CN217355293U

CN217355293U - External push trigger type spring clutch

Info

Publication number: CN217355293U
Application number: CN202221030742.5U
Authority: CN
Inventors: 范可牛
Original assignee: Chongqing Patelong Zhitong Electronic Technology Co ltd
Current assignee: Chongqing Patlong Zhitong Electronic Technology Co ltd
Priority date: 2022-04-29
Filing date: 2022-04-29
Publication date: 2022-09-02
Anticipated expiration: 2032-04-29

Abstract

In order to solve the problems that the friction clutch in the prior art has a complex structure and high manufacturing cost, and the process of connecting or disconnecting power is not easy to control, the utility model provides an extrapolation trigger type spring clutch, which comprises an inner shaft, an outer shaft, an inner bearing, an outer bearing, a trigger mechanism and a resistance spring; the inner shaft is a cylinder; the outer shaft is a hollow shaft and is sleeved on the outer circle of the inner shaft, one end of the outer shaft is fixed on the inner shaft through an inner bearing, and the other end of the outer shaft is sleeved with an outer bearing; the trigger mechanism is arranged on one side of an outer shaft sleeve which is provided with an outer bearing; the electric screw rod is sleeved at the tail end of the outer side of the push rod, and the push rod and the electric screw rod do not rotate along with the inner shaft; the resistance spring is a close-packed spring wound anticlockwise and is sleeved between the inner bearing on the inner shaft and the trigger ring. The utility model discloses the useful technological effect of extrapolation trigger formula spring clutch is simple structure, and manufacturing cost is lower to, the process of joint or break off power is all comparatively steady and controllable.

Description

External push trigger type spring clutch

Technical Field

The utility model relates to a mechanical transmission clutch technique, in particular to extrapolation trigger formula spring clutch.

Background

The clutch is an important part indispensable in mechanical transmission, and the main functions of the clutch are power transmission and power cut-off. The clutch is similar to a switch, and the power transmission action is engaged or disengaged, the driving part and the driven part of the clutch mechanism can be temporarily separated and can be gradually engaged, and relative rotation is possible in the transmission process. The driving part and the driven part of the clutch can not adopt rigid connection. Among the various clutches, the friction clutch should be the most widely used and the most long-standing type. The most basic components of such clutches are friction plates and friction plates (also referred to as pressure plates), with the disengagement and engagement of the friction plates and friction plates effecting the disconnection and transmission of power. The friction clutch mainly comprises a driving part, a driven part, a pressing mechanism and an operating mechanism. The driving part, the driven part and the pressing mechanism are basic structures for ensuring that the clutch is in an engaged state and can transmit power, and the operating mechanism of the clutch is mainly a device for separating the clutch. During the disengaging process, the clutch pedal is stepped on, the free clearance of the clutch is firstly eliminated in the free stroke, then the disengaging clearance is generated in the working stroke, and the clutch is disengaged. During engagement, the clutch pedal is gradually released, the pressure plate moves forward under the action of the compression spring, the separation gap is firstly eliminated, and sufficient compression force acts on the pressure plate, the driven plate and the flywheel working surface; the release bearing then moves backwards under the action of the return spring, creating a free gap and the clutch engages. In order to ensure that sufficient pressing force acts on the working surfaces of the pressure plate, the driven plate and the flywheel, a preset pressure mode and the like are generally adopted, so that when the pressure plate, the driven plate and the flywheel are combined, the preset pressure acts on the working surfaces of the pressure plate, the driven plate and the flywheel. Therefore, the structure of the prior art friction clutch is complex, the manufacturing cost is high, and the process of connecting or disconnecting power is not easy to control.

Obviously, the friction clutch in the prior art has the problems of complex structure, high manufacturing cost, difficulty in controlling the process of engaging or disengaging power and the like.

Disclosure of Invention

The structure that exists for solving prior art friction clutch is comparatively complicated, and manufacturing cost is higher to, the difficult control scheduling problem still of process of joint or break-off power, the utility model provides an extrapolation trigger formula spring clutch.

