Clamping tool for table tennis bat processing

Abstract

The utility model discloses a clamping tool for table tennis bat processing, which comprises a base placed on a workbench. The clamping mechanism is used for clamping and limiting the racket face of the table tennis racket, the lifting mechanism is used for lifting the racket face of the table tennis racket, the positioning mechanism is used for clamping and positioning a racket handle of the table tennis racket, the clamping mechanism is arranged at one end of the upper portion of the base, and the lifting mechanism is assembled on the inner side of the clamping mechanism; the table tennis bat lifting device has the advantages that the table tennis bat lifting device is simple in structure, the clamping mechanism is arranged to be matched with the lifting mechanism, the periphery of the bat face of a table tennis bat is clamped and limited through a clamping groove type structure, the table tennis bat is lifted and supported, and the table tennis bat lifting device is convenient to use and high in practicability. The table tennis bats can be effectively prevented from deviating or falling off, the clamping stability is high, the positioning mechanism is arranged, the positioning stability of the table tennis bats is further improved, and the machining precision of the table tennis bats is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of table tennis racket processing, in particular to a clamping tooling for table tennis racket processing. Background Art

[0002] In the prior art, a table tennis racket is the main equipment for table tennis players. A good table tennis racket can not only help you give full play to your best skills, but also improve your ball path, ball rotation and ball speed. The quality of the table tennis racket directly affects the experience of this sport. A table tennis racket consists of a bottom plate, rubber and sponge, which are bonded together by glue. In the existing production process, glue application or grinding is often carried out manually. Generally, people hold the table tennis racket with one hand and apply glue with a glue-brushing tool in the other hand, or place the table tennis racket on the processing table for direct grinding or engraving and other operations. The operation is rather troublesome, the consistency of glue application and engraving is poor, and there will be phenomena such as uneven glue application or low engraving accuracy, which directly affects the quality of the racket. At the same time, since the glue generally has toxicity, it is not easy to clean when contacting the skin, which will cause damage to the skin. And when engraving, due to the displacement of the bottom plate of the table tennis racket, it is easy to cause damage to the human body.

[0003] The Chinese utility model patent with the application number 202320437158.X discloses a glue application fixing base for the bottom plate of a table tennis racket, including a bottom plate. The outer side wall of the first fixing piece is fixedly connected with a second fixing piece. The outer side wall of the second fixing piece is fixedly connected with a cross plate through a connecting rod. The inner side wall of the second fixing piece is provided with a limiting groove. The inner side wall of the limiting groove is slidably connected with a limiting block. A movable block is fixedly connected between the limiting blocks. Both ends of the movable block are hinged with a first hinge piece. One end of the first hinge piece is hinged with a second hinge piece and one end of the second hinge piece is hinged with one end of the cross plate. The inner side wall of the first fixing piece is fixedly connected with an electric cylinder and the movable end of the electric cylinder is fixedly connected with the side wall of the movable block. However, this kind of glue application fixing base for the bottom plate of a table tennis racket clamps the table tennis racket through two groups of planar clamping structures, and its clamping stability is poor, and it is easy to have phenomena such as deviation or even falling off, which affects the processing accuracy of the table tennis racket. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a clamping tooling for table tennis racket processing.

[0005] To achieve the above purpose, the technical solution proposed by the utility model is:

[0006] A clamping tooling for table tennis racket processing, including a base placed on a workbench, further comprising a clamping mechanism for clamping and limiting the racket face of the table tennis racket, a lifting mechanism for lifting the racket face of the table tennis racket, and a positioning mechanism for clamping and positioning the racket handle of the table tennis racket. The clamping mechanism is arranged at one upper end of the base, the lifting mechanism is assembled inside the clamping mechanism, and the positioning mechanism is configured on the upper part of the base and arranged adjacent to the clamping mechanism.

[0007] The clamping mechanism includes clamping columns, clamping bases, clamping arms, and clamping blocks. There are two groups of clamping columns, and the two groups of clamping columns are symmetrically arranged above the base via a rotating assembly. There are two groups of clamping bases, and the two groups of clamping bases are respectively arranged at the upper ends of the two groups of clamping columns and fixedly connected to the corresponding clamping columns. There are two groups of clamping arms, and each group of clamping arms consists of two arms. The two groups of clamping arms are respectively arranged at both ends of the two groups of clamping bases and rotatably connected to the corresponding clamping bases. A limit locking block is provided at the connection between the clamping arm and the clamping base. There are two groups of clamping blocks, and each group of clamping blocks consists of two relatively arranged blocks. The two groups of clamping blocks are respectively arranged at the ends of the two groups of clamping arms away from the clamping bases and fixedly connected to the corresponding clamping arms.

