CN219734030U - Braking structure for driving device and driving device - Google Patents

Abstract

The utility model relates to the field of machinery, in particular to a braking structure for a driving device and the driving device. A brake structure for a drive device, comprising: the brake ring comprises at least two brake arc plates, and the at least two brake arc plates are circumferentially arranged on the periphery of the driving shaft; the tension springs are connected end to form a ring shape, the tension springs are arranged on the outer edges of the braking arc plates in a surrounding mode, and the braking arc plates are tightly sleeved on the outer peripheral surface of the driving shaft together; and the rotation stopping piece limits the rotation of the braking arc plate. A driving apparatus comprising: a motor body; a driving shaft penetrating through the center of the motor body; and the rotation stopping piece is fixedly assembled on the motor body, and the braking ring is tightly sleeved on the driving shaft. The technical problems that a braking structure in the prior art is easy to wear to generate gaps after being used for a long time and the braking effect is poor are solved.

Description

Braking structure for driving device and driving device

Technical Field

The utility model relates to the field of machinery, in particular to a braking structure for a driving device and the driving device.

Background

In the prior art, the lifting table is used more and more, and the lifting table can meet the use requirements of users with different heights, so that the users are ensured to be in a comfortable posture in use. Generally, when the height of the lifting table needs to be raised, the driving device can drive the table top to rise; when the tabletop reaches the required height, if the braking structure is not arranged, the tabletop cannot be guaranteed to be always at the height under the action of gravity, the phenomenon that the tabletop descends can occur, the tabletop also acts on the driving device in a counteraction mode, the driving device is damaged, and therefore the driving device is provided with the self-locking device.

A motor with braking function for an actuating device is disclosed as in the application CN201210008317.0, and in particular: a motor with braking function for actuating device includes motor body, rotating shaft, braking mechanism and stop mechanism; the rotating shaft is connected to the center of the motor body in a penetrating way; the braking mechanism comprises a braking ring and a spiral spring, the braking ring is composed of a plurality of arc plates, the spiral spring is wound around the outer edge of each arc plate, and each arc plate is sleeved on the outer periphery of the rotating shaft; the stop mechanism is arranged between the motor body and the braking mechanism and used for limiting the rotation of any arc-shaped plate. Therefore, good braking and decelerating efficiency is achieved.

In the above document, the braking mechanism and the stopper mechanism are disposed on the motor shaft of the actuator, so that a preferable braking effect can be obtained with a small force. However, the arc-shaped plate of the brake ring is contacted with the rotating shaft, and is easy to wear and generate gaps after long-term use, so that the self-locking effect is poor.

Disclosure of Invention

In order to solve the technical problems that a brake structure in the prior art is easy to wear to generate gaps after long-term use and has poor braking effect, the utility model provides a brake structure for a driving device and the driving device, and solves the technical problems.

The technical scheme adopted for solving the technical problems is as follows:

the present utility model provides a brake structure for a driving device, comprising:

the brake ring comprises at least two brake arc plates, and the at least two brake arc plates are circumferentially arranged on the periphery of the driving shaft;

the tension springs are connected end to form a ring shape, the tension springs are arranged on the outer edges of the braking arc plates in a surrounding mode, and the braking arc plates are tightly sleeved on the outer peripheral surface of the driving shaft together;

and the rotation stopping piece limits the rotation of the braking arc plate.

According to one embodiment of the utility model, the outer surface of the braking arc plate is provided with an arc-shaped groove, and the tension spring is positioned at the arc-shaped groove.

A driving apparatus comprising:

a motor body;

a driving shaft penetrating through the center of the motor body;

and the rotation stopping piece is fixedly assembled on the motor body, and the braking ring is tightly sleeved on the driving shaft.

According to one embodiment of the utility model, the braking arc plate and the rotation stopping member are matched with each other through a limiting protrusion and a limiting groove.

According to one embodiment of the utility model, an outer edge is radially extended from one axial end of the braking arc plate, the outer diameter of the outer edge is not smaller than the maximum outer diameter of the tension spring, and the limit protrusions are distributed on the outer edge.

