Engine synchronizer mechanism

Abstract

The present invention provides an engine synchronizer mechanism, including a transmission shaft, on which an active component, a movable seat and a driven component are sequentially mounted from left to right along the axial direction, the active component includes an active shaft sleeve and a driving wheel, one end of the active shaft sleeve is rotatably mounted on the transmission shaft, and the other end extends to the right to form an extension tube; the movable seat is slidably mounted on the transmission shaft, and the movable seat and the inner wall of the extension tube are engaged or disengaged through multiple connecting rod assemblies. When the movable seat moves to the left to the left limit position, the movable seat drives multiple connecting rod assemblies to move, so that the multiple connecting rod assemblies are engaged with the extension tube, and the left limit position of the movable seat is positioned and locked by a positioning and locking device; when the movable seat moves to the right to the right limit position, the movable seat drives multiple connecting rod assemblies to move, so that the multiple connecting rod assemblies are disengaged from the extension tube, and the movable seat is kept in the right limit position by a reset device. The advantages of the present invention are: it can achieve rapid engagement or disengagement.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical transmission, and more specifically to an engine synchronizer mechanism. Background Art

[0002] In the prior art, the drive device is usually implemented using a multi-stage gear transmission mechanism, a belt transmission mechanism or a clutch mechanism. The application of these mechanisms cannot achieve rapid engagement and disengagement switching of power, and cannot provide timely protection for temporary failures in the transmission. At the same time, the mechanism is relatively complex, the overall weight increases, and the transmission efficiency is poor. In addition, the large size and high complexity of the mechanism will lead to poor reliability and a high failure rate of accessories. Summary of the invention

[0003] The purpose of the present invention is to overcome the deficiencies of the prior art and to provide an engine synchronizer mechanism which is safe and reliable, has a stable working state and can achieve rapid engagement or disengagement.

[0004] To achieve the above object, the present invention adopts the following technical solution:

[0005] An engine synchronizer mechanism comprises a transmission shaft, wherein the axial direction of the transmission shaft is the left-right direction, and a driving component, a movable seat and a driven component are sequentially mounted on the transmission shaft from left to right along the axial direction, and the driven component is fixedly mounted on the transmission shaft;

[0006] The active component includes an active shaft sleeve and an active wheel which are fixedly mounted inside and outside, one end of the active shaft sleeve is rotatably mounted on the transmission shaft, and the other end of the active shaft sleeve extends to the right to form an extension cylinder, and a gap is provided between the inner side wall of the extension cylinder and the main shaft;

[0007] The movable seat is slidably sleeved on the transmission shaft and can slide along the axial direction of the transmission shaft, and the circumferential rotation of the movable seat relative to the transmission shaft is limited by a circumferential limiting structure, and the movable seat and the inner wall of the extension tube of the active shaft sleeve are engaged or disengaged by multiple connecting rod assemblies evenly distributed along the circumference. When the movable seat moves to the left to the left extreme position, the movable seat will drive the multiple connecting rod assemblies to move, so that the multiple connecting rod assemblies are engaged with the extension tube of the active shaft sleeve, and the left extreme position of the movable seat is positioned and locked by the positioning and locking device; when the movable seat moves to the right to the right extreme position, the movable seat drives the multiple connecting rod assemblies to move, so that the multiple connecting rod assemblies are disengaged from the extension tube of the active shaft sleeve, and the movable seat is kept at the right extreme position in a natural state by the resetting device.

[0008] Furthermore, the connecting rod assembly includes 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 to the left along the left-right direction. The left end of the push-pull rod is hinged to the first connecting rod, the inner end of the first connecting rod is hinged to the outer end of the second connecting rod, the inner end of the second connecting rod is hinged to the transmission shaft, the outer end of the first connecting rod is hinged to the inner end of the friction block, the shape of the outer end surface of the friction block is consistent with the shape of the inner side wall of the extension tube, and the inner side wall of the extension tube is provided with a mounting groove for mounting the friction block, and the friction block can be mounted When the movable seat moves to the right, the push-pull rod on the movable seat will pull the first connecting rod to the right, so that the first connecting rod and the second connecting rod will move, driving the friction block to contract radially inward and thus disengage from the inner wall of the extension tube, thereby realizing the disengagement of the movable seat from the extension tube.

