Double-pin online press fitting tool for variable displacement automobile air conditioner compressor main shaft assembly

Abstract

A double-pin online press fitting tool for a variable displacement automobile air conditioner compressor spindle assembly relates to the field of automobile air conditioner compressor spindle assemblies, and comprises a bottom plate, a transposition plate, positioning blocks, a support frame and a press pin seat, the transposition plate is hinged to the bottom plate, the positioning blocks are fixedly connected to the bottom plate and can respectively and correspondingly limit two press fitting stations of the transposition plate, and the support frame is fixedly connected to the bottom plate. The supporting frame and the pin pressing base are fixedly installed on the transposition plate, a press-fitting working face is arranged at the top end of the pin pressing base, two guide holes penetrating through the pin pressing base are formed in the press-fitting working face, guide rods and guide springs are arranged in the guide holes, and the guide springs apply elastic acting force to the guide rods relative to the pin pressing base so that the guide rods can elastically stretch out of the press-fitting working face. The press-fitting device is applied to an automobile air conditioner compressor assembly production line in a matched mode, press-fitting operation of two long pin shafts in a main shaft assembly can be completed on one press-fitting tool only by arranging one stamping device, the press-fitting process can be simplified, the production cost can be reduced, the labor intensity can be reduced, and the assembly efficiency can be improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of automobile air conditioning compressor main shaft assembly, concretely relates to a double pin on -line press -fitting frock of variable displacement automobile air conditioning compressor main shaft assembly. BACKGROUND

[0002] The main shaft assembly in the automobile air conditioning compressor is the key component of power transmission of the compressor, and the main shaft assembly in the variable displacement automobile air conditioning compressor is composed of a main shaft, a push disc, a swash plate body, a sliding disc and a ball sleeve, and the utility model patent with the authorization announcement number CN210218018U discloses a "linkage mechanism swash plate type internal control variable displacement automobile air conditioning compressor main shaft assembly", specifically discloses that the push disc and the swash plate body are connected with each other by a linkage, the two ends of the linkage are hingedly connected with the push disc and the swash plate body through long pins, and the linkage and the long pins are fixedly connected in an interference fit mode to limit the relative movement between the long pin and the linkage, so as to reduce mechanical vibration in the operation process of the compressor, improve operation stability and reduce operation noise; in production, the connecting and assembling mode between the push disc and the swash plate body is usually to press the two long pins into the hinge holes between the linkage and the push disc and the linkage and the swash plate body by using a stamping device, therefore, two sets of stamping devices can be matched and arranged on the compressor assembly production line, and the two sets of stamping devices are used to press the main shaft assembly clamped on the press -fitting frock in turn at two operation stations, which undoubtedly obviously increases the production investment cost of the automobile air conditioning compressor, or only one set of stamping device can be matched and arranged, but the press -fitting operation of the two long pins must be carried out by the staff on the corresponding operation station, and this repeated operation mode obviously reduces the assembly production efficiency of the automobile air conditioning compressor, and is not conducive to the efficient operation of the compressor assembly production line. UTILITY MODEL CONTENTS

[0003] The utility model aims at providing a double pin on -line press -fitting frock of variable displacement automobile air conditioning compressor main shaft assembly, which is applied in the automobile air conditioning compressor assembly production line, reduces the production investment cost and improves the assembly production efficiency.

