Engineering machinery hydraulic transfer case with parking braking function
By installing a parking brake outside the hydraulic transfer case of the construction machinery, which consists of friction pads, a disc spring, a cover plate, a piston, and a cylinder, the problem of easy damage to the brake assembly is solved, and the effect of being far from the ground and structurally stable is achieved.
Patent Information
- Application Number
- CN202520655873.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-09
- Publication Date
- 2026-01-09
- Estimated Expiration
- 2035-04-09
AI Technical Summary
The brake assembly of the hydraulic transfer case in existing construction machinery is prone to damage and is close to the ground, resulting in structural instability.
A parking brake is installed outside the housing, consisting of friction pads, a disc spring, a cover plate, a piston, and a cylinder. The piston is fitted inside the cylinder. The cover plate is connected to the housing via a steel sleeve. Steel plate I is installed inside the steel sleeve and is fixed to the four axles. Steel plate II is fixed at the bottom. There is a wave spring between steel plate I and steel plate II. There is a pressure plate at the lower end of the piston. There is a disc spring between the cover plate and the piston. The brake release bolt is connected to the piston.
The increased height of the hydraulic transfer case of the engineering machinery from the ground reduces the risk of damage to the brake assembly and enhances the stability of the structure.
Smart Images
Figure CN223781937U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a transfer case, and more particularly to a hydraulic transfer case for engineering machinery with a parking device, which consists of a housing, a four-axis, a three-axis, a two-axis, a one-axis, a four-axis large gear, a four-axis small gear, a three-axis large gear, a three-axis small gear, a two-axis large gear, a two-axis small gear, and a one-axis gear. Background Technology
[0002] Currently, a hydraulic transfer case for engineering machinery has been publicly disclosed. Its structural features include: a housing containing a transmission assembly, which comprises a four-axis shaft, a third-axis shaft, a second-axis shaft, and a first-axis shaft arranged parallel to the four-axis shaft; a large gear and a small gear on the fourth-axis shaft; a large gear and a small gear on the third-axis shaft; a large gear and a small gear on the second-axis shaft; and a gear on the first-axis shaft. Both ends of the first-axis shaft extend out of the housing and connect to output flanges. The large gear on the second-axis shaft is connected to a clutch connecting plate via a clutch transition sleeve. The clutch connecting plate is connected to an inner spline sleeve. The inner spline sleeve is connected to an outer spline sleeve already mounted on the second-axis shaft via static and dynamic friction plates. The end faces of the static or dynamic friction plates contact the end face of the first-gear piston mounted in the first-gear cylinder. The large gear on the fourth-axis shaft is also connected to a clutch connecting plate via a clutch transition sleeve. The clutch connecting plate is connected to an inner spline sleeve. The inner spline sleeve is connected to the outer spline sleeve already mounted on the fourth-axis shaft via static and dynamic friction plates. The end face of the friction plate or moving friction plate contacts the end face of the second-gear piston fitted in the second-gear cylinder. A second-gear hydraulic clutch, consisting of a clutch connecting plate, inner spline sleeve, outer spline sleeve, second-gear cylinder, second-gear piston, stationary friction plate, and moving friction plate, is installed outside the housing and connected to the four-shaft drive. A first-gear hydraulic clutch, consisting of a clutch connecting plate, inner spline sleeve, outer spline sleeve, first-gear cylinder, first-gear piston, stationary friction plate, and moving friction plate, is also installed outside the housing and connected to the second-gear drive. A brake assembly is installed at one end of the shaft extending out of the housing, connected to the housing via a support seat. The brake assembly consists of a cylinder, support seat, brake disc, inner brake pad, outer brake pad, inner brake plate, and outer brake plate. An outer brake plate is installed on the upper part of the support seat, contacting the outer surface of the brake disc fixed to the shaft via the outer brake pad. The lower end of the outer brake plate is connected to the cylinder, and the cylinder rod passes through the lower end of the outer brake plate and connects to the inner brake plate. The inner brake plate contacts the inner surface of the brake disc via the inner brake pad. Therefore, this structure is close to the ground, which can easily cause damage to the brake assembly. Summary of the Invention
[0003] The purpose of this invention is to provide a hydraulic transfer case for engineering machinery with a parking device that is located far from the ground and is less likely to damage the brake assembly.
