Electromechanical brake for tongs

Abstract

The application discloses a kind of electromechanical brakes for clamp, including outer shell and the motor assembly being arranged in the one side of outer shell, the end of outer shell away from motor assembly is provided with end cover, the inside of outer shell is provided with brake transmission assembly, the spring brake assembly is provided with by being set in annular groove on outer shell, the spring brake assembly includes electromagnetic brake, several spring groups, piston disc and connecting piece, the electromagnetic brake is set in the one side of outer shell close to motor assembly, the one side of spring group is set in the inside of annular groove of outer shell close to the one side of motor assembly, the piston disc is set in the one end of spring group away from motor assembly, the annular convex ring is set in circular groove on the piston disc, the connecting piece is connected with piston disc.The application is simple in structure, reasonable in design, has higher operation reliability and compact structure, can realize common brake relief, parking brake relief, parking manual relief, gap adjustment, gap initial reset of brake pad.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electromechanical brake, in particular to an electromechanical brake for clamp. BACKGROUND

[0002] With the innovation of industrial control technology and the continuous improvement of overall performance requirements of rail transit, the requirement of electrification of the braking execution unit of the rail vehicle is continuously improved, and intelligentization, networking and light weight have become the development trend. The electrified braking execution unit no longer needs a large number of pipelines and power sources in the hydraulic or pneumatic mode. In the power-off mode or abnormal working condition, in order to meet the needs of vehicle operation, a manual relief device is needed to facilitate manual brake relief.

[0003] Disadvantages of the prior art:

[0004] Currently, two types of wheel brake systems are mainly used in the field of railway locomotives: pneumatic brake system (electro-pneumatic system and vacuum brake can be included in this category) and (electro-) hydraulic brake system. So far, pure electric machine brake system cannot occupy a position worth mentioning in the market. For these two technologies that generate force through the piston in the cylinder, the force generation generally has only one direction of action. The reset of the piston is achieved by the force generated due to the elastic deformation of the brake lever and the reset spring, and in addition, the spring also ensures that it reaches the terminal position. SUMMARY

[0005] The purpose of the present application is to provide an electromechanical brake for clamp to solve the problems raised in the background art.

[0006] To achieve the above purpose, the present application provides the following technical scheme: an electromechanical brake for clamp, comprising a shell body and a motor assembly arranged on one side of the shell body, an end cover is arranged at one end of the shell body away from the motor assembly, a brake transmission assembly is arranged in the shell body, a spring brake assembly is arranged on the shell body by opening an annular groove, and the spring brake assembly comprises:

[0007] An electromagnetic brake is arranged on one side of the shell body close to the motor assembly;

[0008] A plurality of spring groups are arranged on one side of the shell body inside the annular groove close to the motor assembly;

[0009] A piston disc is arranged at one end of the spring group away from the motor assembly, and an annular protruding ring is arranged on the piston disc by opening a circular groove;

[0010] A connecting piece is connected with the piston disc.

[0011] As a further improvement of the present application, the connecting piece comprises:

[0012] A sliding ring is arranged in a circular groove of the piston disc, and an annular groove matching the annular convex ring is arranged on the outer surface of the sliding ring for the sliding ring to follow the piston disc to move;

[0013] A threaded clutch is connected to one end of the sliding ring, and a spline connecting piece is arranged at the other end of the threaded clutch for matching the spline sleeve of the motor assembly.

[0014] As a further improvement of the present application, the transmission assembly comprises:

[0015] A lead screw is connected to the spline connecting piece at one end, and the lead screw passes through the sliding ring, the inner part of the threaded clutch and the through hole of the end cover;

[0016] A ball nut is threadedly connected to the lead screw;

[0017] A connecting sleeve is arranged on the outer surface of the ball nut, the connecting sleeve is slidingly connected to the sliding ring, and the other end of the connecting sleeve is provided with a movable head;

[0018] A relief assembly is arranged on the movable head.

[0019] As a further improvement of the present application, the relief assembly comprises:

[0020] A ratchet wheel is arranged at one end of the lead screw close to the connecting sleeve;

[0021] A pull rod is arranged on the movable head, and a limiting block for locking the ratchet wheel is arranged on the pull rod.