[0004] The application discloses a double-pin online press-fitting tool for a variable displacement automobile air conditioner compressor main shaft assembly, which comprises a bottom plate, a transposition plate, a positioning block, a support frame and a press pin seat, wherein the bottom plate and the transposition plate are both horizontally arranged plane plate bodies, the transposition plate and the positioning block are correspondingly arranged and connected on the upper end face of the bottom plate, the transposition plate is hingedly connected on the bottom plate and can rotate horizontally relative to the bottom plate, the positioning block is fixedly connected on the bottom plate and can correspondingly define two press-fitting positions of the transposition plate, namely a first press-fitting position and a second press-fitting position, the transposition plate can be interchanged between the first press-fitting position and the second press-fitting position by rotating relative to the bottom plate, the support frame and the press pin seat are correspondingly arranged and fixedly installed on the upper end face of the transposition plate, the support frame can horizontally balance and support the main shaft, the top end of the press pin seat is provided with a horizontally arranged press-fitting working face, two vertically arranged guide holes penetrating through the press pin seat are formed in the press-fitting working face, the guide holes are correspondingly matched with the hinge holes on the push disc lug, the swash plate lug and the connecting rod, in the state that the support frame balances and supports the main shaft, the push disc lug and the swash plate lug can be matched and arranged on the press-fitting working face, and the hinge holes on the push disc lug and the swash plate lug and the two hinge holes on the connecting rod are correspondingly coaxially communicated with the two guide holes, guide rods and guide springs are correspondingly arranged in the two guide holes, the guide springs are supported between the press pin seat and the guide rods, the guide rods can be elastically extended from the press-fitting working face and the maximum extension length H of the guide rods is limited by the press pin seat, the extended guide rods can be correspondingly inserted into the hinge holes on the push disc lug, the swash plate lug and the two ends of the connecting rod which are coaxially communicated with the two guide holes, when the transposition plate is located at the first press-fitting position, one of the hinge holes on the push disc lug and the swash plate lug is coaxially aligned with a punch head of a press-fitting device arranged on an automobile air conditioner compressor assembly production line, the punch head can be used to press-fit a long pin shaft into the hinge hole which is coaxially aligned with the punch head and cooperatively arranged with the corresponding end of the connecting rod, and when the transposition plate is located at the second press-fitting position, the other hinge hole on the push disc lug and the swash plate lug corresponding to the first press-fitting position is coaxially aligned with the punch head, the punch head can be used to press-fit a long pin shaft into the hinge hole which is coaxially aligned with the punch head and cooperatively arranged with the corresponding end of the connecting rod.

[0005] Preferably, the maximum extension length H of the guide rods relative to the pressing surface is greater than the single-ear height h1 of the push disc ear and the swash plate ear, so that the cooperation structure between the push disc ear and the connecting rod or the swash plate ear and the connecting rod can be defined by the two guide rods respectively before the pressing operation is performed. The maximum extension length H is also less than the double-ear height h2 of the push disc ear and the swash plate ear, so that the upper end of the hinge hole on the push disc ear and the swash plate ear is reserved with a guide space for the insertion of the long pin shaft for pressing.

[0006] Preferably, an accessory body is connected and installed on the pressing pin seat, and the top end of the accessory body is provided with a horizontally arranged pressing limiting surface. The pressing limiting surface corresponds to a horizontally arranged stroke limiting surface on the stamping head, so that the accessory body can form a limiting cooperation between the pressing limiting surface and the stroke limiting surface when the position changing plate is in the first pressing position or the second pressing position. Therefore, the maximum downward stroke of the stamping head is limited, and the safety and reliability of the pressing operation are ensured.

[0007] Preferably, a lock pin hole is formed in the accessory body and horizontally arranged through the accessory body and communicated with the two guide holes respectively. A lock pin and a lock pin spring are limited and inserted in the lock pin hole. The lock pin spring is supported between the accessory body and the lock pin and applies an elastic force to the lock pin towards the inside of the guide hole relative to the accessory body. The lock pin can be elastically inserted into the guide hole correspondingly. A first spring impact bead member is installed on the front end of the lock pin. Meanwhile, a ring-shaped groove is formed in the guide rod correspondingly. When the steel bead in the first spring impact bead member is fitted and inserted into the ring-shaped groove, the guide rod can be axially limited and locked. When the guide rod is limited and locked, the upper end of the guide rod is at the same horizontal height as the pressing limiting surface.

[0008] Preferably, an arc-shaped guide edge is arranged on the position changing plate. The arc-shaped guide edge is a circular arc curve shape with the hinge shaft between the position changing plate and the bottom plate as the center. A V-shaped clamping groove is formed in the arc-shaped guide edge. Two limiting blocks are fixedly installed on the bottom plate along the arc-shaped guide edge. Second spring impact bead members are installed on the limiting blocks correspondingly. The steel beads in the second spring impact bead members can be fitted and inserted into the V-shaped clamping groove to form an elastic limiting cooperation. The two limiting blocks are arranged correspondingly with the positioning blocks. When the positioning blocks correspondingly limit the position changing plate in the first pressing position or the second pressing position, the two positioning blocks can elastically lock the corresponding position state of the position changing plate. The structural stability of the pressing tool in different position states is enhanced, and the assembly production quality is ensured.

