CN212706598U - Electric hammer, electric hammer drill output shaft antifriction structure and electric hammer, electric hammer drill - Google Patents
Electric hammer, electric hammer drill output shaft antifriction structure and electric hammer, electric hammer drill Download PDFInfo
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- CN212706598U CN212706598U CN202020862015.XU CN202020862015U CN212706598U CN 212706598 U CN212706598 U CN 212706598U CN 202020862015 U CN202020862015 U CN 202020862015U CN 212706598 U CN212706598 U CN 212706598U
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- electric hammer
- output shaft
- ball bearing
- antifriction structure
- bearing
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Abstract
The utility model discloses an electric hammer, electric hammer drill output shaft antifriction structure and electric hammer, electric hammer drill, this antifriction structure sets up between output shaft subassembly and shell fixing base, and antifriction structure includes ball bearing or roller bearing and plain washer, and ball bearing or ball bearing cover are established on the main shaft of output shaft subassembly is close to the axle head of shell fixing base, and the plain washer sets up between ball bearing or roller bearing and shell fixing base; the ball bearing or the roller bearing comprises a retainer and a plurality of rollers or balls, and the balls or the rollers can freely rotate in the retainer. The utility model discloses a ball bearing or roller bearing set up the output shaft between output shaft subassembly and shell fixing base, with the cooperation form of output shaft subassembly and shell fixing base, become point-face contact by face-face contact, reduced frictional force to reduce energy loss, promoted electric hammer, electric hammer rig ware life-span.
Description
Technical Field
The utility model belongs to the technical field of strike electric hammer, electric hammer and bore, especially, relate to an electric hammer, electric hammer bore output shaft antifriction structure and electric hammer, electric hammer and bore.
Background
For the electric hammer and the electric hammer drill, a rotatable output shaft assembly is supported between the front portion and the rear portion of a shell, gaps exist between the output shaft assembly and the front portion and the rear portion of the shell in the axial direction, in the process of using the electric hammer, zero matching can be formed between the output shaft assembly and the rear portion of the shell through force, friction force can be generated between the output shaft assembly and parts on the rear portion of the shell in the rotating process, the friction force can enable the power of the electric hammer to be increased, and energy consumption is increased.
SUMMERY OF THE UTILITY MODEL
The utility model provides an electric hammer, electric hammer bore output shaft antifriction structure and electric hammer, electric hammer and bore adopts ball bearing or roller bearing to set up the output shaft between output shaft subassembly and shell fixing base, with the cooperation form of output shaft subassembly and shell fixing base, becomes point-surface contact by face-surface contact, has reduced frictional force to reduce energy loss has promoted electric hammer, electric hammer rig ware life-span.
In order to solve the above problem, the technical scheme of the utility model is that:
an electric hammer and an electric hammer drill output shaft antifriction structure are provided, the antifriction structure is arranged between an output shaft assembly and a housing fixing seat, the antifriction structure comprises a ball bearing or a roller bearing and a flat gasket, the ball bearing or the roller bearing is sleeved on the shaft end of a main shaft of the output shaft assembly, which is close to the housing fixing seat, and the flat gasket is arranged between the ball bearing or the roller bearing and the housing fixing seat;
wherein the ball bearing or roller bearing comprises a retainer and a plurality of rollers or balls, and the rollers or rollers can freely rotate in the retainer.
Preferably, since the output shaft is rotatable, and a radial friction force is also generated due to the fact that a gap is inevitably formed in the radial direction, the anti-friction structure further comprises a needle bearing, and the needle bearing is arranged in the housing fixing seat and used for reducing the radial friction force of the output shaft.
Preferably, the electric hammer and the electric hammer drill are both direct-current electric hammers and direct-current electric hammer drills.
The utility model also provides an electric hammer, electric hammer bore, electric hammer bore output shaft antifriction structure in above-mentioned content.
The utility model discloses owing to adopt above technical scheme, make it compare with prior art and have following advantage and positive effect:
the utility model discloses design a special ball bearing or roller bearing and plain washer between rotatable output shaft and shell fixing base, this special ball bearing or roller bearing only have holder and ball or roller, and ball or roller can keep rolling in the holder, and do not drop from the holder, and when the machine work (for example drilling), the output shaft subassembly can produce a rotatory power and pressure and exert on the steel ball, become point-surface contact with the face-surface contact between original output shaft and the fixing base, the coefficient of friction of point-surface contact is lower a lot for face-surface contact. Therefore, the utility model discloses the sphere that utilizes the ball rolls on gasket and output shaft subassembly and reaches the effect that reduces frictional force to reduce energy loss has promoted machine life.
Drawings
Fig. 1 is a first schematic diagram of an output shaft antifriction structure of the utility model;
fig. 2 is a schematic diagram two of the output shaft antifriction structure of the present invention.
Description of reference numerals: 1-an output shaft assembly; 2-ball bearings; 201-a cage; 202-rolling balls; 3-housing fixing base; 4-flat gasket; 5-needle bearing.
Detailed Description
The following provides an electric hammer, an electric hammer drill output shaft antifriction structure and an electric hammer, an electric hammer drill, and a further detailed description thereof with reference to the accompanying drawings and specific embodiments. The advantages and features of the present invention will become more fully apparent from the following description and appended claims.
For the electric hammer and the electric hammer drill, a rotatable output shaft assembly is supported between the front part and the rear part (a shell fixing seat) of a shell, a gap exists between the output shaft assembly and the front part and the rear part of the shell in the axial direction, in the process of using the electric hammer, zero matching can be formed between the output shaft assembly and the shell fixing seat through force, friction force is generated between the output shaft assembly and the shell fixing seat in the rotating process, the friction force can enable the power of the electric hammer to rise, and energy consumption is increased. With the wide application of direct current type electric hammer tools, the single use time of the battery pack needs to be prolonged to improve the competitiveness of products.
