Automatic connecting structure and method for push chain

Abstract

The invention belongs to the technical field of mechanical connecting pieces, and particularly relates to an automatic connecting structure and method for a push chain, the automatic connecting structure comprises a male head end and a female head end, and the female head end comprises an ejector block, a locking hole and a telescopic positioning tongue; the male head end comprises a piston seat, a piston rod, a movable floating block and a circular-truncated-cone-shaped guide block. The method comprises a push-only non-pull mode, a pull-only non-push mode and a male end and female end unlocking mode. According to the invention, by controlling the extension distance of the pushing chain, the locking position of the automatic connection structure can be determined, the automatic connection and disconnection functions of the pushing chain and the moved object can be realized, and further, by controlling the locking position, the transmission functions of only pushing without pulling and only pulling without pushing can be realized.

Description

Technical Field

[0001] The invention belongs to the technical field of mechanical connectors, and in particular relates to an automatic connection structure and method for a push chain. Background Art

[0002] In recent years, as push chains are increasingly used in logistics, three-dimensional warehousing, military, medical and other fields, research has shown that push chains currently have two types of connections: rigid connection and manual connection, and neither can achieve automatic connection, that is, it is impossible to achieve the functions required by customers such as only pushing but not pulling, only pulling but not pushing. However, with the development of automation trends, more and more automatic connection needs have become inevitable, especially in the field of horizontal transmission. The traditional solution is to use electric or pneumatic control (such as electric clamping, vacuum suction cups, etc.), but the use of electrical or pneumatic devices will greatly increase the complexity of the solution, resulting in relatively high costs, and the need to connect air pipes or cables, and additional motors, cylinders, sensors and other components.

[0003] If a purely mechanical automatic connection solution can be used to achieve automatic connection and disconnection between the push chain and the moved object in any scenario, it can not only reduce production costs but also greatly increase the reliability of the device, and its application will be of great significance. Summary of the invention

[0004] The present invention discloses an automatic connection structure and method for a push chain. By controlling the extension distance of the push chain, the locking position of the automatic connection structure can be determined, thereby realizing the automatic connection and disconnection functions of the push chain and the moved object. Furthermore, by controlling the locking position, the transmission functions of only pushing without pulling and only pulling without pushing can be realized.

[0005] To achieve the above object, the technical solution of the present invention is:

[0006] An automatic connection structure for a push chain comprises a push chain, a moved object and an automatic connection structure for connecting the push chain and the moved object, the automatic connection structure comprising a male end and a female end, the outer ends of the male end and the female end are respectively connected to the end of the push chain or the moved object, the inner ends of the male end and the female end are plug-in connected, the male end is provided with a piston rod, the piston rod is provided with a movable float, the female end is provided with a locking hole, the inner wall of the locking hole is provided with a telescopic positioning tongue, the piston rod, the movable float, the locking hole and the telescopic positioning tongue are used in combination, and only pushing without pulling, only pulling without pushing, automatic connection and automatic disconnection are achieved by controlling the insertion depth of the male end and the female end.

[0007] Preferably, the male end includes a piston seat, one end of the piston seat is fixedly connected to the moved object, the piston seat is coaxially provided with a stepped hole passing through the left and right end faces, the large diameter hole section of the stepped hole is located on the side facing the moved object, the small diameter hole section is provided with an internal thread, one end of the piston rod is threadedly connected to the small diameter hole section, and a movable floating block is sleeved on the piston rod.

[0008] Preferably, the piston rod is a stepped shaft structure, the small diameter shaft section of the stepped shaft structure is threadedly connected to the small diameter hole section, the large diameter shaft section is coaxially sleeved with a movable floating block, the end of the large diameter shaft section is integrally formed with a truncated cone guide block, and the inclined curved surface of the side wall of the truncated cone guide block constitutes a matching structure used in conjunction with the telescopic positioning tongue.

