Cam switch convenient to maintain

Abstract

The utility model relates to the field of cam switches, and discloses a cam switch convenient to maintain, which comprises a shell, a mechanical mechanism and an electrical mechanism, the mechanical mechanism further comprises a control assembly, the control assembly comprises a cam and a rotating shaft which are matched with each other, and the electrical mechanism further comprises a mounting frame and a plurality of groups of moving contact modules, the moving contact module comprises a moving contact, a moving contact piece and a moving contact seat, a limiting groove is formed in the mounting frame, a through hole is formed in the bottom of the limiting groove, one side of the moving contact seat is inserted into the limiting groove, a mounting opening and a mounting cavity are formed in the side, inserted into the limiting groove, of the moving contact seat, and a fastener is connected between the moving contact seat and the mounting frame. The fastener comprises a threaded column and a clamping block, the clamping block slides into the mounting cavity and is clamped in the mounting cavity, and the threaded column penetrates through the through hole and is in threaded connection with the first fixing nut. According to the cam switch, the corresponding fault moving contact module can be more conveniently disassembled, and maintenance is more convenient.

Description

Technical Field

[0001] The present application relates to the field of cam switches, and in particular to a cam switch that is easy to maintain. Background Art

[0002] With the development of technology, the design and application of cam switches are more in line with people's needs, so cam switches have been widely used in various fields.

[0003] A cam switch is a controlled, operated switch that utilizes a cam mechanism to control the opening or closing of a circuit. Its operating principle is based on a cam on a cam controller, which is rotated by an operating handle via a rotating shaft to open or close the contacts, thereby controlling the circuit. When the moving and stationary contacts of a cam switch separate or come into contact, an arc is generated. This arc not only causes severe ablation and damage to the contacts, but also prolongs the circuit disconnection time, posing a potential risk to the load equipment. Therefore, regular inspection and maintenance are necessary. However, existing technologies make cam switches relatively complex to disassemble and maintain, increasing both the workload and the cost of maintenance. Utility Model Content

[0004] In order to improve the problem that the cam switch requires regular inspection and maintenance, the present application provides a cam switch that is easy to maintain.

[0005] The present application provides a cam switch that is easy to maintain and adopts the following technical solution:

[0006] A cam switch that is easy to maintain, which includes a shell, an electrical mechanism and a mechanical mechanism, the mechanical mechanism also includes an operating assembly, the operating assembly includes a matching cam and a rotating shaft, the electrical mechanism also includes a mounting frame and multiple groups of moving contact modules, the moving contact modules are arranged at intervals, the moving contact modules include a moving contact, a moving contact piece and a moving contact seat, the moving contact piece is rotatably connected to the moving contact seat, a limiting slot is provided on the mounting frame and a through hole is provided at the bottom of the limiting slot, one side of the moving contact seat is inserted into the limiting slot, the moving contact seat includes a mounting port and a mounting cavity, the mounting port and the mounting cavity pass through the moving contact seat in the direction of the arrangement of the moving contact modules, and the mounting port passes through the side of the moving contact seat in the direction of the limiting slot, a fastener is connected between the moving contact seat and the mounting frame, the fastener includes a threaded column and a clamping block, the clamping block slides into the mounting cavity and is clamped in the mounting cavity, the threaded column passes through the through hole and is threadedly connected with the first fixing nut.

[0007] Through the above technical solution, when one of the multiple moving contact modules is damaged, it is only necessary to loosen the corresponding fixing nut on the mounting frame, pull the moving contact seat out of the limit slot, and push the card block according to the arrangement direction of the moving contact module. When the card block is pushed out of the mounting cavity, the entire damaged moving contact module can be removed. Compared with the existing technology, which requires only removing the cam and the rotating shaft before continuing to remove the moving contact module, the cam switch of this application can more conveniently disassemble the corresponding faulty moving contact module, and maintenance is more convenient.

[0008] Optionally, the movable contact module further includes a reset spring, and a tooling slot is further provided on the side of the mounting frame facing the movable contact module. One end of the reset spring is connected to the movable contact piece, and the other end is inserted into and fixed in the tooling slot.

[0009] Through the above technical solution, the reset spring is inserted into and fixed in the tooling groove. When the movable contact piece swings, the reset spring is reset from the contracted state, pushing the movable contact piece to swing back, while reducing the possibility of radial deformation of the reset spring.

[0010] Optionally, the moving contact module also includes a fixed component, which includes a pressure spring, a card and a fixed connector. The two ends of the fixed connector respectively pass through the moving contact and the moving contact piece and are both equipped with a card. The pressure spring is sleeved on the fixed connector, and one end of the pressure spring presses against the moving contact and the other end presses against the card.

