Rear cover assembly of brush motor

Abstract

The utility model relates to a rear cover assembly of a brush motor, which comprises a rear cover, the rear cover comprises a bottom plate and a wall cylinder extending backwards along the bottom plate, the joint of the wall cylinder and the bottom plate is provided with an annular groove, the bottom plate is provided with a wire passing channel and a connecting channel, the front end of the rear cover forms an accommodating groove, and the center of the accommodating groove is provided with a bearing groove. A connecting cylinder corresponding to the connecting channel is arranged in the accommodating groove; the sealing ring is arranged in the annular groove; the carbon brush assembly is arranged in the containing groove, the carbon brush assembly comprises a carbon brush box, a carbon brush, a carbon brush plate and a carbon brush spring, the carbon brush box is riveted to the carbon brush plate, the carbon brush is arranged in the carbon brush box in a sliding mode, and the carbon brush spring abuts against the outer end of the carbon brush; the temperature switch is arranged in the containing groove and the wire protecting sleeve and is provided with a conical wire hole, the wire protecting sleeve is clamped in the wire passing channel, and the inner diameter of the conical wire hole is gradually increased backwards; the power line penetrates through the conical line hole and is electrically connected with the carbon brush assembly, and the outer diameter of the power line is larger than the aperture of the small hole end of the conical line hole.

Description

Technical Field

[0001] This utility model relates to the field of brushed motor technology, and in particular to a brushed motor rear cover assembly. Background Technology

[0002] The rear cover of a brushed motor often serves to mount circuit boards and / or brush modules, thus requiring increasingly higher sealing and heat dissipation performance, which existing brushed motor rear covers cannot meet. Utility Model Content

[0003] In view of the above situation, it is necessary to propose a brushed motor back cover assembly with good airtightness.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a brushed motor rear cover assembly, comprising:

[0005] The rear cover includes a base plate and a wall cylinder extending rearward along the base plate. The outer diameter of the wall cylinder is smaller than the outer diameter of the base plate. An annular groove is provided at the connection between the wall cylinder and the base plate. A wire passage and a connection passage are provided on the base plate. The front end of the rear cover is formed by the wall cylinder to form a receiving groove. A bearing groove is provided at the center of the receiving groove. A connecting cylinder corresponding to the connection passage is provided in the receiving groove.

[0006] A sealing ring is disposed within the annular groove;

[0007] A carbon brush assembly is disposed in the receiving groove. The carbon brush assembly includes a carbon brush box, a carbon brush, a carbon brush plate, and a carbon brush spring. The carbon brush plate is provided with a bearing clearance hole corresponding to the bearing groove. The carbon brush box is riveted to the carbon brush plate. The carbon brush is slidably disposed in the carbon brush box. The carbon brush spring abuts against the outer end of the carbon brush.

[0008] A temperature switch is configured in the receiving tank.

[0009] A wire protector sleeve is provided with a conical wire hole. The wire protector sleeve is snapped into the wire passage, and the inner radial direction of the conical wire hole gradually increases.

[0010] A power cord passes through the conical wire hole and is electrically connected to the carbon brush assembly. The outer diameter of the power cord is larger than the diameter of the small hole end of the conical wire hole.

[0011] Furthermore, the rear end of the back cover is provided with several heat dissipation ribs.

[0012] Furthermore, the end of the wall cylinder away from the bottom plate is provided with a stepped groove, and the end face of the connecting cylinder is flush with the end face of the stepped groove.

[0013] Furthermore, the carbon brush plate is supported on the stepped groove.

[0014] Furthermore, the receiving groove is also provided with several connecting support cylinders, and the connecting screws fix the carbon brush plate through the connecting support cylinders.

[0015] Furthermore, the power cord includes a first lead and a second lead, and the carbon brush box includes a first carbon brush box and a second carbon brush box. Both the first carbon brush box and the second carbon brush box are electrically connected to the carbon brush plate. The first lead is electrically connected to the first carbon brush box. The first carbon brush box is connected to the braid of the carbon brush inside it. The second carbon brush box is connected to the braid of the carbon brush inside it. The second carbon brush box is connected to one end of the temperature switch, and the second lead is connected to the other end of the temperature switch.

[0016] Furthermore, it also includes a capacitor, one end of which is connected to the second carbon brush box and the other end of which is connected to the temperature switch.

