Separation structure of hydraulic retarder, hydraulic retarder and vehicle

Abstract

The utility model relates to the technical field of vehicles, and particularly discloses a separation structure of a hydraulic retarder, the hydraulic retarder and a vehicle, a center shaft is provided with a matching groove, the extension direction of the matching groove is parallel to the axial direction of the center shaft, and a rotor assembly is provided with a matching block. The matching block is attached to the groove wall of the matching groove and can slide along the groove wall of the matching groove, and when the center shaft drives the rotor assembly to rotate, the groove wall of the matching groove pushes the matching block to slide in the direction close to the stator assembly. And the matching groove and the matching block are arranged, the extending direction of the matching groove is parallel to the axial direction of the center shaft, the structure is simpler, the requirements for machining equipment and personnel skills are low, and the machining cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to vehicle technical field especially relates to a separation structure of hydraulic retarder, hydraulic retarder and vehicle. BACKGROUND

[0002] When hydraulic retarder is in working state, inside is full of oil, and when rotor rotates, the braking torque of oil to rotor realizes deceleration, thereby reducing the speed of vehicle, and the distance between rotor and stator is closer, and the deceleration effect is more obvious.

[0003] For this, the prior art provides a kind of hydraulic retarder, setting separation spring, and center shaft and rotor are generally provided with helical spline structure to drive, to realize when hydraulic retarder is in working state, rotor can be close to stator, to provide enough braking torque;When hydraulic retarder is in non-working state, rotor can be away from stator, to reduce no-load braking torque, reduce the power loss of vehicle.But the structure of helical spline is more complex, the equipment required in processing process and personnel skill requirement are higher, thereby higher processing cost. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a kind of separation structure of hydraulic retarder, hydraulic retarder and vehicle, reduce the requirement of equipment and personnel skill in processing process, reduce processing cost.

[0005] The utility model provides a kind of separation structure of hydraulic retarder, the hydraulic retarder includes stator assembly, rotor assembly, center shaft and separation spring, the center shaft can drive the rotor assembly rotation, the separation spring is used to make the rotor assembly on the center shaft slide towards the direction away from the stator assembly,

[0006] The center shaft is equipped with cooperation groove, the extension direction of cooperation groove is parallel with the axial direction of center shaft, and the rotor assembly is provided with cooperation block, the cooperation block is attached with the groove wall of cooperation groove and can slide along the groove wall of cooperation groove, when the center shaft drives the rotor assembly rotation, the groove wall of cooperation groove promotes the cooperation block to slide towards the direction close to the stator assembly.

[0007] As the preferred technical scheme of the separation structure of the hydraulic retarder, a plurality of first connecting grooves are further arranged on the central shaft and extend along the axial direction of the central shaft, the plurality of first connecting grooves are arranged at intervals in the circumferential direction of the central shaft, and two adjacent first connecting grooves form a first connecting protrusion.

[0008] As the preferred technical scheme of the separation structure of the hydraulic retarder, a plurality of first connecting grooves are further arranged on the central shaft and extend along the axial direction of the central shaft, the plurality of first connecting grooves are arranged at intervals in the circumferential direction of the central shaft, and two adjacent first connecting grooves form a first connecting protrusion.

[0009] As the preferred technical scheme of the separation structure of the hydraulic retarder, in the direction away from the stator assembly, the width of the matching groove decreases.

[0010] As the preferred technical scheme of the separation structure of the hydraulic retarder, the matching groove is provided with a first wall, the extension direction of the first wall is arranged at an angle with the axial direction of the central shaft, and part of the matching block is in contact with the first wall and can slide along the first wall.

[0011] As the preferred technical scheme of the separation structure of the hydraulic retarder, the wall surface of the first wall is a spiral surface.

[0012] As the preferred technical scheme of the separation structure of the hydraulic retarder, the matching groove is provided with a second wall, the extension direction of the second wall is parallel to the axial direction of the central shaft, and the second wall is arranged at an angle with the first wall.

[0013] As the preferred technical scheme of the separation structure of the hydraulic retarder, the rotor assembly includes a rotor impeller and a rotor shaft sleeve, the rotor impeller is fixedly connected with the rotor shaft sleeve, the rotor shaft sleeve is arranged outside the central shaft, and the matching block is arranged on the inner side of the rotor shaft sleeve.

[0014] The utility model provides a kind of hydraulic retarder, including the separation structure of the hydraulic retarder of any scheme above.