[0009] Further, the positioning locking device includes a first positioning locking device, the first positioning locking device includes a plurality of first locking units, the plurality of first locking units are evenly distributed along the circumference of the extension tube, and each locking unit includes a first locking groove, a first locking spring and a locking ball;

[0010] A circle of annular limiting grooves are formed on the right end surface of the extension tube, and a circle of annular limiting blocks are provided on the left end of the movable seat. The annular limiting blocks extend into the annular limiting grooves and can move left and right in the annular limiting grooves. The left end surface of the annular limiting blocks cooperates with the bottom wall of the annular limiting grooves to limit the left limit position of the movable seat.

[0011] A plurality of first locking grooves are evenly distributed along the circumferential direction on the inner side wall of the annular limit groove of the extension tube, and the axis of the first locking groove extends along the radial direction of the extension tube. A first locking spring and a locking ball arranged inside and outside are provided in each first locking groove, and the locking ball is elastically pressed against the inner side wall of the annular limit block by the first locking spring. A locking groove cooperating with the locking ball is provided on the inner side wall of the annular limit block. When the movable seat is located at the left limit position, the locking ball is just embedded in the locking groove of the annular limit block to achieve locking.

[0012] Furthermore, the positioning locking device also includes a second positioning locking device, which includes a plurality of second locking units, and the plurality of second locking units are evenly distributed along the circumference of the transmission shaft, and each second locking unit includes a locking arm, a second locking spring, and a spring guide pin. The left end face of the movable seat located inside the annular limit block is a truncated cone-shaped locking conical surface, the locking arm is located on the left side of the locking conical surface of the movable seat, and 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 a spring guide pin extending toward the transmission shaft, and the second locking spring is sleeved on the spring guide pin. Under the elastic force of the second locking spring, the right end of the locking arm is always pressed against the locking conical surface of the movable seat, and the inner side of the left end of the locking arm is provided with an inwardly protruding claw, and the transmission shaft is provided with a clamping groove matching the clamping claw. When the movable seat is located at the left extreme position, the clamping claw of the locking arm is just embedded in the clamping groove on the transmission shaft, thereby limiting the movable seat from continuing to move to the left.

[0013] Furthermore, a right limiting ring is provided on the transmission shaft, and the right end of the movable seat cooperates with the right limiting ring to limit the right extreme position of the movable seat.

[0014] Furthermore, the reset device includes a reset spring, the outer wall of the movable seat is a cylindrical structure, the reset spring is sleeved on the outer wall of the movable seat, the left end of the reset spring presses against the right end of the extension tube, and the right end of the reset spring presses against the retaining ring at the right end of the movable seat.

[0015] Furthermore, a thrust bearing is provided at the right end of the extension tube at a position corresponding to the return spring.

[0016] Furthermore, the circumferential limiting structure is specifically configured as follows: a spline connection is adopted between the movable seat and the transmission shaft.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0018] 1. An engine synchronizer mechanism provided by the present invention can realize the engagement or disengagement of the connecting rod assembly with the inner side wall of the extension tube of the active shaft sleeve by pushing the movable seat to slide left and right on the transmission shaft, and then realize the rapid engagement or disengagement between the active component and the driven component; at the same time, the present invention adopts a positioning and locking device to position and lock the movable seat in the engaged state, and adopts a reset device to ensure that the movable seat in the disengaged state remains in the position of the disengaged state, thereby improving the stability and reliability of the entire mechanism.

[0019] 2. The present invention provides an engine synchronizer mechanism, wherein the connecting rod assembly 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 a friction block embedded in a mounting groove on the inner side wall of an extension tube. The movable seat is moved left and right to drive the corresponding connecting rod to move, thereby achieving engagement or disengagement of the friction block with the inner side wall of the extension tube. This structural design is simple and ingenious, with a compact layout, light overall weight, and high transmission efficiency.

[0020] 3. An engine synchronizer mechanism provided by the present invention has a positioning locking device which adopts two locking structures. One locking structure is that a locking ball cooperates with a locking groove, and the other locking structure is that a claw of a locking arm cooperates with a slot on a transmission shaft. Double locking can be achieved with good locking effect, which ensures the reliability and safety of the engagement state and can avoid accidents caused by sudden disengagement of the entire mechanism during rotation.

