Parking auxiliary device for freight vehicle

Abstract

The utility model discloses a parking auxiliary device for a freight vehicle. The parking auxiliary device comprises a fixing disc, a shell, a guide cylinder, a clamping part and a reset spring. The fixed disc is fixedly mounted on an output shaft of the gearbox; the shell is arranged on the fixing disc in a sleeving mode and fixedly connected with a shell of the gearbox. Baffle rings are fixedly arranged at the two ends of the shell; the guide cylinders are arranged in the shell, and the two guide cylinders are located on the two sides of the fixed disc respectively; the output shaft of the gearbox is sleeved with the guide cylinder, and one end of the guide cylinder is fixedly connected with the baffle ring on the corresponding side. A mounting groove is formed between the guide cylinder and the shell, the two clamping parts are slidably mounted in the mounting groove respectively, and the clamping parts are fixed in the circumferential side direction of the guide cylinder; the clamping part is hermetically connected with the shell and the guide cylinder; and a sealing cavity capable of being filled with high-pressure gas is formed between the clamping part and the baffle ring on the corresponding side. The auxiliary parking device can assist in parking the truck after the truck is parked, and the truck is prevented from sliding.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle braking, and particularly relates to a parking assistance device for a freight vehicle. Background Art

[0002] When the existing freight vehicles brake, a pneumatic braking system is mostly adopted. After braking, due to the large weight of the freight vehicle when loaded, when the freight vehicle is parked on a slightly sloped road surface, it is easy to slip, resulting in potential safety hazards. Currently, bricks, stones, and wood (clamping parts) are mostly placed in front of the wheels in the possible slipping direction to block the wheels. However, carrying bricks, stones, wood, etc. with the vehicle takes up space and is very inconvenient to fetch back and forth.

[0003] Therefore, it is very necessary to design a parking assistance device. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a parking assistance device for a freight vehicle to solve the deficiencies in the prior art. It can assist in parking the freight vehicle after it stops, prevent the freight vehicle from slipping, and improve the safety of the freight vehicle after parking.

[0005] The utility model provides a parking assistance device for a freight vehicle, which includes a fixed disk, a housing, a guide cylinder, a clamping part, and a return spring;

[0006] The fixed disk is fixedly installed on the output shaft of the gearbox;

[0007] The housing is sleeved on the fixed disk, and the housing is fixedly connected to the outer shell of the gearbox; retaining rings are fixedly arranged at both ends of the housing;

[0008] The guide cylinder is arranged in the housing. There are two guide cylinders, and the two guide cylinders are respectively located on both sides of the fixed disk; the guide cylinder is sleeved on the output shaft, and one end of the guide cylinder is fixedly connected to the corresponding retaining ring; an installation groove is formed between the guide cylinder and the housing. There are two clamping parts, and the two clamping parts are respectively slidably installed in the installation groove and are fixed in the circumferential direction of the guide cylinder; the clamping parts are hermetically connected to both the housing and the guide cylinder;

[0009] A sealed cavity capable of filling high-pressure gas is formed between the clamping part and the corresponding retaining ring;

[0010] The return spring is installed in the sealed cavity. One end of the return spring is fixedly connected to the retaining ring, and the other end is fixedly connected to the clamping part.

[0011] A parking assist device for a freight vehicle as described above. Preferably, the clamping portion includes a first connecting cylinder and a clamping disc. One end of the first connecting cylinder is fixedly connected to the clamping disc. A first mounting hole for the output shaft to pass through is provided at the center of the clamping disc. The first connecting cylinder is sleeved on the guiding cylinder, and the first connecting cylinder is in sliding and sealing connection with both the housing and the guiding cylinder. One end of the return spring is fixedly connected to the retaining ring, and the other end is fixedly connected to the first connecting cylinder.

[0012] A parking assist device for a freight vehicle as described above. Preferably, first grooves and second grooves are provided on the outer sidewall of the first connecting cylinder along its circumferential direction. Lubricating grease is placed in the first grooves, and first sealing rings are provided in the second grooves. Third grooves and fourth grooves are provided on the inner sidewall of the first connecting cylinder along its circumferential direction. Lubricating grease is placed in the third grooves, and second sealing rings are provided in the fourth grooves.

[0013] A parking assist device for a freight vehicle as described above. Preferably, both the second grooves and the fourth grooves are multiple.

[0014] A parking assist device for a freight vehicle as described above. Preferably, the first grooves are provided on one side of the first connecting cylinder close to the fixed disc.

[0015] A parking assist device for a freight vehicle as described above. Preferably, anti-slip lines are provided on one side of the clamping disc close to the fixed disc.

