Universal tooth retreating clamp

Abstract

The utility model belongs to the technical field of machining, and particularly discloses a universal gear retreating clamp which comprises a fixing frame assembly, and the fixing frame assembly comprises a top plate and a first connecting plate perpendicularly fixed to the bottom of the top plate. A first notch is formed in the middle of one long edge of the top plate; the clamp assembly is fixed to the upper surface of the top plate and located above the first notch, the clamp assembly comprises a base plate and a supporting plate, the edge of the base plate is aligned with the edge of the top plate, and a second notch corresponding to the first notch is formed in the base plate; the supporting plate is movably connected with the base plate, and the size of the gap at the second notch is controlled by moving the supporting plate left and right. The device is simple in structure, easy to implement, suitable for dismounting gears with different sizes on a crankshaft, good in universality and high in practicability.

Description

Technical Field

[0001] The utility model belongs to the technical field of mechanical processing, and in particular relates to a universal tooth-retracting fixture. Background Art

[0002] Crankshafts are widely used in many mechanical systems that need to convert linear motion into rotational motion, such as engines, compressors, pumps and other industrial machinery, which can convert reciprocating motion into rotational power output.

[0003] The gears on the crankshaft play a key role in the engine and mechanical system. They transmit power, adjust the transmission ratio, change the axis direction, ensure the timing of the engine, and also play a balancing role when the crankshaft runs at high speed. The stable operation of the gears ensures the efficient and stable operation of the engine and mechanical devices, but in some cases (such as repair, replacement, upgrade, modification, fault diagnosis and preventive maintenance), the gears need to be removed from the crankshaft, that is, the gears need to be removed.

[0004] At present, the more common way to withdraw the gear is to use a support plate with a groove on the edge to pad under the gear, and then use stamping or other methods to act on the top of the crankshaft above the support plate to move the crankshaft downward, so that the crankshaft and the gear are in relative position, so that the gear is withdrawn from the crankshaft. However, the above method usually requires the replacement of different support plates according to the size of the gear, which is inconvenient to operate and has poor versatility. Utility Model Content

[0005] The utility model aims to provide a universal tooth-retracting clamp door, which has a simple structure and is easy to implement, is suitable for disassembling gears of different sizes on a crankshaft, has good versatility and strong practicability.

[0006] The technical solution adopted to achieve the purpose of this utility model is:

[0007] A universal tooth-retracting fixture comprises a fixed frame assembly, wherein the fixed frame assembly comprises a top plate and a first connecting plate vertically fixed to the bottom of the top plate; a first notch is provided in the middle of an edge of a long side of the top plate;

[0008] It also includes a clamp assembly fixed on the upper surface of the top plate and located above the first notch, the clamp assembly includes a pad and a support plate, the edge of the pad is aligned with the edge of the top plate, and a second notch corresponding to the first notch is opened on the pad; the support plate is movably connected to the pad, and the size of the gap at the second notch is controlled by moving the position of the support plate left and right.

[0009] Furthermore, the pad is a hollow box body with two ends penetrated, and the supporting plate is inserted into the pad from the end of the pad; the pad is fixed to the top plate by a first fixing bolt.

[0010] Furthermore, the fixed frame assembly further comprises a bottom plate fixed to the bottom of the first connecting plate and arranged parallel to the top plate; further comprises a movable support assembly arranged between the bottom plate and the top plate, and the movable support assembly is fixed to the bottom plate through a compression spring;

[0011] The movable support assembly comprises a lower movable plate, an upper movable plate and a second connecting plate which are arranged in parallel, and the lower movable plate is fixedly connected to the bottom plate through a compression spring.

[0012] Furthermore, there are two second connecting plates, which are arranged in parallel and are both located below the first notch;

[0013] It also includes a fixing member and a pressure plate. The two ends of the fixing member are respectively fixed on the two second connecting plates. The two ends of the fixing member are respectively fixedly connected to the pressure plate through adjusting bolts. The adjusting bolts are perpendicular to the second connecting plates, and an adjusting spring is provided on the outer sleeve of the adjusting bolt.