[0021] 4. The present invention provides an engine synchronizer mechanism, in which a spline connection is adopted between a movable seat and a transmission shaft, so that a large torque can be transmitted and power loss such as slipping can be avoided. The mechanism is suitable for devices with many functional accessories and large power requirements, and the transmission accuracy is ensured, the noise is reduced, and the reliability and stability of the mechanism are improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a perspective view of the present invention.

[0023] Figure 2 It is a three-dimensional half-section view of the present invention.

[0024] Figure 3 yes Figure 2 An enlarged view of the second locking unit part.

[0025] Figure 4 It is a longitudinal cross-sectional view of the present invention.

[0026] Figure 5 yes Figure 4 An enlarged view of the first locking unit part.

[0027] Figure 6 yes Figure 4 Middle AA section view.

[0028] Figure 7 yes Figure 4 Middle BB cross-section.

[0029] In the figure, 1 is a transmission shaft; 2 is a movable seat; 3 is a driven wheel; 4 is a driving sleeve; 5 is a driving wheel; 6 is a rolling bearing; 7 is an extension tube; 8 is a spline; 9 is a return spring; 10 is a retaining ring; 11 is a thrust bearing; 12 is a push-pull rod; 13 is a first connecting rod; 14 is a second connecting rod; 15 is a friction block; 16 is a mounting groove; 17 is a first locking groove; 18 is a first locking spring; 19 is a locking ball; 20 is an annular limit groove; 21 is an annular limit block; 22 is a locking arm; 23 is a second locking spring; 24 is a spring guide pin; 25 is a locking cone; 26 is a claw; 27 is a groove; 28 is a right limit ring. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in combination with the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] Please refer to Figures 1 to 7 The present embodiment discloses an engine synchronizer mechanism, including a transmission shaft 1. Assuming that the axial direction of the transmission shaft 1 is the left-right direction, the transmission shaft 1 is sequentially provided with a driving component, a movable seat 2 and a driven component along the axial direction from left to right. In the present embodiment, the driven component is a driven wheel 3, and the driven wheel 3 is fixedly provided on the transmission shaft 1.

[0032] The active component includes an active shaft sleeve 4 and an active wheel 5 which are fixedly mounted inside and outside. One end of the active shaft sleeve 4 is rotatably mounted on the transmission shaft 1 through a rolling bearing 6. The other end of the active shaft sleeve 4 extends to the right to form an extension tube 7. A gap is provided between the inner wall of the extension tube 7 and the main shaft.

[0033] The movable seat 2 is slidably mounted on the transmission shaft 1 and can slide along the axial direction of the transmission shaft 1, and the circumferential rotation of the movable seat 2 relative to the transmission shaft 1 is limited by a circumferential limiting structure. The circumferential limiting structure is specifically configured as follows: the movable seat 2 and the transmission shaft 1 are connected by a spline 8, so that the movable seat 2 can only move axially relative to the transmission shaft 1, but cannot rotate circumferentially.

[0034] The movable seat 2 and the inner wall of the extension tube 7 of the active shaft sleeve 4 are engaged or disengaged through multiple connecting rod assemblies evenly distributed along the circumferential direction. In this embodiment, four connecting rod assemblies are used. When the movable seat 2 moves to the left to the left limit position, the movable seat 2 will drive the multiple connecting rod assemblies to move, so that the multiple connecting rod assemblies are engaged with the extension tube 7 of the active shaft sleeve 4, and the left limit position of the movable seat 2 is positioned and locked by the positioning and locking device; when the movable seat 2 moves to the right to the right limit position, the movable seat 2 drives the multiple connecting rod assemblies to move, so that the multiple connecting rod assemblies are disengaged from the extension tube 7 of the active shaft sleeve 4, and the movable seat 2 is kept in the right limit position in a natural state by the reset device, and the reset device includes a reset spring 9, the outer wall of the movable seat 2 is a cylindrical structure, the reset spring 9 is sleeved on the outer wall of the movable seat 2, the left end of the reset spring 9 presses on the right end of the extension tube 7, and the right end of the reset spring 9 presses on the retaining ring 10 at the right end of the movable seat 2. The right end of the extension tube 7 is provided with a thrust bearing 11 at a position corresponding to the reset spring 9 , and the thrust bearing 11 is arranged to bear the axial elastic force of the reset spring 9 and prevent the reset spring 9 from rotating along with the rotation of the active sleeve 4 .