[0017] Furthermore, the wall cylinder is provided with two symmetrically arranged carbon brush notches, and the carbon brush box is provided corresponding to the carbon brush notches.

[0018] Furthermore, the carbon brush plate has a limiting protrusion extending toward the carbon brush notch.

[0019] Furthermore, the outer wall of the wall cylinder is provided with a foolproof groove.

[0020] The beneficial effects of this utility model are as follows: the base plate extends beyond the wall cylinder and an annular groove is provided at the connection between the wall cylinder and the base plate to accommodate the sealing ring, thereby improving the sealing performance of the rear cover and the middle shell; a connecting cylinder is provided in the receiving groove of the rear cover, and the connecting channel for bolts to pass through is located inside the connecting cylinder, which improves the sealing performance; a cable sleeve is provided at the power cord, and the cable sleeve adopts a conical wire hole, the inner diameter of the small end of the conical wire hole being smaller than the outer diameter of the power cord, thereby ensuring a tight fit between the two and guaranteeing sealing performance. Furthermore, a temperature switch is also configured to prevent overheating from damaging the motor. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of a brushed motor rear cover assembly according to an embodiment of the present invention;

[0022] Figure 2 This is a schematic diagram of the structure of a brushed motor rear cover assembly according to another embodiment of the present invention;

[0023] Figure 3 This is a schematic diagram of the carbon brush assembly of a brushed motor rear cover assembly according to an embodiment of the present invention;

[0024] Figure 4 This is a schematic diagram of the carbon brush assembly of a brushed motor rear cover assembly according to another embodiment of the present invention;

[0025] Figure 5 This is a schematic diagram of the structure of the rear cover of a brushed motor rear cover assembly according to an embodiment of this utility model;

[0026] Figure 6 This is a schematic diagram of the wire protection sleeve of a brushed motor rear cover assembly according to an embodiment of the present invention;

[0027] Figure 7 This is a schematic cross-sectional view of the wire guard sleeve of a brushed motor rear cover assembly according to an embodiment of the present invention.

[0028] Label Explanation:

[0029] 100. Back cover; 110. Base plate; 111. Cable routing channel; 112. Heat dissipation fins; 120. Wall tube;

[0030] 121. Stepped groove; 122. Mistake-proof groove; 123. Carbon brush notch; 130. Circular groove; 140. Receiving groove;

[0031] 141. Bearing groove; 150. Connecting cylinder; 151. Connecting channel; 160. Connecting support cylinder;

[0032] 200, Sealing ring; 300, Carbon brush assembly; 310, Carbon brush holder; 311, First carbon brush holder;

[0033] 312. Second carbon brush box; 313. Rivet pin; 314. Electrical connection pin; 320. Carbon brush; 321. Brush braid;

[0034] 330. Carbon brush plate; 331. Limiting protrusion; 332. Bearing clearance hole; 340. Carbon brush spring;

[0035] 400. Temperature switch; 500. Cable sheath; 510. Conical wire hole; 600. Power cord;

[0036] 610, First lead; 620, Second lead; 700, Capacitor. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description of a brushed motor rear cover assembly, in conjunction with the accompanying drawings and embodiments, is provided. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the scope of the utility model.

[0038] Please refer to Figures 1-7 A brushed motor rear cover assembly, comprising:

[0039] The rear cover 100 includes a base plate 110 and a wall cylinder 120 extending rearward along the base plate 110. The outer diameter of the wall cylinder 120 is smaller than the outer diameter of the base plate 110. An annular groove 130 is provided at the connection between the wall cylinder 120 and the base plate 110. The base plate 110 is provided with a wire passage 111 and a connecting passage 151. The front end of the rear cover 100 is formed by the wall cylinder 120 to form a receiving groove 140. A bearing groove 141 is provided at the center of the receiving groove 140. A connecting cylinder 150 corresponding to the connecting passage 151 is provided in the receiving groove 140.

[0040] The sealing ring 200 is configured within the annular groove 130;

[0041] A carbon brush assembly 300 is disposed in a receiving groove 140. The carbon brush assembly 300 includes a carbon brush box 310, a carbon brush 320, a carbon brush plate 330, and a carbon brush spring 340. The carbon brush plate 330 is provided with a bearing clearance hole 332 corresponding to the bearing groove 141. The carbon brush box 310 is riveted to the carbon brush plate 330. The carbon brush 320 is slidably disposed in the carbon brush box 310. The carbon brush spring 340 abuts against the outer end of the carbon brush 320.

