Hydraulic lock structure and cab rear suspension assembly
By designing the torque difference between the active lock hook and the driven lock hook in the hydraulic lock structure, the gapless engaging between the lock bolt and the driven lock hook is achieved, solving the abnormal noise problem caused by wear gaps, improving the driving experience and reducing costs.
Patent Information
- Application Number
- CN202421428090.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-21
- Publication Date
- 2025-03-07
- Estimated Expiration
- 2034-06-21
AI Technical Summary
During the use of the existing cab suspension hydraulic lock, abnormal noise is caused by wear between the lock bolt and the driven lock hook, and the wear gap gradually increases, which affects the driving experience.
A hydraulic lock structure is designed, including an active lock hook and a driven lock hook. Through the design of the first torsion spring and the second torsion spring, the torque applied to the driven lock hook by one end of the active lock hook is greater than the torque received by the driven lock hook, ensuring that the driven lock hook is pressed on the lock bolt and achieving gapless closure.
Effectively eliminate the wear gap between the driven lock hook and the lock bolt, reduce abnormal noise, improve driving experience, and achieve good economicality and promotion through the design of the triangular support structure.
Smart Images
Figure CN222572409U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of hydraulic locks, in particular to a hydraulic lock structure and a cab rear suspension assembly. Background Art
[0002] The cab suspension hydraulic lock assembly locks the lock bolt, which is crucial for driving safety and comfort. At the same time, it needs to be opened properly when the cab is lifted. After the existing cab suspension hydraulic lock is locked, the lock bolt is placed in the U-shaped groove of the hydraulic lock, and one end of the active lock hook contacts and abuts against the driven lock hook to ensure that the driven lock hook limits the lock bolt. Since the lock bolt will vibrate up and down and front and back with the cab during the driving process, as the hydraulic lock is used for a longer time, a wear gap will appear between the driven lock hook and the lock bolt. Although it can still ensure that the limit is not invalid, a large abnormal noise will occur, and the wear gap will gradually increase, seriously affecting the driving experience. Utility Model Content
[0003] The problem to be solved by the utility model is to provide a hydraulic lock structure and a cab rear suspension assembly, which can automatically eliminate the wear gap between the driven lock hook and the lock bolt and reduce the generation of abnormal noise.
[0004] In order to solve the above technical problems, the utility model provides a hydraulic lock structure, including an active lock hook that can rotate around a first pin shaft and a driven lock hook that can rotate around a second pin shaft; a first torsion spring for positioning the active lock hook is provided on the first pin shaft, and a second torsion spring for positioning the driven lock hook is provided on the second pin shaft;
[0005] After the lock bolt of the cab is in place, the active lock hook rotates to a position where one end contacts and abuts against the driven lock hook under the torsional force of the first torsion spring, and the state of the driven lock hook being engaged with the lock bolt is limited and locked, and the torque applied to the driven lock hook by one end of the active lock hook is greater than the torque of the second torsion spring received by the driven lock hook, so that the driven lock hook is pressed tightly against the lock bolt to achieve gapless engagement.
[0006] In the above-mentioned hydraulic lock structure, when the hydraulic lock structure locks the lock bolt, one end of the active lock hook contacts and resists the driven lock hook, ensuring that the driven lock hook limits the engagement of the lock bolt. At the same time, by designing the torsion of the first torsion spring and the second torsion spring, it is ensured that the torque applied by one end of the active lock hook to the driven lock hook is greater than the torque of the second torsion spring received by the driven lock hook. As a result, when the hydraulic lock structure locks the lock bolt, the driven lock hook will not only be pushed to rotate by the bottom of the lock bolt during the process of the lock bolt falling into place, but also when there is a wear gap between the driven lock hook and the lock bolt, it will be pushed by one end of the active lock hook to further rotate until the driven lock hook is pressed tightly against the lock bolt, effectively compensating for the wear gap, so that it can tightly press the lock bolt, effectively reducing abnormal noise during driving.
[0007] The invention relates to an improvement on the hydraulic lock structure of the utility model, which includes a first plate shell and a second plate shell arranged opposite to each other at an interval, wherein the first pin shaft and the second pin shaft are arranged between the first plate shell and the second plate shell; U-shaped grooves are respectively arranged on the top edges of the first plate shell and the second plate shell, and the two U-shaped grooves are arranged opposite to each other between the first pin shaft and the second pin shaft, for providing a groove cavity for the locking bolt to fall into place.
[0008] The first plate shell and the second plate shell are supporting shells of the hydraulic lock structure, and each component is arranged in the gap between the two plate shells. The active lock hook and the driven lock hook are respectively arranged on both sides of the U-shaped groove.
[0009] Furthermore, an end plate is provided between the ends of the first plate shell and the second plate shell, and the end plate and the lock bolt provide two interference limiting boundaries for the rotation of the driven lock hook.