[0035] Specifically, the connecting rod assembly includes 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 to the left along the left-right direction. The left end of the push-pull rod 12 is hinged to the first connecting rod 13, the inner end of the first connecting rod 13 is hinged to the outer end of the second connecting rod 14, the inner end of the second connecting rod 14 is hinged to the transmission shaft 1, the outer end of the first connecting rod 13 is hinged to the inner end of the friction block 15, the outer end surface shape of the friction block 15 is consistent with the shape of the inner side wall of the extension tube 7, and the inner side wall of the extension tube 7 is provided with a mounting groove 16 for mounting the friction block 15, and the friction block 15 can be installed in the The first connecting rod 13 is radially movable in the groove 16; when the movable seat 2 moves to the left, the push-pull rod 12 on the movable seat 2 will push the first connecting rod 13 to the left, so that the first connecting rod 13 and the second connecting rod 14 are actuated, driving the friction block 15 to expand radially outward so as to fit with the inner wall of the extension tube 7, thereby realizing the engagement of the movable seat 2 with the extension tube 7; when the movable seat 2 moves to the right, the push-pull rod 12 on the movable seat 2 will pull the first connecting rod 13 to the right, so that the first connecting rod 13 and the second connecting rod 14 are actuated, driving the friction block 15 to shrink radially inward so as to disengage from the inner wall of the extension tube 7, thereby realizing the disengagement of the movable seat 2 with the extension tube 7.

[0036] Specifically, the positioning and locking device includes a first positioning and locking device and a second positioning and locking device.

[0037] The first positioning and locking device includes a plurality of first locking units, and four first locking units are used in this embodiment. The four first locking units are evenly distributed along the circumference of the extension tube 7, and each locking unit includes a first locking groove 17, a first locking spring 18 and a locking ball 19; a circle of annular limiting grooves 20 are formed on the right end face of the extension tube 7, and a circle of annular limiting blocks 21 are provided on the left end of the movable seat 2. The annular limiting blocks 21 extend into the annular limiting grooves 20 and can move left and right in the annular limiting grooves 20. The left end face of the annular limiting blocks 21 cooperates with the bottom wall of the annular limiting grooves 20 to limit the left extreme position of the movable seat 2; the annular limiting grooves 20 of the extension tube 7 are provided on the left end face of the annular limiting blocks 21. A plurality of first locking grooves 17 are uniformly distributed along the circumferential direction on the inner wall, and the axis of the first locking groove 17 extends along the radial direction of the extension tube 7. A first locking spring 18 and a locking ball 19 arranged inside and outside are provided in each first locking groove 17. The locking ball 19 is elastically pressed against the inner wall of the annular limit block 21 by the first locking spring 18. A locking groove cooperating with the locking ball 19 is provided on the inner wall of the annular limit block 21. When the movable seat 2 is located at the left limit position, the locking ball 19 is just embedded in the locking groove of the annular limit block 21 to achieve locking.

[0038] The second positioning and locking device includes a plurality of second locking units, and four second locking units are used in this embodiment. The four second locking units are evenly distributed along the circumference of the transmission shaft 1, and each second locking unit includes a locking arm 22, a second locking spring 23, and a spring guide pin 24. The left end surface of the movable seat 2 located inside the annular limit block 21 is a truncated cone-shaped locking conical surface 25. The locking arm 22 is located 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 inner side of the left section of the locking arm 22 is provided with a spring guide pin 24 extending toward the transmission shaft 1. The second locking The spring 23 is sleeved on the spring guide pin 24. Under the elastic force of the second locking spring 23, the right end of the locking arm 22 is always pressed against the locking cone 25 of the movable seat 2. The inner side of the left end of the locking arm 22 is provided with an inwardly protruding claw 26, and the transmission shaft 1 is provided with a groove 27 matching the claw 26. When the movable seat 2 is located at the left extreme position, the claw 26 of the locking arm 22 is just embedded in the groove 27 on the transmission shaft 1, thereby limiting the movable seat 2 from continuing to move to the left.

[0039] A right limiting ring 28 is provided on the transmission shaft 1 , and the right end of the movable seat 2 cooperates with the right limiting ring 28 to limit the right limit position of the movable seat 2 .