[0009] Preferably, the piston rod is coaxially provided with a through hole passing through the left and right end faces, and a guide groove arranged along the axial direction is symmetrically opened on the outer wall of the large diameter shaft end, and a first pin passes through the two guide grooves. The movable floating block includes an integrally formed sleeve and a guide head, and the sleeve is slidably sleeved on the large diameter shaft section. The two ends of the first pin respectively pass through the preset mounting holes on the sleeve and are fixedly connected to the mounting holes. The guide head is coaxially arranged at one end of the sleeve facing the truncated cone guide block. The cross-section of the guide head is triangular, including an inclined surface one facing one end of the truncated cone guide block and an inclined surface two away from one end of the truncated cone guide block. The inclined surface one constitutes a matching structure two that cooperates with the telescopic positioning tongue, and the inclined surface two constitutes a matching structure three that cooperates with the telescopic positioning tongue.

[0010] Preferably, a conical groove is coaxially opened at one end of the truncated cone guide block toward the guide head, and the conical groove matches the shape and size of the matching structure 2. When the matching structure 2 completely enters the conical groove, the inclined surface 1 fits tightly against the inner wall of the conical groove.

[0011] Preferably, a second pin is provided on the large diameter hole section along the diameter direction, the axes of the second pin and the first pin intersect with the axis of the stepped hole, and a tension spring is connected between the first pin and the second pin.

[0012] Preferably, the female end includes a top block, one end of which is fixedly connected to the end of the push chain, and the other end is axially provided with a locking hole extending inward, and the outer wall of the female end is integrally connected with a protrusion at one end away from the push chain, and the protrusion is symmetrically provided with two guide holes, and each guide hole is provided with a telescopic positioning tongue.

[0013] Preferably, the telescopic positioning tongue comprises a latch, a limit block, and a lock tongue, the upper end hole wall of the guide hole is provided with a sliding hole, the latch is axially arranged in the guide hole, the upper end of the latch passes through the sliding hole and is slidably connected to the sliding hole, the top end of the latch is provided with a limit block, and the bottom end of the latch is provided with a lock tongue, the cross-section of the sliding hole is rectangular, the cross-sectional size of the latch matches the sliding hole, the lock tongue comprises a sliding portion slidably connected to the hole wall of the guide hole, a matching structure four integrally connected to the bottom end of the sliding portion, the matching structure four is provided with a first guide inclined surface on the side facing the male end, and a second guide inclined surface is provided at the bottom away from the side of the male end, the bottom ends of the first guide inclined surface and the second guide inclined surface intersect at the same bottom ridge line, the height of the second guide inclined surface is less than the height of the first guide inclined surface, and a vertical surface facing the push chain side is provided above the top of the second guide inclined surface, and the vertical surface constitutes the matching structure five; the outer periphery of the latch is sleeved with a compression spring, and the two ends of the compression spring are respectively connected to the top of the lock tongue and the top wall of the guide hole.

[0014] Preferably, when the piston rod completely enters the locking hole and the end of the piston rod abuts against the bottom of the locking hole, the movable floating block is located on the side of the locking hole away from the piston seat with respect to the telescopic positioning tongue and a gap is left between the second inclined surface and the locking tongue; the opening end of the locking hole is provided with a chamfered structure, and the end of the piston seat away from the moved object is provided with a chamfered structure, the push chain is driven by a drive motor, and the outer diameters of the guide head and the truncated cone guide block match the inner diameter of the locking hole and slide together.

[0015] A method for using an automatic connection structure for a push chain includes the following modes:

[0016] Mode 1, push only, no pull: the driving motor drives the female end to move toward the male end, so that the piston rod is inserted into the locking hole. During this process, the matching structure 1 cooperates with the first guide slope to retract the lock tongue into the guide hole, and then the truncated cone guide block passes over the telescopic positioning tongue. Further, the inclined surface 1 cooperates with the first guide slope to retract the lock tongue into the guide hole, and the guide head passes over the telescopic positioning tongue. Further, the end of the piston rod abuts against the bottom of the locking hole, and the object to be moved is pushed to the specified position by the push chain.