[0009] The utility model discloses a beneficial effect is, provide a kind of variable displacement automobile air conditioner compressor main shaft assembly double pin online press fitting tool, supporting application in automobile air conditioner compressor assembly production line, by setting rotatable transposition plate can control connecting rod two ends respectively with the hinged hole of push disc and swash plate body connection sequentially enter the press fitting station corresponding with press fitting device, long pin shaft stamping press fitting is into hinged hole, to be realized in automobile air conditioner compressor assembly production line only need to support setting 1 set stamping device, and in 1 press fitting tool without secondary clamping workpiece can be completed to the press fitting operation of 2 long pin shafts in automobile air conditioner compressor main shaft assembly, only need to turn the press fitting station of transposition plate in operation process can sequentially long pin shaft press fitting point accurately import to press fitting station, method is simple, easy to control, can fully guarantee the press fitting quality of long pin shaft and the reliability of connecting rod and push disc and swash plate body connection, applied in actual production when press fitting process can be simplified, reduce production investment cost, reduce worker labor intensity, improve assembly production efficiency, more beneficial to improve the overall operation efficiency of automobile air conditioner compressor assembly production line. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 It is variable displacement automobile air conditioner compressor main shaft assembly double pin online press fitting tool structure front view.

[0011] Figure 2 It is variable displacement automobile air conditioner compressor main shaft assembly double pin online press fitting tool structure side view.

[0012] Figure 3 It is Figure 2 A-A section view in the middle.

[0013] Figure 4 It is variable displacement automobile air conditioner compressor main shaft assembly double pin online press fitting tool side view under press fitting working condition.

[0014] Figure 5 It is Figure 4 I place local enlarged view in the middle.

[0015] Figure 6 It is variable displacement automobile air conditioner compressor main shaft assembly double pin online press fitting tool plan view under the condition that transposition plate is in first press fitting station.

[0016] Figure 7 It is variable displacement automobile air conditioner compressor main shaft assembly double pin online press fitting tool plan view under the condition that transposition plate is in second press fitting station.

[0017] Wherein: 1 is the base plate, 2 is the transposition plate, 3 is the positioning block, 4 is the support frame, 5 is the press pin seat, 6 is the guide rod, 7 is the guide spring, 8 is the limit block, 9 is the accessory, 10 is the stamping head, 11 is the main shaft, 12 is the push disc, 13 is the inclined disc, 14 is the connecting rod, 15 is the lock pin rod, 16 is the lock pin spring, 17 is the first spring pearl component, 18 is the second spring pearl component, 19 is the handle, 20 is the connecting screw, 21 is the rotating positioning sleeve, 22 is the push disc support lug, 23 is the inclined disc support lug, 24 is the arc-shaped through slot, 25 is the stamping rod, 26 is the plug, 27 is the sleeve, 28 is the handle, 29 is the long pin shaft. DETAILED DESCRIPTION

[0018] Further, the technical scheme claimed in the utility model is described in detail in combination with specific embodiments and drawings.