[0004] To achieve the above objectives, this utility model provides a hydraulic transfer case for engineering machinery with a parking brake, comprising a housing, a transmission assembly inside the housing, and the transmission assembly including a four-shaft assembly, a third shaft, a second shaft, and a first shaft arranged parallel to the four-shaft assembly, a large gear and a small gear on the fourth shaft, a large gear and a small gear on the third shaft, a large gear and a small gear on the second shaft, a large gear and a small gear on the second shaft, and a gear on the first shaft. Both ends of the first shaft extend out of the housing and are connected to an output flange. The large gear on the second shaft is connected to the clutch via a clutch transition sleeve. The clutch connecting plate is connected to the inner spline sleeve. The inner spline sleeve is connected to the outer spline sleeve already mounted on the second shaft via static and dynamic friction plates. The end faces of the static or dynamic friction plates contact the end face of the first-gear piston mounted in the first-gear cylinder. The large gear of the four shaft is also connected to the clutch connecting plate via a clutch transition sleeve. The clutch connecting plate is connected to the inner spline sleeve. The inner spline sleeve is connected to the outer spline sleeve already mounted on the four shaft via static and dynamic friction plates. The end faces of the static or dynamic friction plates contact the end face of the second-gear piston mounted in the second-gear cylinder. A second-speed hydraulic clutch, consisting of a clutch connecting plate, inner spline sleeve, outer spline sleeve, second-speed cylinder, second-speed piston, static friction plate, and dynamic friction plate, is installed outside the housing and connected to the four-shaft drive. A first-speed hydraulic clutch, also consisting of a clutch connecting plate, inner spline sleeve, outer spline sleeve, first-speed cylinder, first-speed piston, static friction plate, and dynamic friction plate, is also installed outside the housing and connected to the four-shaft drive. A parking brake, consisting of friction plates, disc spring, cover plate, piston, and cylinder, is also installed outside the housing and connected to the four-shaft drive. The piston is fitted onto the cylinder. Inside the cylinder, the cover plate is connected to the housing via the cylinder body and the steel sleeve. Steel plate I is installed inside the steel sleeve and fixed to the four shafts already set inside the housing. Steel plate II is fixed at the bottom inside the steel sleeve. Friction plates that can contact steel plate I are provided on the upper surface of steel plate II. Wave springs are fitted on the four shafts between steel plate I and steel plate II. A pressure plate is installed at the lower end of the piston. Friction plates that can contact steel plate I are provided on the lower surface of the pressure plate. A butterfly spring is provided between the cover plate and the piston. A release bolt that can connect to the upper end of the piston is provided on the cover plate.
[0005] An external spline is provided on the upper part of the four shafts to accommodate steel sheet I, and a groove is provided on the four shafts below the external spline to accommodate a small pressure plate.
[0006] The brake release bolt is designed in a cross shape, with its upper length being shorter than its lower length, so that the lower part of the brake release bolt can be connected to the upper end of the piston.
[0007] With this structure, a parking brake consisting of friction plates, a disc spring, a cover plate, a piston, and a cylinder is installed outside the housing and connected to the four-axis drive. The piston is fitted inside the cylinder, and the cover plate is connected to the housing via the cylinder and a steel sleeve. Steel plate I is installed inside the steel sleeve and fixed to the four-axis already installed inside the housing. Steel plate II is fixed at the bottom inside the steel sleeve, and friction plates that can contact steel plate I are provided on the upper surface of steel plate II. A wave spring is fitted on the four-axis between steel plate I and steel plate II. A pressure plate is installed at the lower end of the piston, and friction plates that can contact steel plate I are provided on the lower surface of the pressure plate. A disc spring is installed between the cover plate and the piston, and a brake release bolt that can connect to the upper end of the piston is provided on the cover plate. This achieves the purpose of being farther from the ground and less likely to cause damage to the brake assembly. Attached Figure Description
[0008] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.