[0017] Mode 2: Only pull without pushing: The driving motor drives the female end to move toward the male end, so that the piston rod is inserted into the locking hole. During this process, the matching structure 1 cooperates with the first guide slope to retract the lock tongue into the guide hole, so that the truncated cone guide block passes over the telescopic positioning tongue. Then, the driving motor pulls the push chain to pull the object to be moved to the specified position.

[0018] Mode three, unlocking the male end and the female end: the push chain pushes the female end to move toward the male end. When the guide head passes over the telescopic positioning tongue, the push chain pulls the female end, and the second inclined surface cooperates with the second guide inclined surface to retract the positioning tongue into the guide hole, thereby separating the male end and the female end.

[0019] The beneficial effects of the automatic connection structure and method for a push chain of the present invention are as follows:

[0020] (1) The present invention realizes the mechanical automatic connection and disconnection between the push chain and the object to be moved through an automatic connection structure and a push chain distance control method, without relying on other pneumatic or electric structures and controls;

[0021] (2) The present invention adopts a mechanical automatic connection and disconnection solution, which can greatly increase its connection reliability and reduce production costs;

[0022] (3) The present invention solves the problem that the push chain and the connected object cannot be connected mechanically and automatically, greatly expanding its scope of automated application;

[0023] (4) The push chain control method of the present invention directly uses a drive motor, and the control system is simpler and does not require other control schemes;

[0024] (5) The automatic connection structure of the present invention is compact and occupies little space, and there is no risk of interference on the path of picking up and delivering moving objects. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 : A three-dimensional structural diagram of the present invention when not connected.

[0026] Figure 2 : A schematic diagram of the cross-sectional structure of the present invention when not connected.

[0027] Figure 3 : A schematic cross-sectional view of the truncated cone-shaped guide block of the present invention when it passes over the lock tongue.

[0028] Figure 4 : A schematic diagram of the structure in which the back side of the truncated cone guide block of the present invention cooperates with the vertical surface.

[0029] Figure 5 : A schematic cross-sectional view of the guide head of the present invention after it passes over the lock tongue.

[0030] Figure 6 : A schematic cross-sectional view of the structure in which the end of the piston rod of the present invention abuts against the bottom of the locking hole.

[0031] Figure 7 : A schematic cross-sectional view of the cooperation between the guide head and the tapered groove during the unlocking process of the male end and the female end of the present invention.

[0032] Figure 8 : Schematic diagram of the three-dimensional structure of the top block of the present invention.

[0033] Fig. 9 : Schematic diagram of the matching structure of the piston rod and the piston seat of the present invention.

[0034] Fig.10 : A schematic structural diagram of a movable floating block of the present invention.

[0035] 01. Push chain; 02. Female end; 03. Male end; 04. Moved object; 05. Locking hole; 06. Raised portion; 07. Sliding hole; 1. Top block; 2. Latch; 3. Limit block; 4. Compression spring; 5. Piston rod; 51. Cone-shaped guide block; 52. Conical groove; 53. Matching structure one; 54. Through hole; 55. Guide groove; 6. Movable floating block; 61. Sleeve; 62. Guide head; 63. Inclined surface one; 64. Inclined surface two; 65. Inner hole of floating block; 66. Mounting hole; 7. Tension spring; 8. First pin; 9. Second pin; 10. Piston seat; 11. Lock tongue; 111. First guide inclined surface; 112. Second guide inclined surface; 113. Vertical surface; 114. Sliding portion. DETAILED DESCRIPTION

[0036] The following description is only a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

[0037] The following embodiments may be understood as individually expressing a part of a local structure or method of the present invention, or may be understood as a combination of the embodiments to explain the connotation of a larger structure or method of the present invention.

