CN212131116U - Brake device of linear actuator and linear actuator - Google Patents
Brake device of linear actuator and linear actuator Download PDFInfo
- Publication number
- CN212131116U CN212131116U CN202020487346.XU CN202020487346U CN212131116U CN 212131116 U CN212131116 U CN 212131116U CN 202020487346 U CN202020487346 U CN 202020487346U CN 212131116 U CN212131116 U CN 212131116U
- Authority
- CN
- China
- Prior art keywords
- friction
- spring
- motor
- linear actuator
- motor shaft
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 230000001360 synchronised effect Effects 0.000 claims description 2
- 230000017525 heat dissipation Effects 0.000 description 7
- 238000009434 installation Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
Images
Landscapes
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
- Braking Arrangements (AREA)
Abstract
The utility model provides a brake device of a linear actuator, which comprises a one-way bearing (1), a first friction piece (2), a second friction piece (3) and a spring (5), wherein the one-way bearing (1) comprises an inner ring and an outer ring, the inner ring is used for circumferential positioning relative to a motor shaft, the outer ring is circumferential positioning relative to the first friction piece (2) or is integrated with the first friction piece (2), the second friction piece (3) is used for circumferential positioning relative to a motor shell, and is connected or contacted with the spring (5), when the motor shaft rotates forwards, the outer ring of the one-way bearing (1) does not rotate, when the motor shaft rotates backwards, the motor shaft, the inner ring, the outer ring and the first friction piece (2) rotate synchronously, additionally, the utility model also discloses a linear actuator who adopts above-mentioned brake equipment, the utility model has the advantages of, can improve linear actuator's life.
Description
[ technical field ] A method for producing a semiconductor device
The utility model relates to a brake equipment and linear actuator of linear actuator belongs to linear actuating equipment field.
[ background of the invention ]
The linear actuator is widely applied to various fields at present, including electric lifting tables, electric beds, electric sofas and the like, and the structure of the linear actuator generally comprises a driving motor, a rotating lead screw and a transmission nut, wherein the driving motor drives the rotating lead screw to rotate, the transmission nut is driven to axially move when the rotating lead screw rotates, and the transmission nut can be connected with a driving object, so that the driving purpose is realized.
At present, linear actuator's use is more and more extensive, wherein, common linear actuator includes electric putter, common electric putter includes driving motor, brake ring, coil spring and motor shaft, and the brake ring surface cup joints with coil spring, and the internal surface cup joints with the motor shaft, and when the motor shaft corotation, coil spring loosens, and the frictional force between motor shaft and the brake ring is less, and when the motor shaft reversal, coil spring holds tightly, and drives the brake ring internal surface and sticiss the surface of motor shaft to increase the frictional force between motor shaft and the brake ring, realize the auto-lock.
However, the brake ring directly rubs against the motor shaft, and the motor shaft and the brake ring directly have friction force no matter when rotating forward and backward, so that the motor shaft generates more heat, and meanwhile, the brake ring is sleeved on the motor shaft, so that the heat dissipation of the motor shaft is poor, the temperature of the driving motor is high and slow when the driving motor works, and the service life of the linear actuator is further influenced.
[ Utility model ] content
The utility model aims to solve the technical problem that a brake equipment of linear actuator is provided for can improve linear actuator's life.
In order to solve the technical problem, the utility model discloses linear actuator's brake equipment includes one-way bearing, first friction spare, second friction spare and spring, one-way bearing includes inner circle and outer lane, the inner circle is used for fixing a position for motor shaft circumference, the outer lane for first friction spare circumference fixing or with first friction spare structure as an organic whole, the second friction spare is used for fixing a position for motor housing circumference, and with the spring links to each other or contacts, when the motor shaft corotation, one-way bearing's outer lane does not rotate, when the motor shaft reverses, motor shaft, inner circle, outer lane and first friction spare synchronous rotation, the second friction spare contacts under the elastic action of spring first friction spare is with the frictional force that produces.