[0015] The utility model provides a kind of vehicle, including the hydraulic retarder of scheme above.

[0016] The utility model has the advantages that:

[0017] The utility model provides a kind of separation structure of hydraulic retarder, by being provided with matching groove and matching block, and the extension direction of matching groove is parallel with the axial direction of central shaft, structure is more simple, the requirement of processing equipment and personnel skill is all lower, and processing cost is reduced.

[0018] The utility model provides a kind of hydraulic retarder, by being provided with the separation structure of hydraulic retarder in the utility model, the requirement of equipment and personnel skill in processing manufacturing process is reduced, to reduce processing cost.

[0019] The utility model provides a kind of vehicle, by being provided with the hydraulic retarder in the utility model, the processing manufacturing cost of vehicle is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is the sectional view of hydraulic retarder in the utility model embodiment;

[0021] Figure 2 It is the structural schematic view of central shaft in the utility model embodiment;

[0022] Figure 3 It is the structural schematic view of rotor shaft sleeve in the first visual angle in the utility model embodiment;

[0023] Figure 4 It is the structural schematic view of rotor shaft sleeve in the second visual angle in the utility model embodiment.

[0024] In the drawing:

[0025] 1, central shaft;11, first shaft section, 12, stop shoulder;13, second shaft section;131, first connecting groove;132, first connecting protrusion;133, matching groove;1331, first wall;1332, first transition surface;1333, second wall;

[0026] 2, rotor shaft sleeve;21, second connecting groove;22, second connecting protrusion;23, matching block;231, third wall;232, second transition surface;233, fourth wall;

[0027] 3, rotor impeller;4, stator impeller;51, first oil seal;52, second oil seal;53, first sealing ring;54, second sealing ring;6, end cover;61, sealing ring;7, separation spring;81, bearing pressing plate;82, adjusting gasket;83, spring stop ring;84, pump shaft;85, first bearing;86, bearing seat;91, helical gear;92, pressure plate;93, locking bolt;94, second bearing. DETAILED DESCRIPTION

[0028] The technical solutions of the present application will be described clearly and completely in connection with the drawings. Obviously, the described embodiments are some of the embodiments of the present application, but not all the embodiments. Based on the embodiments of the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0029] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", are only for the purpose of description, and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions, and moreover, the first feature is "above", "above" and "above" of the second feature, which includes the first feature above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature is "below", "below" and "below" of the second feature, which includes the first feature below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0030] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0031] The embodiments of the present application will be described in detail below, and the examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present application, and cannot be understood as a limitation on the present application.

[0032] As Figures 1-4The utility model provides a kind of separation structure of hydraulic retarder, for hydraulic retarder.The hydraulic retarder includes stator assembly, rotor assembly, central shaft 1 and separation spring 7.The hydraulic retarder is installed in the output end of transmission, and the output shaft of transmission drives the rotation of the central shaft 1 of hydraulic retarder, and the central shaft 1 can drive the rotation of rotor assembly, and separation spring 7 is used to make rotor assembly slide on central shaft 1 towards the direction away from stator assembly.When the hydraulic retarder needs to provide braking deceleration, oil is filled into the hydraulic retarder, and under the action of oil, braking torque opposite to the rotation direction of rotor assembly is generated, and under the action of axial component force, rotor assembly approaches stator assembly to overcome the elastic force of separation spring 7, so as to further increase braking torque, and the vehicle is decelerated.When the hydraulic retarder does not need to provide braking deceleration, oil in the hydraulic retarder is discharged, and rotor assembly rotates in air, and under the action of air, the braking torque generated at rotor assembly is reduced, and the axial component force is reduced, and rotor assembly is away from stator assembly under the elastic force of separation spring 7, so as to further reduce the braking torque of air acting on rotor assembly, i.e., the braking torque of no-load is reduced.The separation structure of hydraulic retarder in the embodiment is used for the sliding of rotor assembly on central shaft 1, specifically, cooperation groove 133 is arranged on the central shaft 1, and the cooperation groove 133 is arranged on the outer periphery of central shaft 1, and the extension direction of cooperation groove 133 is parallel to the axial direction of central shaft 1.Cooperation block 23 is arranged on rotor assembly, and rotor assembly includes rotor impeller 3 and rotor shaft sleeve 2, and rotor impeller 3 is fixedly connected with rotor shaft sleeve 2, and the connection mode can be welding connection, interference fit or integral molding, and in the embodiment, rotor impeller 3 is welded with rotor shaft sleeve 2.Rotor shaft sleeve 2 is arranged outside central shaft 1, and cooperation block 23 is arranged on the inner side of rotor shaft sleeve 2.Cooperation block 23 is in contact with the groove wall of cooperation groove 133 and can slide along the groove wall of cooperation groove 133.When central shaft 1 drives the rotation of rotor assembly, the groove wall of cooperation groove 133 can push cooperation block 23 to slide towards the direction close to stator assembly.When the hydraulic retarder works, the axial component force generated on rotor assembly under the action of oil overcomes the elastic force of separation spring 7, the groove wall of cooperation groove 133 pushes cooperation block 23 to slide towards stator assembly, and rotor assembly approaches stator assembly to provide sufficient braking torque for deceleration.When the hydraulic retarder runs at no load, the axial component force generated on rotor assembly under the action of air is smaller than the elastic force of separation spring 7, separation spring 7 pushes rotor assembly away from stator assembly, the braking torque at no load is reduced, and power loss is reduced.The separation structure of hydraulic retarder in the embodiment sets cooperation groove and cooperation block, and the extension direction of cooperation groove is parallel to the axial direction of central shaft, so the structure is more simple, the requirements for processing equipment and personnel skills are lower, and the processing cost is reduced.For example, milling or CNC machining center can be used for processing, and complex profile features are not involved, so the skill requirement for processing personnel is lower.

