Oil injection structure and angle grinder

Abstract

The utility model discloses an oil injection structure, including the casing, be provided with gear in the casing, still include inner cylinder, outer cylinder, spring and sealing ball, be provided with mounting screw hole on the casing, the outer cylinder is installed on the mounting screw hole of casing, the inner cylinder is detachably arranged in one end of outer cylinder, the other end of outer cylinder is provided with the sealing surface, the sealing ball is slidably arranged in the outer cylinder, the spring is arranged in the outer cylinder, the spring one end is against the sealing ball, the spring other end is against the inner cylinder, the sealing surface is arc, and the sealing surface is used for closely matched with sealing ball. The application also discloses an angle grinder comprising the oil injection structure.

Description

Technical Field

[0001] This utility model relates to the field of power tools, and in particular to an oiling structure and an angle grinder. Background Technology

[0002] Angle grinders are currently a very important tool. The commonly used angle grinder structure is shown in patent publication document CN213998947U. Since the two rotating shafts of the angle grinder need to be driven by gears, in order to ensure the stable and reliable operation between the two gears, lubricating grease needs to be added regularly. The angle grinder shown in CN213998947U does not have a corresponding lubrication structure, so the outer casing needs to be disassembled every time lubricating grease is added. This method of lubrication by disassembling the outer casing is not only inconvenient, but also easily leads to the loss of parts during the disassembly and assembly process. Utility Model Content

[0003] To address the aforementioned problems, this invention proposes an oil injection structure that utilizes an outer cylinder, an inner cylinder, a spring, and a sealing ball to form an elastic, openable and closable oil nozzle. This oil nozzle is detachably mounted on the housing, enabling oil injection without disassembly, making the operation convenient and quick.

[0004] The technical solution adopted by this utility model is as follows: An oil filling structure includes a housing with a gear inside, an inner cylinder, an outer cylinder, a spring, and a sealing ball. The housing has a mounting screw hole, the outer cylinder is mounted on the mounting screw hole, the inner cylinder is detachably disposed at one end of the outer cylinder, and the other end of the outer cylinder has a sealing surface. The sealing ball is slidably disposed within the outer cylinder, and the spring is disposed within the outer cylinder. One end of the spring abuts against the sealing ball, and the other end of the spring abuts against the inner cylinder. The sealing surface is arc-shaped and is used to tightly fit against the sealing ball.

[0005] In this type of oil filling structure, the outer cylinder is detachably installed on the mounting screw hole by installing screw holes on the housing. When it is necessary to inspect the space inside the housing, the outer cylinder can be removed from the mounting screw hole of the housing, so that the condition inside the housing can be observed through the mounting screw hole.

[0006] Meanwhile, in this type of oil injection structure, the inner cylinder, outer cylinder, spring, and sealing ball form an elastic, openable and closable oil nozzle. When the oil nozzle is installed on the mounting screw hole, part of the outer cylinder is located outside the housing. When oil needs to be injected into the housing through the oil nozzle, the oil injection needle of the external device squeezes the sealing ball, causing the sealing ball to no longer adhere tightly to the arc-shaped sealing surface. When the sealing ball no longer adheres tightly to the arc-shaped sealing surface, the sealing ball no longer blocks the outer cylinder, and the oil can then seep into the housing through the outer cylinder. When oil injection needs to be stopped, under the elastic force of the spring, the sealing ball moves back and re-adheres to the sealing surface. When the sealing ball re-adheres to the sealing surface, the sealing ball re-seals the outer cylinder, thus re-sealing the entire oil nozzle.

[0007] In this type of oil filling structure, under normal conditions, the sealing ball is tightly attached to the cover. Therefore, under normal conditions, the oil nozzle is in a closed state. Only when an external object pushes the sealing ball into the shell will the sealing ball not block the outer cylinder.

[0008] In summary, this type of oil filling structure utilizes an outer cylinder, an inner cylinder, a spring, and a sealing ball to form an elastic, openable and closable oil nozzle. This oil nozzle is detachably installed on the housing, allowing for oil filling without disassembly, making the operation convenient and quick.

[0009] Optionally, the inner cylinder is a stepped inner cylinder, and the inner cylinder is completely located inside the shell, and the central axis of the inner cylinder is on the same straight line as the central axis of the outer cylinder.