[0038] Example 1

[0039] An automatic connection structure for push chains, such as Figure 1 As shown, it includes a push chain 01, a moved object 04 and an automatic connection structure for connecting the push chain 01 and the moved object 04. The automatic connection structure includes a male end 03 and a female end 02. The outer ends of the male end 03 and the female end 02 are respectively connected to the end of the push chain 01 or the moved object 04. That is to say, the positions of the male end 03 and the female end 02 are interchangeable. The male end can also be connected to the push chain, and the female end can also be connected to the moved object. Figure 1 Only one installation form is given; Figure 2-Figure 10As shown, the inner ends of the male end 03 and the female end 02 are plug-in connected, the male end 03 is provided with a piston rod 5, the piston rod 5 is provided with a movable float 6, the female end 02 is provided with a locking hole 05, the inner wall of the locking hole 05 is provided with a telescopic positioning tongue, the piston rod 5, the movable float 6, the locking hole 05, and the telescopic positioning tongue are used in combination, and the control of the insertion depth of the male end 03 and the female end 02 realizes only pushing without pulling, only pulling without pushing, automatic connection and automatic disconnection.

[0040] Example 2

[0041] like Figure 2-Figure 10 As shown, the male end 03 includes a piston seat 10, one end of which is fixedly connected to the moved object 04, and the piston seat 10 is coaxially provided with a stepped hole that passes through the left and right end faces, the large-diameter hole section of the stepped hole is located on the side facing the moved object 04, and the small-diameter hole section is provided with an internal thread, one end of the piston rod 5 is threadedly connected to the small-diameter hole section, and a movable floating block 6 is sleeved on the piston rod 5.

[0042] Example 3

[0043] like Figure 2-Figure 10 As shown, the piston rod 5 is a stepped shaft structure, the small diameter shaft section of the stepped shaft structure is threadedly connected to the small diameter hole section, the large diameter shaft section is coaxially sleeved with a movable floating block 6, and the end of the large diameter shaft section is integrally formed with a truncated cone guide block 51, and the inclined curved surface of the side wall of the truncated cone guide block 51 constitutes a matching structure 53 used in conjunction with the telescopic positioning tongue.

[0044] like Figure 2-Figure 10 As shown, the piston rod 5 is coaxially provided with a through hole 54 passing through the left and right end faces, and a guide groove 55 arranged along the axial direction is symmetrically opened on the outer wall of the large-diameter shaft end, and the first pin 8 is penetrated in the two guide grooves 55. The movable floating block 6 includes an integrally formed sleeve 61 and a guide head 62. The sleeve 61 is slidably sleeved on the large-diameter shaft section, and the two ends of the first pin 8 respectively pass through the preset mounting holes 66 on the sleeve 61 and are fixedly connected with the mounting holes 66. The guide head 62 is coaxially arranged at one end of the sleeve 61 facing the truncated cone guide block 51. The cross-section of the guide head 62 is triangular, including an inclined surface 1 63 facing one end of the truncated cone guide block 61 and an inclined surface 2 64 away from one end of the truncated cone guide block 51. The inclined surface 1 63 constitutes a matching structure 2 that cooperates with the telescopic positioning tongue, and the inclined surface 2 64 constitutes a matching structure 3 that cooperates with the telescopic positioning tongue.

[0045] like Figure 2-Figure 10As shown, the truncated cone-shaped guide block 51 is coaxially provided with a conical groove 52 at one end facing the guide head 61. The conical groove 52 matches the shape and size of the matching structure 2. When the matching structure 2 completely enters the conical groove, the inclined surface 1 63 is tightly fitted with the inner wall of the conical groove 52 (as shown in FIG. Figure 7 shown).

[0046] like Figure 2-Figure 10 As shown, a second pin 9 is provided on the large diameter hole section along the diameter direction, the axes of the second pin 9 and the first pin 8 intersect with the axis of the stepped hole, and a tension spring 7 is connected between the first pin 8 and the second pin 9.

[0047] Example 4

[0048] like Figure 1-Figure 10 As shown, the female end 02 includes a top block 1, one end of the top block 1 is fixedly connected to the end of the push chain 01, and the other end is axially provided with a locking hole 05 extending inward, and the outer wall of the female end 02 is integrally connected with a protrusion 06 at one end away from the push chain 01, and the protrusion 06 is symmetrically provided with two guide holes, and each guide hole is provided with a telescopic positioning tongue.