After the structure is adopted, firstly, the linear actuator comprises a one-way bearing, a first friction piece, a second friction piece and a spring, the one-way bearing comprises an inner ring and an outer ring, when the one-way bearing rotates along one direction, the inner ring can rotate relative to the outer ring, when the one-way bearing rotates along the opposite direction, the inner ring and the outer ring synchronously rotate, the inner ring is used for being circumferentially positioned relative to a motor shaft so that the motor shaft can drive the inner ring to rotate together when rotating, the outer ring is circumferentially positioned relative to the first friction piece or is in an integral structure with the first friction piece so that the outer ring can drive the first friction piece to rotate together when rotating, the second friction piece is used for being circumferentially positioned relative to a motor shell and is connected or contacted with the spring, the spring can be a pressure spring or an extension spring, when the motor shaft rotates forwards, the outer ring of the one, the inner ring of the one-way bearing and the motor shaft rotate together, when the motor shaft rotates reversely, the motor shaft, the inner ring, the outer ring and the first friction piece rotate synchronously, the second friction piece contacts the first friction piece under the elastic action of the spring to generate friction force, self-locking is achieved through the friction force between the first friction piece and the second friction piece, the forward rotation of the motor shaft refers to the rotation direction of the motor shaft when the linear actuator normally extends out, and the reverse rotation of the motor shaft refers to the rotation direction of the motor shaft when the linear actuator contracts for self-locking.
Secondly, in the prior art, no matter when the linear actuator rotates forward and backward, the motor shaft and the brake ring directly have friction, and the brake ring is sleeved on the motor shaft, so that the heat generated by the motor shaft is large, the heat dissipation is poor, and the temperature of the driving motor is high and the heat dissipation is slow when the driving motor operates.
Based on above-mentioned structure, through addding the spring for under the effect of spring force, first friction spare and second friction spare contact increase the normal pressure between first friction spare and the second friction spare, thereby increase the frictional force between first friction spare and the second friction spare, prevent that self-locking ability is not enough to lead to brake equipment to lose efficacy.
Preferably, the brake device further includes a third friction member circumferentially positioned with respect to the motor housing, the third friction member and the second friction member are respectively located on both sides of the first friction member in the axial direction of the motor shaft, and the third friction member contacts the first friction member to generate a friction force when the motor shaft rotates in reverse.
Preferably, a floating gap is present between the first friction member and the third friction member.
Preferably, the spring includes a first spring and a second spring, the first spring and the second spring are respectively in contact with the second friction member and the third friction member, and the third friction member is in contact with the first friction member under the elastic action of the second spring to generate the friction force.
Preferably, the first spring and/or the second spring is a compression spring.
Preferably, the second friction piece and/or the third friction piece are provided with notches in the circumferential direction, the motor housing is provided with protrusions in the circumferential direction, and the second friction piece and/or the third friction piece are circumferentially positioned relative to the motor housing in a manner that the protrusions are engaged with the notches.
Preferably, the cross section of the outer ring in the one-way bearing is non-circular.
Preferably, the one-way bearing has an inner ring fixed to the motor shaft and an outer ring fixed to the first friction member.
The utility model also discloses a linear actuator, including rotating lead screw, worm wheel, motor, shell and brake equipment, the motor includes motor shaft and motor housing, brake equipment adopt as in any one of the above-mentioned scheme brake equipment.
Preferably, the motor housing comprises a motor tailstock and a motor bottom cover, and the motor tailstock and the motor bottom cover are detachably connected.
These features and advantages of the present invention will be disclosed in more detail in the following detailed description and the accompanying drawings.
