Piston mounting structure and electric hammer

Abstract

The utility model discloses a piston installation structure which comprises a shell and a piston, a sliding way is arranged in the shell, the piston and the shell are matched together in a sliding and sealing mode, a through hole is formed in the piston, two hole openings of the through hole are both in contact with the sliding way, the through hole is filled with lubricating grease, and the piston is arranged in the sliding way. The through hole is perpendicular to the sliding direction of the piston. According to the structure, the piston is provided with the through hole, the through hole is filled with the lubricating grease, the lubricating grease flowing into the sliding way can achieve the cooling effect on the shell and the piston and can achieve the lubricating effect, and abrasion of the piston and the shell is reduced. The utility model further discloses the electric hammer comprising the mounting structure.

Description

Technical Field

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

[0002] Hammer-type power tools are currently a common type of tool. Patent publication CN108705490A discloses a hammer-type power tool. The structure of hammer-type tools is basically as shown in this document, namely a housing, a motor, a hammer head (or a pick head), and a piston. The piston is in a sliding installation state and is roughly cylindrical. A soft rubber sealing plug is fitted on the piston. During the operation of this type of tool, the piston will continuously rub against the housing. During the friction process, the temperature of the piston and part of the inner wall of the housing will continuously rise. The temperature rise will cause the grease between the two to continuously evaporate, and the wear between the piston and the housing will increase, and the rubber ring used for sealing will age faster. Utility Model Content

[0003] To address the aforementioned problems, this invention proposes a piston mounting structure. By opening a through hole on the piston and filling the through hole with lubricating grease, the lubricating grease flowing into the slide can both cool the housing and the piston and provide lubrication, thereby reducing wear on the piston and the housing.

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

[0005] A piston mounting structure includes a housing and a piston. A slide rail is provided inside the housing. The piston is slidably sealed with the housing. A through hole is provided on the piston. Both openings of the through hole are in contact with the slide rail. The through hole is filled with lubricating grease and is perpendicular to the sliding direction of the piston.

[0006] In this piston mounting structure, a slide rail is provided on the housing, and the piston is slidably mounted in the slide rail of the housing. Since a through hole is provided on the piston, and both openings of the through hole are in contact with the slide rail, and the through hole is filled with lubricating grease, the lubricating grease located in the through hole can continuously flow into the slide rail during the piston's sliding process. The lubricating grease flowing into the slide rail can lubricate the piston and the housing. The lubricating grease flowing into the slide rail can cool the housing and piston and also lubricate them, reducing wear on the piston and the housing.

[0007] In summary, in this piston mounting structure, by opening a through hole on the piston and filling the through hole with lubricating grease, the lubricating grease flowing into the slide can both cool the housing and the piston and provide lubrication, thereby reducing wear on the piston and the housing.

[0008] Optionally, a sealing ring is also included, which is fitted onto the piston and located between the piston and the housing.

[0009] The function of the sealing ring is to seal the space between the piston and the housing. Specifically, the sealing ring is fitted onto the groove of the piston.

[0010] Optionally, it also includes a connecting rod and a motor, one end of the connecting rod being coupled to the piston, and the other end of the connecting rod being coupled to the motor shaft.

[0011] The connecting rod acts as a link between the motor and the piston, with the motor's rotation causing the piston to slide within the slide.

[0012] Optionally, the piston has a mounting hole, one end of the connecting rod is located in the mounting hole, and the mounting hole is in communication with the through hole.

[0013] The piston has a mounting hole that is connected to the through hole. This not only allows the lubricating grease in the through hole to flow into the mounting hole to lubricate the connection between the piston and the connecting rod, ensuring a more stable fit between the connecting rod and the piston, but also ensures that air can pass between the mounting hole and the through hole. This reduces the air resistance encountered by the piston during operation and ensures that the piston slides more smoothly in the slideway.

[0014] Optionally, a connecting pin is also included. The piston has a pin hole that is in communication with the mounting hole. The connecting pin is rotatably disposed in the pin hole and is rotatably engaged with the connecting rod.

[0015] The function of the connecting pin is to connect the connecting rod and the piston together. Since the pin hole is connected to the mounting hole and the through hole is connected to the mounting hole, lubricating grease can overflow in each hole. This can achieve sufficient lubrication and overflow between the parts, and at the same time facilitate the piston to quickly exhaust air during sliding, reducing the air resistance when the piston is running.

[0016] Optionally, a steel sleeve is provided between the connecting rod and the rotating shaft.

[0017] Optionally, the piston is a cylindrical piston.

[0018] An electric hammer, comprising the piston mounting structure described above.

[0019] The beneficial effects of this utility model are: by opening a through hole on the piston and filling the through hole with lubricating grease, the lubricating grease flowing into the slide can both cool the shell and the piston and provide lubrication, thereby reducing wear on the piston and the shell. 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 simplified schematic diagram of the piston mounting structure.

[0022] The figures are labeled as follows: 1. Housing; 101. Slide rail; 2. Sealing ring; 3. Piston; 301. Through hole; 302. Pin hole; 303. Mounting hole; 4. Connecting pin; 5. Connecting rod; 6. Rotating shaft; 7. Steel sleeve. 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.

