Oil seal sleeve for speed reducer

Abstract

The utility model discloses an oil seal sleeve for a speed reducer, and belongs to the field of oil seal. Comprising an oil seal sleeve. The oil seal sleeve is used for forming an inner annular abutting surface abutting against the output shaft of the speed reducer and an outer annular abutting surface abutting against the oil seal; at least zirconium oxide ceramic layers are formed on the inner annular abutting face and the outer annular abutting face. The speed reducer has the beneficial effects that the oil seal sleeve is installed at the position, where the oil seal is installed, of the output shaft of the speed reducer, so that the inner annular abutting face of the oil seal sleeve directly abuts against the output shaft of the speed reducer, the oil seal is installed on the outer annular abutting face of the oil seal sleeve, and the zirconium oxide ceramic layers are arranged on the inner annular abutting face and the outer annular abutting face of the oil seal sleeve; the abrasion of the oil seal to the oil seal sleeve can be effectively reduced, even if the oil seal sleeve is seriously abraded, only the oil seal sleeve needs to be replaced, and the speed reducer does not need to be disassembled and assembled, so that the cost is saved, and the time cannot be wasted too much.

Description

Technical Field

[0001] The present application relates to the field of oil seals, and in particular to an oil seal sleeve for a reducer. Background Art

[0002] An oil seal is usually used between the reducer housing and the reducer output shaft to prevent liquid lubricating oil from leaking out of the housing. However, after the reducer is used for a long time, the oil seal will cause a certain degree of wear on the reducer output shaft, and the liquid lubricating oil inside the reducer will flow out of the reducer housing along the worn area, thereby increasing the maintenance cost. If the reducer output shaft is lightly worn, it can be repaired by repair welding or brush plating. If the reducer output shaft is severely worn, it can only be repaired by replacing the reducer shaft. The cost of this method is too high. At the same time, replacing the reducer shaft requires the reducer to be disassembled and installed as a whole, which is too time-consuming. Utility Model Content

[0003] The content of this application is used to briefly introduce concepts that will be described in detail in the detailed description section below. The content of this application is not intended to identify key features or essential features of the technical solution for which protection is sought, nor is it intended to limit the scope of the technical solution for which protection is sought.

[0004] In order to solve the technical problems mentioned in the above background technology section, some embodiments of the present application provide an oil seal sleeve for a reducer, wherein the oil seal sleeve is used to form an inner annular abutting surface abutting the output shaft of the reducer and an outer annular abutting surface abutting the oil seal; at least a oxidized ceramic layer is formed on the inner annular abutting surface and the outer annular abutting surface.

[0005] Furthermore, the oxidized ceramic layer is replaced by a tungsten steel layer.

[0006] Furthermore, the inner annular abutting surface abuts against the output shaft of the reducer in an interference fit manner; and the outer annular abutting surface abuts against the oil seal in an interference fit manner.

[0007] Furthermore, one end of the oil seal sleeve is used to form a guide portion for inserting the oil seal.

[0008] Furthermore, a groove is formed on the outer annular abutting surface, and the groove is used for installing the oil seal.

[0009] Furthermore, a clamping portion is formed on the clamping groove, and the clamping portion is used to form an installation chamber in the clamping groove for installing the oil seal; when the oil seal contacts the outer annular abutting surface, the oil seal deforms and forms a deformation portion embedded in the clamping groove; the installation chamber is used to clamp the deformation portion.

[0010] Furthermore, a driving component is formed in the clamping slot, and the driving component is used to move the clamping portion closer to or away from the oil seal, so as to enlarge or reduce the installation cavity formed between the clamping portion and the clamping slot.

[0011] Furthermore, a threaded hole is provided in the clamping slot; a screw rod and an abutment block are provided at the clamping slot; the screw rod is threadedly connected to the threaded hole, and the abutment block is fixed to the screw rod; the abutment block is used to form the clamping portion.

