A high-load, high-speed locking parking anti-slip roof

Abstract

A high-load, high-speed locking parking anti-slip roof. The present invention relates to a parking anti-slip roof. The present invention aims to solve the problems in the prior art of the vehicle being relatively light and easily derailing when passing through the anti-slip roof at high speed, and the anti-slip roof parts being subject to significant wear when using the anti-slip roof. The present invention comprises a housing, stud bolts, nuts, and an exhaust pipe. It also comprises a pressure valve seat, a piston rod, a pressure valve stem, a secondary speed valve plate, a secondary speed valve spring, a locking valve assembly, a return valve, a pressure maintaining plate, a sliding valve stem, a sealing cover, a pressure valve outer spring, a pressure valve inner spring, a spring seat, a pressure regulating screw, a spring washer, a locking cap, a snap ring, a cylindrical pin, a stop seat, an elastic cylindrical pin, a sliding oil cylinder, a flat key, an adjusting washer, two elastic cylindrical pins, a plurality of one-way valve pressure columns, and a plurality of one-way valve steel balls; the sealing cover is mounted on the bottom end of the sliding oil cylinder, the sliding oil cylinder and the adjusting washer are mounted in the housing, and the exhaust pipe is mounted on the housing and connected to the housing. The present invention belongs to the field of mechanical speed regulation.

Description

Technical Field

[0001] The invention relates to a parking anti-slip roof, in particular to a high-load and high-speed locking parking anti-slip roof, and belongs to the field of mechanical deceleration and speed regulation. Background Art

[0002] Railway anti-slip roofs are a crucial component of the railway's automated speed regulation system, requiring no external energy. These speed-regulating devices automatically control the flow of railway vehicles. With technological advancements, anti-slip roofs are constantly being upgraded. Existing technology, such as retarding roof speed regulation systems, can improve hump marshaling capabilities, control the speed of vehicles shunting through the hump, and implement vehicle coupling and parking brakes. However, when light vehicles pass through anti-slip roofs at high speeds, derailment accidents are more likely to occur. Furthermore, the use of anti-slip roof components can lead to significant wear. Summary of the Invention

[0003] The present invention aims to solve the problems in the prior art that a light vehicle is prone to derailment when passing through an anti-slip roof at high speed, and that the anti-slip roof parts are subject to greater wear when using the anti-slip roof, thereby providing a high-load, high-speed locking parking anti-slip roof.

[0004] The technical problem is solved by the following solution:

[0005] It includes a housing, stud bolts, nuts and an exhaust pipe, and also includes a pressure valve seat, a piston rod, a pressure valve stem, a secondary speed valve plate, a secondary speed valve spring, a locking valve assembly, a return valve, a pressure maintaining plate, a sliding valve stem, a sealing cover, a pressure valve outer spring, a pressure valve inner spring, a spring seat, a pressure regulating screw, a spring washer, a locking cap, a snap ring, a cylindrical pin, a stop seat, an elastic cylindrical pin, a sliding oil cylinder, a flat key, an adjusting washer, two elastic cylindrical pins, a plurality of one-way valve pressure columns and a plurality of one-way valve steel balls;

[0006] The sealing cover is installed on the bottom end of the sliding cylinder, and the piston rod is inserted into the sealing cover. The pressure valve seat, pressure valve stem, secondary speed valve plate, secondary speed valve spring, sliding valve stem, pressure valve outer spring, pressure valve inner spring, spring seat, pressure regulating screw and lock cap are installed in the center of the piston rod from top to bottom. The bottom end of the piston rod is connected to the impact seat through a snap ring and a cylindrical pin. The pressure valve seat is threaded and installed on the top end of the piston rod. The open end of the bottom end of the pressure valve seat contacts the top end of the pressure valve stem. The secondary speed valve plate is sleeved on the pressure valve stem, and the bottom end of the pressure valve stem is installed on the sliding valve stem. , and a secondary speed valve spring is provided between the secondary speed valve plate and the sliding valve rod, the top end of the secondary speed valve spring contacts the lower end surface of the secondary speed valve plate, and the bottom end of the secondary speed valve spring contacts the bottom surface of the groove of the sliding valve rod, the pressure valve outer spring is sleeved outside the pressure valve inner spring, and the top end of the pressure valve outer spring and the top end of the pressure valve inner spring contact the bottom end of the sliding valve rod, the bottom end of the pressure valve outer spring and the bottom end of the pressure valve inner spring contact the upper end surface of the spring seat, the bottom end of the spring seat contacts the top end of the pressure regulating screw, and the bottom end of the pressure regulating screw is installed on the piston rod through a spring washer and a lock cap.

