Multi-stage gearbox mechanical speed regulation structure

Abstract

The utility model discloses a multi-stage gearbox mechanical speed regulation structure which comprises a gearbox shell, a first thousand-time frame, a second thousand-time frame and a speed regulation toggle button. A first track groove and a second track groove are formed in the speed regulation toggle button; two ends of the first thousand-autumn frame are connected with a second movable gear ring, and a convex tracing part of the second movable gear ring is arranged in the first track groove; the two ends of the second thousand-autumn frame are connected with the first movable gear ring, and the protruding tracking part is arranged in the second track groove. By adjusting the speed adjusting toggle button, the protruding tracking part moves in the track groove, so that the positions of the two ends of the lifting frame are adjusted, and the first movable gear ring and the second movable gear ring are driven to move in the gear box. According to the structure, the problems that the transmission efficiency is reduced and the torque and the rotating speed are not accurate due to large-area high-speed friction between an existing embedded type lifting frame and a movable gear ring are solved, and the speed regulation precision and the transmission performance are improved.

Description

Technical Field

[0001] This utility model relates to a speed control structure for power tools, and more particularly to a multi-stage gearbox mechanical speed control structure. Background Technology

[0002] Electric drills work by transmitting power from the power output unit to the tool unit via a transmission component. Current electric drills only provide a single speed transmission and lack multi-stage speed adjustment mechanisms, thus failing to provide multiple levels of constant-speed rotation.

[0003] Existing multi-stage adjustable gearboxes achieve multi-stage speed regulation between the power unit and the tool unit by rotating a speed regulating ring within the gearbox to adjust the positions of the first and second moving gear rings. This solves the problem that existing electric drills cannot perform multi-stage speed regulation. However, this device uses an embedded swing arm to adjust the positions of the first and second moving gear rings within the gearbox, resulting in large-area, high-speed friction between the swing arm and the first and second moving gear rings. This reduces transmission efficiency and leads to inaccurate torque and speed readings. Utility Model Content

[0004] This utility model discloses a multi-stage gearbox mechanical speed regulation structure. The gearbox housing is provided with a first swing arm and a second swing arm. The speed regulation knob is provided with a first track groove and a second track groove. The first swing arm is connected to the first moving gear ring at both ends. The protruding tracking part of the first swing arm is located in the first track groove. The second swing arm is connected to the first moving gear ring at both ends. The protruding tracking part of the second swing arm is located in the second track groove. Adjusting the position of the speed regulation knob causes the protruding tracking part to change its position in the track groove, thereby adjusting the position of the first and second swing arms to drive the first and second moving gear rings in the gearbox.

[0005] This invention solves the problem that existing embedded swing frames suffer from large-area high-speed friction with the first and second moving gear rings, which reduces transmission efficiency and leads to inaccurate torque and speed. This is achieved by adjusting the position of the speed control knob to change the position of the protruding tracking part within the track groove, thereby adjusting the positions of the two ends of the swing frame and driving the first and second moving gear rings within the gearbox.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A multi-stage gearbox mechanical speed regulation structure includes: a gearbox housing, a first swing arm, a second swing arm, and a speed regulation knob. The gearbox housing is provided with the first swing arm and the second swing arm. The speed regulation knob has a first track groove and a second track groove. The first and last ends of the first swing arm are connected to a second moving gear ring. The protruding tracking part of the first swing arm is disposed in the first track groove. The first and last ends of the second swing arm are connected to the first moving gear ring. The protruding tracking part of the second swing arm is disposed in the second track groove. Adjusting the position of the speed regulation knob causes the protruding tracking part to change its position in the track groove, thereby adjusting the position of the first and last ends of the swing arm to drive the first and second moving gear rings in the gearbox.