[0010] The central axis of the inner cylinder is aligned with the central axis of the outer cylinder to facilitate rapid assembly.

[0011] Optionally, the spring is a metal spring, and the sealing ball is a steel sealing ball.

[0012] The use of metal springs and sealing balls ensures a relatively long service life.

[0013] Optionally, the housing includes a front cover and a head cover, the front cover and the head cover being detachably fitted together, the mounting screw hole being formed on the front cover, and the gear being located in the cavity formed by the front cover and the head cover.

[0014] Optionally, an output shaft is rotatably mounted on the front cover, and the gear is provided on the output shaft.

[0015] Optionally, a protective cover is provided at one end of the front cover.

[0016] Optionally, the inner diameter of the outer cylinder is larger than the diameter of the sealing ball.

[0017] The inner diameter of the outer cylinder is larger than the diameter of the sealing ball to ensure that lubricating grease can be smoothly added.

[0018] An angle grinder includes the oiling structure described above, wherein a grinding disc is mounted on the output shaft and the grinding disc is located outside the front cover.

[0019] The beneficial effects of this utility model are: an elastic, openable and closable oil nozzle is formed by the outer cylinder, inner cylinder, spring and sealing ball. The oil nozzle is detachably installed on the housing, and oil filling can be achieved without disassembly through the oil nozzle, which is convenient and quick to operate. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0021] Figure 1 This is a schematic diagram showing the fit between the inner and outer cylinders; Figure 2 This is a simplified schematic diagram of an angle grinder. Figure 3 yes Figure 2 A simplified cross-sectional diagram along the AA direction.

[0022] The figures are labeled as follows: 1. Outer cylinder; 101. Sealing surface; 2. Sealing ball; 3. Spring; 4. Inner cylinder; 5. Head shell; 501. Mounting screw hole; 6. Front cover; 7. Protective cover; 8. Output shaft; 9. Grinding disc; 10. Gear. Detailed Implementation

[0023] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0024] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0025] In the description of this application, it should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. For ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings. Example 1

[0026] As attached Figure 1 Appendix Figure 2 and appendix Figure 3 As shown, an oil filling structure includes a housing with a gear inside, an inner cylinder 4, an outer cylinder 1, a spring 3, and a sealing ball 2. The housing has a mounting screw hole 501, the outer cylinder 1 is mounted on the mounting screw hole 501, the inner cylinder 4 is detachably disposed at one end of the outer cylinder 1, the other end of the outer cylinder 1 is provided with a sealing surface 101, the sealing ball 2 is slidably disposed inside the outer cylinder 1, the spring 3 is disposed inside the outer cylinder 1, one end of the spring 3 abuts against the sealing ball 2, and the other end of the spring 3 abuts against the inner cylinder 4. The sealing surface 101 is arc-shaped and is used to fit tightly against the sealing ball 2.

[0027] In this type of oil filling structure, the outer cylinder 1 is detachably installed on the mounting screw hole 501 by installing screw hole 501 on the housing. When it is necessary to inspect the space inside the housing, the outer cylinder 1 can be removed from the mounting screw hole 501 on the housing, so that the condition inside the housing can be observed through the mounting screw hole 501.

[0028] Meanwhile, in this type of oil injection structure, the inner cylinder 4, outer cylinder 1, spring 3, and sealing ball 2 form an elastic, openable and closable oil nozzle. When the oil nozzle is installed on the mounting screw hole 501, a part of the outer cylinder 1 is located outside the housing. When oil needs to be injected into the housing through the oil nozzle, the oil injection needle of the external device squeezes the sealing ball 2, so that the sealing ball 2 is no longer tightly attached to the arc-shaped sealing surface 101. When the sealing ball 2 is no longer tightly attached to the arc-shaped sealing surface 101, the sealing ball 2 no longer blocks the outer cylinder 1. At this time, the oil can seep into the housing through the outer cylinder 1. When it is necessary to stop the oil injection, under the elastic force of the spring 3, the sealing ball 2 moves back and re-attaches tightly to the cover 101. When the sealing ball 2 re-attaches tightly to the cover 101, the sealing ball 2 re-blocks the outer cylinder 1, so that the entire oil nozzle is re-sealed.

