Manual switch of electromagnetic brake

Abstract

The utility model discloses a manual switch of an electromagnetic brake, which comprises a handle which is rotatably driven and connected with a cam mechanism, the handle comprises a shaft sleeve, a handle rotating shaft, a rotating handle and a positioning pin, the shaft sleeve is fixed on a shell of the electromagnetic brake, the handle rotating shaft is movably arranged in the shaft sleeve in a penetrating manner, and the inner end of the handle rotating shaft is connected with a main rotating shaft of the cam mechanism. A positioning hole is formed in the outer end face of the shaft sleeve, a through hole is formed from the outer end face to the inner end face of the rotating handle, the positioning pin penetrates through the through hole, and the front end of the positioning pin can be clamped in the positioning hole of the shaft sleeve. The handle rotates, drives and is connected with the cam mechanism to brake or release the friction plate, the handle structure can achieve self-locking positioning, and the situation that the cam is driven to mistakenly trigger a microswitch of the electromagnetic brake, and consequently signal transmission deviation is caused is avoided.

Description

Technical Field

[0001] The utility model relates to the field of electromagnetic brakes, in particular to a manual switch of an electromagnetic brake. Background Art

[0002] Electromagnetic brakes are used in the braking device of special drive motors. In the electric mode, when the brake coil is energized, the internal magnetic yoke attracts the armature to release the friction plate of the brake; when the external power supply disappears, the friction plate in the brake is immediately in the braking state. In addition to the electric mode, the manual mode can also be used. By manually rotating the handle, the handle drives the cam of the cam mechanism, and the rotation of the cam can drive the armature to compress or release the spring to achieve the purpose of braking or releasing the friction plate. During testing and use, due to the vibration of the equipment, the handle may produce the same vibration, causing the cam to touch the micro switch and cause deviation in signal transmission. Utility Model Content

[0003] In response to the problems existing in the prior art, the utility model provides a manual switch for the electromagnetic brake. The handle rotates to drive the connected cam mechanism to achieve friction plate braking or release, and the handle structure can achieve self-locking positioning, and will not drive the cam to mistakenly trigger the micro switch of the electromagnetic brake, resulting in signal transmission deviation.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] The manual switch of the electromagnetic brake includes a handle rotating and driving connection cam mechanism, the handle includes a sleeve, a handle shaft, a rotary handle and a positioning pin, the sleeve is fixed on the housing of the electromagnetic brake, the handle shaft is movably inserted into the sleeve, the inner end of the handle shaft is connected to the main shaft of the cam mechanism, and the outer end is fixed to the rotary handle, a positioning hole is provided on the outer end surface of the sleeve, a through hole is opened from the outer end surface to the inner end surface of the rotary handle, the positioning pin passes through the through hole, and the front end can be clamped in the positioning hole of the sleeve.

[0006] A further improvement is that the positioning pin includes a pin shaft, a screw handle, a clamping boss, a pin sleeve and a spring. The pin sleeve is fixed in the through hole, and the pin shaft passes through it. A spring is sleeved on the circumference of the middle section of the pin shaft and clamped in the pin sleeve. The outer end of the pin shaft is fixed at the center of the inner end of the screw handle. The clamping boss is fixed on the inner ends of the screw handle on both sides of the pin shaft. A clamping groove for docking with the clamping boss is provided on the outer end surface of the pin sleeve.

[0007] A further improvement is that a positioning groove is also provided on the outer end surface of the pin sleeve.

[0008] A further improvement is that the handle shaft or the rotary handle is fixedly connected to a grip, and pulling the grip is more labor-saving than rotating the rotary handle.

[0009] A further improvement is that the handle is tilted outwards below the rotating handle to facilitate holding.

[0010] A further improvement is that the cam mechanism includes a main shaft, a steering block, a connecting rod, a fixed block 1, a fixed block 2, a sub-shaft and a cam, the fixed block 1 movably penetrates the main shaft in the middle, and movably penetrates a sub-shaft at both ends, the rear ends of the main shaft and the sub-shaft are respectively fixedly connected to a steering block, and the other ends of the three steering blocks are movably connected to the middle and both ends of the connecting rod by pins, the front end of the main shaft is equipped with a cam, the front ends of the two sub-shafts are movably penetrated through the fixed block 2, and the front ends are equipped with a cam. The cam lifts the release support plate of the armature at three points, which is more stable and easy.

[0011] A further improvement is that the outer end surfaces of the steering block connected to the main shaft are respectively provided with positioning columns on both sides of the main shaft, and the main shaft and the positioning columns are fixedly connected to the handle shaft. The connection between the handle shaft and the main shaft is more firm and the torque is greater. Beneficial Effects

[0012] The present invention pulls the handle to rotate the rotary handle, driving the cam mechanism to brake or release the friction plate, and is easy to operate. At the same time, the handle structure has a positioning pin to achieve self-locking, and no false triggering due to false vibration will occur during detection and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of the utility model;

[0014] Figure 2 This is a side view of the handle of the utility model;

[0015] Figure 3 It is a three-dimensional schematic diagram of the cam mechanism of the utility model;

[0016] Figure 4 Figure a is a schematic diagram of the locating pin structure of the utility model, wherein Figure a is a schematic diagram of the separation of the pin shaft and the pin sleeve, Figure b is a diagram of the state in which the matching ends of the pin shaft and the pin sleeve are extended and inserted into the locating hole of the sleeve, and Figure c is a diagram of the state in which the matching ends of the pin shaft and the pin sleeve are pulled back and separated from the locating hole of the sleeve. DETAILED DESCRIPTION

[0017] like Figures 1 to 4As shown, the manual switch of the electromagnetic brake of the utility model comprises a handle 1 that is rotatably driven to connect the cam mechanism 2. The handle 1 comprises a sleeve 11, a handle shaft 12, a rotary handle 13 and a positioning pin 14. The sleeve 11 is fixed on the housing of the electromagnetic brake. The handle shaft 12 is movably arranged in the sleeve 11. The inner end of the handle shaft 12 is connected to the main shaft 21 of the cam mechanism, and the outer end is fixed to the rotary handle 13. A positioning hole 111 is provided on the outer end surface of the sleeve 11. A through hole is opened from the outer end surface to the inner end surface of the rotary handle 13. The positioning pin 14 passes through the through hole, and the front end can be clamped in the positioning hole 111 of the sleeve 11. A grip 15 is fixedly connected to the rotary handle 13, and the grip 15 is arranged outwardly tilted below the rotary handle 13.