[0011] Through the above technical solution, an arc will be generated when the contacts separate and contact, and the arc will cause ablation and destruction of the contacts. Therefore, when the moving contact module moves too many times, partial ablation will occur on the contact, which will increase the distance between the contacts. A pressure spring is provided here to push the moving contact to make the contacts fit more closely.

[0012] Optionally, a positioning groove is formed on a side of the movable contact piece facing the movable contact, and the movable contact is inserted into the positioning groove.

[0013] Through the above technical solution, the moving contact can be inserted into the positioning groove of the moving contact piece. When the moving contact piece drives the moving contact to move back and forth, the positioning groove reduces the deviation caused by the shaking of the moving contact.

[0014] Optionally, the movable contact piece is further provided with a limiting hole for a card to pass through, and the limiting hole is a non-circular hole.

[0015] Through the above technical solution, the card can pass through the limiting hole, and after passing through the limiting hole, the card rotates the fixed connecting piece, so that the card can be stuck on the hole mouth of the limiting hole to prevent the card from being pulled back, and the installation and disassembly of the fixed connecting piece is more convenient.

[0016] Optionally, a shockproof groove is formed at the opening of the limiting hole on a side of the movable contact piece facing away from the movable contact, and the card is clamped in the shockproof groove.

[0017] Through the above technical solution, the card passes through the limiting hole and rotates to fit into the shockproof groove. When the moving contact swings repeatedly, the moving contact shakes, which can prevent the fixed connection part from rotating due to shaking, reducing the possibility of shaking and disengagement of the moving contact.

[0018] Optionally, the mechanical mechanism also includes a handle assembly, the handle assembly includes an operating handle and a transverse limiting rod, the rotating shaft includes an operating end, the end of the operating end is provided with a placement groove, the operating handle includes a connecting end that is sleeved on the operating end, the connecting end is provided with a fixing groove, and the transverse limiting rod is inserted into the fixing groove and the placement groove.

[0019] Through the above technical solution, the handle and the shaft can be conveniently rotated synchronously, which is convenient for installation and maintenance.

[0020] Optionally, the handle assembly further includes a fastening stud, which is coaxially fixed to the transverse limiting rod; one side of the transverse limiting rod abuts against the wall of the fixing groove, and the other side is a slope and the slope abuts against the bottom of the placement groove, and the fastening stud passes through the fixing groove and is threadedly connected and fixed with the second fixing nut.

[0021] Through the above technical solution, when the second fixing nut is connected to the fastening stud, the inclined surface of the transverse limiting rod moves toward the second fixing nut, deepening the threaded connection between the fastening stud and the second fixing nut.

[0022] In summary, this application has at least the following beneficial effects:

[0023] 1. The arc generated when the moving contact and the static contact of the cam switch are separated or contacted will cause severe ablation and damage to the contacts. Therefore, when one of the multiple moving contact modules is damaged, it is only necessary to loosen the first fixing nut corresponding to the mounting frame, pull the moving contact seat out of the limit slot, and push the card block toward the arrangement direction of the moving contact module. When the card block is pushed out of the mounting cavity, the entire damaged moving contact module can be removed. Compared with the existing technology, the moving contact module can only be removed after the cam and the rotating shaft are removed. The cam switch of this application can more conveniently disassemble the corresponding faulty moving contact module, and maintenance is more convenient.

[0024] 2. When the cam switch is in a high-intensity working environment, the moving contact of the cam switch is prone to damage. However, in the existing technology, the cam and the rotating shaft can only be removed first, and then the moving contact module can be removed, and finally the moving contact can be removed. The steps for replacing the moving contact are cumbersome and the maintenance cost is high. Therefore, this application is provided with a fixing component. When a moving contact is damaged, the card is pushed and rotated toward the static contact, and the fixing component can be removed through the limit hole, and then the damaged moving contact can be removed, reducing additional steps and operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 An exploded diagram of a cam switch for easy maintenance;

[0026] Figure 2 It is a schematic diagram of the electrical mechanism structure;

[0027] Figure 3 This is an exploded schematic diagram of the electrical structure;

[0028] Figure 4 is a cross-sectional view of the electrical structure;

[0029] Figure 5 This is an exploded diagram of the moving contact module;

[0030] Figure 6 It is a cross-sectional view of the mechanical mechanism;

[0031] Figure 7 An exploded view of the handle assembly.

