A copper contact piece with buffer limiting protection pressure switch
Patent Information
- Application Number
- CN202522242310.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-23
- Publication Date
- 2026-09-11
- Estimated Expiration
- 2035-10-23
AI Technical Summary
[0002]压力开关一般应用于变速箱的换挡切换开关指示信号的作用，目前的压力开关的结构一般都是推杆往复运动触发铜接触片接通或断开，而铜接触片都是受推杆的挤压冲击力较大，再加上使用的变速箱小盖总成结构复杂、尺寸大、用户各种操作习惯、新能源车的自动切换档速度快、开关推杆组件按压力偏大的影响，开关往往出现电气腔的铜接触片被推杆组件挤压变形等故障现象，导致不能正常工作，最终引起售后故障率偏高，影响用户的使用
[0012]本实用新型的有益效果是：通过压力弹簧实现铜接触片接通时，不会随着推杆一直往内凹里顶，从而导致铜接触片的变形；推杆组件挤压过量时通过插头盖的限位，起到保护电气腔体总成的效果。
Smart Images
Figure CN224745643U_ABST
Abstract
Description
Technical Field
[0001] This utility model patent relates to a pressure switch with a copper contact piece having a buffer limit protection. Background Technology
[0002] Pressure switches are generally used as shift indicator signals in transmissions. Current pressure switches typically involve a push rod reciprocating to trigger the copper contacts to connect or disconnect. However, these copper contacts are subject to significant pressure and impact from the push rod. Furthermore, the complex structure and large size of the transmission cover assembly, various user operating habits, the fast automatic shifting speeds of new energy vehicles, and the relatively high pressing force of the switch push rod assembly often lead to malfunctions such as deformation of the copper contacts in the electrical cavity due to pressure from the push rod assembly. This results in malfunctions, ultimately causing a high after-sales failure rate and impacting user experience.
[0003] The original structure relied on a push rod to compress a top rod, causing the copper contact piece to connect. The compressive force was often quite large, and if it was too high, it would cause the copper contact piece to bend and deform severely, resulting in switch failure. If the compressive force of the push rod was too low, the switch travel would exceed the tolerance, leading to poor contact and also affecting its use. Utility Model Content
[0004] The purpose of this invention is to solve existing technical problems by proposing a pressure switch with a copper contact piece having buffer limit protection.
[0005] To achieve the above objectives, the present invention adopts the following technical solution: a pressure switch with a copper contact piece having buffer limit protection, a channel in the center of the plug cover, a push rod placed in the channel, the lower end of the push rod contacting the sealing gasket, the upper end of the push rod having a first reduction section and a second reduction section, a second reduction step surface being formed between the push rod and the second reduction section, and a first reduction step surface being formed between the second reduction section and the first reduction section, the copper contact piece being sleeved on the outside of the second reduction section, an actuator being provided between the recessed second reduction step surface, a push rod assembly driving the actuator to move the push rod up and down in the channel, and a buffer limit protection structure being provided inside the actuator.
[0006] Furthermore, the actuator includes a first return spring, a pressure spring, an insulating pad, and a gasket. The pressure spring is sleeved on the outside of the second reduced section, with its upper end abutting against the lower end of the copper contact piece and its lower end abutting against the surface of the second reduced step. An insulating pad is sandwiched between the upper end of the pressure spring and the lower end of the copper contact piece. The upper end of the copper contact piece is flush with the surface of the first reduced step. The gasket is riveted to the outside of the first reduced section, and a first return spring is provided between the gasket and the recess. The buffer limiting protection structure is a pressure spring.
[0007] Furthermore, the bushing is fitted onto the outside of the second narrowing section.
[0008] Furthermore, the upper end of the plug cover has a raised arc surface at the edge of the channel. The raised arc surface and the upper end surface of the plug cover form a clearance area for the lower end of the copper contact piece, and the upper end of the raised arc surface and the lower end of the contact point of the copper contact piece form a limit.
[0009] Furthermore, a limiting protrusion is provided on the inner edge of the second annular step surface, and a second protrusion is provided on the outer side of the lower end of the sealing gasket. The second protrusion is placed on the second annular step surface and is limited by the limiting protrusion.