According to one embodiment of the utility model, the braking structure is assembled at a first end of the motor body far away from the driving end of the driving shaft, the rotation stopping piece is an end cover assembled at the first end of the motor body, and a first limit groove is formed in the end cover.

According to one embodiment of the utility model, the braking structure is assembled at a second end of the motor body close to the driving end of the driving shaft, the rotation stopping piece is an end seat assembled at the second end of the motor body, and a second limiting groove is formed on the end seat.

According to one embodiment of the utility model, the rotation stop is a fastener that secures the braking arc.

According to one embodiment of the utility model, the braking structure is fitted inside the motor body, and the fastening means fix the braking arc to the motor body.

According to one embodiment of the utility model, the first end of the motor body is provided with an end seat, a mounting seat extends on the end seat, a worm is formed on the driving end of the driving shaft, a worm wheel is rotatably arranged on the mounting seat, and the worm wheel is meshed with the worm.

Based on the technical scheme, the utility model has the following technical effects:

the braking structure adopts the annular spring ring to be arranged outside the braking ring, so that each braking arc plate of the braking ring can be ensured to be clung to the outer peripheral surface of the driving shaft, and the rotation of the braking arc plate is limited by the rotation stopping piece, so that the braking arc plate can play a role in braking the driving shaft. In long-term use, even if friction between the braking arc plates and the driving shaft is worn, due to inward contraction of the tension springs, the braking arc plates can still be tightly sleeved on the outer peripheral surface of the driving shaft together, and gaps are not generated, so that braking effect is ensured;

2. according to the braking structure, the arc-shaped grooves are formed on the outer surfaces of the braking arc-shaped plates, the tension springs are positioned at the arc-shaped grooves, so that stable acting force of the tension springs on each braking arc-shaped plate can be ensured, the tension springs are not easy to axially move relative to the braking arc-shaped plates, the braking arc-shaped plates are ensured to be positioned in the same circumference, and the tension springs stably press each braking arc-shaped plate inwards;

3. according to the driving device, the braking structure is arranged to act on the driving shaft, so that a stable braking effect can be achieved on the braking shaft, and when the motor body drives the driving shaft to rotate, the driving shaft can work against the braking effect of the braking structure; when the motor body does not work, the driving shaft can be kept still under the braking action of the braking structure, so that locking is realized;

4. according to the driving device, the braking arc plate and the rotation stopping piece are matched through the limiting protrusion and the limiting groove, the rotation stopping piece is fixed on the motor body, and the limiting protrusion is inserted into the limiting groove to play a role in stopping rotation of the braking arc plate; the braking structure can also be arranged at the first end of the motor body, the rotation stopping piece can be an end cover which is additionally arranged, a first limit groove is formed on the end cover, and the first limit groove is in plug-in fit with a limit protrusion on the braking arc plate to play a limit role; the braking structure can be arranged at the second end of the motor body, the end seat at the second end part of the motor body can play the role of a rotation stopping piece at the same time, a second limit groove can be directly formed on the end seat, and the second limit groove is in plug-in connection with the limit protrusion on the braking arc plate to play a limit role. In addition, the rotation stopping piece can be provided with a fastening piece, the fastening piece can fix the braking arc plate, and the rotation of the braking arc plate is limited by adopting a fixed rotation stopping mode; when the rotation stopping piece is a fastening piece, the braking structure can be arranged in the motor body, and the braking arc plate is fixed on the motor body through the fastening piece so that the motor body cannot rotate;

5. according to the driving device, the mounting seat extends from the end seat of the motor body, the driving end of the driving shaft is driven by the worm and the worm wheel, and the worm wheel can be connected with the screw rod linear module to realize telescopic driving.