The utility model discloses an extrapolation trigger type spring clutch, which comprises an inner shaft, an outer shaft, an inner bearing, an outer bearing, a trigger mechanism and a resistance spring; the inner shaft is a cylinder; the outer shaft is a hollow shaft and is sleeved on the outer circle of the inner shaft, one end of the outer shaft is fixed on the inner shaft through an inner bearing, and the other end of the outer shaft is sleeved with an outer bearing; the trigger mechanism is arranged on one side of an outer shaft sleeve which is provided with an outer bearing and comprises a trigger ring, a return spring, a flat plate bearing, a push rod and an electric screw rod; the trigger ring, the flat bearing and the push rod are sequentially arranged on the inner shaft from left to right, and respective inner circles are in sliding fit with the outer circle of the inner shaft; the trigger ring is of a flange structure, the outer circle of a pipe part of the trigger ring is matched with the inner circle of the outer shaft, part of the trigger ring is inserted between the inner circle of the outer shaft and the outer circle of the inner shaft, and the front end of the pipe part is provided with an inclined cylindrical surface which inclines upwards and rightwards by 45 degrees; the reset spring is installed between the right side of the outer shaft and the positive side of the triggering annular disc part; the electric screw rod is sleeved at the tail end of the outer side of the push rod, and the push rod and the electric screw rod do not rotate along with the inner shaft; the electric screw rod pushes the push rod to move leftwards and pushes the trigger ring to move leftwards through the flat bearing; the resistance spring is a close-packed spring wound anticlockwise, is sleeved between an inner bearing on the inner shaft and the trigger ring, and has the inner diameter and the outer diameter respectively matched with the outer circle of the inner shaft and the inner circle of the outer shaft in a sliding manner; bearing rings are respectively welded at two ends of the resistance spring, the bearing rings are circular rings with rectangular cross sections, and the inner diameters and the outer diameters of the bearing rings are respectively matched with the inner diameters and the outer diameters of the resistance spring; the left end of the resistance spring is fixed on the inner side of the inner bearing, and the right end is provided with an inclined cylindrical surface which inclines 45 degrees towards the left lower side.

Furthermore, the outer shaft is of a two-section structure, the two sections of outer shafts are sleeved on the outer circle of the inner shaft, the outer ends of the two sections of outer shafts are fixed on the inner shaft through inner bearings respectively, and the inner end is sleeved with an outer bearing; in addition, the left end of the resistance spring is fixed on the inner side of the inner bearing or the left end of the inner wall of the left-section outer shaft.

Further, the trigger mechanism is arranged in the axial middle of the inner shaft; the push rod is sleeved in the middle of the inner shaft; the electric screw rod is sleeved outside the push rod, and the push rod and the electric screw rod do not rotate along with the inner shaft; the two flat plate bearings are respectively arranged on two sides of the push rod; the two trigger rings are respectively arranged at the two ends of the push rod; the two reset springs are respectively sleeved between the end face of the inner side of the outer shaft and the positive side of the triggering ring disk part; the two resistance springs are respectively sleeved between the left outer shaft and the inner shaft and the outer ends of the two resistance springs are respectively fixed on the inner sides of the inner bearings of the left outer shaft and the right outer shaft; the electric screw rod can keep the middle part of the push rod in the middle part of the electric screw rod, push the push rod to move towards the left resistance spring and push the push rod to move towards the right resistance spring.

Furthermore, the number of the resistance springs is two, the thread pitch of the resistance springs is larger than the diameter of the steel wire for winding the resistance springs, and the resistance springs are arranged on the circumference in an angle of 180 degrees.

Furthermore, the number of the resistance springs is three, the thread pitch of the resistance springs is larger than the diameter of two times of the steel wire for winding the resistance springs, and the resistance springs are arranged at 120 degrees on the circumference.

Furthermore, the cross section of the wound steel wire of the resistance spring is rectangular.

Furthermore, the total fit clearance between the inner circle of the resistance spring and the outer circle of the inner shaft is less than 0.10mm, and the total fit clearance between the outer circle of the resistance spring and the inner circle of the outer shaft is 0.20 mm-0.50 mm.

