Rear support assembly with corn shield

Abstract

The utility model provides a rear support assembly with an eyelet shield, which structurally comprises a rear support, copper eyelets are clamped on the front side and the rear side of the bottom of the rear support; the outer side of the rubber eyelet shield is connected with the middle of the copper eyelet in a sleeved mode, a first plug and a second plug are fixedly arranged at the rear end and the middle of the rubber eyelet shield respectively, and the opposite sides of the first plug and the second plug are close to the front side and the rear side of the copper eyelet respectively. The carbon powder spacer bush blocks carbon powder accumulation at the bottom of the bakelite carbon brush box and the bottom of the rear support, formation of a pressure-resistant passage is avoided, and the rubber eyelet shield covers the exposed metal part of the copper eyelet, so that the pressure-resistant passage between the carbon brush in the bakelite carbon brush box and the copper eyelet can be avoided even if the outside of the copper eyelet is in butt joint with a part of carbon powder, and the pressure resistance of the carbon brush is improved. The technical problem that a carbon brush of an existing motor rear support and a metal part at the position of a corn form a voltage-withstanding channel is solved.

Description

Technical Field

[0001] The utility model mainly relates to the technical field of motor rear brackets, and in particular to a rear bracket component with an eyelet guard. Background Art

[0002] After the motor is used for a long time, a lot of carbon powder will appear at the carbon brush. In order to avoid the formation of a conductive path due to the accumulation of carbon powder at the carbon brush of the motor, which may lead to voltage breakdown, a carbon powder isolation sleeve will be provided at the carbon brush. Even if the motor has a carbon powder spacer to isolate the carbon powder, a carbon powder path will still be formed between the carbon brush and the eyelet, resulting in voltage breakdown.

[0003] The inventor proposes a rear bracket assembly with an eyelet guard, which adds a passport structure to the eyelet position and is made of silicone rubber to cover the exposed metal part of the eyelet position to avoid forming a pressure-resistant path between the metal part of the eyelet position and the carbon brush. Utility Model Content

[0004] 1. Technical problems solved by the utility model:

[0005] The utility model provides a rear bracket component with an eyelet guard, which solves the technical problem that a pressure-resistant passage is formed between a carbon brush of an existing motor rear bracket and a metal part at the eyelet.

[0006] 2. Technical solution:

[0007] In order to achieve the above-mentioned purpose, the technical solution provided by the utility model is: a rear bracket assembly with an eyelet guard, comprising the following structure:

[0008] A rear bracket, wherein the left and right sides of the middle of the rear bracket are clamped with bakelite carbon brush boxes, the opposite sides of the two bakelite carbon brush boxes are clamped with carbon powder spacers, and the left and right sides of the bottom of the rear bracket are clamped with copper eyelets.

[0009] A rubber eyelet shield, the outer side of which is sleeved with the middle part of the copper eyelet, a first plug and a second plug are respectively fixed to the right end and the middle part of the rubber eyelet shield, and the opposite sides of the first plug and the second plug are respectively close to the left and right sides of the copper eyelet.

[0010] Furthermore, a bearing is movably connected to the middle of the top end of the rear bracket, and a metal bearing pressure plate is fixed to the top of the inner wall of the rear bracket, and the top of the metal bearing pressure plate is movably connected to the bottom of the bearing.

[0011] Furthermore, a plurality of isolation sheets are fixedly provided on opposite sides of the two carbon powder spacers, and the isolation sheets are located on the inner side of the rear bracket and the outer side of the connection between the carbon powder spacers to separate the inner side of the rear bracket from the bakelite carbon brush box, and discontinuous grooves are formed between adjacent isolation sheets.

[0012] Furthermore, a plurality of isolation grooves are fixedly provided on opposite sides of the two carbon powder spacers along the radial direction of the carbon brush holes, and the isolation grooves are located on the inner side of the rear bracket and the outer side of the connection between the carbon powder spacers to separate the inner side of the rear bracket from the bakelite carbon brush box.

[0013] Furthermore, an air duct is clamped on the front and rear sides of the top of the rear bracket, and an air inlet and an air outlet are respectively fixed on the bottom and top of the air duct. The air inlet is close to the middle of the bottom end of the rear bracket, and the air outlet extends to the middle of the top end of the rear bracket.

[0014] Furthermore, a shaft rod is movably connected to the middle part of the rear bracket, the outer side of the shaft rod is sleeved with the middle part of the bearing, and a heat dissipation fan blade is fixedly provided on the top of the shaft rod.