[0010] Furthermore, the hydraulic lock structure also includes an oil cylinder assembly, which is used to push the other end of the active lock hook to rotate the active lock hook to release the limit lock on the locked bolt state of the driven lock hook.
[0011] Furthermore, when one end of the active lock hook contacts and abuts against the driven lock hook, and the state of the driven lock hook engaging the lock bolt is limitedly locked, a gap is left between the other end of the active lock hook and the end of the push rod of the oil cylinder assembly. This gap allows the active lock hook to rotate further, eliminating the wear gap between the driven lock hook and the lock bolt.
[0012] Furthermore, the two U-shaped grooves are both provided with flanges facing inwards, and a gap is provided between the flanges.
[0013] As another improvement of the hydraulic lock structure of the utility model, the hydraulic lock structure also includes a sensor assembly, which is used for contact sensing with one end of the active lock hook to detect whether the active lock hook releases the limit lock on the lock bolt state of the driven lock hook.
[0014] In order to solve the above technical problems, the utility model provides a cab rear suspension assembly on the other hand, including the above hydraulic lock structure, and also includes a rear suspension lower bracket and a shock absorber. The hydraulic lock structure, the rear suspension lower bracket and the shock absorber are hinged in pairs to form a triangular support structure.
[0015] In summary, by adopting the above-mentioned hydraulic lock structure and cab rear suspension assembly, the hydraulic lock structure has the function of automatically compensating for the wear gap between the driven lock hook and the lock bolt, and the abnormal noise during driving is low; and the hydraulic lock structure constitutes a three-section arm structure rear suspension assembly, which has strong promotional potential, controllable cost and good economy. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] In the attached picture:
[0017] Figure 1 This is a schematic diagram of the hydraulic lock structure of the utility model after unlocking.
[0018] Figure 2 This is a schematic diagram of the hydraulic lock structure of the utility model after locking.
[0019] Figure 3 This is a structural diagram of the rear suspension assembly of the cab of the utility model.
[0020] In the figure, 1. active lock hook; 2. driven lock hook; 3. lock bolt; 41. first plate shell; 42. second plate shell; 43. U-shaped groove; 44. end plate; 51. first pin shaft; 52. second pin shaft; 6. cylinder assembly; 7. sensor assembly; 81. first torsion spring; 82. second torsion spring; 91. rear suspension lower bracket; 92. shock absorber. DETAILED DESCRIPTION
[0021] The specific implementation modes of the present invention are further described below in conjunction with the accompanying drawings. It should be noted that the description of these implementation modes is used to help understand the present invention, but does not constitute a limitation of the present invention.
[0022] Example 1
[0023] Figure 1-3 The utility model shows a hydraulic lock structure. Figure 1-3 As shown, the hydraulic lock structure includes an active lock hook 1 that can rotate around a first pin shaft 51 and a driven lock hook 2 that can rotate around a second pin shaft 52; a first torsion spring 81 for positioning the active lock hook 1 is provided on the first pin shaft 51, and a second torsion spring 82 for positioning the driven lock hook 2 is provided on the second pin shaft 52;
[0024] After the lock bolt 3 of the cab is in place, the active lock hook 1 rotates to a position where one end contacts and abuts against the driven lock hook 2 under the torsion of the first torsion spring 81, and the state of the driven lock hook 2 engaging with the lock bolt 3 is limited and locked, and the torque applied by one end of the active lock hook 1 to the driven lock hook 2 is greater than the torque of the second torsion spring 82 received by the driven lock hook 2, so that the driven lock hook 2 is tightly pressed against the lock bolt 3 to achieve gapless engagement.
[0025] In some embodiments, the hydraulic lock structure also includes a first plate shell 41 and a second plate shell 42 that are arranged opposite to each other at intervals, and a first pin shaft 51 and a second pin shaft 52 are arranged between the first plate shell 41 and the second plate shell 42; U-shaped grooves 43 are respectively arranged on the top edges of the first plate shell 41 and the second plate shell 42, and the two U-shaped grooves 43 are arranged opposite to each other between the first pin shaft 51 and the second pin shaft 52, so as to provide a groove cavity for the locking bolt 3 to fall into place.
[0026] In some embodiments, an end plate 44 is disposed between the ends of the first plate shell 41 and the second plate shell 42 , and the end plate 44 and the lock bolt 3 provide two interference limiting boundaries for the rotation of the driven lock hook 2 .
[0027] In some embodiments, a cylinder assembly 6 is further included, and the cylinder assembly 6 is used to push the other end of the active lock hook 1 to rotate the active lock hook 1 to release the limit lock on the state of the driven lock hook 2 engaging the lock bolt 3.
[0028] In some embodiments, when one end of the active lock hook 1 contacts and abuts against the driven lock hook 2, and the state of the driven lock hook 2 engaging the lock bolt 3 is limited and locked, a gap is left between the other end of the active lock hook 1 and the push rod end of the cylinder assembly 6.