[ description of the drawings ]
The invention will be described in further detail with reference to the accompanying drawings, in which:
FIG. 1 is a schematic view of a brake apparatus according to the present embodiment;
FIG. 2 is a schematic view of a third friction member and a motor tailstock in the brake apparatus of the embodiment;
FIG. 3 is a schematic view of a first friction element and a one-way bearing of a brake apparatus according to an embodiment of the present invention;
FIG. 4 is a side view of the first friction member of the brake apparatus of the present embodiment;
fig. 5 is a side view of a one-way bearing of a brake apparatus according to the embodiment.
[ detailed description ] embodiments
The technical solutions of the embodiments of the present invention are explained and explained below with reference to the drawings of the embodiments of the present invention, but the embodiments described below are only preferred embodiments of the present invention, and not all embodiments. Based on the embodiments in the embodiment, other embodiments obtained by those skilled in the art without any creative work belong to the protection scope of the present invention.
In the following description, the terms "inside", "outside", "upper", "lower", "left", "right", and the like, which indicate orientations or positional relationships, are used to indicate orientations or positional relationships based on the drawings, and are only used for convenience in describing embodiments and simplifying the description, but do not indicate or imply that the indicated device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
The first embodiment is as follows:
as shown in fig. 1, a preferred structure of the brake device of the linear actuator of the present embodiment includes a one-way bearing 1, a first friction member 2, a second friction member 3 and a spring 5, where the one-way bearing 1 includes an inner ring and an outer ring, the inner ring is used for being positioned circumferentially relative to the motor shaft, the outer ring is positioned circumferentially relative to the first friction member 2 or is an integral structure with the first friction member 2, the second friction member 3 is used for being positioned circumferentially relative to the motor housing and is connected or in contact with the spring 5, when the motor shaft rotates forward, the outer ring of the one-way bearing 1 does not rotate, when the motor shaft rotates backward, the motor shaft, the inner ring, the outer ring and the first friction member 2 rotate synchronously, and the second friction member 3 contacts the first friction member 2 under the elastic action of the spring 5 to generate a friction force.
After the structure is adopted, firstly, the linear actuator comprises a one-way bearing 1, a first friction piece 2, a second friction piece 3 and a spring 5, the one-way bearing 1 comprises an inner ring and an outer ring, when the one-way bearing 1 rotates along one direction, the inner ring can rotate relative to the outer ring, when the one-way bearing 1 rotates along the opposite direction, the inner ring and the outer ring synchronously rotate, the inner ring is used for being circumferentially positioned relative to a motor shaft, so that the motor shaft can drive the inner ring to rotate together when rotating, the outer ring is circumferentially positioned relative to the first friction piece 2 or is in an integral structure with the first friction piece 2, so that the outer ring can drive the first friction piece 2 to rotate together when rotating, the second friction piece 3 is used for being circumferentially positioned relative to a motor shell and is connected or contacted with the spring 5, the spring 5 can be a pressure spring 5, and can also be an extension spring, the outer ring of the one-way bearing 1 does not rotate, namely only the inner ring of the one-way bearing 1 rotates together with the motor shaft, when the motor shaft rotates reversely, the motor shaft, the inner ring, the outer ring and the first friction piece 2 rotate synchronously, the second friction piece 3 contacts the first friction piece 2 under the elastic action of the spring 5 to generate friction force, self-locking is achieved through the friction force between the first friction piece 2 and the second friction piece 3 at the moment, the forward rotation of the motor shaft refers to the rotation direction of the motor shaft when the linear actuator normally extends out, and the reverse rotation of the motor shaft refers to the rotation direction of the motor shaft when the linear actuator contracts for self-locking.
Secondly, in the prior art, no matter when the linear actuator rotates forward and backward, the motor shaft and the brake ring directly have friction, and the brake ring is sleeved on the motor shaft, so that the heat generated by the motor shaft is large, the heat dissipation is poor, and the temperature of the driving motor is high and the heat dissipation is slow when the driving motor operates.
Based on above-mentioned structure, through addding spring 5 for under the effect of spring 5 elasticity, first friction member 2 and the contact of second friction member 3 increase the normal pressure between first friction member 2 and the second friction member 3, thereby increase the frictional force between first friction member 2 and the second friction member 3, prevent that self-locking ability is not enough to lead to brake equipment to lose efficacy.
