Connecting structure and system for brake pipe and hanging seat

Abstract

The invention relates to the technical field of construction tools, and provides a connecting structure and system for a brake pipe and a hanging seat, which can effectively solve the problem of strong assembly of a brake pipe body and a bent hanging seat, and comprises a brake pipe body, a brake pipe elevator, a cushion block, a deformed hanging seat, a first gasket, a first nut, the bent hanging seat, a hanging plate and a bolt, the brake pipe body is sleeved with the brake pipe elevator, the cushion block is arranged on the brake pipe elevator, the brake pipe elevator is sleeved with the deformation lifting seat, the deformation lifting seat is provided with a long round hole, the brake pipe elevator is sleeved with the first gasket, the brake pipe elevator is sleeved with the first nut in a threaded mode, and the brake pipe elevator is provided with threads matched with the first nut. The bent lifting seat is arranged on the deformation lifting seat, the lifting plate is connected to the bent lifting seat, the bolt penetrates through the deformation lifting seat and the bent lifting seat, the bolt is sleeved with a second gasket, the bolt is sleeved with a second nut in a threaded mode, a middle groove is formed in the long round hole, and a sliding block is connected into the middle groove in a sliding mode.

Description

Technical Field

[0001] The invention relates to the technical field of construction tools, and in particular to a connection structure and system of a brake pipe and a hanger. Background Art

[0002] In recent years, the number of brake failures in railway freight cars has remained high, especially the cracking and leakage of the brake pipe system, which are the main failures affecting the safety of freight cars. Combined with on-site investigations and the actual use of the connection between the brake pipe and the hanger, it is shown that during on-site operations, the two docked brake pipes are often not on the same axis due to the length and shape of the pipe hanger and the main pipe, resulting in stiffness at the joint and uneven docking surfaces. Forceful assembly such as using a crowbar to pry the brake pipe causes squeezing of the sealing rubber parts, resulting in cracks in some brake pipes and leakage at the joints.

[0003] The existing brake pipe and pipe hanger connection is mainly connected through brake pipe hanging cards, nylon pipe pads, bolts and washers. However, when the assembly gap between the brake pipe and the pipe hanger seat exceeds the limit, only a small number of long-hole main pipe hangers can achieve unidirectional adjustment, and the adjustment amount is limited. The round-hole pipe hanger seat cannot achieve lateral or vertical bidirectional adjustment, resulting in the brake pipe assembly being blocked and there is a possibility of forceful assembly, causing some brake pipes to crack and leak at the connection. Summary of the invention

[0004] In view of the deficiencies of the prior art, the present invention provides a connection structure and system for a brake pipe and a hanger to solve the problem that the prior art mentioned in the background art may cause partial brake pipe breakage and leakage at the connection due to the possibility of strong assembly.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a connection structure between a brake pipe and a hanger, comprising a brake pipe body, a brake pipe hanger, a cushion block, a deformable hanger, a first washer, a first nut, a bent hanger, a hanger plate and a bolt, wherein the brake pipe hanger is sleeved on the brake pipe body, the cushion block is arranged on the brake pipe hanger, the deformable hanger is sleeved on the brake pipe hanger, and an oblong hole is provided on the deformable hanger, the first washer is sleeved on the brake pipe hanger, the first nut is threadedly sleeved on the brake pipe hanger, and a thread matching the first nut is provided on the brake pipe hanger, the bent hanger is arranged on the deformable hanger, the hanger plate is fixedly connected to the bent hanger, the bolt passes through the deformable hanger and the bent hanger, and a second washer is sleeved on the bolt, and a second nut is threadedly sleeved on the bolt.

[0006] Preferably, the oblong hole is provided with an adjustment amount of 10 mm.

[0007] Furthermore, a middle groove is provided at the oblong hole, a sliding block is slidably connected in the middle groove, a center ring is fixedly connected to the sliding block, and a moving component for driving the center ring to move is provided on the center ring.

[0008] Furthermore, the moving component includes a rotating screw, a threaded block and a linkage component. The rotating screw is rotatably connected in the middle groove, the threaded block is threadedly sleeved on the rotating screw, and the threaded block is fixedly connected to the center ring. The linkage component is arranged on the deformable hanger to drive the two center rings to move simultaneously.

