阅读说明：本技术 一种发动机同步器机构 (Engine synchronizer mechanism ) 是由 葛锐 朱文军 辛雪军 张军瑞 胡志胜 李健 朱保林 朱振东 于 2020-08-14 设计创作，主要内容包括：本发明提供了一种发动机同步器机构,包括传动轴,传动轴上沿轴向从左向右依次套装有主动部件、活动座和从动部件,主动部件包括主动轴套和主动轮,主动轴套的一端转动套装在传动轴上、另一端向右延伸形成延伸筒；活动座滑动套装在传动轴上,活动座与延伸筒内壁之间通过多个连杆组件实现接合或脱离,当活动座向左移动至左极限位置时,活动座会带动多个连杆组件动作,使多个连杆组件与延伸筒相接合,并通过定位锁紧装置对活动座的左极限位置进行定位锁紧；当活动座向右移动至右极限位置时,活动座带动多个连杆组件动作,使多个连杆组件与延伸筒相脱离,并通过复位装置实现活动座保持在右极限位置上。本发明的优点：能实现快速接合或脱开。(The invention provides an engine synchronizer mechanism which comprises a transmission shaft, wherein a driving part, a movable seat and a driven part are sequentially sleeved on the transmission shaft from left to right along the axial direction, the driving part comprises a driving shaft sleeve and a driving wheel, one end of the driving shaft sleeve is rotatably sleeved on the transmission shaft, and the other end of the driving shaft sleeve extends rightwards to form an extension cylinder; the movable seat is slidably sleeved on the transmission shaft, the movable seat is connected with or separated from the inner wall of the extension cylinder through the connecting rod assemblies, when the movable seat moves leftwards to a left limit position, the movable seat drives the connecting rod assemblies to move, so that the connecting rod assemblies are connected with the extension cylinder, and the left limit position of the movable seat is positioned and locked through the positioning and locking device; when the movable seat moves rightwards to the right limit position, the movable seat drives the connecting rod assemblies to move, so that the connecting rod assemblies are separated from the extension barrel, and the movable seat is kept at the right limit position through the resetting device. The invention has the advantages that: quick engagement or disengagement can be achieved.)

1. The utility model provides an engine synchronizer mechanism, includes transmission shaft (1), establishes the axial of transmission shaft (1) and is left right direction, its characterized in that: the transmission shaft (1) is sequentially sleeved with a driving part, a movable seat (2) and a driven part from left to right along the axial direction, and the driven part is fixedly sleeved on the transmission shaft (1);

the driving part comprises a driving shaft sleeve (4) and a driving wheel (5) which are fixedly sleeved inside and outside, one end of the driving shaft sleeve (4) is rotatably sleeved on the transmission shaft (1), the other end of the driving shaft sleeve (4) extends rightwards to form an extension cylinder (7), and a gap is formed between the inner side wall of the extension cylinder (7) and the main shaft;

the movable seat (2) is slidably sleeved on the transmission shaft (1) and can slide along the axial direction of the transmission shaft (1), the circumferential limiting structure is used for limiting the circumferential rotation of the movable seat (2) relative to the transmission shaft (1), the movable seat (2) and the inner wall of the extension cylinder (7) of the active shaft sleeve (4) are jointed or separated through a plurality of connecting rod assemblies uniformly distributed along the circumferential direction, when the movable seat (2) moves to the left limit position leftwards, the movable seat (2) can drive the connecting rod assemblies to act, so that the connecting rod assemblies are jointed with the extension cylinder (7) of the active shaft sleeve (4), and the left limit position of the movable seat (2) is positioned and locked through the positioning and locking device; when the movable seat (2) moves rightwards to the right limit position, the movable seat (2) drives the connecting rod assemblies to act, so that the connecting rod assemblies are separated from the extending cylinder (7) of the driving shaft sleeve (4), and the movable seat (2) is kept at the right limit position in a natural state through the resetting device.