In order to increase the self-locking capability of the device, the brake device preferably further comprises a third friction member 4, the third friction member 4 is circumferentially positioned relative to the motor housing, the third friction member 4 and the second friction member 3 are respectively located on two sides of the first friction member 2 along the axis direction of the motor shaft, when the motor shaft rotates reversely, the third friction member 4 contacts the first friction member 2 to generate friction force, and the third friction member 4 is additionally arranged, so that the two sides of the first friction member 2 along the axis direction of the first friction member can generate friction force to perform self-locking, and the self-locking capability of the device is increased.
In addition, increase the number of friction member in order to increase the frictional force between first friction member 2 and second friction member 3 and the third friction member 4 to and increase the area of contact of first friction member 2 with second friction member 3 and third friction member 4 all belong to the protection scope of the utility model.
In order to control the magnitude of the self-locking force, in this embodiment, a floating gap is preferably present between the first friction member 2 and the third friction member 4, and the presence of the floating gap enables the friction force between the first friction member 2 and the third friction member 4 to be changed under the influence of the axial force, the axial force in this embodiment may be an elastic force applied by the spring 5, when the axial direction of the first friction member and the third friction member is stressed greatly, the gap between the first friction member 2 and the third friction member 4 is reduced, the contact is tighter, the friction force is larger, and when the axial direction of the first friction member and the third friction member is stressed less, the friction force is smaller, so that the self-locking force can be controlled by controlling the magnitude of the axial force.
For the convenience of installation, it is preferable that the first spring and/or the second spring is a compression spring, that is, one end of the first spring contacts with the motor housing, the other end of the first spring contacts with the second friction member 3, one end of the second spring contacts with the motor housing, and the other end of the second spring contacts with the third friction member 4, when the spring 5 is an extension spring, one end of the spring needs to be connected with the motor housing, and the other end of the spring needs to be connected with the second friction member 3 and/or the third friction member 4, so that the installation is inconvenient.
In order to optimize the structure, as shown in fig. 2 and 4, in this embodiment, it is preferable that the second friction member 3 and/or the third friction member 4 are provided with a notch 8 in the circumferential direction, the motor housing is provided with a protrusion 9 in the circumferential direction, the second friction member 3 and/or the third friction member 4 are circumferentially positioned with respect to the motor housing in a manner that the protrusion 9 is engaged with the notch 8, and by providing the notch 8, the second friction member 3 and the third friction member 4 can be positioned with respect to the motor housing, so that the structure is optimized, the structure of the device is simple, the installation and the processing are more convenient, and meanwhile, the heat dissipation of the second friction member 3 and the third friction member 4 can be accelerated by increasing the notch in the circumferential direction, and the heat dissipation of the device is faster.
In order to further optimize the structure, as shown in fig. 3 and 5, the cross section of the outer ring in the unidirectional bearing 1 is preferably non-circular, the position where the first friction member 2 contacts with the outer ring is matched with the shape of the outer ring, and the first friction member 2 is circumferentially positioned relative to the outer ring through the non-circular shape of the cross section of the outer ring, so that the structure is optimized, the device structure is simple, and the installation and the processing are more convenient.
For further optimization of the structure, the embodiment preferably has the inner ring of the one-way bearing 1 fixed relative to the motor shaft and the outer ring fixed relative to the first friction member 2, so that the second friction member 3 and/or the third friction member 4 can be pressed against the first friction member 2 when contacting the first friction member 2 under the action of the spring 5, thereby increasing the friction force between the first friction member 2 and the second friction member 3 and the third friction member 4.
