Anti-aging rubber sealing gasket detection device

Abstract

The invention relates to the technical field of detection equipment, in particular to an anti-aging rubber sealing gasket detection device which comprises a supporting frame, supporting legs are fixedly installed on the left side and the right side of the lower end face of the supporting frame, a motor is fixedly installed in the middle of the lower end face of the supporting frame, and a sleeve is arranged on the left side of the motor and fixedly connected with the supporting frame. A threaded rod is arranged on the right side of the motor and rotationally connected with the supporting frame, a transmission mechanism is arranged on the lower side of the motor, and a suction mechanism is arranged in the sleeve. According to the device, the transmission mechanism is arranged, the output shaft of the motor carries the first incomplete gear and the second incomplete gear to rotate, and the characteristic that teeth of the incomplete gears are lacked is utilized, so that the detection mechanism and the suction mechanism can be intermittently in transmission connection, and the detection mechanism firstly works to clamp a sealing gasket; and then the suction mechanism is driven, and the sealing performance of the sealing gasket is detected, so that the practicability of the equipment is realized.

Description

Technical Field

[0001] The invention relates to the technical field of detection equipment, in particular to an anti-aging rubber sealing pad detection device. Background Art

[0002] Sealing gaskets are used as sealing parts for machinery, equipment, and pipelines as long as there is fluid. They are used inside and outside to seal. Sealing gaskets are made of metal or non-metallic plate materials through cutting, stamping or cutting processes. They are used for sealing connections between pipelines and between parts of machinery and equipment.

[0003] In the process of testing the sealing performance of the sealing gasket, the existing rubber sealing gasket testing device may affect the testing accuracy of the sealing performance of the sealing gasket due to the insufficient sealing performance between the pressing component and the testing platform.

[0004] The Chinese patent with the publication number CN217953777U discloses an anti-aging rubber sealing gasket detection device, in which, after the pressing platform presses the sealing gasket to be detected inside the storage groove at the lower end of the detection groove, the sealing performance of the sealing gasket to be detected can be quickly detected through the air chamber inside the pressing platform, and the first sealing gasket installed inside the concave groove in the detection groove and the second sealing gasket installed at the lower end of the pressing platform can also maintain the sealing between the pressing platform and the detection groove when the sealing gasket to be detected is detected, thereby improving the detection accuracy of the sealing gasket to be detected;

[0005] Although this anti-aging rubber sealing gasket detection device can improve the detection accuracy of the sealing gasket to be detected, in actual use, a gas detection method is still used. The gas detection method can only be reflected by using a professional gas detection mechanism. The detection structure and effect are not intuitive, and the detection personnel cannot observe directly. If the gas detection mechanism is damaged and the detection result is wrong, the detection personnel cannot discover it in time, thereby causing unnecessary trouble.

[0006] Therefore, an anti-aging rubber sealing gasket detection device is proposed. Summary of the invention

[0007] The invention relates to the technical field of detection equipment and aims to solve the shortcomings in the prior art and proposes an anti-aging rubber sealing pad detection device.

[0008] In order to achieve the above object, the present invention adopts the following technical solutions:

[0009] The cam is provided with a toothed support frame, and the toothed support frame is provided with a toothed support frame, and the toothed support frame is provided with a toothed support frame. The toothed support frame is provided with a toothed support frame, and the toothed support frame is provided with a toothed support frame. The toothed support frame is provided with a toothed support frame, and the toothed support frame is provided with a toothed support frame. The toothed support frame is provided with a toothed support frame. The toothed support frame is provided with a toothed support frame. The toothed support frame is provided with a toothed support frame. The toothed support frame is provided with a toothed support frame. The toothed support frame is provided with a toothed support frame. The toothed support frame is provided with a toothed support frame. The toothed support frame is provided with a toothed support frame.

[0010] Furthermore, the suction sleeve includes a transmission column arranged on the lower side of the sleeve, and the rotating shaft passes through the sleeve and extends to the inside of the sleeve to be fixedly connected to the transmission column.

[0011] Furthermore, the outer surface of the transmission column is provided with a transmission groove in an annular shape, a sliding rod is slidably connected inside the transmission groove, a push rod is fixedly installed on the left end of the sliding rod, and a sliding sleeve is fixedly installed on the inner wall of the sleeve.

