Anti-impact travel switch
By designing an anti-impact device including airbags and springs in the stroke switch, the problems of complex structure of the impact device and easy spring fatigue in the prior art are solved, and a longer equipment life and a lower production cost are achieved.
Patent Information
- Application Number
- CN202420838789.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-22
- Publication Date
- 2024-12-10
- Estimated Expiration
- 2034-04-22
AI Technical Summary
The impact-proof device of existing stroke switches has complex structure and cumbersome assembly, resulting in low production efficiency and high cost. It is often used to buffer a single spring easily fatigue and deform, which shortens the equipment life.
An anti-impact stroke switch is designed, and an anti-impact device including an upper sleeve, a lower sleeve, a pressing column, a push rod, a top rod, an airbag and a spring are used as a cushioning component to reduce the pressure on the spring. Extend life and simplify installation and removal with threaded connections.
It achieves a simple structure and easy to use anti-impact effect, extends the service life of the stroke switch, and shares the spring pressure through the airbag to avoid excessive spring fatigue and reduces production costs.
Smart Images
Figure CN222146009U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of travel switches, in particular to an anti-impact travel switch. Background Art
[0002] A travel switch is a type of position switch. It usually uses the collision of mechanical moving parts to move its contacts to connect or disconnect the control circuit to achieve a certain control purpose. Usually, the travel switch is used to limit the position or stroke of mechanical movement, so that the moving machinery can automatically stop, reverse, change speed or automatically reciprocate at a certain position or stroke.
[0003] Since the travel switch controls the circuit by moving the contacts through the collision of moving parts, the contacts may be damaged due to multiple collisions of moving parts when used frequently. Therefore, it is necessary to design an anti-impact device in the travel switch to reduce the damage to the contacts caused by the collision. However, the existing anti-impact device has a complex structure, cumbersome assembly and low production efficiency, resulting in high production costs. In addition, the anti-impact device generally only uses one spring as a buffer component, which is prone to fatigue and deformation during long-term use, resulting in a short service life of the travel switch. Utility Model Content
[0004] The utility model aims to provide an anti-impact travel switch in view of the defects and shortcomings of the prior art.
[0005] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: an anti-impact travel switch, including a shell, a reset spring and a contact assembly, an operating rod and a limit sleeve arranged in the shell, and its innovation lies in: an anti-impact device is also arranged inside the shell, and the anti-impact device includes an upper sleeve and a lower sleeve, and the top of the lower sleeve is folded inward to form a limit ring, and the outer wall of the limit ring is threadedly connected to the upper sleeve, and the same pressure column is arranged inside the upper sleeve and the lower sleeve, and a push rod is arranged at the top of the pressure column, and the push rod passes through the upper sleeve, and a push rod is arranged at the bottom of the pressure column. The push rod is arranged through the lower sleeve, at least three strip holes are provided on the side wall of the upper sleeve, and a pressure rod is arranged on the pressure column corresponding to the strip hole, the pressure rod moves in the strip hole, the outside of the pressure column is sleeved with a spring, the spring is located between the pressure rod and the limit ring, an air bag of an annular column structure is arranged inside the lower sleeve, and the air bag is sleeved on the push rod; the push rod abuts the operating rod, the push rod is arranged toward the contact assembly, the reset spring is sleeved on the outside of the upper sleeve and the lower sleeve, and one end of the reset spring abuts the operating rod, and the other end abuts the limit sleeve in the shell.
[0006] Furthermore, the push rod is threadedly connected to the pressure column.
[0007] Furthermore, the strip-shaped holes and the pressure rods are arranged in a ring array.
[0008] Furthermore, the height of the airbag is greater than the height of the spring.
[0009] Furthermore, the outer diameter of the airbag is smaller than the inner diameter of the lower sleeve.
[0010] After adopting the above structure, the utility model has the following beneficial effects:
[0011] The utility model has a simple structure and is easy to use. The anti-impact device is provided to protect the push rod and the contact assembly, so that the life of the travel switch including the corresponding contact assembly is improved. In addition, the air bag and the spring are used as buffer components at the same time. The air bag can withstand a part of the pressure, thereby preventing the spring from being overly compressed, thereby extending the service life of the spring. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 It is a schematic diagram of the structure of the utility model;
[0013] Figure 2 It is a schematic structural diagram of the anti-impact device in the utility model.
[0014] Description of reference numerals:
[0015] 1 housing, 2 return spring, 3 contact assembly, 4 operating rod, 5 limit sleeve, 6 anti-impact device, 61 upper sleeve, 62 lower sleeve, 63 limit ring, 64 pressure column, 65 push rod, 66 push rod, 67 strip hole, 68 pressure rod, 69 spring, 610 air bag. DETAILED DESCRIPTION
[0016] The utility model is further described below in conjunction with the accompanying drawings.
[0017] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be understood that the specific implementation methods described here are only used to explain the utility model and are not used to limit the utility model.