[0009] Furthermore, the linkage assembly includes a linkage rod, a rotating rod and a limit rotation button. The linkage rod is rotatably connected between the two rotating screws, the threads of the two rotating screws are opposite, the rotating rod is fixedly connected to one of the rotating screws, and the rotating rod passes through the deformable hanger and extends to the outside, and the limit rotation button is fixedly connected to the rotating rod.

[0010] Preferably, on the basis of the above scheme, the limit rotating knob includes a baffle, a rotating plate, a limit spring and a limit rod, the baffle is fixedly connected to the rotating rod, the rotating plate is slidably mounted on the rotating rod, the limit spring is mounted on the rotating rod, and the limit spring is connected between the baffle and the rotating plate, the limit rod is fixedly connected to the deformable hanger, and the rotating plate is provided with a plurality of limit grooves matching the limit rod.

[0011] Further on the basis of the above solution, an anti-slip pad is fixedly connected to the cushion block.

[0012] On the basis of the above scheme, a further step is taken, wherein a plurality of positioning blocks are fixedly connected to the cushion block, a positioning groove matching the positioning block is provided on the deformable hanger, a clamping block is slidably connected to the positioning block, a clamping groove matching the clamping block is provided on the deformable hanger, a slide cylinder is fixedly connected to the positioning block, a slide rod is slidably sleeved on the slide cylinder, the slide rod is fixedly connected to the clamping block, and telescopic springs are sleeved on the slide cylinder and the slide rod, and the telescopic spring is connected between the clamping block and the positioning block.

[0013] Further on the basis of the above solution, a sliding plate is slidably connected to the deformable hanging seat, a moving groove for the sliding plate to move is provided on the deformable hanging seat, and a pressing plate is fixedly connected to the sliding plate.

[0014] A system of a connection structure between a brake pipe and a hanger, comprising the following steps:

[0015] S1. First, set the brake pipe hanging card sleeve to the appropriate position on the brake pipe body, then clamp the pad between the brake pipe hanging card and the brake pipe body, the anti-skid pad contacts the brake pipe body, install the deformed hanging seat on the pad, the positioning block enters the positioning groove, driven by the telescopic spring, the clamping block enters the clamping groove, adjust the position of the center ring by the position of the brake pipe hanging card, slide the rotating plate in the direction of the baffle, the rotating plate is separated from the limiting rod, and then the rotating plate can be rotated to drive the rotating rod to rotate, the rotating rod rotates to drive the rotating screw located on one side to rotate, the rotating screw rotates to drive the linkage rod to rotate, the linkage rod rotates to drive another rotating screw to rotate, the rotating screw rotates to drive the threaded block to move, the threaded block drives the center ring to slide to the appropriate position, release the rotating plate, and driven by the limiting spring, the limiting rod enters the limiting groove on the rotating plate;

[0016] S2, sleeve the first washer onto the brake pipe elevator, and then threadably sleeve the first nut onto the brake pipe elevator, so that the brake pipe elevator fits tightly against the first washer;

[0017] S3, align the bending hanger with the deforming hanger, make the bolt pass through the bending hanger and the deforming hanger, put the second washer on the bolt, and then put the second nut on the bolt through the thread to fix it.

[0018] In summary, the present invention includes at least one of the following beneficial technical effects:

[0019] The connection system of the brake pipe and the hanger realizes two-way adjustment between the deformable hanger and the hanger plate, the deformable hanger and the cushion block and the brake pipe hanger by adding a deformable hanger and utilizing the oblong hole on the deformable hanger, thereby realizing two-way adjustment of the gap between the pipe hanger and the pipe hanger. When the assembly gap between a part of the brake pipe body and the bent hanger exceeds the limit, the deformable hanger is added to realize two-way adjustment at the same time. Therefore, the connection system of the brake pipe and the hanger can effectively solve the problem of strong assembly of the brake pipe body and the bent hanger. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 It is a schematic diagram of the structure of the brake pipe elevator, the cushion block and the first washer etc. of the present invention;

[0022] Figure 3 It is a schematic diagram of the structure of the cushion block, the first washer and the first nut of the present invention;

