Brake end cover structure of servo motor

Abstract

A braking end cover structure of a servo motor is characterized in that the end cover structure is respectively connected with a base and a brake protective cover on two sides, an end cover wire outlet communicated with an inner cavity of the base is radially arranged on the circumferential surface of the end cover structure, the end cover wire outlet is step-shaped, and the inner diameters of steps are gradually reduced from an inlet to an outlet; at least one brake wire outlet communicated with the brake protection cover is axially formed in the end cover wire outlet; a plurality of bosses are arranged on the end face, located on the brake side, of the end cover structure and distributed in an umbrella shape with the axis of the end cover structure as the circle center, and a plurality of protruding blocks and / or cutting grooves used for radially positioning the brake are sequentially arranged on the surface, facing the brake, of each boss in the radial direction of the boss. According to the utility model, through the design of the large-area outgoing line mounting platform, the design of the stepped end cover outgoing line ports and the design of the bumps and / or the cutting grooves on the multilayer brake mounting bosses, the end cover can be adapted to leads, connectors and brakes of different specifications, and the universality requirement of the end cover is met.

Description

TECHNICAL FIELD

[0001] The utility model relates to motor technical field, concretely relates to a brake end cover structure of servo motor. BACKGROUND

[0002] With the diversification of working condition demand, servo motor needs to consider the configuration of different specifications, different brands of brake, the configuration of different specifications, different brands of electrical interface, while ensuring the motor waterproof, dustproof, anti-vibration (electrical protection, mechanical strength) and other needs, and the demand of company material standardization. Therefore, the following problems are derived:

[0003] 1. According to the motor electrical parameters and interface (customer demand), different specifications and shapes of connectors need to be configured, so multiple end covers or transition plates 8 need to be derived for switching (see Figure 2 ), which causes material inconsistency or performance degradation (increased risk of sealing).

[0004] 2. According to the motor braking torque (customer demand), different specifications and brands of brakes need to be configured, and multiple end cover molds are derived due to different installation stops and mounting hole positions, causing material inconsistency or excessive machining allowance. The flange surface of the brake is in full contact with the end cover, and the heat generated by emergency braking can be quickly transmitted to the bearing, which may adversely affect the bearing life.

[0005] 3. Due to customer electrical interface definition requirements, the main power cable and the brake cable are defined on the same electrical connector, the motor stator lamination outer diameter is smaller than the brake outer diameter, and the lead wire is difficult to lead from the large outer diameter to the small outer diameter position (see Figure 1 , Figure 2 ), unless external wiring, but this brings new problems in protection, and needs to be worn out from the end cover and then inserted from the machine base, which brings protection problems and inconvenient operation process; or from small inner diameter to large inner diameter, but the main power cable current is large, the wire diameter is large, the brake side has brake dust, the brake flange plate is easy to heat, and there are dust protection, lead current reduction (due to heating), process operation and other difficulties.

[0006] Therefore, how to solve the above problems in the prior art has become the research and solution of the utility model. UTILITY MODEL CONTENT

[0007] The utility model aims at providing a brake end cover structure of servo motor.

[0008] To achieve the above purpose, the utility model adopts the technical scheme of:

[0009] The brake end cover structure of a servo motor is connected with the motor base and the brake protector cover on both sides, a radial end cover outlet is arranged on the circumferential surface of the end cover structure and communicated with the inner cavity of the motor base, the end cover outlet is in a stepped shape and the inner diameter of each step is gradually reduced from the inlet to the outlet, and at least one axial brake outlet is arranged in the end cover outlet and communicated with the brake protector cover.

[0010] The radial end cover outlet is arranged on the end cover structure, the axial brake outlet is arranged in the end cover outlet, the electrical connection problem of the small stator outer diameter and the large brake outer diameter can be solved. The stepped end cover outlet can be used for passing through the lead wires of different specifications and can be connected with the plug-in connectors of different specifications.