Furthermore, the resistance spring is a high-size-progress and high-surface-finish structure with the inner circle and the outer circle both ground and processed.

The utility model discloses the useful technological effect of extrapolation trigger formula spring clutch is simple structure, and manufacturing cost is lower to, the process of joint or break off power is all comparatively steady and controllable.

Drawings

FIG. 1 is a three-dimensional external view of an embodiment 1 of an extrapolation trigger type spring clutch according to the present invention;

fig. 2 is a schematic sectional view of embodiment 1 of the present invention;

fig. 3 is an exploded three-dimensional schematic view of the triggering mechanism of embodiment 1 of the present invention;

fig. 4 is a schematic cross-sectional view of embodiment 2 of the push-out trigger spring clutch of the present invention;

fig. 5 is a schematic cross-sectional view of embodiment 3 of the push-out trigger spring clutch of the present invention;

FIG. 6 is a three-dimensional schematic diagram of two resistance springs according to the present invention;

fig. 7 is a three-dimensional schematic view of the resistance springs of the present invention;

FIG. 8 is a schematic cross-sectional view of the cross-sectional shape of the steel wire wound by the resistance spring of the present invention is rectangular;

fig. 9 is a three-dimensional schematic view of the resistance spring after the inner circle and the outer circle of the utility model are both ground.

The following describes the push-out trigger spring clutch according to the present invention with reference to the accompanying drawings.