2. An engine synchronizer mechanism as recited in claim 1, wherein: the connecting rod assembly comprises a push-pull rod (12), a first connecting rod (13), a second connecting rod (14) and a friction block (15), the push-pull rod (12) is fixedly arranged at the left end of the movable seat (2) and extends leftwards along the left-right direction, the left end of the push-pull rod (12) is hinged with the first connecting rod (13), the inner end of the first connecting rod (13) is hinged with the outer end of the second connecting rod (14), the inner end of the second connecting rod (14) is hinged on the transmission shaft (1), the outer end of the first connecting rod (13) is hinged with the inner end of the friction block (15), the shape of the outer end face of the friction block (15) is matched with the shape of the inner side wall of the extension cylinder (7), an installation groove (16) for installing the friction block (15) is formed in the inner side wall of the extension cylinder (7); when the movable seat (2) moves leftwards, the push-pull rod (12) on the movable seat (2) pushes the first connecting rod (13) leftwards, so that the first connecting rod (13) and the second connecting rod (14) act to drive the friction block (15) to expand outwards along the radial direction so as to be attached to the inner side wall of the extension cylinder (7), and the movable seat (2) is connected with the extension cylinder (7); when the movable seat (2) moves rightwards, the push-pull rod (12) on the movable seat (2) pulls the first connecting rod (13) rightwards, so that the first connecting rod (13) and the second connecting rod (14) act, the friction block (15) is driven to contract inwards in the radial direction to be separated from the inner side wall of the extension cylinder (7), and the movable seat (2) is separated from the extension cylinder (7).

3. An engine synchronizer mechanism as recited in claim 1, wherein: the positioning and locking device comprises a first positioning and locking device, the first positioning and locking device comprises a plurality of first locking units, the first locking units are uniformly distributed along the circumferential direction of the extension cylinder (7), and each locking unit comprises a first locking groove (17), a first locking spring (18) and a locking ball (19);

a circle of annular limiting groove (20) is formed in the right end face of the extending cylinder (7), a circle of annular limiting block (21) is arranged at the left end of the movable seat (2), the annular limiting block (21) extends into the annular limiting groove (20) and can move left and right in the annular limiting groove (20), and the left end face of the annular limiting block (21) is matched with the bottom wall of the annular limiting groove (20) to limit the left limit position of the movable seat (2);

extend and have a plurality of first locking grooves (17) along the circumference equipartition on annular spacing groove (20) inside wall of a section of thick bamboo (7), the axis of first locking groove (17) is along the radial extension of extending a section of thick bamboo (7), all is provided with first locking spring (18) and locking ball (19) of arranging inside and outside every first locking groove (17), supports locking ball (19) elasticity through first locking spring (18) and presses on annular stopper (21) inside wall, open on annular stopper (21) inside wall have with locking ball (19) complex locking recess, when activity seat (2) are located left extreme position, locking ball (19) are just in time embedded into the locking recess of annular stopper (21) and are realized the locking.

4. An engine synchronizer mechanism as recited in claim 3, wherein: the positioning and locking device further comprises a second positioning and locking device, the second positioning and locking device comprises a plurality of second locking units, the second locking units are uniformly distributed along the circumferential direction of the transmission shaft (1), each second locking unit comprises a locking arm (22), a second locking spring (23) and a spring guide pin (24), the left end face of the movable seat (2) positioned inside the annular limiting block (21) is a circular truncated cone-shaped locking conical surface (25), the locking arm (22) is positioned on the left side of the locking conical surface (25) of the movable seat (2), the middle part of the locking arm (22) is hinged on the transmission shaft (1), the spring guide pin (24) extending towards the transmission shaft (1) is arranged on the inner side of the left section of the locking arm (22), the second locking spring (23) is sleeved on the spring guide pin (24), under the elastic action of the second locking spring (23), the right end of the locking arm (22) is always pressed on the locking conical surface (25) of the movable seat (2), the left end of locking arm (22) inboard is equipped with inside outstanding jack catch (26), is equipped with on transmission shaft (1) with jack catch (26) matched with draw-in groove (27), when movable seat (2) are located left extreme position, in jack catch (26) of locking arm (22) just in time imbed draw-in groove (27) on transmission shaft (1) to restriction movable seat (2) continue to move left.

