figure 6 and Figure 7One end of the wire 6 that extends into the sealing cavity 11 is fixed with a conductive block 3. A connecting tube 31 is fixedly sleeved on the outer wall of the conductive block 3. A first mounting cylinder 32 is fixed at the bottom of the outer wall of the connecting tube 31. A second mounting cylinder 33 is rotatably connected to the bottom of the first mounting cylinder 32. The connecting tube 31, the first mounting cylinder 32 and the second mounting cylinder 33 are all interconnected. Limiting blocks 34 are fixed at both ends of the inner wall of the second mounting cylinder 33.

[0032] The conductive block 3 is made of copper. One end of it is fixed to the wire 6 by crimping or welding. The wire 6 is a temperature-resistant and flame-retardant automotive-grade wire (such as AVS wire). The wire harness sleeve 7 (using corrugated tubing or braided mesh) is fitted on the outside to protect the wire from wear and tear. The outer wall of the conductive block 3 is fitted with a connecting tube 31 (insulating material, such as PPS plastic). The bottom end of the connecting tube 31 is integrally formed with a first mounting cylinder 32. The outer wall of the first mounting cylinder 32 is provided with an external thread (fine thread, such as M8×1) that matches the internal thread of the stepped groove 51 to ensure the tightness and anti-loosening of the threaded connection. The bottom of the first mounting cylinder 32 is rotatably connected to a second mounting cylinder 33 via a rotating shaft. The connecting tube 31, the first mounting cylinder 32 and the second mounting cylinder 33 are all hollow structures and interconnected to provide space for the contact between the conductive block 3 and the contact 4. Limiting blocks 34 are symmetrically fixed at both ends of the inner wall of the second mounting cylinder 33, and limiting holes 331 are opened at both ends of its outer wall corresponding to the positions of the stepped hole 53.

[0033] In this embodiment, specific references Figure 5 , Figure 6 and Figure 7 A connecting ring 5 is fixedly sleeved on the outer wall of the tip of the contact 4 that extends into the circular cavity 21. A stepped groove 51 is provided on the connecting ring 5. A limiting groove 52 is provided on the inner wall of the stepped groove 51. The second mounting cylinder 33 is inserted into the stepped groove 51. The limiting block 34 is inserted into the limiting groove 52. When the outer wall of the first mounting cylinder 32 is threaded into the inner wall of the stepped groove 51, the tip of the top of the contact 4 contacts the conductive block 3.

[0034] In this embodiment, specific references Figure 6 and Figure 7 The outer wall of the first mounting cylinder 32 is provided with an external thread, and the upper surface of the inner wall of the stepped groove 51 is provided with an internal thread that is adapted to the external thread on the first mounting cylinder 32.

[0035] In this embodiment, specific references Figure 7The second mounting cylinder 33 has limit holes 331 at both ends of its outer wall. The connecting ring 5 has step holes 53 through which the connecting step groove 51 is opened at both ends of its outer wall. A step rod 54 is slidably fitted on the step hole 53. The thin end of the step rod 54 passes through the thin hole of the step hole 53, extends out of the connecting ring 5, and is fixedly connected to a handle. A spring 55 is sleeved on the outer wall of the thin end of the step rod 54. The two ends of the spring 55 abut against the thick end of the step rod 54 and one side of the inner wall of the step hole 53, respectively. The end of the thick end of the step rod 54 is hemispherical. When the second mounting cylinder 33 is threaded into the step groove 51, the thick end of the spring 55 is fitted into the limit hole 331.

[0036] In this embodiment, specific references Figure 8 The mounting groove 12 is a multi-step hollow groove, and a mounting ring 9 adapted to the shape of the mounting groove 12 is fitted on the mounting groove 12.

[0037] In operation, the lower housing 2 is inserted axially into the sealing cavity 11 of the upper housing 1. During insertion, the outer wall of the lower housing 2 presses against the arc-shaped protrusion 14 of the connecting block 13, causing it to undergo elastic deformation. When the upper and lower housings are in place, the arc-shaped protrusion 14 aligns with the mounting hole 22 of the lower housing 2 and, under its own elastic restoring force, engages in the positioning hole, thus achieving rapid pre-fixation of the upper and lower housings. The limiting block 34 of the second mounting cylinder 33 is aligned with the limiting groove 52 of the stepped groove 51 and inserted. Then, the first mounting cylinder 32 is rotated so that it engages with the internal thread of the stepped groove 51 of the connecting ring 5 through the external thread. During the thread engagement, the second mounting cylinder 33 is driven to move towards the bottom of the stepped groove 52, thereby achieving coaxial positioning of the conductive block 3 and the contact 4. This ensures that the hemispherical tip of the contact 4 is in close contact with the end face of the conductive block 3, forming a reliable electrical connection. At this time, the limiting hole 331 of the second mounting cylinder 33 is aligned with the thick end of the stepped rod 54. Under the preload of the spring 55, the hemispherical structure of the thick end of the stepped rod 54 is inserted into the limiting hole 331, thereby locking the first mounting cylinder 32 and the connecting ring 5, preventing the threads from loosening due to vehicle vibration, and ensuring the stability of the electrical connection.

