Motor reverse rotation locking device

Abstract

The utility model provides a motor reverse rotation locking device, which adopts a mechanical lock structure, a torsion spring is tightly sleeved on a base, the circumference of the torsion spring is divided into a rotating section and a locking section by the head end and the tail end of the torsion spring, a rotating part connected with a driving module is arranged in the rotating section, and a locking part connected with an output module is arranged in the locking section. When the output module drives the locking piece to rotate, the torsional spring is shrunk to be locked with the base, so that the output module stops rotating, when the driving module drives the rotating piece to rotate, the torsional spring is expanded and fails, and therefore the output module is driven to rotate synchronously. According to the locking device, free rotation of the driving module end and rotation locking of the output module end can be achieved, the structure is ingenious, and the reverse rotation self-locking effect is good.

Description

Technical Field

[0001] The utility model relates to the technical field of motor drive control, in particular to a motor reverse locking device. Background Art

[0002] In order to ensure the safety of use, the motor is usually equipped with a brake device to brake the motor when the power is off. Especially when the motor is working under load, if the motor is not braked in time after the power is off, the load on the motor will cause the motor to reverse and cause danger.

[0003] Chinese patent CN201721154819.9 discloses a reduction motor with an electromagnetic brake function, including a reduction motor body provided with an output shaft and an electromagnetic brake connected to the output shaft, the electromagnetic brake including a yoke, a connecting plate, and a brake disc and an armature arranged between the yoke and the connecting plate, the yoke is connected to the reduction motor body by a first screw, the yoke is connected to the connecting plate by a second screw, a support sleeve is provided between the connecting plate and the yoke, the second screw passes through the support sleeve, a coil assembly is installed on the yoke, a spring groove is provided on the yoke facing the armature end, a compression spring elastically abutting against the armature is installed in the spring groove, the center hole of the brake disc is fixed to the connecting sleeve, a wire hole is provided at the bottom of the connecting plate, the coil assembly is provided with a lead wire, and the lead wire passes through the wire hole.

[0004] However, in the existing technical solutions, the motor brake usually adopts an electromagnetic lock structure, and an electromagnetic brake is mechanically connected to the end cover of the motor input end. When the power is off, the electromagnetic force disappears, the brake lining and the brake pad are locked, and the motor shaft stops rotating. Utility Model Content

[0005] The purpose of the utility model is to address the deficiencies of the prior art and provide a motor reversal locking device, which adopts a mechanical lock structure. A torsion spring is tightly arranged on a base, and the head and tail ends of the torsion spring divide its circumference into a rotation interval and a locking interval. The rotating part connected to the drive module is installed in the rotation interval, and the locking part connected to the output module is installed in the locking interval. When the output module drives the locking part to rotate, the torsion spring is tightened to lock with the base to stop the output module from rotating. When the drive module drives the rotating part to rotate, the torsion spring expands and fails, thereby driving the output module to rotate synchronously. The locking device of the utility model can realize the free rotation of the drive module end and the rotation locking of the output module end, and has an ingenious structure and a good reversal self-locking effect.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A motor reverse locking device comprises: a driving module, an output module and a locking module located between the driving module and the output module; when the driving module actively rotates, it drives the output module to rotate synchronously; when the output module actively rotates, it drives the locking module to lock internally to restrict the output module from continuing to rotate.

[0008] Preferably, the locking module comprises: a base, which is fixedly arranged; a torsion spring, which is sleeved on the outside of the base and the two are tightly installed, the head and tail ends of the torsion spring separate the circumference of the torsion spring, a rotation interval is formed between the outer sides of the head and tail ends, and a locking interval is formed between the inner sides of the head and tail ends; and a working module, when the working module rotates in the rotation interval, the friction forces the torsion spring to expand and rotate synchronously; when the working module rotates in the locking interval, the friction forces the torsion spring to lock and hold the base, so that the working module stops rotating further.

[0009] Preferably, the working module comprises: a rotating member, which is dynamically connected to the driving module, the rotating member comprising a rotating portion located within the rotating range, and which can come into contact with the head end or the tail end of the torsion spring when rotating forward and reversely; and a locking member, which is dynamically connected to the output module, the locking member comprising a locking portion located within the locking range, and which can come into contact with the head end or the tail end of the torsion spring when rotating forward and reversely.

