Natural gas heavy truck clutch

Abstract

The utility model relates to a natural gas heavy truck clutch, which is characterized in that a heightened space is arranged between a gland and a pressure plate, so that the pressure plate has a larger thickening and weighting space and a larger heat dissipation space; the rotary ventilation grooves are used for conducting heat and ventilating during working, heat dissipation is facilitated, the heat capacity of products is improved, the problem of high temperature caused by insufficient low-rotating-speed torque and high-rotating-speed starting sliding friction power of a natural heavy truck can be solved, sliding friction heat is effectively absorbed, and heat dissipation is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to new energy automobile parts structure design technical field, concretely relates to a natural gas heavy truck clutch. BACKGROUND

[0002] With the rapid popularization of natural gas new energy engine in heavy truck field, its lower operation cost and significant economic advantage promote market penetration rate to continue to rise. The down of LNG price and the perfection of gas station network further improve the practicability and user acceptance of natural gas heavy truck, however, the existing natural gas vehicle still generally uses the clutch product of traditional fuel vehicle, and in actual operation, serious adaptability problem is exposed: natural gas engine causes response lag due to fuel characteristics, power output curve is steep, and problems such as long starting turbo time, high semi-linkage working condition ratio and the like frequently occur in vehicles, which causes the clutch slip work to surge. Especially in short reverse transport child-mother car, high-torque user preference high-grade starting and the like, the existing clutch generally has faults such as short service life, abnormal wear of friction plate, driven disc fracture and gear hanging difficulty, which seriously restricts the market promotion of natural gas heavy truck.

[0003] In-depth analysis shows that the traditional clutch has multiple technical defects in structural design. On the one hand, the outer diameter of the diaphragm spring of the pressure plate assembly and the pressure distribution are not optimized for the high-torque characteristics of the natural gas engine, which causes the local overheating of the friction plate and the risk of slipping to increase; on the other hand, the idle speed damping system lacks low-frequency vibration suppression capability and cannot effectively attenuate the gearbox gear impact and cabin noise caused by engine idle speed resonance. In addition, the heat dissipation efficiency of the friction plate assembly is low, which is difficult to cope with the high heat load generated by frequent semi-linkage, and the limiting gap design between the hub and the disc sleeve further aggravates the torsional abnormal noise. The existing improvement scheme such as double-mass flywheel or multi-stage friction plate layout can partially improve the performance, but it is difficult to meet the lightweight and compactness requirements of heavy trucks due to the increase in weight, excessive axial space occupation or high cost.

[0004] In view of the above-mentioned problems, a clutch assembly system specially designed for natural gas heavy truck is needed. By restructuring the clutch structure, the high-torque bearing capacity is strengthened. UTILITY MODEL CONTENTS

[0005] Based on the above description, the utility model provides a natural gas heavy truck clutch to solve the many technical problems caused by high slip work of the clutch in the prior art.

[0006] The technical solution of the utility model to solve the above technical problems is as follows:

[0007] A natural gas heavy truck clutch, comprising a pressure plate assembly and a driven disc assembly.

[0008] The pressure plate assembly comprises a pressure plate, a cover, a bearing plate and a diaphragm spring, the cover is arranged on the pressure plate, a raised space is arranged between the cover and the pressure plate, the bearing plate is arranged at the middle part of the pressure plate, the inner end of the diaphragm spring is connected to the bearing plate and the outer end is fixed between the pressure plate and the cover, a plurality of rotating ventilation grooves are formed on the side of the pressure plate close to the cover, and a transmission piece group is arranged between the outer edges of the pressure plate and the cover.

[0009] The driven plate assembly comprises a disc core, a disc sleeve, a hub disc, a driven plate, a friction plate assembly and an idle vibration damping system, the disc core, the disc sleeve and the hub disc are coaxially arranged from inside to outside, the driven plate is connected to the outer side of the hub disc, the friction plate assembly is arranged on the side of the driven plate and corresponds to the pressure plate, and the idle vibration damping system is arranged in the inner side of the driven plate.

[0010] Compared with the prior art, the technical scheme has the following beneficial technical effects:

[0011] The natural gas heavy truck clutch provided by the application has the raised space arranged between the cover and the pressure plate, so that the pressure plate has a larger thickening and weighting space and a larger heat dissipation space; the rotating ventilation grooves can guide heat and ventilate during work, so that heat dissipation is facilitated, the heat capacity of the product is improved, the problem of high temperature caused by insufficient low-speed torque and high starting sliding friction power of the natural gas heavy truck can be solved, and the sliding friction heat can be effectively absorbed and dissipated.