[0007] The upper end surface of the piston rod is radially evenly processed with multiple countersunk holes, each countersunk hole is provided with a one-way valve pressure column and a one-way valve steel ball, the one-way valve pressure column is arranged on the top of the countersunk hole, and the edge of the pressure valve seat is pressed above the one-way valve pressure column, the one-way valve steel ball is arranged below the one-way valve pressure column, the locking valve assembly and the return valve sleeve are arranged on the piston rod below the one-way valve steel ball, and the locking valve assembly and the return valve are inserted with two elastic cylindrical pins, the two elastic cylindrical pins are symmetrically arranged, and the flat key is vertically embedded in the outer wall of the piston rod, and the inner wall of the locking valve assembly and the return valve is provided with a flat key sliding groove, and the bottom end of the return valve is installed with a pressure maintaining plate, the sliding cylinder and the adjusting pad are installed in the housing, the adjusting pad is arranged below the impact seat, the exhaust pipe is installed on the housing and connected to the housing, and the housing is detachably connected and installed on the rail by stud bolts and nuts.

[0008] Compared with the prior art, the present invention has the following beneficial effects:

[0009] 1. The design of the secondary critical speed mechanism is optimized, the sliding valve stem is enlarged, the force-bearing area of the secondary speed valve is increased, and the accuracy of the secondary critical speed is improved.

[0010] 2. A one-way valve is designed on the piston to avoid poor sealing performance of the one-way valve plate due to glue or fitting reasons, thus solving the problem of no pressure maintenance.

[0011] 3. When in the locked position, when the vehicle passes through the top at a speed lower than the secondary critical speed of the top, the oil is ejected through the flow hole at the lower end of the piston rod wall, pushing the unlocking mechanism to unlock, and the action is stable and reliable.

[0012] 4. The pressure valve utilizes a flow-guiding platform cone valve with adjustable pressure. When the over-the-top speed is below the secondary critical speed, the high-pressure cone valve opens, generating high pressure and braking power. When the over-the-top speed exceeds the secondary critical speed, the secondary speed valve closes, resulting in low pressure and minimal reaction force, enabling high-speed locking.

[0013] 5. Use large diameter oil cylinder and piston rod to improve component strength, increase heat dissipation area and guide distance.

[0014] 6. The integrated locking valve assembly structure is adopted, and the built-in spring pushes the steel ball to generate pre-pressure, which falls into the pit set on the piston rod wall to improve the stability of unlocking and locking. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is the main view of the overall structure of this application.

[0016] Figure 2 It is a front view of the positioning ball sleeve 46, the positioning steel ball 47 and the positioning spring 48 installed on the lock valve 45.

[0017] Figure 3 This is a schematic diagram of the deceleration braking state in which the hydraulic oil flows through the edge of the secondary speed valve plate 9 and the flow hole of the sliding valve rod 17 into the lower cavity of the sliding valve rod 17 and then into the lower cavity of the sliding cylinder 30. The arrow in the figure shows the flow direction of the hydraulic oil.

[0018] Figure 4 It is a schematic diagram showing that the return valve 13 and the locking valve assembly 11 rotate clockwise by a certain angle in the deceleration braking state.

[0019] Figure 5 It is a schematic diagram of the steel ball 47 entering the corresponding pit on the piston rod 7 after rotation in the deceleration braking state.

[0020] Figure 6 This is a schematic diagram of the hydraulic oil returning from the lower chamber of the sliding cylinder 30 to the upper chamber in the deceleration braking state. The arrow in the figure shows the flow direction of the hydraulic oil.

[0021] Figure 7 This is a schematic diagram of when the pressure on the secondary speed valve plate 9 in the locked state overcomes the pre-pressure of the secondary speed valve spring 10, the hydraulic oil in the upper chamber of the sliding valve rod 17 pushes the sliding valve rod 17 downward, and flows into the lower chamber of the sliding cylinder 30 through the piston rod 7 and the locking valve 45.

[0022] Figure 8 It is a schematic diagram of the counterclockwise rotation angle of the locking valve assembly 11 and the return valve 13 in the locked state.

[0023] Figure 9 It is a schematic diagram of the steel ball 47 entering the pit at the corresponding position on the piston rod 7 after rotation.