5. An engine synchronizer mechanism as recited in claim 1, wherein: the transmission shaft (1) is provided with a right limiting ring (28), and the right limiting ring (28) is matched with the right limiting ring (2) through the right end of the movable seat (2) to limit the right limiting position of the movable seat (2).

6. An engine synchronizer mechanism as recited in claim 1, wherein: resetting means includes reset spring (9), sliding seat (2) lateral wall is cylindric structure, reset spring (9) suit is on the lateral wall of sliding seat (2), and the left end of reset spring (9) supports and presses on the right-hand member of extending a section of thick bamboo (7), and the right-hand member of reset spring (9) supports and presses on fender ring (10) of sliding seat (2) right-hand member.

7. An engine synchronizer mechanism as recited in claim 6, wherein: and a thrust bearing (11) is arranged at the right end of the extension cylinder (7) at a position corresponding to the return spring (9).

8. An engine synchronizer mechanism as recited in claim 1, wherein: the circumferential limiting structure is specifically set as follows: the movable seat (2) is connected with the transmission shaft (1) by a spline (8).

Technical Field

The invention relates to the technical field of mechanical transmission, in particular to an engine synchronizer mechanism.

Background

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide an engine synchronizer mechanism which is safe and reliable, has a stable working state and can realize quick engagement or disengagement.

In order to achieve the purpose, the invention adopts the following technical scheme:

an engine synchronizer mechanism comprises a transmission shaft, wherein the axial direction of the transmission shaft is the left-right direction, a driving part, a movable seat and a driven part are sequentially sleeved on the transmission shaft from left to right along the axial direction, and the driven part is fixedly sleeved on the transmission shaft;

the driving part comprises a driving shaft sleeve and a driving wheel which are fixedly sleeved inside and outside, one end of the driving shaft sleeve is rotatably sleeved on the transmission shaft, the other end of the driving shaft sleeve extends rightwards to form an extension cylinder, and a gap is formed between the inner side wall of the extension cylinder and the main shaft;

the movable seat is slidably sleeved on the transmission shaft and can slide along the axial direction of the transmission shaft, the circumferential rotation of the movable seat relative to the transmission shaft is limited through a circumferential limiting structure, the movable seat is jointed with or separated from the inner wall of the extension cylinder of the driving shaft sleeve through a plurality of connecting rod assemblies which are uniformly distributed along the circumferential direction, when the movable seat moves to the left limit position leftwards, the movable seat can drive the connecting rod assemblies to act, so that the connecting rod assemblies are jointed with the extension cylinder of the driving shaft sleeve, and the left limit position of the movable seat is positioned and locked through the positioning and locking device; when the movable seat moves rightwards to the right limit position, the movable seat drives the connecting rod assemblies to move, so that the connecting rod assemblies are separated from the extending cylinder of the driving shaft sleeve, and the movable seat is kept at the right limit position in a natural state through the resetting device.