[0009] Appendix Figure 1 This is a schematic sectional view of a hydraulic transfer case for engineering machinery with a parking device according to this utility model.
[0010] In the diagram: 1. Housing 2. Steel Plate II 3. Wave Spring 4. Parking Brake 5. Disc Spring 6. Cover Plate 7. Brake Release Bolt 8. Cylinder 9. Piston 10. Pressure Plate 11. Friction Plate 12. Steel Plate I 13. Steel Sleeve 14. Small Pressure Plate 15. Four Axles Detailed Implementation
[0011] Appendix Figure 1The present invention relates to a hydraulic transfer case for engineering machinery with a parking brake, comprising a housing 1, a transmission assembly inside the housing 1, the transmission assembly including a four-shaft 15, a three-shaft, a two-shaft, and a one-shaft arranged parallel to the four-shaft 15, a large gear and a small gear on the four-shaft 15, a large gear and a small gear on the three-shaft, a large gear and a small gear on the two-shaft, a large gear and a small gear on the two-shaft, and a gear on the one-shaft. Both ends of the one-shaft extend out of the housing 1 and are connected to an output flange. The large gear on the two-shaft is connected to a clutch connecting plate via a clutch transition sleeve. The clutch connecting plate is connected to an inner spline sleeve. The inner spline sleeve is connected to an outer spline sleeve already fitted on the two-shaft via static friction plates and dynamic friction plates. The end faces of the static or dynamic friction plates... The first-gear piston, fitted into the first-gear cylinder, contacts the end face of the first-gear piston. The four-axis large gear is also connected to the clutch connecting plate via a clutch transition sleeve. The clutch connecting plate is connected to the inner spline sleeve, which is connected to the outer spline sleeve already fitted on the four-axis 15 via static and dynamic friction plates. The end faces of the static or dynamic friction plates contact the end face of the second-gear piston fitted into the second-gear cylinder. A second-gear hydraulic clutch, consisting of a clutch connecting plate, inner spline sleeve, outer spline sleeve, second-gear cylinder, second-gear piston, static friction plates, and dynamic friction plates, is provided outside the housing 1 and is connected to the four-axis 15. A first-gear hydraulic clutch, consisting of a clutch connecting plate, inner spline sleeve, outer spline sleeve, first-gear cylinder, first-gear piston, static friction plates, and dynamic friction plates, is also provided outside the housing 1 and is connected to the second-gear cylinder. A parking brake 4, consisting of friction plates 11, a disc spring 5, a cover plate 6, a piston 9, and a cylinder 8, is also installed outside the housing 1 and is connected to the four-shaft 15 via a transmission connection. The piston 9 is fitted inside the cylinder 8, and the cover plate 6 is connected to the housing 1 via the cylinder 8 and a steel sleeve 13. A steel plate I 12 is installed inside the steel sleeve 13 and is fixed to the four-shaft 15 already installed inside the housing 1. An internal spline that can mate with the four-shaft 15 is provided at the center of the steel plate I 12. A steel plate II 2 is fixed at the bottom inside the steel sleeve 13, and a friction plate 11 that can contact the steel plate I 12 is provided on the upper surface of the steel plate II 2. A wave spring 3 is fitted on the four-shaft 15 between the steel plate I 12 and the steel plate II 2, so that the upper end of the wave spring 3 contacts the lower end of the steel plate I 12. The lower end of the wave spring 3 contacts the upper surface of the small pressure plate 14. The small pressure plate 14 is set on the four shafts 15 inside the steel plate II 2. A pressure plate 10 is installed at the lower end of the piston 9. The pressure plate 10 is connected to the lower end face of the piston 9 by bolts. A friction plate 11 that can contact the steel plate I 12 is provided on the lower surface of the pressure plate 10. A butterfly spring 5 is provided between the cover plate 6 and the piston 9. A release bolt 7 that can be connected to the upper end of the piston 9 is provided on the cover plate 6. An external spline that can fit the steel plate I 12 is provided on the upper part of the four shafts 15. A groove that can fit the small pressure plate 14 is provided on the four shafts 15 below the external spline. The small pressure plate 14 is a retaining ring. A groove that facilitates the entry of the bolt head at the lower end of the piston 9 is provided at the center position of the upper end face of the four shafts 15.The brake release bolt 7 is designed in a cross shape, with its upper length shorter than its lower length, to facilitate connection between the lower part of the brake release bolt 7 and the upper end of the piston 9.