[0011] A plurality of bosses are arranged on one end surface of the end cover structure on the brake side, the bosses are distributed in an umbrella shape with the axis of the end cover structure as the center, a plurality of protrusions and / or cut grooves for radially positioning the brake are arranged on the surface of each boss facing the brake in sequence along the radial direction of the boss, the vertical surface of the protrusion and / or cut groove is matched with the recessed and protruding portion of the flange edge of the brake, and the plane on the radial inner side of the protrusion and / or cut groove is in contact with the flange of the brake.

[0012] Through the arrangement of the bosses, the contact area between the brake flange and the end cover structure is reduced, the thermal resistance is increased, the heat generated by frequent braking can be effectively prevented from being directly transmitted to the bearing, and the service life of the bearing is improved.

[0013] The protrusions and / or cut grooves are arranged on the bosses, and the radially positioning installation of the brakes of different specifications is applicable.

[0014] Preferably, the end cover outlet has at least two annular step surfaces, the tread surface of the annular step surface is a chamfered surface with a rounded corner, the rounded corner of the wire inlet portion is smooth, the lead wire insulation of the plug-in connectors of different specifications can be reliably protected, and the electrical failure caused by the long-term wear of the lead wire insulation is avoided.

[0015] Preferably, a sealing ring is fixedly arranged in the brake outlet, the brake and the main stator winding of the servo motor can be isolated, and the service life of the winding insulation is not affected by dust.

[0016] Preferably, when the surface of each boss facing the brake is provided with a plurality of protrusions and cut grooves for radially positioning the brake in sequence along the radial direction of the boss, the protrusions are arranged at the outer end of the boss, and the cut grooves are arranged at the middle and inner end of the boss. The outer boss is used for radially positioning the larger brake, the inner boss is used for positioning the smaller brake, and the cut groove is directly machined on the plane for the smaller brake.

[0017] Further preferably, the outer end of the boss extends towards the circumference with the shaft center as the center to form an arc-shaped widened portion, and the protruding block extends towards the circumference with the shaft center as the center to the arc-shaped widened portion.

[0018] Further preferably, the plurality of cut grooves are in a stepped shape, and the thickness of the boss at the plurality of cut grooves increases step by step from the inner end to the outer end in the radial direction, which can be suitable for installation of brake of various specifications.

[0019] Preferably, the mounting screw hole on the end cover structure connected with the brake is arranged on the boss, and a plurality of end cover reinforcing ribs are arranged on the other end face of the end cover structure and correspond to the mounting screw hole.

[0020] Preferably, a wire outlet mounting platform for fixing a plug-in connector is arranged on the circumferential surface of the end cover structure corresponding to the end cover wire outlet, and the area of the wire outlet mounting platform is as large as possible to adapt to plug-in connectors of different specifications.

[0021] The working principle and advantages of the utility model are as follows:

[0022] The utility model discloses a large-area wire outlet mounting platform design, a stepped end cover wire outlet design, a plurality of layers of brake installation boss protruding block and / or cut groove design, which can be suitable for lead, plug-in connector and brake of different specifications, and can effectively solve the problems of large machining allowance and non-universal end cover blank, and meet the universality requirement of the end cover.

[0023] The utility model discloses that the boss contacts the brake flange, the contact area of brake flange and end cover structure is small, heat resistance is increased, and the heat generated by frequent braking can be effectively avoided to be directly transmitted to the bearing, and the service life of the bearing is improved.

[0024] The utility model discloses that the radial end cover wire outlet is additionally arranged on the end cover structure, and the axial brake wire outlet is arranged in the end cover wire outlet, which can realize the electrical connection of small stator outer diameter and large brake outer diameter.

[0025] The utility model discloses that the brake is isolated from the main stator winding by the sealing ring in the brake wire outlet, and the insulation life of the winding is not affected by dust.