[0008] Further configuration includes a swing frame rotation fulcrum groove, an insertion connecting elongated hole, and positioning balls. The first swing frame is secured in the first swing frame rotation fulcrum groove, allowing it to rotate slightly around the first swing frame rotation fulcrum groove as its rotation axis. The second swing frame is secured in the second swing frame rotation fulcrum groove, allowing it to rotate slightly around the second swing frame rotation fulcrum groove as its rotation axis.

[0009] Further configuration includes a first positioning notch, a second positioning notch, and a third positioning notch, with the positioning ball engaged with each of the three notches respectively.

[0010] Further configuration: when the first positioning notch is engaged with the positioning ball, the protruding tracking parts of the first and second swing frames are in the first gear zone of the speed control knob, which is state one.

[0011] When the second positioning notch is stuck with the positioning ball, the protruding tracking parts of the first and second swing frames are in the second gear area of ​​the speed adjustment knob, which is state two.

[0012] When the third positioning notch is stuck with the positioning ball, the protruding tracking parts of the first and second swing frames are in the third gear zone of the speed adjustment knob, which is state three.

[0013] This invention solves the problem that existing embedded swing frames suffer from large-area high-speed friction with the first and second moving gear rings, which reduces transmission efficiency and leads to inaccurate torque and speed. This is achieved by adjusting the position of the speed control knob to change the position of the protruding tracking part within the track groove, thereby adjusting the positions of the two ends of the swing frame and driving the first and second moving gear rings within the gearbox. Attached Figure Description

[0014] Figure 1 This is a perspective view of some components of the present invention;

[0015] Figure 2 This is a bottom view of the speed control knob of this utility model;

[0016] Figure 3 A perspective view of the speed control knob of this utility model;

[0017] Figure 4 A perspective view of some components of the electric drill equipped with this utility model in a temporary state;

[0018] Figure 5 A left view of some components when the present invention is in a state of service;

[0019] Figure 6 A top view of some components of this utility model in a state of readiness;

[0020] Figure 7 A perspective view of some components of the electric drill in state two equipped with this utility model;

[0021] Figure 8 A left view of some components when the present invention is equipped in its second state;

[0022] Figure 9 A top view of some components when the present invention is equipped in its second state;

[0023] Figure 10 A perspective view of some components of the electric drill in state three equipped with this utility model;

[0024] Figure 11 A left view of some components when the present invention is equipped in state three;

[0025] Figure 12 A top view of some components when the present invention is equipped in state three;

[0026] Figure 13 A perspective view of some components of the gearbox;

[0027] Figure 14 Explosion of some components of the gearbox Figure 1 ;

[0028] Figure 15 Explosion of some components of the gearbox Figure 2 ;

[0029] In the picture:

[0030] Gearbox housing 1, first swing frame rotation fulcrum groove 111, second swing frame rotation fulcrum groove 112, insertion connecting elongated hole 12, positioning ball bearing 13.

[0031] First Thousand-Step Stand 21, Second Thousand-Step Stand 22, Protruding Tracking Part 23

[0032] Speed ​​control knob 3, positioning notch 31, first positioning notch 33, second positioning notch 32, third positioning notch 32.

[0033] First track slot 41, second track slot 42, first gear area 43, second gear area 44, third gear area 45.

[0034] First reduction gear set 51, first sun gear 511, first planetary gear set 512, first planetary carrier 513, first planetary gear connecting column 514.

[0035] Second reduction gear set 52, second sun gear 521, second planetary gear set 522, second planetary carrier 523, second planetary gear connecting column 524.

[0036] Third reduction gear set 53, third sun gear 531, third planetary gear set 532, third planetary carrier 533, third planetary gear connecting column 534, drive shaft connecting position 535.

[0037] End cap 542, first fixed internal gear ring 5421, first limiting block 5421, drive shaft 544, bearing 5441

[0038] First moving gear ring 55, third limit block 551

[0039] Second moving gear ring 56, fourth limit block 561. Detailed Implementation

[0040] 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.

[0041] 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.