[0026] Example 1

[0027] As attached Figure 1As shown, a piston mounting structure includes a housing 1 and a piston 3. A slide 101 is provided inside the housing 1. The piston 3 is slidably sealed with the housing 1. A through hole 301 is provided on the piston 3. Both openings of the through hole 301 are in contact with the slide 101. The through hole 301 is filled with lubricating grease and is perpendicular to the sliding direction of the piston 3.

[0028] In this piston 3 mounting structure, a slide 101 is provided on the housing 1. The piston 3 is slidably mounted in the slide 101 of the housing 1. Since a through hole 301 is provided on the piston 3, and both openings of the through hole 301 are in contact with the slide 101, and the through hole 301 is filled with lubricating grease, the lubricating grease located in the through hole 301 can continuously flow into the slide 101 during the sliding process of the piston 3. The lubricating grease flowing into the slide 101 can lubricate the piston 3 and the housing 1. The lubricating grease flowing into the slide 101 can cool the housing 1 and the piston 3, and also lubricate them, reducing the wear of the piston 3 and the housing 1.

[0029] In summary, in this piston 3 mounting structure, by opening a through hole 301 on the piston 3 and filling the through hole 301 with lubricating grease, the lubricating grease flowing into the slide 101 can both cool the housing 1 and the piston 3 and provide lubrication, thereby reducing the wear of the piston 3 and the housing 1.

[0030] As attached Figure 1 As shown, it also includes a sealing ring 2, which is sleeved on the piston 3 and located between the piston 3 and the housing 1.

[0031] The function of the sealing ring 2 is to seal the piston 3 and the housing 1. Specifically, the sealing ring 2 is fitted onto the groove of the piston 3.

[0032] As attached Figure 1 As shown, it also includes a connecting rod 5 and a motor. One end of the connecting rod 5 is engaged with the piston 3, and the other end of the connecting rod 5 is engaged with the rotating shaft 6 of the motor.

[0033] The function of the connecting rod 5 is to link the motor and the piston 3. The operation of the motor drives the piston 3 to slide within the slide rail 101.

[0034] As attached Figure 1 As shown, the piston 3 has a mounting hole 303, and one end of the connecting rod 5 is located in the mounting hole 303. The mounting hole 303 and the through hole 301 are in a connected state.

[0035] The piston 3 has a mounting hole 303, which is connected to the through hole 301. This not only facilitates the flow of lubricating grease from the through hole 301 to the mounting hole 303 to lubricate the connection between the piston 3 and the connecting rod 5, ensuring a more stable fit between the connecting rod 5 and the piston 3, but also ensures that air can pass between the mounting hole 303 and the through hole 301, reducing the air resistance encountered by the piston 3 during operation and ensuring that the piston 3 slides more smoothly in the slide rail 101.

[0036] As attached Figure 1 As shown, it also includes a connecting pin 4. The piston 3 has a pin hole 302. The pin hole 302 is in communication with the mounting hole 303. The connecting pin 4 is rotatably disposed in the pin hole 302. The connecting pin 4 and the connecting rod 5 are rotatably engaged together.

[0037] The function of the connecting pin 4 is to connect the connecting rod 5 and the piston 3 together. Since the pin hole 302 is connected to the mounting hole 303 and the through hole 301 is connected to the mounting hole 303, lubricating grease can overflow in each hole. This can achieve sufficient lubrication and overflow between the parts, and at the same time facilitate the piston 3 to quickly exhaust air during sliding, reducing the air resistance of the piston 3 during operation.

[0038] As attached Figure 1 As shown, a steel sleeve 7 is provided between the connecting rod 5 and the rotating shaft 6.

[0039] As attached Figure 1 As shown, piston 3 is a cylindrical piston.

[0040] See appendix Figure 1 As described above, the through hole is perpendicular to the central axis of the piston, the sealing ring is located on one side of the through hole, and the mounting hole and pin hole are located on the other side of the through hole. The mounting hole is perpendicular to the through hole, and the pin hole is perpendicular to the mounting hole.

[0041] Example 2

[0042] An electric hammer includes a piston mounting structure as shown in Example 1.

[0043] 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. A piston mounting structure, comprising a housing and a piston, wherein a slide rail is provided within the housing, and the piston is slidably and sealingly fitted with the housing, characterized in that, The piston has a through hole, both openings of which are in contact with the slide rail. The through hole is filled with lubricating grease and is perpendicular to the sliding direction of the piston.

2. The piston mounting structure according to claim 1, characterized in that, It also includes a sealing ring, which is fitted onto the piston and located between the piston and the housing.

3. The piston mounting structure according to claim 1, characterized in that, It also includes a connecting rod and a motor, one end of which is engaged with the piston, and the other end of which is engaged with the motor shaft.

4. The piston mounting structure according to claim 3, characterized in that, The piston has a mounting hole, one end of the connecting rod is located in the mounting hole, and the mounting hole is in communication with the through hole.

5. A piston mounting structure according to claim 4, characterized in that, It also includes a connecting pin, on which a pin hole is provided, the pin hole is in communication with the mounting hole, the connecting pin is rotatably disposed in the pin hole, and the connecting pin is rotatably engaged with the connecting rod.

6. A piston mounting structure according to claim 3, characterized in that, A steel sleeve is provided between the connecting rod and the rotating shaft.

7. A piston mounting structure according to claim 1, characterized in that, The piston is cylindrical.

8. An electric hammer, characterized in that, Includes the piston mounting structure as described in any one of claims 1 to 7.

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