Electric tool gearbox
By adding through holes in the middle layer of the power tool gear box and establishing airflow microcirculation channels, the oil spillover problem caused by pressure imbalance in the gear box is solved, and the working environment and use effect are improved.
Patent Information
- Application Number
- CN202421592705.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-08
- Publication Date
- 2025-05-13
- Estimated Expiration
- 2034-07-08
AI Technical Summary
There is pressure imbalance in the internal space of the gearbox of traditional power tools, which leads to oil spillover, affecting the effectiveness of use and cleanliness.
A new through hole is added to the intermediate layer of the gearbox to establish a microcirculation channel for space airflow and improve the spatial pressure balance between the gearbox, the intermediate cover and the cylinder box.
Effectively prevent oil spillage, improve working environment, and improve usage effect.
Smart Images
Figure CN222864059U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of gear boxes, in particular to a gear box for electric tools. Background Art
[0002] The gearbox is one of the main core components of the power tool, and its main function is to provide the power required for the power tool to rotate. In order to make it more convenient for workers to use, the existing power tools are multifunctional, that is, they can be used for drilling and screwing;
[0003] There is pressure imbalance in the internal space of the gearbox of traditional power tools, and grease is likely to overflow from the gearbox during use, which greatly affects the use of the gearbox and the cleanliness of the outside of the gearbox. Summary of the invention
[0004] The purpose of the utility model is to provide a power tool gear box to solve the problems raised in the above background technology.
[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an electric tool gear box, comprising a motor and a gear box, the motor and the gear box are drivingly connected, a gear one is arranged inside the gear box, and the lower side of the gear one is screwed with an intermediate cover, an eccentric shaft is passed through and fixed to the gear one, and the top of the eccentric shaft extends to the upper side of the gear box, a connecting rod is rotatably connected inside the gear box, and the connecting rod is rotatably connected to the eccentric shaft, and the gear one is driven to rotate by a gear sleeved on the outside of the output shaft at the top of the motor, thereby driving the eccentric shaft to rotate, and further driving the connecting rod to reciprocate and move laterally inside the gear box.
[0006] Preferably, a piston assembly is fixed inside the gear box near one end of the connecting rod.
[0007] Preferably, a cylinder sleeve is fixed inside the gear box, and the piston assembly is movably connected inside the cylinder sleeve.
[0008] Preferably, the motor output shaft gear is meshedly connected with gear three at a position away from gear one on the outside, and gear four is vertically meshedly connected on the outside of gear three, and gear four is annularly sleeved on the outside of the cylinder assembly.
[0009] Compared with the prior art, the beneficial effects of the utility model are:
[0010] An application invention with a circulation channel hole in an electric tool gear box, which can effectively enable conduction between the gear box and the middle cover, and between the gear box and the cylinder box in the electric tool, establish a spatial airflow microcirculation channel, improve the spatial pressure balance between the gear box, the middle cover, and the cylinder box, prevent grease from overflowing, improve the working environment, and greatly enhance the use effect.
[0011] Based on practical application, a new conducting hole is added to the middle layer of the gear box to enable conduction between the first, second and third spaces, establish a spatial airflow microcirculation channel, improve the spatial pressure balance between the gear box, the middle cover and the cylinder box, which is of great practical significance for preventing grease overflow, improving the working environment, and improving the use effect. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0013] Figure 1 This is the overall structural view of the utility model;
[0014] Figure 2 It is a partial enlarged view of the utility model.
[0015] Legend:
[0016] 1. Motor; 2. Gear box; 3. Gear 1; 4. Intermediate cover; 5. Eccentric shaft; 6. Connecting rod; 7. Piston assembly; 8. Cylinder sleeve; 9. Gear 2; 10. Gear 3; 11. Gear 4; 12. First space area; 13. Second space area; 14. Third space area; 15. Through hole; DETAILED DESCRIPTION
[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0018] See also Figure 1 , the utility model provides a technical solution:
[0019] An electric tool gear box 2 comprises a motor 1 and a gear box 2, wherein the motor 1 is transmission-connected to the gear box 2, a gear 3 is arranged inside the gear box 2, and the lower side of the gear 3 is screwed with an intermediate cover 4, an eccentric shaft 5 is fixed through the gear 3, and the top of the eccentric shaft 5 extends to the upper side of the gear box 2, a connecting rod 6 is rotationally connected inside the gear box 2, and the connecting rod 6 is rotationally connected to the eccentric shaft 5, and the gear 3 is driven to rotate by the gear sleeved on the outside of the output shaft at the top of the motor 1, thereby driving the eccentric shaft 5 to rotate, and further driving the connecting rod 6 to reciprocate and laterally displace inside the gear box 2.