[0029] In some embodiments, both U-shaped grooves 43 are provided with flanges facing inward, and a gap is provided between the flanges.
[0030] In some embodiments, the hydraulic lock structure further includes a sensor assembly 7, which is used for contact sensing with one end of the active lock hook 1 to detect whether the active lock hook 1 releases the limit lock on the state of the driven lock hook 2 engaging the lock bolt 3.
[0031] In some embodiments, the active locking hook 1 is in the shape of an inclined and inverted ingot-shaped plate, and the middle part is rotatably disposed on the first pin shaft 51 .
[0032] In some embodiments, the driven lock hook 2 is in the shape of a hook-shaped plate with the hook mouth facing upward, and the bottom is rotatably arranged on the second pin shaft 52. The inner side surface of the hook handle plate is provided with a sliding surface that can slide in contact with one end of the active lock hook 1.
[0033] like Figure 1 and Figure 2As shown, in the process of one end of the active lock hook 1 sliding from the bottom end to the top end on the sliding surface, it can push the driven lock hook 2 to rotate in the direction of the lock bolt, but due to the interference limit of the lock bolt 3, one end of the active lock hook 1 cannot slide directly to the top end, but stops at a place on the sliding surface, and the driven lock hook 2 and the lock bolt 3 are limited and locked in the engaged state.
[0034] When designing, a brand new hydraulic lock structure has no wear gap between the driven lock hook 2 and the lock bolt 3. The wear gap mainly refers to the wear between the side and top of the lock bolt 3 and the contact part of the driven lock hook 2 due to vibration. The bottom of the lock bolt 3 contacts the bottom surface of the U-shaped groove 43, so the wear between the bottom and the driven lock hook 2 is relatively small. As the use time increases, when a wear gap appears between the driven lock hook 2 and the lock bolt 3, since the torque of the active lock hook 1 on one end of the driven lock hook 2 is greater, the active lock hook 1 and the driven lock hook 2 will both rotate toward the lock bolt 3. The rotation of the driven lock hook 2 eliminates the wear gap and keeps the lock bolt 3 pressed. The rotation of the active lock hook 1 adjusts the position of one end of itself on the sliding surface of the driven lock hook 2 upwards, reaches the new position again, and continues to limit the engagement state of the driven lock hook 2 and the lock bolt 3.
[0035] When using, Figure 1-3 The hydraulic lock structure shown is described. When unlocking, the piston rod of the oil cylinder assembly 6 is acted upon by the oil pressure, overcoming the force of the first torsion spring 81 of the active lock hook 1 and pushing upward, giving the active lock hook 1 a pushing force, and the active lock hook 1 rotates counterclockwise around the first pin 51, and one end of the active lock hook 1 close to the lock bolt slides out from the sliding surface of the driven lock hook 2 until it rotates and contacts the contact of the sensor assembly 7, the sensor is turned on, stops rotating, and a locking alarm is displayed on the cab instrument, indicating that the hydraulic lock assembly is in the open state. At this time, the lock bolt 3 can be moved out of the U-shaped groove 43, and while moving out, the driven lock hook 2 rotates around the second pin 52 under the action of the second torsion spring 82, rotates counterclockwise, and after rotating to the maximum angle, it is limited by the end plate 44 and stops rotating. After the locking bolt 3 is moved out, the piston rod of the control cylinder assembly 6 is retracted, and the active locking hook 1 will rotate clockwise to the maximum angle under the reset force of the first torsion spring 81, and will be limited to stop rotating, which may be the flange with the U-shaped groove 43.
[0036] When locking, the lock bolt 3 applies downward pressure to the driven lock hook 2, so that the driven lock hook 2 overcomes the torsion of the second torsion spring 82 and rotates clockwise around the second pin shaft 52. At the same time, the end of the driven lock hook 2 close to the lock bolt will slide on the active lock hook 1 and push the active lock hook 1 to rotate counterclockwise until the lock bolt 3 falls to the bottom of the U-shaped groove 43. That is, when the landing is completed, the end of the driven lock hook 2 is separated from the active lock hook 1 to the bottom. At this time, there is no oil pressure in the cylinder assembly 6, and the piston rod has no push-out force. The active lock hook 1 rotates clockwise under the action of the torsion spring force. After rotating to the limit position on the sliding surface of the driven lock hook 2, it cannot rotate further clockwise due to the limiting resistance of the physical structure. At this time, there is still a certain compensation gap between the active lock hook 1 and the push rod of the cylinder assembly 6. In this way, the active lock hook 1 exerts a force on the driven lock hook 2, so that the driven lock hook 2 buckles the lock bolt 3. When the lock bolt 3 and the lock groove are worn, the torsion force exerted by the active lock hook 1 on the driven lock hook 2 causes it to further move clockwise. The active lock hook 1 also moves clockwise under the action of the torsion spring force. The active lock hook 1 and the driven lock hook 2 reach a new contact and abutment state. At this time, the wear gap is eliminated. When the hydraulic lock assembly is in the locked position, the push rod of the sensor assembly 7 does not contact the active lock hook 1, and at this time, no locking alarm is generated.
