Double-guide-rail length-measuring feeding device

Abstract

The utility model discloses a double guide rail length measuring feeding device which comprises a rail frame, a feeding frame, a feeding mechanism and a length measuring mechanism, the feeding mechanism comprises a feeding clamping arm and a feeding roller frame, the feeding clamping arm is arranged on the rail frame in a sliding mode and provided with at least two clamping tools, and the length measuring mechanism comprises a length measuring positioning arm, a length measuring positioning plate and a length measuring roller frame. The length measuring roller frame and the feeding roller frame are distributed side by side in the left-right direction, the length measuring positioning arm is arranged on the rail frame in a sliding mode and provided with a top plate and a pipe end sensor, and the length measuring positioning plate is fixed to one end of the length measuring roller frame and provided with an in-place detection sensor. The double-pipe positioning and feeding device can realize double-pipe positioning and clamping and can also adapt to clamping and feeding of pipes with different calibers, so that the labor efficiency is improved, the labor intensity is reduced, and the production benefit is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of pipe blanking, and in particular relates to a double-guide rail length measuring and feeding device. Background Art

[0002] At present, the fixed-length feeding mechanism for small-diameter metal pipes is generally suitable for clamping and feeding a single pipe, which has low processing efficiency and is difficult to be applied to the feeding of pipes of different diameters. Utility Model Content

[0003] In order to solve the above problems, the utility model provides a double-guide rail length measuring and feeding device, which can realize double-tube positioning and clamping, and can also adapt to the clamping and feeding of pipes of different diameters, thereby improving labor efficiency, reducing labor intensity, and improving production benefits.

[0004] The embodiments of the present invention are implemented by the following technical solutions:

[0005] A double-guide rail length measuring feeding device comprises a rail frame, a loading frame, a feeding mechanism and a length measuring mechanism, the feeding mechanism comprises a feeding clamping arm and a feeding roller frame, the feeding clamping arm is slidably arranged on the rail frame and is provided with at least two clamping fixtures, the length measuring mechanism comprises a length measuring positioning arm, a length measuring positioning plate and a length measuring roller frame, the length measuring roller frame and the feeding roller frame are arranged side by side on the left and right, the length measuring positioning arm is slidably arranged on the rail frame, and the length measuring positioning arm is provided with a top plate and a pipe end sensor, the length measuring positioning plate is fixed to one end of the length measuring roller frame, and the length measuring positioning plate is provided with an in-place detection sensor.

[0006] In one embodiment of the utility model, the clamping tool includes a base, a clamping cylinder, a V-shaped fixed clamping plate and a movable clamping plate. The base is fixed to the feeding clamping arm, and the V-shaped fixed clamping plate is fixed to the base through a guide column. The clamping cylinder is fixed to the base, and the movable clamping plate is connected to the piston rod of the clamping cylinder, and the movable clamping plate can slide along the guide column.

[0007] In one embodiment of the utility model, the feed roller frame is provided with a plurality of multi-groove rollers, the multi-groove rollers having at least two V-grooves, and the number of the V-grooves is consistent with the number of the clamping fixtures.

[0008] In one embodiment of the utility model, the length measuring roller frame is provided with a plurality of V-groove rollers.

