A shock absorbing device for a diesel engine set of a vehicle power unit

Abstract

The present invention relates to the technical field of electric power equipment, and discloses a shock absorbing device for a diesel engine set of a vehicle-mounted power unit, comprising a chassis, a diesel engine set arranged on the chassis, and a damping device in contact with or connected to the diesel engine set, wherein the damping device is arranged at the front and rear ends of the diesel engine set in the direction of vehicle travel. The present invention solves the problems of poor shock absorbing effect and low reliability existing in the prior art.

Description

Technical Field

[0001] The invention relates to the technical field of electric power equipment, in particular to a shock absorbing device for a diesel engine set of a vehicle-mounted power unit. Background Art

[0002] The power unit is an energy conversion device, and diesel is the raw material. It uses the diesel engine as the power to drive the generator to generate electricity. When the diesel engine is working, the reciprocating motion of the engine piston connecting rod mechanism and the periodic torque formed when the torque is output cause the coupled vibration of the diesel unit and the accessories. This vibration is transmitted to the vehicle platform through the chassis, which directly affects the safety of the vehicle platform. At present, rubber pads are generally installed at the bottom of the mounting feet of the diesel unit to achieve the purpose of shock absorption. However, with the development of the unit towards high speed, high power and lightweight, the shock absorption requirements of the diesel unit are also constantly increasing. The existing technology cannot meet the increasingly high shock absorption requirements, and the shock absorption effect is poor and the reliability is not strong. Summary of the invention

[0003] In order to overcome the deficiencies of the prior art, the present invention provides a shock absorbing device for a vehicle-mounted power unit diesel engine set, which solves the problems of poor shock absorbing effect and low reliability in the prior art.

[0004] The technical solution adopted by the present invention to solve the above problems is:

[0005] A shock absorbing device for a diesel engine set of a vehicle power unit comprises a chassis, a diesel engine set arranged on the chassis, and a damping device in contact with or connected to the diesel engine set. The damping device is arranged at the front and rear ends of the diesel engine set in the direction of vehicle travel.

[0006] As a preferred technical solution, the diesel engine unit includes a diesel engine and a generator connected to each other, and the damping device includes shock-absorbing damping I and shock-absorbing damping II. Shock-absorbing damping I is in contact with or connected to the part of the diesel engine close to the generator, and shock-absorbing damping II is in contact with or connected to the part of the diesel engine far from the generator.

[0007] As a preferred technical solution, it also includes mounting feet I, mounting feet II, damping bracket I, and damping bracket II connected to the chassis, the two ends of the shock-absorbing damper I are respectively connected to the mounting feet I and the damping bracket I, the mounting feet I is firmly connected to the part of the diesel engine close to the generator, the two ends of the shock-absorbing damper II are respectively connected to the mounting feet II and the damping bracket II, and the mounting feet II is firmly connected to the part of the diesel engine far from the generator.

[0008] As a preferred technical solution, it also includes a shock-absorbing pad, which is arranged between the mounting foot I and the chassis, and / or the shock-absorbing pad is arranged between the mounting foot II and the chassis.

[0009] As a preferred technical solution, the shock-absorbing pad is a rubber pad.

[0010] As a preferred technical solution, it also includes a tooling pressure plate connected to the shock absorbing damper I, and the tooling pressure plate is connected with an adjusting nut and an adjusting screw that cooperate with each other.

[0011] As a preferred technical solution, it also includes a hinge structure, and the shock absorbing damper I is hingedly connected to the mounting foot I through the hinge structure.

[0012] As a preferred technical solution, the hinge structure includes a double earring, a hole-making bolt passing through the double earring, and a hole-making nut matching the hole-making bolt.

[0013] As a preferred technical solution, the shock-absorbing damping I includes a damping spring, the damping spring sleeve is provided with a bearing sleeve, the bearing sleeve is provided with a rod-end joint bearing, one end of the rod-end joint bearing is connected to the mounting foot I, the other end of the rod-end joint bearing is provided with a spring base, the spring base is connected to the damping bracket I, and a shock-absorbing limit spring is provided between the other end of the rod-end joint bearing and the spring base.