[0022] As a further improvement of the present application, the number of spring groups is at least four, and the spring group comprises an outer spring and an inner spring.

[0023] As a further improvement of the present application, a plurality of positioning columns are arranged on the side surface of the end cover close to the outer shell, the positioning columns are slidingly connected to the through holes on the piston disc and pass through the spring groups.

[0024] As a further improvement of the present application, a limiting ring is arranged on the end cover, and the limiting ring is slidingly connected to the connecting sleeve.

[0025] As a further improvement of the present application, a stepped surface matching the outer shell is arranged on the outer side surface of the sliding ring.

[0026] As a further improvement of the present application, a force sensor for collecting the pushing force of the brake cylinder is arranged in the inner part of the end cover.

[0027] As a further improvement of the present application, the outer shell and the end cover are provided with an accordion cover.

[0028] Compared with the prior art, the present application has the following advantages:

[0029] 1、The spring brake assembly is provided in the present application, the spring brake assembly comprises an electromagnetic brake, a plurality of spring groups, a piston disc and a connecting piece, the connecting piece comprises a sliding ring and a threaded clutch, has high operation reliability and compact structure, and can realize normal brake relief, parking brake relief, parking manual relief, gap adjustment and initial reset of brake pad gap.

[0030] 2、The relief assembly is provided in the present application, the relief assembly comprises a ratchet wheel and a pull rod, a limiting block for locking the ratchet wheel is installed on the pull rod, the relief can be realized in a manual mode, the internal connecting rod mechanism can be operated through a pull rope or a handle, the relief pull rod is pulled to pull the locking compression spring, the parking relief is realized, and the parking function is restored after the next product is powered on. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 It is a perspective view of the present application as a whole;

[0032] Figure 2 It is a schematic view of the overall structure of the present application;

[0033] Figure 3 It is a front view of the present application as a whole;

[0034] Figure 4 It is an installation schematic view of the relief assembly of the present application;

[0035] Figure 5 It is a perspective view of the inside of the outer shell of the present application.

[0036] In the figure: 1, outer shell; 2, motor assembly; 3, end cover; 4, transmission assembly; 41, screw rod; 42, ball nut; 43, connecting sleeve; 44, movable head; 45, relief assembly; 451, ratchet wheel; 452, pull rod; 5, spring brake assembly; 51, electromagnetic brake; 52, spring group; 53, piston disc; 531, annular protruding ring; 54, connecting piece; 541, sliding ring; 542, threaded clutch; 543, spline connecting piece; 6, positioning column; 7, limiting ring; 8, force sensor; 9, accordion cover. DETAILED DESCRIPTION

[0037] In order to make the technical problems, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application and do not limit the present application.

[0038] It should be noted that when an element is referred to as being "fixed", "mounted", "connected" or "set" with another element, it can be directly on the other element or indirectly on the other element. It should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0039] As a further improvement of the present application, the terms "first", "second", "third" and the like are used only for descriptive purposes and cannot be understood as indicating or implying relative importance or implying the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. Embodiments

[0040] Please refer to Figures 1-5 The present application provides a technical solution: an electromechanical brake for a clamp, comprising a shell body 1 and a motor assembly 2 installed on one side of the shell body 1 through bolts, an end cover 3 is installed at the end of the shell body 1 away from the motor assembly 2, a brake transmission assembly 4 is installed inside the shell body 1, a spring brake assembly 5 is installed on the shell body 1 by opening an annular groove, the spring brake assembly 5 comprises an electromagnetic brake 51, a plurality of spring groups 52, a piston disc 53 and a connecting piece 54, the electromagnetic brake 51 is fixedly installed on one side of the shell body 1 close to the motor assembly 2, one side of the spring group 52 is fixed inside the annular groove of the shell body 1 close to the motor assembly 2, the number of spring groups 52 is at least four to ensure sufficient spring force, the spring group 52 comprises an outer spring and an inner spring to further improve the spring force effect of the spring group 52, the piston disc 53 is installed at the end of the spring group 52 away from the motor assembly 2, the piston disc 53 is welded with an annular protruding ring 531 by opening a circular groove, and the connecting piece 54 is connected with the piston disc 53;

