Waterproof motor with wear-resistant bushing

Abstract

The utility model relates to the technical field of motors, and provides a waterproof motor with a wear-resistant bushing, which comprises a motor main body, a waterproof shell, a bearing, a rotating shaft, a framework oil seal and a wear-resistant bushing, the waterproof shell sleeves the motor main body; the rotating shaft is fixed to the motor body through a bearing. The framework oil seal is installed on the motor body. A wear-resisting bush is arranged between the framework oil seal and the rotating shaft, the wear-resisting bush and the rotating shaft are installed in an interference mode in the diameter direction, and meanwhile structural sealant is arranged between the wear-resisting bush and the rotating shaft for sealing. According to the waterproof motor with the wear-resistant bushing provided by the utility model, the cost loss caused by easy wear of the rotating shaft is reduced by adding the wear-resistant bushing, and besides interference fit connection between the wear-resistant bushing and the rotating shaft, the wear-resistant bushing and the rotating shaft are fixedly mounted by using structural sealant, so that the mounting stability of the wear-resistant bushing is ensured, the whole motor is safer and more stable, and the service life of the motor is prolonged. And the method has good application value.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, and particularly relates to a waterproof motor with a wear-resistant bushing. Background Art

[0002] For a motor using a skeleton oil seal for shaft-end sealing, in order to improve the sealing life of the skeleton oil seal, high hardness and high surface finish are required for the mating surface of the rotating shaft with the oil seal. If the working environment is high humidity and high corrosion, corrosion resistance is also required for the mating surface of the rotating shaft with the oil seal. This makes the rotating shaft that truly meets the requirements usually need to use very costly materials and complex heat treatment and surface treatment processes under harsh environmental conditions.

[0003] The prior art reduces the requirements for the rotating shaft by adding a wear-resistant bushing to achieve cost reduction. However, the prior art only realizes simple sealed installation through the interference fit between the bushing and the rotating shaft, which is insufficient to cope with some harsher working conditions, resulting in potential hazards for the overall motor. Summary of the Utility Model

[0004] To solve the deficiencies in the above-mentioned prior art, the utility model provides a waterproof motor with a wear-resistant bushing, which includes a motor main body, a waterproof housing, bearings, a rotating shaft, a skeleton oil seal, and a wear-resistant bushing; the waterproof housing is sleeved on the motor main body; the rotating shaft is fixed to the motor main body through bearings; the skeleton oil seal is installed on the motor main body; a wear-resistant bushing is arranged between the skeleton oil seal and the rotating shaft. The wear-resistant bushing is installed with interference in the diameter direction with the rotating shaft, and at the same time, a structural sealant is also arranged between the wear-resistant bushing and the rotating shaft for sealing.

[0005] Further, a first accommodating space is formed between the shaft-end chamfer of the wear-resistant bushing and the bearing end face, and an O-ring is installed in the first accommodating space.

[0006] Further, in the length direction of the rotating shaft, the cross-section of the first accommodating space is triangular.

[0007] Further, in the length direction of the rotating shaft, the cross-section of the first accommodating space is rectangular.

[0008] Further, a second accommodating space is formed at a preset distance between the wear-resistant bushing and the bearing end face close to the wear-resistant bushing, and a rubber flat washer is arranged in the second accommodating space.

[0009] Further, the waterproof motor is also provided with a water-blocking rubber ring, which is fixedly connected to the rotating shaft and is arranged close to the wear-resistant bushing.

[0010] Based on the above, compared with the prior art, the waterproof motor with wear-resistant bushings provided by the present utility model reduces the cost loss caused by easy wear of the rotating shaft by adding wear-resistant bushings. In addition to the interference fit connection between the wear-resistant bushing and the rotating shaft, structural sealant is also used for fixed installation, ensuring the stability of the installation of the wear-resistant bushing, making the overall motor safer and more stable, and having good application value.

[0011] Other features and beneficial effects of the present utility model will be described in the subsequent specification, and part of them will become obvious from the specification or be understood by implementing the present utility model. The objectives and other beneficial effects of the present utility model can be achieved and obtained through the structures specifically pointed out in the specification, claims, and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts; in the following description of the positional relationships in the drawings, unless otherwise specified, the directions shown in the drawings of the components are used as the reference.

[0013] Figure 1 Structural schematic diagram of the waterproof motor with wear-resistant bushings provided by an embodiment of the present utility model;

[0014] Figure 2 Structural schematic diagram of the wear-resistant bushing with overflow glue provided by an embodiment of the present utility model;

[0015] Figure 3 For Figure 2 Enlarged view of part A;

[0016] Figure 4 Structural schematic diagram of the first accommodation space being rectangular provided by an embodiment of the present utility model;

[0017] Figure 5 For Figure 4 Enlarged view of part B;

[0018] Figure 6 Structural schematic diagram of the second accommodation space provided by an embodiment of the present utility model;

[0019] Figure 7 For Figure 6 Enlarged view of part C.