[0018] See also Figure 1-2An anti-shock travel switch comprises a housing 1, a reset spring 2, a contact assembly 3, an operating rod 4 and a limiting sleeve 5 arranged in the housing, an anti-shock device 6 is also arranged inside the housing 1, and the anti-shock device 6 comprises an upper sleeve 61 and a lower sleeve 62, and the top of the lower sleeve 62 is folded inward to form a limiting ring 63, and the outer wall of the limiting ring 63 is threadedly connected with the upper sleeve 61, and the upper sleeve 61 and the lower sleeve 62 are provided with a same pressure column 64, and a push rod 65 is arranged at the top of the pressure column 64, and the push rod 65 penetrates the upper sleeve 61, and a push rod 66 is arranged at the bottom of the pressure column 64, and the push rod 66 penetrates the lower sleeve 62, At least three strip holes 67 are provided on the side wall of the upper sleeve 61, and a pressure rod 68 is provided on the pressure column corresponding to the strip hole 67, and the pressure rod 68 moves in the strip hole 67. The outside of the pressure column 64 is sleeved with a spring 69, and the spring 69 is located between the pressure rod 68 and the limiting ring 63. An air bag 610 with an annular column structure is provided inside the lower sleeve 62, and the air bag 610 is sleeved on the push rod 66; the push rod 65 abuts the operating rod 4, and the push rod 66 is arranged toward the contact assembly 3. The reset spring 2 is sleeved on the outside of the upper sleeve 61 and the lower sleeve 62, and one end of the reset spring 2 abuts the operating rod 4, and the other end abuts the limiting sleeve 5 in the shell. Specifically, when external force acts on the operating rod 4, the operating rod 4 applies force to the pressure column 64 to move the pressure column 64, thereby pushing the push rod 66 to move and contact the contact assembly 3 and make the contact assembly 3 actuate, thereby disconnecting the circuit. During the movement, the strip hole 67 and the pressure rod 68 can control the stroke of the pressure column 64 so that the push rod 66 stops moving and does not continue to push the contact assembly 3, thereby protecting the contact assembly 3. The airbag 610 and the spring 69 buffer the pressure column 64, and the airbag 610 deforms to reduce the collision force. The two cooperate to protect the contact assembly 3. The airbag 610 can share the pressure of the spring 69, thereby avoiding excessive pressure on the spring, thereby extending the service life of the Yancheng spring. The upper sleeve 61 and the lower sleeve 62 are threadedly connected, which is conducive to the installation and disassembly of the interior.
[0019] In this embodiment, the push rod 65 is threadedly connected to the pressure column 64, which is convenient for disassembly and assembly of the two and is conducive to the replacement of parts at a later stage.
[0020] In this embodiment, the strip-shaped holes 66 and the pressing rods 68 are arranged in a circular array, so that the spring 69 is evenly stressed, which is conducive to pressing the spring 69 downward.
[0021] In this embodiment, the height of the airbag 610 is greater than the height of the spring 69, so that the airbag 610 is first subjected to the pressure of the pressure column, deformed, and cushioned to the pressure column, and then the spring 69 is subjected to pressure, reducing the pressure on the spring and extending the service life of the spring.
[0022] In this embodiment, the outer diameter of the airbag 610 is smaller than the inner diameter of the lower sleeve 62 , that is, the internal capacity of the lower sleeve 62 will not affect the deformation of the airbag 610 .
[0023] The above description is only used to illustrate the technical solution of the utility model rather than to limit it. Other modifications or equivalent substitutions made to the technical solution of the utility model by ordinary technicians in this field should be included in the scope of the claims of the utility model as long as they do not depart from the spirit and scope of the technical solution of the utility model.
Claims
1. An anti-shock travel switch, comprising a housing, a return spring, and a contact assembly, an operating rod and a limit sleeve arranged in the housing, characterized in that: The shell body is also provided with an anti-impact device, which includes an upper sleeve and a lower sleeve, and the top of the lower sleeve is folded inwardly to form a limiting ring, and the outer wall of the limiting ring is threadedly connected to the upper sleeve, and the same pressure column is arranged inside the upper sleeve and the lower sleeve, and a push rod is arranged on the top of the pressure column, and the push rod passes through the upper sleeve, and a push rod is arranged at the bottom of the pressure column, and the push rod passes through the lower sleeve, and at least three strip holes are provided on the side wall of the upper sleeve, and a pressure rod is arranged on the pressure column corresponding to the strip holes, and the pressure rod moves in the strip holes, and the outside of the pressure column is sleeved with a spring, and the spring is located between the pressure rod and the limiting ring, and an air bag of an annular column structure is arranged inside the lower sleeve, and the air bag is sleeved on the push rod; the push rod abuts the operating rod, and the push rod is arranged toward the contact assembly, and the reset spring is sleeved on the outside of the upper sleeve and the lower sleeve, and one end of the reset spring abuts the operating rod, and the other end abuts on the limiting sleeve in the shell.
2. The anti-shock travel switch according to claim 1, characterized in that: The push rod is threadedly connected to the pressure column.
3. The anti-shock travel switch according to claim 1, characterized in that: The strip-shaped holes and the pressure rods are arranged in a circular array.
4. The anti-shock travel switch according to claim 1, characterized in that: The height of the airbag is greater than the height of the spring.
5. The anti-shock travel switch according to claim 1, characterized in that: The outer diameter of the airbag is smaller than the inner diameter of the lower sleeve.