[0009] In one embodiment of the utility model, the length measuring roller frame is provided with a length measuring flap, the feeding roller frame is provided with a feeding flap, a transition plate is provided between the feeding roller frame and the length measuring roller frame, the heights of the length measuring flap and the feeding flap are both higher than the transition plate, the length measuring flap is provided with a three-level sawtooth groove, the high point of the first-level length measuring sawtooth groove of the length measuring flap is located on the loading frame, the low point of the first-level length measuring sawtooth groove is located on the A surface of the V-groove roller, the high point of the second-level length measuring sawtooth groove is located on the A surface of the V-groove roller, the low point of the second-level length measuring sawtooth groove is located on the inclined surface section of the first-level transition sawtooth groove of the transition plate, and the length measuring three-level sawtooth groove is provided on the feeding frame, the low point of the first-level length measuring sawtooth groove is located on the A surface of the V-groove roller, and the low point of the second-level length measuring sawtooth groove is located on the inclined surface section of the first-level transition sawtooth groove of the transition plate. The high point of the first-stage sawtooth groove is located at the inclined section of the first-stage transition sawtooth groove of the transition plate, the low point of the third-stage sawtooth groove is located at the inclined section of the second-stage transition sawtooth groove of the transition plate, the high point of the first-stage feeding sawtooth groove of the feeding flap is located at the inclined section of the second-stage transition sawtooth groove of the transition plate, the low point of the first-stage feeding sawtooth groove of the feeding flap is located at the B surface of the first V-groove of the multi-groove type roller, the high point of the second-stage feeding sawtooth groove of the feeding flap is located at the B surface of the first V-groove of the multi-groove type roller, and the low point of the second-stage feeding sawtooth groove of the feeding flap is located at the C surface of the second V-groove of the multi-groove type roller.

[0010] In one embodiment of the utility model, the feed roller frame is also provided with a feed flap cylinder, a feed horizontal push rod and a feed connecting rod. The feed connecting rod is L-shaped, and the feed connecting rod is hinged to the feed frame body at the bending corner. One end of the feed connecting rod is fixed to the feed flap, and the other end of the feed connecting rod is connected to the feed horizontal push rod. The piston rod of the feed flap cylinder is connected to the feed horizontal push rod, and the feed flap cylinder is hinged to the feed frame body.

[0011] In one embodiment of the utility model, the length measuring roller frame is also provided with a length measuring flap cylinder, a length measuring horizontal push rod and a length measuring connecting rod. The length measuring connecting rod is L-shaped, and the bending corner of the length measuring connecting rod is hinged to the length measuring frame body. One end of the length measuring connecting rod is fixed to the length measuring flap, and the other end of the length measuring connecting rod is connected to the length measuring horizontal push rod. The piston rod of the length measuring flap cylinder is connected to the length measuring horizontal push rod, and the length measuring flap cylinder is hinged to the length measuring frame body.

[0012] The technical solution of the utility model has at least the following advantages and beneficial effects:

[0013] The utility model adopts at least two clamping tools to realize double-tube positioning clamping. Each clamping tool can clamp pipes of different calibers, so that the device as a whole can adapt to the clamping and feeding of pipes of different calibers, thereby improving labor efficiency, reducing labor intensity and improving production benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1 It is a schematic diagram of the double-guide rail length measuring and feeding device in the utility model;

[0016] Figure 2 for Figure 1 A top view of

[0017] Figure 3 It is a schematic diagram of the feeding clamping arm and the length measuring and positioning arm in the utility model;

[0018] Figure 4 It is a schematic diagram of the clamping tooling of the feeding clamping arm in the utility model;

[0019] Figure 5 It is a schematic diagram of the positions of the feeding flap, the transition plate and the length measuring flap in the utility model;

[0020] Figure 6 It is a schematic diagram of the positions of the feeding flap and the transition plate in the utility model;

[0021] Figure 7 It is a schematic diagram of the positions of the length measuring flap and the transition plate in the utility model;

[0022] Figure 8 This is a front view of the length measuring positioning plate and the positioning frame in the utility model;

[0023] Fig. 9 for Figure 8 Side view of.

[0024] Icons: 1-rail frame, 2-feeding clamping arm, 21-base, 22-clamping cylinder, 23-V-shaped fixed clamping plate, 24-moving clamping plate, 32-multi-groove roller, 41-feeding flap, 42-feeding flap cylinder, 43-feeding horizontal push rod, 44-feeding connecting rod, 5-length measuring positioning arm, 51-top plate, 52-travel switch, 53-first laser sensor, 6-length measuring positioning plate, 72-length measuring flap, 73-length measuring flap cylinder, 74-length measuring horizontal push rod, 75-length measuring connecting rod, 76-V-groove roller, 8-transition plate, 91-sawing machine, 92-loading rack. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0026] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. 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.