Furthermore, the connecting rod assembly comprises a push-pull rod, a first connecting rod, a second connecting rod and a friction block, the push-pull rod is fixedly arranged at the left end of the movable seat and extends leftwards along the left-right direction, the left end of the push-pull rod is hinged with the first connecting rod, the inner end of the first connecting rod is hinged with the outer end of the second connecting rod, the inner end of the second connecting rod is hinged on the transmission shaft, the outer end of the first connecting rod is hinged with the inner end of the friction block, the shape of the outer end face of the friction block is matched with the shape of the inner side wall of the extension cylinder, an installation groove for installing the friction block is formed in the; when the movable seat moves leftwards, the push-pull rod on the movable seat pushes the first connecting rod leftwards, so that the first connecting rod and the second connecting rod act to drive the friction block to expand outwards along the radial direction so as to be attached to the inner side wall of the extension cylinder, and the movable seat is connected with the extension cylinder; when the movable seat moves rightwards, the push-pull rod on the movable seat can pull the first connecting rod rightwards, so that the first connecting rod and the second connecting rod act to drive the friction block to contract inwards along the radial direction so as to be separated from the inner side wall of the extension cylinder, and the separation of the movable seat and the extension cylinder is realized.

Furthermore, the positioning and locking device comprises a first positioning and locking device, the first positioning and locking device comprises a plurality of first locking units, the plurality of first locking units are uniformly distributed along the circumferential direction of the extension cylinder, and each locking unit comprises a first locking groove, a first locking spring and a locking ball;

the left end face of the annular limiting block is matched with the bottom wall of the annular limiting groove, so that the left limiting position of the movable seat is limited;

extend and have a plurality of first locking grooves along the circumference equipartition on the annular spacing inslot wall of a section of thick bamboo, the axis in first locking groove is along the radial extension of extending a section of thick bamboo, and every first locking inslot all is provided with inside and outside first locking spring and the locking ball of arranging, supports locking ball elasticity through first locking spring and presses on the annular stopper inside wall, open on the annular stopper inside wall have with locking ball complex locking recess, when the sliding seat is located left extreme position, locking ball just in time imbeds and realizes locking to the locking recess of annular stopper in.

Furthermore, the positioning and locking device further comprises a second positioning and locking device, the second positioning and locking device comprises a plurality of second locking units, the plurality of second locking units are uniformly distributed along the circumferential direction of the transmission shaft, each second locking unit comprises a locking arm, a second locking spring and a spring guide pin, the left end surface of the movable seat positioned in the annular limiting block is a truncated cone-shaped locking conical surface, the locking arm is positioned on the left side of the locking conical surface of the movable seat, the middle part of the locking arm is hinged on the transmission shaft, the inner side of the left section of the locking arm is provided with the spring guide pin extending towards the transmission shaft, the second locking spring is sleeved on the spring guide pin, under the elastic force action of the second locking spring, the right end of the locking arm is always pressed on the locking conical surface of the movable seat, the inner side of the left end of the locking arm is provided with an inward protruding clamping jaw, and the transmission shaft is provided, when the movable seat is located at the left limit position, the clamping jaws of the locking arms are just embedded into the clamping grooves in the transmission shaft, so that the movable seat is limited to continuously move leftwards.

Furthermore, be equipped with right spacing ring on the transmission shaft, cooperate through sliding seat right-hand member and right spacing ring, realize spacing the right extreme position of sliding seat.

Further, resetting means includes reset spring, the sliding seat lateral wall is cylindric structure, reset spring suit is on the lateral wall of sliding seat, and reset spring's left end supports to press on the right-hand member of an extension section of thick bamboo, and reset spring's right-hand member supports to press on the fender ring of sliding seat right-hand member.

Furthermore, a thrust bearing is arranged at the position, corresponding to the return spring, of the right end of the extension cylinder.

Further, circumference limit structure specifically sets up to: the movable seat is connected with the transmission shaft through a spline.

Compared with the prior art, the invention has the beneficial effects that:

1. according to the engine synchronizer mechanism provided by the invention, the movable seat is pushed to slide left and right on the transmission shaft, and the movable seat drives the connecting rod assembly to move, so that the connecting rod assembly can be jointed with or separated from the inner side wall of the extension cylinder of the driving shaft sleeve, and further, the driving part and the driven part can be quickly jointed or separated; meanwhile, the invention adopts the positioning and locking device to position and lock the movable seat in the joint state, and adopts the reset device to ensure that the movable seat in the disengagement state is kept at the position of the disengagement state, thereby improving the stability and reliability of the whole mechanism.