[0014] Furthermore, a plurality of vertically distributed bolt holes are provided on the second connecting plate; the fixing piece is in the shape of a "cross" as a whole, and bolt holes corresponding to the bolt holes on the second connecting plate are provided on both ends of the fixing piece, the rearward protrusion in the middle is stuck between the two second connecting plates, and a contact groove is provided on one side of the forward protrusion in the middle close to the pressure plate.

[0015] Furthermore, it also includes a first guide column and a second guide column, the first guide column passes through the lower movable plate and the upper movable plate, and the two ends are respectively fixedly connected to the bottom plate and the top plate; the lower end of the second guide column is fixed to the upper surface of the upper movable plate, and the upper end passes through the top plate and is suspended in the air;

[0016] It also includes a first guide sleeve fixed on the upper surface of the lower movable plate and a second guide sleeve fixed on the lower surface of the upper movable plate, and the first guide sleeve, the second guide sleeve and the compression spring are all sleeved outside the first guide column.

[0017] Furthermore, a limiting member is provided on the lower surface of the lower movable plate.

[0018] Furthermore, the first connecting plate and the second connecting plate are arranged in parallel, there are two first connecting plates, and the second connecting plate is located between the two first connecting plates; each first connecting plate is provided with a second through groove, and both ends of the upper movable plate and the lower movable plate pass through the second through groove.

[0019] Furthermore, a fixing seat is provided at the middle edge of the lower movable plate, and a height adjustment device cooperating with the fixing piece is provided on the fixing seat.

[0020] The beneficial effects of the utility model are:

[0021] 1. The device of the utility model adjusts the size of the gap at the second notch by adjusting the left and right movement of the support plate to adapt to gears of different sizes, and has good applicability and strong versatility.

[0022] 2. The overall operation of the device of the utility model is simple and easy to implement. After the support plate supports the gear, the top of the crankshaft is pressed down by the external hydraulic device, and the crankshaft moves downward. The pressure block is subjected to the downward extrusion force of the crankshaft and cooperates with the fixing part to drive the movable plate downward to squeeze the compression spring; the gear is blocked by the support plate and will not move downward with the crankshaft, and relative displacement occurs with the crankshaft, thereby removing the gear; after the hydraulic device is released, the entire crankshaft is removed, and the movable support assembly is reset under the action of the compression spring.

[0023] 3. The utility model adopts the cooperation of the guide column and the guide sleeve to prevent the movable support assembly from swinging left and right during the up and down movement, making the movement process more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the utility model will be further described below in conjunction with the accompanying drawings and embodiments. The drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work:

[0025] Figure 1 It is a schematic diagram of the overall structure of the device of the utility model.

[0026] Figure 2 It is a structural schematic diagram of the utility model after the first connecting plate is removed.

[0027] Figure 3 It is a structural schematic diagram of the utility model after the backing plate is removed and matched with the crankshaft that needs to be toothed back.

[0028] Figure 4 yes Figure 3 A schematic diagram of a top view structure.

[0029] In the figure: 1. fixed frame assembly; 2. mobile support assembly; 3. first notch; 4. second notch; 5. compression spring; 6. clamp assembly; 7. first through slot; 8. second through slot; 9. first fixing bolt; 10. fixing member; 11. pressure plate; 12. adjusting bolt; 13. adjusting spring; 14. contact groove; 15. first guide column; 16. second guide column; 17. first guide sleeve; 18. second guide sleeve; 19. stopper; 20. fixing seat; 21. height adjustment device; 22. crank arm; 23. main shaft neck; 24. balance block; 25. second fixing bolt;

[0030] 101. bottom plate; 102. top plate; 103. first connecting plate;

[0031] 201. Lower movable plate; 202. Upper movable plate; 203. Second connecting plate.

[0032] 601. Pad; 602. Support plate. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the following will be described clearly and completely in combination with the technical solution in the embodiments of the utility model. Obviously, the described embodiments are partial embodiments of the utility model, not all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the protection scope of the utility model.

