Eccentric shaft mounting structure and electric hammer

Abstract

The utility model discloses an eccentric shaft mounting structure, including the casing, the eccentric shaft is arranged in the casing and slides, the cavity is arranged in the eccentric shaft, the spring is arranged in the cavity, the eccentric shaft one end is provided with the oil leak hole, the oil leak hole intercommunication the space in the cavity and the casing, still include felt piece, the felt piece sets up in the cavity, and felt piece is located the orifice at the oil leak hole, and the spring is against the felt piece. The application also discloses electric hammer including above-mentioned eccentric shaft mounting structure.

Description

Technical Field

[0001] This utility model relates to the field of power tools, and in particular to an eccentric shaft mounting structure and an electric hammer. Background Technology

[0002] Electric hammers are a commonly used type of power tool. Patent publication CN213054659U discloses an electric hammer structure in which an oil leakage hole is provided on the side where the eccentric shaft contacts the spring. Lubricating oil leaks from this hole to lubricate the relevant gear structure. However, no corresponding components are provided at the oil leakage hole to control the leakage rate. Therefore, this type of electric hammer structure is prone to excessively rapid lubricating oil loss during use, resulting in relatively poor reliability. Utility Model Content

[0003] To address the aforementioned problems, this invention proposes an eccentric shaft mounting structure. By placing a felt sheet at the opening of the oil leakage hole, the oil absorption effect of the felt sheet is utilized to achieve ventilation and slow release of lubricating oil, thus enabling long-lasting lubrication of the equipment inside the eccentric shaft cavity.

[0004] The technical solution adopted by this utility model is as follows:

[0005] An eccentric shaft mounting structure includes a housing, an eccentric shaft slidably disposed within the housing, a cavity within the eccentric shaft, a spring disposed within the cavity, an oil leakage hole at one end of the eccentric shaft connecting the cavity to the space within the housing, and a felt sheet disposed within the cavity and positioned at the opening of the oil leakage hole, with the spring pressing against the felt sheet.

[0006] In this type of eccentric shaft mounting structure, a felt sheet is placed near the oil drain hole in the cavity. The felt sheet can absorb lubricating grease and slowly release the lubricating grease material. The presence of the felt sheet does not affect the ventilation performance of the oil drain hole. In this way, the gas in the housing can be discharged through the oil drain hole. After oil from other equipment in the housing enters the oil drain hole, it can be absorbed by the felt sheet and then slowly released into the cavity of the eccentric shaft, thereby lubricating the equipment in the cavity. Since the felt sheet can slowly release the lubricating oil, the lubrication effect can be ensured for a long time.

[0007] In summary, this installation structure achieves ventilation and slow release of lubricating oil by placing a felt sheet at the opening of the oil leakage hole and utilizing the oil absorption effect of the felt sheet, thus realizing long-term lubrication of the equipment inside the eccentric shaft cavity.

[0008] Optionally, the oil leakage hole is a frustum-shaped oil leakage hole, and the narrow end of the oil leakage hole is located on one side of the cavity.

[0009] The use of a frustum-shaped oil drain hole, with the narrow end of the drain hole located on one side of the cavity, ensures that the lubricating oil can slowly permeate into the cavity of the eccentric shaft.

[0010] Optionally, a skeleton oil seal is also included, which is sleeved on the eccentric shaft and is used to seal the gap between the eccentric shaft and the housing.

[0011] Optionally, the skeleton oil seal is a skeleton oil seal made of fluororubber.

[0012] The function of the skeleton oil seal is to seal between the housing and the eccentric shaft, ensuring that the lubricating oil can only slowly seep into the cavity through the oil leakage hole.

[0013] Optionally, it also includes a gear, which is sleeved and fitted together with the eccentric shaft. The gear is provided with a mating hole, and a linkage pin is slidably provided at one end of the eccentric shaft, with the spring pressing against the linkage pin.

[0014] When the linkage pin engages with the gear's mating hole, the gear and eccentric shaft are linked; when the linkage pin does not engage with the gear's mating hole, the gear and eccentric shaft are not linked.

[0015] Optionally, it also includes a torsion bar and a top pin. The torsion bar is rotatably mounted on the housing, and the top pin is slidably engaged with the cavity of the eccentric shaft. One end of the top pin contacts the linkage pin, and the other end of the top pin contacts the torsion bar.

[0016] The function of the torsion bar is to drive the top pin to move. When the torsion bar drives the top pin to move, it can drive the top pin to move, which in turn drives the linkage pin to move, thereby changing the fit between the linkage pin and the mating hole on the gear.

[0017] Optionally, the toggle lever contacts the top pin through its own inclined surface, a limit pin is slidably provided on the housing, and a limit ring groove is provided on the toggle lever, the limit ring groove being used to cooperate with the limit pin.