[0024] Figure 10 This is a schematic diagram of the anti-slip roof of this application.

[0025] Figure 11 yes Figure 1 Enlarged view of point A in the middle.

[0026] Figure 12 Schematic diagram of the cotter pin 41, the fifth O-shaped sealing ring 42 and the stop pin 43 before connection. DETAILED DESCRIPTION

[0027] Specific implementation method 1: Combination Figures 1-12 Describing this embodiment, the high-load, high-speed locking parking anti-slip roof comprises a housing 35, a stud bolt 36, a nut 37 and an exhaust pipe 40, and further comprises a pressure valve seat 1, a piston rod 7, a pressure valve stem 8, a secondary speed valve plate 9, a secondary speed valve spring 10, a locking valve assembly 11, a return valve 13, a pressure maintaining plate 14, a sliding valve stem 17, a sealing cover 18, a pressure valve outer spring 19, a pressure valve inner spring 20, a spring seat 21, a pressure regulating screw 23, a spring washer 24, a locking cap 25, a retaining ring 26, a cylindrical pin 27, a stop seat 28, an elastic cylindrical pin 29, a sliding cylinder 30, a flat key 33, an adjusting washer 44, two elastic cylindrical pins 12, a plurality of one-way valve pressure columns 3 and a plurality of one-way valve steel balls 5;

[0028] The sealing cover 18 is installed on the bottom end of the sliding cylinder 30, and the piston rod 7 is inserted on the sealing cover 18. The pressure valve seat 1, the pressure valve stem 8, the secondary speed valve plate 9, the secondary speed valve spring 10, the sliding valve stem 17, the pressure valve outer spring 19, the pressure valve inner spring 20, the spring seat 21, the pressure regulating screw 23 and the lock cap 25 are installed in the center of the piston rod 7 from top to bottom. The bottom end of the piston rod 7 is connected to the impact seat 28 through the retaining ring 26 and the cylindrical pin 27. The pressure valve seat 1 is threadedly installed on the top end of the piston rod 7. The open end of the bottom end of the pressure valve seat 1 contacts the top end of the pressure valve stem 8. The secondary speed valve plate 9 is sleeved on the pressure valve stem 8, and the bottom end of the pressure valve stem 8 is installed on the sliding valve stem 17 On the upper side, a secondary speed valve spring 10 is provided between the secondary speed valve plate 9 and the sliding valve rod 17. The top end of the secondary speed valve spring 10 contacts the lower end surface of the secondary speed valve plate 9, and the bottom end of the secondary speed valve spring 10 contacts the bottom surface of the groove of the sliding valve rod 17. The pressure valve outer spring 19 is sleeved on the outside of the pressure valve inner spring 20, and the top end of the pressure valve outer spring 19 and the top end of the pressure valve inner spring 20 contact the bottom end of the sliding valve rod 17. The bottom end of the pressure valve outer spring 19 and the bottom end of the pressure valve inner spring 20 contact the upper end surface of the spring seat 21, and the bottom end of the spring seat 21 contacts the top end of the pressure regulating screw 23. The bottom end of the pressure regulating screw 23 is installed on the piston rod 7 through the spring washer 24 and the lock cap 25.

[0029] The upper end surface of the piston rod 7 is uniformly processed with a plurality of countersunk holes along the radial direction, and a one-way valve pressure column 3 and a one-way valve steel ball 5 are arranged in each countersunk hole. The one-way valve pressure column 3 is arranged on the top of the countersunk hole, and the edge of the pressure valve seat 1 is pressed on the top of the one-way valve pressure column 3. The one-way valve steel ball 5 is arranged below the one-way valve pressure column 3. The locking valve assembly 11 and the return valve 13 are sleeved on the piston rod 7 below the one-way valve steel ball 5, and the locking valve assembly 11 and the return valve 13 are inserted with two elastic cylindrical pins 12, two elastic cylindrical pins 13. The pins 12 are symmetrically arranged, the flat keys 33 are vertically embedded in the outer wall of the piston rod 7, the inner walls of the locking valve assembly 11 and the return valve 13 are provided with flat key sliding grooves, the bottom end of the return valve 13 is installed with a pressure maintaining plate 14, the sliding cylinder 30 and the adjusting pad 44 are installed in the shell 35, the adjusting pad 44 is arranged below the impact seat 28, the exhaust pipe 40 is installed on the shell 35 and is connected to the shell 35, and the shell 35 is detachably connected to the rail 38 by stud bolts 36 and nuts 37.