[0027] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0028] In the description of the present utility model, it should be noted that if the terms "inside", "outside", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the utility model product is usually placed when used. It is only for the convenience of describing the present utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present utility model.

[0029] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "configure", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] Example 1

[0031] Please refer to Figure 1-8The present embodiment provides a double-guide rail length measurement feeding device, including a rail frame 1, a loading frame 92, a feeding mechanism and a length measurement mechanism. The rail frame 1 is made of a rectangular tube, and a plurality of legs are fixed to the bottom of the rectangular tube, and the rectangular tube is fixed to the ground through the legs. Ball linear guides are installed on the top and side surfaces of the rail frame 1, respectively, wherein the top surface of the rail frame 1 is connected to the feeding clamping arm 2 through the ball linear guide, and the side surface of the rail frame 1 is connected to the length measurement positioning arm 5 through the ball linear guide, and the feeding clamping arm 2 and the length measurement positioning arm 5 are both L-shaped trusses, and the feeding clamping arm 2 and the length measurement positioning arm 5 are both equipped with servo motors to drive them to move on the rail frame 1. It should be noted that the supporting controllers, sensors and other components of the feeding clamping arm 2 and the length measurement positioning arm 5 can all adopt existing automatic control technologies.

[0032] The feeding clamping arm 2 is slidably arranged on the rail frame 1 and is provided with at least two clamping fixtures, each of which includes a base 21, a clamping cylinder 22, a V-shaped fixed clamping plate 23 and a movable clamping plate 24. The base 21 is fixed on the feeding clamping arm 2, the V-shaped fixed clamping plate 23 is fixed below the base 21 through a guide column, the clamping cylinder 22 is fixed to the base 21, the movable clamping plate 24 is connected to the piston rod of the clamping cylinder 22, and the movable clamping plate 24 can slide along the guide column. When the pipe is placed in the groove of the V-shaped fixed clamping plate 23, the clamping cylinder 22 extends downward, drives the movable clamping plate 24 downward to approach the V-shaped fixed clamping plate 23, and clamps the pipe with the movable clamping plate 24 and the V-shaped fixed clamping plate 23. This embodiment adopts the clamping structure of the movable clamping plate 24 and the V-shaped fixed clamping plate 23, which can adapt to the clamping of pipes of different diameters within a certain pipe diameter range, thereby improving the applicability of the equipment. Furthermore, in this embodiment, two clamping fixtures are arranged on the feeding clamping arm 2, and the clamping cylinders 22 of the two clamping fixtures operate independently, but the two clamping cylinders 22 can be synchronized by the controller, so that two pipes can be clamped and fed at the same time, and the two clamping cylinders 22 can clamp pipes of different diameters respectively. It should be noted that a feeding clamping laser sensor 25 is also installed on the base 21 to detect whether the clamping fixture is in contact with the end of the pipe.

[0033] In addition to the feeding clamping arm 2, the feeding mechanism also includes a feeding roller frame. Specifically, the feeding roller frame is provided with a plurality of multi-groove rollers 32. The multi-groove rollers 32 have at least two V-grooves. The number of V-grooves is consistent with the number of clamping fixtures. The present embodiment adopts two clamping fixtures, so the multi-groove rollers 32 of the present embodiment adopt two V-grooves, wherein, taking the rail frame 1 as a reference, the V-groove closest to the rail frame 1 is defined as the second V-groove, and the V-groove farthest from the rail frame 1 is defined as the first V-groove.

