Electric manual dual state no-current brake

Abstract

The present invention discloses an electric and manual dual-state current-free brake, which includes a pressure plate, a friction plate, an armature, a yoke, a cam mechanism and a release bracket arranged from bottom to top in a housing, an electromagnetic coil is arranged in the yoke, a cam mechanism and a manual micro switch and an electric micro switch located beside the cam are installed on the upper surface of the yoke, the release bracket includes a release plate and a guide rod, a through hole is opened on the yoke for the guide rod to pass through, a spring is sleeved on the guide rod in the through hole, the top end of the guide rod is connected to the release plate and the bottom end is connected to the armature, the cam of the cam mechanism can trigger the manual micro switch, a touch plate is arranged on the release plate close to the electric micro switch, which can trigger the electric micro switch, and the cam mechanism is driven to connect the handle outside the housing. The present invention has two working modes, electric and manual, with a reasonable structure, easy and reliable suction or release; the handle structure can realize self-locking positioning, and the cam will not be driven to trigger the micro switch of the electromagnetic brake by mistake due to vibration during use, resulting in signal transmission deviation.

Description

Technical Field

[0001] The invention relates to the field of electromagnetic brakes, in particular to an electric manual dual-state current-free brake. Background Art

[0002] Electromagnetic brakes are used in the braking device of special drive motors. They are an ideal automatic actuator in modern industry. They mainly play the role of transmitting power and controlling movement in mechanical transmission systems. When the brake coil is energized, the internal armature is attracted 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. It has the advantages of sensitive response, long service life, reliable use, and easy remote control. Summary of the invention

[0003] In view of the problems existing in the prior art, the present invention provides an electric and manual dual-state current-free brake having two working modes: electric and manual. In the electric mode, the armature is attracted by a magnetic yoke to put the friction plate in a released state; in the manual mode, the armature is driven by a cam to lift a release plate to put the friction plate in a released state. The brake has a reasonable structure and can be easily and reliably attracted or released.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] The electric manual dual-state current-free brake includes a pressure plate, a friction plate, an armature, a yoke, a cam mechanism and a release bracket which are arranged from bottom to top in a shell. An electromagnetic coil is installed in the yoke. A cam mechanism and a manual microswitch and an electric microswitch located beside the cam are installed on the upper surface of the yoke. A spring hole for placing a spring is opened on the yoke. The release bracket includes a release plate and a guide rod. A through hole is opened on the yoke for the guide rod to pass through from top to bottom. The top end of the guide rod is connected to the release plate and the bottom end is connected to the armature. The cam of the cam mechanism can trigger the manual microswitch. A touch pressure plate is arranged on the release plate close to the electric microswitch to trigger the electric microswitch. The cam mechanism is driven to connect to a handle outside the shell.

[0006] A further improved solution is that the housing comprises an upper end cover, a lower end cover and a peripheral cover, and the handle is connected to the peripheral cover, which is convenient for assembly.

[0007] A further improvement is that 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 arranged in 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. The handle structure can realize self-locking positioning, and will not cause the cam to mistakenly trigger the micro switch of the electromagnetic brake, resulting in signal transmission deviation.

[0008] A further improved scheme 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, the pin shaft passes through the pin sleeve, 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, and a clamping groove for docking with the clamping boss is provided on the outer end surface of the pin sleeve.

[0009] A further improvement is that a positioning groove is also provided on the outer end surface of the pin sleeve.

[0010] 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.

[0011] A further improvement is that the handle is tilted outwards under the rotating handle to facilitate holding.

[0012] 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.

[0013] 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 handle shaft is more firmly connected to the main shaft and has greater torque.