[0008] An expansion wedge-shaped groove is provided on the side of the clamping block corresponding to the peripheral part of the racket face of the table tennis racket, and the clamping block is clamped with the peripheral part of the racket face of the table tennis racket through the expansion wedge-shaped groove.

[0009] The rotating assembly includes a rotating motor and a rotating substrate. The rotating motor is arranged at the upper part of one end of the base and fixedly connected to the base. The output end of the rotating motor is arranged upward. The rotating substrate is arranged at the output end of the rotating motor and fixedly connected to the output end of the rotating motor. The two groups of clamping columns are symmetrically arranged on both sides of the upper end of the rotating substrate and fixedly connected to the rotating substrate.

[0010] The lifting mechanism includes a lifting base, a lifting cylinder, and a lifting block. The lifting base is arranged inside the upper end of the rotating substrate and is slidably connected to the rotating substrate through a pin. The lifting cylinder is arranged at the upper part of one end of the lifting base and fixedly connected to the lifting base. The lifting cylinder is arranged vertically and its output end is arranged upward. The lifting block is arranged at the output end of the lifting cylinder and fixedly connected to the output end of the lifting cylinder.

[0011] The rotating substrate is provided with an installation chute corresponding to the lifting base, and the pin is slidably connected to the installation chute. The lifting base is slidably connected to the rotating substrate through the pin and the installation chute.

[0012] There are two sets of lifting mechanisms, which are arranged opposite to each other with a dislocation between the two sets of clamping struts and are located between the two sets of clamping arms.

[0013] The positioning mechanism includes a positioning housing, an adjusting component, and a positioning component. The positioning housing is arranged on the upper part of one end of the base away from the rotating motor and is fixedly connected to the base. The adjusting component is configured inside the positioning housing, and the positioning component is assembled on the upper part of the adjusting component corresponding to the clamping mechanism.

[0014] The adjusting component includes an adjusting cylinder, an adjusting mounting plate, and an adjusting support rod. The adjusting cylinder is arranged at the lower part inside the positioning housing and is fixedly connected to the positioning housing. The adjusting cylinder is horizontally arranged. The adjusting mounting plate is arranged at the output end of the adjusting cylinder, and one end of it is fixedly connected to the output end of the adjusting cylinder. The adjusting mounting plate is vertically arranged. The adjusting support rod is arranged corresponding to the adjusting cylinder at the upper end of the adjusting mounting plate, and one end of it is fixedly connected to the adjusting mounting plate. The adjusting support rod is located at the upper part inside the positioning housing.

[0015] The positioning component includes a positioning base plate, a positioning wrench, and a positioning clamp block. The positioning base plate is arranged at the upper part of one end of the adjusting support rod close to the clamping arm and is fixedly connected to the adjusting support rod. The positioning wrench is arranged on one side of the upper part of the positioning base plate and is assembled and connected to the positioning base plate through a positioning pin. The positioning clamp block is arranged on one side of the positioning base plate and is sleeved and connected to the positioning pin.

[0016] The beneficial effects of the present utility model are as follows:

[0017] The structure is simple. There is a cooperation between the clamping mechanism and the lifting mechanism. The circumferential part of the racket surface of the table tennis racket is clamped and limited through a slot-type structure, and a lifting support is provided for the table tennis racket, which can effectively avoid the phenomenon of offset or falling off of the table tennis racket. The clamping stability is strong. There is a positioning mechanism, which further improves the positioning stability of the table tennis racket and ensures the processing accuracy of the table tennis racket. Description of the Drawings

[0018] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0019] Figure 2 is a schematic diagram of the cooperation between the clamping mechanism and the lifting mechanism of the present utility model;

[0020] Figure 3 is a top view of the cooperation between the lifting mechanism and the clamping mechanism of the present utility model;

[0021] Figure 4 is a schematic diagram of the structure of the positioning mechanism of the present utility model.