Detailed Description

Example 1

Fig. 1 is a three-dimensional schematic view of an appearance of an embodiment 1 of the extrapolated trigger type spring clutch of the present invention, fig. 2 is a schematic cross-sectional view of embodiment 1 of the present invention, and fig. 3 is an exploded three-dimensional schematic view of a trigger mechanism of embodiment 1 of the present invention; in the figure, 1 is an inner shaft, 2 is an outer shaft, 3 is an inner bearing, 4 is an outer bearing, 5 is a trigger mechanism, 5-1 is a trigger ring, 5-2 is a return spring, 5-3 is a flat bearing, 5-4 is a push rod, 5-5 is an electric screw rod, and 6 is a resistance spring. As can be seen from the figure, the extrapolation trigger type spring clutch of the utility model comprises an inner shaft 1, an outer shaft 2, an inner bearing 3, an outer bearing 4, a trigger mechanism 5 and a resistance spring 6; the inner shaft 1 is a cylinder; the outer shaft 2 is a hollow shaft and is sleeved on the outer circle of the inner shaft, one end of the outer shaft is fixed on the inner shaft through an inner bearing 3, and the other end of the outer shaft is sleeved with an outer bearing 4; the trigger mechanism 5 is arranged on one side of an outer shaft sleeve provided with an outer bearing and comprises a trigger ring 5-1, a return spring 5-2, a flat plate bearing 5-3, a push rod 5-4 and an electric screw rod 5-5; the trigger ring 5-1, the flat bearing 5-3 and the push rod 5-4 are sequentially arranged on the inner shaft from left to right, and respective inner circles are in sliding fit with the outer circle of the inner shaft; the triggering ring 5-1 is of a flange structure, the outer circle of a pipe part of the triggering ring is matched with the inner circle of the outer shaft, part of the triggering ring is inserted between the inner circle of the outer shaft and the outer circle of the inner shaft, and the front end of the pipe part is provided with an inclined cylindrical surface which inclines 45 degrees to the upper right; the reset spring 5-2 is arranged between the right side of the outer shaft and the positive side of the triggering ring disk part; the electric screw rod 5-5 is sleeved at the tail end of the outer side of the push rod, and the push rod and the electric screw rod do not rotate along with the inner shaft; the electric screw rod pushes the push rod to move leftwards and pushes the trigger ring to move leftwards through the flat bearing; the resistance spring is a close-packed spring wound anticlockwise, is sleeved between an inner bearing on the inner shaft and the trigger ring, and has the inner diameter and the outer diameter respectively matched with the outer circle of the inner shaft and the inner circle of the outer shaft in a sliding manner; bearing rings are respectively welded at two ends of the resistance spring, the bearing rings are circular rings with rectangular cross sections, and the inner diameters and the outer diameters of the bearing rings are respectively matched with the inner diameters and the outer diameters of the resistance spring; the left end of the resistance spring is fixed on the inner side of the inner bearing, and the right end is provided with an inclined cylindrical surface which inclines 45 degrees towards the left lower side. In the embodiment 1 of the spring clutch triggered by extrapolation of the present invention, the inner shaft is the driving shaft and the outer shaft is the driven shaft. When the electric screw rod is not opened, the trigger ring moves rightwards under the action of the return spring and does not have any action on the resistance spring, and the rotation of the inner shaft is independent relative to the outer shaft, and vice versa. At the moment, the driving shaft and the driven shaft are in a separated state, and both the driving shaft and the driven shaft can rotate relatively without any power transmission. Under the condition of driving shaft clockwise turning (under the condition of power transmission promptly), open electronic lead screw, electronic lead screw promotes the push rod and overcomes reset spring's elastic force and removes left to promote to trigger the ring through flat bearing and remove left, make the oblique cylinder of triggering the looped pipeline portion front end and the contact of the oblique cylinder of resistance spring right-hand member, thereby prevent that the resistance spring is rotatory along with interior axle (driving shaft promptly). Therefore, the resistance spring is in a clockwise torsion state, the resistance spring generates a radial expansion under the condition that the left side and the right side of the resistance spring twist against the self-rotation direction, the outer wall of the resistance spring is propped against the inner wall of the driven shaft, namely the resistance spring is in a radial expansion propping state. Because the resistance spring is in sliding fit with the driven shaft, the clearance is small, and the resistance spring is completely tensioned and pressed on the inner wall of the driven shaft after the diameter of the resistance spring is expanded ring by ring, so that the driven shaft and the driving shaft are driven to rotate clockwise. At the moment, the driving shaft and the driven shaft are pressed against the inner wall of the driven shaft by the whole expansion of the resistance spring to form friction force transmission torque, so that large torque load can be borne. In addition, under the condition that most of torque of the resistance spring is transmitted to the driven shaft, the torque borne by the trigger ring is relatively small and can be borne completely. When the electric screw rod stops working, the reset spring pushes the trigger ring to move rightwards to leave the resistance spring, the resistance spring recovers free rotation, and power transmission is separated. The utility model discloses extrapolate and trigger formula spring clutch in order to trigger the less moment that the ring bore, realize great power transmission's control between driving shaft and the driven shaft for the process of joint or disconnected power is all comparatively steady and controllable. And the triggering of the resistance spring actually stops the rotation of the movable end of the resistance spring, so that the structure of the whole clutch is simpler, and the manufacturing cost is greatly reduced. Because the utility model discloses with trigger mechanism for pass the structure and set up at the inner shaft excircle, consequently, call it as extrapolation trigger formula spring clutch.