[0023] Figure 4 It is a schematic diagram of the structure of the bending hanger, the hanger plate and the bolts etc. of the present invention;

[0024] Figure 5It is a schematic diagram of the structure of the bolt, the second washer and the second nut of the present invention;

[0025] Figure 6 It is a schematic diagram of the structure of the cushion block, the deformable hanger and the oblong hole of the present invention;

[0026] Figure 7 It is a schematic diagram of the structure of the deformation hanger, the oblong hole and the center ring of the present invention;

[0027] Figure 8 It is a partial cross-sectional structural diagram of the cooperation of the deformable hanger, the center ring and the linkage rod of the present invention;

[0028] Fig. 9 For the present invention Figure 8 A schematic diagram of the local enlarged structure at point A in the middle;

[0029] Fig.10 It is a schematic diagram of the structure of the sliding block, the center ring and the rotating screw rod of the present invention;

[0030] Fig.11 It is a schematic diagram of the structure of the cooperation of the rotating rod, the baffle plate and the rotating plate of the present invention;

[0031] Fig.12 It is a schematic diagram of the structure of a partial cross section of the deformation hanger, the positioning block and the clamping block of the present invention;

[0032] Fig.13 This is a schematic diagram of the structure of the positioning block, the clamping block and the sliding plate of the present invention;

[0033] Fig.14 It is a schematic diagram of a partial cross-section of the structure of the positioning block, the clamping block and the telescopic spring of the present invention;

[0034] Fig.15 It is a schematic diagram of the exploded structure of the cooperation among the clamping block, the sliding cylinder and the sliding rod etc. of the present invention.

[0035] In the figure: 1. brake pipe body; 2. brake pipe hanging card; 3. cushion block; 4. deformable hanging seat; 5. oblong hole; 6. first washer; 7. first nut; 8. bent hanging seat; 9. hanging plate; 10. bolt; 11. second washer; 12. second nut; 13. sliding block; 14. center ring; 15. rotating screw; 16. threaded block; 17. linkage rod; 18. rotating rod; 19. baffle; 20. rotating plate; 21. limit spring; 22. limit rod; 23. anti-skid pad; 24. positioning block; 25. clamping block; 26. slide cylinder; 27. slide rod; 28. telescopic spring; 29. ​​sliding plate; 30. pressing plate. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0038] Example 1

[0039] Reference Figures 1 to 15 A connection structure between a brake pipe and a hanger, comprising a brake pipe body 1, a brake pipe elevator 2, a cushion block 3, a deformable hanger 4, a first washer 6, a first nut 7, a bent hanger 8, a hanger plate 9 and a bolt 10, the brake pipe elevator 2 is sleeved on the brake pipe body 1, the cushion block 3 is arranged on the brake pipe elevator 2, the deformable hanger 4 is sleeved on the brake pipe elevator 2, and an oblong hole 5 is opened on the deformable hanger 4, the first washer 6 is sleeved on the brake pipe elevator 2, the first nut 7 is threadedly sleeved on the brake pipe elevator 2, the brake pipe elevator 2 is provided with a thread matching the first nut 7, the bent hanger 8 is arranged on the deformable hanger 4, and the hanger The plate 9 is fixedly connected to the bending hanger 8, and the bolt 10 passes through the deformable hanger 4 and the bending hanger 8, and a second washer 11 is sleeved on the bolt 10, and a second nut 12 is threadedly sleeved on the bolt 10. By adding the deformable hanger 4 and utilizing the oblong hole 5 on the deformable hanger 4, bidirectional adjustment between the deformable hanger 4 and the hanging plate 9, the deformable hanger 4 and the cushion block 3 and the brake pipe hanger 2 can be achieved, thereby achieving bidirectional adjustment of the gap between the pipe hanger and the pipe hanger. When the assembly gap between part of the brake pipe body and the bending hanger exceeds the limit, the deformable hanger is added and bidirectional adjustment is achieved at the same time, which can effectively solve the problem of strong assembly of the brake pipe body and the bending hanger.