[0016] A parking assist device for a freight vehicle as described above. Preferably, the cross-section of the inner hole of the first connecting cylinder is quadrilateral, and chamfers are provided at the joints of the quadrilateral. The guiding cylinder has a shape adapted to the inner hole of the first connecting cylinder.

[0017] A parking assist device for a freight vehicle as described above. Preferably, a first vent hole communicating with the sealing cavity is provided on the housing. The first vent hole is connected to a high-pressure gas supply source through a three-position three-way valve.

[0018] A parking assist device for a freight vehicle as described above. Preferably, an air storage tank is provided on the housing. The first vent hole communicates with the air storage tank. A second vent hole is provided on the air storage tank, and the second vent hole is connected to a high-pressure gas supply source through a three-position three-way valve.

[0019] A parking assist device for a freight vehicle as described above. Preferably, one of the retaining rings is fixedly connected to the housing by screws, and a sealing gasket is provided at the joint of the retaining ring and the housing.

[0020] Compared with the prior art, the utility model has the following beneficial effects:

[0021] 1. After the freight vehicle stops, by filling high-pressure gas into the sealed cavity, the clamping parts on both sides of the fixed disk are pushed by the high-pressure gas, so that the clamping parts are clamped and fixed from both sides of the fixed disk, which can effectively prevent the freight vehicle from slipping and improve the safety of the freight vehicle after parking.

[0022] 2. The connection structure of the utility model is simple and convenient to install and use. Description of the Drawings

[0023] Figure 1 is a schematic installation structure diagram of a parking auxiliary device for a freight vehicle and an output shaft of a gearbox proposed by the utility model;

[0024] Figure 2 is Figure 1 a sectional view of;

[0025] Figure 3 is a schematic structure diagram of the clamping part;

[0026] Figure 4 is a schematic installation structure diagram of a retaining ring and a guide cylinder;

[0027] Description of the Reference Numerals:

[0028] 1 - fixed disk, 2 - housing, 3 - guide cylinder, 4 - clamping part, 5 - return spring, 6 - retaining ring, 8 - sealed cavity, 9 - anti-slip pattern, 10 - first ventilation hole, 11 - air storage tank, 41 - first connecting cylinder, 42 - clamping disk, 411 - first groove, 412 - second groove, 413 - third groove, 414 - fourth groove, 421 - first mounting hole. Detailed Embodiment

[0029] The embodiments described below with reference to the drawings are exemplary and are only used to explain the utility model, and should not be construed as limiting the utility model.

[0030] Embodiment of the utility model: As Figures 1-4 shown, the utility model proposes a parking auxiliary device for a freight vehicle, including a fixed disk 1, a housing 2, a guide cylinder 3, a clamping part 4 and a return spring 5;

[0031] The fixed disk 1 is provided with an installation hole at its center. The fixed disk 1 is sleeved on the output shaft 7 of the gearbox through the installation hole and is fixedly connected by welding. The housing 2 is a cylindrical barrel. The housing 2 is sleeved on the fixed disk 1 and the housing 2 does not contact the fixed disk 1 to prevent friction between the fixed disk 1 and the housing 2 when the fixed disk 1 rotates with the output shaft 7 of the gearbox. The housing 2 and the outer shell of the gearbox are fixedly connected by bolts. Two retaining rings 6 are fixedly provided at both ends of the housing 2; the connection between the retaining ring 6 and the housing 2 is a sealed connection. The center line of the retaining ring 6 coincides with the center line of the housing 2, and the retaining ring 6 does not contact the output shaft 7 of the gearbox.

[0032] The guide cylinders 3 are arranged inside the housing 2. There are two guide cylinders 3, and the two guide cylinders 3 are respectively located on both sides of the fixed disk 1; the guide cylinders 3 are sleeved on the output shaft 7 of the gearbox and do not contact the output shaft 7 of the gearbox. One end of the guide cylinder 3 is fixedly connected to the corresponding retaining ring 6 by welding. An installation groove is formed between the guide cylinder 3 and the housing 2; the center line of the guide cylinder 3 coincides with the center line of the housing 2;

[0033] There are two clamping parts 4. The two clamping parts 4 are respectively slidably installed in the installation groove. The clamping parts 4 are fixed in the circumferential direction of the guide cylinder 3, that is, the clamping parts 4 can move along the guide cylinder 3 but cannot rotate relative to the guide cylinder 3; the clamping parts 4 are in sealed connection with both the housing 2 and the guide cylinder 3; a sealed cavity 8 capable of filling high-pressure gas is formed between the clamping part 4 and the corresponding retaining ring 6; with such a setting, when high-pressure gas is filled into the sealed cavity 8, the high-pressure gas can push the clamping part 4 to move towards the fixed disk 1 and clamp the fixed disk 1 from both sides to prevent the fixed disk 1 from rotating, thereby completing the auxiliary parking.