Example 2

Fig. 4 is a schematic cross-sectional view of embodiment 2 of the push-out trigger spring clutch of the present invention, in which 1 is an inner shaft, 2-1 is an outer shaft i, 2-2 is an outer shaft ii, 3 is an inner bearing, 4 is an outer bearing, 5 is a trigger mechanism, 5-1 is a trigger ring, 5-2 is a return spring, 5-3 is a plate bearing, 5-4 is a push rod, 5-5 is an electric lead screw, and 6 is a resistance spring. As can be seen from the figure, in the embodiment 2 of the extrapolated triggering spring clutch of the present invention, the outer shaft 2 is a two-stage structure, and the two-stage outer shaft is sleeved on the outer circle of the inner shaft 1, and the outer ends of the two-stage outer shaft are fixed on the inner shaft through the inner bearings 3, respectively, and the inner ends are sleeved with the outer bearings 4; in addition, the left end of the resistance spring 6 is fixed on the inner side of the inner bearing or the left end of the inner wall of the left-section outer shaft. In the embodiment 2, the outer shaft in the embodiment 1 is divided into two sections from the middle, namely an outer shaft I and an outer shaft II; meanwhile, the right end of the resistance spring is fixed on the inner side of the inner bearing or the left end of the inner wall of the left section outer shaft; the rest are the same as in example 1. The embodiment 2 of the utility model provides a after being divided into the two-stage section with the outer axle, can realize more power transmission modes. For example: when the left end of the resistance spring is fixed on the inner side of the inner bearing, the inner shaft can be used as a driving shaft, and the outer shaft I and the outer shaft II are respectively used as a driven shaft I and a driven shaft II and are respectively connected with different mechanisms. Under the condition that the driving shaft rotates clockwise, the electric screw rod is started, the electric screw rod pushes the trigger ring to move leftwards, and the clockwise rotation of the resistance spring is prevented; the resistance spring will be in and expand footpath and support the process of pressing for driven shaft I and driven shaft II rotate along with the driving shaft is together, because driven shaft I and driven shaft II are connected with different mechanisms respectively, can realize different operations. The following steps are repeated: when the left end of resistance spring was fixed at the left end of the outer axle inner wall of left section, regarded outer axle II (be the outer axle of left section) as the driving shaft, outer axle I regarded as the driven shaft. When the outer shaft II rotates clockwise, the resistance spring is driven to rotate clockwise; at the moment, the electric screw rod is started, the electric screw rod pushes the trigger ring to move leftwards, and the clockwise rotation of the resistance spring is prevented; the resistance spring is in the process of expanding and pressing, so that the outer shaft II and the outer shaft I rotate together, namely, the driving shaft and the driven shaft rotate together, and power transmission is realized. In this case, the inner shaft does not rotate, and can be used as a fixed shaft as a base for mounting and positioning the clutch, thereby further simplifying the overall structure.

Example 3

Fig. 5 is a schematic sectional view of embodiment 3 of the push-out trigger spring clutch of the present invention, in which 1 is an inner shaft, 2-1 is an outer shaft i, 2-2 is an outer shaft ii, 3-1 is an inner bearing i, 3-2 is an inner bearing ii, 4-1 is an outer bearing i, 4-2 is an outer bearing ii, 5-1-1 is a trigger ring i, 5-1-2 is a trigger ring ii, 5-3-1 is a plate bearing i, 5-3-2 is a plate bearing ii, 5-4 is a push rod, 5-5 is an electric lead screw, 6-1 is a resistance spring i, and 6-2 is a resistance spring ii. As can be seen from the figure, the embodiment 3 of the present invention is a further modification on the basis of the embodiment 2, including that the triggering mechanism 5 is arranged in the axial middle of the inner shaft 1; the push rod 5-4 is sleeved in the middle of the inner shaft; the electric screw rod 5-5 is sleeved on the outer side of the push rod, and the push rod and the electric screw rod do not rotate along with the inner shaft; the two flat bearings 5-3 are respectively arranged on two sides of the push rod; the two trigger rings 5-1 are respectively arranged at two ends of the push rod; the two reset springs are respectively sleeved between the end face of the inner side of the outer shaft and the positive side of the triggering ring disk part; the two resistance springs are respectively sleeved between the left outer shaft and the inner shaft and the outer ends of the two resistance springs are respectively fixed on the inner sides of the inner bearings of the left outer shaft and the right outer shaft; the electric screw rod can keep the middle part of the push rod in the middle part of the electric screw rod, push the push rod to move towards the left resistance spring and push the push rod to move towards the right resistance spring. The embodiment 3 of the utility model provides an outer axle I and outer axle II are cut apart into at the outer axle, also cut apart into resistance spring I and resistance spring II with the resistance spring, have formed two sets of clutching mechanism under the control of a trigger mechanism, in this embodiment 3, interior axle is the driving shaft, outer axle I and outer axle II are driven shaft I and driven shaft II respectively, and driven shaft I and driven shaft II are connected with different mechanisms respectively, and resistance spring I and resistance spring II then correspond driven shaft I and driven shaft II respectively. Under the condition that the driving shaft rotates clockwise, when the middle part of the push rod is kept at the middle part of the electric screw rod by the electric screw rod, the triggering ring I and the triggering ring II are not contacted with the resistance spring, and the inner shaft is in a free idle state; when the electric screw rod pushes the push rod to move towards the left resistance spring, the trigger ring I prevents the resistance spring I from rotating clockwise; the resistance spring I is in the process of expanding and pressing, so that the driven shaft I rotates along with the driving shaft; namely, the driving shaft and the driven shaft I realize power transmission; when the electric screw rod pushes the push rod to move towards the right resistance spring, the trigger ring II prevents the resistance spring II from rotating clockwise; the resistance spring II is in the process of expanding diameter and resisting pressure, so that the driven shaft II rotates along with the driving shaft; namely, the driving shaft and the driven shaft II realize power transmission. Because driven shaft I and driven shaft II are connected with different mechanisms respectively, can realize different operations. Obviously, the best corresponding structure of this embodiment 3 is the transmission of the electric vehicle, that is, the three operating states of the electric screw not being turned on, the electric screw being turned on in the forward direction, and the electric screw being turned on in the reverse direction correspond to the neutral gear, the low gear, and the high gear of the electric vehicle, respectively.