[0018] The lubricating oil flowing into the cavity of the eccentric shaft can lubricate the top pin and the linkage pin.

[0019] The limiting pin and the limiting ring groove work together to prevent the torsion bar from falling off the housing.

[0020] Optionally, a limiting slide is provided on the eccentric shaft, and the linkage pin is slidably disposed within the limiting slide.

[0021] The function of the limit slide is to ensure that the linkage pin can slide smoothly and that the linkage pin will not get stuck when moving.

[0022] An electric hammer includes an eccentric shaft mounting structure as described above.

[0023] The beneficial effects of this utility model are: by setting a felt sheet at the opening of the oil leakage hole, the oil absorption effect of the felt sheet is used to achieve ventilation and slow release of lubricating oil, thus achieving long-lasting lubrication of the equipment inside the eccentric shaft cavity. Attached Figure Description

[0024] 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.

[0025] Figure 1 This is a simplified schematic diagram of the battery mounting structure;

[0026] Figure 2 yes Figure 1 A simplified enlarged diagram of point A in the middle;

[0027] Figure 3 yes Figure 1 A simplified enlarged diagram of point B in the middle;

[0028] Figure 4 This is a schematic diagram showing the fit between the eccentric shaft and the top pin;

[0029] Figure 5 This is a schematic diagram of the fit between the eccentric shaft and the gear.

[0030] The attached figures are labeled as follows: 1. Housing; 2. Spring; 3. Oil seal; 4. Eccentric shaft; 401. Oil leakage hole; 402. Cavity; 403. Limiting slide; 5. Linkage pin; 6. Top pin; 7. Limiting pin; 8. Torque lever; 801. Limiting ring groove; 9. Adhesive piece; 10. Gear; 1001. Mating hole. Detailed Implementation

[0031] 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.

[0032] 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.

[0033] 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.

[0034] Example 1

[0035] As attached Figure 1 Appendix Figure 2 Appendix Figure 3 Appendix Figure 4 and appendix Figure 5 As shown, an eccentric shaft 4 mounting structure includes a housing, an eccentric shaft 4 slidably disposed within the housing, a cavity 402 disposed within the eccentric shaft 4, a spring 2 disposed within the cavity 402, an oil leakage hole 401 opened at one end of the eccentric shaft 4, the oil leakage hole 401 connecting the cavity 402 and the space inside the housing, and also includes a felt sheet disposed within the cavity 402, with the felt sheet located at the opening of the oil leakage hole 401, and the spring 2 abutting against the felt sheet.

[0036] In this type of eccentric shaft 4 mounting structure, a felt sheet is placed near the oil drain hole 401 in the cavity 402. The felt sheet can absorb lubricating grease and slowly release the lubricating grease material. The presence of the felt sheet does not affect the ventilation performance of the oil drain hole 401. In this way, the gas in the housing can be discharged through the oil drain hole 401. After the oil from other equipment in the housing enters the oil drain hole 401, it can be absorbed by the felt sheet and then slowly released into the cavity of the eccentric shaft 4, thereby lubricating the equipment in the cavity. Since the felt sheet can slowly release the lubricating oil, the lubrication effect can be ensured for a long time.

[0037] In summary, in this installation structure, by setting a felt sheet at the opening of the oil leakage hole 401, the oil absorption effect of the felt sheet 9 is used to achieve ventilation and slow release of lubricating oil, thus achieving long-lasting lubrication of the equipment inside the cavity 402 of the eccentric shaft 4.

[0038] As attached Figure 1 Appendix Figure 2 Appendix Figure 3 Appendix Figure 4 and appendix Figure 5As shown, the oil leakage hole 401 is a frustum-shaped oil leakage hole 401, and the narrow end of the oil leakage hole 401 is located on one side of the cavity 402.

[0039] The use of a frustum-shaped oil drain hole 401, with the narrow end of the oil drain hole 401 located on one side of the cavity 402, ensures that the lubricating oil can slowly permeate into the cavity 402 of the eccentric shaft 4.

[0040] As attached Figure 1 Appendix Figure 2 Appendix Figure 3 Appendix Figure 4 and appendix Figure 5 As shown, it also includes a skeleton oil seal 3, which is sleeved on the eccentric shaft 4 and is used to seal the gap between the eccentric shaft 4 and the housing.

[0041] As attached Figure 1 Appendix Figure 2 Appendix Figure 3 Appendix Figure 4 and appendix Figure 5 As shown, the skeleton oil seal 3 is a skeleton oil seal made of fluororubber.

[0042] The function of the skeleton oil seal 3 is to seal between the housing and the eccentric shaft 4, ensuring that the lubricating oil can only slowly seep into the cavity 402 through the oil leakage hole 401.