[0020] The area where the lower part of the middle layer of the gear box 2 and the middle cover 4 are combined is set as a first space area 12;
[0021] Gear 1 3 is connected to the eccentric shaft 5, and the upper part of the gear box 2 is set as a second space area 13;
[0022] Gear 2 9 is connected to gear 3 10 via a connecting piece, and gear 3 10 drives gear 4 11 to work in a region which is set as a third space region 14 .
[0023] Specifically, a piston assembly 7 is fixed inside the gear box 2 at one end close to the connecting rod 6 .
[0024] Specifically, a cylinder sleeve 8 is fixed inside the gear box 2, and the piston assembly 7 is movably connected inside the cylinder sleeve 8.
[0025] Specifically, the output shaft gear of the motor 1 is meshedly connected with a gear 3 10 at a position away from the gear 1 3 , and the gear 3 10 is vertically meshedly connected with a gear 4 11 at the outside. The gear 4 11 is annularly sleeved on the outside of the cylinder assembly.
[0026] Working principle:
[0027] The motor 1 drives the gear 1 3, gear 2 9, gear 3 10, and gear 4 11 to rotate. Gear 1 3 is connected to gear 2 9, and the area where they are combined with the middle cover 4 at the lower part of the middle layer of the gear box 2 is defined as the first space area 12. Gear 1 3 is connected to the eccentric shaft 5, and the upper part of the gear box 2 is defined as the second space area 13. Gear 2 9 is connected to gear 3 10 through a connecting piece, and gear 3 10 drives gear 4 11 to work, which is defined as the third space area 14.
[0028] When the motor 1 is working, the gear 1 3 is connected with the gear 2 9, and there is continuous air pressure in the first space area 12 in the joint area between the lower part of the middle layer of the gear box 2 and the middle cover 4. When the pressure is large enough, the lubricating grease in the first space will be forced to overflow, which will not only pollute the working environment, but also affect the health of the operator and the service life of the product.
[0029] Similarly, the second and third spaces will also generate space pressure when working, and this pressure will be discharged from the second space setting area.
[0030] An application invention with a circulation channel hole in the gear box 2 of an electric tool can effectively make the conduction between the gear box 2 and the middle cover 4, and the gear box 2 and the cylinder box in the electric tool, establish a spatial airflow microcirculation channel, improve the spatial pressure balance between the gear box 2, the middle cover 4, and the cylinder box, prevent grease from overflowing, improve the working environment, and improve the use effect. Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it; although the utility model is described in detail with reference to the above embodiments, ordinary technicians in this field should understand that it is still possible to modify the technical solutions recorded in the above embodiments, or to replace some or all of the technical features therein; and these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of each embodiment of the utility model.
Claims
1. A power tool gearbox, comprising a motor (1) and a gearbox (2), characterized in that: The motor (1) is connected to the gear box (2) in a transmission manner. A gear (3) is arranged inside the gear box (2). The lower side of the gear (3) is screwed with an intermediate cover (4). An eccentric shaft (5) is fixedly passed through the gear (3). The top of the eccentric shaft (5) extends to the upper side of the gear box (2). A connecting rod (6) is rotatably connected inside the gear box (2). The connecting rod (6) is rotatably connected to the eccentric shaft (5). The gear (3) is driven to rotate by a gear sleeved on the outside of the output shaft at the top of the motor (1), thereby driving the eccentric shaft (5) to rotate, and further driving the connecting rod (6) to reciprocate and laterally move inside the gear box (2). The area where the lower part of the middle layer of the gear box (2) and the middle cover (4) are combined is set as a first space area (12); The gear 1 (3) is connected to the eccentric shaft (5), and the upper part of the gear box (2) is set as a second space area (13); Gear 2 (9) is connected to gear 3 (10) through a connecting piece, and gear 3 (10) drives gear 4 (11) to work in a region which is set as a third space region (14).
2. The electric tool gear box according to claim 1, characterized in that: A piston assembly (7) is fixed inside the gear box (2) at one end close to the connecting rod (6).
3. The electric tool gear box according to claim 2, characterized in that: A cylinder sleeve (8) is fixed inside the gear box (2), and the piston assembly (7) is movably connected inside the cylinder sleeve (8).
4. The electric tool gear box according to claim 3, characterized in that: The output shaft gear of the motor (1) is meshedly connected with a gear three (10) at a position away from the gear one (3), and the gear three (10) is vertically meshedly connected with a gear four (11) at the outside. The gear four (11) is annularly sleeved on the outside of the cylinder assembly.