Hydraulic retarder shafting structure

Abstract

The utility model discloses a kind of hydraulic retarder shafting structures, including a pair of outer spline hollow flange plate, retarder spline shaft, a pair of tapered roller bearings, a pair of shaft sleeve, stator, rotor, retarder shell, tension bolt, flange nut, multiple oil seals, O-ring and a pair of gland cap.The utility model retarder shafting structure makes retarder can be assembled as independent individual on whole vehicle drive train, improves selection flexibility, reduces matching application cost;Realize that retarder is matched as a separate whole, does not need to be integrated on gearbox, reduces concurrent fault brought by combination assembly with gearbox.

Description

Technical Field

[0001] This utility model belongs to the technical field of hydraulic retarder structure, and relates to a hydraulic retarder shaft system structure. Background Technology

[0002] Existing hydraulic retarders are categorized into series and parallel types based on their installation method. Both require mounting on the transmission and must be integrated with the transmission before they can be used. In a series retarder, the transmission's output shaft passes through the center of the retarder and is connected via a tightened output flange. This requires an additional rear auxiliary housing connecting bracket and an extended output shaft in the transmission. In a parallel retarder, the transmission adds a gear that meshes with the retarder gear. This requires an additional rear auxiliary housing structure, which needs an additional set of gears for meshing with the retarder gear, an extended output shaft, and a retarder mounting port on the rear cover.

[0003] Whether it is a series retarder or a parallel retarder, it needs to be integrated with the transmission for bundled matching and application. This will bring about some fault problems in the assembly of the two parts and related components and their cooperation, increasing matching costs and difficulties, and reducing the user's choice flexibility. Utility Model Content

[0004] To address the shortcomings of existing technologies, the purpose of this utility model is to provide a hydraulic retarder shaft system structure that allows the hydraulic retarder to be directly connected to the vehicle's drive shaft. This enables the retarder to be used as a separate unit without being integrated into the transmission, solving the problem of bundling the retarder with the transmission, improving user flexibility, reducing matching difficulty and cost, and minimizing concurrent failures caused by assembly with the transmission.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A hydraulic retarder shaft system structure includes a pair of outer splined hollow flanges, a retarder splined shaft, a pair of tapered roller bearings, a pair of bushings, a stator, a rotor, a retarder housing, tension bolts, flange nuts, multiple oil seals, O-rings, and a pair of glands; The external spline hollow flange includes a flange end and a shaft end at one end, with an integral central through hole; the shaft ends of the two external spline hollow flanges are coaxial and opposite each other, and are tightened and connected by a tension bolt passing through their central through hole and a flange nut at the end. The retarder spline shaft sleeve is located outside the shaft ends of the two external spline hollow flanges. The external splines at the shaft ends cooperate with the internal splines of the retarder spline shaft to transmit power. The retarder splined shaft passes through the center hole of the stator, and the stator is fixedly installed on the retarder housing and remains stationary. The rotor is assembled with the external spline of the retarder splined shaft to form a whole, and the rotation of the retarder splined shaft drives the rotor to rotate. Shoulders are provided on the outer walls of the rotor side and stator side of the retarder spline shaft, and bushings are fitted at both ends of the retarder spline shaft; a pair of tapered roller bearings are assembled on the retarder spline shaft and are located between the shoulder and bushing respectively.

[0006] This utility model also includes the following technical features: Specifically, the inner ring of the tapered roller bearing is interference-fitted with the outer ring of the retarder spline shaft; one end face of the inner ring of the tapered roller bearing fits with the shoulder end face of the retarder spline shaft, and the other end face of the inner ring of the tapered roller bearing fits with the end face of the bushing, with the inner ring of the tapered roller bearing being limited by the bushing.

[0007] Specifically, the outer ring of the tapered roller bearing on the rotor side is interference-fitted with the corresponding hole in the retarder housing, and the inner end face of the outer ring of the tapered roller bearing is fixedly limited on one end face of the retarder housing; the outer ring of the tapered roller bearing on the stator side is interference-fitted with the corresponding hole in the stator, and the inner end face of the outer ring is fitted with one end face of the stator, thus fixing and limiting the outer ring of the tapered roller bearing.