[0010] Furthermore, the push rod assembly includes an upper push rod, a lower push rod, and a second return spring. The lower end of the upper push rod has a second concave recess, and the lower end face of the upper push rod is placed on the third annular step surface. The upper end of the lower push rod is located above the third annular step surface, and the outer wall of the upper end of the lower push rod has a second limiting protrusion. The upper end of the lower push rod moves within the second concave recess. The upper end face of the lower push rod has a third concave recess. The upper end of the second return spring abuts against the upper end of the second concave recess, and the lower end of the second return spring abuts against the lower end of the third concave recess. The lower end of the lower push rod passes through the electrical cavity and is located outside the housing.
[0011] Furthermore, a spring is provided between the upper end of the push rod and the sealing gasket.
[0012] The beneficial effects of this utility model are: when the copper contact piece is connected by the pressure spring, it will not be pushed inward by the push rod, thus preventing deformation of the copper contact piece; when the push rod assembly is squeezed excessively, the limit of the plug cover protects the electrical cavity assembly. Attached Figure Description
[0013] Figure 1 This is a cross-sectional view of the present patent.
[0014] Figure 2 This is a schematic diagram of the actuator structure.
[0015] Figure 3 This is a schematic diagram of the initial switching structure.
[0016] Figure 4 This is a schematic diagram of the initial limiting structure of the push rod. Detailed Implementation
[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.
[0018] Example 1 combined with appendix Figure 1-4A pressure switch with buffer limit protection for copper contact pieces includes a housing 1, a plug assembly 2, a plug cover 3, a push rod 4, copper contact pieces 5, a sealing gasket 6, a push rod assembly, and an actuator. The upper end of the housing has a through electrical cavity 7, within which are arranged sequentially from top to bottom a first annular step surface 8, a second annular step surface 9, and a third annular step surface 10. The upper end of the push rod assembly rests on the third annular step surface, the sealing gasket rests on the second annular step surface, the lower end of the plug cover rests on the sealing gasket via a washer 11, and the plug assembly rests on the first annular step surface. The lower end of the push rod has a recess 12, and the plug cover has a channel 13 in the center. The push rod is placed in the channel and moves up and down. The lower end of the push rod contacts the sealing gasket. The upper end of the push rod has a first reduction section 14 and a second reduction section 15. A second reduction step surface 16 is formed between the push rod and the second reduction section. A first reduction step surface 17 is formed between the second reduction section and the first reduction section. A copper contact piece is sleeved on the outside of the second reduction section. An actuator is provided between the recess and the second reduction step surface. The push rod assembly drives the actuator to move the push rod up and down in the channel. The actuator has a buffer limit protection structure.
[0019] A pressure switch with a copper contact piece having buffer limit protection includes an actuator comprising a first reset spring 18, a pressure spring 19, an insulating pad 20, and a gasket 21. The pressure spring is sleeved on the outside of a second reduced section, with its upper end abutting against the lower end of the copper contact piece and its lower end abutting against the surface of the second reduced step. An insulating pad is sandwiched between the upper end of the pressure spring and the lower end of the copper contact piece. The upper end of the copper contact piece is flush with the surface of the first reduced step. The gasket is riveted to the outside of the first reduced section. A first reset spring is provided between the gasket and the recess. The buffer limit protection structure is a pressure spring.
[0020] A pressure switch with copper contact piece having buffer limit protection, wherein bushing 22 is sleeved on the outside of the second reduced section.
[0021] A pressure switch with a copper contact piece having buffer limit protection has a raised arc surface 23 at the upper end of the plug cover located at the edge of the channel. The raised arc surface and the upper end surface of the plug cover form a clearance area at the lower end of the copper contact piece, and the upper end of the raised arc surface and the lower end of the contact point of the copper contact piece form a limit.
[0022] A pressure switch with a copper contact piece having buffer limit protection has a limit protrusion 24 on the inner edge of the second annular step surface and a second protrusion on the outer side of the lower end of the sealing gasket. The second protrusion is placed on the second annular step surface and is limited by the limit protrusion.