[0010] Preferably, the lengths of the rotating portion and the locking portion are matched with the axial length of the torsion spring, thereby ensuring that the rotating portion and the locking portion can effectively contact the front and rear ends of the torsion spring.

[0011] Preferably, a clearance fit is formed between the rotating member and the head and tail ends of the torsion spring; and a clearance fit is formed between the locking portion and the head and tail ends of the torsion spring.

[0012] Preferably, the torsion spring has a first contact edge and a tail contact edge extending in a radial direction from both ends thereof to contact the rotating member or the locking member.

[0013] Preferably, the driving module is configured as a motor, the locking module is coaxially sleeved on the motor shaft, the rotating member is circumferentially fixedly mounted on the motor shaft, and the base is fixedly connected to the end cover of the motor.

[0014] Preferably, the rotating portion and the locking portion are both arranged in a fan shape, and a gap is arranged between them and the torsion spring in the radial direction.

[0015] Preferably, the output module comprises: an output module, which is dynamically connected to the locking module; and a reel, which is meshingly transmission-connected to the output module.

[0016] Preferably, the output end of the output module is provided with output teeth, the inner ring of the reel is provided with an inner gear ring, and the output teeth are meshingly connected with the inner gear ring.

[0017] The beneficial effects of the utility model are:

[0018] (1) The utility model provides a torsion spring tightly mounted on the base, and the head and tail ends of the torsion spring divide its circumference into a rotation zone and a locking zone. The rotating part connected to the driving module is installed in the rotation zone, and the locking part connected to the output module is installed in the locking zone. When the output module drives the locking part to rotate, the torsion spring is tightened to lock with the base, so that the output module stops rotating. When the driving module drives the rotating part to rotate, the torsion spring expands and becomes ineffective, thereby driving the output module to rotate synchronously. The locking device of the utility model can realize the free rotation of the driving module end and the rotation locking of the output module end. The structure is ingenious and the reverse self-locking effect is good.

[0019] (2) The locking device of the utility model connects its rotating part end to the motor output end, and the locking part end to the load structure, so that the motor rotates to drive the load to move during the power-on process, and the load end can be locked immediately when the power is off, preventing the load from driving the motor to reverse and causing danger or damage to the motor, thereby improving safety;

[0020] (3) The locking device of the utility model has a simpler structure and is easy to reset. By improving the torsion spring process, its surface is smooth and the friction is small. It can effectively avoid the torsion spring deformation, excessive wear and abnormal noise caused by the long-term expansion during operation. The service life of the torsion spring is greatly improved, which can reach 15,000 to 16,000 times. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0022] Figure 2 This is a front view of the main structure of the utility model (excluding the reel);

[0023] Figure 3 This is a schematic diagram of the structure of the locking module in the utility model;

[0024] Figure 4 It is a structural front view of the torsion spring in the utility model;

[0025] Figure 5 for Figure 3 A front view of

[0026] Figure 6 for Figure 5 Sectional view at point A;

[0027] Figure 7 for Figure 5 A cross-sectional view of

[0028] Figure 8 It is a schematic diagram of the connection between the output module and the reel in the utility model. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the equipment or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0031] Embodiment 1

[0032] like Figure 1-2 As shown, a motor reverse locking device includes: a driving module 1, an output module 2 and a locking module 3 located between the driving module 1 and the output module 2; when the driving module 1 actively rotates, it drives the output module 2 to rotate synchronously, and when the output module 2 actively rotates, it drives the locking module 3 to lock internally to limit the output module 2 from continuing to rotate.

[0033] As a preference, Figure 3-7As shown, the locking module 3 includes: a base 31, which is fixedly arranged; a torsion spring 32, which is sleeved on the outside of the base 31 and the two are tightly installed, the head and tail ends of the torsion spring 32 separate the circumference of the torsion spring 32, and a rotation interval 301 is formed between the outer sides of the head and tail ends, and a locking interval 302 is formed between the inner sides of the head and tail ends; and a working module 30, when the working module 30 rotates in the rotation interval 301, the torsion spring 32 is forced to expand and rotate synchronously; when the working module 30 rotates in the locking interval 302, the torsion spring 32 is forced to lock and hold the base 31, so that the working module 30 stops rotating.