[0040] When working, the synchronizer mechanism is installed in the gear chamber of the cylinder body, the driving sleeve 4 is rotatably installed in the cylinder body through the bearing, the driving wheel 5 is connected to the driving source, and the driven wheel 3 is meshed with the transmission gear. The mechanism realizes the rapid engagement or disengagement of the power between the driving source and the transmission gear. The specific process is as follows:

[0041] When the movable seat 2 is pushed to the left, the push-pull rod 12 at the left end of the movable seat 2 will push the first connecting rod 13 to the left, so that the first connecting rod 13 and the second connecting rod 14 can move, driving the friction block 15 to expand radially outward so as to fit with the inner wall of the extension tube 7, thereby realizing the engagement of the movable seat 2 with the extension tube 7; at this time, the claws 26 of each locking arm 22 are just embedded in the grooves 27 on the transmission shaft 1, limiting the movable seat 2 from continuing to move to the left; at the same time, each locking ball 19 is just embedded in each locking groove of the annular limit block 21, limiting the left and right movement of the annular limit block 21; through the two positioning and locking devices, the movable seat 2 is double locked at the left extreme position to prevent the active component and the driven component from accidentally disengaging.

[0042] Pull the movable seat 2 to the right. When the combined force of the pulling force and the elastic force of the return spring 9 is large enough to overcome the blocking force of the locking ball 19 on the annular limit block 21, the annular limit block 21 moves to the right, the locking ball 19 is pressed into the first locking groove 17, and the movable seat 2 moves to the right. The push-pull rod 12 on the movable seat 2 will pull the first connecting rod 13 to the right, so that the first connecting rod 13 and the second connecting rod 14 move, driving the friction block 15 to contract radially inward and thus disengage from the inner wall of the extension tube 7, so as to achieve the separation of the movable seat 2 from the extension tube 7. When the movable seat 2 moves to the right limit position, it stops moving. At this time, under the action of the return spring 9, the movable seat 2 remains in this position. During the whole process, the right end of the locking arm 22 is always elastically pressed against the locking cone 25 of the movable seat 2.

[0043] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An engine synchronizer mechanism, comprising a transmission shaft (1), wherein the axial direction of the transmission shaft (1) is a left-right direction, and is characterized in that: The transmission shaft (1) is provided with a driving component, a movable seat (2) and a driven component in sequence from left to right along the axial direction, and the driven component is fixedly mounted on the transmission shaft (1); The active component comprises an active shaft sleeve (4) and an active wheel (5) which are fixedly mounted inside and outside, one end of the active shaft sleeve (4) is rotatably mounted on the transmission shaft (1), and the other end of the active shaft sleeve (4) extends rightward to form an extension tube (7), and a gap is provided between the inner side wall of the extension tube (7) and the main shaft; The movable seat (2) is slidably mounted on the transmission shaft (1) and can slide along the axial direction of the transmission shaft (1), and the circumferential rotation of the movable seat (2) relative to the transmission shaft (1) is limited by a circumferential limiting structure. The movable seat (2) and the inner wall of the extension tube (7) of the active shaft sleeve (4) are engaged or disengaged by a plurality of connecting rod assemblies evenly distributed along the circumference. When the movable seat (2) moves to the left to the left limit position, the movable seat (2) drives the plurality of connecting rod assemblies to move, so that the plurality of connecting rod assemblies are engaged with the extension tube (7) of the active shaft sleeve (4), and the left limit position of the movable seat (2) is positioned and locked by a positioning and locking device; when the movable seat (2) moves to the right to the right limit position, the movable seat (2) drives the plurality of connecting rod assemblies to move, so that the plurality of connecting rod assemblies are disengaged from the extension tube (7) of the active shaft sleeve (4), and the movable seat (2) is kept at the right limit position in a natural state by a reset device. 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 to the left along the left-right direction. The left end of the push-pull rod (12) is hinged to the first connecting rod (13). The inner end of the first connecting rod (13) is hinged to the outer end of the second connecting rod (14). The inner end of the second connecting rod (14) is hinged to the transmission shaft (1). The outer end of the first connecting rod (13) is hinged to the inner end of the friction block (15). The shape of the outer end surface of the friction block (15) is consistent with the shape of the inner side wall of the extension tube (7). The inner side wall of the extension tube (7) is provided with a mounting groove (16) for mounting the friction block (15). The friction block (15) can be mounted in the mounting groove (16). 16) moves radially along the inner side of the movable seat (2); when the movable seat (2) moves to the left, the push-pull rod (12) on the movable seat (2) will push the first connecting rod (13) to the left, so that the first connecting rod (13) and the second connecting rod (14) move, driving the friction block (15) to expand radially outward so as to fit with the inner side wall of the extension tube (7), thereby realizing the engagement of the movable seat (2) and the extension tube (7); when the movable seat (2) moves to the right, the push-pull rod (12) on the movable seat (2) will pull the first connecting rod (13) to the right, so that the first connecting rod (13) and the second connecting rod (14) move, driving the friction block (15) to contract radially inward so as to disengage from the inner side wall of the extension tube (7), thereby realizing the disengagement of the movable seat (2) and the extension tube (7).