2. The invention provides an engine synchronizer mechanism, wherein a connecting rod assembly of the engine synchronizer mechanism is composed of a push-pull rod fixed on a movable seat, a first connecting rod hinged with a friction block, a second connecting rod hinged on a transmission shaft and the friction block embedded in an installation groove in the inner side wall of an extension cylinder, and the corresponding connecting rod can be driven to act by the left-right movement of the movable seat, so that the engagement or the disengagement of the friction block and the inner side wall of the extension cylinder is realized.

3. The positioning locking device of the engine synchronizer mechanism provided by the invention adopts two locking structures, wherein one locking structure is that the locking ball is matched with the locking groove, and the other locking structure is that the claw of the locking arm is matched with the clamping groove on the transmission shaft, so that double locking can be realized, the locking effect is good, the reliability and the safety of the joint state are ensured, and accidents caused by sudden separation of the whole mechanism in the rotating operation process can be avoided.

4. According to the engine synchronizer mechanism provided by the invention, the movable seat is connected with the transmission shaft through the spline, so that the large transmission torque can be realized, the power loss such as slipping is avoided, the mechanism is suitable for devices with multiple functional accessories and large power demand, the transmission precision is ensured, the noise is reduced, and the reliability and the stability of the mechanism are improved.

Drawings

Fig. 1 is a perspective view of the present invention.

Fig. 2 is a perspective semi-sectional view of the present invention.

Fig. 3 is an enlarged view of a portion of the second locking unit of fig. 2.

Fig. 4 is a longitudinal sectional view of the present invention.

Fig. 5 is an enlarged view of a portion of the first locking unit of fig. 4.

Fig. 6 is a sectional view taken along line a-a in fig. 4.

Fig. 7 is a sectional view taken along line B-B in fig. 4.

In the figure, 1 a transmission shaft; 2, a movable seat; 3, a driven wheel; 4, driving shaft sleeve; 5, driving wheels; 6 rolling bearings; 7 extending the cylinder; 8, splines; 9 a return spring; 10, a baffle ring; 11 a thrust bearing; 12 a push-pull rod; 13 a first link; 14 a second link; 15 a friction block; 16, mounting grooves; 17 a first locking groove; 18 a first locking spring; 19 a locking ball; 20 annular limiting grooves; 21 an annular limiting block; 22 a locking arm; 23 a second locking spring; 24 spring guide pins; 25 locking the conical surface; 26 claws; 27 card slots; 28 right stop collar.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 to 7, the present embodiment discloses an engine synchronizer mechanism, which includes a transmission shaft 1, wherein an axial direction of the transmission shaft 1 is set as a left-right direction, a driving part, a movable seat 2 and a driven part are sequentially sleeved on the transmission shaft 1 from left to right along the axial direction, the driven part is a driven wheel 3 in the present embodiment, and the driven wheel 3 is fixedly sleeved on the transmission shaft 1.

The driving part comprises a driving shaft sleeve 4 and a driving wheel 5 which are fixedly sleeved inside and outside, one end of the driving shaft sleeve 4 is rotatably sleeved on the transmission shaft 1 through a rolling bearing 6, the other end of the driving shaft sleeve 4 extends rightwards to form an extension cylinder 7, and a gap is formed between the inner side wall of the extension cylinder 7 and the main shaft.

Sliding sleeve of sliding seat 2 is on transmission shaft 1 and can be along transmission shaft 1's endwise slip to through circumference limit structure restriction sliding seat 2 for transmission shaft 1's circumferential direction, circumference limit structure specifically sets up to: the movable seat 2 is connected with the transmission shaft 1 through a spline 8, so that the movable seat 2 can only axially move relative to the transmission shaft 1 and cannot circumferentially rotate.