[0038] Epoxy resin-based curing adhesive is filled into the sealing cavity 11. The adhesive fills the internal gaps of the sealing cavity 11 and wraps around the root of the wire 6. After the adhesive cures, a seal and structural fixation are formed. Finally, the wire harness sleeve 7 is arranged to the preset path, and the movable end of the wire harness binding tape 8 is pulled to make it pass around the wire harness sleeve 7 and lock it in the I-shaped groove, thus completing the fixation of the wire and preventing the wire from being pulled and affecting the electrical connection.

[0039] The mounting ring 9 is embedded in the mounting groove 12 of the upper housing 1, and is fixed to the mounting surface of the vehicle gearbox housing by bolts passing through the mounting ring 9. The multi-step structure of the mounting groove 12 ensures that the sensor fits tightly with the gearbox housing after installation, improving shock resistance and installation accuracy.

[0040] All standard parts used in this application can be purchased from the market. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art and are also general components, which are common knowledge in this field.

[0041] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A highly stable vehicle gear position sensor, characterized in that, include: The upper housing (1) has a sealing cavity (11) in the middle and mounting grooves (12) at both ends of the top of the upper housing (1). The lower housing (2) has a circular cavity (21) at its top and a contact (4) with one end extending into the circular cavity (21) is embedded in the bottom of the lower housing (2). A wire (6) is connected to the top of the contact (4). After the upper housing (1) and the lower housing (2) are inserted and fitted together, an assembly groove (23) is formed between the upper housing (1) and the lower housing (2) for the installation of the sealing ring. One end of the wire (6) extends out of the sealing cavity (11), and the sealing cavity (11) is filled with curing adhesive to seal the contact (4) and the wire (6).

2. The highly stable vehicle gear position sensor according to claim 1, characterized in that: A T-shaped block (15) is integrally formed on one side of the outer wall of the upper shell (1), and an I-shaped groove is formed between the T-shaped block (15) and the upper shell (1).

3. The highly stable vehicle gear position sensor according to claim 2, characterized in that: There are multiple contacts (4), and a wire harness sleeve (7) is provided on the wire (6) connecting each contact (4). A wire harness binding strap (8) is wound in the I-shaped groove. One end of the wire harness binding strap (8) passes around the wire harness sleeve (7) and is connected to the fixed end of the wire harness binding strap (8).

4. The highly stable vehicle gear position sensor according to claim 1, characterized in that: The inner wall of the sealing cavity (11) is fixed with a connecting block (13). The connecting block (13) is inverted "L" shape. An arc-shaped protrusion (14) is integrally formed on the side wall of the connecting block (13). The inner wall of the lower housing (2) is provided with an installation hole (22) adapted to the arc-shaped protrusion (14). When the lower housing (2) is inserted into the sealing cavity (11), the arc-shaped protrusion (14) extends into the installation hole (22).

5. A highly stable vehicle gear position sensor according to claim 1, characterized in that: The bottom of the lower housing (2) has a through mounting hole (22) that connects to the circular cavity (21), and the contact (4) is embedded in the mounting hole (22).

6. The highly stable vehicle gear position sensor according to claim 1, characterized in that: One end of the wire (6) that extends into the sealing cavity (11) is fixed with a conductive block (3). A connecting tube (31) is fixedly sleeved on the outer wall of the conductive block (3). A first mounting cylinder (32) is fixed at the bottom of the outer wall of the connecting tube (31). A second mounting cylinder (33) is rotatably connected to the bottom of the first mounting cylinder (32). The connecting tube (31), the first mounting cylinder (32), and the second mounting cylinder (33) are all interconnected. Limiting blocks (34) are fixed at both ends of the inner wall of the second mounting cylinder (33).

7. A highly stable vehicle gear position sensor according to claim 6, characterized in that: The contact (4) has a connecting ring (5) fixedly sleeved on the outer wall of the tip that extends into the circular cavity (21). The connecting ring (5) has a stepped groove (51). The inner wall of the stepped groove (51) has a limiting groove (52). The second mounting cylinder (33) is inserted into the stepped groove (51). The limiting block (34) is inserted into the limiting groove (52). When the outer wall of the first mounting cylinder (32) is threaded into the inner wall of the stepped groove (51), the tip of the top of the contact (4) contacts the conductive block (3).

8. A highly stable vehicle gear position sensor according to claim 7, characterized in that: The outer wall of the first mounting cylinder (32) is provided with an external thread, and the upper surface of the inner wall of the stepped groove (51) is provided with an internal thread adapted to the external thread on the first mounting cylinder (32).

9. A highly stable vehicle gear position sensor according to claim 7, characterized in that: The second mounting cylinder (33) has limit holes (331) at both ends of its outer wall. The connecting ring (5) has a stepped hole (53) with a connecting stepped groove (51) at both ends of its outer wall. A stepped rod (54) is slidably fitted on the stepped hole (53). The thin end of the stepped rod (54) passes through the thin hole of the stepped hole (53), extends out of the connecting ring (5), and is fixedly connected to a handle. A spring (55) is sleeved on the outer wall of the thin end of the stepped rod (54). The two ends of the spring (55) abut against the thick end of the stepped rod (54) and one side of the inner wall of the stepped hole (53), respectively. The end of the thick end of the stepped rod (54) is hemispherical. When the second mounting cylinder (33) is threaded into the stepped groove (51), the thick end of the spring (55) fits in the limit hole (331).

10. A highly stable vehicle gear position sensor according to claim 1, characterized in that: The mounting groove (12) is a multi-step hollow groove, and a mounting ring (9) adapted to the shape of the mounting groove (12) is fitted on the mounting groove (12).

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