[0034] like Figures 1 to 4 As shown, a universal tooth-retracting fixture comprises a fixed frame assembly 1 and a movable support assembly 2, wherein the fixed frame assembly 1 comprises a bottom plate 101, a top plate 102 and a first connecting plate 103 arranged in parallel, wherein the bottom plate 101 and the top plate 102 are fixedly connected via the first connecting plate 103, and a first notch 3 is provided in the middle of an edge of a long side of the top plate 102; the movable support assembly 2 is arranged between the bottom plate 101 and the top plate 102, and the movable support assembly 2 is fixed to the bottom plate 101 via a compression spring 5;

[0035] It also includes a clamp assembly 6 fixed on the upper surface of the top plate 102 and located above the first notch 3, the clamp assembly 6 includes a pad 601 and two support plates 602, the edge of the pad 601 is aligned with the edge of the top plate 102, and a second notch 4 corresponding to the first notch 3 is opened in the middle of the pad 601; the two support plates 602 are movably connected to the pad 601, and the size of the gap at the second notch 4 is controlled by moving the positions of the two support plates 602 left and right.

[0036] The tooth removal fixture of the utility model is mainly used to unload the gears on the crankshaft. The fixed frame assembly 1 as a whole plays the role of a supporting frame; the mobile support assembly 2 as a whole plays the role of bearing the weight of the crankshaft. The mobile support assembly 2 can move up and down between the bottom plate 101 and the top plate 102. The compression spring 5 mainly plays a supporting role. When the mobile support assembly 2 moves downward, the compression spring 5 is slowly compressed, and when it moves upward, the compression spring 5 is gradually reset. The clamp assembly 6 is mainly used to support the gears on the crankshaft.

[0037] The tooth removal fixture of the utility model adjusts the size of the gap at the second notch 4 by adjusting the left and right movement of the support plate 602 to adapt to gears of different sizes. In actual operation, first move the two support plates 602 to the two ends of the pad 601 to completely expose the second notch 4; then place the end of the crankshaft with the gear upward, and place the end of the crankshaft that does not match the gear in the first notch 3 and the second notch 4, and place the gear above the first notch 3 in the fixture assembly 6, and push the two support plates 602 toward the middle and place them at the bottom of the gear; the crank arm 22, the main journal 23 and the balance block 24 on the crankshaft are all placed below the first notch 3, that is, between the bottom plate 101 and the top plate 102. After the support plate 602 holds the gear, the top of the crankshaft is pressed down by an external hydraulic device, and the crankshaft moves downward, pushing the movable support assembly 2 to squeeze the compression spring 5 downward. At this time, the gear will not move downward with the crankshaft because it is blocked by the support plate 602, and will be relatively displaced with the crankshaft, thereby removing the gear. After the hydraulic device is released, the entire crankshaft is removed, and the mobile support assembly 2 is reset under the action of the compression spring 5.

[0038] like Figure 1 and Figure 2 As shown, the pad 601 is a hollow box body with two ends penetrated, and the two support plates 602 are respectively inserted into the pad 601 from both ends; the two support plates 602 are provided with a first through groove 7 penetrating the upper and lower surfaces of the support plates 602, and both ends of the pad 601 are fixed to the top plate 102 by a first fixing bolt 9, the first fixing bolt 9 penetrates the first through groove 7, and the width of the first through groove 7 is greater than the diameter of the first fixing bolt 9.

[0039] The above structure can flexibly adjust the left and right movement of the support plate 602. The first through slot 7 on the support plate 602 can reduce the weight and facilitate the hand force of the staff when pushing the support plate 602, which plays a labor-saving role. The pad 601 is a hollow box body, and its shape is similar to the outer box of a matchbox. The first fixing bolt 9 plays a role in fixing the pad 601 on the one hand, and on the other hand, it penetrates the first through slot 7 to limit the support plate 602, preventing the support plate 602 from being pulled out of the pad 601 during the movement to the left and right ends.

[0040] like Figures 1 to 3 As shown, the mobile support assembly 2 includes a lower moving plate 201, an upper moving plate 202 and a second connecting plate 203 arranged in parallel, and the lower moving plate 201 is fixedly connected to the bottom plate 101 by a compression spring 5. The lower moving plate 201 is close to the bottom plate 101, the upper moving plate 202 is close to the top plate 102, and the lower moving plate 201, the upper moving plate 202, the bottom plate 101 and the top plate 102 are all arranged in parallel.