[0012] Furthermore, a piston plate is slidably connected to the inner upper side of the sleeve, the push rod is slidably connected to the sleeve, the upper end of the push rod is fixedly connected to the piston plate, the rear side of the upper end surface of the sleeve is connected to an input pipe, and the front side of the upper end surface of the sleeve is connected to an output pipe.

[0013] Furthermore, the detection mechanism includes a threaded sleeve connected to the upper side of the outer surface of the threaded rod by a spiral transmission, a connecting rod is fixedly installed on the front end of the outer surface of the threaded sleeve, and a socket sleeve is fixedly installed on the front end of the connecting rod.

[0014] Furthermore, the bell-and-spigot sleeve is connected to the output pipe, a disc 1 is fixedly installed inside the bell-and-spigot sleeve, and a bell-and-spigot rod is fixedly installed in the middle of the lower end surface of the disc 1.

[0015] Furthermore, a threaded sleeve 2 is spirally connected to the lower side of the outer surface of the threaded rod, a connecting rod 2 is fixedly installed on the front end of the outer surface of the threaded sleeve 2, and a socket sleeve 2 is fixedly installed on the front end of the connecting rod 2.

[0016] Furthermore, a disc 2 is fixedly installed inside the socket sleeve 2, a socket slot is provided on the upper end surface of the disc 2 corresponding to the socket rod, and through holes are provided at the outer edges of the upper end surfaces of the disc 1 and the disc 2.

[0017] Furthermore, a slide rail is provided on the front side of the threaded rod, and the first connecting rod and the second connecting rod are both slidably connected inside the slide rail.

[0018] Beneficial effects of the present invention:

[0019] 1. The present application sets up a detection mechanism, firstly puts the sealing end into the upper end of the disc 2 inside the socket sleeve 2, then starts the motor, so that the output shaft of the motor carries the incomplete gear 1 and the incomplete gear 2 to rotate. At this time, the incomplete gear 1 and the transmission gear 1 on the rotating shaft are in a state of non-engagement transmission, and do not transmit the pumping mechanism, while the incomplete gear 2 is in a state of meshing transmission with the gear 2 on the threaded rod. At this time, the rotation of the incomplete gear 2 will drive the threaded rod to rotate, and the threaded rod is a bidirectional threaded rod. Therefore, when the threaded rod rotates, the threaded sleeve 1 connected to the upper end of the outer surface of the threaded rod through the connecting rod 1 will carry the socket sleeve 1 downward to move, and the threaded sleeve 2 connected to the spiral transmission on the lower side of the outer surface of the threaded rod will carry the socket sleeve 2 upward to move through the connecting rod 2 until the socket sleeve 1 is inserted into the interior of the socket sleeve 2, and the socket rod fixedly installed inside the socket sleeve 1 is inserted into the socket slot set inside the socket sleeve 2, so that the disc 1 and the disc 2 tightly squeeze the sealing gasket on the disc 2 to ensure the tightness of the sealing gasket.

[0020] 2. The present application can add pigment to the used water by setting up a suction mechanism. When the incomplete gear 2 rotates to the stage without teeth, the transmission state to the detection mechanism is disconnected, and the incomplete gear 1 rotates to the state of meshing transmission with the transmission gear 1 on the rotating shaft. At this time, the rotating shaft will carry the transmission column to rotate. The rotation of the transmission column will cause the sliding rod slidably connected inside the transmission groove to displace through the transmission groove opened on the outer surface. The displacement of the sliding rod will push the push rod to reciprocate inside the sliding sleeve. One end of the push rod is fixedly connected to the piston plate, which then causes the piston plate to reciprocate inside the sleeve. When the piston plate moves downward, it will open The one-way input valve inside the input pipe introduces external water into the interior of the sleeve through the input pipe. When the piston plate moves upward, the one-way output valve in the output pipe will be opened, so that the water in the sleeve will be discharged into the interior of the socket sleeve one through the output pipe, and flow out from the through hole on the disc one. The sealing performance of the sealing gasket is tested. When the sealing performance of the sealing gasket is good, the water will not flow out of the socket sleeve two from the through hole opened on the disc two. If the sealing performance is poor, the water will flow out through the gap of the sealing gasket and flow out of the socket sleeve from the through hole on the disc two. Since the water is colored, it can be ensured that the observer can observe the flow of the liquid.