[0020] Reference numerals:

[0021] Detailed implementation manners

[0022] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are some but not all of the embodiments of the present utility model. The technical features designed in different implementation manners of the present utility model described below can be combined with each other as long as they do not conflict with each other. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts shall fall within the protection scope of the present utility model.

[0023] In the description of the present utility model, it should be noted that all terms used in the present utility model (including technical terms and scientific terms) have the same meanings as those commonly understood by those of ordinary skill in the art to which the present utility model belongs, and should not be construed as a limitation to the present utility model. It should be further understood that the terms used in the present utility model should be understood as having meanings consistent with their meanings in the context of this specification and the relevant art, and should not be understood in an idealized or overly formal sense, unless clearly defined as such in the present utility model.

[0024] The present utility model provides a waterproof motor with a wear-resistant bushing, as Figure 1 shown, which includes a motor main body 10, a waterproof housing, a bearing 20, a rotating shaft 30, a skeleton oil seal 40 and a wear-resistant bushing 50;

[0025] The waterproof housing (not shown in the figure) is sleeved on the motor main body 10; the rotating shaft 30 is fixed to the motor main body 10 through the bearing 20; the skeleton oil seal 40 is installed on the motor main body 10;

[0026] A wear-resistant bushing 50 is arranged between the skeleton oil seal 40 and the rotating shaft 30. In the diameter direction, the wear-resistant bushing 50 is installed with an interference fit with the rotating shaft 20, and a structural sealant 51 is also arranged between the wear-resistant bushing 50 and the rotating shaft 20 for sealing.

[0027] Specifically, the rotating shaft 30 is supported by a pair of bearings 20 (only 1 is drawn in the schematic diagram). The skeleton oil seal 40 is installed in the mounting hole of the flange of the motor main body 10, and the outside of the skeleton oil seal 40 is a rubber-coated structure, which can form a seal with the mounting hole of the flange of the motor main body 10.

[0028] The wear-resistant bushing 50 is made of corrosion-resistant metal material, so that the sealing surface formed by its sealing lip with the skeleton oil seal 40 will not be corroded and damaged. The wear-resistant bushing 50 is heat-treated and ground to have a high surface hardness and finish, ensuring its wear-resistant life. Correspondingly, the requirements for the material, heat treatment, and surface treatment of the rotating shaft 30 can be reduced. Although the material and requirements of the wear-resistant bushing 50 are relatively high, the material consumption is small, and the comprehensive cost will be greatly reduced.

[0029] The wear-resistant bushing 50 is fixedly installed on the rotating shaft 30 and has a small interference fit in the diameter direction with the rotating shaft 30, so that the wear-resistant bushing 50 and the rotating shaft 30 cannot rotate relative to each other. Before press-fitting, an appropriate amount of liquid structural sealant 51 is applied to the glue groove on the rotating shaft 30. During the press-fitting process, the sealant will fill some small gaps on the mating surface of the wear-resistant bushing 50 and the rotating shaft 30, making the sealing performance and life of the mating surface very high.

[0030] In an embodiment, a first accommodation space 71 is formed between the shaft end chamfer of the wear-resistant bushing 50 and the end face of the bearing 20, and an O-ring 61 is installed in the first accommodation space 71.

[0031] Specifically, one end face of the extension part of the wear-resistant bushing 50 is pressed against the inner ring end face of the bearing 20, and a first accommodation space 71 for installing the O-ring is formed between the end face chamfer of the wear-resistant bushing 50 and the end face of the bearing 20. The O-ring has two functions. The first function is to strengthen the sealing between the wear-resistant complete set and the bearing 20. The second function is to prevent the uncurred structural sealant 51 from being thrown out during the motor test and causing pollution. As Figure 2 shown, after the sealant is applied to the shaft and the press-fitting is completed, it is necessary to ensure that there is a small amount of overflow glue to ensure that the amount of sealant is sufficient. The curing time of the structural sealant 51 is generally relatively long, such as 24 hours. After the press-fitting is completed and the subsequent motor assembly is completed, the structural sealant 51 is still in an uncured state. During the finished product test of the motor, the rotation of the rotating shaft 30 will surely throw out the uncured sealant, and the thrown-out sealant will pollute the bearing 20 and cause many other uncontrollable effects. With the presence of the O-ring, this risk will be eliminated, so that during the finished product test of the motor, the sealant thrown out by the rotating shaft 30 can be blocked by the O-ring.