[0022] In the figure: 1. Base; 2. Clamping pillar; 3. Clamping base; 4. Clamping arm; 5. Clamping block; 6. Rotating motor; 7. Rotating substrate; 8. Lifting base; 9. Lifting cylinder; 10. Lifting block; 11. Positioning housing; 12. Positioning cylinder; 13. Positioning mounting plate; 14. Positioning support rod; 15. Positioning substrate; 16. Positioning wrench; 17. Positioning clamp block. Detailed implementation manner

[0023] The present utility model will be further described in detail below with reference to the accompanying drawings.

[0024] A clamping tool for table tennis racket processing includes a base 1, and the base 1 is placed on a workbench. It also includes a clamping mechanism for clamping and limiting the racket face of the table tennis racket, a lifting mechanism for lifting the racket face of the table tennis racket, and a positioning mechanism for clamping and positioning the racket handle of the table tennis racket. The clamping mechanism is arranged at one end of the upper part of the base 1, the lifting mechanism is assembled inside the clamping mechanism, and the positioning mechanism is configured on the upper part of the base 1 and arranged adjacent to the clamping mechanism. The overall structural schematic diagram of the present utility model is as Figure 1 shown.

[0025] The clamping mechanism includes clamping pillars 2, clamping bases 3, clamping arms 4, and clamping blocks 5. There are two groups of clamping pillars 2, and the two groups of clamping pillars 2 are symmetrically arranged above the base 1 via a rotating assembly. There are two groups of clamping bases 3, and the two groups of clamping bases 3 are respectively arranged at the upper ends of the two groups of clamping pillars 2 and fixedly connected to the corresponding clamping pillars 2. There are two groups of clamping arms 4, and each group of clamping arms 4 is composed of two arms. The two groups of clamping arms 4 are respectively arranged at both ends of the two groups of clamping bases 3 and rotatably connected to the corresponding clamping bases 3. A limit locking block is provided at the connection between the clamping arm 4 and the clamping base 3. There are two groups of clamping blocks 5, and each group of clamping blocks 5 is composed of two relatively arranged blocks. The two groups of clamping blocks 5 are respectively arranged at the ends of the two groups of clamping arms 4 away from the clamping base 3 and fixedly connected to the corresponding clamping arms 4. An expansion wedge-shaped groove is provided on the side of the clamping block 5 corresponding to the peripheral part of the racket face of the table tennis racket. The clamping block 5 is clamped with the peripheral part of the racket face of the table tennis racket through the expansion wedge-shaped groove to clamp and position the racket face of the table tennis racket. Among them, the clamping pillar 2 is used to provide installation support for the clamping base 3, the clamping base 3 is used to provide installation support for the clamping arm 4, the clamping arm 4 is used to provide installation support for the clamping block 5, and the clamping block 5 is used to clamp and position the peripheral part of the racket face of the table tennis racket through the expansion wedge-shaped groove. The locking and positioning between the clamping arm 4 and the clamping base 3 can be realized through the limit locking block. The limit locking block can adopt a limit block with a locking function in the prior art. The installation angle between the clamping arm 4 and the clamping base 3 can be adjusted and locked and positioned by the limit locking block to realize the adjustment and fixation of the installation angle. The cooperation schematic diagram of the clamping mechanism and the lifting mechanism of the present utility model is asFigure 2 as shown

[0026] The rotating assembly includes a rotating motor 6 and a rotating base plate 7. The rotating motor 6 is arranged at the upper part of one end of the base 1 and fixedly connected to the base 1. The output end of the rotating motor 6 is arranged upward. The rotating base plate 7 is arranged at the output end of the rotating motor 6 and fixedly connected to the output end of the rotating motor 6. Two sets of clamping struts 2 are symmetrically arranged on both sides of the upper end of the rotating base plate 7 and fixedly connected to the rotating base plate 7. The rotating assembly cooperates with the rotating motor 6 and the rotating base plate 7 to provide rotational support for the clamping mechanism and the lifting mechanism. Among them, the rotating motor 6 is used to provide installation support for the rotating base plate 7 and drive the rotating base plate 7 to rotate, and the rotating base plate 7 is used to provide installation support for the clamping mechanism and the lifting mechanism and rotate under the action of the rotating motor 6 to meet the user's need to adjust the processing angle of the table tennis racket during the processing process.