Drawings

FIG. 1 is a schematic view showing a brake structure mounted on a driving shaft according to a first embodiment of the present utility model;

FIG. 2 is a cross-sectional view of the structure shown in FIG. 1;

FIG. 3 is another angular cross-sectional view of the structure shown in FIG. 1;

FIG. 4 is a schematic view of the brake mechanism assembled to the drive shaft with the rotation stop member omitted;

FIG. 5 is a schematic structural view of a brake ring;

FIG. 6 is a schematic structural view of a rotation stop member according to the first embodiment;

fig. 7 is a schematic structural diagram of a driving device according to the first embodiment;

FIG. 8 is a schematic view of the driving device in another view;

FIG. 9 is a cross-sectional view of the drive device;

fig. 10 is a schematic structural diagram of a driving device according to the second embodiment;

fig. 11 is a sectional view of a driving device of the second embodiment;

FIG. 12 is a schematic view of the structure of the end mount and mounting mount;

FIG. 13 is a schematic view of the structure of FIG. 12 from another perspective;

fig. 14 is a schematic structural view of a driving device according to a third embodiment;

fig. 15 is a sectional view of a driving device of a third embodiment;

fig. 16 is an enlarged view of a portion a of fig. 15;

FIG. 17 is a partial block diagram of the brake structure assembled within the motor body;

in the figure: 1-a brake ring; 11-braking an arc plate; a 111-arc-shaped groove; 112-outer edge; 113-limit protrusions; 2-a tension spring; 3-end caps; 31-a first limit groove; 4-a motor body; 41-a housing; 42-end plates; 43-end seat; 431-a second limit groove; 5-driving shaft; 51-worm; 6, a mounting seat; 7-worm wheel; 8-fasteners.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the utility model, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present utility model. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present utility model unless it is specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.

In the description of the present utility model, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal", and "top, bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, merely to facilitate description of the present utility model and simplify the description, and these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of protection of the present utility model; the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

In addition, the terms "first", "second", etc. are used to define the components, and are only for convenience of distinguishing the corresponding components, and the terms have no special meaning unless otherwise stated, and therefore should not be construed as limiting the scope of the present utility model.

Example 1

As shown in fig. 1 to 9, the present embodiment provides a brake structure for a driving device, which acts on a driving shaft 5 of the driving device, the brake structure including a brake ring 1, a tension spring 2 and a rotation stopper, the brake ring 1 including at least two brake arcuate plates 11, the at least two brake arcuate plates 11 being circumferentially arranged on an outer periphery of the driving shaft 5; the tension springs 2 are connected end to form a ring shape, the tension springs 2 are annularly arranged at the outer edges of the braking arc plates 11, and the braking arc plates 22 are tightly sleeved on the outer peripheral surface of the driving shaft 5; the rotation stop limits the rotation of the brake ring 1.

The brake ring 1 comprises at least two brake arc plates 11, the inner surface of the brake arc plates 11 is an arc surface which can be attached to the driving shaft 5, and the at least two brake arc plates 11 are circumferentially and discretely arranged on the periphery of the driving shaft 5. In the present embodiment, two braking arc plates 11 are provided.

As a preferred technical solution of this embodiment, in order to facilitate the assembly of the tension spring 2, the outer surface of the brake ring 1 is formed with a groove, and the tension spring 2 can be partially embedded in the groove to act on the brake ring 1, so that each brake arc 11 is retracted inwards and tightly sleeved on the driving shaft 5. Specifically, the outer surface of each braking arc plate 11 is formed with arc grooves 111, and when all braking arc plates 11 are circumferentially arranged, all arc grooves 111 can be combined into annular grooves, so that the assembly of the tension spring 2 is facilitated.

As a preferable technical solution of this embodiment, in order to further limit the axial position of the tension spring 2 and prevent the axial deviation thereof, an outer edge 112 is radially extended from one axial end of the braking arc 11, and the outer edge 112 may block the tension spring 2. Preferably, the outer diameter of the outer edge 112 is not smaller than the maximum outer diameter of the tension spring 2.