Claims
1. A hydraulic transfer case for engineering machinery with a parking brake, comprising a housing, a transmission assembly housed within the housing, the transmission assembly including a four-shaft assembly, a third shaft, a second shaft, and a first shaft arranged parallel to the four-shaft assembly, a large gear and a small gear mounted on the fourth shaft, a large gear and a small gear mounted on the third shaft, a large gear and a small gear mounted on the second shaft, a large gear and a small gear mounted on the second shaft, and a first shaft gear mounted on the first shaft. Both ends of the first shaft extend out of the housing and are connected to an output flange. The large gear of the second shaft is connected to a clutch connecting plate via a clutch transition sleeve. The clutch connecting plate is connected to an inner spline sleeve. The inner spline sleeve is connected to an outer spline sleeve already mounted on the second shaft via static and dynamic friction plates. The end faces of the static or dynamic friction plates are fitted into a first-gear cylinder. The first gear piston end face contacts the clutch, and the four-axis large gear is also connected to the clutch connecting plate through the clutch transition sleeve. The clutch connecting plate is connected to the inner spline sleeve. The inner spline sleeve is connected to the outer spline sleeve already fitted on the four-axis through static friction plates and dynamic friction plates. The end face of the static friction plate or dynamic friction plate contacts the end face of the second gear piston fitted in the second gear cylinder. A second-gear hydraulic clutch composed of the clutch connecting plate, inner spline sleeve, outer spline sleeve, second-gear cylinder, second-gear piston, static friction plate, and dynamic friction plate is provided outside the housing and connected to the four-axis transmission. A first-gear hydraulic clutch composed of the clutch connecting plate, inner spline sleeve, outer spline sleeve, first gear cylinder, first gear piston, static friction plate, and dynamic friction plate is also provided outside the housing and connected to the second-gear transmission. The characteristic is: Outside the housing (1), a parking brake (4) is also provided, which is connected to the four shafts (15) via transmission. It consists of friction plates (11), a disc spring (5), a cover plate (6), a piston (9), and a cylinder (8). The piston (9) is fitted inside the cylinder (8). The cover plate (6) is connected to the housing (1) via the cylinder (8) and a steel sleeve (13). A steel plate I (12) is installed inside the steel sleeve (13). The steel plate I (12) is fixed on the four shafts (15) that are already installed inside the housing (1). A steel plate II (2) is fixed at the bottom inside the steel sleeve (13). A friction plate (11) that can contact steel plate I (12) is provided on the upper surface of steel plate II (2). A wave spring (3) is fitted on the four shafts (15) between steel plate I (12) and steel plate II (2). A pressure plate (10) is installed at the lower end of piston (9). A friction plate (11) that can contact steel plate I (12) is provided on the lower surface of pressure plate (10). A butterfly spring (5) is provided between cover plate (6) and piston (9). A release bolt (7) that can connect to the upper end of piston (9) is provided on cover plate (6).
2. The hydraulic transfer case for engineering machinery with parking brake according to claim 1, characterized in that: An external spline is provided on the upper part of the four shafts (15) to accommodate the steel sheet I (12), and a groove is provided on the four shafts (15) below the external spline to accommodate the small pressure plate (14).
3. A hydraulic transfer case for engineering machinery with a parking brake according to claim 2, characterized in that: The release bolt (7) is set in a cross shape, with its upper length being less than its lower length, so that the lower part of the release bolt (7) can be connected to the upper end of the piston (9).