[0015] 3. Beneficial effects:

[0016] Compared with the prior art, the technical solution provided by the utility model has the following beneficial effects:

[0017] The utility model provides a rear bracket assembly with an eyelet shield, a design of an isolation sheet and an intermittent groove, a carbon powder spacer is used to block carbon powder accumulation at the bottom of a bakelite carbon brush box and a rear bracket, and avoid the formation of a pressure-resistant passage; the rubber eyelet shield covers the exposed metal part of the copper eyelet, so that even if there is some carbon powder connected to the outside of the copper eyelet, a pressure-resistant passage between the carbon brush in the bakelite carbon brush box and the copper eyelet can be avoided;

[0018] The parts not involved in the device are the same as those in the prior art or can be implemented by using the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional diagram of the structure of the utility model;

[0020] Figure 2 It is a three-dimensional diagram of the rear support structure of the utility model;

[0021] Figure 3 It is a half-cut stereoscopic diagram of the isolation plate structure of the utility model;

[0022] Figure 4 It is a half-section stereogram of the isolation slot structure of the utility model;

[0023] Figure 5 It is a half-section stereoscopic view of the rear support structure of the utility model;

[0024] Figure 6 It is a stereoscopic diagram of the air duct structure of the utility model.

[0025] Reference numerals:

[0026] Rear bracket - 1;

[0027] Bakelite carbon brush box-2;

[0028] Carbon powder spacer-3; spacer-31; intermittent groove-32; isolation groove-33;

[0029] Copper eyelets - 4;

[0030] Rubber eyelet guard-5; first plug-51; second plug-52;

[0031] Air duct-6; air inlet-61; air outlet-62;

[0032] Axle-7;

[0033] Cooling fan blades - 8. DETAILED DESCRIPTION

[0034] To facilitate the understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings. Several embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0035] It should be noted that when an element is referred to as being "fixed on" another element, it may be directly on the other element or there may also be a central element; when an element is considered to be "connected to" another element, it may be directly connected to the other element or there may also be a central element; the terms "vertical", "horizontal", "left", "right" and similar expressions used in this article are for illustrative purposes only.

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field of the present invention; the terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention; the term "and / or" used herein includes any and all combinations of one or more related listed items.

[0037] Refer to the attached Figure 1-6 The utility model provides a rear bracket assembly with an eyelet guard, comprising the following structure:

[0038] The rear bracket 1 has bakelite carbon brush boxes 2 clamped on the left and right sides of the middle of the rear bracket 1, carbon powder spacers 3 clamped on the opposite sides of the two bakelite carbon brush boxes 2, and copper eyelets 4 clamped on the left and right sides of the bottom of the rear bracket 1.

[0039] The rubber eyelet shield 5 has its outer side sleeved with the middle of the copper eyelet 4, and the right end and the middle of the rubber eyelet shield 5 are respectively fixed with a first plug 51 and a second plug 52, and the opposite sides of the first plug 51 and the second plug 52 are respectively close to the left and right sides of the copper eyelet 4.

[0040] In this embodiment, Figure 1 , Figure 2 and Figure 5 As shown, a bearing is movably connected to the middle of the top end of the rear bracket 1, and a metal bearing pressure plate is fixed to the top of the inner wall of the rear bracket 1, and the top of the metal bearing pressure plate is movably connected to the bottom of the bearing.

[0041] The bearing is used for assembling the shaft rod 7 and the rear bracket 1 as an existing structural design solution.

[0042] In this embodiment, Figure 2 and Figure 3 As shown, a plurality of isolation sheets 31 are fixedly provided on opposite sides of the two carbon powder spacers 3. The isolation sheets 31 are located on the inner side of the rear bracket 1 and the outer side of the connection between the carbon powder spacers 3 to separate the inner side of the rear bracket 1 from the bakelite carbon brush box 2. Intermittent grooves 32 are formed between adjacent isolation sheets 31.

[0043] The design of the isolation sheet 31 and the discontinuous groove 32 enables the carbon powder spacer 3 to block the accumulation of carbon powder at the bottom of the bakelite carbon brush box 2 and the rear bracket 1 to avoid the formation of a pressure-resistant passage. The rubber eyelet shield 5 covers the exposed metal part of the copper eyelet 4. In this way, even if some carbon powder is connected to the outside of the copper eyelet 4, a pressure-resistant passage between the carbon brush in the bakelite carbon brush box 2 and the copper eyelet 4 can be avoided.

[0044] In this embodiment, Figure 4 As shown, a plurality of isolation grooves 33 are fixedly provided on opposite sides of the two carbon powder spacers 3 along the radial direction of the carbon brush holes thereof, and the isolation grooves 33 are located on the inner side of the rear bracket 1 and the outer side of the connection between the carbon powder spacers 3 to separate the inner side of the rear bracket 1 from the bakelite carbon brush box 2.

[0045] The design of the isolation groove 33 enables the carbon powder spacer 3 to block the accumulation of carbon powder at the bottom of the bakelite carbon brush box 2 and the rear bracket 1, thereby avoiding the formation of a pressure-resistant passage.