Fig. 6 is a three-dimensional schematic diagram of two resistance springs according to the present invention, in which 5 is a resistance spring, a is a carrier ring, a is a first resistance spring, and b is a second resistance spring. As can be seen from the figure, in order to improve the power transmission load of the present invention, the two resistance springs are provided, and the pitch of the resistance springs is larger than the diameter of the steel wire for winding the resistance springs, and is arranged at 180 degrees on the circumference. Therefore, when the resistance springs are expanded and pressed, two springs are expanded and pressed on the inner wall of the outer shaft, and the bearing capacity can be improved.

Fig. 7 is a three-dimensional schematic diagram of the resistance springs of the present invention, in which 5 is a resistance spring, a is a bearing ring, a is a first resistance spring, b is a second resistance spring, and c is a third resistance spring. As can be seen, in order to increase the power transmission load, the number of the resistance springs is three, and the pitch of the resistance springs is larger than twice the diameter of the wire around which the resistance springs are wound, and is arranged at 120 degrees on the circumference. Therefore, when the resistance springs are expanded and pressed, three springs are expanded and pressed on the inner wall of the outer shaft, and the bearing capacity can be improved.

Fig. 8 is a schematic cross-sectional view of the resistance spring wound steel wire of the present invention with a rectangular cross-sectional shape. In the figure, 5 is a resistance spring. As can be seen from the figure, in order to further improve the power transmission load of the present invention, the cross-sectional shape of the wound wire of the resistance spring is rectangular. So, can effectively improve and expand the footpath and support the friction area of pressing time resistance spring and outer axle inner wall, improve frictional force to improve moment of torsion and bear the load.

Fig. 9 is a three-dimensional schematic diagram of the resistance spring after the inner circle and the outer circle of the utility model are both ground, and in the diagram, 5 is the resistance spring I. The key part in the spring clutch is a resistance spring, and particularly, the matching parameters of the resistance spring and other parts have great influence on the sensitivity and reliability of the spring clutch. Preferably, the total fit clearance between the inner circle of the resistance spring and the outer circle of the inner shaft is less than 0.10mm, and the total fit clearance between the outer circle of the resistance spring and the inner circle of the outer shaft is 0.20 mm-0.50 mm. In order to ensure the dimensional accuracy and surface smoothness of the inner circle and the outer circle of the resistance spring, the resistance spring is a structure with high dimensional progress and high surface smoothness, wherein the inner circle and the outer circle of the resistance spring are both ground.

Obviously, the utility model discloses the useful technological effect that extrapolates and triggers formula spring clutch is simple structure, and manufacturing cost is lower to, the process of joint or break-off power is all comparatively steady and controllable.