[0027] The lifting mechanism includes a lifting base 8, a lifting cylinder 9 and a lifting block 10. The lifting base 8 is arranged inside the upper end of the rotating base plate 7 and is slidably connected to the rotating base plate 7 through a pin. The lifting cylinder 9 is arranged at the upper part of one end of the lifting base 8 and fixedly connected to the lifting base 8. The lifting cylinder 9 is arranged vertically and its output end is arranged upward. The lifting block 10 is arranged at the output end of the lifting cylinder 9 and fixedly connected to the output end of the lifting cylinder 9. The rotating base plate 7 is provided with an installation chute corresponding to the lifting base 8, and the pin is slidably connected to the installation chute. The lifting base 8 is slidably connected to the rotating base plate 7 through the pin and the installation chute. There are two sets of lifting mechanisms, and the two sets of lifting mechanisms are arranged in a staggered and opposite manner between the two sets of clamping struts 2 and located between the two sets of clamping arms 4. The lifting mechanism cooperates with the lifting base 8, the lifting cylinder 9 and the lifting block 10 to provide lifting support for the racket surface of the table tennis racket to ensure the processing stability of the table tennis racket. Among them, the lifting base 8 is used to provide installation support for the lifting cylinder 9 and drive the lifting cylinder 9 to slide along the rotating base plate 7 under the action of the pin, so as to adjust the positions of the lifting cylinder 9 and the lifting block 10. The lifting cylinder 9 is used to provide installation support for the lifting block 10 and adjust the height of the lifting block 10 through the telescopic movement of its output end. The lifting block 10 is used to provide lifting support for the racket surface of the table tennis racket under the action of the lifting cylinder 9 to cooperate with the clamping block 5 to improve the clamping stability of the table tennis racket. The top view of the cooperation between the lifting mechanism and the clamping mechanism of the present utility model is as Figure 3 as shown

[0028] The positioning mechanism includes a positioning housing 11, an adjustment component, and a positioning component. The positioning housing 11 is arranged at the upper part of one end of the base 1 away from the rotating motor 6 and is fixedly connected to the base 1. The adjustment component is configured inside the positioning housing 11. The positioning component is correspondingly assembled above the adjustment component for the clamping mechanism. The positioning mechanism cooperates through the positioning housing 11, the adjustment component, and the positioning component to clamp and position the handle of the table tennis racket. Among them, the positioning housing 11 is used to provide installation support for the adjustment component and the positioning component. The adjustment component is used to provide installation support for the positioning component and adjust the horizontal position of the positioning component. The positioning component is used to clamp and position the handle of the table tennis racket. The structural schematic diagram of the positioning mechanism of the present invention is as shown in Figure 4 shown.

[0029] The adjustment component includes an adjustment cylinder 12, an adjustment mounting plate 13, and an adjustment support rod 14. The adjustment cylinder 12 is arranged at the lower part inside the positioning housing 11 and is fixedly connected to the positioning housing 11. The adjustment cylinder 12 is horizontally arranged. The adjustment mounting plate 13 is arranged at the output end of the adjustment cylinder 12 and one end thereof is fixedly connected to the output end of the adjustment cylinder 12. The adjustment mounting plate 13 is vertically arranged. The adjustment support rod 14 is correspondingly arranged above the adjustment cylinder 12 at the upper end of the adjustment mounting plate 13 and one end thereof is fixedly connected to the adjustment mounting plate 13. The adjustment support rod 14 is located at the upper part inside the positioning housing 11. The adjustment component cooperates through the adjustment cylinder 12, the adjustment mounting plate 13, and the adjustment support rod 14 to provide installation support for the positioning component and adjust the horizontal position of the positioning component. Among them, the adjustment cylinder 12 is used to provide installation support for the adjustment mounting plate 13 and drive the adjustment mounting plate 13 to move horizontally through the telescopic movement of its output end. The adjustment mounting plate 13 is used to provide installation support for the adjustment support rod 14 and drive the adjustment support rod 14 to move horizontally under the action of the adjustment cylinder 12. The adjustment support rod 14 is used to provide installation support for the positioning component and adjust the horizontal position of the positioning component under the drive of the adjustment mounting plate 13.