[0008] Specifically, the bushing and the retarder spline shaft are interference-fitted, and O-rings are provided between the bushing and the retarder spline shaft for sealing; high-pressure oil seals are installed on the outer sides of both bushings for sealing; one end face of the two bushings mates with the outer end face of the inner ring of the tapered roller bearing, and the other end face mates with the inner end face of the outer spline hollow flange.

[0009] Specifically, the oil seal is installed inside the pressure cover, with the outer ring of the oil seal and the inner ring of the pressure cover having an interference fit. The back of the oil seal is pressed against the inner end face of the pressure cover to axially limit the oil seal. One pressure cover is fixedly installed on the back of the stator, and the other pressure cover is fixedly installed on the rotor-side retarder housing. Both pressure covers are sealed with O-rings between themselves and the retarder housing.

[0010] Specifically, the external spline hollow flange can be connected and installed with the front and rear transmission shafts of the vehicle to complete the assembly of the retarder for individual matching application on the vehicle.

[0011] Compared with the prior art, this utility model has the following technical effects: This utility model's retarder shaft system structure allows the retarder to be assembled as an independent unit on the vehicle's drivetrain, improving customer flexibility and reducing matching application costs. The double tapered roller bearing structure can withstand axial and radial forces, resulting in higher reliability. Two flanges are distributed on both sides, with an external spline design replacing the drive shaft and directly engaging with the internal spline of the retarder's spline shaft to jointly support the retarder's spline shaft and transmit power. The hollow flange structure design allows for tightening of the two flanges by passing large bolts through the center holes of the two flanges and securing them with nuts, resulting in a simple and reliable structure. The input and output flanges have identical structures, resulting in a simple design and lower cost. The input and output flange structures simplify the installation, maintenance, and disassembly of the retarder. The flange end face structure can be diversified to meet the assembly requirements of different vehicle drive shafts. The bearings on both sides of the retarder spline shaft have the same outer diameter, as do the bushings on both sides, ensuring a symmetrical structure, reducing off-center loading, and improving reliability. The bushings on both sides are identical, and the oil seals have the same outer diameter, all on the same axis, resulting in minimal axial runout and high sealing reliability. The identical design of components on both sides reduces the variety of parts, lowering production difficulty and costs. Attached Figure Description

[0012] Figure 1 This is a cross-sectional view of the shaft system structure of the hydraulic retarder of this utility model.

[0013] The meanings of the labels in the diagram are as follows: 1. External spline hollow flange, 2. Retarder spline shaft, 3. Tapered roller bearing, 4. Bushing, 5. Stator, 6. Rotor, 7. Retarder housing, 8. Tensioning bolt, 9. Flange nut, 10. Oil seal, 11. O-ring, 12. Gland. Detailed Implementation

[0014] The following are specific embodiments of the present invention. It should be noted that the present invention is not limited to the following specific embodiments. All equivalent modifications made based on the technical solutions of this application fall within the protection scope of the present invention.

[0015] Example: This embodiment provides a hydraulic retarder shaft system structure, such as Figure 1 As shown, the system includes a pair of outer splined hollow flanges 1, a retarder splined shaft 2, a pair of tapered roller bearings 3, a pair of bushings 4, a stator 5, a rotor 6, a retarder housing 7, tension bolts 8, flange nuts 9, multiple oil seals 10, O-rings 11, and a pair of glands 12. These components are assembled together to form the hydraulic retarder shaft system, achieving shaft tensioning, shaft stress distribution, and power transmission. This allows the retarder to be individually mounted on the vehicle's drivetrain.

[0016] The external spline hollow flange 1 includes a flange end and a shaft end at one end, with an integral central through hole; the shaft ends of the two external spline hollow flanges 1 are coaxial and opposite each other, and are tightened and connected by a tension bolt 8 passing through their central through hole and a flange nut 9 at the end; the two flanges are completely identical, with the flanges symmetrically distributed on both sides, and the flanges are splined with the retarder spline shaft 2 for power transmission. One inner end face is pressed against the bushing 4, and the bushing 4 and the shoulder of the retarder spline shaft 2 press the bearing 3. Then, the tension bolt 8 is passed through the central hole of the two flanges and tightened by the flange nut 9, thereby realizing the assembly and tightening of the entire shaft system, so that the retarder can be installed on the vehicle's transmission system for power transmission and deceleration.

