Power transmission mechanism with suspended torsion spring

Abstract

The utility model provides a power transmission mechanism with a suspended torsion spring, which solves the problem that the existing starter cannot realize the linkage or separation of the external connection mechanism and the external connection power. The power transmission mechanism with a suspended torsion spring includes a shell and a main shaft rotatably arranged in the shell, one end of the main shaft is used to be connected to the external connection power, and the other end is used to be connected to the external connection mechanism. A tray is rotatably sleeved on the main shaft, and a torsion spring is arranged between the tray and the main shaft. One end of the torsion spring is fixed on the tray, and the other end is fixed on the main shaft. A one-way structure is arranged between the tray and the shell. Due to the one-way structure, the linkage or separation of the external connection mechanism and the external connection power can be realized, the structure is simple, the design is reasonable, the cost is low, the installation and disassembly process is simple, the safety is high, and it is easy to maintain.

Description

Technical Field

[0001] The utility model belongs to the technical field of machinery and relates to a power transmission mechanism with a suspended torsion spring. Background Art

[0002] Micro-tillage machines are widely used for cultivation, sowing and harvesting of rural land. The diesel engine of the micro-tillage machine must be put into operation with the help of a starter before working. For example, a diesel engine starter disclosed in a Chinese patent [authorization announcement number is CN203730194U] has a notch on the side wall of the spring cover, one end of the volute spring is fixed in the notch, and the other end of the volute spring is fixedly connected to the rotating shaft. When working, it is connected to the pre-tightening end through a crank handle, and the crank handle is turned to drive the pre-tightening shaft to rotate, the pre-tightening shaft drives the pre-tightening gear to rotate, and the pre-tightening gear drives the driven gear to rotate, thereby driving the rotating shaft to rotate, so that the volute spring stores energy, and the fork and the ratchet engage with each other under the action of the tension of the tension spring, so that the energy of the volute spring remains unreleased.

[0003] The above starter cannot realize the linkage between the pre-tightening end and the diesel engine starting disk, that is, the pre-tightening end cannot directly drive the starting disk, has a single function, and requires special tools to prevent the scroll spring from falling apart during installation or removal. There are safety hazards and it is difficult to install and maintain. Utility Model Content

[0004] The utility model aims to solve the above problems in the prior art and proposes a power transmission mechanism with a suspended torsion spring which can realize the linkage or separation of the external connection mechanism and the external connection power.

[0005] The purpose of the utility model can be achieved through the following technical solutions:

[0006] A power transmission mechanism with a suspended torsion spring comprises a shell and a main shaft rotatably arranged in the shell, one end of the main shaft is used to be connected to an external power, and the other end thereof is used to be connected to an external mechanism, a tray is rotatably sleeved on the main shaft, a torsion spring is arranged between the tray and the main shaft, one end of the torsion spring is fixed on the tray, and the other end thereof is fixed on the main shaft, and a one-way structure is arranged between the tray and the shell.

[0007] When the external connection mechanism needs to work in conjunction with the external connection power, the external connection power drives the main shaft to rotate counterclockwise, the main shaft drives the torsion spring to rotate counterclockwise, and the torsion spring drives the tray to rotate counterclockwise. At this time, the one-way structure is in a slipping state, realizing that the main shaft drives the external connection mechanism to rotate.

[0008] When the external connection mechanism needs to be separated from the external connection power, the external connection power drives the main shaft to rotate clockwise, the main shaft drives the torsion spring to rotate clockwise, and the torsion spring drives the tray to rotate clockwise. At this time, the one-way structure is in an engaged working state, preventing the tray from rotating clockwise, and the main shaft rotates clockwise to tighten the torsion spring to complete energy storage. At the same time, the one-way device between the external connection mechanism and the main shaft is in a slipping state and will not drive the external connection mechanism to work. After releasing the torsion spring, the torsion spring drives the main shaft to rotate counterclockwise, and the main shaft drives the external connection mechanism to work. At the same time, the external connection mechanism disconnects the main shaft through the clutch, realizing the separation of the external connection power and the external connection mechanism.

[0009] In the above-mentioned power transmission mechanism with suspended torsion spring, the one-way structure includes at least two control claws distributed in a circular array along the main axis and arranged on the shell, and a plurality of recessed holes distributed in a circular array along the main axis and arranged on the tray. A groove is provided in the shell, and the control claw is arranged in the groove by rotating through a rotating shaft. A blocking surface is provided in the groove. A reset spring for making the control claw abut against the blocking surface is provided between the control claw and the shell. When the tray rotates counterclockwise, the recessed hole pushes the control claw to make the control claw disengage from the blocking surface. When the tray rotates clockwise, the control claw extends into the recessed hole and abuts against the blocking surface.