[0034] The return spring 5 is installed in the sealed cavity 8. One end of the return spring 5 is fixedly connected to the retaining ring 6, and the other end is fixedly connected to the clamping part 4. By setting the return spring 5, after the gas in the sealed cavity 8 is discharged before the truck starts, the clamping part 4 can be reset by the return spring 5 to prevent the clamping part 4 from contacting the fixed disk 1.

[0035] During specific use: When the truck needs to park, first stop the truck by the handbrake of the truck. After the truck stops, fill high-pressure gas into the sealed cavity 8. The high-pressure gas pushes the two clamping parts 4 to move towards the fixed disk 1 and clamp the fixed disk 1 from both sides, thereby preventing the fixed disk 1 from rotating, and further achieving the purpose of auxiliary parking, which can effectively prevent the truck from rolling and improve safety. When the truck needs to start, first discharge the high-pressure gas in the sealed cavity 8. Under the action of the return spring 5, the two clamping parts 4 are reset to release the auxiliary parking. Then release the handbrake of the truck to start the truck.

[0036] As an implementation manner, the clamping part 4 includes a first connecting cylinder 41 and a clamping disc 42. One end of the first connecting cylinder 41 is fixedly connected to the clamping disc 42. A first mounting hole 421 for the output shaft 7 of the transmission to pass through is provided at the center of the clamping disc 42. The aperture of the first mounting hole 421 is larger than the diameter of the output shaft 7 of the transmission. The first connecting cylinder 41 is sleeved on the guiding cylinder 3, and a sliding and sealing connection is provided between the first connecting cylinder 41 and both the housing 2 and the guiding cylinder 3. As an implementation manner, the cross-section of the inner hole of the first connecting cylinder 41 is quadrilateral, and an arc chamfer is provided at the connection of the quadrilateral; the guiding cylinder 3 has a shape adapted to the inner hole of the first connecting cylinder 41, so that the first connecting cylinder 41 can be prevented from rotating relative to the guiding cylinder 3. One end of the return spring 5 is fixedly connected to the retaining ring 6 by welding, and the other end is fixedly connected to the first connecting cylinder 41 by welding.

[0037] A first groove 411 and a second groove 412 are provided on the outer side wall of the first connecting cylinder 41 along its circumferential direction. Lubricating grease is placed in the first groove 411, and a first sealing ring is provided in the second groove 412; a third groove 413 and a fourth groove 414 are provided on the inner side wall of the first connecting cylinder 41 along its circumferential direction. Lubricating grease is placed in the third groove 413, and a second sealing ring is provided in the fourth groove 414. By increasing the lubricating grease, the friction between the clamping part 4 and the housing 2 and the guiding cylinder 3 can be reduced.

[0038] To further improve the sealing effect; both the second groove 412 and the fourth groove 414 are multiple.

[0039] The first groove 411 is provided on the side of the first connecting cylinder 41 close to the fixed disc 1. In this way, the lubricating grease in the first groove 411 can be prevented from entering the sealing cavity 8.

[0040] To increase the friction between the clamping disc 42 and the fixed disc 1, thereby increasing the fixing effect on the fixed disc 1, anti-slip lines 9 are provided on the side of the clamping disc 42 close to the fixed disc 1.

[0041] To facilitate the supply of high-pressure gas to the sealing cavity 8, the following method is adopted: a first ventilation hole 10 communicating with the sealing cavity 8 is provided on the housing 2. The first ventilation hole 10 is connected to a three-way three-position valve through a supply pipe, and one outlet of the three-way three-position valve is connected to a high-pressure gas supply source. During use, the three-way three-position valve connects the high-pressure gas supply source with the first ventilation hole 10, so as to supply high-pressure gas into the sealing cavity 8. When the two clamping discs 42 are clamped on both sides of the fixed disc 1, the three-way three-position valve is closed (that is, all three outlets are not connected); when it is necessary to discharge the high-pressure gas in the sealing cavity 8, the three-way three-position valve connects the first ventilation hole 10 with the outside air, and the high-pressure gas supply source is not connected to the outside air, so as to discharge the high-pressure gas in the sealing cavity 8.

[0042] As an implementation manner, an air storage tank 11 is provided on the housing 2, and the first ventilation hole 10 is communicated with the air storage tank 11; a second ventilation hole is provided on the air storage tank 11, and the second ventilation hole is connected to a high-pressure air supply source through a three-position three-way valve. By providing the air storage tank 11, the thrust of the high-pressure gas in the two sealing cavities 8 on the clamping disc 42 can be made the same, and it is easier to control the clamping force of the two clamping discs 42 on the fixed disc 1.