[0049] like Figure 1-Figure 10 As shown, the telescopic positioning tongue includes a latch 2, a limit block 3, and a lock tongue 11. The upper end hole wall of the guide hole is provided with a sliding hole. The latch 2 is axially arranged in the guide hole. The upper end of the latch 2 passes through the sliding hole and is slidably connected to the sliding hole. The top end of the latch 2 is provided with a limit block 3, and the bottom end of the latch 2 is provided with a lock tongue 11. The cross-section of the sliding hole is rectangular to limit the rotation of the latch. The cross-sectional size of the latch 2 matches the sliding hole. The lock tongue 11 includes a sliding portion 114 slidably connected to the wall of the guide hole, and a matching structure four is integrally connected to the bottom end of the sliding portion 114. The matching structure four is directed to A first guide slope 111 is provided on the side facing the male end 03, and a second guide slope 112 is provided on the bottom away from the male end 03. The bottom ends of the first guide slope 111 and the second guide slope 112 intersect at the same bottom ridge line. The height of the second guide slope 112 is less than the height of the first guide slope 111. A vertical surface 113 facing the push chain 01 is provided above the top of the second guide slope 112. The vertical surface 113 constitutes a matching structure five. A compression spring 4 is provided on the outer periphery of the latch pin 2. The two ends of the compression spring 4 are respectively connected to the top of the lock tongue 11 and the top wall of the guide hole.

[0050] Example 5

[0051] like Figure 1-Figure 10As shown, when the piston rod 5 completely enters the locking hole 05 and the end of the piston rod 5 abuts against the bottom of the locking hole 05, the movable floating block 6 is located on the side of the locking hole 05 away from the piston seat 10 with respect to the telescopic positioning tongue and a gap is left between the inclined surface 64 and the locking tongue 11, as shown in FIG. Figure 6 as shown; Figure 8 As shown, the opening end of the locking hole 05 is provided with a rounded structure, such as Figure 1-7 As shown, the end of the piston seat 10 away from the moved object 04 is provided with a chamfered structure to facilitate partial entry into the locking hole. The push chain 01 is driven by a driving motor. The outer diameters of the guide head 62 and the truncated cone-shaped guide block 51 match and slide with the inner diameter of the locking hole 05. Figure 7 As shown, when the truncated cone-shaped guide block and the guide head are tightly fitted, their outer circumferences are coplanar and tightly connected, and they can smoothly pass over the lock tongue to unlock the male end and the female end. It should be noted that the push chain mentioned in the present invention is a prior art, and a meshing push chain system disclosed in document CN220131061U can be selected.

[0052] Example 6

[0053] A method for using an automatic connection structure for a push chain includes the following modes:

[0054] Mode 1, push only without pulling: the driving motor drives the female end to move toward the male end, so that the piston rod 5 is inserted into the locking hole 05. During this process, the matching structure 1 53 cooperates with the first guide slope 111 to retract the lock tongue 11 into the guide hole, and then the truncated cone guide block 51 passes over the telescopic positioning tongue. Further, the inclined surface 1 63 cooperates with the first guide slope 111 to retract the lock tongue 11 into the guide hole, and the guide head 62 passes over the telescopic positioning tongue. Further, the end of the piston rod 5 is against the bottom of the locking hole 05, and the object to be moved 04 is pushed to the specified position by the push chain 01. Figure 6 As shown;

[0055] Mode 2: Only pull without pushing: The driving motor drives the female end 02 to move toward the male end 03, so that the piston rod 5 is inserted into the locking hole. During this process, the matching structure 53 cooperates with the first guide slope 111 to retract the lock tongue into the guide hole, so that the truncated cone guide block 51 passes over the telescopic positioning tongue. Then, the driving motor pulls the push chain 01 to pull the movable object 04 to the specified position, such as Figure 4 As shown;

[0056] Mode 3, unlocking the male end and the female end: the push chain 01 pushes the female end 02 to move toward the male end 03. When the guide head 62 passes over the telescopic positioning tongue, the push chain 01 pulls the female end 02. Since the object being moved is fixed or the friction between the object being moved and the bottom contact surface is greater, the positioning tongue is retracted into the guide hole when the second inclined surface 64 cooperates with the second guide inclined surface 112, thereby separating the male end 03 and the female end 02. Figure 7 shown.