[0041] Furthermore, there are two second connecting plates 203, which are arranged in parallel and are both located below the first notch 3;

[0042] It also includes a fixing member 10 and a pressure plate 11. The two ends of the fixing member 10 are respectively fixed on two second connecting plates 203. The two ends of the fixing member 10 are respectively fixedly connected to the pressure plate 11 through adjusting bolts 12. The adjusting bolts 12 are perpendicular to the second connecting plates 203, and an adjusting spring 13 is provided on the outer sleeve of the adjusting bolt 12.

[0043] The mobile support assembly 2 is mainly used to bear the weight of the crankshaft. When working, the crank arm 22, the main journal 23 and the balance block 24 of the crankshaft are placed above the pressure plate 11 as a whole. In actual use, the two support plates 602 are first moved to the two ends of the pad 601 to fully expose the second notch 4, and the adjusting bolt 12 is screwed to expose more of the adjusting bolt 12 between the pressure plate 11 and the fixing member 10, that is, the pressure plate 11 is away from the fixing member 10. Then the end with the gear on the crankshaft is upward, and the shaft of the crankshaft that matches the gear is placed in the first notch 3 and the second notch 4, and the gear is placed above the first notch 3 in the fixture assembly 6, and the two support plates 602 are pushed toward the middle and placed at the bottom of the gear; the crank arm 22, the main journal 23 and the balance block 24 on the crankshaft are all placed below the first notch 3 and above the pressure plate 11. Then the adjusting bolt 12 is screwed to expose less of the adjusting bolt 12 between the pressure plate 11 and the fixing member 10, that is, the pressure plate 11 is close to the fixing member 10. At this time, the lower part of the crankshaft is stuck between the two adjusting bolts 12, and the bottom of the balance block 24 presses the pressure block. After completing the above work, the top of the crankshaft is pressed down by the external hydraulic device, and the crankshaft moves downward. The pressure block is pressed downward by the crankshaft and cooperates with the fixing member 10 to drive the lower moving plate 201 to press the compression spring 5 downward. At this time, the gear will not move downward with the crankshaft because it is blocked by the support plate 602, and will be relatively displaced with the crankshaft, so that the gear can be removed. After the hydraulic device is released, the entire crankshaft is removed, and the mobile support assembly 2 is reset under the action of the compression spring 5.

[0044] like Figures 1 to 3 As shown, a plurality of vertically distributed bolt holes are provided on the second connecting plate 203; the fixing member 10 is in the shape of a "cross" as a whole, and bolt holes corresponding to the bolt holes on the second connecting plate 203 are provided on both ends of the fixing member 10, the rearward protrusion in the middle is stuck between the two second connecting plates 203, and the forward protrusion in the middle is provided with a contact groove 14 on one side close to the pressure plate 11.

[0045] The second connecting plate 203 is provided with a plurality of vertically distributed bolt holes to facilitate the flexible fixing of the fixing member 10 at any position on the second connecting plate 203. In actual design, it should be ensured that the bolt holes on the second connecting plate 203 match the bolt holes on the left and right ends of the fixing member 10. The rearward protrusion in the middle of the fixing member 10 is stuck between the two second connecting plates 203 to make the position of the fixing member 10 more stable, prevent position deviation, and improve the stability of the device. The forward protrusion in the middle is provided with a contact groove 14 on one side close to the pressing plate 11, which plays a role of giving way on the one hand, facilitating the placement of the crankshaft; on the other hand, it plays a role of limiting to prevent the crankshaft from swinging left and right. In the present utility model, the contact groove 14 can be U-shaped, C-shaped or V-shaped. Considering that the present utility model will process crankshafts of different sizes, in order to facilitate the limiting of the contact groove 14, it is preferred that the contact groove 14 is V-shaped. The V-shaped shape is suitable for crankshafts of different sizes, with good applicability and strong versatility.

[0046] In the present invention, there are two bolt holes at the left and right ends of the fixing member 10. At either end of the fixing member 10, the adjusting screw passes through one of the bolt holes and then extends into the bolt hole in the second connecting plate 203; the other bolt hole is only used to fix the fixing member 10 to the second connecting plate 203, and the fixing member 10 and the second connecting plate 203 are connected by the second fixing bolt 25.