[0014] As a preferred technical solution, the shock-absorbing limit spring is a disc spring.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] (1) The device of the present invention can alleviate the vibration of the diesel engine in the direction of vehicle travel, reduce noise, and reduce the risk of chassis fatigue damage, thereby improving the shock absorption effect and reliability;

[0017] (2) The present invention sets two groups of shock absorbers installed at different positions, which is conducive to adjusting the vibration caused by different torques at different distances from the generator, has a better shock absorption effect, and is also easy to operate;

[0018] (3) The present invention is conducive to further improving the tightness, and also improves the stability of the device, and further improves the shock absorption effect;

[0019] (4) The anti-vibration pad of the present invention is helpful to reduce the vibration in the vertical direction, thereby further improving the shock absorption effect;

[0020] (5) The rubber cushion of the present invention has good shock absorption effect and light weight;

[0021] (6) The present invention facilitates timely and convenient adjustment of the resistance capacity of the shock absorption damping I, thereby adapting to a wider range of scenarios;

[0022] (7) The present invention facilitates the installation and disassembly of the adjustable shock-absorbing damping I;

[0023] (8) The present invention is easy to operate and saves time and effort during adjustment;

[0024] (9) The present invention further improves the vibration reduction effect, making the diesel engine set vibrate within a controllable range;

[0025] (10) The disc spring of the present invention has high rigidity and better shock absorption effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A schematic structural diagram of a diesel engine unit equipped with a shock absorbing device for a vehicle-mounted power unit diesel engine unit according to the present invention;

[0027] Figure 2 for Figure 1 Side view of

[0028] Figure 3 It is a schematic diagram of the structure of the shock-absorbing pad;

[0029] Figure 4 This is a schematic structural diagram of a shock absorbing device for a diesel engine set in a vehicle power unit according to the present invention;

[0030] Figure 5 for Figure 4 A partial enlarged view of

[0031] Figure 6 for Figure 5 A longitudinal section view of .

[0032] The markings and corresponding parts names in the attached drawings are: 1. Diesel engine set; 3. Chassis; 4. Mounting foot Ⅰ; 5. M12 bolt; 6. Shock absorber Ⅰ; 7. Mounting foot Ⅱ; 8. M14 mounting bolt; 9. Damping bracket Ⅱ; 10. Shock absorber Ⅱ; 11. Shockproof pad; 12. Damping bracket Ⅰ; 13. Bolt for reaming holes; 14. Rod end joint bearing; 15. Locking nut; 16. Pressing nut; 17. Upper spring seat; 18. Damping spring; 19. Piston rod; 20. Shock absorber limit spring; 21. Spring base; 22. Adjusting nut; 23. Nut for reaming holes; 24. Adjusting screw; 25. Tooling pressure plate; 26. Double earrings; 27. Bearing sleeve; 101. Diesel engine; 102. Generator. DETAILED DESCRIPTION

[0033] The present invention will be further described in detail below in conjunction with embodiments and drawings, but the embodiments of the present invention are not limited thereto.

[0034] Example 1

[0035] like Figures 1 to 6As shown, a shock absorbing device of a vehicle-mounted power unit diesel engine group includes a chassis 3, a diesel engine group 1 arranged on the chassis 3, and a damping device in contact with or connected to the diesel engine group 1, wherein the damping device is arranged at the front and rear ends of the diesel engine group 1 in the direction of vehicle travel.

[0036] The device of the present invention can alleviate the vibration of the diesel engine set 1 in the direction of vehicle travel, reduce noise, and reduce the risk of fatigue damage to the chassis 3, thereby improving the shock absorption effect and reliability.

[0037] As a preferred technical solution, the diesel engine unit 1 includes a diesel engine 101 and a generator 102 which are connected to each other, and the damping device includes a shock-absorbing damper I6 and a shock-absorbing damper II10. The shock-absorbing damper I6 is in contact with or connected to the part of the diesel engine 101 close to the generator 102, and the shock-absorbing damper II10 is in contact with or connected to the part of the diesel engine 101 away from the generator 102.

[0038] Two sets of shock-absorbing dampers are arranged at different positions, which is helpful to adjust the vibration caused by different torques at different distances from the generator 102, and has better shock-absorbing effect and is easy to operate.