[0012] Furthermore, a guide chamber is provided between the reducer output shaft and the reducer housing; a deep groove ball bearing is provided in the guide chamber; the deep groove ball bearing is used to form a rotational connection between the reducer output shaft and the reducer housing for the reducer output shaft to rotate relative to the reducer housing; the deep groove ball bearing is provided at one end of the oil seal sleeve away from the reducer output shaft.

[0013] The beneficial effect of the present application is that an oil seal sleeve is installed at the position where the oil seal is installed on the output shaft of the reducer, so that the inner annular abutting surface of the oil seal sleeve directly abuts against the output shaft of the reducer, and the oil seal is installed on the outer annular abutting surface of the oil seal sleeve. The inner annular abutting surface and the outer annular abutting surface of the oil seal ring are both provided with a white oxide ceramic layer, which can effectively reduce the wear of the oil seal on the oil seal sleeve. Even if the oil seal sleeve is severely worn, it is only necessary to replace the oil seal sleeve without disassembling the reducer, which saves costs and does not waste too much time. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The drawings constituting a part of this application are used to provide a further understanding of this application and make other features, purposes and advantages of this application more apparent. The drawings and descriptions of the exemplary embodiments of this application are used to explain this application and do not constitute an improper limitation on this application.

[0015] In addition, throughout the drawings, the same or similar reference numerals represent the same or similar elements. It should be understood that the drawings are schematic and that the elements and components are not necessarily drawn to scale.

[0016] In the attached figure:

[0017] Figure 1 is an overall schematic diagram according to an embodiment of the present application;

[0018] Figure 2 This is a schematic structural diagram of a portion of an embodiment, mainly showing the structure of the reducer output shaft and some surrounding parts;

[0019] Figure 3 yes Figure 2 The enlarged view of part A mainly shows the structure of the oil seal and some surrounding parts;

[0020] Figure 4 It is a structural diagram of a part of the embodiment, mainly showing the structures of the first part, the second part, the third part and some surrounding parts;

[0021] Figure 5 It is a schematic structural diagram of a part of the embodiment, mainly showing the structure of the deformation portion and some surrounding parts;

[0022] Figure 6 It is a structural diagram of a part of the embodiment, mainly showing the structure of the reducer shaft.

[0023] Reference numerals:

[0024] 1. Oil seal sleeve; 11. Inner annular abutment surface; 12. Outer annular abutment surface; 13. Guide portion; 14. First part; 15. Second part; 151. Slot; 152. Clamping portion; 153. Mounting chamber; 154. Deformation portion; 16. Third part; 2. Screw; 21. Abutment block; 3. Reducer housing; 4. Reducer output shaft; 5. Deep groove ball bearing; 6. Reducer rotating shaft; 61. First transmission shaft; 62. Second transmission shaft; 63. Third transmission shaft; 631. Arc keyway; 7. Oil seal. DETAILED DESCRIPTION

[0025] Embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although certain embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be construed as being limited to the embodiments described herein. On the contrary, these embodiments are provided to provide a more thorough and complete understanding of the present disclosure. It should be understood that the drawings and embodiments of the present disclosure are for illustrative purposes only and are not intended to limit the scope of protection of the present disclosure.

[0026] It should also be noted that, for ease of description, only the parts related to the invention are shown in the drawings. In the absence of conflict, the embodiments and features in the embodiments of the present disclosure may be combined with each other.

[0027] It should be noted that the concepts of "first" and "second" mentioned in this disclosure are only used to distinguish different devices, modules or units, and are not used to limit the order or interdependence of the functions performed by these devices, modules or units.

[0028] It should be noted that the modifications of "one" and "multiple" mentioned in the present disclosure are illustrative rather than restrictive, and those skilled in the art should understand that unless otherwise clearly indicated in the context, they should be understood as "one or more".

[0029] The present disclosure will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0030] Reference Figure 1-3 ,

[0031] Example 1

[0032] An oil seal for a reducer is provided. The oil seal forms an inner annular abutment surface for contacting the reducer output shaft and an outer annular abutment surface for contacting the oil seal. Both the inner and outer annular abutment surfaces are formed with at least a layer of tungsten steel. The tungsten steel layer is replaced with a tungsten steel layer. The oil seal is made of a rigid material. The tungsten steel layer is added to increase the wear resistance of the oil seal, thereby extending its lifespan.