The effect of promoting single live time through promoting the capacity of battery package is instant, but need pay higher cost as the cost, because frictional force is big simultaneously, can accelerate the wearing and tearing of part, reduces the life-span of machine. Therefore, the utility model discloses remove the design from the mechanical structure side and reduce frictional force, the structure of land energy loss and promotion machine life-span.
Example 1
Referring to fig. 1 and fig. 2, the embodiment provides an electric hammer, an output shaft antifriction structure of an electric hammer drill, the antifriction structure is arranged between an output shaft assembly 1 and a housing fixing seat 3, the antifriction structure includes a ball bearing 2 or a roller bearing and a flat gasket 4 (in the embodiment, the antifriction structure is the ball bearing 2 and the flat gasket 4, and the roller bearing can achieve the same effect), the ball bearing 2 or the ball bearing 2 is sleeved on a shaft end of a main shaft of the output shaft assembly 1 close to the housing fixing seat 3, and the flat gasket 4 is arranged between the ball bearing 2 or the roller bearing and the housing fixing seat 3;
the ball bearing 2 or roller bearing includes a retainer 201 and a plurality of balls 202, and the balls 202 can rotate freely in the retainer 201.
In the embodiment, a special ball 202 bearing 2 and a flat gasket 4 are designed between a rotatable output shaft and a housing fixing seat 3, the special ball 202 bearing 2 only comprises a retainer 201 and a ball 202, the special ball 202 bearing 2 is sleeved at one end, close to the housing fixing seat 3, of a main shaft in an output shaft assembly 1 and is in clearance fit with the main shaft, the ball 202 can keep rolling in the retainer 201 and does not fall off from the retainer 201, and the effect of reducing friction force is achieved by rolling the spherical surface of the ball 202 on the gasket and the output shaft assembly 1, so that energy loss is reduced, and the service life of a machine is prolonged.
In the preferred embodiment, since the output shaft is rotatable, and a radial friction force is also generated due to the radial clearance, the antifriction structure further includes a needle bearing 5, and the needle bearing 5 is disposed in the housing fixing base 3, i.e., the bearing chamber in the housing fixing base, and is used for reducing the radial friction force of the output shaft assembly 1.
Preferably, the electric hammer and the electric hammer drill are both direct-current electric hammers and direct-current electric hammer drills.
Example 2
An electric hammer and an electric hammer drill comprise an electric hammer and an electric hammer drill output shaft antifriction structure in embodiment 1.
In the embodiment, an antifriction structure is arranged between the output shaft assembly 1 and the housing fixing seat 3, the antifriction structure is specifically composed of a special ball 202 bearing 2, a gasket and a needle roller bearing 5, the special ball 202 bearing 2 is composed of only a retainer 201 and a plurality of balls 202, the balls 202 can freely rotate in the retainer 201 and do not fall off from the retainer 201, when the machine works (such as drilling), the output shaft assembly 1 can generate a rotating force and pressure to be applied to the steel balls, the original surface-surface contact between the output shaft and the fixing seat is changed into point-surface contact, the friction coefficient of the point-surface contact is much lower than that of the surface-surface contact, and meanwhile, the needle roller bearing 5 is adopted in the radial direction, so that the function of reducing the radial friction is also achieved. Therefore, the energy loss of the machine is reduced, the service life of the machine is prolonged, and the competitiveness of the electric hammer and the electric hammer drill is improved.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments. Even if various changes are made to the present invention, the changes still fall within the scope of the present invention if they fall within the scope of the claims and their equivalents.
Claims (4)
1. An electric hammer and an electric hammer drill output shaft antifriction structure are characterized in that the antifriction structure is arranged between an output shaft assembly and a shell fixing seat, the antifriction structure comprises a ball bearing or a roller bearing and a flat gasket, the ball bearing or the ball bearing is sleeved on the shaft end, close to the shell fixing seat, of a main shaft of the output shaft assembly, and the flat gasket is arranged between the ball bearing or the roller bearing and the shell fixing seat;
wherein the ball bearing or roller bearing comprises a retainer and a plurality of rollers or balls, and the rollers or rollers can freely rotate in the retainer.
2. The electric hammer and electric hammer drill output shaft antifriction structure of claim 1, characterized in that the antifriction structure further comprises a needle bearing, the needle bearing is arranged in the housing fixing seat and is used for reducing the radial friction force of the output shaft.
3. The electric hammer and electric hammer drill output shaft antifriction structure of claim 1, characterized in that the electric hammer and electric hammer drill are both direct current electric hammers and electric hammer drills.
4. An electric hammer and an electric hammer drill, which are characterized by comprising the electric hammer and the electric hammer drill output shaft antifriction structure according to any one of claims 1 to 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020862015.XU CN212706598U (en) | 2020-05-21 | 2020-05-21 | Electric hammer, electric hammer drill output shaft antifriction structure and electric hammer, electric hammer drill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020862015.XU CN212706598U (en) | 2020-05-21 | 2020-05-21 | Electric hammer, electric hammer drill output shaft antifriction structure and electric hammer, electric hammer drill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212706598U true CN212706598U (en) | 2021-03-16 |
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ID=74945975
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020862015.XU Active CN212706598U (en) | 2020-05-21 | 2020-05-21 | Electric hammer, electric hammer drill output shaft antifriction structure and electric hammer, electric hammer drill |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212706598U (en) |
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2020
- 2020-05-21 CN CN202020862015.XU patent/CN212706598U/en active Active
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