[0034] It should be noted that when a thrust is applied to the head or tail end of the torsion spring 32 along the circumferential direction within the rotation range 301, the torsion spring 32 will expand outward. When it expands to the point where it is separated from the base 31, the torsion spring 32 can be pushed smoothly, and the locking module 3 fails at this time. When a thrust is applied to the head or tail end of the torsion spring 32 along the circumferential direction within the locking range 302, the torsion spring 32 will shrink inward and become more tightly engaged with the base 31, and the torsion spring 32 cannot be pushed. At this time, the locking module 3 performs the locking function.

[0035] Preferably, the working module 30 includes: a rotating member 33, which is dynamically connected to the driving module 1, and includes a rotating portion 331 located in the rotating interval 301, which can conflict with the head end or the tail end of the torsion spring 32 when rotating forward and reverse; and a locking member 34, which is dynamically connected to the output module 2, and includes a locking portion 341 located in the locking interval 302, which can conflict with the head end or the tail end of the torsion spring 32 when rotating forward and reverse.

[0036] In this embodiment, the motor reverse locking device adopts a purely mechanical structure, by sleeved on the base 31 a torsion spring 32, the head and tail ends of the torsion spring 32 divide its circumference into a rotation zone 301 and a locking zone 302, and a rotating member 33 connected to the driving module 1 and a locking member 34 connected to the output module 2 are provided;

[0037] When the output module 2 drives the locking member 34 to rotate, the locking portion 341 contacts the head end or tail end of the torsion spring 32 in the locking zone 302, so that the torsion spring 32 shrinks inwards and becomes more and more tightly engaged with the base 31 and cannot move, so that the locking member 34 and the output module 2 connected thereto cannot continue to rotate, thus achieving locking;

[0038] When the driving module 1 end drives the rotating member 33 to rotate, the rotating portion 331 contacts the head end or tail end of the torsion spring 32 in the rotating range 301, so that the torsion spring 32 expands outward and is separated from the base 31, and the torsion spring 32 can be pushed smoothly, so that the rotating member 33 and the driving module 1 connected thereto can be driven smoothly, and the power is output to the locking member 34 and the output module 2 end;

[0039] It can be seen that the motor reverse locking device of this embodiment can realize unimpeded free rotation of the rotating part end and rotation and locking of the locking part end, has an ingenious structure, and has a good reverse self-locking effect.

[0040] As a preference, Figure 7 As shown, the lengths of the rotating portion 331 and the locking portion 341 are matched with the axial length of the torsion spring 32 , thereby ensuring that the rotating portion 331 and the locking portion 341 can effectively contact the head and tail ends of the torsion spring 32 .

[0041] As a preference, Figure 3-4 As shown, the torsion spring 32 has a first contact edge 321 and a tail contact edge 322 extending in a radial direction from both ends thereof for contacting the rotating member 33 or the locking member 34 .

[0042] In this embodiment, the torsion spring 32 and the base 31 are tightly mounted at the zero position, and if the torsion spring 32 is pushed from the outside of the two contacting edges of the torsion spring 32 against the friction between the two, the torsion spring 32 will be tightened and thus more tightly held on the base 31; if the torsion spring 32 is pushed from the inside of the two contacting edges of the torsion spring 32 against the friction between the two, the torsion spring 32 will open and thus be loosened from the base 31.

[0043] As a preference, Figure 3 As shown, the driving module 1 is configured as a motor, and the locking module 3 is coaxially sleeved on the motor shaft 11. Figure 6 As shown, the rotating member 33 is fixedly mounted on the motor shaft 11 in the circumferential direction. Figure 1-2 As shown, the base 31 is fixedly connected to the end cover 12 of the motor.

[0044] As a preference, Figure 6 As shown, the rotating portion 331 and the locking portion 341 are both arranged in a fan shape, and a gap is arranged between them and the torsion spring 32 in the radial direction.

[0045] In this embodiment, the rotating portion 331 and the locking portion 341 are both configured to be fan-shaped, so as to be matched and abutted with the first abutting edge 321 and the rear abutting edge 322 , so as to facilitate application of a force along the circumferential direction of the torsion spring 32 .

[0046] As a preference, Figure 1-2As shown, the output module 2 includes: an output module 21, which is dynamically connected to the locking module 3; and a reel 22, which is meshingly connected to the output module 21.