[0014] A further improvement is that the release plate is triangular, three spring holes are blind holes on the inner side of the electromagnetic coil in the yoke, and three spring holes are through holes on the outer side of the electromagnetic coil, and screws for adjusting the spring height are installed in the through holes. The inner and outer springs are evenly installed crosswise, so that the magnetic force of the armature and the spring can be evenly stressed, and the screws in the inner through holes can adjust the spring pressure. Beneficial Effects

[0015] 1. The brake device of the present application has two working modes: electric and manual. In the electric mode, the magnetic yoke attracts the armature to put the friction plate in a released state. In the manual mode, the cam lifts the release plate to drive the armature to put the friction plate in a released state. The structure is reasonable, and the attraction or release is easy and reliable.

[0016] 2. The handle of the present application rotates the cam, and the cam lifts the release plate to drive the armature to manually release the friction plate. The cam structure ensures that after the handle reaches the released state, it remains in the released state even if the hand is released. To restore it, the handle must be rotated, which is different from the situation where other brakes are restored by hand.

[0017] 3. The handle structure of the present application can realize self-locking positioning, and during use, the cam will not be driven by vibration to mistakenly trigger the micro switch of the electromagnetic brake, resulting in signal transmission deviation.

[0018] Fourth, the pressure of the spring between the yoke and the release plate of the device of the present application can be adjusted, and the armature magnetic force and the spring can be evenly stressed, making it easier and more reliable to attract or release. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 Schematic diagram of the disassembly of the structure of the present invention Figure 1 ;

[0020] Figure 2 Schematic diagram of the disassembly of the structure of the present invention Figure 2 ;

[0021] Figure 3 It is a cross-sectional view of the structure of the present invention;

[0022] Figure 4 It is a side view schematic diagram of the handle of the present invention;

[0023] Figure 5 It is a three-dimensional schematic diagram of the cam mechanism of the present invention;

[0024] Figure 6 It is a schematic diagram of the internal structure of the magnetic yoke of the present invention;

[0025] Figure 7 It is a schematic diagram of the locating pin structure of the present invention, 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

[0026] like Figures 1 to 7As shown, the present invention includes a housing in which a pressure plate 1, a friction plate 2, an armature 3, a yoke 4, a cam mechanism 5 and a release bracket 6 are arranged from bottom to top. The housing is assembled by an upper end cover 10, a lower end cover 11 and a peripheral cover shell 12. An electromagnetic coil 41 is installed in the yoke 4. The cam mechanism 5 and a manual micro switch 7 and an electric micro switch 8 located beside the cam are installed on the upper surface of the yoke 4. A spring hole 42 for placing a spring is opened on the yoke. The release bracket 6 includes a release plate 61 and a guide rod 62. A through hole 43 is opened on the yoke 4 for the guide rod 62 to pass through from top to bottom. The top end of the guide rod 62 is connected to the release plate 61 and the bottom end is connected to the armature 3. The cam of the cam mechanism 5 can trigger the manual micro switch 7. A touch plate 63 is arranged on the release plate 61 close to the electric micro switch to trigger the electric micro switch 8. The cam mechanism 5 is driven and connected to a handle 9 installed on the peripheral cover shell 12 outside the housing.

[0027] The handle 9 includes a sleeve 91, a handle shaft 92, a rotary handle 93 and a positioning pin 94. The sleeve 91 is fixed on the housing of the electromagnetic brake, and the handle shaft 92 is movably inserted into the sleeve 91. The inner end of the handle shaft 92 is connected to the main shaft 51 of the cam mechanism, and the outer end is fixed to the rotary handle 93. A positioning hole 911 is provided on the outer end surface of the sleeve 91, and a through hole is opened from the outer end surface to the inner end surface of the rotary handle 93. The positioning pin 94 passes through the through hole, and the front end can be clamped in the positioning hole 911 of the sleeve 91. The positioning pin 94 includes a pin shaft 941, a screw handle 942, a clamping boss 943, a pin sleeve 944 and a spring 945. The pin sleeve 944 is fixed in the through hole. The pin shaft 941 runs through the pin sleeve 944. A spring 945 is sleeved on the circumference of the middle section of the pin shaft 941 and clamped in the pin sleeve 944. The outer end of the pin shaft 941 is fixed to the center of the inner end of the screw handle 942. The clamping boss 943 is fixed to the inner end of the screw handle 942 on both sides of the pin shaft. A clamping groove 946 for docking the clamping boss 943 is provided on the outer end surface of the pin sleeve 944. A positioning groove 947 is also provided on the outer end surface of the pin sleeve 944, which is offset from the clamping groove. The handle shaft 92 or the screw handle 93 is fixedly connected with a grip 95. The grip 95 is arranged outwardly tilted below the screw handle 93. After the handle is rotated to the right position, rotate the handle of the positioning pin to make the clamping boss dock into the clamping groove, and the front end of the pin shaft extends out and clamps into the positioning hole on the shaft sleeve. At this time, the handle is locked and cannot be moved. When the handle needs to be turned, pull back the handle, the clamping boss of the positioning pin is clamped in the positioning groove, and the retracted end of the pin shaft is separated from the positioning hole on the shaft sleeve, and then it is unlocked.