[0010] When the tray rotates counterclockwise, the concave hole pushes the control claw to make the control claw separate from the blocking surface. At this time, the control claw and the concave hole are in a slipping state, so that the main shaft drives the external connection mechanism to rotate.

[0011] When the tray rotates clockwise, the control claw extends into the concave hole and abuts against the blocking surface, thereby preventing the tray from rotating clockwise. The main shaft rotates clockwise to tighten the torsion spring to complete energy storage. After releasing the torsion spring, the torsion spring drives the main shaft to rotate counterclockwise, and the main shaft drives the external connection mechanism to work, realizing the separation of the external connection power and the external connection mechanism.

[0012] In the above-mentioned power transmission mechanism with suspended torsion spring, a plurality of the recessed holes are arranged at the bottom of the tray, and the recessed groove is arranged at the inner end surface of the shell.

[0013] In the above-mentioned power transmission mechanism with suspended torsion spring, a groove is provided on the main shaft, and the other end of the torsion spring extends into and is fastened in the groove.

[0014] In the above-mentioned power transmission mechanism with suspended torsion spring, an annular step is provided on the main shaft, and the bottom of the tray is against the annular step.

[0015] In the above-mentioned power transmission mechanism with suspended torsion spring, a bearing is provided between the housing and the main shaft.

[0016] Compared with the prior art, the power transmission mechanism with a suspended torsion spring has the following advantages: due to the one-way structure, the external linkage mechanism and the external linkage force can be linked or separated, the structure is simple, the design is reasonable, the cost is low, the installation and disassembly process is simple, the safety is high, and the maintenance is easy. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a cross-sectional view of the power transmission mechanism with a suspended torsion spring provided in the first embodiment.

[0018] In the figure, 1. housing; 2. main shaft; 3. external power; 4. external mechanism; 5. tray; 6. torsion spring; 7. control claw; 8. groove; 9. annular step; 10. bearing; 11. bolt. DETAILED DESCRIPTION

[0019] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0020] Embodiment 1

[0021] like Figure 1 The power transmission mechanism with suspended torsion spring shown in the figure comprises a housing 1 and a main shaft 2 rotatably arranged in the housing 1. A concave hole is provided in the middle of the housing 1, and a bearing 10 is installed in the concave hole. The short shaft at the lower end of the main shaft 2 cooperates with the bearing 10. The lower end of the main shaft 2 extends out of the housing 1 and is connected to the external power 3. In this embodiment, the external power 3 comprises a driving gear and a driven gear meshing with the driving gear. The driven gear is coaxially fixed to the main shaft 2. When the driving gear is driven to rotate, the driven gear is driven to rotate, thereby driving the main shaft 2 to rotate.

[0022] An external connection mechanism 4 is installed on the upper part of the shell 1 by means of bolts 11. In this embodiment, the external connection mechanism 4 is the engine of the micro-tiller. The upper end of the main shaft 2 is transmission-connected to the engine. A one-way device and a clutch are arranged between the main shaft 2 and the engine. When the main shaft 2 rotates counterclockwise, the one-way device is in a working (engaged) state, driving the external connection mechanism 4 to rotate; when the main shaft 2 rotates clockwise, the belt is in a slipping state and will not drive the engine to work.

[0023] like Figure 1 As shown, an annular step 9 is provided on the main shaft 2, and a tray 5 rotatably mounted on the main shaft 2 is provided above the annular step 9. The bottom of the tray 5 is abutted against the annular step 9. A torsion spring 6 is provided between the tray 5 and the main shaft 2. The torsion spring 6 is a scroll spring. The outer end of the torsion spring 6 is fixed on the tray 5. An axially extending groove 8 is provided on the main shaft 2. The inner end of the torsion spring 6 extends into and is fastened in the groove 8. A one-way structure is provided between the tray 5 and the housing 1.

[0024] In this embodiment, the one-way structure includes two control claws 7 distributed in a circular array along the main axis 2 and arranged on the shell 1, and a plurality of recessed holes distributed in a circular array along the main axis 2 and arranged at the bottom of the tray 5. A groove is provided on the inner end surface of the shell 1. The control claw 7 is arranged in the groove by rotating through a rotating shaft. A blocking surface is provided in the groove. A return spring for making the control claw 7 abut against the blocking surface is provided between the control claw 7 and the shell 1. When the tray 5 rotates counterclockwise, the recessed hole pushes the control claw 7 to make the control claw 7 disengage from the blocking surface. When the tray 5 rotates clockwise, the control claw 7 extends into the recessed hole and abuts against the blocking surface.

[0025] When the external connection mechanism 4 needs to work in conjunction with the external connection power 3, the external connection power 3 drives the main shaft 2 to rotate counterclockwise, the main shaft 2 drives the torsion spring 6 to rotate counterclockwise, and the torsion spring 6 drives the tray 5 to rotate counterclockwise. At this time, the control claw 7 and the concave hole are in a slipping state, and the one-way device is in a working state, so that the main shaft 2 drives the external connection mechanism 4 to rotate.