The movable seat 2 is connected with or separated from the inner wall of the extension cylinder 7 of the driving shaft sleeve 4 through a plurality of connecting rod assemblies which are uniformly distributed along the circumferential direction, and four connecting rod assemblies are adopted in the embodiment. When the movable seat 2 moves leftwards to the left limit position, the movable seat 2 drives the connecting rod assemblies to act, so that the connecting rod assemblies are jointed with the extension cylinder 7 of the driving shaft sleeve 4, and the left limit position of the movable seat 2 is positioned and locked through the positioning and locking device; when sliding seat 2 moved right extreme position, sliding seat 2 drove a plurality of link assembly actions, make a plurality of link assembly break away from with the extension section of thick bamboo 7 of initiative axle sleeve 4 mutually, and realize through resetting means that sliding seat 2 keeps on right extreme position under natural state, resetting means includes reset spring 9, 2 lateral walls of sliding seat are cylindric structure, reset spring 9 suit is on the lateral wall of sliding seat 2, reset spring 9's left end supports and presses on the right-hand member of extending a section of thick bamboo 7, reset spring 9's right-hand member supports and presses on the fender ring 10 of 2 right-hand members of sliding seat. The right end of the extension cylinder 7 is provided with a thrust bearing 11 at a position corresponding to the return spring 9, and the thrust bearing 11 is arranged to bear the axial elastic force of the return spring 9 and prevent the return spring 9 from rotating along with the rotation of the driving shaft sleeve 4.

Specifically, the connecting rod assembly comprises a push-pull rod 12, a first connecting rod 13, a second connecting rod 14 and a friction block 15, wherein the push-pull rod 12 is fixedly arranged at the left end of the movable seat 2 and extends leftwards along the left-right direction, the left end of the push-pull rod 12 is hinged with the first connecting rod 13, the inner end of the first connecting rod 13 is hinged with the outer end of the second connecting rod 14, the inner end of the second connecting rod 14 is hinged on the transmission shaft 1, the outer end of the first connecting rod 13 is hinged with the inner end of the friction block 15, the shape of the outer end face of the friction block 15 is matched with the shape of the inner side wall of the extension cylinder 7, an installation groove 16 for installing the friction block 15 is formed in the; when the movable seat 2 moves leftwards, the push-pull rod 12 on the movable seat 2 pushes the first connecting rod 13 leftwards, so that the first connecting rod 13 and the second connecting rod 14 act to drive the friction block 15 to expand outwards along the radial direction so as to be attached to the inner side wall of the extension cylinder 7, and the movable seat 2 is connected with the extension cylinder 7; when the movable seat 2 moves rightwards, the push-pull rod 12 on the movable seat 2 pulls the first connecting rod 13 rightwards, so that the first connecting rod 13 and the second connecting rod 14 are actuated, and the friction block 15 is driven to contract inwards in the radial direction to be separated from the inner side wall of the extension cylinder 7, and the movable seat 2 is separated from the extension cylinder 7.

Specifically, the positioning and locking device comprises a first positioning and locking device and a second positioning and locking device.

The first positioning and locking device comprises a plurality of first locking units, and four first locking units are adopted in the embodiment. Four first locking units are uniformly distributed along the circumference of the extension cylinder 7, and each locking unit comprises a first locking groove 17, a first locking spring 18 and a locking ball 19; a circle of annular limiting groove 20 is formed in the right end face of the extension cylinder 7, a circle of annular limiting block 21 is arranged at the left end of the movable seat 2, the annular limiting block 21 extends into the annular limiting groove 20 and can move left and right in the annular limiting groove 20, and the left end face of the annular limiting block 21 is matched with the bottom wall of the annular limiting groove 20 to limit the left limit position of the movable seat 2; extend and have a plurality of first locking grooves 17 along the circumference equipartition on the annular spacing inslot 20 inside wall of a section of thick bamboo 7, the axis of first locking groove 17 is along the radial extension of an extension section of thick bamboo 7, all be provided with inside and outside first locking spring 18 and the locking ball 19 of arranging in every first locking groove 17, support locking ball 19 elasticity through first locking spring 18 and press on annular stopper 21 inside wall, open on the annular stopper 21 inside wall have with locking ball 19 complex locking recess, when the sliding seat 2 is located left extreme position, locking ball 19 just in time imbeds to realize locking in annular stopper 21's the locking recess.