[0042] Temperature switch 400 is configured in receiving tank 140.

[0043] The cable sleeve 500 has a conical wire hole 510. The cable sleeve 500 is snapped into the wire passage 111. The inner radial direction of the conical wire hole 510 gradually increases.

[0044] The power cord 600 passes through the conical wire hole 510 and is electrically connected to the carbon brush assembly 300. The outer diameter of the power cord 600 is larger than the diameter of the small hole end of the conical wire hole 510.

[0045] The base plate 110 extends beyond the wall cylinder 120, and an annular groove 130 is provided at the connection between the wall cylinder 120 and the base plate 110 to accommodate the sealing ring 200, thereby improving the sealing performance between the rear cover 100 and the middle shell. A connecting cylinder 150 is provided in the receiving groove 140 of the rear cover 100, and a connecting channel 151 for bolts to pass through is located inside the connecting cylinder 150, which improves the sealing performance. A cable sleeve 500 is provided at the power cord 600. The cable sleeve 500 adopts a conical wire hole 510, and the inner diameter of the small end of the conical wire hole 510 is smaller than the outer diameter of the power cord 600, thereby ensuring a tight fit between the two and guaranteeing sealing performance. A temperature switch 400 is also provided to prevent the motor from being damaged due to excessive temperature.

[0046] Please refer to Figure 2 The rear end of the back cover 100 is provided with several heat dissipation fins 112. This improves the heat dissipation capacity of the back cover assembly and ensures the normal operation of the motor.

[0047] Please refer to Figure 1 and Figure 5The end of the wall cylinder 120 away from the bottom plate 110 is provided with a stepped groove 121, and the end face of the connecting cylinder 150 is flush with the end face of the stepped groove 121. The flush end face ensures that the connecting channel 151 is sealed when the rear cover 100 is connected to the middle shell of the motor, thus ensuring airtightness.

[0048] Please refer to Figure 1 and Figure 5 The carbon brush plate 330 is supported on the stepped groove 121. This ensures the stability of the carbon brush plate 330 during installation and facilitates heat dissipation.

[0049] Please refer to Figure 1 and Figure 5 The receiving groove 140 is also provided with several connecting support cylinders 160, and the connecting screws fix the carbon brush plate 330 through the connecting support cylinders 160. Multiple connecting support cylinders 160 can be provided as needed.

[0050] Please refer to Figure 1 , Figure 3 and Figure 4 The power cord 600 includes a first lead 610 and a second lead 620. The carbon brush holder 310 includes a first carbon brush holder 311 and a second carbon brush holder 312. Both the first carbon brush holder 311 and the second carbon brush holder 312 are electrically connected to the carbon brush plate 330. The first lead 610 is electrically connected to the first carbon brush holder 311. The first carbon brush holder 311 is connected to the braid 321 of the carbon brush 320 inside it. The second carbon brush holder 312 is connected to the braid 321 of the carbon brush 320 inside it. The second carbon brush holder 312 is connected to one end of the temperature switch 400, and the second lead 620 is connected to the other end of the temperature switch 400. Specifically, each carbon brush holder 310 includes a pair of riveting pins 313 and a pair of electrical connection pins 314. The riveting pins 313 are riveted to the carbon brush plate 330, and the electrical connection pins 314 are used for electrical connection.

[0051] Please refer to Figure 4 It also includes a capacitor 700, one end of which is connected to the second carbon brush box 312 and the other end is connected to the temperature switch 400.

[0052] Please refer to Figure 1 , Figure 2 and Figure 5 The wall cylinder 120 has two symmetrically arranged carbon brush notches 123, and the carbon brush box 310 is set accordingly. The carbon brush notches 123 are designed to facilitate the installation of carbon brushes 320.

[0053] Please refer to Figure 1 , Figure 2 and Figure 5 The carbon brush plate 330 has a limiting protrusion 331 extending toward the carbon brush notch 123, which improves the stability of the carbon brush plate 330 during installation.

[0054] Please refer to Figure 5 The outer wall of the wall cylinder 120 is provided with a foolproof groove 122. The foolproof groove 122 is provided to ensure the correct docking position of the rear cover 100 and the middle shell.