[0019] A double-pin on-line press-fitting tool for a variable-displacement automobile air conditioner compressor main shaft assembly, like Figures 1 to 7As shown, by base plate 1, transposition plate 2, positioning block 3, support frame 4, press pin seat 5, limit block 8 and accessory 9 are composed; the bottom plate 1 is rectangular plate body, the plate surface is connected with the transposition plate 2 and is correspondingly provided with the through arc-shaped slot 24 on the plate surface with connecting screw 20 as the center axis, the arc-shaped slot 24 is the circular arc curve shape with connecting screw 20 as the center and the middle line radius r, the rotating positioning sleeve 21 is inlaid between connecting screw 20 and transposition plate 2, so that transposition plate 2 can rotate smoothly relative to base plate 1, the two sides of transposition plate 2 are straight edges, the right side edge is provided with a handle 19, the front side has an arc-shaped guide edge with connecting screw 20 as the center, radius R, and circular arc curve shape, a V-shaped clamping groove is formed on the arc-shaped guide edge, an inlay groove is formed on the plate surface and communicates with the arc-shaped slot 24, and two positioning blocks 3 and two limit blocks 8 are respectively arranged on the base plate 1, the two positioning blocks 3 are respectively matched with the left side edge of the transposition plate 2 and the inner side edge of the handle 19 to limit the first pressing station and the second pressing station of the transposition plate 2, and the second spring ball impacting member 18 is arranged on the limit block 8, the second spring ball impacting member 18 can be elastically limited with the V-shaped clamping groove, the two limit blocks 8 are respectively arranged corresponding to the positioning blocks 3, and the position of the transposition plate 2 can be elastically locked in the first pressing station or the second pressing station limited by the positioning blocks 3; two support frames 4 and the press pin seat 5 are fixedly arranged on the transposition plate 2, a V-shaped bearing groove is formed on the support frame 4, the V-shaped bearing groove can balance the bearing shaft 11 at both ends, the top end face of the press pin seat 5 is a horizontal pressing surface, the lower end extends into the arc-shaped slot 24 formed in the base plate 1 through the inlay groove formed in the transposition plate 2, the front end side is fixedly provided with the accessory 9, the top end face of the accessory 9 is a horizontal pressing limiting surface, two vertical guide holes are formed in the pressing surface and extend through the upper and lower ends of the press pin seat 5, the guide holes are variable-diameter shaft holes, the lower end is closed by a threaded bushing 26, a guide rod 6 and a guide spring 7 are arranged in the hole, the guide rod 6 is a variable-diameter shaft rod corresponding to the structure of the guide hole, the shoulder face between the guide rod 6 and the guide hole can limit the upward movement stroke of the guide rod 6 in the guide hole, an annular groove is formed in the rod body, the guide spring 7 is supported between the threaded bushing 26 and the guide rod 6, and elastically supports the guide rod 6.A horizontal locking pin hole is formed on the front side of the accessory 9, which penetrates the accessory 9 and vertically communicates with the two guide holes through the press pin seat 5. A wire sleeve 27 is connected and installed on the outer side port of the locking pin hole. A locking pin rod 15 and a locking pin spring 16 are arranged in the hole. A first spring impact bead member 17 is installed on the front end of the locking pin rod 15. The first spring impact bead member 17 can form an elastic limiting fit with the annular groove formed on the guide rod 6. The tail end of the locking pin rod 15 extends to the outside of the locking pin hole, and a pull handle 28 is connected and installed on the end head. The locking pin spring 16 is supported between the wire sleeve 27 and the locking pin rod 15, and exerts an elastic force on the locking pin rod 15 towards the inside relative to the accessory 9, elastically supporting the locking pin rod 15. When the first spring impact bead member 17 is axially locked with the guide rod 6 in limiting fit with the annular groove, the upper end of the guide rod 6 is at the same horizontal height as the press limiting surface. Otherwise, the guide rod 6 can be elastically stretched upwards from the press working surface and can reach the maximum extension length H.