[0018] The positioning pin 14 includes a pin shaft 141, a screw handle 142, a clamping boss 143, a pin sleeve 144 and a spring 145. The pin sleeve 144 is fixed in the through hole. The pin shaft 141 passes through the pin sleeve 144. A spring 145 is sleeved on the circumference of the middle section of the pin shaft 141 and clamped in the pin sleeve 144. The outer end of the pin shaft 141 is fixed to the center of the inner end of the screw handle 142. The clamping boss 143 is fixed to the inner ends of the screw handle 142 on both sides of the pin shaft. A clamping groove 146 for docking with the clamping boss 143 is provided on the outer end surface of the pin sleeve 144. A positioning groove 147 is also provided on the outer end surface of the pin sleeve 144.

[0019] The cam mechanism 2 includes a main rotating shaft 21, a steering block 22, a connecting rod 23, a fixed block 1 24, a fixed block 25, a sub-rotating shaft 26 and a cam 27. The middle of the fixed block 1 24 movably passes through the main rotating shaft 21, and the two ends movably pass through a sub-rotating shaft 26 respectively. The rear ends of the main rotating shaft 21 and the sub-rotating shaft 22 are respectively fixedly connected to a steering block 22, and the other ends of the three steering blocks 22 are respectively movably connected to the middle and both ends of the connecting rod 23 by pins. The front end of the main rotating shaft 21 is equipped with a cam 27, and the front ends of the two sub-rotating shafts 26 are respectively movably passed through the fixed block 25, and the front ends are equipped with a cam 27. The outer end surfaces of the steering block 22 connected to the main rotating shaft 21 on both sides of the main rotating shaft are respectively provided with positioning columns 28, and the main rotating shaft 21 and the positioning columns 28 are both fixedly connected to the handle rotating shaft 12.

[0020] The above is only a preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A manual switch for an electromagnetic brake, comprising a handle (1) which is rotationally driven to connect a cam mechanism (2), characterized in that: The handle (1) comprises a shaft sleeve (11), a handle shaft (12), a rotary handle (13) and a positioning pin (14); the shaft sleeve (11) is fixed on a housing of the electromagnetic brake; the handle shaft (12) is movably inserted into the shaft sleeve (11); the inner end of the handle shaft (12) is connected to a main shaft (21) of a cam mechanism; the outer end is fixed to the rotary handle (13); a positioning hole (111) is provided on the outer end surface of the shaft sleeve (11); a through hole is formed from the outer end surface to the inner end surface of the rotary handle (13); the positioning pin (14) passes through the through hole; and the front end can be snap-fitted into the positioning hole (111) of the shaft sleeve (11).

2. The manual switch of the electromagnetic brake according to claim 1, characterized in that: The positioning pin (14) comprises a pin shaft (141), a screw handle (142), a clamping boss (143), a pin sleeve (144) and a spring (145). The pin sleeve (144) is fixed in the through hole. The pin shaft (141) passes through the pin sleeve (144). A spring (145) is sleeved on the circumference of the middle section of the pin shaft (141) and clamped in the pin sleeve (144). The outer end of the pin shaft (141) is fixed to the center of the inner end of the screw handle (142). The clamping boss (143) is fixed to the inner ends of the screw handle (142) on both sides of the pin shaft. A clamping groove (146) for docking with the clamping boss (143) is provided on the outer end surface of the pin sleeve (144).

3. The manual switch of the electromagnetic brake according to claim 2, characterized in that: A positioning groove (147) is also provided on the outer end surface of the pin sleeve (144).

4. The manual switch of the electromagnetic brake according to claim 1, characterized in that: The handle rotating shaft (12) or the rotating handle (13) is fixedly connected to a grip (15).

5. The manual switch of the electromagnetic brake according to claim 4, characterized in that: The grip (15) is arranged below the rotary handle (13) and is tilted outward.

6. The manual switch of the electromagnetic brake according to claim 1, characterized in that: The cam mechanism (2) comprises a main rotating shaft (21), a steering block (22), a connecting rod (23), a fixed block 1 (24), a fixed block 2 (25), a sub-rotating shaft (26) and a cam (27). The fixed block 1 (24) movably passes through the main rotating shaft (21) in the middle, and movably passes through a sub-rotating shaft (26) at both ends. The rear ends of the main rotating shaft (21) and the sub-rotating shaft (26) are respectively fixedly connected to a steering block (22). The other ends of the three steering blocks (22) are respectively movably connected to the middle and both ends of the connecting rod (23) by pins. The front end of the main rotating shaft (21) is equipped with a cam (27). The front ends of the two sub-rotating shafts (26) movably pass through the fixed block 2 (25) and the front ends are equipped with a cam (27).

7. The manual switch of the electromagnetic brake according to claim 6, characterized in that: Positioning columns (28) are respectively provided on the outer end surfaces of the steering block (22) connected to the main rotating shaft (21) on both sides of the main rotating shaft, and the main rotating shaft (21) and the positioning columns (28) are both fixedly connected to the handle rotating shaft (12).

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