[0029] In this type of oil filling structure, under normal conditions, the sealing ball 2 is tightly attached to the cover 101. Therefore, under normal conditions, the oil nozzle is in a closed state. Only when an external object pushes the sealing ball 2 into the shell will the sealing ball 2 not block the outer cylinder 1.

[0030] In summary, in this type of oil filling structure, an elastic, openable and closable oil nozzle is formed by the outer cylinder 1, the inner cylinder 4, the spring 3, and the sealing ball 2. The oil nozzle is detachably installed on the housing, and oil filling can be achieved without disassembly through the oil nozzle, making the operation convenient and quick.

[0031] As attached Figure 1 Appendix Figure 2 and appendix Figure 3 As shown, the inner cylinder 4 is a stepped inner cylinder 4, and the inner cylinder 4 is completely located inside the shell, and the central axis of the inner cylinder 4 is on the same straight line as the central axis of the outer cylinder 1.

[0032] The central axis of the inner cylinder 4 is aligned with the central axis of the outer cylinder 1 to facilitate rapid assembly.

[0033] As attached Figure 1 Appendix Figure 2 and appendix Figure 3 As shown, spring 3 is made of metal, and sealing ball 2 is made of steel.

[0034] The use of a metal spring 3 and a sealing ball 2 is to ensure a relatively long service life.

[0035] As attached Figure 1 Appendix Figure 2 and appendix Figure 3 As shown, the housing includes a front cover 6 and a head shell 5, which are detachably fitted together. A mounting screw hole 501 is provided on the front cover 6, and the gear 10 is located in the cavity formed by the front cover 6 and the head shell 5.

[0036] As attached Figure 1 Appendix Figure 2 and appendix Figure 3 As shown, an output shaft 8 is rotatably mounted on the front cover 6, and a gear 10 is provided on the output shaft 8.

[0037] As attached Figure 1 Appendix Figure 2 and appendix Figure 3 As shown, a protective cover 7 is provided at one end of the front cover 6.

[0038] As attached Figure 1 Appendix Figure 2 and appendix Figure 3 As shown, the inner diameter of the outer cylinder 1 is larger than the diameter of the sealing ball 2.

[0039] The inner diameter of the outer cylinder 1 is larger than the diameter of the sealing ball 2 to ensure that the lubricating grease can be smoothly injected. Example 2

[0040] An angle grinder includes an oiling structure as shown in Embodiment 1, with a grinding disc 10 mounted on an output shaft 8, the grinding disc 10 being located outside the front cover.

[0041] The above-described embodiments only illustrate some aspects of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An oil injection structure comprising a housing in which a gear is provided, characterized by, It also includes an inner cylinder, an outer cylinder, a spring, and a sealing ball. The housing has a mounting screw hole, and the outer cylinder is installed in the mounting screw hole. The inner cylinder is detachably disposed at one end of the outer cylinder, and the other end of the outer cylinder has a sealing surface. The sealing ball is slidably disposed in the outer cylinder, and the spring is disposed in the outer cylinder. One end of the spring abuts against the sealing ball, and the other end of the spring abuts against the inner cylinder. The sealing surface is arc-shaped and is used to fit tightly against the sealing ball.

2. The oil injection structure according to claim 1, wherein The inner cylinder is a stepped inner cylinder, and the inner cylinder is completely located inside the shell, and the central axis of the inner cylinder is on the same straight line as the central axis of the outer cylinder.

3. The oil injection structure according to claim 1, wherein The spring is a metal spring, and the sealing ball is a steel sealing ball.

4. The oil injection structure according to claim 1, wherein The housing includes a front cover and a head cover, which are detachably fitted together. The mounting screw hole is formed on the front cover, and the gear is located in the cavity formed by the front cover and the head cover.

5. An oil injection structure according to claim 4, wherein An output shaft is rotatably mounted on the front cover, and the gear is provided on the output shaft.

6. The oil injection structure according to claim 4, wherein A protective cover is provided at one end of the front cover.

7. The oil injection structure according to claim 1, wherein The inner diameter of the outer cylinder is larger than the diameter of the sealing ball.

8. An angle grinder characterized in that, Including the oil injection structure as described in any one of claims 1 to 7.

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