[0017] The retarder splined shaft 2 is sleeved on the shaft ends of two external splined hollow flanges 1. The external splines on the shaft ends mate with the internal splines of the retarder splined shaft 2 for power transmission. The retarder splined shaft 2 passes through the center hole of the stator 5, and the stator 5 is fixedly installed on the retarder housing 7 and remains stationary. The rotor 6 is assembled with the external spline of the retarder splined shaft 2 to form a whole. The rotation of the retarder splined shaft 2 drives the rotor 6 to rotate. Shoulders are provided on the outer walls of the rotor 6 side and the stator 5 side of the retarder splined shaft 2. Bushings 4 are sleeved at both ends of the retarder splined shaft 2. A pair of tapered roller bearings 3 are assembled on the retarder splined shaft 2 and are located between the shoulders and bushings 4, respectively.

[0018] The inner ring of the tapered roller bearing 3 is fitted onto the splined shaft 2 of the retarder; the inner ring of the tapered roller bearing 3 is interference-fitted with the outer ring of the splined shaft 2 of the retarder; one end face of the inner ring of the tapered roller bearing 3 is fitted with the shoulder end face of the splined shaft 2 of the retarder, and the other end face of the inner ring of the tapered roller bearing 3 is fitted with the end face of the bushing 4, and the inner ring of the tapered roller bearing 3 is limited by the bushing 4.

[0019] The outer ring of the tapered roller bearing 3 located on the rotor 6 side is interference-fitted with the corresponding hole of the retarder housing 7, and the inner end face of the outer ring of the tapered roller bearing 3 is fixed and limited on one end face of the retarder housing 7; the outer ring of the tapered roller bearing 3 located on the stator 5 side is interference-fitted with the corresponding hole of the stator 5, and the inner end face of the outer ring is fitted with one end face of the stator 5, thus fixing and limiting the outer ring of the tapered roller bearing 3.

[0020] The bushing 4 and the retarder spline shaft 2 are interference fit, and O-rings 11 are provided between the bushing 4 and the retarder spline shaft 2 for sealing; high-pressure oil seals 10 are installed on the outer sides of the bushings 4 on both sides for sealing; one end face of the two bushings 4 is fitted with the outer end face of the inner ring of the tapered roller bearing 3, and the other end face is fitted with the inner end face of the outer spline hollow flange 1.

[0021] Oil seal 10 is installed inside pressure cover 12. The outer ring of oil seal 10 is interference-fitted with the inner ring of pressure cover 12. The back of oil seal 10 is pressed against the inner end face of pressure cover 12 to axially limit oil seal 10. One pressure cover 12 is fixedly installed on the back of stator 5, and the other pressure cover 12 is fixedly installed on the retarder housing 7 on the rotor 6 side. Both are sealed with O-rings 11 between them and the retarder housing 7.

[0022] The external spline hollow flange 1 can be connected and installed with the front and rear drive shafts of the vehicle to complete the assembly of the retarder for individual matching application on the vehicle.

[0023] The specific assembly process of this utility model is as follows: (1) Assemble the tapered roller bearing on the inner ring of the back of the retarder stator, and then fix the stator on the retarder housing; (2) Assemble the retarder rotor onto the retarder splined shaft; (3) After completing steps 1 and 2, pass the stator end of the retarder spline shaft through the center of the stator and the center of the bearing; (4) The bearing is installed on the inner ring of the back of the housing, and then the two housings are fixed together; (5) Fit the O-ring into the corresponding groove of the retarder spline shaft; (6) Mount the shaft on both sides of the splined shaft, with one end face pressing against the outer end face of the inner ring of the bearing; (7) Place one side of the oil seal on the inner ring of the cap and then assemble the cap onto the housing; place the other side of the oil seal on the inner ring of the cap and then assemble the cap onto the housing. (8) Assemble flanges on both sides, pass the tension bolts through the center holes of the two flanges, and then tighten them with nuts to complete the assembly of the entire shaft system of the retarder.

[0024] (9) Connect and install the two flanges to the front and rear drive shafts of the vehicle respectively, thus completing the assembly of the retarder for individual matching and application on the vehicle.