As a preferred technical scheme of the embodiment, in order to cooperate with the rotation stopping member, the brake arc plate 11 is further extended with a limiting protrusion 113, and the rotation stopping member can be correspondingly provided with a limiting groove, and the limiting protrusion 113 and the limiting groove can be spliced and limited. Preferably, the limit protrusions 113 may be distributed on the outer edge 112, the brake arc 11, the outer edge 112 and the limit protrusions 113 may be integrally provided, and the limit protrusions 113 may extend radially outward from the outer circumferential surface of the outer edge 112. In addition, a limiting groove can be formed on the braking arc-shaped plate 11, and a limiting protrusion is arranged on the rotation stopping piece and is in splicing limiting with the limiting groove.

The tension springs 2 are annular in an end-to-end connection mode, the tension springs 2 can be directly closed annular tension springs or linearly extending tension springs, and two ends of the tension springs are hooked with each other to form an annular shape. The tension spring 2 is annularly arranged at the outer edge of the brake ring 1, and in the initial state, the tension spring 2 is in a stretching state.

The rotation stopping member limits the rotation of the brake ring 1, in this embodiment, the rotation stopping member is set as an end cover 3, the end cover 3 can cover the outside of the brake ring 1 and the tension spring 2, the end cover 3 is fixedly assembled, a first limit groove 31 is formed on the inner circumferential surface of the end cover 3, and a limit protrusion 113 on the brake arc plate 11 extends into the first limit groove 31, so that the rotation stopping effect on the brake arc plate 11 is realized.

The present embodiment also provides a driving device, which includes a motor body 4, a driving shaft 5, and the aforementioned braking structure, wherein the driving shaft 5 is connected to the center of the motor body 4 in a penetrating manner, and the braking structure acts on the driving shaft 5 to provide braking force for the driving shaft 5.

The motor body 4 includes a housing 41, the housing 41 is a cylindrical housing, a first end of the housing 41 is equipped with an end plate 42, a second end of the housing 42 is equipped with an end seat 43, two ends of the driving shaft 5 extend out of the housing 41, one end of the driving shaft 5 extending out of the second end of the housing 42 is a driving end, the driving end of the driving shaft 5 is provided with a worm 51, the worm 51 and the driving shaft 5 can be integrally arranged, and can also be respectively and fixedly connected after being arranged.

The surface of end seat 43 is provided with mount pad 6, rotates on the mount pad 6 and is equipped with worm wheel 7, and worm wheel 7 meshes with worm 51, and worm wheel 7 can connect lead screw straight line module isotructure, specifically, the lead screw is assembled in the center department of worm wheel 7 with changeing, and worm wheel 7 can drive the lead screw and rotate, and then drives the nut on the lead screw and do straight line reciprocating motion. When the table top is applied to the lifting table, the table top can be driven to lift and adjust the height. The end seat 43 and the mounting seat 6 can be integrally arranged, or can be respectively and fixedly connected.

In this embodiment, the braking structure is assembled outside the motor body 4, specifically, the braking structure is disposed near the end plate 42 of the motor body 4, specifically, the outer edge 112 of the braking arc plate 11 may be close to the outer surface of the end plate 42, the tension spring 2 is annularly disposed at the periphery of the braking arc plate 11, the end cover 3 covers the braking ring 1 and the tension spring 2, the opening of the end cover 3 is tightly attached to the end plate 42, the end cover 3 is fixedly connected with the end plate 42, the limiting protrusion 113 extends into the first limiting groove 31, and the braking arc plate 11 cannot rotate along with the driving shaft 5.

Example two

As shown in fig. 10 to 13, the brake structure and the driving device of the present embodiment are basically the same as those of the first embodiment, except that the mounting position of the brake structure of the present embodiment is different from that of the first embodiment, and the structure of the rotation stopper is different from that of the first embodiment.

In this embodiment, the braking structure is assembled near the end seat 43, the end seat 43 functions as a rotation stopping member, specifically, the central hole of the end seat 43 extends axially and outwardly to form a protruding portion, an annular gap is formed between the protruding portion and the driving shaft 5, the braking ring 1 and the tension spring 2 are accommodated in the annular gap, a second limiting groove 431 is formed on the inner surface of the end seat 43, and the limiting protrusion 113 of the braking arc plate 11 can extend into the second limiting groove 431 to limit the braking arc plate 11 to rotate along with the driving shaft 5, and simultaneously prevent the braking ring 1 from being separated from the annular gap.