[0030] In this embodiment, two elastic cylindrical pins 12 radially limit the locking valve assembly 11 and the return valve 13. The use of a check valve pressure column 3 and a check valve steel ball 5 provides a simple, reliable structure, easy processing, and low manufacturing costs. The locking valve assembly 11 and the return valve 13 are cleverly designed for easy unlocking and convenient processing. The locking valve assembly 11 adopts an integrated structure, which improves the stability of locking and unlocking.

[0031] Specific implementation method 2: Combination Figures 1-10 Explain this embodiment. This embodiment describes a high-load, high-speed locking parking anti-slip roof. The locking valve assembly 11 includes a locking valve 45 and a positioning piece. The locking valve 45 is an annular sleeve. Four first inclined flow holes are evenly distributed along the radial direction on the annular sleeve. Each first inclined flow hole is tangent to the circle where the inner circular surface of the locking valve 45 is located. Four straight flow holes are evenly distributed on the outer wall of the piston rod 7 opposite to the locking valve 45, and each first inclined flow hole on the locking valve 45 is corresponding to a straight flow hole on the piston rod 7. Two elastic cylindrical pin mounting holes are vertically processed on the lower end surface of the locking valve 45. A flat key sliding groove is processed on the inner wall of the locking valve 45. The positioning piece is installed on the locking valve 45. The aperture of the first inclined flow hole is larger than that of the straight flow hole.

[0032] The return valve 13 is an annular sleeve body, on which four second inclined flow holes are evenly distributed along the radial direction, each second inclined flow hole is tangent to the circle where the inner circle of the return valve 13 is located, and four third inclined flow holes are evenly distributed on the outer wall of the piston rod 7 opposite to the return valve 13, and each second inclined flow hole on the return valve 13 is corresponding to a third inclined flow hole on the piston rod 7. The upper end surface of the return valve 13 is vertically processed with two elastic cylindrical pin mounting holes, and the inner wall of the return valve 13 is processed with a flat key sliding groove. The aperture of the second inclined flow hole is larger than that of the third inclined flow hole.

[0033] The lock valve 45 and return valve 13 are mounted on the piston rod 7. An elastic cylindrical pin 12 is installed in each elastic cylindrical pin mounting hole of the lock valve 45 and the elastic cylindrical pin mounting hole of the return valve 13 below. A flat key 33 is vertically installed in the flat key sliding groove of the lock valve 45 and the flat key sliding groove of the return valve 13 below. The rest of the components and connection method are the same as those of the first embodiment.

[0034] Specific implementation method three: Combination Figure 1 and Figure 2 This embodiment describes a high-load, high-speed locking parking anti-slip roof. The positioning components include a positioning ball sleeve 46, a positioning steel ball 47, and a positioning spring 48. Positioning ball sleeve 46 is mounted on locking valve 45 and has a steel ball mounting groove machined therein. Positioning steel ball 47 and positioning spring 48 are positioned within the groove. One end of positioning spring 48 contacts the spherical surface of positioning steel ball 47, while the other end of positioning spring 48 contacts the bottom surface of the groove. Two radial recesses are machined on the outer wall of piston rod 7, with the spherical surface of positioning steel ball 47 positioned within either recess. Other components and connection methods are the same as those in the first embodiment.

[0035] Specific implementation method four: Combination Figure 12 This embodiment describes a high-load, high-speed locking parking anti-slip roof. It also includes a cotter pin 41, a fifth O-ring 42, and a check pin 43. Check pin 43 is inserted into the side wall of housing 35 near the bottom of housing 35, and is fitted with the fifth O-ring 42. One end of check pin 43 is positioned above check seat 28 within housing 35, and the other end of check pin 43 is provided with a cotter pin 41. Other components and connection methods are the same as those in the first embodiment.

[0036] Specific implementation method five: Combination Figures 1-10 This embodiment describes a high-load, high-speed, locking, parking, and anti-slip roof. It also includes a sealing gasket 2 and a support ring 4. The sealing gasket 2 is mounted on the pressure valve seat 1, sealing the pressure valve seat 1 and the piston rod 7 via the sealing gasket 2. The support ring 4 is mounted on the outer wall of the piston rod 7 near the top, and is located between the piston rod 7 and the sliding cylinder 30. Other components and connections are the same as those in the first embodiment.