[0012] On the basis of the above technical scheme, the utility model can also be improved as follows.

[0013] Further, the height of the raised space is not less than 9mm, and the outer diameter of the diaphragm spring is increased by 10-15mm compared with the outer diameter of the standard heavy truck diaphragm spring.

[0014] Further, the friction plate assembly comprises a plurality of wave-shaped plates and two friction plates, the two friction plates are connected to the two sides of the driven plate, and the plurality of wave-shaped plates are arranged between the two friction plates and on the side of the driven plate away from the pressure plate.

[0015] Further, the wave-shaped plates are connected to the driven plate in a circumferential direction, a plurality of friction protrusions are arranged on the friction plates in a circumferential direction, each wave-shaped plate comprises a first connecting part and a second connecting part for cooperation deformation, a deformation opening is formed between the first connecting part and the second connecting part, and the deformation opening corresponds to the friction protrusion.

[0016] Further, the idle vibration damping system comprises a pre-damping assembly and a main damping assembly.

[0017] The main damping assembly comprises a plurality of main damping spring groups arranged uniformly in the circumferential direction on the hub disc, a front damping disc and a rear damping disc arranged on both sides of the disc sleeve, and the front damping disc is arranged close to the pressure disc.

[0018] The pre-damping assembly comprises a pre-damping spring seat arranged on the front damping disc and a pre-damping spring arranged on the pre-damping spring seat, the pre-damping spring seat is sleeved on the outside of the disc core, the pre-damping spring seat is provided with a pre-damping damping piece, and the pre-damping damping piece is sleeved on the outside of the disc core.

[0019] Further, six pre-damping springs are uniformly and spacedly arranged on the pre-damping spring seat.

[0020] Further, the pre-damping assembly further comprises a pre-damping disc spring arranged between the front damping disc and the hub disc, and the pre-damping spring seat is provided with a pre-damping spring cover covering the pre-damping spring.

[0021] Further, a plurality of mounting holes are uniformly formed in the circumferential direction on the hub disc, the main damping spring groups are arranged in the mounting holes one by one, and the front damping disc and the rear damping disc are provided with a position-avoiding protective cover corresponding to the main damping spring groups.

[0022] Further, the main damping spring group comprises an outer spring and an inner spring arranged in the inner part of the outer spring.

[0023] Further, a plurality of disc sleeve teeth are uniformly formed in the circumferential direction on the outside of the disc core, the inner hole side wall of the disc sleeve is formed with a limiting groove corresponding to the disc sleeve teeth, and the circular arc included angle of the limiting groove is greater than the circular arc included angle of the disc sleeve teeth. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 A three-dimensional structure schematic diagram of a natural gas heavy truck clutch is provided for the embodiment of the utility model;

[0025] Figure 2 A three-dimensional structure schematic diagram of a pressure disc assembly is provided for the embodiment of the utility model;

[0026] Figure 3 A plane structure schematic diagram of a pressure disc assembly is provided for the embodiment of the utility model;

[0027] Figure 4 A sectional structure schematic diagram is provided for Figure 3 ;

[0028] Figure 5 A connection structure schematic diagram of a pressure disc and a transmission piece group is provided for the embodiment of the utility model;

[0029] Figure 6It is a three-dimensional structure schematic view of the driven disc assembly in the embodiment of the utility model;

[0030] Figure 7 It is a plane structure schematic view of the driven disc assembly in the embodiment of the utility model;

[0031] Figure 8 It is Figure 7 The sectional structure schematic view of the utility model;

[0032] Figure 9 It is Figure 8 The local amplification schematic view of C area in the utility model;

[0033] Figure 10 It is the disc sleeve tooth limiting schematic view in the embodiment of the utility model;

[0034] Figure 11 It is the connection schematic view of the wave plate in the embodiment of the utility model. DETAILED DESCRIPTION

[0035] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the accompanying drawings. The embodiments of the present application are shown in the drawings. However, the present application can be implemented in many different forms, and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0037] It can be understood that spatial relationship terms, such as "below", "under", "lower", "underneath", "on", "upper", and the like, can be used herein for describing the relationship of one element or feature to another element or feature as shown in the drawings. It will be understood that the spatial relationship terms are also intended to include different orientations of the device in use and / or operation in addition to the orientation depicted in the drawings. For example, if the device in the drawings is turned over, an element described as "below" or "under" another element or feature would then be oriented "above" the other element or feature. Thus, the exemplary term "below" can encompass both an orientation of above and below. Moreover, the device can be otherwise oriented (for example, rotated 90° or at other orientations) and the spatial description language herein be applied accordingly.