[0047] like Figures 1 to 3 As shown, it also includes a first guide column 15 and a second guide column 16. The first guide column 15 passes through the lower moving plate 201 and the upper moving plate 202, and its two ends are fixedly connected to the bottom plate 101 and the top plate 102 respectively; the lower end of the second guide column 16 is fixed to the upper surface of the upper moving plate 202, and the upper end passes through the top plate 102 and is suspended in the air;

[0048] It also includes a first guide sleeve 17 fixed on the upper surface of the lower movable plate 201 and a second guide sleeve 18 fixed on the lower surface of the upper movable plate 202 , and the first guide sleeve 17 , the second guide sleeve 18 and the compression spring 5 are all sleeved outside the first guide column 15 .

[0049] The use of the guide column and the guide sleeve can prevent the movable support assembly 2 from swinging left and right during the up and down movement, making the movement process more stable.

[0050] like Figures 1 to 3 As shown, the lower surface of the lower movable plate 201 is also provided with a limiter 19. The function of the limiter 19 is to limit the maximum limit of the downward movement of the movable support assembly 2, which can prevent the spring from being over-compressed and worn, and prevent the bottom plate 101 from being damaged by impact under greater pressure.

[0051] like Figures 1 to 3As shown, the first connecting plate 103 and the second connecting plate 203 are arranged in parallel, the number of the first connecting plates 103 is two, and the second connecting plate 203 is located between the two first connecting plates 103; each first connecting plate 103 is provided with a second through slot 8, and both ends of the upper movable plate 202 and the lower movable plate 201 pass through the second through slot 8. The second through slot 8 can not only reduce weight, but also does not affect the normal operation of the movable support assembly 2.

[0052] like Figure 1 and Figure 2 As shown, a fixing seat 20 is further provided at the middle edge of the lower movable plate 201 , and a height adjustment device 21 cooperating with the fixing member 10 is provided on the fixing seat 20 .

[0053] The height adjustment device 21 of the utility model is mainly used to adjust the upper and lower positions of the fixing member 10. The height adjustment device 21 can be a hydraulic cylinder or a ground screw. In one embodiment of the utility model, when the height adjustment device 21 is a hydraulic cylinder, the bottom of the fixing member 10 is fixedly connected to the end of the output shaft of the hydraulic cylinder. When the fixing member 10 needs to be moved, the adjustment bolt 12 and other bolts on the fixing member 10 are first removed, and the fixing member 10 is adjusted to the corresponding height by the hydraulic cylinder, and then the fixing member 10 is fixed to the second connecting plate 203.

[0054] like Figure 2 As shown, in another embodiment of the utility model, when the height adjustment device 21 is a ground screw, the ground screw passes through the fixing member 10, and a screw hole that matches the ground screw is provided on the fixing member 10. The ground screw is a rotatable and movable ground screw, one end of the screw is provided with a thread that matches the screw hole on the fixing member 10, and the other end is placed in the base and limited by a nut to prevent the screw from being pulled out of the base. The outer surface of the base is provided with an adjustment nut fixedly connected to the screw. When the fixing member 10 needs to be moved, the adjustment nut is turned, the screw rotates, and the fixing member 10 can be displaced relative to the screw. The principle is similar to the working principle of a ball screw. Which height adjustment device 21 is specifically used can be selected according to actual needs.

[0055] The specific implementation methods described above further illustrate the purpose, technical solutions and beneficial effects of the utility model in detail. It should be understood that the above description is only a specific implementation method of the utility model and is not intended to limit the utility model. Any modifications, equivalent substitutions and improvements made within the scope of the utility model should be included in the protection scope of the utility model.

Claims

1. A universal tooth-retracting fixture, characterized in that: The fixed frame assembly (1) comprises a top plate (102) and a first connecting plate (103) vertically fixed to the bottom of the top plate; a first notch (3) is provided in the middle of an edge of a long side of the top plate (102); The invention also comprises a clamp assembly (6) fixed on the upper surface of the top plate (102) and located above the first notch (3); the clamp assembly (6) comprises a pad (601) and a support plate (602); the edge of the pad (601) is aligned with the edge of the top plate (102), and a second notch (4) corresponding to the first notch (3) is formed on the pad (601); the support plate (602) is movably connected to the pad (601), and the size of the gap at the second notch (4) is controlled by moving the position of the support plate (602) left and right.