[0030] The positioning component includes a positioning base plate 15, a positioning wrench 16, and a positioning clamping block 17. The positioning base plate 15 is arranged at the upper part of one end of the adjustment support rod 14 close to the clamping support arm 4 and is fixedly connected to the adjustment support rod 14. The positioning wrench 16 is arranged on one side of the upper part of the positioning base plate 15 and is assembled and connected to the positioning base plate 15 through a positioning pin. The positioning clamping block 17 is arranged on one side of the positioning base plate 15 and is sleeved and connected to the positioning pin. The positioning component cooperates through the positioning base plate 15, the positioning wrench 16, and the positioning clamping block 17 to clamp and position the handle of the table tennis racket. Among them, the positioning base plate 15 is used to provide installation support for the positioning wrench 16. The positioning wrench 16 is used to provide installation support for the positioning clamping block 17 and install and cooperate the positioning clamping block 17 with the positioning base plate 15. The positioning clamping block 17 is used to move under the action of the positioning wrench 16 to adjust the distance between it and the positioning base plate 15, so as to clamp and position the handle of the table tennis racket.

[0031] Working principle:

[0032] When the table tennis racket needs to be processed, such as when applying glue or engraving on the table tennis racket, adjust the positions of the two sets of lifting mechanisms according to the specifications of the table tennis racket. Place the racket face of the table tennis racket on the upper end of the lifting mechanism. Then, adjust the installation angle between the clamping arm 4 and the clamping base 3 and lock and position the two through the limit locking block to achieve the adjustment and fixation of the installation angle, so that the clamping block 5 clamps and positions the peripheral part of the racket face of the table tennis racket through the expansion wedge groove, and place the racket handle of the table tennis racket between the positioning clamp block 17 and the positioning substrate 15. Pull the positioning wrench 16 to adjust the distance between it and the positioning substrate 15, so as to clamp and position the racket handle of the table tennis racket, and then the table tennis racket can be processed. When engraving the table tennis racket, only the racket face of the table tennis racket can be clamped and positioned, and the clamping mechanism and the lifting mechanism are driven to rotate through the rotating assembly, so as to drive the table tennis racket to rotate a certain angle to meet the engraving needs of the user.

[0033] The beneficial effect of the utility model is that the structure is simple. There is a cooperation between the clamping mechanism and the lifting mechanism. The peripheral part of the racket face of the table tennis racket is clamped and limited through the card slot structure and the table tennis racket is provided with lifting support, which can effectively avoid the phenomenon of offset or falling off of the table tennis racket, and the clamping stability is strong. There is a positioning mechanism, which further improves the positioning stability of the table tennis racket and ensures the processing accuracy of the table tennis racket.

[0034] The above has described in detail an embodiment of the present utility model, but the content is only the preferred embodiment of the present utility model and cannot be considered as used to limit the implementation scope of the present utility model. All equal changes and improvements made according to the scope of the application of the present utility model should still fall within the scope covered by the patent of the present utility model.

Claims

1. A clamping tooling for table tennis racket processing, including a base (1), the base (1) is placed on a workbench, and it is characterized in that, It further includes a clamping mechanism for clamping and limiting the racket face of the table tennis racket, a lifting mechanism for lifting the racket face of the table tennis racket, and a positioning mechanism for clamping and positioning the racket handle of the table tennis racket. The clamping mechanism is arranged at one upper end of the base (1), the lifting mechanism is assembled inside the clamping mechanism, and the positioning mechanism is configured on the upper part of the base (1) and arranged adjacent to the clamping mechanism; The clamping mechanism includes clamping columns (2), clamping bases (3), clamping arms (4) and clamping blocks (5). There are two groups of clamping columns (2). The two groups of clamping columns (2) are symmetrically arranged above the base (1) via a rotating assembly. There are two groups of clamping bases (3). The two groups of clamping bases (3) are respectively arranged at the upper ends of the two groups of clamping columns (2) and fixedly connected to the corresponding clamping columns (2). There are two groups of clamping arms (4). Each group of clamping arms (4) consists of two arms. The two groups of clamping arms (4) are respectively arranged at both ends of the two groups of clamping bases (3) and rotatably connected to the corresponding clamping bases (3). A limit locking block is provided at the connection between the clamping arm (4) and the clamping base (3). There are two groups of clamping blocks (5). Each group of clamping blocks (5) consists of two oppositely arranged blocks. The two groups of clamping blocks (5) are respectively arranged at the ends of the two groups of clamping arms (4) far from the clamping bases (3) and fixedly connected to the corresponding clamping arms (4).