[0037] Specific implementation method six: combination Figures 1-10This embodiment describes a high-load, high-speed locking parking anti-slip roof, which also includes a first O-ring 6, a second O-ring 16, a third O-ring 22, a spring washer 24, a sealing ring 31, and a fourth O-ring 32. The first O-ring 6 is disposed on the piston rod 7 below the support ring 4, sealing the piston rod 7 and the sliding cylinder 30 via the first O-ring 6. The second O-ring 16 is mounted on the outer wall of the sealing cover 18, sealing the sealing cover 18 and the sliding cylinder 30 via the second O-ring 16. The third O-ring 22 is mounted on the bottom of the spring seat 21, sealing the spring seat 21 and the inner hole of the piston rod 7 via the third O-ring 22. The sealing ring 31 and the fourth O-ring 32 are embedded in the inner wall of the sealing cover 18, sealing the sealing cover 18 and the outer wall of the piston rod 7 via the sealing ring 31 and the fourth O-ring 32. The other components and connection methods are the same as those of the fourth or fifth embodiment.

[0038] Specific implementation method seven: combination Figures 1-10 This embodiment describes a high-load, high-speed locking parking anti-slip roof. It also includes a shaft retaining ring 15 , which is disposed on the piston rod 7 below the pressure-retaining plate 14 and retains the pressure-retaining plate 14 . The other components and connection methods are the same as those of the first embodiment.

[0039] Specific implementation method eight: combination Figure 1 This embodiment describes a high-load, high-speed locking parking anti-slip roof. It also includes an upper bushing 34 and a dust seal 39. The dust seal 39 and upper bushing 34 are installed from top to bottom at the top opening of a housing 35, providing a dust-proof seal. Other components and connections are the same as those in the first embodiment.

[0040] Specific implementation method nine: Combination Figure 1 This embodiment is a high-load, high-speed locking parking anti-slip roof. A through hole is machined axially on the one-way valve pressure column 3. Other components and connection methods are the same as those of the first embodiment.

[0041] Specific implementation method ten: Combination Figure 1 This embodiment is a high-load, high-speed locking parking anti-slip roof. It also includes an elastic cylindrical pin 29, which is inserted into the bottom end of the sealing cover 18 and the sliding cylinder 30. The other components and connection methods are the same as those of the first embodiment.

[0042] Specific implementation method 11: Combination Figure 1 、 Figure 2 、 Figure 6 and Figure 7This embodiment describes a high-load, high-speed locking and anti-slip stop mechanism. The rotation of the lock valve 45 and return valve 13 is limited by a flat key 33. At the start of rotation, a positioning steel ball 47 presses against a recess in the outer wall of the piston rod 7. At the end of rotation, the positioning steel ball 47 presses against another recess in the outer wall of the piston rod 7. Other components and connections are identical to those in the first embodiment.

[0043] How it works

[0044] 1. Deceleration and braking state

[0045] Figure 3 The middle arrow shows the flow trajectory of the hydraulic oil. When the vehicle passes through the deceleration top at a speed lower than the second critical speed of the top, the wheel presses down the sliding cylinder 30 of the top, and the volume of the upper chamber of the sliding cylinder 30 is reduced, forcing the nitrogen in the upper chamber to be compressed sharply, causing the pressure to rise rapidly. When the pressure rises to the predetermined opening pressure of the pressure valve stem 8, the pressure valve stem 8 opens, and the hydraulic oil passes through the pressure valve stem 8 at a certain pressure, flows to the upper chamber of the sliding valve stem 17, and then flows through the edge of the secondary speed valve plate 9 and the flow hole of the sliding valve stem 17 into the lower chamber of the sliding valve stem 17, and is ejected to the lower chamber of the sliding cylinder 30 through the third inclined flow hole of the piston rod 7. The ejected hydraulic oil is sprayed onto the outer surface of the second inclined flow hole of the return valve 13. Due to the action of the hydraulic oil sprayed on the inclined surface, the return valve 13 and the locking valve assembly 11 rotate clockwise by a certain angle as shown in FIG. Figure 4 As shown by the arrow, after the rotation, the steel ball 47 on the locking valve assembly 11 enters the corresponding position of the pit on the piston rod 7 to prevent movement. Figure 5 At this time, the top of the vehicle decelerates and does work on the vehicle.