[0042] Secondly, this utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views showing the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this utility model. In addition, in actual manufacturing, the three-dimensional spatial dimensions of length, width, and depth should be included.

[0043] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0044] like Figures 1-15 As shown:

[0045] A multi-stage gearbox mechanical speed regulation structure includes: a gearbox housing 1, a first swing arm 21, a second swing arm 22, and a speed regulation knob 3. The gearbox housing 1 is provided with the first swing arm 21 and the second swing arm 22. The speed regulation knob 3 is provided with a first track groove 41 and a second track groove 42. The first and last ends of the first swing arm 21 are connected to a second moving gear ring 56. The protruding tracking part 23 of the first swing arm 21 is disposed in the first track groove 41. The first and last ends of the second swing arm 22 are connected to a first moving gear ring 55. The protruding tracking part 23 of the second swing arm 22 is disposed in the second track groove 42. Adjusting the position of the speed regulation knob 3 causes the protruding tracking part 23 to change its position in the track groove, thereby adjusting the position of the first and last ends of the swing arm to drive the first and second moving gear rings in the gearbox.

[0046] Further configuration includes a first swing frame rotation fulcrum groove 111, a second swing frame rotation fulcrum groove 112, an insertion connecting elongated hole 12, and positioning balls 13. The first swing frame 21 is engaged in the first swing frame rotation fulcrum groove 111, allowing it to rotate slightly around the first swing frame rotation fulcrum groove 111 as its rotation axis. The second swing frame 22 is engaged in the second swing frame rotation fulcrum groove 112, allowing it to rotate slightly around the second swing frame rotation fulcrum groove 112 as its rotation axis. The insertion connecting elongated hole 12 is used for the first swing frame 21 and the second swing frame 22 to pass through and connect with the second moving gear ring 56 and the first moving gear ring 55. The positioning balls 13 are installed inside the gearbox housing and are used to engage with multiple positioning notches on the speed control knob to achieve quick and accurate gear locking.

[0047] Further configuration includes a first positioning notch 31, a second positioning notch 32, and a third positioning notch 33, allowing the positioning ball 13 to engage with each of these notches respectively.

[0048] Further configuration: when the first positioning notch 31 is engaged with the positioning ball 13, the protruding tracking part 23 of the first swing frame 21 and the second swing frame 22 is in the first gear area 43 of the speed control knob 3, which is state one.

[0049] The status remains the same Figure 4-6 As shown (in combination) Figure 13-15 At this time, the first moving gear ring 55 meshes with the second planetary gear set 522. The transmission logic of the first reduction gear set 51 is that the first planetary gear set 512 is driven by the first sun gear 511. The first planetary gear set 512 rotates around the first planetary gear connecting column 514 as the axis and revolves around the first sun gear 511 as the center. While the first planetary gear set 512 revolves, it drives the first planet carrier 513 to rotate synchronously around the first sun gear 511 as the center. The first reduction gear set 51 plays a speed reduction role, and the transmission ratio is A.

[0050] The second sun gear 521 rotates synchronously with the first planetary carrier 513. The second planetary gear set 522 is driven by the second sun gear 521. The second planetary gear set 522 meshes synchronously with the first moving gear ring 55, which acts as a limiting element. The second planetary gear set 522 rotates on its own axis about the second planetary gear connecting column 524 and revolves around the second sun gear 521. While revolving, the second planetary gear set 522 drives the second planetary carrier 523 to rotate around the second sun gear 521. The second reduction gear set 52 acts as a reduction element, with a transmission ratio of B.

[0051] The third sun gear 531 rotates synchronously with the second planetary carrier 523. The third planetary gear set 532 is driven by the third sun gear 531. The third planetary gear set 532 meshes synchronously with the second moving gear ring 56, which acts as a limiting force. The third planetary gear set 532 rotates on its own axis about the third planetary gear connecting column 534 and revolves around the third sun gear 531. While revolving, the third planetary gear set 532 drives the third planetary carrier 533 to rotate around the third sun gear 531. The third reduction gear set 53 acts as a speed reducer with a transmission ratio of C.