[0020] The double-pin online press-fitting tool for the variable displacement automobile air conditioner compressor main shaft assembly is used on an automobile air conditioner compressor assembly production line, and the specific operation method is as follows: before starting operation of the automobile air conditioner compressor assembly production line, the transposition plate 2 in the double-pin online press-fitting tool for the variable displacement automobile air conditioner compressor main shaft assembly is placed in the first press-fitting station, and the two guide rods 6 are axially locked by the locking pin rods 15, so that the guide rods 6 are retracted into the guide holes; then the double-pin online press-fitting tool for the variable displacement automobile air conditioner compressor main shaft assembly is positioned and installed at the press-fitting station on the automobile air conditioner compressor assembly production line, at this time, the stamping head 10 of the press-fitting device matched and installed on the press-fitting station is coaxially corresponding with the left guide hole on the press pin seat 5; after the automobile air conditioner compressor assembly production line is started, the main shaft 11 with the assembled thrust disc 12 and swash plate 13 is placed in the V-shaped bearing groove opened on the support frame 4, and the thrust disc lug 22 on the thrust disc 12 and the swash plate lug 23 on the swash plate 13 are placed on the press-fitting working surface at the upper end of the press pin seat 5, the two ends of the connecting rod 14 are respectively matched and embedded between the two thrust disc lugs 22 and the two swash plate lugs 23, and the coaxial hinge holes corresponding to each other are aligned, then the hinge holes on the thrust disc lug 22 and the hinge holes on the swash plate lug 23 are coaxially aligned with the two guide holes, the handle 28 is pulled in sequence, the axial limit of the guide rods 6 by the locking pin rods 15 is released, the guide rods 6 are released and extended upward from the press-fitting working surface, and when the upper end of the guide rod 6 reaches the maximum extension length H, the upper end of the guide rod 6 can enter the hinge hole of the connecting rod 14, the guide rods 6 fix the combined structure of the connecting rod 14, the thrust disc 12 and the swash plate 13, and also limit the loading position of the main shaft assembly on the double-pin online press-fitting tool for the variable displacement automobile air conditioner compressor main shaft assembly.A long pin shaft 29 is inserted into the punching hole on the punch head 10, the pressing device is started, the punch head 10 is controlled to move downward, the long pin shaft 29 will be inserted into the hinge hole on the push disc lug 22 as the punch head 10 moves downward, when the stroke limiting surface at the lower end of the punch head 10 corresponds to the pressing limiting surface on the top end of the auxiliary body 9, the punch head 10 reaches the maximum downward stroke, the punch rod 25 on the punch head 10 starts to further punch the long pin shaft 29, so that the long pin shaft 29 is separated from the punch head 10 and is integrally inserted into the combined hinge hole of the push disc lug 22 and the connecting rod 14, the long pin shaft 29 simultaneously pushes the guide rod 6 out of the combined hinge hole of the push disc lug 22 and the connecting rod 14, so that it is fully lowered and integrally recovered into the guide hole, and the annular groove on the rod body corresponds to the first spring ball contact member 17 on the lock pin rod 15, the guide rod 6 is re-axially locked by the lock pin rod 15, then the punch head 10 is controlled to be lifted to reset, and the hinge connection between the connecting rod 14 and the push disc 12 is completed; then, the main shaft assembly is kept in the loaded state on the double-pin online pressing device for the main shaft assembly of the variable displacement automobile air conditioner compressor, the handle 19 is forced to be pulled to overcome the elastic force between the second spring ball contact member 18 and the V-shaped clamping groove on the transposition plate 2, the elastic locking state of the transposition plate 2 is released, the transposition plate 2 is changed from the first pressing position to the second pressing position and is elastically locked by the corresponding another limiting block 8, at this time, the punch head 10 is changed to correspond to the guide hole on the right side of the pressing pin seat 5, a long pin shaft 29 is inserted into the punching hole on the punch head 10, then the pressing device is restarted to integrally insert the long pin shaft 29 into the combined hinge hole of the swash plate lug 23 and the connecting rod 14 and simultaneously push the guide rod 6 to be fully lowered and integrally recovered into the guide hole and be axially locked by the lock pin rod 15, then the punch head 10 is controlled to be lifted to reset, and the hinge connection between the connecting rod 14 and the swash plate 13 is completed; when the two guide rods 6 are all axially locked in the guide hole, the long pin shaft 29 pressing operation is completed, the assembled main shaft assembly is completely separated from the limiting constraint of the double-pin online pressing device for the main shaft assembly of the variable displacement automobile air conditioner compressor, and the operator can easily move it out, then the foregoing operation process is repeated to press the next automobile air conditioner compressor main shaft assembly, until all the production and processing work is completed.