[0026] When the external connection mechanism 4 needs to work separately from the external connection power 3, the external connection power 3 drives the main shaft 2 to rotate clockwise, the main shaft 2 drives the torsion spring 6 to rotate clockwise, and the torsion spring 6 drives the tray 5 to rotate clockwise. At this time, the one-way structure is in an engaged working state, preventing the tray 5 from rotating clockwise, and the main shaft 2 rotates clockwise to tighten the torsion spring 6 to complete energy storage. At this time, the one-way device is in a slipping state and will not drive the external connection mechanism 4 to work. After releasing the torsion spring 6, the torsion spring 6 drives the main shaft 2 to rotate counterclockwise, and the main shaft 2 drives the external connection mechanism 4 to work. At the same time, the external connection mechanism 4 disconnects the main shaft 2 through the clutch, realizing the separation of the external connection power 3 and the external connection mechanism 4.

[0027] Embodiment 2

[0028] The structural principle of this embodiment is basically the same as that of the first embodiment, except that the one-way structure includes two control claws 7 distributed in a circular array along the main axis 2 and arranged on the tray 5, and a plurality of recessed holes distributed in a circular array along the main axis 2 and arranged on the shell 1. A recessed hole is provided on the tray 5, and the control claw 7 is arranged in the recessed hole by rotating through a rotating shaft. A blocking surface is provided in the recessed hole, and a return spring for making the control claw 7 abut against the blocking surface is provided between the control claw 7 and the tray 5. When the tray 5 rotates counterclockwise, the recessed hole pushes the control claw 7 to separate from the blocking surface. When the tray 5 rotates clockwise, the control claw 7 extends into the recessed hole and abuts against the blocking surface.

[0029] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A power transmission mechanism with a suspended torsion spring, characterized in that: The invention comprises a shell (1) and a main shaft (2) rotatably arranged in the shell (1); one end of the main shaft (2) is used to be connected to an external connection power (3), and the other end thereof is used to be connected to an external connection mechanism (4); a tray (5) is rotatably sleeved on the main shaft (2); a torsion spring (6) is provided between the tray (5) and the main shaft (2); one end of the torsion spring (6) is fixed to the tray (5), and the other end thereof is fixed to the main shaft (2); and a one-way structure is provided between the tray (5) and the shell (1).

2. The power transmission mechanism with suspended torsion spring according to claim 1, characterized in that: The one-way structure comprises at least two control claws (7) distributed in an annular array along the main axis (2) and arranged on the shell (1) and a plurality of concave holes distributed in an annular array along the main axis (2) and arranged on the tray (5). A concave hole is provided in the shell (1), and the control claw (7) is arranged in the concave hole by rotating through a rotating shaft. A blocking surface is provided in the concave hole. A return spring for making the control claw (7) abut against the blocking surface is provided between the control claw (7) and the shell (1). When the tray (5) rotates counterclockwise, the concave hole moves the control claw (7) so that the control claw (7) is separated from the blocking surface. When the tray (5) rotates clockwise, the control claw (7) extends into the concave hole and abuts against the blocking surface.

3. The power transmission mechanism with suspended torsion spring according to claim 1, characterized in that: The one-way structure comprises at least two control claws (7) distributed in an annular array along the main axis (2) and arranged on the tray (5) and a plurality of concave holes distributed in an annular array along the main axis (2) and arranged on the shell (1); the tray (5) is provided with a concave hole, the control claw (7) is arranged in the concave hole by rotating through a rotating shaft, a blocking surface is provided in the concave hole, and a return spring for making the control claw (7) abut against the blocking surface is provided between the control claw (7) and the tray (5); when the tray (5) rotates counterclockwise, the concave hole moves the control claw (7) so that the control claw (7) is separated from the blocking surface; when the tray (5) rotates clockwise, the control claw (7) extends into the concave hole and abuts against the blocking surface.

4. The power transmission mechanism with suspended torsion spring according to claim 2, characterized in that: A plurality of the recessed holes are arranged at the bottom of the tray (5), and the recessed groove is arranged at the inner end surface of the shell (1).

5. The power transmission mechanism with suspended torsion spring according to claim 1, characterized in that: The main shaft (2) is provided with a groove (8), and the other end of the torsion spring (6) extends into and is fastened in the groove (8).

6. The power transmission mechanism with suspended torsion spring according to claim 1, characterized in that: The main shaft (2) is provided with an annular step (9), and the bottom of the tray (5) is in contact with the annular step (9).

7. The power transmission mechanism with suspended torsion spring according to claim 1, characterized in that: A bearing (10) is provided between the housing (1) and the main shaft (2).

Images