[0043] As attached Figure 1 Appendix Figure 2 Appendix Figure 3 Appendix Figure 4 and appendix Figure 5 As shown, it also includes a gear 10, which is fitted together with the eccentric shaft 4. The gear 10 is provided with a mating hole 1001, and a linkage pin 5 is slidably provided at one end of the eccentric shaft 4. The spring 2 abuts against the linkage pin 5.

[0044] When the linkage pin 5 engages with the mating hole 1001 of the gear 10, the gear 10 and the eccentric shaft 4 are linked. When the linkage pin 5 does not engage with the mating hole 1001 of the gear 10, the gear 10 and the eccentric shaft 4 are not linked.

[0045] As attached Figure 1 Appendix Figure 2 Appendix Figure 3 Appendix Figure 4 and appendix Figure 5 As shown, it also includes a torsion bar 8 and a top pin 6. The torsion bar 8 is rotatably mounted on the housing, and the top pin 6 is slidably engaged with the cavity 402 of the eccentric shaft 4. One end of the top pin 6 is in contact with the linkage pin 5, and the other end of the top pin 6 is in contact with the torsion bar 8.

[0046] The function of the torsion lever 8 is to drive the top pin 6 to move. When the torsion lever 8 drives the top pin 6 to move, it can drive the top pin 6 to move. The movement of the top pin 6 can drive the movement of the linkage pin 5, thereby changing the engagement state between the linkage pin 5 and the mating hole 1001 on the gear 10.

[0047] As attached Figure 1 Appendix Figure 2 Appendix Figure 3 Appendix Figure 4 and appendix Figure 5 As shown, the toggle lever 8 contacts the top pin 6 through its own inclined surface, a limit pin 7 is slidably provided on the housing, and a limit ring groove 801 is provided on the toggle lever 8, which is used to cooperate with the limit pin 7.

[0048] Specifically, the lubricating oil flowing into the cavity 402 of the eccentric shaft 4 can lubricate the top pin 6 and the linkage pin 5.

[0049] The limiting pin 7 cooperates with the limiting ring groove 801 to prevent the torsion bar 8 from falling off the housing.

[0050] As attached Figure 1 Appendix Figure 2 Appendix Figure 3 Appendix Figure 4 and appendix Figure 5 As shown, a limiting slide 403 is provided on the eccentric shaft 4, and the linkage pin 5 is slidably disposed in the limiting slide 403.

[0051] The function of the limit slide 403 is to ensure that the linkage pin 5 can slide smoothly and that the linkage pin 5 will not get stuck when it moves.

[0052] Example 2

[0053] An electric hammer includes an eccentric shaft mounting structure as shown in Embodiment 1.

[0054] 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 eccentric shaft mounting structure, comprising a housing, an eccentric shaft slidably disposed within the housing, a cavity provided within the eccentric shaft, a spring disposed within the cavity, and an oil leakage hole provided at one end of the eccentric shaft, the oil leakage hole connecting the cavity to the space within the housing, characterized in that... It also includes a felt sheet, which is disposed in the cavity and located at the opening of the oil leakage hole, and the spring abuts against the felt sheet.

2. The eccentric shaft mounting structure according to claim 1, characterized in that, The oil leakage hole is a frustum-shaped oil leakage hole, and the narrow end of the oil leakage hole is located on one side of the cavity.

3. The eccentric shaft mounting structure according to claim 1, characterized in that, It also includes a skeleton oil seal, which is sleeved on the eccentric shaft and is used to seal the gap between the eccentric shaft and the housing.

4. The eccentric shaft mounting structure according to claim 3, characterized in that, The skeleton oil seal is a skeleton oil seal made of fluororubber.

5. The eccentric shaft mounting structure according to claim 1, characterized in that, It also includes a gear, which is fitted together with the eccentric shaft. The gear has a mating hole, and a linkage pin is slidably provided at one end of the eccentric shaft. The spring abuts against the linkage pin.

6. The eccentric shaft mounting structure according to claim 5, characterized in that, It also includes a torsion bar and a top pin. The torsion bar is rotatably mounted on the housing. The top pin is slidably engaged with the cavity of the eccentric shaft. One end of the top pin contacts the linkage pin, and the other end of the top pin contacts the torsion bar.

7. The eccentric shaft mounting structure according to claim 6, characterized in that, The toggle lever contacts the top pin through its own inclined surface. A limit pin is slidably provided on the housing. A limit ring groove is provided on the toggle lever. The limit ring groove is used to cooperate with the limit pin.

8. The eccentric shaft mounting structure according to claim 5, characterized in that, A limiting slide is provided on the eccentric shaft, and the linkage pin is slidably disposed within the limiting slide.

9. An electric hammer, characterized in that, Includes the eccentric shaft mounting structure as described in any one of claims 1 to 8.

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