Brake gearbox

Abstract

The utility model provides a brake gearbox, relates to harvesting machinery equipment technical field, brake gearbox includes first transmission mechanism, main drive mechanism and second transmission mechanism that connect in proper order, first transmission mechanism is used for being connected with the left front wheel body of vehicle body, second transmission mechanism is used for being connected with the right front wheel body of vehicle body, the drum type braking mechanism is connected with the main driving mechanism, and the drum type braking mechanism is connected with the first transmission mechanism and the second transmission mechanism. Due to the fact that the braking force provided by the drum type braking mechanism is larger than that provided by a common brake (a brake belt and pull rod assembly and an external brake wheel), better parking braking can be achieved, meanwhile, abrasion borne by drum type parking braking is small, the service life of the device can be prolonged, and the technical problems existing in the prior art are effectively solved.

Claims

1. A brake gearbox, characterized in that: include: A first transmission mechanism, a main drive mechanism and a second transmission mechanism connected in sequence, wherein the first transmission mechanism is used to connect to the left front wheel body of the vehicle body, and the second transmission mechanism is used to connect to the right front wheel body of the vehicle body; A drum brake mechanism is connected to the main drive mechanism, and the drum brake mechanism is respectively connected to the first transmission mechanism and the second transmission mechanism.

2. The brake gearbox according to claim 1, characterized in that: The main driving mechanism comprises: A housing and an input shaft disposed in the housing, one end of the input shaft passing through the housing to extend to the outside of the housing and used to be connected to a driving source; A first gear and a second gear are arranged on the input shaft at an interval, and the first gear and the second gear rotate synchronously with the input shaft; a third gear, the third gear being rotatably disposed on the input shaft, and the second gear being located between the first gear and the third gear, a first spline being disposed on a side wall of the input shaft between the third gear and the first gear hub, and the first spline and the third gear being an integral structure; The first gear hub is disposed on the input shaft, and the third gear is located between the second gear and the first gear hub; A first engagement sleeve, disposed on the first gear hub; A first toggle assembly is disposed in the housing and is close to the first engagement sleeve and the first spline; A middle transmission assembly is disposed in the housing, a first end of the middle transmission assembly is rotatably connected to the housing, the other end of the middle transmission assembly passes through the housing and is transmission-connected to the drum brake mechanism, and the middle transmission assembly is transmission-connected to the first gear and the second gear; A differential assembly passes through the housing and is rotatably connected to the housing, two opposite ends of the differential assembly are exposed outside the housing, one end of the differential assembly is connected to the first transmission mechanism, and the other end of the differential assembly is connected to the second transmission mechanism; Wherein, the middle transmission assembly located inside the housing is drivingly connected to the differential assembly located inside the housing.

3. The brake transmission according to claim 2, characterized in that: The middle transmission assembly comprises: An intermediate shaft, one end of which is rotatably connected to the interior of the housing, and the other end of which passes through the housing and is drivingly connected to the drum brake mechanism; A fourth gear and a fifth gear are arranged on the intermediate shaft at intervals and are both rotatably connected to the intermediate shaft, a second spline is arranged on the side wall of the intermediate shaft between the fourth gear and the second gear hub, a third spline is arranged on the side wall of the intermediate shaft between the fifth gear and the second gear hub, the second spline and the fourth gear are an integrated structure, and the third spline and the fifth gear are an integrated structure; The second gear hub is disposed on the intermediate shaft and is located between the fourth gear and the fifth gear; A second engagement sleeve, disposed on the second gear hub; A second toggle assembly is disposed in the housing and is close to the second engagement sleeve, the second spline and the third spline; A sixth gear, disposed on the intermediate shaft, the sixth gear being used for driving connection with the differential assembly located inside the housing; An eighth gear is arranged on the intermediate shaft, the eighth gear is located between the fifth gear and the sixth gear, and the eighth gear rotates with the rotation of the intermediate shaft.

4. The brake transmission according to claim 3, characterized in that: The differential assembly comprises: A first half shaft and a second half shaft, one end of the first half shaft and one end of the second half shaft are located inside the housing, the other end of the first half shaft extends in a direction away from the second half shaft, passes through the outside of the housing and is connected to the first transmission mechanism, and the other end of the second half shaft extends in a direction away from the first half shaft, passes through the outside of the housing and is connected to the second transmission mechanism; a differential, arranged inside the housing, wherein one end of the first half-shaft and one end of the second half-shaft are connected via the differential; A seventh gear is arranged on the first half shaft or the second half shaft, and the seventh gear is meshed with the sixth gear.

5. The brake transmission according to claim 4, characterized in that: Also includes: A differential lock, the differential lock being arranged on the differential; A third toggle assembly is disposed in the housing and is close to the differential lock; A reset element is arranged inside the box body, and the third toggle assembly is connected to the box body through the reset element.

6. The brake transmission according to claim 3, characterized in that: Also includes: An oil cylinder, the oil cylinder is arranged on the box body, the oil cylinder has an oil inlet and an oil return port, the oil inlet includes a first oil inlet, a second oil inlet and a third oil inlet, the output end of the oil cylinder passes through the box body and extends into the interior of the box body, the output end of the oil cylinder includes a first output end and a second output end; Among them, the first oil inlet and the oil return port form a first circuit for controlling the extension and contraction of the first output end, the second oil inlet and the oil return port form a second circuit for controlling the extension or contraction of the second output end, the third oil inlet and the oil return port form a third circuit for controlling the contraction or extension of the second output end, the first output end is connected to the first toggle assembly, the second output end is connected to the second toggle assembly, and the first oil inlet, the second oil inlet, the third oil inlet and the oil outlet are all used to be connected to the oil tank.

7. The brake transmission according to claim 6, characterized in that: The first toggle assembly includes: A first shift fork and a first shift fork shaft are connected in sequence, wherein the first shift fork shaft is slidably connected to the box body, and an end of the first shift fork shaft facing away from the first shift fork is connected to the first output end.

8. The brake transmission according to claim 6, characterized in that: The second toggle assembly comprises: A second shift fork and a second shift fork shaft are connected in sequence, the second shift fork shaft is slidably connected to the box body, and one end of the second shift fork shaft away from the second shift fork is connected to the second output end.

9. The brake transmission according to claim 5, characterized in that: The third toggle assembly comprises: A third shift fork and a third shift fork shaft connected in sequence, wherein the third shift fork shaft is slidably connected to the housing, an end of the third shift fork shaft away from the third shift fork passes through the housing and extends to the outside of the housing, and one end of the third shift fork shaft is used to be connected to a power source; Wherein, the reset element is a spring, and the spring is passed through the third fork shaft and is located between the box body and the third fork.

10. The brake transmission according to claim 1, characterized in that: The first transmission mechanism and the main drive mechanism, as well as the main drive mechanism and the second transmission mechanism, are connected in transmission via a transmission shaft and a spline sleeve.

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