[0040] Reference Figures 1 to 15, an adjustment amount of 10mm is set at the oblong hole 5. Considering the different assembly positions of the brake pipe hanger 2 relative to the oblong hole 5, it is convenient to check the assembly quality of the brake pipe body and the bent hanger. The deformed hanger is divided into left and right parts. It is required that the threaded part of the brake pipe hanger 2 must face the outside of the vehicle body (except towards the center beam) after assembly. In order to increase the adjustment amount, the oblong hole 5 of the designed pipe hanger has an adjustment amount of 10mm, which further eliminates the strong assembly caused by the large assembly gap between the brake pipe and the hanger. An intermediate groove is provided at the oblong hole 5, and a sliding block 13 is slidably connected in the intermediate groove. A center ring 14 is fixedly connected to the sliding block 13. The center ring 14 can provide an adjustment space and avoid the brake pipe hanger 2 from being adjusted. The position of the center ring 14 in the section space is moved, and a moving component for driving the center ring 14 to move is arranged on the center ring 14, and the moving component includes a rotating screw 15, a threaded block 16 and a linkage component. The rotating screw 15 is rotatably connected in the middle groove, and the threaded block 16 is threadedly sleeved on the rotating screw 15, and the threaded block 16 is fixedly connected to the center ring 14. The linkage component is arranged on the deformation hanger 4, and is used to drive the two center rings 14 to move at the same time. The linkage component includes a linkage rod 17, a rotating rod 18 and a limit rotation button. The linkage rod 17 is rotatably connected between the two rotating screws 15, and the threads of the two rotating screws 15 are opposite. The rotating rod 18 is fixedly connected to one of the rotating screws 15, and the rotating rod 18 penetrates The deformation hanger 4 extends to the outside, and the limit rotation knob is fixedly connected to the rotating rod 18. The limit rotation knob is rotated to drive the rotating rod 18 to rotate. The rotating rod 18 rotates to drive the rotating screw 15 located on one side thereof to rotate. The rotating screw 15 rotates to drive the linkage rod 17 to rotate. The linkage rod 17 rotates to drive another rotating screw 15 to rotate. The rotating screw 15 rotates to drive the threaded block 16 to move. The threaded block 16 drives the center ring 14 to slide, so that the position of the center ring 14 can be adjusted according to the position of the brake pipe elevator 2. The limit rotation knob includes a baffle 19, a rotating plate 20, a limit spring 21 and a limit rod 22. The baffle 19 is fixedly connected to the rotating rod 18 The rotating plate 20 is slidably sleeved on the rotating rod 18, and the limit spring 21 is sleeved on the rotating rod 18, and the limit spring 21 is connected between the baffle 19 and the rotating plate 20, and the limit rod 22 is fixedly connected to the deformable hanger 4. A plurality of limit grooves matching the limit rod 22 are opened on the rotating plate 20. The rotating plate 20 is slid toward the direction of the baffle 19, and the rotating plate 20 is disengaged from the limit rod 22. Then, the rotating plate 20 is rotated to drive the rotating rod 18 to rotate. When the rotating plate 20 is released, due to the drive of the limit spring 21, the limit rod 22 enters the limit groove on the rotating plate 20. At this time, the rotating plate 20 cannot be rotated, which is convenient for preventing the rotating plate 20 from rotating due to external force.

[0041] Reference Figures 1 to 15The pad 3 is fixedly connected with an anti-skid pad 23 to prevent slipping between the pad 3 and the brake pipe body 1. The pad 3 is fixedly connected with a plurality of positioning blocks 24. The deformable hanger 4 is provided with a positioning groove matching the positioning block 24. The positioning block 24 is slidably connected with a card block 25. The deformable hanger 4 is provided with a card slot matching the card block 25. The positioning block 24 is fixedly connected with a slide cylinder 26. The slide cylinder 26 is slidably sleeved with a slide rod 27. The slide rod 27 is fixedly connected to the card block 25, and the slide cylinder 26 and the slide rod 27 are sleeved with a telescopic spring 28. The telescopic spring 28 is connected between the card block 25 and the positioning block 24, so as to facilitate the connection of the deformable hanger plate 9 to the pad 3. The deformable hanger 4 is slidably connected with a sliding plate 29. The deformable hanger 4 is provided with a moving groove for the sliding plate 29 to move, and a pressing plate 30 is fixedly connected to the sliding plate 29, so as to facilitate the separation of the deformable hanger plate 9 and the pad 3.