[0033] Further, as shown in Figures 2-4 The central shaft 1 is further provided with a plurality of first connecting grooves 131. The first connecting grooves 131 are arranged on the outer periphery of the central shaft 1 and extend along the axial direction of the central shaft 1. The plurality of first connecting grooves 131 are arranged at intervals along the circumferential direction of the central shaft 1. Adjacent two first connecting grooves 131 form a first connecting protrusion 132, that is, a plurality of first connecting grooves 131 and first connecting protrusions 132 are arranged alternately on the outer periphery of the central shaft 1. Correspondingly, the rotor assembly is provided with a plurality of second connecting grooves 21, which correspond one-to-one to the plurality of first connecting protrusions 132. Adjacent two second connecting grooves 21 form a second connecting protrusion 22, and the plurality of second connecting protrusions 22 correspond one-to-one to the plurality of first connecting grooves 131. The first connecting protrusion 132 is in sliding connection with the second connecting groove 21, and the second connecting protrusion 22 is in sliding connection with the first connecting groove 131. This enables the central shaft 1 to drive the rotor assembly to rotate while the rotor assembly can also slide on the central shaft 1.

[0034] Further, the plurality of engaging grooves 133 correspond one-to-one to the plurality of first connecting grooves 131 and are in communication with the first connecting grooves 131. The engaging grooves 133 are in communication with the ends of the first connecting grooves 131 away from the stator assembly. The plurality of engaging blocks 23 are connected one-to-one to the plurality of second connecting protrusions 22. The engaging blocks 23 are located at the ends of the second connecting protrusions 22 away from the stator assembly, so as to enable the second connecting protrusions 22 to slide in the engaging grooves 133.

[0035] Specifically, as shown in Figure 2 and referring to Figure 1, the width of the matching groove 133 decreases in the direction away from the stator assembly, that is, the matching groove 133 as a whole presents a wedge-shaped structure, and the end of the matching groove 133 communicated with the first connecting groove 131 is a large end, and the width of the matching groove 133 decreases uniformly in the direction away from the stator assembly, so that the extension direction of at least one side wall of the matching groove 133 is arranged at an angle with the axis of the center shaft 1, so that the axial component force of the force of the matching block 23 can be directed to the stator assembly when the center shaft 1 rotates, so that the matching block 23 has a tendency to slide towards the stator assembly. In the embodiment, the matching groove 133 is provided with a first wall 1331 and a second wall 1333, the extension direction of the first wall 1331 is arranged at an angle with the axial direction of the center shaft 1, and part of the matching block 23 is in contact with the first wall 1331 and can slide along the first wall 1331. The extension direction of the second wall 1333 is parallel to the axial direction of the center shaft 1, and the second wall 1333 is arranged at an angle with the first wall 1331. The wall surface of the second wall 1333 is flush with the wall surface of the corresponding groove wall of the first connecting groove 131, the maximum width of the matching groove 133 is equal to the width of the first connecting groove 131, so that the matching block 23 can slide smoothly, and the wear caused by jamming or friction is reduced. Correspondingly, the matching block 23 is provided with a third wall 231 and a fourth wall 233, the third wall 231 is used to contact the first wall 1331, and the fourth wall 233 is used to contact the second wall 1333. The wall surface of the first wall 1331 and the wall surface of the third wall 231 are both arranged as helical surfaces, compared with flat surfaces, arranging the helical surfaces can increase the contact area of the first wall 1331 and the second wall 1333, reduce the pressure per unit area, reduce the risk of fatigue, and increase the service life. In other embodiments, the extension directions of the first wall 1331 and the second wall 1333 of the matching groove 133 are both arranged at an angle with the axial direction of the center shaft 1, and the third wall 231 and the fourth wall 233 of the matching block 23 are respectively in contact with the first wall 1331 and the second wall 1333, and the wall surfaces of the first wall 1331 and the third wall 231 can be arranged as helical surfaces according to needs, and / or the wall surfaces of the second wall 1333 and the fourth wall 233 can be arranged as helical surfaces.