[0032] Figure numerals: 1, housing; 11, top housing; 12, bottom housing; 2, electrical mechanism; 21, moving contact module; 211, moving contact; 2111, elongated hole; 212, moving contact piece; 2121, positioning groove; 2122, limiting hole; 2123, shockproof groove; 2124, pulley; 213, moving contact seat; 2131, mounting cavity; 2131-1, first limiting surface; 2132, mounting port; 214, fixing assembly; 2141, pressure spring; 2142, card; 2143, fixing connector; 215, reset spring; 22, mounting Frame; 221, static contact; 222, limiting groove; 223, through-hole; 224, tooling groove; 23, fastener; 231, threaded column; 232, block; 232-1, second limiting surface; 233, first fixing nut; 3, mechanical mechanism; 31, operating assembly; 311, rotating shaft; 3112, placement groove; 312, cam; 3121, groove; 32, handle assembly; 321, operating handle; 3211, connecting end; 3211-1, fixing groove; 322, horizontal limiting rod; 323, fastening stud; 324, second fixing nut. DETAILED DESCRIPTION

[0033] The following is a further detailed description with reference to the accompanying drawings:

[0034] As attached Figure 1 As shown, a cam switch that is easy to maintain includes a housing 1, an electrical mechanism 2 and a mechanical mechanism 3.

[0035] The housing 1 includes a top housing 11 and a bottom housing 12 , which are connected and fixed by bolts after being covered.

[0036] The electrical mechanism 2 is installed on both sides of the bottom shell 12 and is fixed at both ends by bolts. The electrical mechanism 2 includes a moving contact module 21 and a mounting frame 22 .

[0037] There are two mounting brackets 22, one on each side of the bottom housing 12, and a plurality of static contacts 221 are fixedly mounted on the upper ends of the mounting brackets 22. The static contacts 221 are located on one side of the facing surfaces of the two mounting brackets 22 and are evenly spaced.

[0038] As attached Figure 2 and attached Figure 3 As shown, the two mounting frames 22 have limiting slots 222 on their facing surfaces. The number of limiting slots 222 is equal to the number of static contacts 221. The limiting slots 222 are evenly spaced and correspond one to one with the static contacts 221. A through hole 223 is formed at the bottom of the limiting slots 222.

[0039] As attached Figure 1 The number of the moving contact modules 21 is equal to the number of the static contacts 221 , and the moving contact modules 21 are distributed side by side on both sides of the bottom shell 12 .

[0040] As attached Figure 5 As shown, the moving contact module 21 includes a moving contact 211 , a moving contact piece 212 , a moving contact seat 213 and a fixing assembly 214 .

[0041] As attached Figure 3 and attached Figure 4 As shown, one side of the movable contact base 213 is the mounting side, which is inserted into the limiting slot 222. The mounting side has a mounting cavity 2131 and a mounting opening 2132 extending through the movable contact base 213, parallel to the arrangement direction of the stationary contacts 221. The mounting cavity 2131 is rectangular and includes two first limiting surfaces 2131-1 parallel to the direction of the stationary contacts 221. The mounting opening 2132 connects the mounting cavity 2131 with the outer wall of the mounting side.

[0042] The movable contact seat 213 and the mounting bracket 22 are connected by a fastener 23. The fastener 23 further includes a threaded column 231 and a clamping block 232.

[0043] Two surfaces of the clamping block 232 are parallel to the two surfaces of the installation cavity 2131 , which are marked as second limiting surfaces 232 - 1 . Here, there are three groups of second limiting surfaces 232 - 1 , and the clamping block 232 is in the shape of a hexagonal prism.

[0044] The clamping block 232 slides into the mounting cavity 2131 and is clamped in the mounting cavity 2131, and the second limiting surface 232-1 is in contact with the first limiting surface 2131-1 and limits the rotation of the clamping block 232. The threaded column 231 passes through the mounting opening 2132 and the through hole 223, and is threadedly connected to the first fixing nut 233. By tightening the first fixing nut 233, the moving contact seat 213 remains inserted into the limiting groove 222 and presses against the bottom of the limiting groove 222.

[0045] The other side of the moving contact seat 213 relative to the installation side is rotatably connected to the moving contact piece 212. The rotation axis of the rotation connection is parallel to the arrangement direction of the static contacts 221. The moving contact piece 212 can rotate toward or away from the static contacts 221.

[0046] A positioning groove 2121 is formed on one end of the movable contact piece 212 close to the movable contact 211 , and the movable contact 221 is inserted into the positioning groove 2121 .