[0042] Example 2

[0043] In summary, when using the connection structure of the brake pipe and the hanger, first the brake pipe elevator 2 is sleeved on the appropriate position on the brake pipe body 1, and then the cushion block 3 is clamped between the brake pipe elevator 2 and the brake pipe body 1, the anti-skid pad 23 contacts the brake pipe body 1, the deformable hanger 4 is installed on the cushion block 3, the positioning block 24 enters the positioning groove, driven by the telescopic spring 28, the clamping block 25 enters the clamping groove, the position of the center ring 14 is adjusted by the position of the brake pipe elevator 2, the rotating plate 20 is slid in the direction of the baffle 19, the rotating plate 20 is disengaged from the limiting rod 22, and then the rotating plate 20 is rotated to drive the rotating rod 18 to rotate, the rotating rod 18 rotates to drive the rotating screw 15 located on one side thereof to rotate, and the rotating screw 15 rotates to drive the connecting rod 18 to rotate. The movable rod 17 rotates, and the linkage rod 17 rotates to drive another rotating screw rod 15 to rotate. The rotating screw rod 15 rotates to drive the threaded block 16 to move. The threaded block 16 drives the center ring 14 to slide to a suitable position, and the rotating plate 20 is released. Due to the drive of the limit spring 21, the limit rod 22 enters the limit groove on the rotating plate 20, and the first washer 6 is sleeved on the brake pipe elevator 2, and then the first nut 7 is threadedly sleeved on the brake pipe elevator 2, so that the brake pipe elevator 2 fits tightly with the first washer 6, and then the bent hanger 8 is aligned with the deformed hanger 4, so that the bolt 10 passes through the bent hanger 8 and the deformed hanger 4, and the second washer 11 is sleeved on the bolt 10, and then the second nut 12 is threadedly sleeved on the bolt 10 to fix it.

[0044] The above-mentioned embodiments only express the specific implementation of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A connection structure between a brake pipe and a hanger, comprising a brake pipe body (1), characterized in that: Also includes: A brake pipe elevator (2), wherein the brake pipe elevator (2) is sleeved on the brake pipe body (1); A cushion block (3), the cushion block (3) being arranged on the brake pipe hanging card (2); A deformable hanger (4), the deformable hanger (4) being sleeved on the brake pipe hanger (2), and the deformable hanger (4) being provided with an oblong hole (5); A first washer (6), the first washer (6) being sleeved on the brake pipe hanging card (2); a first nut (7), the first nut (7) being threadably sleeved on the brake pipe elevator (2), the brake pipe elevator (2) being provided with a thread matching the first nut (7); A bending hanger (8), wherein the bending hanger (8) is arranged on the deformable hanger (4); A hanging plate (9), the hanging plate (9) being fixedly connected to the bent hanging seat (8); A bolt (10), the bolt (10) passing through the deformable hanger (4) and the bent hanger (8), a second washer (11) being sleeved on the bolt (10), and a second nut (12) being threadedly sleeved on the bolt (10).

2. The connection structure between a brake pipe and a hanger according to claim 1, characterized in that: The oblong hole (5) is provided with an adjustment amount of 10 mm.

3. The connection structure between a brake pipe and a hanger according to claim 2, characterized in that: The oblong hole (5) is provided with a middle groove, a sliding block (13) is slidably connected in the middle groove, a center ring (14) is fixedly connected to the sliding block (13), and a moving component for driving the center ring (14) to move is provided on the center ring (14).

4. The connection structure between a brake pipe and a hanger according to claim 3, characterized in that: The mobile assembly comprises: A rotating screw rod (15), wherein the rotating screw rod (15) is rotatably connected in the middle groove; a threaded block (16), the threaded block (16) being threadably sleeved on the rotating screw (15), and the threaded block (16) being fixedly connected to the center ring (14); A linkage assembly, the linkage assembly being arranged on the deformable suspension seat (4) and being used for driving the two center rings (14) to move simultaneously.