2. The clamping tooling for table tennis racket processing according to claim 1, characterized in that, An expansion wedge-shaped groove is provided on the side of the clamping block (5) corresponding to the circumferential part of the racket face of the table tennis racket. The clamping block (5) is clamped with the circumferential part of the racket face of the table tennis racket through the expansion wedge-shaped groove.

3. The clamping tooling for table tennis racket processing according to claim 2, characterized in that, The rotating assembly includes a rotating motor (6) and a rotating substrate (7). The rotating motor (6) is arranged at the upper part of one end of the base (1) and fixedly connected to the base (1). The output end of the rotating motor (6) is arranged upward. The rotating substrate (7) is arranged at the output end of the rotating motor (6) and fixedly connected to the output end of the rotating motor (6). The two groups of clamping columns (2) are symmetrically arranged on both sides of the upper end of the rotating substrate (7) and fixedly connected to the rotating substrate (7).

4. The clamping tooling for table tennis racket processing according to claim 3, characterized in that, The lifting mechanism includes a lifting base (8), a lifting cylinder (9) and a lifting block (10). The lifting base (8) is arranged inside the upper end of the rotating substrate (7) and slidably connected to the rotating substrate (7) through a pin. The lifting cylinder (9) is arranged at the upper part of one end of the lifting base (8) and fixedly connected to the lifting base (8). The lifting cylinder (9) is arranged vertically and its output end is arranged upward. The lifting block (10) is arranged at the output end of the lifting cylinder (9) and fixedly connected to the output end of the lifting cylinder (9).

5. The clamping tooling for table tennis racket processing according to claim 4, characterized in that, An installation sliding groove is provided on the rotating substrate (7) corresponding to the lifting base (8). The pin is slidably connected to the installation sliding groove. The lifting base (8) is slidably connected to the rotating substrate (7) through the pin and the installation sliding groove.

6. The clamping tooling for table tennis racket processing according to claim 5, characterized in that, There are two sets of lifting mechanisms, which are arranged offset relative to each other between the two sets of clamping struts (2) and are located between the two sets of clamping arms (4).

7. The clamping tooling for table tennis racket processing according to claim 6, wherein The positioning mechanism includes a positioning housing (11), an adjustment assembly, and a positioning assembly. The positioning housing (11) is arranged on the upper part of one end of the base (1) away from the rotation motor (6) and is fixedly connected to the base (1). The adjustment assembly is configured inside the positioning housing (11), and the positioning assembly is correspondingly assembled on the upper part of the adjustment assembly for the clamping mechanism.

8. The clamping tooling for processing a table tennis racket according to claim 7, wherein, The adjustment assembly includes an adjustment cylinder (12), an adjustment mounting plate (13), and an adjustment support rod (14). The adjustment cylinder (12) is arranged at the lower part inside the positioning housing (11) and is fixedly connected to the positioning housing (11). The adjustment cylinder (12) is horizontally arranged. The adjustment mounting plate (13) is arranged at the output end of the adjustment cylinder (12), and one end of it is fixedly connected to the output end of the adjustment cylinder (12). The adjustment mounting plate (13) is vertically arranged. The adjustment support rod (14) is correspondingly arranged relative to the adjustment cylinder (12) at the upper end of the adjustment mounting plate (13), and one end of it is fixedly connected to the adjustment mounting plate (13). The adjustment support rod (14) is located at the upper part inside the positioning housing (11).

9. The clamping tooling for table tennis racket processing according to claim 8, characterized in that, The positioning assembly includes a positioning substrate (15), a positioning wrench (16), and a positioning clamp block (17). The positioning substrate (15) is arranged at the upper part of one end of the adjustment support rod (14) close to the clamping arm (4) and is fixedly connected to the adjustment support rod (14). The positioning wrench (16) is arranged on one side of the upper part of the positioning substrate (15) and is assembled and connected to the positioning substrate (15) through a positioning pin. The positioning clamp block (17) is arranged on one side of the positioning substrate (15) and is sleeved and connected to the positioning pin.

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