[0026] The end cover wire outlet of the utility model is a stepped wire outlet with a fillet bevel, which can realize smooth fillet of the wire inlet part after processing, can reliably protect the lead insulation of plug-in connectors of different specifications, and avoids electrical failure caused by long-term wear of lead insulation. DRAWINGS

[0027] ATTACHMENT Figure 1This is an assembly drawing of the motor structure of this utility model;

[0028] Appendix Figure 2 This is the original pitch motor structure assembly drawing;

[0029] Appendix Figure 3 This is a right-hand isometric view of the end cap blank of this utility model;

[0030] Appendix Figure 4 This is a left-hand isometric view of the end cap blank of this utility model;

[0031] Appendix Figure 5 This is a top view of the wire outlet of the end cap blank of this utility model;

[0032] Appendix Figure 6 This is a cross-sectional view of the wire outlet of the end cap blank of this utility model;

[0033] Appendix Figure 7 This is a cross-sectional view of the small-diameter outlet of the end cap blank of this utility model.

[0034] Appendix Figure 8 Cross-sectional view of the large-diameter outlet of the end cap blank of this utility model;

[0035] Appendix Figure 9 This is a right view of the end cap structure when the brake of this utility model is engaged with the outermost protrusion;

[0036] Appendix Figure 10 This utility model Figure 9 Cross-sectional view at point AA;

[0037] Appendix Figure 11 This is a right axonometric view of the brake of this utility model when it is engaged with the outer protrusion;

[0038] Appendix Figure 12 This is a right axonometric view of the brake of this utility model when it is engaged with the inner protrusion;

[0039] Appendix Figure 13 This is a right axonometric view of the brake of this utility model when it is engaged with the groove.

[0040] In the attached diagrams above:

[0041] 1. End cap structure;

[0042] 2 bases;

[0043] 3. Brake protective cover;

[0044] 4. Brakes;

[0045] 5. Brake auxiliary lines;

[0046] 6. Main power lines;

[0047] 7 connectors;

[0048] 8 transition plate;

[0049] 11 end cover outlet port;

[0050] 111 annular stepped surface;

[0051] 12 brake outlet port;

[0052] 13 sealing ring;

[0053] 14 boss;

[0054] 15 convex ring;

[0055] 16 convex block;

[0056] 17 cutting groove;

[0057] 18 mounting screw hole;

[0058] 19 end cover reinforcing rib;

[0059] 20 arc-shaped widened portion;

[0060] 21 outlet mounting platform. DETAILED DESCRIPTION

[0061] The utility model will be further described below in combination with the drawings and examples:

[0062] Examples: the present application will be clearly explained below by means of drawings and detailed description, and any person skilled in the art can change and modify the technology taught by the present application after understanding the examples of the present application, which does not deviate from the spirit and scope of the present application.

[0063] The terms used herein are only for describing specific examples and are not intended to limit the present application. The singular forms "a", "this", "this", "this" and "the" as used herein also include the plural forms.

[0064] As used herein, "connected" or "positioned" can mean that two or more components or devices are in direct physical contact with each other or are indirectly in physical contact with each other, or can mean that two or more components or devices are in operation or action with each other.

[0065] As used herein, "include", "include", "have" and the like are open terms, that is, they mean to include but not limited to.

[0066] Referring to the accompanying Figures 1-13 The utility model provides a kind of brake end cover structure of servo motor, and the end cover structure 1 is connected with the machine stand 2 and brake protector 3 of both sides respectively by screw.

[0067] The end cover structure 1 is radially provided with an end cover outlet 11 communicated with the inner cavity of the base 2, the end cover outlet 11 is stepped and the inner diameter of each step is gradually reduced from the inlet to the outlet; the end cover outlet 11 has at least two annular step surfaces 111.

[0068] The minimum diameter of the end cover outlet 11 (i.e. the diameter of the annular step surface 111 at the outlet of the end cover outlet 11) is designed according to the minimum outlet, which is suitable for connecting the lead through of the plug-in connector 7 of different specifications; when the minimum diameter cannot pass the lead, the hole can be expanded from the diameter that can pass the lead to the small diameter, that is, the hole is vertically expanded along the vertical surface of the step, see Figures 3-6 .