5. The connection structure between a brake pipe and a hanger according to claim 4, characterized in that: The linkage components include: A linkage rod (17), the linkage rod (17) being rotatably connected between the two rotating screw rods (15), the threads of the two rotating screw rods (15) being opposite to each other; A rotating rod (18), the rotating rod (18) being fixedly connected to one of the rotating screw rods (15), and the rotating rod (18) passing through the deformable hanging seat (4) and extending to the outside; A limit rotation knob, the limit rotation knob being fixedly connected to the rotating rod (18).

6. The connection structure between a brake pipe and a hanger according to claim 5, characterized in that: The limit rotation knob comprises: a baffle (19), the baffle (19) being fixedly connected to the rotating rod (18); a rotating plate (20), the rotating plate (20) being slidably sleeved on the rotating rod (18); a limit spring (21), the limit spring (21) being sleeved on the rotating rod (18), and the limit spring (21) being connected between the baffle plate (19) and the rotating plate (20); A limiting rod (22), wherein the limiting rod (22) is fixedly connected to the deformable hanger (4), and the rotating plate (20) is provided with a plurality of limiting grooves matching the limiting rod (22).

7. The connection structure between a brake pipe and a hanger according to claim 6, characterized in that: An anti-slip pad (23) is fixedly connected to the cushion block (3).

8. The connection structure between a brake pipe and a hanger according to claim 7, characterized in that: A plurality of positioning blocks (24) are fixedly connected to the cushion block (3); a positioning groove matching the positioning blocks (24) is formed on the deformable hanger (4); a clamping block (25) is slidably connected to the positioning block (24); a clamping groove matching the clamping block (25) is formed on the deformable hanger (4); a slide cylinder (26) is fixedly connected to the positioning block (24); a slide rod (27) is slidably sleeved on the slide cylinder (26); the slide rod (27) is fixedly connected to the clamping block (25); and a telescopic spring (28) is sleeved on the slide cylinder (26) and the slide rod (27); the telescopic spring (28) is connected between the clamping block (25) and the positioning block (24).

9. The connection structure between a brake pipe and a hanger according to claim 8, characterized in that: A sliding plate (29) is slidably connected to the deformable hanging seat (4), a moving groove for the sliding plate (29) to move is provided on the deformable hanging seat (4), and a pressing plate (30) is fixedly connected to the sliding plate (29).

10. A system of a connection structure between a brake pipe and a hanger, characterized in that: The connection structure between a brake pipe and a hanger as claimed in claim 9 comprises the following steps: S1. First, the brake pipe hanging card (2) is sleeved on a suitable position on the brake pipe body (1), and then the pad (3) is clamped between the brake pipe hanging card (2) and the brake pipe body (1), the anti-skid pad (23) contacts the brake pipe body (1), the deformable hanging seat (4) is installed on the pad (3), the positioning block (24) enters the positioning groove, and due to the drive of the telescopic spring (28), the clamping block (25) enters the clamping groove, the position of the center ring (14) is adjusted by the position of the brake pipe hanging card (2), and the rotating plate (20) is slid toward the direction of the baffle (19), and the rotating plate (20) is separated from the limit rod (22), and then The rotating plate (20) can be rotated to drive the rotating rod (18) to rotate. The rotating rod (18) drives the rotating screw (15) located on one side thereof to rotate. The rotating screw (15) drives the linkage rod (17) to rotate. The linkage rod (17) drives another rotating screw (15) to rotate. The rotating screw (15) drives the threaded block (16) to move. The threaded block (16) drives the center ring (14) to slide to a suitable position. The rotating plate (20) is released. Due to the driving of the limit spring (21), the limit rod (22) enters the limit groove on the rotating plate (20). S2, sleeve the first washer (6) onto the brake pipe elevator (2), and then threadably sleeve the first nut (7) onto the brake pipe elevator (2), so that the brake pipe elevator (2) fits tightly against the first washer (6); S3, align the bending hanger (8) with the deforming hanger (4), make the bolt (10) pass through the bending hanger (8) and the deforming hanger (4), put the second washer (11) on the bolt (10), and screw the second nut (12) on the bolt (10) to fix it.

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