[0021] 3. In this application, the sealing performance of the rubber gasket is tested by the flow of liquid, and pigment is added to the water to facilitate the observation of the liquid, thereby ensuring the accuracy of the sealing test.

[0022] 4. The present application sets up a transmission mechanism, utilizes the output shaft of the motor to carry the incomplete gear 1 and the incomplete gear 2 to rotate, and utilizes the characteristics of the missing teeth of the incomplete gears to intermittently transmit and connect the detection mechanism and the suction mechanism, so that the detection mechanism first operates to clamp the sealing gasket, and then transmits the suction mechanism and detects the sealing performance of the sealing gasket, thereby realizing the practicality of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 For the present invention Figure 1 A schematic diagram of the structure enlargement at point A;

[0025] Figure 3 is a cross-sectional view of the suction mechanism of the present invention;

[0026] Figure 4 For the present invention Figure 3 A schematic diagram of the structure at B in FIG.

[0027] Figure 5 It is a bottom view of the overall structure of the present invention;

[0028] Figure 6 For the present invention Figure 5 A schematic diagram of the structure at position C in FIG.

[0029] Figure 7 It is a cross-sectional view of the overall structure of the present invention;

[0030] Figure 8 For the present invention Figure 7 A schematic diagram of the structure at D in FIG.

[0031] Fig. 9 For the present invention Figure 7 Schematic diagram of the enlarged structure at E in FIG.

[0032] In the figure: 1. support frame; 2. support leg; 3. motor; 4. output shaft; 5. sleeve; 6. rotating shaft; 7. transmission gear 1; 8. threaded rod; 9. transmission gear 2; 10. incomplete gear 1; 11. incomplete gear 2; 12. transmission column; 13. transmission groove; 14. slide rod; 15. push rod; 16. sliding sleeve; 17. piston plate; 18. input pipe; 19. output pipe; 20. threaded sleeve 1; 21. connecting rod 1; 22. socket sleeve 1; 23. disc 1; 24. socket rod; 25. slide rail; 26. threaded sleeve 2; 27. connecting rod 2; 28. socket sleeve 2; 29. ​​disc 2; 30. socket slot; 31. through hole. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The embodiments described below are only part of the embodiments of the present invention, rather than all the embodiments.

[0034] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0035] Reference Figure 1-9 , an anti-aging rubber sealing gasket detection device comprises a support frame 1, support legs 2 are fixedly installed on the left and right sides of the lower end surface of the support frame 1, a motor 3 is fixedly installed in the middle of the lower end surface of the support frame 1, a sleeve 5 is arranged on the left side of the motor 3, the sleeve 5 is fixedly connected to the support frame 1, a threaded rod 8 is arranged on the right side of the motor 3, the threaded rod 8 is rotatably connected to the support frame 1, a transmission mechanism is arranged on the lower side of the motor 3, a suction mechanism is arranged inside the sleeve 5, a detection mechanism is arranged on the front side of the threaded rod 8, the transmission mechanism comprises an output shaft 4 arranged at the lower end of the motor 3, an incomplete gear 10 and an incomplete gear 2 11 are arranged on the outer surface of the output shaft 4, the incomplete gear 10 is arranged on the upper side of the incomplete gear 2 11, a transmission gear 2 9 is fixedly installed in the middle of the outer surface of the threaded rod 8, the transmission gear 2 9 and the incomplete gear 2 11 are meshed with each other, a rotating shaft 6 is rotatably connected to the lower end surface of the sleeve 5, a transmission gear 1 7 is fixedly installed on the outer surface of the rotating shaft 6, and the transmission gear 1 7 and the incomplete gear 10 are meshed with each other.

[0036] Specifically, the present application sets up a transmission mechanism, utilizes the output shaft 4 of the motor 3 to carry the incomplete gear 10 and the incomplete gear 2 11 to rotate, and utilizes the characteristics of the missing teeth of the incomplete gears to intermittently transmit and connect the detection mechanism and the suction mechanism, so that the detection mechanism first operates to clamp the sealing gasket, and then transmits the suction mechanism and detects the sealing performance of the sealing gasket, thereby realizing the practicality of the equipment.