[0039] As a preferred technical solution, it also includes mounting feet I4, mounting feet II7, damping bracket I12, and damping bracket II9 connected to the chassis 3, the two ends of the shock absorber damper I6 are respectively connected to the mounting feet I4 and the damping bracket I12, the mounting feet I4 is tightly connected to the part of the diesel engine 101 close to the generator 102, the two ends of the shock absorber damper II10 are respectively connected to the mounting feet II7 and the damping bracket II9, and the mounting feet II7 is tightly connected to the part of the diesel engine 101 away from the generator 102.

[0040] It is beneficial to further improve the tightness, improve the stability of the device, and further improve the shock absorption effect.

[0041] As a preferred technical solution, it also includes a shock-absorbing pad 11, which is arranged between the mounting foot Ⅰ4 and the chassis 3, and / or the shock-absorbing pad 11 is arranged between the mounting foot Ⅱ7 and the chassis 3.

[0042] The anti-vibration pad 11 is helpful to reduce the vibration in the vertical direction, thereby further improving the shock absorption effect.

[0043] As a preferred technical solution, the shock-absorbing pad 11 is a rubber pad.

[0044] The rubber cushion has good shock absorption effect and is lightweight.

[0045] Example 2

[0046] like Figures 1 to 6As shown, as a further optimization of Example 1, this embodiment includes all the technical features of Example 1. In addition, this embodiment also includes the following technical features:

[0047] As a preferred technical solution, it also includes a tooling pressure plate 25 connected to the shock absorbing damper Ⅰ6, and the tooling pressure plate 25 is connected with an adjusting nut 22 and an adjusting screw 24 that cooperate with each other.

[0048] This makes it easy to adjust the resistance of the shock absorber I6 in a timely and convenient manner, so that it can adapt to a wider range of scenarios.

[0049] As a preferred technical solution, a hinge structure is also included, and the shock absorbing damper Ⅰ6 is hingedly connected to the mounting foot Ⅰ4 through the hinge structure.

[0050] This facilitates the installation and removal of the adjustable shock absorber Ⅰ6.

[0051] As a preferred technical solution, the hinge structure includes a double earring 26 , a hole-making bolt 13 through which the double earring 26 is passed, and a hole-making nut 23 matching the hole-making bolt 13 .

[0052] This structure is easy to operate and saves time and effort during adjustment.

[0053] As a preferred technical solution, the shock-absorbing damping Ⅰ6 includes a damping spring 18, the damping spring 18 is sleeved with a bearing sleeve 27, the bearing sleeve 27 is sleeved with a rod end joint bearing 14, one end of the rod end joint bearing 14 is connected to the mounting foot Ⅰ4, the other end of the rod end joint bearing 14 is provided with a spring base 21, the spring base 21 is connected to the damping bracket Ⅰ12, and a shock-absorbing limit spring 20 is provided between the other end of the rod end joint bearing 14 and the spring base 21.

[0054] This further improves the vibration-absorbing effect and makes the diesel engine unit 1 vibrate within a controllable range.

[0055] As a preferred technical solution, the damping limit spring 20 is a disc spring.

[0056] The disc spring has greater rigidity and better shock absorption effect.

[0057] Example 3

[0058] like Figures 1 to 6 As shown, this embodiment includes all the technical features of Embodiment 1 and Embodiment 2. Based on Embodiment 1 and Embodiment 2, this embodiment provides a more detailed implementation method.

[0059] The present invention can effectively absorb the vibration of the diesel engine set 1 during operation, especially the vibration when the diesel engine set 1 is started or stopped.

[0060] The present invention is composed of a chassis 3, four rubber pads (shockproof pads 11), two groups of shock absorbers (shock absorber I6, shock absorber II10) and damping brackets (damping bracket I12, damping bracket II9), etc. The four rubber pads are respectively placed at the bottom of the mounting feet (mounting feet I4, mounting feet II7) of the diesel engine unit 1, and the rubber pads can reduce vibration and impact from the engine and the road surface. The center of gravity of the diesel engine unit 1 is relatively high. Operations such as braking and acceleration during driving, as well as the unbalanced inertia force and torque of the diesel engine will cause the diesel engine unit 1 to vibrate in the direction of vehicle travel. For the vibration in the direction of vehicle travel, the rubber cushion can only absorb the vibration and impact in the vertical direction, and cannot alleviate the vibration in the direction of vehicle travel. Therefore, two sets of shock absorbers and dampers are designed and arranged on the front and rear sides of the diesel engine unit 1 in the direction of vehicle travel. After the two sets of shock absorbers and dampers are installed in the predetermined positions, the axis thereof passes through the center of gravity of the diesel engine. One end of the shock absorber and damper is connected to the diesel engine, and the other end is fixed to the damping bracket. Then the damping bracket is connected to the chassis 3 with bolts. The stiffness of the shock absorber and damper is proportional to the vibration amplitude of the engine.