[0046] Figure 6 The middle arrow shows the flow trajectory of the hydraulic oil. When the vehicle wheel presses the sliding cylinder 30 of the top to the lowest point, since the flow hole on the locking valve assembly 11 and the flow hole on the piston rod 7 remain in communication, the sliding cylinder 30, which is pressed to the lowest point, is subjected to the expansion force of the compressed nitrogen in the upper chamber. The hydraulic oil in the lower chamber rushes open the one-way valve steel ball 5 along this channel and returns to the upper chamber from the lower chamber of the sliding cylinder 30. The sliding cylinder 30 rises steadily to the highest position at a certain speed, and the top returns to normal working condition.

[0047] 2. Locked state

[0048] Figure 7The middle arrow indicates the flow path of hydraulic oil. When a vehicle passes at a speed higher than the second critical speed of the top, the wheels push the top sliding cylinder 30 downward at a higher speed. After the pressure valve stem 8 opens, hydraulic oil flows through the pressure valve stem 8 at a high flow rate into the upper chamber of the spool valve stem 17. Then, along the edge of the secondary speed valve plate 9 and the flow hole of the spool valve stem 17, it flows into the lower chamber of the spool valve stem 17. When this flow rate increases to a certain value, the pressure difference between the upper and lower chambers of the secondary speed valve plate 9 increases sharply. When the pressure above the secondary speed valve plate 9 is sufficient to overcome the preload of the secondary speed valve spring 10, the secondary speed valve plate 9 closes, and the oil flow between the upper and lower chambers of the spool valve stem 17 is cut off. At this time, the hydraulic oil in the upper chamber of the spool valve stem 17 pushes the spool valve stem 17 downward, opening the piston rod 7 and directly passing through the flow hole, and the hydraulic oil is ejected from the flow hole. The hydraulic oil is sprayed onto the outer surface of the first inclined flow hole of the locking valve assembly 11. Due to the effect of the hydraulic oil sprayed on the inclined surface, the locking valve assembly 11 and the return valve 13 rotate counterclockwise by a certain angle. Figure 8 As shown by the arrow, the steel ball 47 on the locking valve assembly 11 enters the corresponding position of the pit on the piston rod 7 to prevent movement. Figure 9 shown.

[0049] When the sliding cylinder 30 is pressed down to the lowest position and then returns, the locking valve assembly 11 closes the throttle hole of the piston rod 7, and the oil paths of the upper and lower chambers of the sliding cylinder 30 are cut off. The hydraulic oil in the lower chamber of the sliding cylinder 30 cannot flow back to the upper chamber normally, and the sliding cylinder 30 is locked in a position below the rail surface. At this time, the top has no braking effect on the wheels passing behind.

[0050] After the high-speed vehicle passes, the sliding cylinder 30 slowly returns to the highest position under the action of micro-leakage control. At this time, the top is still in a locked state. If the following vehicle passes the deceleration top at a speed lower than the second critical speed of the top, the top enters the deceleration braking state.

[0051] 3. Wheel stop and anti-slip status

[0052] like Figure 10 As shown, when the wheel of a parked vehicle contacts the top sliding cylinder 30 and the sliding cylinder 30 is pressed down, the volume of its upper chamber decreases, forcing the nitrogen to compress and the pressure in the upper chamber to rise. This causes the sliding cylinder 30 to generate a vertical reaction force and a horizontal force component on the wheel. This horizontal force prevents the wheel from rolling. Because the one-way valve ball 5 seals the valve port and a seal is provided between the piston rod 7 and the sliding cylinder 30, the oil path and gap between the upper and lower chambers of the sliding cylinder 30 are cut off. The upper chamber of the sliding cylinder 30 can maintain a high pressure state for a long time. Therefore, the top can maintain a high horizontal braking force on the vehicle for a long time, thus preventing the wheel from slipping.