[0069] The tread of the annular step surface 111 is a chamfered surface with a rounded corner, so that the rounded corner of the lead-in part is smooth, which can reliably protect the insulation of the lead of the plug-in connector 7 of different specifications, and avoid electrical failure caused by long-term wear of the lead insulation, see Figures 4-5 .

[0070] At least one brake outlet 12 communicated with the brake protector cover 3 is axially provided in the end cover outlet 11, in the embodiment, two brake outlets 12 are provided, one large and one small. The auxiliary line 5 of the brake 4 can axially pass through the brake outlet 12 to enter the end cover outlet 11 and combine with the main power line 6 of the motor, which can realize the electrical connection of the small stator outer diameter and the large brake 4 outer diameter.

[0071] The sealing ring 13 is fixedly arranged in the brake outlet 12, which can isolate the brake 4 from the main stator winding of the servo motor, and ensure that the insulation life of the winding is not affected by dust. The sealing ring 13 has sealing heads at both ends to limit the axial movement of the sealing ring 13 along the brake outlet 12. The outer wall of the sealing ring 13 is uniformly provided with a sealing ring along the length direction, and the sealing ring is in interference fit with the brake outlet 12.

[0072] The end cover structure 1 is provided with a plurality of bosses 14 on one end surface of the brake 4, and the bosses 14 are distributed in an umbrella shape with the axis of the end cover structure 1 as the center. Each boss 14 is connected with a lug 15 at the axis, the lug 15 is sleeved on the outside of the motor shaft, and the lug 15 and the boss 14 are integrally formed with the end cover structure 1. In order to strengthen the strength of the boss 14, the middle parts of the bosses are further connected by a reinforcing ring.

[0073] The surface of each boss 14 facing the brake 4 is sequentially provided with a plurality of convex blocks 16 and / or cut grooves 17 for radially positioning the brake 4 along the radial direction, the vertical surface of the convex block 16 and / or the cut groove 17 is in concave-convex fit with the stopper of the flange edge of the brake 4, and the plane of the inner side of the convex block 16 and / or the cut groove 17 is in contact with the flange of the brake 4.

[0074] In this embodiment, the surface of each boss 14 facing the brake 4 is provided with a plurality of protrusions 16 and grooves 17 for radial positioning of the brake 4 along the radial direction thereof. The number and position of the protrusions 16 and grooves 17 can be set according to the specifications of the brake 4 commonly available on the market. The protrusions 16 are arranged at the outer end of the boss 14, and the grooves 17 are arranged at the middle and inner end of the boss 14. In this way, the protrusions 16 and grooves 17 do not interfere with each other and can be used to position different specifications of the brake 4.

[0075] During installation, larger brakes 4 are positioned radially using the outer bosses 14, as shown in Figures 9-11 ; smaller brakes 4 are positioned using the inner bosses 14, as shown in Figure 12 ; and even smaller brakes 4 have the grooves 17 machined directly on the flat surface, as shown in Figure 13 . Among them, Figure 9 , Figure 11 , Figure 12 , Figure 13 The shaded part in

[0076] In other embodiments, the surface of each boss 14 facing the brake 4 can be provided with a plurality of protrusions 16 for radial positioning of the brake 4 along the radial direction thereof. When the brake 4 is fitted with one of the protrusions 16, the other protrusions 16 inside the fitted protrusion 16 are removed to avoid affecting the contact between the flange of the brake 4 and the flat surface inside the fitted protrusion 16. When installing a smaller brake 4, a groove 17 can be temporarily machined on the middle or inner end of the surface of the boss 14.

[0077] In other embodiments, the surface of each boss 14 facing the brake 4 can also be provided with a plurality of grooves 17 for radial positioning of the brake 4 along the radial direction thereof. When installing the brake 4, the grooves 17 are temporarily machined according to the specifications of the brake 4.