[0061] Under the deadweight of diesel unit 1, the compression of rubber cushion is half of its maximum compression, and the rubber cushion can be selected. The chassis 3 of the power unit is lightweight, and the material is 6061 aluminum alloy. The overall rigidity of chassis 3 is worse than that of steel base. In order to improve the rigidity of chassis 3 and reduce the influence of low-frequency vibration of diesel unit 1 on chassis 3, 2 groups of shock absorbers and 2 damping brackets are designed with comprehensive consideration. Before design, the power unit was subjected to vibration test. During the test, the power unit was in working state. The vibration amount (amplitude, speed and acceleration) in three directions of the vertical direction and the vehicle travel direction of the shock absorber installation position of diesel unit 1 was measured, which was used as the basis for designing shock absorbers.

[0062] When the diesel engine 1 vibrates, it will tilt forward and backward around the center of gravity in the driving direction. The two sets of shock absorbers are installed symmetrically, and the central axis of the dampers passes through the center of gravity of the diesel engine 1 during installation. The shock absorber is designed with two springs of different stiffness, which are used in combination to form a combined shock absorber. The spring with smaller stiffness (damping spring 18) first participates in shock absorption to reduce the acceleration of the diesel engine 1 tilting. After it drops to a certain level, the disc spring with larger stiffness (shock absorber limit spring 20) participates in the work to further reduce the speed of the diesel engine 1 until it reaches zero, so that the diesel engine 1 vibrates within a controllable range.

[0063] The device of the present invention can alleviate the vibration of the diesel engine set 1 in the vertical direction and the front-rear direction, reduce the noise, and the rigid damping bracket can improve the overall rigidity of the chassis 3 and reduce the risk of fatigue damage of the chassis 3.

[0064] The following is a detailed description of the implementation of the shock absorbing device in conjunction with the accompanying drawings. Figure 4, damping bracket I is fixed to the crossbeam of chassis 3 with 8 M14 bolts, and damping bracket II is fixed to the crossbeam of chassis 3 with 12 M14 bolts (M14 mounting bolts 8); see Figure 6 , fix the shock absorber I diagonally on the damping bracket I with two M12 bolts 5, and pass the two adjusting screws 24 through the remaining two mounting holes on the back of the shock absorber mounting plate. The tooling pressure plate 25 is pressed on the upper spring seat 17 of the shock absorber. The adjusting screw 24 passes through the tooling pressure plate 25, and then screw on the adjusting nut 22 to press the tooling pressure plate 25. The adjusting nut 22 is rotated in the tightening direction to compress the spring of the shock absorber to the specified height, and then tighten the clamping nut 16 to the specified torque. After completion, remove the adjusting nut 22, the adjusting screw 24 and the tooling pressure plate 25, and then use the M12 bolts 5 to fix the shock absorber at the corresponding position; install another shock absorber I in the same way; install the two shock absorbers II on the damping bracket II in the same way.

[0065] See Figure 1 Two mounting feet Ⅰ and two mounting feet Ⅱ are fixed on the diesel unit 1. Rubber pads are respectively arranged at the bottom of the four mounting feet. Then the diesel unit 1 and the rubber pads are placed on the damping bracket. Four M16 bolts are inserted from the mounting holes of the mounting feet, through the center holes of the rubber pads, the damping bracket and the chassis 3 crossbeam. The M16 nuts are matched with the bolts from the bottom of the chassis 3 crossbeam and tightened to the specified torque.