2. An engine synchronizer mechanism as claimed in claim 1, characterized in that: The positioning locking device comprises a first positioning locking device, the first positioning locking device comprises a plurality of first locking units, the plurality of first locking units are evenly distributed along the circumference of the extension tube (7), each locking unit comprises a first locking groove (17), a first locking spring (18) and a locking ball (19); The right end surface of the extension tube (7) is provided with a circle of annular limiting grooves (20), and the left end of the movable seat (2) is provided with a circle of annular limiting blocks (21). The annular limiting blocks (21) extend into the annular limiting grooves (20) and can move left and right in the annular limiting grooves (20). The left end surface of the annular limiting blocks (21) cooperates with the bottom wall of the annular limiting grooves (20) to limit the left limit position of the movable seat (2); A plurality of first locking grooves (17) are evenly distributed along the circumferential direction on the inner wall of the annular limiting groove (20) of the extension tube (7), and the axis of the first locking groove (17) extends along the radial direction of the extension tube (7). Each first locking groove (17) is provided with a first locking spring (18) and a locking ball (19) arranged inside and outside. The locking ball (19) is elastically pressed against the inner wall of the annular limiting block (21) by the first locking spring (18). A locking groove cooperating with the locking ball (19) is provided on the inner wall of the annular limiting block (21). When the movable seat (2) is located at the left limit position, the locking ball (19) is just embedded in the locking groove of the annular limiting block (21) to achieve locking.

3. An engine synchronizer mechanism as claimed in claim 2, characterized in that: The positioning locking device also includes a second positioning locking device, the second positioning locking device includes a plurality of second locking units, the plurality of second locking units are evenly distributed along the circumference of the transmission shaft (1), each second locking unit includes a locking arm (22), a second locking spring (23), and a spring guide pin (24), the left end surface of the movable seat (2) located inside the annular limit block (21) is a truncated cone-shaped locking conical surface (25), the locking arm (22) is located 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), and the inner side of the left section of the locking arm (22) is provided with a locking member facing the transmission shaft (1). A spring guide pin (24) extends in the left direction, and a second locking spring (23) is sleeved on the spring guide pin (24). Under the elastic force of the second locking spring (23), the right end of the locking arm (22) is always pressed against the locking cone surface (25) of the movable seat (2). A claw (26) protruding inward is provided on the inner side of the left end of the locking arm (22). A groove (27) matching with the claw (26) is provided on the transmission shaft (1). When the movable seat (2) is located at the left limit position, the claw (26) of the locking arm (22) is just embedded in the groove (27) on the transmission shaft (1), thereby limiting the movable seat (2) from continuing to move leftward.

4. An engine synchronizer mechanism as claimed in claim 1, characterized in that: The transmission shaft (1) is provided with a right limiting ring (28), and the right end of the movable seat (2) cooperates with the right limiting ring (28) to limit the right limit position of the movable seat (2).

5. An engine synchronizer mechanism as claimed in claim 1, characterized in that: The reset device comprises a reset spring (9), the outer wall of the movable seat (2) is a cylindrical structure, the reset spring (9) is sleeved on the outer wall of the movable seat (2), the left end of the reset spring (9) presses against the right end of the extension tube (7), and the right end of the reset spring (9) presses against the retaining ring (10) at the right end of the movable seat (2).

6. An engine synchronizer mechanism as claimed in claim 5, characterized in that: A thrust bearing (11) is provided at the right end of the extension tube (7) at a position corresponding to the return spring (9).

7. An engine synchronizer mechanism as claimed in claim 1, characterized in that: The circumferential limiting structure is specifically configured as follows: a spline (8) is used to connect the movable seat (2) and the transmission shaft (1).

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