[0032] Preferably, in the length direction of the rotating shaft 30, as Figure 3 shown, the cross-section of the first accommodation space 71 is triangular.

[0033] The cross-section of the first accommodation space 71 is triangular, which is naturally formed between the end face chamfer of the wear-resistant bushing 50 and the end face of the bearing 20. This design does not require additional processing of the wear-resistant bushing 50, making the cost control of the wear-resistant bushing 50 more reasonable.

[0034] Preferably, in the length direction of the rotating shaft 30, asFigure 4 and Figure 5 As shown, the cross-section of the first accommodation space 71 is rectangular.

[0035] Specifically, as Figure 4 and Figure 5 shown, the chamfer at the shaft end of the wear-resistant bushing 50 is changed to a rectangular open slot, and an O-ring is used to form a seal with the bearing 20.

[0036] In one embodiment, as Figure 6 and Figure 7 shown, a second accommodation space 72 is formed at a preset distance between the wear-resistant bushing 50 and the bearing 20 close to the wear-resistant bushing 50, and a rubber flat washer 62 is provided in the second accommodation space 72.

[0037] Specifically, as Figure 6 and Figure 7 shown, the chamfer at the shaft end of the wear-resistant bushing 50 is cancelled, only the press-fitting guiding chamfer is retained, and a rubber flat washer 62 is used to form a seal with the bearing 20.

[0038] In one embodiment, as Figure 1 shown, the waterproof motor is further provided with a water-blocking rubber ring 80, which is fixedly connected to the rotating shaft 30 and is arranged close to the wear-resistant bushing 50.

[0039] Specifically, the water-blocking rubber ring 80 is made of rubber and is fixed to the mounting groove of the rotating shaft 30 by elastic force. The water-blocking rubber ring 80 rotates with the rotating shaft 30 when the motor is working. Whether the motor is in the working state or not, the water-blocking rubber ring 80 can prevent the sprayed or splashed water from directly spraying onto the sealing lips of the skeleton oil seal 40 and the wear-resistant bushing 50.

[0040] In addition, those skilled in the art should understand that although there are many problems in the prior art, each embodiment or technical solution of the present invention can be improved only in one or several aspects, and it is not necessary to solve all the technical problems listed in the prior art or the background art at the same time. Those skilled in the art should understand that the content not mentioned in a claim should not be regarded as a limitation to that claim.

[0041] Although terms such as motor body, bearing, rotating shaft, skeleton oil seal, wear-resistant bushing, structural sealant, O-ring seal, rubber flat washer, first accommodation space, second accommodation space, and water-blocking rubber ring are used more frequently in this article, the possibility of using other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of the present utility model; interpreting them as any additional limitation is contrary to the spirit of the present utility model; the terms "first", "second", etc. (if any) in the description, claims, and above-mentioned drawings of the embodiments of the present utility model are used to distinguish similar objects and do not necessarily describe a specific order or sequence.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model and are not intended to limit them; although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present utility model.

Claims

1. A waterproof motor with a wear-resistant bushing, characterized in that: It includes the motor body, waterproof housing, bearings, rotating shaft, skeleton oil seal and wear-resistant bushing; The waterproof housing is sleeved on the motor body; the rotating shaft is fixed to the motor body through the bearing; the skeleton oil seal is installed on the motor body; A wear-resistant bushing is arranged between the skeleton oil seal and the rotating shaft. The wear-resistant bushing and the rotating shaft are interference-fitted in the diameter direction. Meanwhile, a structural sealant is arranged between the wear-resistant bushing and the rotating shaft for sealing.

2. The waterproof motor with a wear-resistant bushing according to claim 1, characterized in that: A first accommodating space is formed between the shaft end chamfer of the wear-resistant bushing and the bearing end surface, and an O-type sealing ring is installed in the first accommodating space.

3. The waterproof motor with a wear-resistant bushing according to claim 2, characterized in that: In the length direction of the rotating shaft, the cross section of the first accommodating space is a triangle.

4. The waterproof motor with a wear-resistant bushing according to claim 2, characterized in that: In the length direction of the rotating shaft, the cross section of the first accommodating space is rectangular.

5. The waterproof motor with a wear-resistant bushing according to claim 1, characterized in that: A preset distance is provided between the wear-resistant bushing and the bearing end surface close to the wear-resistant bushing to form a second accommodation space, and a rubber flat washer is provided in the second accommodation space.

6. The waterproof motor with a wear-resistant bushing according to claim 1, characterized in that: The waterproof motor is also provided with a water-retaining rubber ring, which is fixedly connected to the rotating shaft and arranged close to the wear-resistant bushing.

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