[0037] like Figure 4 As shown, the suction sleeve 5 includes a transmission column 12 arranged on the lower side of the sleeve 5, the rotating shaft 6 passes through the sleeve 5 and extends to the inside of the sleeve 5 and is fixedly connected to the transmission column 12, the outer surface of the transmission column 12 is annularly provided with a transmission groove 13, the inside of the transmission groove 13 is slidably connected with a slide rod 14, the left end of the slide rod 14 is fixedly installed with a push rod 15, the inner wall of the sleeve 5 is fixedly installed with a sliding sleeve 16, the inner upper side of the sleeve 5 is slidably connected with a piston plate 17, the push rod 15 is slidably connected to the sliding sleeve 16, the upper end of the push rod 15 is fixedly connected to the piston plate 17, the rear side of the upper end surface of the sleeve 5 is connected with an input pipe 18, and the front side of the upper end surface of the sleeve 5 is connected with an output pipe 19.

[0038] Specifically, pigment can be added to the water used. When the incomplete gear 2 11 rotates to the stage without teeth, the transmission state of the detection mechanism is disconnected, and the incomplete gear 1 rotates to the state of meshing transmission with the transmission gear 1 7 on the rotating shaft 6. At this time, the rotating shaft 6 will carry the transmission column 12 to rotate. The rotation of the transmission column 12 causes the sliding rod 14 slidably connected inside the transmission groove 13 to be displaced through the transmission groove 13 opened on the outer surface. The displacement of the sliding rod 14 will push the push rod 15 to reciprocate inside the sliding sleeve 16. One end of the push rod 15 is fixedly connected to the piston plate 17, which then causes the piston plate 17 to reciprocate inside the sleeve 5. When the piston plate 17 moves downward, the input pipe 1 is opened. 8, thereby introducing external water into the interior of the sleeve 5 through the input pipe 18. When the piston plate 17 moves upward, the one-way output valve in the output pipe 19 will be opened, thereby discharging the water in the sleeve 5 into the interior of the socket sleeve 5 through the output pipe 19, and flowing out from the through hole 31 on the disc 1 23. The sealing performance of the sealing gasket is tested. When the sealing performance of the sealing gasket is good, the water will not flow out of the socket sleeve 5 from the through hole 31 opened on the disc 29. If the sealing performance is poor, the water will flow out through the gap of the sealing gasket and flow out of the socket sleeve 5 from the through hole 31 on the disc 29. Since the water is colored, it can be ensured that the observer can observe the flow of the liquid.

[0039] like Figure 8 As shown in FIG. 9, the detection mechanism includes a threaded sleeve 20 connected to the upper side of the outer surface of the threaded rod 8 by spiral transmission, a connecting rod 21 is fixedly installed on the front end of the outer surface of the threaded sleeve 20, a socket sleeve 22 is fixedly installed on the front end of the connecting rod 21, the socket sleeve 5 is connected to the output pipe 19, a disc 23 is fixedly installed inside the socket sleeve 5, a socket rod 24 is fixedly installed in the middle of the lower end surface of the disc 23, and the threaded sleeve 22 connected to the lower side of the outer surface of the threaded rod 8 by spiral transmission is fixedly installed on the front end of the connecting rod 21. 6. A connecting rod 27 is fixedly installed on the front end of the outer surface of the threaded sleeve 26, a socket sleeve 28 is fixedly installed on the front end of the connecting rod 27, a disc 29 is fixedly installed inside the socket sleeve 28, a socket slot 30 is provided on the upper end surface of the disc 29 corresponding to the socket rod 24, through holes 31 are provided at the outer edges of the upper end surfaces of the discs 1 23 and 29, a slide rail 25 is provided on the front side of the threaded rod 8, and the connecting rods 1 21 and 27 are both slidably connected inside the slide rail 25.