[0034] The feeding mechanism is also provided with a feeding flap 41, a feeding flap cylinder 42, a feeding horizontal push rod 43 and a feeding connecting rod 44. The feeding connecting rod 44 is L-shaped, and the feeding connecting rod 44 is hinged to the feeding frame at the bending corner. One end of the feeding connecting rod 44 is fixed to the feeding flap 41, and the other end of the feeding connecting rod 44 is connected to the feeding horizontal push rod 43. The piston rod of the feeding flap cylinder 42 is connected to the feeding horizontal push rod 43, and the feeding flap cylinder 42 is hinged to the feeding frame. When the feeding flap cylinder 42 retracts, the feeding connecting rod 44 is driven to rotate around the hinge axis by the feeding horizontal push rod 43, thereby realizing the rotation of the feeding flap 41, so that the feeding flap 41 is close to the multi-groove roller 32, and the feeding flap 41 is used to send the pipe to be cut on the transition plate 8 to the multi-groove roller 32.

[0035] The length measuring mechanism includes a length measuring positioning arm 5 and a length measuring positioning plate 6. The length measuring positioning arm 5 also adopts an L-shaped truss. A top plate 51 for pushing the pipe is installed on the length measuring positioning arm 5. At the same time, a pipe end sensor, such as a travel switch 52 and a first laser sensor 53, is installed. The length measuring roller frame and the feeding roller frame are arranged side by side on the left and right. The length measuring roller frame is provided with a plurality of V-groove rollers 76. The length measuring positioning plate 6 is fixed at one end of the length measuring roller frame, and the length measuring positioning plate 6 is provided with an in-position detection sensor, such as a first laser sensor 53. When the pipe is placed on the V-groove roller 76, the length measuring positioning arm 5 moves toward the length measuring positioning plate 6 until the end of the pipe triggers the travel switch 52, and the length measuring positioning arm 5 slows down. When the end of the pipe triggers the first laser sensor 53, the top plate 51 of the length measuring positioning arm 5 contacts the end of the pipe. The controller records the position of the length measuring positioning arm 5 at this time, and the length measuring positioning arm 5 continues to push the pipe through the top plate 51 until the other end of the pipe triggers the second laser sensor, that is, the length measuring positioning plate 6 contacts the end of the pipe. The controller calculates the length of the pipe according to Ltube=L-L0-L1-L2, wherein Ltube is the length of the pipe to be measured, L is the stroke from the origin of the length measuring positioning arm 5 to the length measuring positioning plate 6, L0 is the stroke of the length measuring positioning arm 5 from the origin of the length measuring positioning arm 5 to when the pipe triggers the travel switch 52, L1 is the stroke of the length measuring positioning arm 5 from the pipe triggering the travel switch 52 to triggering the first laser sensor 53, and L2 is the stroke of the length measuring positioning arm 5 from the pipe triggering the first laser sensor 53 to the pipe triggering the second laser sensor. The value of L is set in the controller after manual adjustment.

[0036] The length measuring roller frame is also provided with a length measuring flap 72, a length measuring flap cylinder 73, a length measuring horizontal push rod 74 and a length measuring connecting rod 75. The length measuring connecting rod 75 is L-shaped, and the bending corner of the length measuring connecting rod 75 is hinged to the length measuring frame body. One end of the length measuring connecting rod 75 is fixed to the length measuring flap 72, and the other end of the length measuring connecting rod 75 is connected to the length measuring horizontal push rod 74. The piston rod of the length measuring flap cylinder 73 is connected to the length measuring horizontal push rod 74, and the length measuring flap cylinder 73 is hinged to the length measuring frame body. When the length measuring flap cylinder 73 is extended, the length measuring connecting rod 75 is driven to rotate around the hinge axis through the length measuring horizontal push rod 74, thereby realizing the rotation of the length measuring flap 72, transferring the unmeasured pipe on the loading rack 92 to the V-groove roller 76, and at the same time transferring the V-groove roller 76 to the transition plate 8.