[0047] As attached Figure 5 As shown, the moving contact 211 and the moving contact piece 212 are connected and installed via a fixing assembly 214. The fixing assembly 214 includes a pressure spring 2141 and a fixing connector 2143.

[0048] The movable contact piece 212 is further provided with a limiting hole 2122 , which is rectangular in shape. An anti-vibration groove 2123 is further provided at the opening of the limiting hole 2122 on the side of the movable contact piece 212 facing away from the movable contact 211 .

[0049] Two other clips 2142 are symmetrically connected to both ends of the fixed connector 2143. When installing the fixed connector 2143, one end of the fixed connector 2143 is rotated to align the clips 2142 with the length of the limiting hole 2122. The end of the fixed connector 2143 is then passed through the elongated hole 2111 on the movable contact 211 and the limiting hole 2122 on the movable contact piece 212 in sequence. The fixed connector 2143 is then rotated again to align the passed clips 2142 with the anti-vibration groove 2123 and insert them into the anti-vibration groove 2123.

[0050] The pressure spring 2141 is located on a side of the moving contact 211 away from the static contact 221 and is sleeved on the fixed connector 2143 . One end of the pressure spring 2141 presses against the moving contact 211 , and the other end presses against the card 2142 .

[0051] As attached Figure 6 As shown, tooling slots 224 are further formed on the facing surfaces of the two mounting frames 22 , and the moving contact module 21 further includes a return spring 215 , one end of which is connected to the moving contact piece 212 , and the other end is inserted into and fixed in the tooling slot 224 .

[0052] The movable contact piece 212 further includes a pulley 2124 , which is rotatably connected to the bottom of the movable contact piece 212 .

[0053] As attached Figure 1 As shown, the mechanical mechanism 3 includes a manipulation assembly 31 and a handle assembly 32 .

[0054] As attached Figure 6 As shown, the operating assembly 31 includes a rotating shaft 311 and a cam 312 .

[0055] The shaft 311 is located between the two sets of moving contact modules 21. The cam 312 is sleeved and coaxially fixed to the side of the shaft 311. The two ends of the shaft 311 are respectively rotatably connected to the bottom shell 12, and one end is an operating end that passes through the outside of the bottom shell 12.

[0056] Pulley 2124 presses against the side of cam 312, and cam 312 has a groove 3121 on its side. When shaft 311 rotates, shaft 311 drives cam 312 to rotate, and pulley 2124 presses against the side of cam 312, sliding into and out of groove 3121 as cam 312 rotates. Coordinated with return spring 215, pulley 2124 is pressed against cam 312, thereby causing pulley 2124 to repeatedly swing the movable contact piece 212. The movable contact 211 and movable contact piece 212 are connected via fixing assembly 214. The movable contact piece 212 drives the movable contact 211 to repeatedly swing, causing the movable contact 211 to contact and separate with the stationary contact 221, thereby controlling the circuit.

[0057] As attached Figure 7 As shown, the handle assembly 32 includes an operating handle 321 , a transverse limiting rod 322 and a fastening stud 323 .

[0058] The operating handle 321 also includes a connecting end 3211 that is sleeved on the operating end of the rotating shaft 311. The connecting end 3211 has a fixing slot 3211-1. The end of the operating end of the rotating shaft 311 has a placement slot 3112. The transverse limiting rod 322 is inserted into the fixing slot 3211-1 and the placement slot 3112.

[0059] The fastening stud 323 is coaxially fixed with the transverse limiting rod 322. One side of the transverse limiting rod 322 abuts against the wall of the fixing groove 3211-1, and the other side is an inclined surface and the inclined surface abuts against the bottom of the placement groove 3112. The fastening stud 323 passes through the fixing groove 3211-1 and is threadedly connected and fixed with the second fixing nut 324.

[0060] The maintenance process of this embodiment:

[0061] When a moving contact module 21 is damaged, loosen the first fixing nut 233 corresponding to the mounting bracket 22, pull the moving contact seat 213 out of the limiting groove 222, and after the moving contact seat 213 is pulled out, push the blocking block 232 in the arrangement direction of the moving contact module 21. After the blocking block 232 is pushed out of the mounting cavity 2131, remove the bottom end of the moving contact piece 212 from the reset spring 215, and the entire damaged moving contact module 21 can be removed.

[0062] When one of the moving contacts 211 is damaged, find the card 2142 that contacts the end of the pressure spring 2141, push the card 2142 toward the static contact 221, and rotate the card 2142. After the card 2142 is rotated, it can be moved out of the fixing assembly 214 through the limiting hole 2122, and then the damaged moving contact 211 can be removed.