[0036] The utility model provides a kind of hydraulic retarder, including the separation structure of hydraulic retarder in the embodiment of the utility model.The sectional view of the hydraulic retarder of the utility model is as Figure 1As shown, the central shaft 1 can be divided into a first shaft section 11 and a second shaft section 13, and a shoulder is arranged between the first shaft section 11 and the second shaft section 13. The first shaft section 11 is used to be connected with the transmission, and the second shaft section 13 is used to be connected with the rotor assembly. A helical gear 91 is connected with the first shaft section 11 through a spline, and the helical gear 91 is used to be engaged with the gear of the transmission output shaft. An end of the first shaft section 11 is connected with a pressure disc 92, and a locking bolt 93 locks the pressure disc 92 at the end of the first shaft section 11 and makes the pressure disc 92 press the helical gear 91. A second bearing 94 is arranged between the helical gear 91 and the shoulder, and the second bearing 94 is an angular contact bearing, one end of which is in contact with the helical gear 91 and the other end of which is in contact with the shoulder. An end of the second shaft section 13 close to the first shaft section 11 is connected with an end cover 6, and a first oil seal 51 and a second oil seal 52 are arranged between the end cover 6 and the second shaft section 13 in the axial direction. An annular groove is further arranged on the second shaft section 13, and a first sealing expander ring 53 is arranged in the annular groove, so as to ensure that the sealing between the end cover 6 and the second shaft section 13 is good. A part of the end cover 6 is matched with the outer ring of the second bearing 94, and the other end of the end cover 6 is fixedly connected with a stator assembly. The stator assembly includes a stator impeller 4, and a sealing ring 61 is arranged between the end cover 6 and the stator impeller 4 for sealing. The rotor assembly includes a rotor impeller 3 and a rotor shaft sleeve 2, and the rotor impeller 3 and the rotor shaft sleeve 2 are connected through welding or are integrally formed. The rotor impeller 3 is arranged inside the end cover 6, and the rotor shaft sleeve 2 is connected on the second shaft section 13 through the separation structure of the hydraulic retarder in the embodiment, that is, the second shaft section 13 can drive the rotor shaft sleeve 2 to rotate, and meanwhile the rotor shaft sleeve 2 can slide in the axial direction. The inside of the stator impeller 4 is sleeved on the rotor shaft sleeve 2, and when the rotor shaft sleeve 2 slides in the axial direction, the outside of the rotor shaft sleeve 2 and the stator impeller 4 slide relatively. Correspondingly, an annular groove is also arranged on the rotor shaft sleeve 2, and a second sealing expander ring 54 is arranged in the annular groove, so as to realize the sealing between the rotor shaft sleeve 2 and the stator impeller 4. A bearing seat 86 is further connected on the stator impeller 4, and the bearing seat 86 is interference-fitted or welded with the stator impeller 4. The bearing seat 86 is used to be matched with the outer ring of a first bearing 85, and the first bearing 85 is an angular contact bearing. The inner ring of the first bearing 85 is sleeved on a bearing pressing plate 81, and the bearing pressing plate 81 is matched with the second shaft section 13. The second shaft section 13 is provided with an internal thread hole, a pump shaft 84 passes through the bearing pressing plate 81, is fixedly connected with the second shaft section 13 through the internal thread hole, and presses the bearing pressing plate 81 at the end of the second shaft section 13. A limiting protrusion is arranged at the end of the bearing pressing plate 81, and is used to limit one end of the first bearing 85. The other end of the first bearing 85 is limited by a spring retainer 83. The spring retainer 83 is sleeved on the bearing pressing plate 81, and a separation spring 7 is arranged between the spring retainer 83 and the rotor shaft sleeve 2, and the separation spring 7 is always in a compressed state.The adjusting gasket 82 is arranged between the bearing pressing plate 81 and the second shaft segment 13, the relative position of the bearing pressing plate 81 and the second shaft segment 13 is changed by changing the thickness of the adjusting gasket 82, and thus the play of the first bearing 85 is adjusted.