[0028] The cam mechanism 5 includes a main rotating shaft 51, a steering block 52, a connecting rod 53, a fixed block 1 54, a fixed block 2 55, a sub-rotating shaft 56 and a cam 57. The middle of the fixed block 1 54 movably passes through the main rotating shaft 51, and the two ends movably pass through a sub-rotating shaft 56 respectively. The rear ends of the main rotating shaft 51 and the sub-rotating shaft 56 are respectively fixedly connected to a steering block 52, and the other ends of the three steering blocks 52 are respectively movably connected to the middle and two ends of the connecting rod 53 by pins. The front end of the main rotating shaft 51 is equipped with a cam 57, and the front ends of the two sub-rotating shafts 56 are respectively movably passed through the fixed block 2 55, and the front ends are equipped with a cam 57. The outer end surfaces of the steering block 52 connected to the main rotating shaft 51 on both sides of the main rotating shaft are respectively provided with positioning columns 58, and the main rotating shaft 51 and the positioning columns 58 are fixedly connected to the handle rotating shaft 92.

[0029] The release plate 61 is triangular in shape. The three spring holes 42 formed inside the electromagnetic coil 41 in the magnetic yoke 4 are blind holes. The three spring holes 42 formed outside the electromagnetic coil are through holes. Screws for adjusting the spring height are installed in the through holes.

[0030] During electric operation, when the electromagnetic coil is energized, the yoke generates electromagnetic attraction, the armature is attracted and compresses the spring, so that the friction plate is in a released state, and the friction plate can make axial movement synchronously through the gear shaft connected to the motor. At the same time, the release plate is lifted, and the touch plate on it triggers the electric microswitch to transmit the signal; when the electromagnetic coil is not energized, the yoke does not generate electromagnetic attraction, and the armature presses the friction plate under the action of the spring force, so that the friction plate is in a braking state, and the friction plate is connected to the motor through the gear shaft to achieve the purpose of braking the motor.

[0031] When working manually, by rotating the handle, the handle is connected to the cam of the cam mechanism. The rotation of the cam can lift or lower the release plate position, drive the armature to compress the spring or release the spring, so that the friction plate is released or braked. At the same time, the cam triggers the manual micro switch to transmit the signal.

[0032] The above is only a preferred embodiment of the present invention, and 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. Electric manual dual-state current-free brake, characterized by: The invention comprises a housing in which a pressure plate (1), a friction plate (2), an armature (3), a yoke (4), a cam mechanism (5) and a release bracket (6) are arranged from bottom to top. The yoke (4) is provided with an electromagnetic coil (41). The upper surface of the yoke (4) is provided with a cam mechanism (5) and a manual micro switch (7) and an electric micro switch (8) located beside the cam. The yoke is provided with a spring hole (42) for placing a spring. The release bracket (6) comprises a release plate (61) and a guide rod (62). The yoke (4) is provided with a through hole (43) for the guide rod (62) to pass through. The top end of the guide rod (62) is connected to the release plate (61) and the bottom end is connected to the armature (3). The cam of the cam mechanism (5) can trigger the manual micro switch (7). The release plate (61) close to the electric micro switch is provided with a touch plate (63) which can trigger the electric micro switch (8). The cam mechanism (5) is driven to connect to a handle (9) outside the housing.