[0037] It should be noted that the transition plate 8 is installed between the feeding roller frame and the length measuring roller frame, and the heights of the length measuring flap 72 and the feeding flap 41 are both higher than the transition plate 8, so as to realize the transfer of the pipe. The length measuring flap 72 is provided with a three-level sawtooth groove, and the high point of the first-level length measuring sawtooth groove of the length measuring flap 72 is located on the loading rack 92, so that the unmeasured pipe on the loading rack 92 can slide along the high point of the first-level length measuring sawtooth groove to the low point of the first-level length measuring sawtooth groove, and the low point of the first-level length measuring sawtooth groove is located on the A surface of the V-groove roller 76, and the high point of the second-level length measuring sawtooth groove is located on the A surface of the V-groove roller 76. When the length measuring flap 72 is turned up, the measured pipe in the V-groove roller 76 can slide along the second-level length measuring sawtooth groove. The high point of the first-stage sawtooth groove slides toward the low point of the second-stage sawtooth groove for measuring length, that is, the measured pipe in the V-groove roller 76 is transferred to the transition first-stage sawtooth groove of the transition plate 8, the low point of the second-stage sawtooth groove for measuring length is located at the inclined surface section of the transition first-stage sawtooth groove of the transition plate 8, the high point of the third-stage sawtooth groove for measuring length is located at the inclined surface section of the transition first-stage sawtooth groove of the transition plate 8, the low point of the third-stage sawtooth groove for measuring length is located at the inclined surface section of the transition second-stage sawtooth groove of the transition plate 8, when the length measuring flap 72 is turned up, so that the measured pipe in the transition first-stage sawtooth groove slides along the high point of the third-stage sawtooth groove for measuring length to the low point of the third-stage sawtooth groove for measuring length, that is, the measured pipe in the transition first-stage sawtooth groove is transferred to the transition second-stage sawtooth groove.

[0038] It should be noted that the high point of the first-stage feeding sawtooth groove of the feeding flap 41 is located at the inclined section of the second-stage transition sawtooth groove of the transition plate 8, and the low point of the first-stage feeding sawtooth groove of the feeding flap 41 is located at the B surface of the first V-shaped groove of the multi-groove roller 32. When the feeding flap 41 is turned up, the measured pipe in the second-stage transition sawtooth groove slides along the high point of the first V-shaped groove to the low point of the first V-shaped groove, that is, the measured pipe in the second-stage transition sawtooth groove is transferred to the first V-shaped groove; The high point of the secondary feeding serration of the feeding flap 41 is located on the B surface of the first V-groove of the multi-groove roller 32, and the low point of the secondary feeding serration of the feeding flap 41 is located on the C surface of the second V-groove of the multi-groove roller 32. When the feeding flap 41 is turned up, the pipe in the first V-groove slides along the high point of the second V-groove to the low point of the second V-groove, that is, the pipe in the second V-groove is transferred to the second V-groove, so that two pipes can be fed and cut at the same time.

[0039] This embodiment uses at least two clamping tools to achieve double-tube positioning and clamping. Each clamping tool can clamp pipes of different calibers, so that the entire device can adapt to the clamping and feeding of pipes of different calibers, thereby improving labor efficiency, reducing labor intensity, and improving production benefits.

[0040] When this embodiment is in use, the pipe to be measured on the loading rack 92 is transferred to the V-groove roller 76 of the length measuring roller rack through the length measuring flap 72, and the length of the pipe is measured through the length measuring positioning arm 5 and the length measuring positioning plate 6. Then, the measured pipe is transferred to the multi-groove roller 32 of the feeding roller rack through the length measuring flap 72, the transition plate 8, and the feeding flap 41. Thereafter, the feeding clamping arm 2 moves toward the sawing machine 91 with one side of the length measuring positioning plate 6 as the origin until the feeding clamping laser sensor 25 senses the end of the pipe. Then, under the control of the controller, the feeding clamping cylinder 22 is actuated to drive the clamping tooling to clamp the pipe, and then the feeding clamping arm 2 is used to drive the pipe to move toward the sawing machine 91 to achieve pipe cutting and feeding.