[0052] Therefore, at this point, state one is a three-stage deceleration state, and the speed regulation ratio of the gearbox is A*B*C.

[0053] When the third positioning notch 33 is stuck with the positioning ball 13, the protruding tracking part 23 of the first swing frame 21 and the second swing frame 22 is in the second gear area 44 of the speed adjustment knob 3, which is state two.

[0054] State 2 as Figure 7-9 As shown (in combination) Figure 13-15 At this time, the first moving gear ring 55 meshes with the second planetary gear set 522. The transmission logic of the first reduction gear set 51 is that the first planetary gear set 512 is driven by the first sun gear 511. The first planetary gear set 512 rotates around the first planetary gear connecting column 514 as the axis and revolves around the first sun gear 511 as the center. While the first planetary gear set 512 revolves, it drives the first planet carrier 513 to rotate synchronously around the first sun gear 511 as the center. The first reduction gear set 51 plays a speed reduction role, and the transmission ratio is A.

[0055] The second sun gear 521 rotates synchronously with the first planetary carrier 513. The second planetary gear set 522 is driven by the second sun gear 521. The second planetary gear set 522 meshes synchronously with the first moving gear ring 55, which acts as a limiting element. The second planetary gear set 522 rotates on its own axis about the second planetary gear connecting column 524 and revolves around the second sun gear 521. While revolving, the second planetary gear set 522 drives the second planetary carrier 523 to rotate around the second sun gear 521. The second reduction gear set 52 acts as a reduction element, with a transmission ratio of B.

[0056] At this time, the second moving ring gear 56 meshes with the second planetary carrier 523 and the third planetary gear set 532. Therefore, the second planetary carrier 523, the third reduction gear set 53, and the second moving ring gear 56 rotate synchronously. Thus, the transmission ratio from the second planetary carrier 523 to the drive shaft connection position 535 is 1.

[0057] Therefore, at this time, state two is a two-stage deceleration state, and the speed regulation ratio of the gearbox is A*B*1.

[0058] When the second positioning notch 32 is locked with the positioning ball 13, the protruding tracking part 23 of the first swing frame 21 and the second swing frame 22 is in the third gear zone 45 of the speed adjustment knob 3, which is state three.

[0059] State Three Figure 10-12 As shown (in combination) Figure 13-15 The transmission logic of the first reduction gear set 51 is as follows: the first planetary gear set 512 is driven by the first sun gear 511 through meshing. The first planetary gear set 512 rotates on its own axis around the first planetary gear connecting column 514 and revolves around the first sun gear 511. While the first planetary gear set 512 revolves, it drives the first planet carrier 513 to rotate synchronously around the first sun gear 511. The first reduction gear set 51 plays a role in speed reduction, and the transmission ratio is A.

[0060] At this time, the first moving gear ring 55 meshes with the second planetary gear set 522 and the second planetary carrier 523. Therefore, the second sun gear 521, which is integrated with the first planetary carrier 513, drives the second planetary gear set 522 and the second planetary carrier 523 to rotate synchronously. So the transmission ratio from the first planetary carrier 513 to the third sun gear 531 is 1.

[0061] The third sun gear 531 rotates synchronously with the second planetary carrier 523. The third planetary gear set 532 is driven by the third sun gear 531. The third planetary gear set 532 meshes synchronously with the second moving gear ring 56, which acts as a limiting force. The third planetary gear set 532 rotates on its own axis about the third planetary gear connecting column 534 and revolves around the third sun gear 531. While revolving, the third planetary gear set 532 drives the third planetary carrier 533 to rotate around the third sun gear 531. The third reduction gear set 53 acts as a speed reducer with a transmission ratio of C.