[0037] Example 2
[0038] Figure 3 The utility model shows a cab rear suspension assembly. Figure 3 As shown, the cab rear suspension assembly includes the above-mentioned hydraulic lock structure, and also includes a rear suspension lower bracket 91 and a shock absorber 92. The hydraulic lock structure, the rear suspension lower bracket 91 and the shock absorber 92 are hinged in pairs to form a triangular support structure.
[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit its protection scope. Although the utility model is described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that after reading the utility model, those skilled in the art can still make various changes, modifications or equivalent substitutions to the specific implementation methods of the utility model, but these changes, modifications or equivalent substitutions are all within the protection scope of the pending claims of the utility model.
Claims
1. A hydraulic lock structure, characterized in that: The invention comprises an active lock hook (1) capable of rotating around a first pin shaft (51) and a driven lock hook (2) capable of rotating around a second pin shaft (52); a first torsion spring (81) for positioning the active lock hook (1) is arranged on the first pin shaft (51), and a second torsion spring (82) for positioning the driven lock hook (2) is arranged on the second pin shaft (52); After the lock bolt (3) of the cab is in place, the active lock hook (1) rotates to a position where one end contacts and abuts against the driven lock hook (2) under the torsion force of the first torsion spring (81), and the state of the driven lock hook (2) being engaged with the lock bolt (3) is limitedly locked, and the torque applied by one end of the active lock hook (1) to the driven lock hook (2) is greater than the torque of the second torsion spring (82) applied to the driven lock hook (2), so that the driven lock hook (2) is pressed tightly against the lock bolt (3) to achieve gapless engagement.
2. A hydraulic lock structure according to claim 1, characterized in that: It also includes a first plate shell (41) and a second plate shell (42) which are arranged opposite to each other and spaced apart, and the first pin shaft (51) and the second pin shaft (52) are arranged between the first plate shell (41) and the second plate shell (42); U-shaped grooves (43) are respectively arranged on the top edges of the first plate shell (41) and the second plate shell (42), and the two U-shaped grooves (43) are arranged opposite to each other between the first pin shaft (51) and the second pin shaft (52) to provide a groove cavity for the locking bolt (3) to fall into place.
3. A hydraulic lock structure according to claim 2, characterized in that: An end plate (44) is provided between the ends of the first plate shell (41) and the second plate shell (42), and the end plate (44) and the lock bolt (3) provide two interference limit boundaries for the rotation of the driven lock hook (2).
4. A hydraulic lock structure according to claim 2, characterized in that: It also includes an oil cylinder assembly (6), which is used to push the other end of the active lock hook (1) so that the active lock hook (1) rotates to release the limit lock on the state of the driven lock hook (2) being engaged with the lock bolt (3).
5. A hydraulic lock structure according to claim 4, characterized in that: When one end of the active lock hook (1) contacts and abuts against the driven lock hook (2), and the state of the driven lock hook (2) being engaged with the lock bolt (3) is limitedly locked, a gap is left between the other end of the active lock hook (1) and the end of the push rod of the cylinder assembly (6).
6. A hydraulic lock structure according to claim 2, characterized in that: The two U-shaped grooves (43) are both provided with flanges facing inwards, and a gap is provided between the flanges.
7. A hydraulic lock structure according to claim 1, characterized in that: It also includes a sensor assembly (7), which is used for contact sensing with one end of the active lock hook (1) to detect whether the active lock hook (1) releases the limit lock of the state of the driven lock hook (2) engaging the lock bolt (3).
8. A hydraulic lock structure according to claim 1, characterized in that: The active locking hook (1) is in the shape of an inclined inverted ingot-shaped plate, and the middle part is rotatably arranged on the first pin shaft (51).
9. A hydraulic lock structure according to claim 1, characterized in that: The driven lock hook (2) is in the shape of a hook-shaped plate with the hook opening facing upwards, and the bottom is rotatably arranged on the second pin shaft (52). The inner side surface of the hook handle plate is provided with a sliding surface capable of slidingly contacting and abutting against one end of the active lock hook (1).
10. A cab rear suspension assembly, characterized in that: The hydraulic lock structure comprises the hydraulic lock structure as claimed in any one of claims 1 to 9, and further comprises a rear suspension lower bracket (91) and a shock absorber (92), wherein the hydraulic lock structure, the rear suspension lower bracket (91) and the shock absorber (92) are hinged in pairs to form a triangular support structure.