[0033] Specifically, the inner annular abutment surface and the reducer output shaft form an interference fit. This allows the reducer shaft to rotate with the oil seal sleeve, while also preventing liquid lubricating oil from leaking out from between the inner annular abutment surface and the reducer output shaft. Threaded glue can also be added between the oil seal sleeve and the reducer output shaft to secure the oil seal sleeve to the reducer output shaft. The outer annular abutment surface and the oil seal form an interference fit, preventing liquid lubricating oil from leaking out from between the oil seal and the outer annular abutment surface when the oil seal is installed on the oil seal sleeve.

[0034] One end of the oil seal sleeve forms a guide for inserting the oil seal. The guide can be rounded or chamfered, with chamfers being preferred in this embodiment. The diameter of the portion on the guide is smaller than the diameter of the oil seal sleeve, making it easier for the oil seal to pass through the guide and be installed on the oil seal sleeve during installation without compromising the sealing effect. If the oil seal sleeve lacks a guide, the inner diameter of the oil seal would need to be enlarged before installation on the oil seal sleeve, which could compromise the sealing effect and hinder sealing.

[0035] Reference Figure 4-5

[0036] Example 2

[0037] The difference from Example 1 is that a card groove is formed on the outer annular abutment surface. In this embodiment, the card groove is a V-shaped groove. The card groove is used to install the oil seal. The oil seal sleeve is composed of a first part, a second part and a third part. The first part and the third part are connected by the second part. Specifically, glue is applied to the two ends of the second part and the first part and the third part are glued to the two ends of the second part to form the oil seal sleeve. The second part is made of rubber material, and the first part and the third part are both made of rigid material. A card groove is formed on the second part. A clamping part is formed on the card groove. The clamping part and the card groove are both integrally formed with the second part. The clamping part is used to form an installation chamber in the card groove for installing the oil seal. When the oil seal contacts the outer annular abutment surface, the oil seal deforms and forms a deformation part embedded in the card groove, and the installation chamber is used to clamp the deformation part. The setting of the deformation part is to enable the installation chamber to change in size to a certain extent, so that the size of the installation chamber matches the thickness of the oil seal. When the oil seal is installed in the installation chamber, the size of the installation chamber may be larger than the thickness of the oil seal, resulting in a certain amount of movement space for the oil seal in the installation chamber after the oil seal is installed in the installation chamber. This will make the oil seal lose its sealing properties and cause liquid lubricating oil to leak from the reducer housing. The setting of the deformation part can change the size of the installation chamber, so that the clamping part can press the oil seal tightly, thereby making the sealing effect of the oil seal better after being installed in the installation chamber.

[0038] Specifically, a driving component is also formed in the card slot, and the driving component is used to move the card portion closer to or away from the oil seal, so that the installation chamber formed between the card portion and the card slot becomes larger or smaller. A threaded hole is provided in the card slot. In this embodiment, the driving component is a screw. A screw and an abutment block are provided at the card slot. The screw is threadedly connected to the threaded hole, and the abutment block is fixed to the screw. The abutment block is used to form a card portion. First, the installation chamber is enlarged by turning the bolt. At this time, the oil seal can be easily installed in the installation chamber. Then, the bolt is turned to reduce the installation chamber so that the card portion can be pressed against the oil seal to ensure that the oil seal has a good sealing effect after being installed in the installation chamber. Such an operation method can simplify the process of installing the seal.

[0039] Specifically, a guide chamber is provided between the reducer output shaft and the reducer housing. The guide chamber and the reducer housing are integrally formed. A deep groove ball bearing is housed in the guide chamber. The deep groove ball bearing is used to form a rotational connection between the reducer output shaft and the reducer housing, allowing the reducer output shaft to rotate relative to the reducer housing. The deep groove ball bearing is located at the end of the oil seal sleeve facing away from the reducer output shaft. Rotation of the reducer output shaft drives the oil seal sleeve and the oil seal relative to the deep groove ball bearing, thereby preventing wear of the oil seal on the reducer output shaft.