[0078] The flange of the brake 4 contacts the plurality of bosses 14 on the end cover structure 1, and the contact area is reduced, increasing the thermal resistance, which can effectively prevent the heat generated by frequent braking from being directly transmitted to the bearing, thereby improving the service life of the bearing. By providing a plurality of protrusions 16 and / or grooves 17 on the boss 14, different specifications of the brake 4 can be positioned and installed radially.

[0079] To increase the strength of the protrusions 16, the outer end of the boss 14 extends circumferentially around the shaft center to form an arc-shaped widened portion 20, and the protrusions 16 extend circumferentially around the shaft center to the arc-shaped widened portion 20.

[0080] Some of the said cutting groove 17 is ladder, and some of the cutting groove 17 said boss 14 thickness from the boss 14 radial end to the outer end of the step by step, can be used for a variety of specifications of the brake 4 installation. Although it will make smaller brake 4 corresponding to the boss 14 thickness thinner, but because the brake 4 is small, so also do not affect the end cover service life.

[0081] Referring to the drawings Figures 9-13 , the brake 4 is connected with the end cover structure 1 through flange and screw, and the end cover structure 1 is provided with mounting screw hole 18 capable of cooperating with screw, which is arranged on the boss 14, and the other end face of the end cover structure 1 is provided with a plurality of end cover reinforcing ribs 19 corresponding to the mounting screw hole 18, which can strengthen the strength of the end cover structure 1 and the boss 14 after the mounting screw hole 18 is arranged.

[0082] The peripheral surface of the end cover structure 1 corresponding to the end cover outlet 11 is provided with a wire outlet mounting platform 21 for fixing the plug-in part 7, and the area of the wire outlet mounting platform 21 needs to be as large as possible. The installation area required by different specifications of the plug-in part 7 is different, so the larger wire outlet mounting platform 21 can adapt to different specifications of the plug-in part 7. The plug-in part 7 is fixed with the wire outlet mounting platform 21 through mounting screw, and the installation screw length required by different specifications of the plug-in part 7 is different, so the depth of the end cover outlet 11 needs to ensure the maximum installation depth of the installation screw, and also ensure the air tightness.

[0083] The wiring method of the servo motor using the above brake end cover structure 1 comprises:

[0084] An end cover blank is prepared, which has a radial end cover wire outlet 11 with ladder shape on the peripheral surface, and the inner diameter of each step of the ladder-shaped end cover wire outlet 11 is gradually reduced from the inlet to the outlet; a plurality of bosses 14 are integrally formed on one end face of the end cover blank, and the plurality of bosses 14 are distributed in an umbrella shape with the axis of the end cover structure 1 as the center; a plurality of bosses 14 are integrally formed on the surface of each boss 14 along the radial direction, which are used for radial positioning of the brake 4, see Figures 9-11 ;

[0085] According to the wire diameter of the main power line 6 of the servo motor and the auxiliary line 5 of the brake, the ladder-shaped end cover wire outlet 11 is axially expanded to an adaptive aperture capable of accommodating the main power line 6 and the auxiliary line 5 of the brake, specifically, the hole is expanded in the direction of small aperture; the brake wire outlet 12 capable of accommodating the auxiliary line 5 of the brake is axially arranged on the hole wall of the expanded end cover wire outlet 11;

[0086] The main power line 6 is introduced into the end cover outlet 11, the brake auxiliary line 5 is introduced into the end cover outlet 11 through the brake outlet 12 on the end face of the end cover structure 1, the main power line 6 and the brake auxiliary line 5 are connected with the external plug-in connector 7, and the plug-in connector 7 is fixedly installed on the outlet installation platform 21 of the end cover structure 1 through the mounting screw.