[0043] For convenient installation, one of the retaining rings 6 can be fixedly connected to the housing 2 by screws, and a sealing gasket is provided at the connection between the retaining ring 6 and the housing 2.

[0044] The structure, features and function effects of the present invention have been described in detail based on the embodiments shown in the drawings above. The above are only the preferred embodiments of the present invention, but the present invention is not limited to the scope defined by the drawings. Any changes made according to the concept of the present invention, or equivalent embodiments modified into equivalent changes, shall still be within the protection scope of the present invention when they do not exceed the spirit covered by the specification and the drawings.

Claims

1. A parking assist device for a freight vehicle, characterized in that: It includes a fixed disk (1), a housing (2), a guide cylinder (3), a clamping part (4) and a return spring (5); The fixed disk (1) is fixedly installed on the output shaft (7) of the gearbox; The housing (2) is sleeved on the fixed disk (1), and the housing (2) is fixedly connected to the outer shell of the gearbox; Snap rings (6) are fixedly provided at both ends of the housing (2); The guide cylinder (3) is arranged in the housing (2), there are two guide cylinders (3), and the two guide cylinders (3) are respectively located on both sides of the fixed disk (1); The guide cylinder (3) is sleeved on the output shaft (7), and one end of the guide cylinder (3) is fixedly connected to the snap ring (6) on the corresponding side; An installation groove is formed between the guide cylinder (3) and the housing (2); There are two clamping parts (4), and the two clamping parts (4) are respectively slidably installed in the installation groove, and the clamping parts (4) are fixed in the circumferential direction of the guide cylinder (3); The clamping part (4) is hermetically connected to both the housing (2) and the guide cylinder (3); A sealing cavity (8) capable of filling high-pressure gas is formed between the clamping part (4) and the snap ring (6) on the corresponding side; The return spring (5) is installed in the sealing cavity (8), one end of the return spring (5) is fixedly connected to the snap ring (6), and the other end is fixedly connected to the clamping part (4).

2. The parking assistance device for a freight vehicle according to claim 1, wherein: The clamping part (4) includes a first connecting cylinder (41) and a clamping disk (42), one end of the first connecting cylinder (41) is fixedly connected to the clamping disk (42), and a first installation hole (421) for the output shaft (7) to pass through is opened at the center of the clamping disk (42), the first connecting cylinder (41) is sleeved on the guide cylinder (3), and the first connecting cylinder (41) is slidably and hermetically connected to both the housing (2) and the guide cylinder (3); One end of the return spring (5) is fixedly connected to the snap ring (6), and the other end is fixedly connected to the first connecting cylinder (41).

3. The parking assist device for a freight vehicle according to claim 2, characterized in that: A first groove (411) and a second groove (412) are formed on the outer side wall of the first connecting cylinder (41) along its circumferential direction, lubricating grease is placed in the first groove (411), and a first sealing ring is provided in the second groove (412); A third groove (413) and a fourth groove (414) are formed on the inner side wall of the first connecting cylinder (41) along its circumferential direction, lubricating grease is placed in the third groove (413), and a second sealing ring is provided in the fourth groove (414).

4. The parking assist device for a freight vehicle according to claim 3, characterized in that: Both the second groove (412) and the fourth groove (414) are multiple.

5. The parking assist device for a freight vehicle according to claim 3, characterized in that: The first groove (411) is arranged on the side of the first connecting cylinder (41) close to the fixed disk (1).

6. The parking assist device for a freight vehicle according to claim 2, characterized in that: Anti-slip lines (9) are provided on the side of the clamping disk (42) close to the fixed disk (1).

7. The parking assistance device for a freight vehicle according to claim 2, characterized in that: The cross-section of the inner hole of the first connecting cylinder (41) is quadrilateral, and chamfers are provided at the joints of the quadrilateral; The guide cylinder (3) has a shape adapted to the inner hole of the first connecting cylinder (41).

8. The parking assist device for a freight vehicle according to claim 1, characterized in that: A first vent hole (10) communicating with the sealing cavity (8) is formed in the housing (2), and the first vent hole (10) is connected to a high-pressure gas supply source through a three-position three-way valve.

9. The parking assist device for a freight vehicle according to claim 8, characterized in that: An air storage tank (11) is provided on the housing (2), and the first vent hole (10) communicates with the air storage tank (11); a second vent hole is provided on the air storage tank (11), and the second vent hole is connected to a high-pressure gas supply source through a three-position three-way valve.

10. The parking assistance device for a freight vehicle according to claim 1, characterized in that: One of the retaining rings (6) is fixedly connected to the housing (2) by screws, and a sealing gasket is provided at the connection between the retaining ring (6) and the housing (2).

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