[0057] Working principle of the present invention:

[0058] (1) The driving motor drives the sprocket, which can accurately drive the extension distance of the push chain. At the same time, the push chain has a certain rigidity to ensure linear motion;

[0059] (2) A telescopic positioning tongue is provided at the female end, which can be retracted when passing through the piston rod truncated cone-shaped guide block and the inclined surface at the front end of the guide head of the floating block;

[0060] (3) A movable float is provided at the male end, which can ensure that the initial position is at the right end under the action of the tension spring;

[0061] (4) The locking tongue is provided with a vertical surface, which can be used in conjunction with the back of the truncated cone-shaped guide block to facilitate pulling the object to be moved. The front end of the movable floating block cooperates with the conical groove 52 of the cylindrical guide block. When the two are tightly fitted, the female end is pulled by the push chain to facilitate the separation of the male end and the female end;

[0062] (5) By controlling the relative position of the female end and the male end, the telescopic positioning tongue can be determined to be at the position of the piston rod. When the piston rod moves to the bottom of the locking hole, it can be used to transmit thrust. When the locking tongue is between the cylindrical guide block and the guide head, it can be used to transmit tension.

Claims

1. An automatic connection structure for a push chain, characterized by: It includes a push chain, a moved object and an automatic connection structure for connecting the push chain and the moved object. The automatic connection structure includes a male end and a female end. The outer ends of the male end and the female end are respectively connected to the end of the push chain or the moved object. The inner ends of the male end and the female end are plug-in connected. The male end is provided with a piston rod, and a movable floating block is provided on the piston rod. The female end is provided with a locking hole, and a telescopic positioning tongue is provided on the inner wall of the locking hole. The piston rod, the movable floating block, the locking hole, and the telescopic positioning tongue are used in combination. Pushing without pulling, pulling without pushing, automatic connection and automatic disconnection are realized by controlling the insertion depth of the male end and the female end.

2. An automatic connection structure for a push chain as described in claim 1, characterized in that: the male end includes a piston seat, one end of the piston seat is fixedly connected to the moved object, the piston seat is coaxially provided with a stepped hole passing through the left and right end faces, the large diameter hole section of the stepped hole is located on the side facing the moved object, the small diameter hole section is provided with an internal thread, one end of the piston rod is threadedly connected to the small diameter hole section, and a movable floating block is sleeved on the piston rod.

3. The automatic connection structure for a push chain as claimed in claim 2, characterized in that: The piston rod is a stepped shaft structure, the small diameter shaft section of the stepped shaft structure is threadedly connected to the small diameter hole section, the large diameter shaft section is coaxially sleeved with a movable floating block, the end of the large diameter shaft section is integrally formed with a truncated cone guide block, and the inclined curved surface of the side wall of the truncated cone guide block constitutes a matching structure used in conjunction with the telescopic positioning tongue.

4. An automatic connection structure for a push chain as described in claim 3, characterized in that: the piston rod is coaxially provided with a through hole penetrating the left and right end faces, and a guide groove arranged axially is symmetrically opened on the outer wall of the large diameter shaft end, and a first pin passes through the two guide grooves; the movable floating block includes an integrally formed sleeve and a guide head, the sleeve is slidably sleeved on the large diameter shaft section, the two ends of the first pin respectively pass through the preset mounting holes on the sleeve and are fixedly connected to the mounting holes, the guide head is coaxially arranged at one end of the sleeve facing the truncated cone guide block, the cross-section of the guide head is triangular, including an inclined surface one facing one end of the truncated cone guide block and an inclined surface two away from one end of the truncated cone guide block, the inclined surface one constitutes a matching structure two that cooperates with the telescopic positioning tongue, and the inclined surface two constitutes a matching structure three that cooperates with the telescopic positioning tongue.