Claims

1. An outward push trigger type spring clutch is characterized by comprising an inner shaft, an outer shaft, an inner bearing, an outer bearing, a trigger mechanism and a resistance spring; the inner shaft is a cylinder; the outer shaft is a hollow shaft and is sleeved on the outer circle of the inner shaft, one end of the outer shaft is fixed on the inner shaft through an inner bearing, and the other end of the outer shaft is sleeved with an outer bearing; the trigger mechanism is arranged on one side of an outer shaft sleeve which is provided with an outer bearing and comprises a trigger ring, a return spring, a flat plate bearing, a push rod and an electric screw rod; the trigger ring, the flat bearing and the push rod are sequentially arranged on the inner shaft from left to right, and respective inner circles are in sliding fit with the outer circle of the inner shaft; the trigger ring is of a flange structure, the outer circle of a pipe part of the trigger ring is matched with the inner circle of the outer shaft, part of the trigger ring is inserted between the inner circle of the outer shaft and the outer circle of the inner shaft, and the front end of the pipe part is provided with an inclined cylindrical surface which inclines upwards and rightwards by 45 degrees; the reset spring is installed between the right side of the outer shaft and the positive side of the triggering annular disc part; the electric screw rod is sleeved at the tail end of the outer side of the push rod, and the push rod and the electric screw rod do not rotate along with the inner shaft; the electric screw rod pushes the push rod to move leftwards and pushes the trigger ring to move leftwards through the flat bearing; the resistance spring is a close-packed spring wound anticlockwise, is sleeved between an inner bearing on the inner shaft and the trigger ring, and has the inner diameter and the outer diameter respectively matched with the outer circle of the inner shaft and the inner circle of the outer shaft in a sliding manner; bearing rings are respectively welded at two ends of the resistance spring, the bearing rings are circular rings with rectangular cross sections, and the inner diameters and the outer diameters of the bearing rings are respectively matched with the inner diameters and the outer diameters of the resistance spring; the left end of the resistance spring is fixed on the inner side of the inner bearing, and the right end is provided with an inclined cylindrical surface which inclines 45 degrees to the left lower side.

2. The outward-pushing trigger type spring clutch according to claim 1, wherein the outer shaft is of a two-section structure, the two-section outer shaft is sleeved on the outer circle of the inner shaft, the outer ends of the two-section outer shaft are fixed on the inner shaft through inner bearings respectively, and the inner end is sleeved with the outer bearing; in addition, the left end of the resistance spring is fixed on the inner side of the inner bearing or the left end of the inner wall of the left-section outer shaft.

3. The extrapolated trigger spring clutch of claim 2, wherein the trigger mechanism is disposed axially midway of the inner shaft; the push rod is sleeved in the middle of the inner shaft; the electric screw rod is sleeved outside the push rod, and the push rod and the electric screw rod do not rotate along with the inner shaft; the two flat plate bearings are respectively arranged on two sides of the push rod; the two trigger rings are respectively arranged at the two ends of the push rod; the two reset springs are respectively sleeved between the end face of the inner side of the outer shaft and the positive side of the triggering ring disk part; the two resistance springs are respectively sleeved between the left outer shaft and the inner shaft and the outer ends of the two resistance springs are respectively fixed on the inner sides of the inner bearings of the left outer shaft and the right outer shaft; the electric screw rod can keep the middle part of the push rod in the middle part of the electric screw rod, push the push rod to move towards the left resistance spring and push the push rod to move towards the right resistance spring.

4. The push-out trigger spring clutch according to any one of claims 1 to 3, wherein the resistance spring has two pieces and has a pitch larger than the diameter of the wire around which the resistance spring is wound and is circumferentially arranged at 180 degrees.

5. The extrapolated trigger spring clutch of any one of claims 1-3, wherein the number of resistance springs is three, and the pitch of the resistance springs is two times larger than the diameter of the wire wound with the resistance springs and is arranged at 120 degrees on the circumference.

6. The extrapolated trigger spring clutch of any one of claims 1-3, wherein the cross-sectional shape of the wound wire of the resistance spring is rectangular.

7. The extrapolated trigger-type spring clutch of any one of claims 1-3, wherein the total fit clearance between the inner circle of the resistance spring and the outer circle of the inner shaft is less than 0.10mm, and the total fit clearance between the outer circle of the resistance spring and the inner circle of the outer shaft is 0.20 mm-0.50 mm.

8. The extrapolated trigger-type spring clutch of any one of claims 1-3, wherein the resistance spring is a high dimensional schedule, high surface finish structure with both inner and outer circles ground.