[0087] The installation method of the servo motor using the above brake end cover structure 1 comprises the following steps:

[0088] According to the outer diameter of the flange stop of the selected brake 4, the protrusions 16 on the end cover structure 1 are processed, and the processing method is as follows: when the stop is matched with one of the protrusions 16, the other protrusions 16 inside the protrusion 16 are removed, as shown in Figure 11 ; when the stop is not matched with any of the protrusions 16, a groove 17 matched with the stop is processed on the surface of the boss 14, as shown in Figure 13 ;

[0089] After the stator and the rotor are assembled, the processed end cover structure 1 is sleeved on the shaft hole, and is fixed on the machine base 2 by screws; the brake 4 is positioned radially inside the protrusion 16 or the groove 17, and the flange of the brake 4 is in contact with the plane inside the protrusion 16 or the groove 17, as shown in the shadow part of Figure 9 、 Figure 11 、 Figure 12 、 Figure 13 ;

[0090] The brake and the flange, the brake protection cover 3 and the end cover structure 1 are sequentially fixed by screws.

[0091] In other embodiments, the groove 17 matched with the commonly used brake 4 on the market can also be pre-processed on the end cover blank, and for the installation of the brake 4 not commonly used, the groove 17 matched with the brake 4 can be processed on site, as shown in Figure 13 .

[0092] The above embodiments are only for illustrating the technical concept and characteristics of the utility model, and the purpose is to enable persons skilled in the art to understand the content of the utility model and implement it, and cannot limit the protection scope of the utility model. Any equivalent changes or modifications made according to the spirit and essence of the utility model shall be covered within the protection scope of the utility model.

Claims

1. A brake end cover structure of a servo motor, the end cover structure being connected with a motor base and a brake protector cover on two sides, characterized in that: a radial end cover outlet port is formed on a circumferential surface of the end cover structure and is communicated with an inner cavity of the motor base, the end cover outlet port is stepped and the inner diameter of each step is gradually reduced from the inlet to the outlet, and at least one brake outlet port is formed axially in the end cover outlet port and is communicated with the brake protector cover; a plurality of bosses are arranged on an end surface of the end cover structure on the brake side, the bosses are distributed in an umbrella shape with the shaft center of the end cover structure as the center, and a plurality of convex blocks and / or cutting grooves for radially positioning the brake are arranged on the surface of each boss facing the brake in sequence along the radial direction of the boss, the vertical surface of the convex block and / or the cutting groove is matched with the concave-convex portion of the stopper of the flange edge of the brake, and the plane on the radial inner side of the convex block and / or the cutting groove is in contact with the flange of the brake. The end cover outlet port has at least two annular step surfaces, and the tread of the annular step surface is a chamfered surface with a rounded corner. A sealing ring is fixedly arranged in the brake outlet port.

2. The brake end bell structure of a servo motor according to claim 1, characterized in that: When the surface of each boss facing the brake is provided with a plurality of convex blocks and cutting grooves for radially positioning the brake in sequence along the radial direction of the boss, the convex blocks are arranged at the outer end of the boss, and the cutting grooves are arranged at the middle and inner end of the boss.

3. The brake end bell structure of a servo motor according to claim 1, wherein: The outer end of the boss extends towards the circumferential direction with the shaft center as the center to form an arc-shaped widened portion, and the convex blocks extend towards the circumferential direction to the arc-shaped widened portion with the shaft center as the center.

4. The brake end bell structure of a servo motor according to claim 1, wherein: The plurality of cutting grooves are stepped, and the thickness of the boss at the plurality of cutting grooves is gradually increased from the inner end to the outer end of the boss in sequence.

5. The brake end cap structure of a servo motor according to claim 1 or 4, characterized in that: The mounting screw holes on the end cover structure connected with the brake are arranged on the boss, and a plurality of end cover reinforcing ribs are arranged on the other end surface of the end cover structure corresponding to the mounting screw holes.

6. The brake end cap structure of a servo motor according to claim 1 or 4, characterized by: An outlet mounting platform for fixing a plug-in part is arranged on the circumferential surface of the end cover structure corresponding to the end cover outlet port.

7. The brake end bell structure of a servo motor according to claim 1, wherein: ​ 8. The brake end bell structure of a servo motor according to claim 1, wherein: ​

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