[0047] As a preference, Figure 8 As shown, the output end of the output module 21 is provided with an output tooth 211 , the inner ring of the reel 22 is provided with an inner gear ring 221 , and the output tooth 211 is meshedly connected with the inner gear ring 221 .

[0048] When the motor reversal locking device of this embodiment is actually used, the output module 2 is connected with a load-bearing structure such as a rolling shutter door, so that when the power is on, the driving module 1 (motor) rotates to drive the load to move. When the power is off, if the load end drives the locking member 34 to reverse due to the action of gravity, it can be locked at the moment of reversal to prevent the load from falling and causing danger or damaging the motor, thereby improving safety.

[0049] Embodiment 2

[0050] The components of this embodiment that are the same as or corresponding to those in the above embodiment are marked with the same reference numerals as those in the above embodiment. For the sake of simplicity, only the differences from the above embodiment are described below. The differences between this embodiment and the above embodiment are:

[0051] As a preference, Figure 6 As shown, the rotating member 33 and the torsion spring 32 have clearance fit at both ends; the locking portion 341 and the torsion spring 32 have clearance fit at both ends.

[0052] In this embodiment, a clearance fit is provided between the rotating member 33 and the head and tail ends of the torsion spring 32, and a clearance fit is provided between the locking portion 341 and the head and tail ends of the torsion spring 32, so that there is a small rotation process before the locking and self-locking, thereby preventing instantaneous self-locking braking from reducing the life of the locking structure.

[0053] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A motor reverse locking device, characterized in that: include: A driving module, an output module, and a locking module located between the driving module and the output module; When the driving module actively rotates, the output module is driven to rotate synchronously. When the output module actively rotates, the locking module is driven to lock internally to restrict the output module from continuing to rotate. The locking module comprises: A base, wherein the base is fixedly arranged; A torsion spring, wherein the torsion spring is sleeved outside the base and the two are tightly mounted, the head and tail ends of the torsion spring separate the circumference of the torsion spring, the outer sides of the head and tail ends form a rotation zone, and the inner sides of the head and tail ends form a locking zone; and The working module, when the working module rotates in the rotation range, the friction forces the torsion spring to expand and rotate synchronously; when the working module rotates in the locking range, the friction forces the torsion spring to lock and hold the base tightly, so that the working module stops rotating.

2. The motor reverse locking device according to claim 1, characterized in that: The working module comprises: A rotating member, the rotating member is dynamically connected to the driving module, the rotating member includes a rotating portion located in the rotating range, and can contact the head end or the tail end of the torsion spring when rotating forward or reversely; and A locking member is dynamically connected to the output module, and includes a locking portion located within the locking interval, which can come into contact with the head end or the tail end of the torsion spring when rotating forwards or backwards.

3. The motor reverse locking device according to claim 2, characterized in that: The lengths of the rotating portion and the locking portion are matched with the axial length of the torsion spring, thereby ensuring that the rotating portion and the locking portion can effectively contact the head and tail ends of the torsion spring.

4. The motor reverse locking device according to claim 2, characterized in that: There is a clearance fit between the rotating member and the head and tail ends of the torsion spring; there is a clearance fit between the locking portion and the head and tail ends of the torsion spring.

5. The motor reverse locking device according to claim 2, characterized in that: The first and second ends of the torsion spring extend radially to form a first contact edge and a tail contact edge for contacting the rotating member or the locking member.

6. The motor reverse locking device according to claim 2, characterized in that: The driving module is configured as a motor, the locking module is coaxially sleeved on the motor shaft, the rotating member is circumferentially fixedly mounted on the motor shaft, and the base is fixedly connected to the end cover of the motor.

7. The motor reverse locking device according to claim 2, characterized in that: The rotating part and the locking part are both arranged in a fan shape, and a gap is arranged between them and the torsion spring in the radial direction.

8. A motor reverse locking device according to any one of claims 1 to 7, characterized in that: The output module comprises: an output module, the output module being power-connected to the locking module; and A reel is meshed and transmission-connected with the output module.

9. The motor reverse locking device according to claim 8, characterized in that: The output end of the output module is provided with output teeth, the inner ring of the reel is provided with an inner gear ring, and the output teeth are meshed and connected with the inner gear ring.

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