[0041] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A double-guide rail length measuring and feeding device, characterized in that: It includes a rail frame, a loading frame, a feeding mechanism and a length measuring mechanism. The feeding mechanism includes a feeding clamping arm and a feeding roller frame. The feeding clamping arm is slidably arranged on the rail frame and is provided with at least two clamping fixtures. The length measuring mechanism comprises a length measuring positioning arm, a length measuring positioning plate and a length measuring roller frame. The length measuring roller frame and the feeding roller frame are arranged side by side on the left and right. The length measuring positioning arm is slidably arranged on the rail frame, and the length measuring positioning arm is provided with a top plate and a pipe end sensor. The length measuring positioning plate is fixed to one end of the length measuring roller frame, and the length measuring positioning plate is provided with an in-place detection sensor.

2. A double-guide rail length measuring and feeding device according to claim 1, characterized in that: The clamping tooling includes a base, a clamping cylinder, a V-shaped fixed clamping plate and a movable clamping plate. The base is fixed to the feeding clamping arm, and the V-shaped fixed clamping plate is fixed to the base through a guide column. The clamping cylinder is fixed to the base, and the movable clamping plate is connected to the piston rod of the clamping cylinder, and the movable clamping plate can slide along the guide column.

3. A double-guide rail length measuring and feeding device according to claim 2, characterized in that: The feeding roller frame is provided with a plurality of multi-groove rollers, each of which has at least two V-grooves, and the number of the V-grooves is consistent with the number of the clamping fixtures.

4. A double-guide rail length measuring and feeding device according to claim 3, characterized in that: The length measuring roller frame is provided with a plurality of V-groove rollers.

5. A double-guide rail length measuring and feeding device according to claim 4, characterized in that: The measuring roller frame is provided with a measuring flap, the feeding roller frame is provided with a feeding flap, and a transition plate is provided between the feeding roller frame and the measuring roller frame. The heights of the measuring flap and the feeding flap are both higher than the transition plate. The length measuring flap is provided with a three-level sawtooth groove, the high point of the first-level sawtooth groove of the length measuring flap is located at the loading rack, the low point of the first-level sawtooth groove is located at the A surface of the V-groove roller, the high point of the second-level sawtooth groove is located at the A surface of the V-groove roller, the low point of the second-level sawtooth groove is located at the inclined surface section of the first-level transition sawtooth groove of the transition plate, the high point of the third-level sawtooth groove is located at the inclined surface section of the first-level transition sawtooth groove of the transition plate, and the low point of the third-level sawtooth groove is located at the inclined surface section of the second-level transition sawtooth groove of the transition plate, The high point of the first feeding serration of the feeding flap is located at the inclined section of the second transition serration of the transition plate, the low point of the first feeding serration of the feeding flap is located at the B surface of the first V-groove of the multi-groove type roller, the high point of the second feeding serration of the feeding flap is located at the B surface of the first V-groove of the multi-groove type roller, and the low point of the second feeding serration of the feeding flap is located at the C surface of the second V-groove of the multi-groove type roller.

6. A double-guide rail length measuring and feeding device according to claim 5, characterized in that: The feeding roller frame is also provided with a feeding flap cylinder, a feeding horizontal push rod and a feeding connecting rod. The feeding connecting rod is L-shaped, and the bending corner of the feeding connecting rod is hinged to the feeding frame body. One end of the feeding connecting rod is fixed to the feeding flap, and the other end of the feeding connecting rod is connected to the feeding horizontal push rod. The piston rod of the feeding flap cylinder is connected to the feeding horizontal push rod, and the feeding flap cylinder is hinged to the feeding frame body.

7. A double-guide rail length measuring and feeding device according to claim 5, characterized in that: The length measuring roller frame is also provided with a length measuring flap cylinder, a length measuring horizontal push rod and a length measuring connecting rod. The length measuring connecting rod is L-shaped, and the bending corner of the length measuring connecting rod is hinged to the length measuring frame body. One end of the length measuring connecting rod is fixed to the length measuring flap, and the other end of the length measuring connecting rod is connected to the length measuring horizontal push rod. The piston rod of the length measuring flap cylinder is connected to the length measuring horizontal push rod, and the length measuring flap cylinder is hinged to the length measuring frame body.

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