Claims

1. A variable displacement automotive air conditioning compressor main shaft assembly double pin on-line press fitting tool, characterized in that, The utility model relates to a kind of automobile air conditioner compressor assembly production line, including: Bottom plate (1), transposition plate (2), locating block (3), support frame (4) and press pin seat (5);The bottom plate (1) and the transposition plate (2) are horizontal plane plate body, the transposition plate (2) and the locating block (3) are correspondingly arranged and connected and installed on the upper end surface of the bottom plate (1), wherein: the transposition plate (2) is hinged connection on the bottom plate (1), the locating block (3) is fixedly connected on the bottom plate (1) respectively, can be correspondingly limited the first press mounting station and the second press mounting station of the transposition plate (2), the transposition plate (2) can be rotated between the first press mounting station and the second press mounting station by relative to the bottom plate (1);The support frame (4) and the press pin seat (5) are correspondingly arranged and fixedly installed on the upper end surface of the transposition plate (2), the support frame (4) can be horizontally balanced and supported main shaft (11), the top of the press pin seat (5) has horizontally arranged press mounting face, 2 vertical and through the guide hole of the press pin seat (5) are opened on the press mounting face, the guide hole and the hinge hole structure on push disc lug (22), cam plate lug (23) and connecting rod (14) are correspondingly matched, in the state that the support frame (4) balanced and supported the main shaft (11), push disc lug (22) and cam plate lug (23) can be cooperatively arranged on the press mounting face, and make the hinge hole on push disc lug (22) and cam plate lug (23) and the two hinge holes on connecting rod (14) respectively with two guide holes coaxial communication;In two guide holes, guide rod (6) and guide spring (7) are correspondingly arranged, the guide spring (7) is supported between the press pin seat (5) and the guide rod (6), relative to the press pin seat (5) to the guide rod (6) and apply upward elastic force, so that two guide rods (6) can be elastically stretched from the press mounting face and the maximum extension length H of guide rod (6) is limited by the press pin seat (5);When the transposition plate (2) is in the first press mounting station, one of the hinge holes on push disc lug (22) and cam plate lug (23) and the punch head (10) of press mounting device matched on automobile air conditioner compressor assembly production line keep coaxial alignment, and when the transposition plate (2) is in the second press mounting station, the other hinge hole on push disc lug (22) and cam plate lug (23) corresponding to the first press mounting station is kept coaxial alignment with the punch head (10).

2. A double pin on-line press fitting tool for a variable displacement automotive air conditioning compressor main shaft assembly as set forth in claim 1, characterized in that: The maximum extension length H of the guide rod (6) relative to the press mounting face is greater than the single lug height h1 of push disc lug (22) and cam plate lug (23), and the maximum extension length H is also less than the double lug height h2 of push disc lug (22) and cam plate lug (23).

3. The double pin on-line press fitting tool for the main shaft assembly of a variable displacement automotive air conditioning compressor as set forth in claim 1 or 2, characterized in that: An auxiliary body (9) is connected and installed on the press pin seat (5), a top end of the auxiliary body (9) is provided with a horizontal press mounting limiting surface, the press mounting limiting surface corresponds to a horizontal stroke limiting surface on the punch head (10), so that the auxiliary body (9) can form a limiting cooperation between the press mounting limiting surface and the stroke limiting surface when the transposition plate (2) is in the first press mounting position or the second press mounting position, thereby limiting the maximum downward stroke of the punch head (10).

4. The double pin on-line press fitting tool for the main shaft assembly of a variable displacement automotive air conditioning compressor according to claim 3, characterized in that: A horizontal lock pin hole is formed in the auxiliary body (9) and communicates with the two guide holes through the auxiliary body (9) and the press pin seat (5), a lock pin rod (15) and a lock pin spring (16) are limited and inserted in the lock pin hole, the lock pin spring (16) is supported between the auxiliary body (9) and the lock pin rod (15) and applies an elastic force to the lock pin rod (15) towards the inside of the guide hole relative to the auxiliary body (9), so that the lock pin rod (15) can be elastically inserted into the guide hole, a first spring impact bead member (17) is installed on a front end of the lock pin rod (15), and a ring-shaped groove is formed in the guide rod (6), when a steel bead in the first spring impact bead member (17) is fitted and inserted into the ring-shaped groove, the guide rod (6) can be axially limited and locked, when the guide rod (6) is limited and locked, the upper end of the guide rod (6) is at the same horizontal height as the press mounting limiting surface.

5. The double pin on-line press fitting tool for the main shaft assembly of a variable displacement automotive air conditioning compressor as set forth in claim 4, characterized by: An arc-shaped guide edge is arranged on the transposition plate (2), the arc-shaped guide edge is a circular arc curve shape with the hinge shaft between the transposition plate (2) and the bottom plate (1) as the center, a V-shaped clamping groove is formed in the arc-shaped guide edge, two limiting blocks (8) are fixedly installed on the bottom plate (1) along the arc-shaped guide edge, a second spring impact bead member (18) is installed on each limiting block (8), a steel bead in the second spring impact bead member (18) can be fitted and inserted into the V-shaped clamping groove to form an elastic limiting cooperation, the two limiting blocks (8) are correspondingly arranged with the positioning block (3), when the positioning block (3) corresponds to limit the transposition plate (2) in the first press mounting position or the second press mounting position, the two limiting blocks (8) can elastically lock the corresponding position state of the transposition plate (2).

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