Claims

1. A high-load, high-speed locking parking anti-slip roof, comprising a housing (35), stud bolts (36), nuts (37) and an exhaust pipe (40), characterized in that: It also includes a pressure valve seat (1), a piston rod (7), a pressure valve stem (8), a secondary speed valve plate (9), a secondary speed valve spring (10), a locking valve assembly (11), a return valve (13), a pressure maintaining plate (14), a sliding valve stem (17), a sealing cover (18), a pressure valve outer spring (19), a pressure valve inner spring (20), a spring seat (21), a pressure regulating screw (23), a spring washer (24), a locking cap (25), a snap ring (26), a cylindrical pin (27), a stop seat (28), a first elastic cylindrical pin (29), a sliding oil cylinder (30), a flat key (33), an adjusting washer (44), two second elastic cylindrical pins (12), a plurality of one-way valve pressure columns (3) and a plurality of one-way valve steel balls (5); the locking valve assembly (11) includes a locking valve (45) and a positioning member, and the locking valve (45) is an annular sleeve; the positioning member includes a positioning ball sleeve (46), a positioning steel ball (47) and a positioning spring (48); The sealing cover (18) is installed on the bottom end of the sliding cylinder (30), the piston rod (7) is inserted into the sealing cover (18), the pressure valve seat (1), the pressure valve stem (8), the secondary speed valve plate (9), the secondary speed valve spring (10), the sliding valve stem (17), the pressure valve outer spring (19), the pressure valve inner spring (20), the spring seat (21), the pressure regulating screw (23) and the lock cap (25) are installed in sequence from top to bottom at the center of the piston rod (7), the bottom end of the piston rod (7) is connected to the impact stop seat (28) through the snap ring (26) and the cylindrical pin (27), the pressure valve seat (1) is threadedly installed on the top end of the piston rod (7), the bottom open end of the pressure valve seat (1) contacts the top end of the pressure valve stem (8), the secondary speed valve plate (9) is sleeved on the pressure valve stem (8), and the bottom end of the pressure valve stem (8) is installed on the sliding cylinder (7). A secondary speed valve spring (10) is provided on the valve stem (17), and between the secondary speed valve plate (9) and the sliding valve stem (17), the top end of the secondary speed valve spring (10) contacts the lower end surface of the secondary speed valve plate (9), the bottom end of the secondary speed valve spring (10) contacts the bottom surface of the groove of the sliding valve stem (17), the pressure valve outer spring (19) is sleeved on the outside of the pressure valve inner spring (20), and the top end of the pressure valve outer spring (19) and the top end of the pressure valve inner spring (20) contact the bottom end of the sliding valve stem (17), the bottom end of the pressure valve outer spring (19) and the bottom end of the pressure valve inner spring (20) contact the upper end surface of the spring seat (21), the bottom end of the spring seat (21) contacts the top end of the pressure regulating screw (23), and the bottom end of the pressure regulating screw (23) is installed on the piston rod (7) through the spring washer (24) and the lock cap (25). The upper end surface of the piston rod (7) is uniformly processed with a plurality of countersunk holes along the radial direction, and a one-way valve pressure column (3) and a one-way valve steel ball (5) are provided in each countersunk hole. The one-way valve pressure column (3) is arranged on the top of the countersunk hole, and the edge of the pressure valve seat (1) is pressed above the one-way valve pressure column (3). The one-way valve steel ball (5) is arranged below the one-way valve pressure column (3). The locking valve assembly (11) and the return valve (13) are sleeved on the piston rod (7) below the one-way valve steel ball (5), and the locking valve assembly (11) and the return valve (13) are inserted with two second elastic cylindrical pins (12). The two second elastic cylindrical pins (12) are symmetrically arranged, the flat key (33) is vertically embedded in the outer wall of the piston rod (7), the inner wall of the locking valve assembly (11) and the return valve (13) is provided with a flat key sliding groove, the bottom end of the return valve (13) is installed with a pressure retaining plate (14), the sliding cylinder (30) and the adjustment pad (44) are installed in the housing (35), the adjustment pad (44) is arranged below the impact stop seat (28), the exhaust pipe (40) is installed on the housing (35) and communicates with the housing (35), and the housing (35) is detachably connected to the rail (38) by stud bolts (36) and nuts (37). Four first inclined flow holes are evenly distributed along the radial direction on the annular sleeve body, and each first inclined flow hole is tangent to the circle where the inner circular surface of the lock valve (45) is located. Four straight flow holes are evenly distributed on the outer wall of the piston rod (7) opposite to the lock valve (45), and each first inclined flow hole on the lock valve (45) is corresponding to a straight flow hole on the piston rod (7). Two elastic cylindrical pin mounting holes are vertically processed on the lower end surface of the lock valve (45). A flat key sliding groove is processed on the inner wall of the lock valve (45). The positioning member is installed on the lock valve (45). The return valve (13) is an annular sleeve body. Four second inclined flow holes are evenly distributed along the radial direction on the annular sleeve body. Each second inclined flow hole is tangent to the circle where the inner circular surface of the return valve (13) is located. Four third inclined flow holes are evenly distributed on the outer wall of the plug rod (7) opposite to the return valve (13), and each second inclined flow hole on the return valve (13) is arranged corresponding to a third inclined flow hole on the piston rod (7). Two elastic cylindrical pin mounting holes are vertically processed on the upper end surface of the return valve (13), and a flat key sliding groove is processed on the inner wall of the return valve (13). The locking valve (45) and the return valve (13) are sleeved on the piston rod (7). A second elastic cylindrical pin (12) is installed in each elastic cylindrical pin mounting hole of the locking valve (45) and the elastic cylindrical pin mounting hole of the lower return valve (13). A flat key (33) is vertically provided in the flat key sliding groove of the locking valve (45) and the flat key sliding groove of the lower return valve (13). The positioning ball sleeve (46) is mounted on the lock valve (45). A steel ball mounting groove is machined on the positioning ball sleeve (46). The positioning steel ball (47) and the positioning spring (48) are arranged in the steel ball mounting groove. One end of the positioning spring (48) contacts the spherical surface of the positioning steel ball (47), and the other end of the positioning spring (48) contacts the bottom surface of the steel ball mounting groove. Two pits are machined radially on the outer wall of the piston rod (7), and the spherical surface of the positioning steel ball (47) is arranged in any one of the pits.