[0063] The cam switch of the present application can be disassembled more conveniently to correspond to the faulty moving contact module 21, and maintenance is more convenient.

[0064] This specific embodiment is merely an explanation of the present application and is not a limitation of the present application. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed, but as long as they are within the scope of protection required by this application, they are protected by patent law.

Claims

1. A cam switch convenient for maintenance, comprising a housing (1), an electrical mechanism (2) and a mechanical mechanism (3), wherein the mechanical mechanism (3) further comprises an operating assembly (31), wherein the operating assembly (31) comprises a cam (312) and a rotating shaft (311) that cooperate with each other, and wherein the electrical mechanism (2) further comprises a mounting frame (22) and a plurality of groups of movable contact modules (21), wherein the movable contact modules (21) are arranged at intervals, and wherein the cam switch is characterized in that: The moving contact module (21) comprises a moving contact (211), a moving contact piece (212) and a moving contact seat (213); the moving contact piece (212) is rotatably connected to the moving contact seat (213); a limiting groove (222) is provided on the mounting frame (22); a through hole (223) is provided at the bottom of the limiting groove (222); one side of the moving contact seat (213) is plugged into the limiting groove (222); the moving contact seat (213) comprises a mounting opening (2132) and a mounting cavity (2131); the mounting opening (2132) and the mounting cavity (2131) are parallel to the moving contact seat. The arrangement direction of the head module (21) passes through the movable contact seat (213), and the mounting opening passes through the side of the movable contact seat (213) in the direction of the limiting groove (222). A fastener (23) is connected between the movable contact seat (213) and the mounting frame (22). The fastener (23) includes a threaded column (231) and a clamping block (232). The clamping block (232) slides into the mounting cavity (2131) and is clamped in the mounting cavity (2131). The threaded column (231) passes through the through hole (223) and is threadedly connected to the first fixing nut (233).

2. A cam switch that is easy to maintain according to claim 1, characterized in that: The movable contact module (21) further includes a reset spring (215), and a tooling slot (224) is provided on a side of the mounting frame (22) facing the movable contact module (21). One end of the reset spring (215) is connected to the movable contact piece (212), and the other end is inserted into and fixed in the tooling slot (224).

3. The cam switch for easy maintenance according to claim 1, characterized in that: The moving contact module (21) further includes a fixing assembly (214), the fixing assembly (214) including a pressure spring (2141), a card (2142) and a fixed connector (2143), the two ends of the fixed connector (2143) respectively passing through the moving contact (211) and the moving contact piece (212) and both are provided with a card (2142), the pressure spring (2141) is sleeved on the fixed connector (2143), and one end of the pressure spring (2141) abuts against the moving contact (211), and the other end abuts against the card (2142).

4. The cam switch for easy maintenance according to claim 3, characterized in that: A positioning groove (2121) is provided on a side of the movable contact piece (212) facing the movable contact (211), and the movable contact (211) is inserted into the positioning groove (2121).

5. The cam switch for easy maintenance according to claim 4, characterized in that: The movable contact piece (212) is also provided with a limiting hole (2122) for the card (2142) to pass through, and the limiting hole (2122) is a non-circular hole.

6. The cam switch for easy maintenance according to claim 5, characterized in that: A shockproof groove (2123) is provided at the opening of the limiting hole (2122) on the side of the movable contact piece (212) facing away from the movable contact (211), and the card (2142) is snapped into the shockproof groove (2123).

7. The cam switch for easy maintenance according to claim 1, characterized in that: The mechanical mechanism (3) further comprises a handle assembly (32), the handle assembly (32) comprising an operating handle (321) and a transverse limiting rod (322), the rotating shaft (311) comprising an operating end, the end of the operating end being provided with a placement slot (3112), the operating handle (321) comprising a connecting end (3211) sleeved on the operating end, the connecting end (3211) being provided with a fixing slot (3211-1), the transverse limiting rod (322) being inserted into the fixing slot (3211-1) and the placement slot (3112).

8. The cam switch for easy maintenance according to claim 7, characterized in that: The handle assembly (32) further comprises a fastening stud (323), which is coaxially fixed to the transverse limiting rod (322); one side of the transverse limiting rod (322) abuts against the wall of the fixing groove (3211-1), and the other side is an inclined surface which abuts against the bottom of the placement groove (3112); the fastening stud (323) passes through the fixing groove (3211-1) and is threadedly connected to the second fixing nut (324).

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