[0038] It should be noted that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or connected through an intermediate element. "Connected" in the following embodiments should be understood as "electrically connected", "communicatively connected" and the like if the circuits, modules, units and the like connected to each other have transmission of electrical signals or data.

[0039] As used herein, the singular forms "a", "an" and "the" include plural referents unless the context clearly dictates otherwise. It should also be understood that the term "including" or "containing", or "having", etc., specifies the presence of stated features, integers, steps, operations, components, parts, or combinations thereof, but does not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof.

[0040] As shown in Figure 1 The embodiment provides a natural gas heavy clutch, which comprises a pressure plate assembly 100 and a driven plate assembly 200.

[0041] As shown in Figures 2-5 The pressure plate assembly 100 comprises a pressure plate 11, a gland 12, a bearing plate 13 and a diaphragm spring 14. The gland 12 is arranged on the pressure plate 11, and the two have a heightening space of about 9mm relative to the standard heavy clutch design.

[0042] The heightening space not only allows the pressure plate 11 to increase in thickness to improve structural strength, but also provides a heat dissipation channel for air circulation.

[0043] The bearing plate 13 is arranged at the middle of the pressure plate 11, the inner end of the diaphragm spring 14 is connected to the bearing plate 13 through rivets, and the outer end is clamped between the edges of the pressure plate 11 and the gland 12. Preferably, the outer end of the diaphragm spring 14 is provided with a support ring 15, and the lower end of the pressure plate 11 is pressed against the outer end of the diaphragm spring 14 by pressing the support ring 15.

[0044] The outer diameter of the diaphragm spring 14 in the application is increased by 10-15mm, for example, 12mm, compared with the diaphragm spring of the standard heavy clutch, so as to provide higher uniformity of pressing force under the same stroke. According to test, the diaphragm spring 14 can provide greater pressing force under the condition that the internal stress is reduced by about 20% when working and the maximum separation force remains unchanged, and the fatigue life of the product is improved due to the reduction of the internal stress of the diaphragm spring 14.

[0045] The side of the pressure plate 11 close to the gland 12 is circumferentially provided with 24 inclined rotary ventilation grooves 16, the groove depth is 2mm, and the width is 5mm. During work, the ventilation grooves 16 form centrifugal air flow with the rotation of the pressure plate, accelerating the dissipation of friction heat. The outer edges of the pressure plate 11 and the gland 12 are connected through four groups of transmission sheet groups 17, ensuring the stability of torque transmission.

[0046] The design of the above structure effectively improves the heat capacity of the product, can overcome the problem of high temperature caused by the low torque at low speed, the high starting slip friction work and the like of the natural gas heavy truck, and effectively absorbs and dissipates the slip friction heat

[0047] As shown in the combination Figures 6~9 The driven disc assembly 200 includes a disc core 21, a disc sleeve 22, a disc hub disc 23, a driven disc 24, a friction plate assembly 25 and an idle vibration damping system 300.

[0048] The disc core 21, the disc sleeve 22 and the disc hub disc 23 are coaxially sleeved in sequence.

[0049] The driven disc 24 is connected with the disc hub disc 23 through a rivet, the friction plate assembly 25 is riveted on both sides of the driven disc 24, and the friction plate assembly 25 is arranged in correspondence with the pressure plate 11; the idle vibration damping system 300 is built-in in the inner side of the driven disc 24.

[0050] The friction plate assembly 25 includes two friction plates 2511 and nine wave-shaped plates 25b clamped therebetween, and the wave-shaped plates 25 are located on the side of the driven disc 24 away from the pressure plate 11.

[0051] In a more preferred embodiment, the combination Figure 11 As shown in the combination, the nine wave-shaped plates 25b are uniformly connected on the driven disc 24 in the circumferential direction, the friction plate 251 is formed with 18 friction protrusions 25c uniformly and spaced in the circumferential direction, each wave-shaped plate 25b includes a first connecting part b1 and a second connecting part b2 matched with deformation, a deformation opening b3 is formed between the first connecting part b1 and the second connecting part b2, and the deformation opening b3 is arranged in correspondence with the friction protrusion 25c; the opening position is opposite to the friction protrusion 25c, and when the clutch is engaged, the wave-shaped plate absorbs the local stress by deformation, and the gap formed by the deformation opening b3 promotes the cooling of the friction surface by airflow.