5. The automatic connection structure for a push chain as claimed in claim 4, characterized in that: The truncated cone-shaped guide block has a conical groove coaxially formed at one end facing the guide head. The conical groove matches the shape and size of the matching structure 2. When the matching structure 2 completely enters the conical groove, the inclined surface 1 fits tightly against the inner wall of the conical groove.

6. The automatic connection structure for a push chain as claimed in claim 5, characterized in that: A second pin is provided on the large diameter hole section along the diameter direction, the axes of the second pin and the first pin intersect with the axis of the stepped hole, and a tension spring is connected between the first pin and the second pin.

7. The automatic connection structure for a push chain as claimed in claim 6, characterized in that: The female end includes a top block, one end of which is fixedly connected to the end of the push chain, and the other end is axially provided with a locking hole extending inwardly. The outer wall of the female end is integrally connected with a protrusion at one end away from the push chain, and two guide holes are symmetrically opened on the protrusion, and a telescopic positioning tongue is arranged in each guide hole.

8. An automatic connection structure for a push chain as described in claim 7, characterized in that: the telescopic positioning tongue includes a latch, a limit block, and a lock tongue, the upper end hole wall of the guide hole is provided with a sliding hole, the latch is axially arranged in the guide hole, the upper end of the latch passes through the sliding hole and is slidably connected to the sliding hole, the top end of the latch is provided with a limit block, the bottom end of the latch is provided with a lock tongue, the cross-section of the sliding hole is rectangular, the cross-sectional size of the latch matches the sliding hole, the lock tongue includes a sliding part slidably connected to the hole wall of the guide hole, and is integrally connected to the bottom of the sliding part A matching structure four at the end, wherein the matching structure four is provided with a first guiding slope on the side facing the male end, and a second guiding slope is provided at the bottom away from the male end, the bottom ends of the first guiding slope and the second guiding slope intersect at the same bottom ridge line, the height of the second guiding slope is less than the height of the first guiding slope, and a vertical surface facing the push chain side is provided above the top of the second guiding slope, and the vertical surface constitutes a matching structure five; a compression spring is provided on the outer peripheral sleeve of the latch, and the two ends of the compression spring are respectively connected to the top of the lock tongue and the top wall of the guide hole.

9. The automatic connection structure for a push chain as claimed in claim 8, characterized in that: When the piston rod completely enters the locking hole and the end of the piston rod abuts against the bottom of the locking hole, the movable floating block is located on the side of the locking hole away from the piston seat with respect to the telescopic positioning tongue and a gap is left between the second inclined surface and the locking tongue; the opening end of the locking hole is provided with a chamfered structure, and the end of the piston seat away from the moved object is provided with a chamfered structure. The push chain is driven by a driving motor, and the outer diameters of the guide head and the truncated cone guide block match the inner diameter of the locking hole and slide in conjunction.

10. The method for using the automatic connection structure for a push chain according to claim 9, characterized in that it includes the following modes: Mode 1, push only, no pull: the driving motor drives the female end to move toward the male end, so that the piston rod is inserted into the locking hole. During this process, the matching structure 1 cooperates with the first guide slope to retract the lock tongue into the guide hole, and then the truncated cone guide block passes over the telescopic positioning tongue. Further, the inclined surface 1 cooperates with the first guide slope to retract the lock tongue into the guide hole, and the guide head passes over the telescopic positioning tongue. Further, the end of the piston rod abuts against the bottom of the locking hole, and the object to be moved is pushed to the specified position by the push chain. Mode 2: Only pull without pushing: The driving motor drives the female end to move toward the male end, so that the piston rod is inserted into the locking hole. During this process, the matching structure 1 cooperates with the first guide slope to retract the lock tongue into the guide hole, so that the truncated cone guide block passes over the telescopic positioning tongue. Then, the driving motor pulls the push chain to pull the object to be moved to the specified position. Mode three, unlocking the male end and the female end: the push chain pushes the female end to move toward the male end. When the guide head passes over the telescopic positioning tongue, the push chain pulls the female end, and the second inclined surface cooperates with the second guide inclined surface to retract the positioning tongue into the guide hole, thereby separating the male end and the female end.

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