2. The electric manual dual-state no-current brake according to claim 1, characterized in that: The housing comprises an upper end cover (10), a lower end cover (11) and a peripheral cover shell (12), and the handle (9) is connected to the peripheral cover shell (12).

3. The electric manual dual-state no-current brake according to claim 1, characterized in that: The handle (9) comprises a shaft sleeve (91), a handle rotating shaft (92), a rotary handle (93) and a positioning pin (94); the shaft sleeve (91) is fixed on the housing of the electromagnetic brake; the handle rotating shaft (92) is movably arranged in the shaft sleeve (91); the inner end of the handle rotating shaft (92) is connected to the main rotating shaft (51) of the cam mechanism; the outer end is fixed to the rotary handle (93); a positioning hole (911) is provided on the outer end surface of the shaft sleeve (91); a through hole is formed from the outer end surface to the inner end surface of the rotary handle (93); the positioning pin (94) passes through the through hole; and the front end can be clamped in the positioning hole (911) of the shaft sleeve (91).

4. The electric manual dual-state no-current brake according to claim 3, characterized in that: The positioning pin (94) comprises a pin shaft (941), a screw handle (942), a clamping boss (943), a pin sleeve (944) and a spring (945). The pin sleeve (944) is fixed in the through hole. The pin shaft (941) passes through the pin sleeve (944). A spring (945) is sleeved on the circumference of the middle section of the pin shaft (941) and clamped in the pin sleeve (944). The outer end of the pin shaft (941) is fixed at the center of the inner end of the screw handle (942). The clamping boss (943) is fixed on the inner ends of the screw handle (942) on both sides of the pin shaft. A clamping groove (946) for docking with the clamping boss (943) is provided on the outer end surface of the pin sleeve (944).

5. The electric manual dual-state no-current brake according to claim 4, characterized in that: A positioning groove (947) is also provided on the outer end surface of the pin sleeve (944).

6. The electric manual dual-state no-current brake according to claim 3, characterized in that: The handle rotating shaft (92) or the rotating handle (93) is fixedly connected to a gripping handle (95).

7. The electric manual dual-state no-current brake according to claim 6, characterized in that: The grip (95) is arranged below the rotary handle (93) and is tilted outward.

8. The electric manual dual-state no-current brake according to claim 1, characterized in that: The cam mechanism (5) comprises a main rotating shaft (51), a steering block (52), a connecting rod (53), a fixed block 1 (54), a fixed block 2 (55), a sub-rotating shaft (56) and a cam (57). The fixed block 1 (54) movably passes through the main rotating shaft (51) in the middle, and movably passes through a sub-rotating shaft (56) at both ends. The rear ends of the main rotating shaft (51) and the sub-rotating shaft (56) are respectively fixedly connected to a steering block (52). The other ends of the three steering blocks (52) are respectively movably connected to the middle and both ends of the connecting rod (53) by pins. The front end of the main rotating shaft (51) is equipped with a cam (57). The front ends of the two sub-rotating shafts (56) movably pass through the fixed block 2 (55) and the front ends are equipped with a cam (57).

9. The electric manual dual-state no-current brake according to claim 8, characterized in that: Positioning columns (58) are respectively provided on the outer end surfaces of the steering block (52) connected to the main rotating shaft (51) on both sides of the main rotating shaft, and the main rotating shaft (51) and the positioning columns (58) are both fixedly connected to the handle rotating shaft (92).

10. The electric manual dual-state no-current brake according to claim 1, characterized in that: The release plate (61) is quasi-triangular in shape, the three spring holes (42) provided inside the electromagnetic coil (41) in the magnetic yoke (4) are blind holes, and the three spring holes (42) provided outside the electromagnetic coil are through holes, and screws for adjusting the spring height are installed in the through holes.

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