[0052] When the clutch is engaged, the wave-shaped plate 25b acts as a buffer part to uniformly press the friction plate 251 by the pressure plate 11, so as to realize the engagement comfort; when the clutch is separated, the wave-shaped plate can push away the flywheel to quickly separate the clutch, so as to realize the quick gear shifting; under the above connection structure, when the wave-shaped plate 25b is riveted on the flywheel side clutch to transmit the torque, the riveting position of the wave-shaped plate 25b and the wave height surface are in tensile stress transmission, so as to reduce the warping deformation of the wave-shaped plate caused by stress.

[0053] In the preferred embodiment of the present application, the friction plate adopts a completely new design concept. In actual use, the shape, area, weight, etc. of the friction plate are all subjected to detailed stress checking and test verification. The riveting position of the friction plate is designed innovatively, and a fiber resin-based friction plate material with high temperature resistance and low wear rate is adopted, so that the stress distribution of the riveting point is uniform when the natural gas heavy truck is under heavy load and when it is under reverse drive, and the problems of rapid wear and tear and ablation of the friction plate are overcome.

[0054] In the preferred embodiment of the present application, the idle vibration damping system 300 is composed of a pre-damping assembly 31 and a main damping assembly 32.

[0055] The main damping assembly 32 includes a main damping spring group 321, a front damping disc 322 and a rear damping disc 323.

[0056] The main damping spring group 321 is composed of 6 groups of outer springs 321a (wire diameter 4 mm) and inner springs 321b (wire diameter 2.5 mm) coaxially nested, and the outer springs 321a have higher stiffness to cope with high load impact, and the inner springs 321b provide flexible buffering at low torque.

[0057] The front damping disc 322 and the rear damping disc 323 are covered on both sides of the disc hub disc 23, and the front damping disc 322 is provided with a position avoidance protective cover 324 to prevent the spring group from being invaded by foreign matter.

[0058] Specifically, six mounting holes are uniformly formed on the disc hub disc 23 in the circumferential direction, and the main damping spring group 321 is correspondingly arranged in the mounting hole, and the front damping disc and the rear damping disc form a position avoidance protective cover corresponding to the main damping spring group.

[0059] The pre-damping assembly 31 includes a pre-damping spring seat 311 fixed on the front damping disc 322 by a rivet, and six pre-damping springs 312 are uniformly distributed on the pre-damping spring seat 311 in the circumferential direction. The inner end of the pre-damping spring seat 311 is connected with a pre-damping damping sheet 313 sleeved on the outer side of the disc core 11, and a pre-damping spring cover 314 is additionally installed on the outer side to isolate foreign matter and protect the pre-damping spring 312.

[0060] A pre-damping disc spring 315 is additionally arranged between the front damping disc 322 and the disc hub disc 23 to offset the low-frequency micro-vibration under the idle speed working condition through pre-pressing force.

[0061] As Figure 10As shown, eight disc sleeve teeth 22a are arranged on the outer side of the disc sleeve 22 in the circumferential direction, and a limiting groove 23a is arranged on the inner hole side wall of the disc sleeve 23, the circular arc included angle of the limiting groove 23a is 7.5°, and the circular arc included angle of the disc sleeve tooth 22a is 7°, when the disc sleeve 22 works under the action of the disc core 21, the disc sleeve 22 rotates 7° to contact the disc hub disc 23, the disc hub disc 23 is limited in advance, the main damping spring stops working in advance, and the spring can be protected, and the spring is prevented from being broken due to too large torque impact.

[0062] The above design is provided with an idle speed damping system, is compact in structure, and is stable in damping value; the main damping adopts a six-spring uniform distribution design, improves the limit damping torque, has large torsional damping torque, can realize multi-stage stiffness damping, and has disc sleeve tooth limiting protection for the spring design, and reduces the overload of the spring when the heavy truck is subjected to heavy load impact.

[0063] When the clutch is engaged, the diaphragm spring 14 provides uniform compression force through the increased outer diameter, so that the friction plate 2511 and the pressure plate 11 are in close contact to transmit torque. During the sliding process, the airflow generated by the rotating ventilation groove 16 cooperates with the deformation of the wave-shaped plate 25b to quickly guide out the friction heat. When the engine is idling or low torque input, the spring 312 of the pre-damping assembly 31 and the disc spring 315 act first, absorbing low-frequency vibration; under high load impact, the double-spring structure of the main damping spring group 321 is involved in stages, and high-frequency vibration is inhibited from being transmitted to the gearbox. The limiting structure of the disc core 21 and the disc sleeve 22 allows a small angular displacement when the torque suddenly changes, avoiding abnormal noise caused by rigid collision.