2. The high-load, high-speed locking parking anti-slip roof according to claim 1, characterized in that: It also includes a split pin (41), a fifth O-type sealing ring (42) and a stop pin (43); the stop pin (43) is inserted into the side wall of the shell (35) near the bottom of the shell (35), and the fifth O-type sealing ring (42) is sleeved on the stop pin (43); one end of the stop pin (43) is arranged above the stop seat (28) in the shell (35), and the other end of the stop pin (43) is provided with a split pin (41).

3. The high-load, high-speed locking parking anti-slip roof according to claim 1, characterized in that: It also includes a sealing gasket (2) and a supporting ring (4); the sealing gasket (2) is mounted on the pressure valve seat (1), the pressure valve seat (1) and the piston rod (7) are sealed by the sealing gasket (2), and the outer side wall of the piston rod (7) near the top is mounted with a supporting ring (4), and the supporting ring (4) is located between the piston rod (7) and the sliding cylinder (30).

4. The high-load, high-speed locking parking anti-slip roof according to claim 3, characterized in that: It also includes a first O-ring (6), a second O-ring (16), a third O-ring (22), a spring washer (24), a sealing ring (31), and a fourth O-ring (32); the first O-ring (6) is arranged on the piston rod (7) below the support ring (4), and the piston rod (7) and the sliding cylinder (30) are sealed by the first O-ring (6); the second O-ring (16) is sleeved on the outer wall of the sealing cover (18), and the second O-ring (16) is sleeved on the outer wall of the sealing cover (18), and the second O-ring (16) is sleeved on the outer wall of the sealing cover (18). The sealing ring (16) seals the sealing cover (18) and the sliding cylinder (30). The bottom of the spring seat (21) is provided with a third O-shaped sealing ring (22). The inner hole of the spring seat (21) and the piston rod (7) are sealed by the third O-shaped sealing ring (22). The inner wall of the sealing cover (18) is embedded with a sealing ring (31) and a fourth O-shaped sealing ring (32). The outer wall of the sealing cover (18) and the piston rod (7) are sealed by the sealing ring (31) and the fourth O-shaped sealing ring (32).

5. The high-load, high-speed locking parking anti-slip roof according to claim 1, characterized in that: It also includes a shaft retaining ring (15), which is arranged on the piston rod (7) below the pressure-maintaining plate (14) and blocks the pressure-maintaining plate (14) through the shaft retaining ring (15).

6. The high-load, high-speed locking parking anti-slip roof according to claim 1, characterized in that: It also includes an upper bushing (34) and a dust ring (39), which are installed at the top opening of the shell (35) from top to bottom, and are dust-proof and sealed by the upper bushing (34) and the dust ring (39).

7. The high-load, high-speed locking parking anti-slip roof according to claim 1, characterized in that: A through hole is machined in the axial direction on the one-way valve pressure column (3).

8. The high-load, high-speed locking parking anti-slip roof according to claim 1, characterized in that: The first elastic cylindrical pin (29) is inserted into the sealing cover (18) and the bottom end of the sliding cylinder (30).

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