[0046] In the present application, the carbon powder spacer 3 and the rubber eyelet shield 5 can be integrated into a whole and made of the same insulating material by integral injection molding. The advantage is that the product structure is simplified, the assembly process of the components is simplified, and the processing cost and material cost are reduced.

[0047] In this embodiment, Figure 1 , Figure 5 and Figure 6As shown, an air duct 6 is clamped on the front and rear sides of the top of the rear bracket 1, and an air inlet 61 and an air outlet 62 are respectively fixed to the bottom and top of the air duct 6. The air inlet 61 is close to the middle of the bottom end of the rear bracket 1, and the air outlet 62 extends to the middle of the top end of the rear bracket 1.

[0048] The design of the air duct 6 is an optional solution for this product, which is selected according to product production and customer needs. When the shaft 7 drives the heat dissipation fan blades 8 to work, the air and spilled carbon powder at the bottom of the rear bracket 1 are discharged to the top of the rear bracket 1 through the air inlet 61 and the air outlet 62, and the flowing air brought up by the heat dissipation fan blades 8 is discharged, thereby improving the air flow efficiency at the bottom of the rear bracket 1 and avoiding a large amount of carbon powder accumulation at the bottom of the rear bracket 1.

[0049] In this embodiment, Figure 1 , Figure 5 and Figure 6 As shown, a shaft rod 7 is movably connected to the middle of the rear bracket 1 , the outer side of the shaft rod 7 is sleeved with the middle of the bearing, and a heat dissipation fan blade 8 is fixed to the top of the shaft rod 7 .

[0050] The design of the shaft 7 and the heat dissipation blades 8 adopts a conventional structural design, which is convenient for the production and subsequent use and maintenance of the product.

[0051] The above-described embodiments only express a certain implementation method of the utility model, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the utility model. It should be pointed out that, for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the patent of the utility model shall be based on the attached claims.

Claims

1. A rear bracket assembly with an eyelet guard, characterized in that: Includes the following structure: A rear bracket (1), wherein the left and right sides of the middle of the rear bracket (1) are both clamped with bakelite carbon brush boxes (2), the opposite sides of the two bakelite carbon brush boxes (2) are both clamped with carbon powder spacers (3), and the left and right sides of the bottom of the rear bracket (1) are both clamped with copper eyelets (4); A rubber eyelet shield (5), wherein the outer side of the rubber eyelet shield (5) is sleeved with the middle part of the copper eyelet (4), and a first plug (51) and a second plug (52) are respectively fixedly provided at the right end and the middle part of the rubber eyelet shield (5), and the opposite sides of the first plug (51) and the second plug (52) are respectively close to the left and right sides of the copper eyelet (4).

2. A rear bracket assembly with eyelet shield according to claim 1, characterized in that: A bearing is movably connected to the middle of the top end of the rear bracket (1), and a metal bearing pressure plate is fixedly provided on the top of the inner wall of the rear bracket (1), wherein the top of the metal bearing pressure plate is movably connected to the bottom of the bearing.

3. A rear bracket assembly with eyelet shield according to claim 1, characterized in that: A plurality of isolation sheets (31) are fixedly disposed on opposite sides of the two carbon powder spacers (3); the isolation sheets (31) are located on the inner side of the rear bracket (1) and the outer side of the connection between the carbon powder spacers (3) so as to separate the inner side surface of the rear bracket (1) from the bakelite carbon brush box (2); and discontinuous grooves (32) are formed between adjacent isolation sheets (31).

4. A rear bracket assembly with eyelet shield according to claim 1, characterized in that: A plurality of isolation grooves (33) are fixedly provided on opposite sides of the two carbon powder spacers (3) along the radial direction of the carbon brush holes thereof, and the isolation grooves (33) are located on the inner side of the rear bracket (1) and the outer side of the connection between the carbon powder spacers (3) so as to isolate the inner side surface of the rear bracket (1) from the bakelite carbon brush box (2).

5. A rear bracket assembly with eyelet shield according to any one of claims 1 to 4, characterized in that: The front and rear sides of the top of the rear bracket (1) are clamped with an air duct (6), and the bottom and top of the air duct (6) are respectively fixed with an air inlet (61) and an air outlet (62), the air inlet (61) is close to the middle of the bottom end of the rear bracket (1), and the air outlet (62) extends to the middle of the top end of the rear bracket (1).

6. A rear bracket assembly with eyelet shield according to any one of claims 1 to 4, characterized in that: The middle part of the rear bracket (1) is movably connected to a shaft rod (7), the outer side of the shaft rod (7) is sleeved with the middle part of the bearing, and the top of the shaft rod (7) is fixedly provided with a heat dissipation fan blade (8).

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