[0062] Therefore, at this point, state three is a two-stage deceleration state, and the speed regulation ratio of the gearbox is A*1*C.

[0063] Preferably, the surface of the connection between the first swing frame 21 and the second swing frame 22 and the moving gear ring is coated with a low sliding resistance and high wear-resistant material coating, such as graphene or special ceramics.

[0064] This invention solves the problem that existing embedded swing frames, by adjusting the position of the speed control knob 3 to change the position of the protruding tracking part 23 within the track groove, thereby adjusting the positions of the two ends of the swing frame and driving the first moving gear ring 55 and the second moving gear ring 56 within the gearbox, suffer from large-area high-speed friction with the first and second moving gear rings, which reduces transmission efficiency and leads to inaccurate torque and speed.

[0065] The speed control knob of this invention is easy to operate by rotation. By engaging the positioning ball with the positioning notch, it achieves repeated and precise positioning of each gear position, thereby ensuring stable and reliable gear transmission.

[0066] Although this embodiment of the present invention takes three gears as an example, it can be extended to four or more gears by adjusting the length and curvature of the track groove inside the dial to adapt to more complex speed adjustment needs.

[0067] Although the present invention has been described above with reference to embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the features in the embodiments disclosed in this invention can be combined with each other in any way. The lack of an exhaustive description of these combinations in this specification is merely for the sake of brevity and resource conservation. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A multi-stage gearbox mechanical speed regulating structure, characterized in that, include: The gearbox housing (1), the first swing frame (21), the second swing frame (22), and the speed control knob (3) are provided. The gearbox housing (1) is provided with the first swing frame (21) and the second swing frame (22). The speed control knob (3) is provided with the first track groove (41) and the second track groove (42). The first swing frame (21) is connected to the second moving gear ring at both ends. The protruding tracking part (23) of the first swing frame (21) is located in the first track groove (41). The second swing frame (22) is connected to the first moving gear ring at both ends. The protruding tracking part (23) of the second swing frame (22) is located in the second track groove (42). The position of the speed control knob (3) is adjusted to change the position of the protruding tracking part (23) in the track groove, thereby adjusting the position of the first and second swing frames to drive the first and second moving gear rings in the gearbox.

2. The multi-stage gearbox mechanical speed regulating structure according to claim 1, characterized in that: The gearbox housing (1) is provided with: a first swing frame rotation fulcrum groove (111), a second swing frame rotation fulcrum groove (112), an insertion connecting strip hole (12), and a positioning ball (13). The first swing frame (21) is locked in the first swing frame rotation fulcrum groove (111), and the first swing frame (21) can rotate slightly with the first swing frame rotation fulcrum groove (111) as the rotation axis. The second swing frame (22) is locked in the second swing frame rotation fulcrum groove (112), and the second swing frame (22) can rotate slightly with the second swing frame rotation fulcrum groove (112) as the rotation axis.

3. The multi-stage gearbox mechanical speed regulating structure according to claim 2, characterized in that: The speed control knob (3) is provided with a first positioning notch (31), a second positioning notch (32), and a third positioning notch (33), and the positioning ball (13) can be locked with the first positioning notch (31), the second positioning notch (32), and the third positioning notch (33) respectively.

4. The multi-stage gearbox mechanical speed regulating structure according to claim 3, characterized in that: When the first positioning notch (31) is stuck with the positioning ball (13), the protruding tracking part (23) of the first swing frame (21) and the second swing frame (22) is in the first gear area (43) of the speed adjustment knob (3), which is state one; When the third positioning notch (33) is stuck with the positioning ball (13), the protruding tracking part (23) of the first swing frame (21) and the second swing frame (22) is in the second gear area (44) of the speed adjustment knob (3), which is state two; When the second positioning notch (32) is stuck with the positioning ball (13), the protruding tracking part (23) of the first swing frame (21) and the second swing frame (22) is in the third gear area (45) of the speed adjustment knob (3), which is state three.

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