[0040] Specifically, first put the sealing end into the upper end of the second internal disk 29 of the socket sleeve 5, then start the motor 3, so that the output shaft 4 of the motor 3 carries the incomplete gear 10 and the incomplete gear 2 11 to rotate. At this time, the incomplete gear 10 and the transmission gear 1 7 on the rotating shaft 6 are in a state of non-meshing transmission, and the pumping mechanism is not transmitted, while the incomplete gear 2 is in a state of meshing transmission with the gear 2 on the threaded rod 8. At this time, the rotation of the incomplete gear 2 will drive the threaded rod 8 to rotate, and the threaded rod 8 is a bidirectional threaded rod 8, so when the threaded rod 8 rotates, The threaded sleeve 20 connected by the threaded transmission on the upper end of the outer surface of the threaded rod 8 will carry the socket sleeve 22 downward through the connecting rod 21, and the threaded sleeve 26 connected by the spiral transmission on the lower side of the outer surface of the threaded rod 8 will carry the socket sleeve 28 upward through the connecting rod 27 until the socket sleeve 51 is inserted into the interior of the socket sleeve 52, and the socket rod 24 fixedly installed inside the socket sleeve 51 is inserted into the socket slot 30 set inside the socket sleeve 52, so that the disc 1 23 and the disc 29 can tightly squeeze the sealing gasket on the disc 2 29 to ensure the tightness of the sealing gasket.

[0041] When the present invention is used, it should be explained that the input pipe 18 is connected to the external water source, and in order to facilitate observation, a visible pigment is added to the external water source, and then the sealing end is placed in the upper end of the internal disk 29 of the socket sleeve 5, and then the motor 3 is started, so that the output shaft 4 of the motor 3 carries the incomplete gear 10 and the incomplete gear 2 11 to rotate. At this time, the incomplete gear 10 and the transmission gear 1 7 on the rotating shaft 6 are in a state of non-engagement transmission, and the pumping mechanism is not transmitted, while the incomplete gear 2 is in a state of meshing transmission with the gear 2 on the threaded rod 8. At this time, the rotation of the incomplete gear 2 will drive the threaded rod 8. The rod 8 rotates, and the threaded rod 8 is a bidirectional threaded rod 8. Therefore, when the threaded rod 8 rotates, the threaded sleeve 20 connected to the upper end of the outer surface of the threaded rod 8 will carry the socket sleeve 22 downward through the connecting rod 21, and the threaded sleeve 26 connected to the lower side of the outer surface of the threaded rod 8 will carry the socket sleeve 28 upward through the connecting rod 27 until the socket sleeve 5 is inserted into the inside of the socket sleeve 5, and the socket rod 24 fixedly installed inside the socket sleeve 5 is inserted into the socket slot 30 set inside the socket sleeve 5, so that the disc 1 23 and the disc 29 are against the sealing gasket on the disc 29. The gear 11 is tightly squeezed, and the incomplete gear 2 11 rotates to the stage without teeth, disconnecting the transmission state of the detection mechanism, and the incomplete gear 1 rotates to the state of meshing transmission with the transmission gear 1 7 on the shaft 6. At this time, the shaft 6 will carry the transmission column 12 to rotate, and the rotation of the transmission column 12 will cause the sliding rod 14 slidably connected inside the transmission groove 13 to be displaced through the transmission groove 13 opened on the outer surface, and the displacement of the sliding rod 14 will push the push rod 15 to reciprocate inside the sliding sleeve 16. One end of the push rod 15 is fixedly connected to the piston plate 17, which then causes the piston plate 17 to reciprocate inside the sleeve 5. When the piston plate 17 moves downward, When the piston plate 17 moves upward, the one-way input valve inside the input pipe 18 will be opened, thereby introducing external water into the interior of the sleeve 5 through the input pipe 18. When the piston plate 17 moves upward, the one-way output valve in the output pipe 19 will be opened, thereby discharging the water in the sleeve 5 into the interior of the socket sleeve 5 through the output pipe 19, and flowing out from the through hole 31 on the disc 1 23. The sealing performance of the sealing gasket is tested. When the sealing performance of the sealing gasket is good, the water will not flow out of the socket sleeve 5 from the through hole 31 opened on the disc 29. If the sealing performance is poor, the water will flow out through the gap in the sealing gasket and flow out of the socket sleeve 5 from the through hole 31 on the disc 29.

[0042] It will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the invention, the scope of the invention being defined by the appended claims and their equivalents.