In order to make the linear actuator more beautiful, in this embodiment, it is preferable that the motor housing includes a motor tailstock 6 and a motor bottom cover 7, the motor tailstock 6 and the motor bottom cover 7 are detachably connected, and the brake device is located between the two, so as to make the linear actuator more beautiful, and the motor tailstock 6 and the motor bottom cover 7 are connected to or in contact with the spring 5, so that the spring 5 can deform to drive the second friction member 3 or/and the third friction member 4 to move.
Example two:
the difference between the present embodiment and the first embodiment is that, in the present embodiment, the spring 5 includes a first spring and a second spring, the first spring and the second spring are respectively in contact with the second friction member 3 and the third friction member 4, and the third friction member 4 is in contact with the first friction member 2 under the elastic action of the second spring to generate a friction force, the structure of the device is further optimized by arranging springs on the second friction member 3 and the third friction member 4, and the second spring on the third friction member 4 has the same action as the first spring on the second friction member 3, which also can achieve the technical effects of the first embodiment.
Example three:
the third embodiment is a linear actuator, the brake device in the first embodiment is used for being installed in the linear actuator in the first embodiment, and the preferred structure of the first embodiment mainly comprises a rotating screw rod, a worm gear, a motor, a shell and the brake device, wherein the motor comprises a motor shaft and a motor shell.
The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and those skilled in the art should understand that the present invention includes but is not limited to the contents described in the drawings and the above specific embodiments. Any modification which does not depart from the functional and structural principles of the present invention is intended to be included within the scope of the claims.
Claims (10)
1. A brake apparatus of a linear actuator, characterized in that: including one-way bearing (1), first friction spare (2), second friction spare (3) and spring (5), one-way bearing (1) includes inner circle and outer lane, the inner circle is used for fixing a position for motor shaft circumference, the outer lane for first friction spare (2) circumference location or with first friction spare (2) structure as an organic whole, second friction spare (3) are used for fixing a position for motor housing circumference, and with spring (5) link to each other or contact, when the motor shaft corotation, the outer lane of one-way bearing (1) does not rotate, when the motor shaft reversal, motor shaft, inner circle, outer lane and first friction spare (2) synchronous rotation, second friction spare (3) contact under the elastic action of spring (5) the frictional force in order to produce of first friction spare (2).
2. A brake apparatus for a linear actuator according to claim 1, wherein: the brake device further comprises a third friction piece (4), the third friction piece (4) is located in the circumferential direction relative to the motor shell, the third friction piece (4) and the second friction piece (3) are located on two sides of the first friction piece (2) respectively along the axis direction of the motor shaft, and when the motor shaft rotates reversely, the third friction piece (4) contacts with the first friction piece (2) to generate friction force.
3. A brake apparatus for a linear actuator according to claim 2, wherein: a floating gap is arranged between the first friction piece (2) and the third friction piece (4).
4. A brake apparatus for a linear actuator according to claim 2, wherein: the spring (5) comprises a first spring and a second spring, the first spring and the second spring are respectively connected or contacted with the second friction piece (3) and the third friction piece (4), and the third friction piece (4) is contacted with the first friction piece (2) under the elastic action of the second spring to generate friction force.
5. The brake apparatus of a linear actuator as claimed in claim 4, wherein: the first spring and/or the second spring are/is a pressure spring.
6. A brake apparatus for a linear actuator according to claim 2, wherein: second friction spare (3) and/or third friction spare (4) are equipped with breach (8) in circumference, motor housing is equipped with arch (9) in circumference, second friction spare (3) and/or third friction spare (4) pass through protruding (9) with the mode of breach (8) looks block is for motor housing realizes circumferential location.
7. A brake apparatus for a linear actuator according to claim 1, wherein: the cross section of the outer ring in the one-way bearing (1) is non-circular.
8. A brake apparatus for a linear actuator according to claim 1, wherein: the inner ring of the one-way bearing (1) is fixed relative to a motor shaft, and the outer ring of the one-way bearing (1) is fixed relative to the first friction piece (2).