[0064] The above embodiments significantly improve the durability and stability of the clutch under the working conditions of high sliding power of natural gas heavy trucks and multi-frequency vibration through structural innovation and parameter optimization, and solve the core problems of short service life and poor heat dissipation of traditional products.

[0065] The above only describes the preferred embodiments of the utility model, and does not limit the utility model, and any modification, equivalent replacement, improvement, etc. within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. A clutch for a natural gas heavy-duty truck, characterized in that, Including the pressure plate assembly and the driven plate assembly; The pressure plate assembly includes a pressure plate, a pressure cover, a support plate, and a diaphragm spring. The pressure cover is disposed on the pressure plate, and a heightening space is provided between the pressure cover and the pressure plate. The support plate is disposed in the middle of the pressure plate. The inner end of the diaphragm spring is connected to the support plate, and the outer end is fixed between the pressure plate and the pressure cover. Multiple rotating ventilation slots are formed on the side of the pressure plate near the pressure cover. A transmission plate group is provided between the outer edges of the pressure plate and the pressure cover. The driven disc assembly includes a disc core, a disc sleeve, a disc hub, a driven disc, a friction plate assembly, and an idle speed damping system. The disc core, the disc sleeve, and the disc hub are coaxially mounted from the inside to the outside. The driven disc is connected to the outside of the disc hub. The friction plate assembly is disposed on the side of the driven disc and is correspondingly disposed to the pressure plate. The idle speed damping system is built into the inside of the driven disc.

2. The natural gas heavy-duty truck clutch according to claim 1, characterized in that, The height of the heightened space is not less than 9mm, and the outer diameter of the diaphragm spring is 1~15mm larger than that of the standard heavy truck diaphragm spring.

3. The natural gas heavy-duty truck clutch according to claim 1, characterized in that, The friction plate assembly includes multiple wave plates and two friction plates. The two friction plates are connected to both sides of the driven disk, and the multiple wave plates are disposed between the two friction plates and located on the side of the driven disk away from the pressure plate.

4. The natural gas heavy-duty truck clutch according to claim 3, characterized in that, The wave plate is uniformly connected to the driven disk in the circumferential direction. A plurality of friction protrusions are formed on the friction plate and are evenly spaced in the circumferential direction. Each wave plate includes a first connecting part and a second connecting part that cooperate to deform. A deformation opening is formed between the first connecting part and the second connecting part, and the deformation opening is arranged corresponding to the friction protrusion.

5. The natural gas heavy-duty truck clutch according to claim 1, characterized in that, The idle vibration damping system includes a pre-damping component and a main damping component; The main vibration damping assembly includes multiple main vibration damping spring groups evenly arranged circumferentially on the disc hub, a front vibration damping disc and a rear vibration damping disc arranged on both sides of the disc sleeve, with the front vibration damping disc arranged close to the pressure plate; The pre-damping assembly includes a pre-damping spring seat disposed on the front damping disc and a pre-damping spring disposed on the pre-damping spring seat. The pre-damping spring seat is fitted onto the outside of the disc core, and a pre-damping damping plate is disposed on the pre-damping spring seat. The pre-damping damping plate is fitted onto the outside of the disc core.

6. The natural gas heavy-duty truck clutch according to claim 5, characterized in that, The pre-damping spring seat has six pre-damping springs evenly spaced on it.

7. The natural gas heavy-duty truck clutch according to claim 5, characterized in that, The pre-damping assembly also includes a pre-damping disc spring disposed between the front damping disc and the disc hub, and a pre-damping spring cover is provided on the pre-damping spring seat to cover the pre-damping spring.

8. The natural gas heavy-duty truck clutch according to claim 6, characterized in that, The disc hub has multiple mounting holes evenly formed along its circumference, and the main damping spring assemblies are correspondingly arranged in the mounting holes. The front damping disc and the rear damping disc have protective covers formed corresponding to the main damping spring assemblies.

9. The natural gas heavy-duty truck clutch according to claim 6, characterized in that, The main damping spring assembly includes an outer spring and an inner spring built inside the outer spring.

10. The natural gas heavy-duty truck clutch according to claim 1, characterized in that, The outer side of the disc sleeve is uniformly formed with multiple disc sleeve teeth along the circumference, and the inner hole sidewall of the disc hub is formed with a limiting groove corresponding to each of the disc sleeve teeth. The arc angle corresponding to the limiting groove is greater than the arc angle of the disc sleeve teeth.

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