[0025] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the protection scope of the present invention.

[0026] It should also be noted that the various specific technical features described in the above embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, this utility model will not describe the various possible combinations separately.

[0027] Furthermore, various different embodiments of this utility model can be combined in any way, as long as they do not violate the spirit of this utility model, they should also be regarded as the content disclosed by this utility model.

Claims

1. A hydraulic retarder shafting arrangement, characterized by, Includes a pair of outer spline hollow flanges (1), a retarder spline shaft (2), a pair of tapered roller bearings (3), a pair of bushings (4), a stator (5), a rotor (6), a retarder housing (7), tension bolts (8), flange nuts (9), multiple oil seals (10), O-rings (11), and a pair of glands (12). The external spline hollow flange (1) includes a flange end and a shaft end at one end, and an integral central through hole; the shaft ends of the two external spline hollow flanges (1) are coaxial and opposite to each other, and are tightened and connected by a tension bolt (8) passing through their central through hole and a flange nut (9) at the end. The retarder spline shaft (2) is sleeved on the shaft ends of two external spline hollow flanges (1), and the external spline at the shaft end cooperates with the internal spline of the retarder spline shaft (2) to transmit power. The retarder spline shaft (2) passes through the center hole of the stator (5), and the stator (5) is fixedly installed on the retarder housing (7) and remains stationary; the rotor (6) is assembled with the external spline of the retarder spline shaft (2) to form a whole, and the rotation of the retarder spline shaft (2) drives the rotor (6) to rotate. Shoulders are provided on the outer walls of the rotor (6) side and stator (5) side of the retarder spline shaft (2), and bushings (4) are fitted at both ends of the retarder spline shaft (2); a pair of tapered roller bearings (3) are mounted on the retarder spline shaft (2) and are located between the shoulder and bushing (4) respectively.

2. The hydraulic retarder shafting arrangement of claim 1, wherein, The inner ring of the tapered roller bearing (3) is interference-fitted with the outer ring of the retarder spline shaft (2); one end face of the inner ring of the tapered roller bearing (3) is fitted with the shoulder end face of the retarder spline shaft (2), and the other end face of the inner ring of the tapered roller bearing (3) is fitted with the end face of the bushing (4), and the inner ring of the tapered roller bearing (3) is limited by the bushing (4).

3. The hydraulic retarder shaft system structure as described in claim 2, characterized in that, The outer ring of the tapered roller bearing (3) located on the rotor (6) side is interference-fitted with the corresponding hole of the retarder housing (7), and the inner end face of the outer ring of the tapered roller bearing (3) is fixed and limited on one end face of the retarder housing (7); the outer ring of the tapered roller bearing (3) located on the stator (5) side is interference-fitted with the corresponding hole of the stator (5), and the inner end face of the outer ring is fitted with one end face of the stator (5), thus fixing and limiting the outer ring of the tapered roller bearing (3).

4. The hydraulic retarder shaft system structure as described in claim 1, characterized in that, The bushing (4) and the retarder spline shaft (2) are interference fit, and O-rings (11) are provided between the bushing (4) and the retarder spline shaft (2) for sealing; high-pressure oil seals (10) are installed on the outer sides of the bushings (4) on both sides for sealing; one end face of the two bushings (4) is fitted with the outer end face of the inner ring of the tapered roller bearing (3), and the other end face is fitted with the inner end face of the outer spline hollow flange (1).

5. The hydraulic retarder shafting structure of claim 1, wherein, The oil seal (10) is installed inside the pressure cap (12). The outer ring of the oil seal (10) is press-fitted with the inner ring of the pressure cap (12). The back of the oil seal (10) is pressed against the inner end face of the pressure cap (12) to axially limit the oil seal (10). One pressure cap (12) is fixedly installed on the back of the stator (5), and the other pressure cap (12) is fixedly installed on the retarder housing (7) on the rotor (6) side. Both are sealed with O-rings (11) between them and the retarder housing (7).

6. The hydraulic retarder shaft system structure as described in claim 1, characterized in that, The external spline hollow flange (1) can be connected and installed with the front and rear transmission shafts of the vehicle to complete the assembly of the retarder for individual matching application on the vehicle.

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