9. A linear actuator comprising a rotary screw, a worm gear, a motor, a housing and a brake device, the motor comprising a motor shaft and a motor housing, wherein the brake device is a brake device according to any one of claims 1 to 8.
10. A linear actuator as defined in claim 9, wherein: the motor shell comprises a motor tailstock (6) and a motor bottom cover (7), and the motor tailstock (6) and the motor bottom cover (7) are detachably connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020487346.XU CN212131116U (en) | 2020-04-03 | 2020-04-03 | Brake device of linear actuator and linear actuator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020487346.XU CN212131116U (en) | 2020-04-03 | 2020-04-03 | Brake device of linear actuator and linear actuator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212131116U true CN212131116U (en) | 2020-12-11 |
Family
ID=73686917
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020487346.XU Active CN212131116U (en) | 2020-04-03 | 2020-04-03 | Brake device of linear actuator and linear actuator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212131116U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022267669A1 (en) * | 2021-06-24 | 2022-12-29 | 浙江捷昌线性驱动科技股份有限公司 | Driver having self-locking function, and linear actuator |
| EP4306480A4 (en) * | 2021-07-07 | 2024-10-30 | Zhejiang Jiecang Linear Motion Technology Co., Ltd | SELF-LOCKING MECHANISM, MOTOR AND LINEAR DRIVE |
-
2020
- 2020-04-03 CN CN202020487346.XU patent/CN212131116U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022267669A1 (en) * | 2021-06-24 | 2022-12-29 | 浙江捷昌线性驱动科技股份有限公司 | Driver having self-locking function, and linear actuator |
| US12247646B2 (en) | 2021-06-24 | 2025-03-11 | Zhejiang Jiecang Linear Motion Technology Co., Ltd. | Self-locking drive and linear actuator |
| EP4306480A4 (en) * | 2021-07-07 | 2024-10-30 | Zhejiang Jiecang Linear Motion Technology Co., Ltd | SELF-LOCKING MECHANISM, MOTOR AND LINEAR DRIVE |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2020125095A1 (en) | Robot joint unit with high degree of integrity and high performance | |
| CN212131116U (en) | Brake device of linear actuator and linear actuator | |
| KR101251215B1 (en) | Eddy-current reduction gear | |
| US8528706B2 (en) | Motor with braking mechansim for actuator | |
| KR101212876B1 (en) | Rotational-linear motion converting mechanism and actuator | |
| EP1877677A2 (en) | Harmonic drive linear actuator | |
| CN111342608B (en) | Motor, motor driving system, electric push rod and electric speed reducer | |
| EP4306819A1 (en) | Self-locking device suitable for motor, and linear actuator | |
| JP2012111463A (en) | Steer-by-wire type steering apparatus and vehicle equipped therewith | |
| CN212131121U (en) | Brake device of linear actuator and linear actuator | |
| CN213585435U (en) | Motor and linear actuator with torsional spring self-locking mechanism | |
| CN211715696U (en) | Brake device of linear actuator and linear actuator | |
| CN102537107B (en) | Elastic coupling for motor | |
| CN218761063U (en) | Lead screw subassembly and articulated robot | |
| CN207098851U (en) | The brake device for electrical machinery and electric pushrod of a kind of electric pushrod | |
| CN210536427U (en) | Motor self-locking device of linear actuator and linear actuator | |
| CN210461534U (en) | One-way damper | |
| CN110752706A (en) | A kind of motor self-locking device of linear actuator and linear actuator | |
| CN215942807U (en) | Driving mechanism for electric tool | |
| CN215521717U (en) | Clutch actuator | |
| CN210867413U (en) | Highly-integrated motor | |
| CN211082735U (en) | Screw thread transmission limiting self-locking mechanism | |
| JP2002059388A (en) | Rotary actuator and walking robot with rotary actuator | |
| CN223085832U (en) | Hub assembly and vehicle | |
| CN207648012U (en) | A kind of bidirectional overriding type clutch controlled using electromagnetic attraction |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |