Oil storage lubrication transmission assembly and oscillating type handheld electric tool

Abstract

The utility model discloses an oil storage lubrication transmission assembly and an oscillation type hand-held electric tool, the oil storage lubrication transmission assembly comprises a bearing seat, a bearing arranged in the bearing seat and an eccentric shaft rotatably installed in the bearing seat through the bearing, the eccentric shaft is sleeved with a rotary body, the front end of the rotary body is provided with a shifting fork, and the shifting fork is connected with the bearing. Two free ends are symmetrically arranged at one end of the shifting fork, the rotary body is arranged between the two free ends in a matched mode, an oil storage seat coaxially and fixedly installed on the bearing seat is arranged outside the rotary body in a covering mode, and a strip-shaped groove with the length larger than the swing stroke of the shifting fork is formed in the front end of the oil storage seat. The other end of the shifting fork penetrates through the strip-shaped groove in a clearance mode and extends out of the oil storage base. The structure is simplified while oil storage and oil supply for a transmission structure are achieved, the manufacturing cost is reduced, meanwhile, installation is more concise, and assembling is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of electric tools, in particular to an oil storage lubrication transmission component and an oscillating handheld electric tool. Background Art

[0002] Handheld power tools refer to portable power tools that can be operated directly by hand without other auxiliary devices. They are classified according to the movement mode of the output end. The most widely used are rotary handheld power tools and oscillating handheld power tools, such as electric screwdrivers, electric spatulas, etc. Among them, the structure of rotary handheld power tools is relatively simple, and the output end is directly driven by the motor to rotate, while the oscillating handheld tool is driven by a motor to rotate an active unit, and then drives the driven unit to oscillate through the transmission structure, thereby realizing the oscillation of the output end.

[0003] The Chinese invention application with authorization publication number CN 106891303 B discloses a motor-driven handheld power tool. The overall drive mechanism has become the most widely used structure in the power tool market. In order to ensure that the transmission structure has a long service life and excellent performance, a lubricant device is provided on the outside of the transmission structure for receiving lubricant and then outputting the lubricant to the transmission structure.

[0004] Although the above-mentioned lubricant device plays a good role in improving the performance of the oscillating handheld power tool, its overall structure is complex and difficult to manufacture. In addition, it is difficult to assemble when installed in conjunction with multiple parts in the transmission structure, which makes the manufacturing cost of the entire power tool high. Utility Model Content

[0005] The purpose of this utility model is to address the shortcomings of the existing technology and propose an oil storage lubrication transmission component and an oscillating handheld power tool, which simplifies the structure and reduces manufacturing costs while storing oil and supplying oil to the transmission structure, and makes installation simpler and easier to assemble.

[0006] The technical solution to achieve the purpose of this utility model is:

[0007] An oil storage lubrication transmission assembly includes a bearing seat, a bearing arranged in the bearing seat, and an eccentric shaft rotatably installed in the bearing seat through the bearing, a rotating body is sleeved on the eccentric shaft, a shift fork is provided at the front end of the rotating body, two free ends are symmetrically provided at one end of the shift fork, the rotating body is cooperatively arranged between the two free ends, and an external cover is provided with an oil storage seat coaxially fixed to the bearing seat, a strip groove with a length greater than the swing stroke of the shift fork is opened at the front end of the oil storage seat, and the gap at the other end of the shift fork passes through the strip groove and extends to the outside of the oil storage seat.

[0008] Furthermore, a front end surface of the oil storage seat is provided with a plurality of screw holes, and screws that are tightened on the bearing seat are provided in the screw holes.

[0009] Furthermore, the strip groove passes through the oil storage seat axially, and the rear end of the oil storage seat is provided with arc grooves symmetrically located on both sides of the width direction of the strip groove. The front end of the inner ring of the bearing seat is provided with an annular convex portion, and the inner diameter of the annular convex portion is smaller than the inner diameter of the arc groove, thereby forming an oil storage groove with the arc groove.

[0010] An oscillating handheld power tool includes the oil storage and lubrication transmission assembly as described above and a first shell and a second shell fixedly connected. The first shell is provided with an active unit, and the second shell is provided with a driven unit perpendicular to the active unit. The active unit is connected to the driven unit through the oil storage and lubrication transmission assembly and is suitable for driving the driven unit to perform oscillating motion.

[0011] Furthermore, a wrench is fixedly provided on a side of the outer circumferential surface of the second housing away from the output end of the driven unit.

[0012] Furthermore, the second housing is provided with a downwardly recessed arc groove below the wrench, and the oil storage seat is provided with an arc notch corresponding to the arc groove.

[0013] Furthermore, the active unit is a fixed motor, the motor shaft of the motor is fixedly connected to the eccentric shaft, a fan blade is coaxially fixedly installed on the motor shaft between the motor and the eccentric shaft, and the first shell is provided with a heat dissipation groove arranged along the outer peripheral surface of the fan blade.

[0014] Furthermore, a balancing block is sleeved on the eccentric shaft and is located between the bearing and the rotating body.

[0015] By adopting the above technical solution, the utility model has the following beneficial effects:

[0016] (1) The oil storage and lubrication transmission assembly of the utility model forms a transmission structure through an eccentric shaft, a rotating body and a shift fork. The eccentric shaft drives the rotating body to rotate eccentrically, thereby driving one end of the shift fork to swing left and right around the other end, realizing the conversion from rotational motion to oscillating motion. An oil storage seat is provided which is directly fixed on the bearing seat to store oil. A strip groove is provided at the front end of the oil storage seat for the shift fork to be inserted into the oil storage seat and provides sufficient space for the shift fork to swing left and right. The overall structure is simple and easy to install. The entire oil storage seat cover is provided outside the rotating body, completely surrounding the rotating body. When the rotating body rotates, the lubricating oil accumulated below is re-attached to the rotating body to realize oil supply. At the same time, a small amount of lubricating oil will be carried up by the rotational motion and can still fall into the oil storage seat. Compared with the existing structure, the lubricating oil is completely stored in the oil storage seat, and the oil storage and oil supply effects are better. In addition, the structure is simple, the assembly is convenient, and the manufacturing cost is low.

[0017] (2) The oil storage lubrication transmission assembly of the utility model realizes the fixed connection between the oil storage seat and the bearing seat by screws, and the connection is firm and easy to disassemble and assemble.

[0018] (3) The oil storage and lubrication transmission assembly of the utility model cleverly borrows part of the structure of the bearing seat and forms an oil storage tank together with the oil storage seat, thereby reducing the axial size of the overall structure. Not only is the transmission more stable, but the structure is also more compact, which is more conducive to the miniaturization of tools.

[0019] (4) The utility model electric tool adopts a brand-new structure of oil storage lubrication transmission component, which makes the overall structure more compact and has a longer service life.

[0020] (5) The utility model electric tool is provided with an independent wrench, which is convenient for handheld operation.

[0021] (6) The electric tool of the utility model provides an arc-shaped notch and an arc-shaped groove in the oil storage tank and the second shell in sequence, thereby forming more hand-holding avoidance space under the wrench without increasing the longitudinal dimension of the overall structure, ensuring a compact size while providing the operator with a better sense of use.

[0022] (7) The utility model dissipates heat from the drive motor by setting the fan blades to rotate synchronously with the motor shaft, and discharges the heat from the heat dissipation groove, thereby better protecting the drive motor, preventing the drive motor from overheating during operation, and extending its service life.

[0023] (8) The utility model provides a balancing block to ensure dynamic balance during high-speed eccentric rotation, thereby improving safety in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to make the content of the utility model easier to understand, the utility model is further described in detail below based on specific embodiments and in conjunction with the accompanying drawings, wherein:

[0025] Figure 1 This is a schematic diagram of the structure of the electric tool of the utility model;

[0026] Figure 2 This is a schematic diagram of the internal structure of the electric tool of the utility model;

[0027] Figure 3 This is a three-dimensional diagram of the oil storage seat of the utility model;

[0028] Figure 4 It is the rear view of the oil storage seat of the utility model.

[0029] The reference numerals in the accompanying drawings are:

[0030] First shell 1, heat dissipation slot 1-1, second shell 2, arc-shaped slot 2-1, active unit 3, driven unit 4, bearing seat 5, bearing 6, eccentric shaft 7, rotating body 8, shift fork 9, oil reservoir 10, strip slot 10-1, arc-shaped slot 10-2, arc-shaped notch 10-3, balancing block 12, fan blade 13, wrench 14. DETAILED DESCRIPTION

[0031] In order to better understand the above technical solution, the above technical solution will be described in detail below with reference to the accompanying drawings and specific implementation methods.

[0032] (Example 1)

[0033] like Figures 1 to 4 The oscillating handheld power tool shown includes an oil storage lubrication transmission assembly and a first shell 1 and a second shell 2 fixedly connected. An active unit 3 is provided in the first shell 1, and a driven unit 4 perpendicular to the active unit 3 is provided in the second shell 2, wherein the active unit 3 is connected to the driven unit 4 through the oil storage lubrication transmission assembly and is suitable for driving the driven unit to perform oscillating motion.

[0034] Specifically, the oil storage lubrication transmission assembly includes a bearing seat 5, a bearing 6, an eccentric shaft 7, a rotating body 8, a shift fork 9, and an oil storage seat 10. The bearing seat 5 is fixedly mounted at the front end of the first housing 1, and the eccentric shaft 7 is rotatably mounted within the bearing seat 5 via the bearing 6. The active unit 3 is a motor fixedly mounted within the first housing 1, with the motor shaft of the motor fixedly connected to the rear end of the eccentric shaft 7. The rotating body 8 is sleeved on the eccentric shaft 7, thereby achieving eccentric rotation under the drive of the motor. The oil storage seat 10 is covered and arranged outside the rotating body 8. The front end surface is provided with multiple screw holes, and the screw holes are provided with screws that are tightened on the front end surface of the bearing seat 5 to achieve coaxial fixed installation on the bearing seat 5. The structure is simple and easy to disassemble and assemble. The front end of the oil reservoir 10 is provided with a strip groove 10-1. The front end of the shift fork 9 is fixedly connected to the driven unit 4. The rear end gap passes through the strip groove 10-1 and is symmetrically provided with two free ends. The two free ends are arranged in conjunction with the rotating body, so that the rotating body 8 is limited between the two free ends. The eccentric movement of the rotating body 8 drives the rear end of the shift fork 9 to swing left and right, thereby realizing the oscillating movement of the driven unit 4. In order to ensure that the swing of the shift fork 9 is not disturbed, the length of the strip groove 10-1 is greater than the swing stroke of the shift fork 9. Since the entire oil reservoir 10 is covered outside the rotating body 8 and completely surrounds the rotating body 8, as the rotating body 8 rotates, the lubricating oil accumulated below will re-attach to the rotating body to achieve oil supply. At the same time, a small amount of lubricating oil will be carried up by the rotational movement and can still fall into the oil reservoir 10, which has a better oil storage effect.

[0035] To achieve miniaturization, the strip groove 10-1 of this embodiment axially extends through the oil reservoir 10. The rear end of the oil reservoir 10 is provided with arcuate grooves 10-2 symmetrically located on either side of the strip groove 10-1 in the width direction. The front end of the inner ring of the bearing seat 5 is provided with an annular protrusion 6-1, and the inner diameter of the annular protrusion 6-1 is smaller than that of the arcuate groove 10-2, thereby forming an oil reservoir together with the arcuate groove 10-2. By cleverly utilizing part of the structure of the bearing seat 5 to form the oil reservoir together with the oil reservoir 10, the axial dimension of the overall structure is reduced, which not only makes the transmission more stable, but also makes the structure more compact, which is more conducive to the development of tool miniaturization.

[0036] A balancing block 12 is sleeved on the eccentric shaft 7, located between the bearing 6 and the rotating body 8, to ensure dynamic balance during high-speed eccentric rotation and improve safety in use. A fan blade 13 is coaxially fixedly mounted on the motor shaft between the motor and the eccentric shaft 7. The first housing 1 is provided with a heat dissipation groove 1-1 arranged along the outer circumference of the fan blade 13. The fan blade rotates synchronously with the motor shaft, thereby dissipating heat from the drive motor and discharging it through the heat dissipation groove, thereby better protecting the drive motor, preventing it from overheating during operation, and extending its service life.

[0037] A wrench 14 is fixedly mounted on the outer circumference of the second housing 2, away from the output end of the driven unit 4, for convenient handheld operation. A downwardly recessed arcuate groove 2-1 is defined in the second housing 2 below the wrench 14. The oil reservoir 10 is provided with an arcuate notch 10-3 corresponding to the arcuate groove 2-1. This creates more hand-held clearance beneath the wrench without increasing the overall longitudinal dimensions of the structure, ensuring a compact design while providing a more user-friendly experience.

[0038] The oil storage and lubrication transmission assembly of this embodiment forms a transmission structure through the eccentric shaft 7, the rotating body 8 and the shift fork 9, and the eccentric shaft 7 drives the rotating body 8 to rotate eccentrically, thereby driving one end of the shift fork 9 to swing left and right around the other end, realizing the conversion from rotational motion to oscillation motion. An oil storage seat 10 directly fixed on the bearing seat 5 is provided to store oil. A strip groove 10-1 is provided at the front end of the oil storage seat 10 for the shift fork 9 to be inserted into the oil storage seat 10 and providing enough space for the shift fork to swing left and right. The overall structure is simple and easy to install; the entire oil storage seat 10 is covered outside the rotating body 8, completely surrounding the rotating body 8. When the rotating body 8 rotates, the lubricating oil accumulated below is re-attached to the rotating body to realize oil supply. At the same time, a small amount of lubricating oil will be brought up by the rotation motion and can still fall into the oil storage seat; compared with the existing structure, the lubricating oil is completely stored in the oil storage seat, the oil storage and oil supply effects are better, and the structure is simple, the assembly is convenient, and the manufacturing cost is low.

[0039] The specific embodiments described above further illustrate the purpose, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An oil storage lubrication transmission assembly, characterized in that: It includes a bearing seat, a bearing arranged in the bearing seat, and an eccentric shaft rotatably installed in the bearing seat through the bearing, a rotating body is sleeved on the eccentric shaft, a shift fork is provided at the front end of the rotating body, two free ends are symmetrically provided at one end of the shift fork, the rotating body is cooperated and arranged between the two free ends, and an external cover is provided with an oil storage seat coaxially fixed on the bearing seat, a strip groove with a length greater than the swing stroke of the shift fork is opened at the front end of the oil storage seat, and the gap at the other end of the shift fork passes through the strip groove and extends to the outside of the oil storage seat.

2. The oil storage lubrication transmission assembly according to claim 1, characterized in that: The front end surface of the oil storage seat is provided with a plurality of screw holes, and screws which are tightened on the bearing seat are provided in the screw holes.

3. The oil storage lubrication transmission assembly according to claim 1, characterized in that: The strip groove passes through the oil storage seat axially, and the rear end of the oil storage seat is provided with arc grooves symmetrically located on both sides of the width direction of the strip groove. The front end of the inner ring of the bearing seat is provided with an annular convex portion, and the inner diameter of the annular convex portion is smaller than the inner diameter of the arc groove, thereby forming an oil storage groove with the arc groove.

4. An oscillating handheld power tool, characterized in that: It comprises the oil storage lubrication transmission assembly as described in any one of claims 1 to 3 and a first shell and a second shell fixedly connected, wherein an active unit is provided in the first shell, and a driven unit perpendicular to the active unit is provided in the second shell, and the active unit is connected to the driven unit through the oil storage lubrication transmission assembly and is suitable for driving the driven unit to perform oscillating motion.

5. The oscillating handheld power tool according to claim 4, characterized in that: A wrench is fixedly provided on a side of the outer circumferential surface of the second housing away from the output end of the driven unit.

6. The oscillating handheld power tool according to claim 4, characterized in that: The second housing is provided with a downwardly recessed arc groove below the wrench, and the oil storage seat is provided with an arc notch corresponding to the arc groove.

7. The oscillating handheld power tool according to claim 4, characterized in that: The active unit is a fixed motor, the motor shaft of the motor is fixedly connected to the eccentric shaft, a fan blade is coaxially fixedly installed on the motor shaft between the motor and the eccentric shaft, and the first shell is provided with a heat dissipation groove arranged along the outer peripheral surface of the fan blade.

8. The oscillating handheld power tool according to claim 4, characterized in that: The eccentric shaft is sleeved with a balancing block located between the bearing and the rotating body.

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