The second positioning and locking device comprises a plurality of second locking units, and four second locking units are adopted in the embodiment. The four second locking units are uniformly distributed along the circumference of the transmission shaft 1, each second locking unit comprises a locking arm 22, a second locking spring 23 and a spring guide pin 24, the left end surface of the movable seat 2 positioned inside the annular limiting block 21 is a truncated cone-shaped locking conical surface 25, the locking arm 22 is positioned on the left side of the locking conical surface 25 of the movable seat 2, the middle part of the locking arm 22 is hinged on the transmission shaft 1, the spring guide pin 24 extending towards the transmission shaft 1 is arranged on the inner side of the left section of the locking arm 22, the second locking spring 23 is sleeved on the spring guide pin 24, under the elastic force action of the second locking spring 23, the right end of the locking arm 22 is always pressed on the locking conical surface 25 of the movable seat 2, the inner side of the left end of the locking arm 22 is provided with a claw 26 protruding inwards, the transmission shaft 1 is provided with a clamping groove 27 matched with the claw 26, when the movable seat 2 is positioned at the left limit position, the claw 26 of the locking arm 22 is, thereby restricting the movable seat 2 from continuing to move leftward.

Be equipped with right spacing ring 28 on the transmission shaft 1, cooperate through sliding seat 2 right-hand member and right spacing ring 28, realize spacing the right extreme position of sliding seat 2.

The during operation is installed this synchronizer mechanism in the gear room of cylinder body, and initiative axle sleeve 4 passes through the bearing and rotates and install in the cylinder body, and action wheel 5 is connected with the driving source, meshes with drive gear from driving wheel 3 mutually, realizes through this mechanism that the rapid junction of power between driving source and the drive gear or break away from, and concrete process is:

the movable seat 2 is pushed leftwards, the push-pull rod 12 at the left end of the movable seat 2 pushes the first connecting rod 13 leftwards, so that the first connecting rod 13 and the second connecting rod 14 act to drive the friction block 15 to expand outwards along the radial direction so as to be attached to the inner side wall of the extension cylinder 7, and the movable seat 2 is jointed with the extension cylinder 7; at this time, the claws 26 of each locking arm 22 are just embedded into the slots 27 on the transmission shaft 1 to limit the movable seat 2 to move leftwards continuously; meanwhile, each locking ball 19 is just embedded into each locking groove of the annular limiting block 21 to limit the left and right movement of the annular limiting block 21; through two location locking devices, realize the dual locking to sliding seat 2 at left extreme position, prevent to throw off because of accident between driving part and the driven part.

The movable seat 2 is pulled rightwards, when the resultant force of the pulling force and the elastic force of the return spring 9 is large enough, the blocking force of the locking ball 19 on the annular limiting block 21 is overcome, at the moment, the annular limiting block 21 moves rightwards, the locking ball 19 is pressed into the first locking groove 17, the movable seat 2 moves rightwards, the push-pull rod 12 on the movable seat 2 pulls the first connecting rod 13 rightwards, the first connecting rod 13 and the second connecting rod 14 move, the friction block 15 is driven to contract inwards along the radial direction so as to be separated from the inner side wall of the extension cylinder 7, and the movable seat 2 is separated from the extension cylinder 7. When the movable seat 2 moves to the right limit position, the movable seat 2 stops moving, and at the same time, the movable seat 2 is kept at the position under the action of the return spring 9. In the whole process, the right end of the locking arm 22 is always elastically pressed on the locking conical surface 25 of the movable seat 2.

The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.