[0037] The utility model provides a kind of vehicle, including the hydraulic retarder in the embodiment of the present application. By setting the hydraulic retarder in the embodiment of the present application, the processing manufacturing cost of vehicle is reduced.

[0038] Obviously, the above embodiments of the utility model are only for clear illustration of the utility model, and not the limitation of the implementation mode of the utility model. For ordinary skilled person in the art, other different forms of changes or variations can be made on the basis of the above description. Here, all the implementation modes are not exhausted. Any modification, equivalent replacement and improvement, etc. within the spirit and principle of the utility model should be included in the protection scope of the utility model claims.

Claims

1. A separation structure of a hydraulic retarder, the hydraulic retarder comprising a stator assembly, a rotor assembly, a central shaft (1) capable of driving the rotor assembly to rotate, and a separation spring (7) for sliding the rotor assembly on the central shaft (1) in a direction away from the stator assembly, characterized in that: the central shaft (1) is provided with a matching groove (133), the extension direction of the matching groove (133) is parallel to the axial direction of the central shaft (1), the rotor assembly is provided with a matching block (23), the matching block (23) is attached to the groove wall of the matching groove (133) and can slide along the groove wall of the matching groove (133), and when the central shaft (1) drives the rotor assembly to rotate, the groove wall of the matching groove (133) can push the matching block (23) to slide in a direction close to the stator assembly. The central shaft (1) is further provided with a plurality of first connecting grooves (131), the first connecting grooves (131) extend along the axial direction of the central shaft (1), a plurality of the first connecting grooves (131) are arranged in a circumferential direction of the central shaft (1), and adjacent two first connecting grooves (131) form a first connecting protrusion (132); the rotor assembly is provided with a plurality of second connecting grooves (21), a plurality of the second connecting grooves (21) correspond to a plurality of the first connecting protrusions (132) one by one, and adjacent two second connecting grooves (21) form a second connecting protrusion (22), a plurality of the second connecting protrusions (22) correspond to a plurality of the first connecting grooves (131) one by one.

2. The separation structure of a hydraulic retarder according to claim 1, characterized in that, The matching groove (133) is provided in a plurality, a plurality of the matching grooves (133) correspond to and communicate with a plurality of the first connecting grooves (131) one by one, and the matching block (23) is provided in a plurality, a plurality of the matching blocks (23) are connected to a plurality of the second connecting protrusions (22) one by one.

3. The separation structure of a hydraulic retarder according to claim 2, characterized in that, In a direction away from the stator assembly, the width of the matching groove (133) decreases.

4. The separation structure of a hydraulic retarder according to claim 1, wherein The matching groove (133) is provided with a first wall (1331), the extension direction of the first wall (1331) is arranged at an angle with the axial direction of the central shaft (1), and part of the matching block (23) is attached to the first wall (1331) and can slide along the first wall (1331).

5. The separation structure of a hydraulic retarder according to claim 4, characterized in that, The wall surface of the first wall (1331) is a spiral surface.

6. The separation structure of a hydraulic retarder according to claim 5, wherein The matching groove (133) is provided with a second wall (1333), the extension direction of the second wall (1333) is parallel to the axial direction of the central shaft (1), and the second wall (1333) is arranged at an angle with the first wall (1331).

7. The separation structure of a hydraulic retarder according to claim 5, wherein The rotor assembly comprises a rotor impeller (3) and a rotor shaft sleeve (2), the rotor impeller (3) is fixedly connected with the rotor shaft sleeve (2), the rotor shaft sleeve (2) is sleeved outside the central shaft (1), and the matching block (23) is arranged on the inner side of the rotor shaft sleeve (2).

8. A separation structure of a hydraulic retarder according to any one of claims 1 to 7, characterized in that, A separation structure of a hydraulic retarder according to any one of claims 1-8.

9. Hydraulic retarder, characterized in that The hydraulic retarder according to claim 9.

10. Vehicle, characterized in that ​

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