[0055] Understandably, the carbon brush spring 340 generally includes a torsion spring and a mounting post. The mounting post is riveted and fixed to the carbon brush plate 330, and the torsion spring is sleeved on the mounting post.

[0056] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0057] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," such descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features.

[0058] In summary, this utility model provides a brushed motor rear cover assembly. The base plate extends beyond the wall cylinder, and an annular groove is provided at the connection between the wall cylinder and the base plate to accommodate a sealing ring, improving the sealing performance between the rear cover and the middle shell. A connecting cylinder is installed within the receiving groove of the rear cover, with the connecting channel for bolts located inside the connecting cylinder, further enhancing the sealing performance. A cable protector is provided at the power cord location. The cable protector uses a conical wire hole, with the inner diameter of the small end of the conical wire hole being smaller than the outer diameter of the power cord, ensuring a tight fit and guaranteeing sealing performance. Furthermore, a temperature switch is included to prevent overheating and potential motor damage.

[0059] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A brushed electric motor back cover assembly, characterized by, include: The rear cover includes a base plate and a wall cylinder extending rearward along the base plate. The outer diameter of the wall cylinder is smaller than the outer diameter of the base plate. An annular groove is provided at the connection between the wall cylinder and the base plate. A wire passage and a connection passage are provided on the base plate. The front end of the rear cover is formed by the wall cylinder to form a receiving groove. A bearing groove is provided at the center of the receiving groove. A connecting cylinder corresponding to the connection passage is provided in the receiving groove. A sealing ring is disposed within the annular groove; A carbon brush assembly is disposed in the receiving groove. The carbon brush assembly includes a carbon brush box, a carbon brush, a carbon brush plate, and a carbon brush spring. The carbon brush plate is provided with a bearing clearance hole corresponding to the bearing groove. The carbon brush box is riveted to the carbon brush plate. The carbon brush is slidably disposed in the carbon brush box. The carbon brush spring abuts against the outer end of the carbon brush. A temperature switch is configured in the receiving tank. A wire protector sleeve is provided with a conical wire hole. The wire protector sleeve is snapped into the wire passage, and the inner radial direction of the conical wire hole gradually increases. A power cord passes through the conical wire hole and is electrically connected to the carbon brush assembly. The outer diameter of the power cord is larger than the diameter of the small hole end of the conical wire hole.

2. A brushed motor back cover assembly according to claim 1, wherein, The rear end of the back cover is provided with several heat dissipation ribs.

3. A brushed motor back cover assembly according to claim 1, wherein, The end of the wall cylinder away from the bottom plate is provided with a stepped groove, and the end face of the connecting cylinder is flush with the end face of the stepped groove.

4. A brushed electric motor back cover assembly according to claim 3, wherein, The carbon brush plate is supported on the stepped groove.

5. A brushed motor back cover assembly as claimed in claim 1, wherein, The receiving groove is also provided with several connecting support cylinders, and the connecting screws fix the carbon brush plate through the connecting support cylinders.

6. A brushed electric motor back cover assembly as claimed in claim 1, wherein, The power cord includes a first lead and a second lead. The carbon brush box includes a first carbon brush box and a second carbon brush box. Both the first carbon brush box and the second carbon brush box are electrically connected to the carbon brush plate. The first lead is electrically connected to the first carbon brush box. The first carbon brush box is connected to the braid of the carbon brush inside it. The second carbon brush box is connected to the braid of the carbon brush inside it. The second carbon brush box is connected to one end of the temperature switch. The second lead is connected to the other end of the temperature switch.

7. A brushed electric motor back cover assembly according to claim 6, wherein, It also includes a capacitor, one end of which is connected to the second carbon brush box and the other end of which is connected to the temperature switch.

8. A brushed electric motor back cover assembly as set forth in claim 1, wherein, The wall cylinder has two symmetrically arranged carbon brush notches, and the carbon brush box is arranged corresponding to the carbon brush notches.

9. A brushed electric motor back cover assembly according to claim 8, wherein, The carbon brush plate has a limiting protrusion extending toward the carbon brush notch.

10. A brushed motor rear cover assembly according to claim 1, characterized in that, The outer wall of the wall cylinder is provided with a foolproof groove.

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