[0040] Reference Figure 6

[0041] This proposal additionally discloses a reducer shaft. The reducer shaft is made of stainless steel. The reducer shaft includes: a first transmission shaft, a second transmission shaft, and a third transmission shaft. The diameter of the first transmission shaft is larger than that of the second transmission shaft. The first, second, and third transmission shafts are integrally formed. One end of the third transmission shaft matches the diameter of the first transmission shaft, and the other end of the third transmission shaft matches the diameter of the second transmission shaft. An arcuate keyway is formed on the third transmission shaft for connecting to other output devices. When the first transmission shaft is located inside the reducer, the second and third transmission shafts are located outside the reducer housing, with the second transmission shaft serving as the output shaft. When the second transmission shaft is located inside the reducer, the first and third transmission shafts are located outside the reducer housing, with the first transmission shaft serving as the output shaft. The larger diameter of the first transmission shaft enables it to withstand higher loads. The arcuate keyway helps reduce vibration and noise caused by contact between the keyway and the key.

[0042] The above description is only an illustration of some preferred embodiments of the present disclosure and the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the embodiments of the present disclosure is not limited to the technical solutions formed by the specific combination of the above-mentioned technical features, but should also cover other technical solutions formed by any combination of the above-mentioned technical features or their equivalent features without departing from the above-mentioned inventive concept. For example, the above-mentioned features are replaced with (but not limited to) technical features with similar functions disclosed in the embodiments of the present disclosure.

Claims

1. An oil seal for a reducer, characterized in that: The oil seal sleeve is used to form an inner annular abutting surface for abutting against the output shaft of the reducer and an outer annular abutting surface for abutting against the oil seal; At least a chromium oxide ceramic layer is formed on the inner annular abutting surface and the outer annular abutting surface.

2. The oil seal sleeve for a reducer according to claim 1, characterized in that: The oxide ceramic layer is replaced with a tungsten steel layer.

3. An oil seal sleeve for a reducer according to claim 1 or 2, characterized in that: The inner annular abutting surface abuts against the output shaft of the reducer in an interference fit manner; The outer annular abutting surface abuts against the oil seal in an interference fit manner.

4. The oil seal sleeve for a reducer according to claim 3, characterized in that: One end of the oil seal sleeve is used to form a guide portion for inserting the oil seal.

5. The oil seal sleeve for a reducer according to claim 3, characterized in that: A groove is formed on the outer annular abutting surface, and the groove is used for installing the oil seal.

6. The oil seal sleeve for a reducer according to claim 5, characterized in that: A clamping portion is formed on the clamping slot, and the clamping portion is used to form an installation cavity in the clamping slot for installing the oil seal; When the oil seal contacts the outer annular abutting surface, the oil seal is deformed to form a deformed portion embedded in the clamping groove; the mounting chamber is used to clamp the deformed portion.

7. The oil seal for a reducer according to claim 6, characterized in that: A driving component is further formed in the clamping slot, and the driving component is used to move the clamping portion closer to or away from the oil seal, so as to enlarge or reduce the installation cavity formed between the clamping portion and the clamping slot.

8. The oil seal sleeve for a reducer according to claim 7, characterized in that: A threaded hole is provided in the slot; a screw and an abutment block are provided at the slot; the screw is threadedly connected to the threaded hole, and the abutment block is fixed to the screw; The abutment block is used to form the clamping portion.

9. An oil seal sleeve for a reducer according to claim 4 or 8, characterized in that: A guide chamber is provided between the reducer output shaft and the reducer housing; a deep groove ball bearing is provided in the guide chamber; the deep groove ball bearing is used to form a rotational connection between the reducer output shaft and the reducer housing, allowing the reducer output shaft to rotate relative to the reducer housing; The deep groove ball bearing is arranged at one end of the oil seal sleeve away from the output shaft of the reducer.

Images