Claims

1. An anti-aging rubber sealing gasket detection device, characterized in that: The invention comprises a support frame (1), support legs (2) are fixedly mounted on the left and right sides of the lower end surface of the support frame (1), a motor (3) is fixedly mounted on the middle part of the lower end surface of the support frame (1), a sleeve (5) is arranged on the left side of the motor (3), the sleeve (5) is fixedly connected to the support frame (1), a threaded rod (8) is arranged on the right side of the motor (3), the threaded rod (8) is rotatably connected to the support frame (1), a transmission mechanism is arranged on the lower side of the motor (3), a suction mechanism is arranged inside the sleeve (5), a detection mechanism is arranged on the front side of the threaded rod (8), and the transmission mechanism comprises a motor ( An output shaft (4) is arranged at the lower end of the sleeve (5), an incomplete gear 1 (10) and an incomplete gear 2 (11) are arranged on the outer surface of the output shaft (4), the incomplete gear 1 (10) is arranged on the upper side of the incomplete gear 2 (11), a transmission gear 2 (9) is fixedly installed in the middle of the outer surface of the threaded rod (8), the transmission gear 2 (9) and the incomplete gear 2 (11) are meshed with each other, the lower end surface of the sleeve (5) is rotatably connected with a rotating shaft (6), the outer surface of the rotating shaft (6) is fixedly installed with a transmission gear 1 (7), the transmission gear 1 (7) and the incomplete gear 1 (10) are meshed with each other.

2. The anti-aging rubber sealing gasket detection device according to claim 1, characterized in that: The suction sleeve (5) comprises a transmission column (12) arranged on the lower side of the sleeve (5), and the rotating shaft (6) passes through the sleeve (5) and extends to the inside of the sleeve (5) to be fixedly connected to the transmission column (12).

3. The anti-aging rubber sealing gasket detection device according to claim 2, characterized in that: The outer surface of the transmission column (12) is provided with a transmission groove (13) in an annular shape, a slide rod (14) is slidably connected inside the transmission groove (13), a push rod (15) is fixedly installed on the left end of the slide rod (14), and a sliding sleeve (16) is fixedly installed on the inner wall of the sleeve (5).

4. The anti-aging rubber sealing gasket detection device according to claim 3, characterized in that: The inner upper side of the sleeve (5) is slidably connected to a piston plate (17), the push rod (15) is slidably connected to the sliding sleeve (16), the upper end of the push rod (15) is fixedly connected to the piston plate (17), the rear side of the upper end surface of the sleeve (5) is connected to an input pipe (18), and the front side of the upper end surface of the sleeve (5) is connected to an output pipe (19).

5. The anti-aging rubber sealing gasket detection device according to claim 4, characterized in that: The detection mechanism comprises a threaded sleeve (20) connected to the outer surface of a threaded rod (8) by a spiral transmission, a connecting rod (21) is fixedly mounted on the front end of the outer surface of the threaded sleeve (20), and a socket sleeve (22) is fixedly mounted on the front end of the connecting rod (21).

6. The anti-aging rubber sealing gasket detection device according to claim 5, characterized in that: The socket sleeve (5) and the output pipe (19) are connected to each other, a disc 1 (23) is fixedly installed inside the socket sleeve (5), and a socket rod (24) is fixedly installed in the middle of the lower end surface of the disc 1 (23).

7. The anti-aging rubber sealing gasket detection device according to claim 6, characterized in that: The lower side of the outer surface of the threaded rod (8) is connected to a threaded sleeve (26) in a spiral transmission manner, the front end of the outer surface of the threaded sleeve (26) is fixedly mounted with a connecting rod (27), and the front end of the connecting rod (27) is fixedly mounted with a socket sleeve (28).

8. The anti-aging rubber sealing gasket detection device according to claim 7, characterized in that: A second disc (29) is fixedly installed inside the second socket sleeve (28), and a socket slot (30) is provided on the upper end surface of the second disc (29) corresponding to the socket rod (24), and through holes (31) are provided at the outer edges of the upper end surfaces of the first disc (23) and the second disc (29).

9. The anti-aging rubber sealing gasket detection device according to claim 8, characterized in that: A slide rail (25) is provided on the front side of the threaded rod (8), and the first connecting rod (21) and the second connecting rod (27) are both slidably connected inside the slide rail (25).

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