[0023] A pressure switch with a copper contact piece and buffer limit protection includes an upper push rod 25, a lower push rod 26, and a second return spring 27. The lower end of the upper push rod is provided with a second recess 28, and the lower end face of the upper push rod is placed on a third annular step surface. The upper end of the lower push rod is located above the third annular step surface, and the outer wall of the upper end of the lower push rod is provided with a second limiting protrusion 29. The upper end of the lower push rod moves within the second recess. The upper end face of the lower push rod is provided with a third recess 30. The upper end of the second return spring abuts against the upper end of the second recess, and the lower end of the second return spring abuts against the lower end of the third recess. The lower end of the lower push rod passes through the electrical cavity and is located outside the housing.
[0024] A pressure switch with a copper contact piece having a buffer limit protection, wherein a spring 31 is provided between the upper end of the upper push rod and the sealing gasket.
[0025] A pressure switch with a copper contact piece having a buffer limit protection, wherein the inner diameter of the spring is larger than the outer diameter of the push rod.
[0026] A pressure switch with copper contact piece having buffer limit protection effectively avoids the copper contact piece being squeezed and deformed, effectively solving the problem of damage to the electrical internal cavity assembly of the switch.
[0027] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.
Claims
1. A pressure switch with buffer limit protection for copper contact strip, characterized in that: The plug cover has a channel in the center, and the push rod is placed in the channel. The lower end of the push rod contacts the sealing gasket. The upper end of the push rod has a first reduction section and a second reduction section. A second reduction step surface is formed between the push rod and the second reduction section. A first reduction step surface is formed between the second reduction section and the first reduction section. A copper contact piece is sleeved on the outside of the second reduction section. An actuator is provided between the recess and the second reduction step surface. The push rod assembly drives the actuator to move the push rod up and down in the channel. A buffer limit protection structure is provided in the actuator.
2. A pressure switch with buffer limit protection for copper contact plates according to claim 1, characterized in that: The actuator includes a first return spring, a pressure spring, an insulating pad, and a gasket. The pressure spring is sleeved on the outside of the second narrowing section. The upper end of the pressure spring abuts against the lower end of the copper contact piece, and the lower end of the pressure spring abuts against the surface of the second narrowing step. An insulating pad is sandwiched between the upper end of the pressure spring and the lower end of the copper contact piece. The upper end of the copper contact piece is flush with the surface of the first narrowing step. The gasket is riveted to the outside of the first narrowing section. The first return spring is provided between the gasket and the recess. The buffer limiting protection structure is a pressure spring.
3. A pressure switch with buffer limit protection for copper contact strip as claimed in claim 2 wherein: The bushing is fitted onto the outside of the second narrowing section.
4. A pressure switch with buffer limit protection for copper contact strip as claimed in claim 2 wherein: The upper end of the plug cover has a raised arc surface at the edge of the channel. The raised arc surface and the upper end of the plug cover form a clearance area for the lower end of the copper contact piece, and the upper end of the raised arc surface and the lower end of the contact point of the copper contact piece form a limit.
5. A pressure switch with buffer limit protection for copper contact strip as claimed in claim 4 wherein: The inner edge of the second annular step surface is provided with a limiting protrusion, and the outer side of the lower end of the sealing gasket is provided with a second protrusion. The second protrusion is placed on the second annular step surface and is limited by the limiting protrusion.
6. A pressure switch with buffer limit protection for copper contact strip as claimed in claim 5 wherein: The push rod assembly includes an upper push rod, a lower push rod, and a second return spring. The lower end of the upper push rod has a second concave recess, and the lower end face of the upper push rod is placed on the third annular step surface. The upper end of the lower push rod is located above the third annular step surface, and the outer wall of the upper end of the lower push rod has a second limiting protrusion. The upper end of the lower push rod moves within the second concave recess. The upper end face of the lower push rod has a third concave recess. The upper end of the second return spring abuts against the upper end of the second concave recess, and the lower end of the second return spring abuts against the lower end of the third concave recess. The lower end of the lower push rod passes through the electrical cavity and is located outside the housing.
7. A pressure switch with buffer limit protection for copper contact strip as claimed in claim 6 wherein: A spring is provided between the upper end of the push rod and the sealing gasket.