Example III

As shown in fig. 14 to 17, the brake structure and the driving device of the present embodiment are basically the same as those of the first embodiment, except that the mounting position of the brake structure of the present embodiment is different from that of the first embodiment, and the structure of the rotation stopper is different from that of the first embodiment.

In this embodiment, the braking structure is installed inside the motor body 4, the rotation stopping member is provided as a fastening member 8, and the fastening member 8 fixes the braking arc plate 11 so that it cannot rotate along with the driving shaft 5. Specifically, the braking structure is disposed near the end plate 42, and the limiting protrusion 113 of the braking arc 11 may abut against the inner surface of the end plate 42, and the fastener 8 fixes the limiting protrusion 113 and the end plate 42. In addition to securing the brake arc 11 to the end plate 42, the brake arc 11 may be secured to other structures that do not require rotation, such as securing the brake arc 11 to the end mount 43. Through the arrangement, the braking structure can be arranged in the motor body 4, the integrity of the driving device is good, and the miniaturization of the driving device is facilitated. The fastener 8 is optionally but not limited to a screw.

The embodiments of the present utility model have been described in detail with reference to the drawings, but the present utility model is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the spirit of the present utility model.

Claims (10)

1. A braking structure for a drive device, acting on a drive shaft (5) of the drive device, characterized in that it comprises:

the brake ring (1), the brake ring (1) comprises at least two brake arc plates (11), and the at least two brake arc plates (11) are circumferentially arranged on the periphery of the driving shaft (5);

the tension springs (2) are connected end to form a ring shape, the tension springs (2) are annularly arranged at the outer edges of the braking arc plates (11), and the braking arc plates (11) are tightly sleeved on the outer circumferential surface of the driving shaft (5);

and the rotation stopping piece limits the rotation of the braking arc plate (11).

2. A braking structure for a driving device according to claim 1, characterized in that the outer surface of the braking arc plate (11) is formed with an arc-shaped groove (111), the tension spring (2) being located at the arc-shaped groove (111).

3. A driving device, characterized by comprising:

a motor body (4);

-a drive shaft (5), the drive shaft (5) being threaded in the centre of the motor body (4);

the brake structure according to any one of claims 1-2, said rotation stop being fixedly mounted on said motor body (4), said brake ring (1) being tightly fitted on said drive shaft (5).

4. A driving device according to claim 3, characterized in that the braking arc (11) and the rotation stop member are engaged by means of a limit projection (113) and a limit groove.

5. A driving device according to claim 4, characterized in that an outer edge (112) is radially extended from one axial end of the braking arc plate (11), the outer diameter of the outer edge (112) is not smaller than the maximum outer diameter of the tension spring (2), and the limit protrusions (113) are distributed on the outer edge (112).

6. A drive arrangement according to any one of claims 4-5, characterized in that the braking structure is fitted at a first end of the motor body (4) remote from the drive end of the drive shaft (5), the rotation stop member being an end cap (3) fitted at the first end of the motor body (4), the end cap (3) being formed with a first limit groove (31).

7. A driving device according to any one of claims 4-5, characterized in that the braking structure is fitted at a second end of the motor body (4) near the driving end of the driving shaft (5), the rotation stop member being an end seat (43) fitted at the second end of the motor body (4), the end seat (43) being formed with a second limit groove (431).

8. A driving device according to claim 3, characterized in that the rotation stop is a fastener (8), which fastener (8) secures the braking arc (11).

9. A driving device according to claim 8, characterized in that the braking structure is fitted inside the motor body (4), the fastening means (8) fixing the braking arc (11) to the motor body (4).

10. A driving device according to claim 3, characterized in that the first end of the motor body (4) is provided with an end seat (43), the end seat (43) is provided with a mounting seat (6) in an extending manner, the driving end of the driving shaft (5) is provided with a worm (51), the mounting seat (6) is provided with a worm wheel (7) in a rotating manner, and the worm wheel (7) is meshed with the worm (51).