[0041] The connecting piece 54 comprises a sliding ring 541 and a threaded clutch 542. The sliding ring 541 is embedded in a circular groove of the piston disc 53. An annular groove is formed on the outer surface of the sliding ring 541 and matches the annular convex ring 531, so that the sliding ring 541 moves with the piston disc 53. A stepped surface is formed on the outer side of the sliding ring 541 and matches the shell 1. One end of the threaded clutch 542 is connected with the sliding ring 541. The other end of the threaded clutch 542 is provided with a spline connecting piece 543 which matches the spline sleeve of the motor assembly 2. In use, the motor assembly 2 loses power, the brake of the motor assembly 2 holds the spline sleeve, the normally open electromagnetic brake 51 loses power, the spring set 52 pushes the piston disc 53, the threaded clutch 542 rotates, the whole forward movement of the lead screw 41 is driven to apply the brake, the spring set 52 is applied to brake, the motor assembly 2 rotates forward, the lead screw 41 rotates backward to reset, and the spring set 52 is reset. After the spring set 52 is reset, the normally open electromagnetic brake 51 is powered, and the spring set 52 is locked.

[0042] The transmission assembly 4 comprises a lead screw 41, a ball nut 42, a connecting sleeve 43 and a relief assembly 45. One end of the lead screw 41 is connected with the spline connecting piece 543. The lead screw 41 passes through the sliding ring 541, the threaded clutch 542 and the through hole of the end cover 3. The lead screw 41 is threadedly connected with the ball nut 42. The connecting sleeve 43 is fixed on the outer surface of the ball nut 42 and is slidingly connected with the sliding ring 541. The other end of the connecting sleeve 43 is provided with a movable head 44. The relief assembly 45 is installed on the movable head 44. When the motor assembly 2 rotates forward, the lead screw 41 is driven to rotate through the spline connecting piece 543, the ball nut 42 is pushed out, the clamp rod applies the brake, the motor assembly 2 is blocked to maintain the brake force value, the force sensor 8 collects the push-out force of the brake cylinder, and the motor assembly 2 reversely rotates to reset the ball nut 42.

[0043] The relief assembly 45 comprises a ratchet wheel 451 and a pull rod 452. The ratchet wheel 451 is fixedly installed on one end of the lead screw 41 close to the connecting sleeve 43. The pull rod 452 is installed on the movable head 44 and is provided with a limiting block for locking the ratchet wheel 451. When the spring set 52 applies the brake or abnormally applies the brake, the vehicle can be towed through mechanical relief to completely relieve the clamp brake force, and the pull rod 452 is pulled through the manual relief box to drive the ratchet wheel 451 to rotate without restriction under the action of the brake force, so that the ball nut 42 rotates to relieve the brake.

[0044] The side of the end cover 3 close to the outer shell 1 is provided with a plurality of positioning columns 6, the positioning columns 6 are in sliding connection with the through holes on the piston disc 53 and pass through the spring set 52, so that the extension direction of the spring set 52 is determined, the linear motion is ensured, the limit ring 7 is installed on the end cover 3, the limit ring 7 is in sliding connection with the connecting sleeve 43, the stability of the connecting sleeve 43 during sliding is increased, the force sensor 8 for collecting the brake cylinder push-out force is installed in the end cover 3, the concertina 9 is connected between the outer shell 1 and the end cover 3, and the dustproof and moisture-proof effects are achieved.

[0045] In the application, the motor assembly 2 rotates forward, the ball screw nut 42 is pushed out through the spline connecting piece 543, the force sensor 8 collects the brake cylinder push-out force after the clamp rod applies the brake, the motor assembly 2 reversely rotates, the ball screw nut 42 is relieved and reset under the driving of the ball screw 41, the motor assembly 2 loses power, the brake of the motor assembly 2 tightly holds the spline sleeve, the normally open electromagnetic brake 51 loses power, the spring set 52 pushes the piston disc 53, the screw clutch 542 rotates, the whole forward movement of the ball screw 41 is pushed to apply the brake, the spring set 52 applies the brake, the motor assembly 2 rotates forward, the ball screw 41 rotates back to reset, and the spring set 52 is reset at the same time, after the spring set 52 is reset, the normally open electromagnetic brake 51 is powered, the spring set 52 is locked, the spring set 52 applies the brake, or abnormally applies the brake, when the vehicle needs to be towed, the clamp brake force can be completely relieved through mechanical relief, the hand relief box is manually relieved, the pull rod 452 is pulled, the ratchet 451 is not limited in rotation, under the action of the brake force, the ball screw nut 42 rotates, and the brake is relieved.