2. The universal tooth-retracting fixture according to claim 1, characterized in that: The pad (601) is a hollow box body with two ends passing through it, and the support plate (602) is inserted into the pad (601) from the end of the pad (601); the pad (601) is fixed on the top plate (102) by a first fixing bolt (9).

3. The universal tooth-retracting fixture according to claim 1 or 2, characterized in that: The fixed frame assembly (1) further comprises a bottom plate (101) fixed to the bottom of the first connecting plate (103) and arranged parallel to the top plate (102); and further comprises a movable support assembly (2) arranged between the bottom plate (101) and the top plate (102), wherein the movable support assembly (2) is fixed to the bottom plate (101) via a compression spring (5); The movable support assembly (2) comprises a lower movable plate (201), an upper movable plate (202) and a second connecting plate (203) which are arranged in parallel, and the lower movable plate (201) is fixedly connected to the bottom plate (101) via a compression spring (5).

4. The universal tooth-retracting fixture according to claim 3, characterized in that: There are two second connecting plates (203), which are arranged in parallel and are both located below the first notch (3); It also includes a fixing member (10) and a pressing plate (11), wherein two ends of the fixing member (10) are respectively fixed on two second connecting plates (203), and the two ends of the fixing member (10) are respectively fixedly connected to the pressing plate (11) via adjusting bolts (12), wherein the adjusting bolts (12) are perpendicular to the second connecting plates (203), and an adjusting spring (13) is provided on the outer sleeve of the adjusting bolts (12).

5. The universal tooth-retracting fixture according to claim 4, characterized in that: The second connecting plate (203) is provided with a plurality of bolt holes distributed vertically; the fixing member (10) is in the shape of a cross as a whole, and bolt holes corresponding to the bolt holes on the second connecting plate (203) are provided at both left and right ends of the fixing member (10); a rearward protrusion in the middle is clamped between the two second connecting plates (203); and a contact groove (14) is provided on a side of the forward protrusion in the middle close to the pressure plate (11).

6. The universal tooth-retracting fixture according to claim 3, characterized in that: It also includes a first guide column (15) and a second guide column (16), wherein the first guide column (15) passes through the lower movable plate (201) and the upper movable plate (202), and its two ends are respectively fixedly connected to the bottom plate (101) and the top plate (102); the lower end of the second guide column (16) is fixed to the upper surface of the upper movable plate (202), and the upper end passes through the top plate (102) and is suspended in the air; It also includes a first guide sleeve (17) fixed on the upper surface of the lower movable plate (201) and a second guide sleeve (18) fixed on the lower surface of the upper movable plate (202), and the first guide sleeve (17), the second guide sleeve (18) and the compression spring (5) are all sleeved outside the first guide column (15).

7. The universal tooth-retracting fixture according to claim 4 or 5, characterized in that: It also includes a first guide column (15) and a second guide column (16), wherein the first guide column (15) passes through the lower movable plate (201) and the upper movable plate (202), and its two ends are respectively fixedly connected to the bottom plate (101) and the top plate (102); the lower end of the second guide column (16) is fixed to the upper surface of the upper movable plate (202), and the upper end passes through the top plate (102) and is suspended in the air; It also includes a first guide sleeve (17) fixed on the upper surface of the lower movable plate (201) and a second guide sleeve (18) fixed on the lower surface of the upper movable plate (202), and the first guide sleeve (17), the second guide sleeve (18) and the compression spring (5) are all sleeved outside the first guide column (15).

8. The universal tooth-retracting fixture according to claim 4, 5 or 6, characterized in that: A limiting member (19) is also provided on the lower surface of the lower movable plate (201).

9. The universal tooth-removing fixture according to claim 4, 5 or 6, characterized in that: The first connecting plate (103) and the second connecting plate (203) are arranged in parallel, there are two first connecting plates (103), and the second connecting plate (203) is located between the two first connecting plates (103); each first connecting plate (103) is provided with a second through slot (8), and both ends of the upper movable plate (202) and the lower movable plate (201) pass through the second through slot (8).

10. The universal tooth-retracting fixture according to claim 4, 5 or 6, characterized in that: A fixing seat (20) is also provided at the middle edge of the lower movable plate (201), and a height adjustment device (21) cooperating with the fixing member (10) is provided on the fixing seat (20).

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