[0066] See Figure 6 , by rotating the rod end joint bearing 14, adjusting the extension length and angle of the rod end joint bearing 14, aligning the mounting hole on the rod end joint bearing 14 with the mounting hole of the double earring 26 on the mounting bracket, passing the M14 reaming hole bolt 13, and then fixing the M14 reaming hole bolt 13 with the M14 reaming hole nut 23, after the rod end joint bearing 14 is docked, tighten the locking nut 15 to the specified torque to prevent the thread of the rod end bearing from loosening, and install other shock-absorbing and damping rod end joint bearings 14 in place in the same way. At this point, the shock-absorbing device of the diesel unit 1 is installed.

[0067] As described above, the present invention can be preferably implemented.

[0068] All features disclosed in all embodiments in this specification, or steps in all methods or processes implicitly disclosed, except for mutually exclusive features and / or steps, can be combined and / or expanded or replaced in any manner.

[0069] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. According to the technical essence of the present invention, within the spirit and principles of the present invention, any simple modification, equivalent replacement and improvement made to the above embodiment still falls within the protection scope of the technical solution of the present invention.

Claims

1. A shock absorbing device for a vehicle-mounted power unit diesel engine, characterized in that: It comprises a chassis (3), a diesel engine unit (1) arranged on the chassis (3), and a damping device in contact with or connected to the diesel engine unit (1), wherein the damping device is arranged at the front and rear ends of the diesel engine unit (1) in the direction of vehicle travel; The diesel engine set (1) comprises a diesel engine (101) and a generator (102) which are connected to each other, and the damping device comprises a shock absorbing damper I (6) and a shock absorbing damper II (10), wherein the shock absorbing damper I (6) is in contact with or connected to a portion of the diesel engine (101) close to the generator (102), and the shock absorbing damper II (10) is in contact with or connected to a portion of the diesel engine (101) far from the generator (102), and the shock absorbing damper I (6) and the shock absorbing damper II (10) are symmetrically installed; It also includes a mounting foot I (4), a mounting foot II (7), a damping bracket I (12), and a damping bracket II (9) connected to the chassis (3); the two ends of the shock absorber damper I (6) are respectively connected to the mounting foot I (4) and the damping bracket I (12); the mounting foot I (4) is firmly connected to a portion of the diesel engine (101) close to the generator (102); the two ends of the shock absorber damper II (10) are respectively connected to the mounting foot II (7) and the damping bracket II (9); the mounting foot II (7) is firmly connected to a portion of the diesel engine (101) far from the generator (102); The shock absorbing damper I (6) comprises a damping spring (18), the damping spring (18) being sleeved with a bearing sleeve (27), the bearing sleeve (27) being sleeved with a rod end joint bearing (14), one end of the rod end joint bearing (14) being connected to the mounting support foot I (4), the other end of the rod end joint bearing (14) being provided with a spring base (21), the spring base (21) being connected to the damping bracket I (12), and a shock absorbing limit spring (20) being provided between the other end of the rod end joint bearing (14) and the spring base (21).

2. A shock absorbing device for a vehicle-mounted power unit diesel engine set according to claim 1, characterized in that: It also includes a shock-absorbing pad (11), wherein the shock-absorbing pad (11) is arranged between the mounting foot I (4) and the chassis (3), and / or the shock-absorbing pad (11) is arranged between the mounting foot II (7) and the chassis (3).

3. A shock absorbing device for a vehicle-mounted power unit diesel engine set according to claim 2, characterized in that: The shockproof pad (11) is a rubber pad.

4. A shock absorbing device for a vehicle-mounted power unit diesel engine set according to claim 3, characterized in that: It also includes a tooling pressure plate (25) connected to the shock absorbing damper I (6), and the tooling pressure plate (25) is connected to an adjusting nut (22) and an adjusting screw (24) that cooperate with each other.

5. A shock absorbing device for a vehicle-mounted power unit diesel engine set according to claim 4, characterized in that: It also includes a hinge structure, and the shock absorbing damper I (6) is hingedly connected to the mounting foot I (4) through the hinge structure.

6. A shock absorbing device for a vehicle-mounted power unit diesel engine set according to claim 5, characterized in that: The hinge structure comprises a double earring (26), a hole-reaming bolt (13) passing through the double earring (26), and a hole-reaming nut (23) matching the hole-reaming bolt (13).

7. A shock absorbing device for a vehicle-mounted power unit diesel engine set according to claim 6, characterized in that: The damping limit spring (20) is a disc spring.

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