[0046] It should be noted that, in the present document, relational terms such as first and second and the like can be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0047] Although embodiments of the present application have been shown and described, it would be recognized by those of ordinary skill in the art that various changes, modifications, replacements, and alterations of the embodiments could be made without departing from the principles and spirit of the application, and the scope of the application is defined by the appended claims and their equivalents.

Claims

1. An electromechanical brake for a clamp, comprising a housing (1) and a motor assembly (2) arranged on one side of the housing (1), characterized in that: The end cover (3) is arranged at one end of the outer shell (1) away from the motor assembly (2), the inside of the outer shell (1) is provided with a brake transmission assembly (4), the outer shell (1) is provided with a spring brake assembly (5) by opening an annular groove, the spring brake assembly (5) comprises: An electromagnetic brake (51) is arranged on one side of the outer shell (1) close to the motor assembly (2); A plurality of spring groups (52) are arranged on one side of the outer shell (1) inside the annular groove close to the motor assembly (2); A piston disc (53) is arranged at one end of the spring group (52) away from the motor assembly (2), the piston disc (53) is provided with an annular convex ring (531) by opening a circular groove; A connecting piece (54) is connected with the piston disc (53); The connecting piece (54) comprises: A sliding ring (541) is arranged in the circular groove of the piston disc (53), an annular groove matched with the annular convex ring (531) is arranged on the outer surface of the sliding ring (541) for the sliding ring (541) to move with the piston disc (53); A threaded clutch (542) is connected with the sliding ring (541) at one end, and a spline connecting piece (543) matched with the spline sleeve of the motor assembly (2) is arranged at the other end of the threaded clutch (542); the transmission assembly (4) comprises: A lead screw (41) is connected with the spline connecting piece (543) at one end, and passes through the inside of the sliding ring (541), the threaded clutch (542) and the through hole of the end cover (3); A ball nut (42) is threadedly connected with the lead screw (41); A connecting sleeve (43) is arranged on the outer surface of the ball nut (42), the connecting sleeve (43) is slidingly connected with the sliding ring (541), and the other end of the connecting sleeve (43) is provided with a movable head (44); A relief assembly (45) is arranged on the movable head (44).

2. An electromechanical brake for a clamp as defined in claim 1, characterized in that: The relief assembly (45) comprises: A ratchet wheel (451) is arranged at one end of the lead screw (41) close to the connecting sleeve (43); A pull rod (452) is arranged on the movable head (44), and a limiting block for locking the ratchet wheel (451) is arranged on the pull rod (452).

3. An electromechanical brake for a clamp as defined in claim 1, wherein: The number of the spring groups (52) is at least four, and the spring group (52) comprises an outer spring and an inner spring.

4. An electromechanical brake for a clamp as defined in claim 1, wherein: A plurality of positioning columns (6) are arranged on the side surface of the end cover (3) close to the outer shell (1), the positioning columns (6) are slidingly connected with the through holes on the piston disc (53) and pass through the spring groups (52).

5. An electromechanical brake for a clamp as defined in claim 1, wherein: A limiting ring (7) is arranged on the end cover (3), and the limiting ring (7) is slidingly connected with the connecting sleeve (43).

6. An electromechanical brake for a clamp as defined in claim 1, wherein: A stepped surface matched with the outer shell (1) is arranged on the outer side of the sliding ring (541).

7. An electromechanical brake for a clamp as defined in claim 1, wherein: The inside of the end cover (3) is provided with a force sensor (8) for collecting the brake cylinder push-out force.

8. An electromechanical brake for a clamp as defined in claim 1, wherein: The outer shell (1) and the end cover (3) are provided with an accordion cover (9).

Images