Rear-drive transfer case clutch mechanism of harvester

Abstract

The utility model relates to a harvester rear-drive transfer case clutch mechanism which comprises a rotating shaft, the rotating shaft is rotationally installed on a transfer case, a shifting fork is fixed to the end, located in the transfer case, of the rotating shaft, and a shifting fork ring is installed on the shifting fork; a driving arm is fixed to the end, outside the transfer case, of the rotating shaft, a handle is installed at the end, away from the rotating shaft, of the driving arm, and an elastic jacking mechanism is arranged between the handle and the transfer case. A limiting support is fixed to the transfer case and located in the middle of the driving arm, and the inner side wall of the limiting support abuts against the outer side wall of the driving arm. The clutch mechanism handle is locked through the spring jacking mechanism, and the driving arm is reversely pressed through the limiting support, so that the stability of the external structure of the clutch mechanism is improved, internal movement easily caused by vibration of the external driving structure is avoided, and the service life of the transfer case is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of gearbox technology, and in particular to a clutch mechanism for a rear-drive transfer case of a harvester. Background Technology

[0002] A harvester is an integrated machine for harvesting crops. Since harvesters are not designed with rear drive, when encountering muddy fields in actual operation, the rear drive needs to be engaged through the clutch mechanism of the rear drive transfer case to complete the harvest.

[0003] However, because harvesters move a lot during operation, the external structure of the clutch mechanism vibrates, which can easily cause the clutch mechanism to move in unison and reduce the service life of the transfer case.

[0004] Based on the above-mentioned technical problems, the applicant proposes a clutch mechanism for the rear-drive transfer case of a harvester. Utility Model Content

[0005] The purpose of this utility model is to provide a clutch mechanism for the rear-drive transfer case of a harvester to solve the technical problems mentioned in the background art. This purpose is achieved through the following technical solution:

[0006] A clutch mechanism for a rear-drive transfer case of a harvester includes a rotating shaft rotatably mounted on the transfer case. A shift fork is fixed to one end of the rotating shaft inside the transfer case, and a shift fork ring is mounted on the shift fork. A drive arm is fixed to the other end of the rotating shaft outside the transfer case. A handle is mounted on the end of the drive arm away from the rotating shaft, and an elastic clamping mechanism is provided between the handle and the transfer case. A limit bracket is fixed on the transfer case, and the limit bracket is located in the middle of the drive arm, with the inner sidewall of the limit bracket abutting against the outer sidewall of the drive arm.

[0007] Furthermore, the elastic clamping mechanism includes a positioning block, which is fixed on the transfer case and has two positioning grooves. The end of the handle near the transfer case has a receiving hole, in which a spring and a ball are installed. The ball is located on the side of the spring near the transfer case. When the spring engages the ball in the positioning groove, the drive arm is fixed relative to the transfer case.

[0008] Furthermore, an arc-shaped groove is provided on the limiting bracket, and a limiting post is fixed in the middle of the drive arm, with the limiting post sleeved in the arc-shaped groove.

[0009] The technical solutions provided in this application have at least the following technical effects or advantages:

[0010] The clutch mechanism handle is locked by a spring-loaded clamping mechanism, and the drive arm is pressed in the opposite direction by a limit bracket. This improves the stability of the external structure of the clutch mechanism, avoids internal cross-movement caused by vibration of the external drive structure, and extends the service life of the transfer case. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0012] Figure 1 This is a schematic diagram of the structure of an embodiment of this application;

[0013] Figure 2 for Figure 1 A magnified view of a portion of the image;

[0014] Figure 3 This is a schematic diagram illustrating the operational principle of an embodiment of this application;

[0015] Figure 4 This is a schematic diagram of the drive arm and handle structure in an embodiment of this application.

[0016] Reference numerals in the attached drawings: 1. Rotating shaft; 2. Shift fork; 3. Shift fork ring; 4. Drive arm; 41. Limiting post; 5. Handle; 51. Accommodating hole; 6. Limiting bracket; 61. Arc groove; 7. Transfer case; 71. Clutch case; 72. Positioning block; 721. Positioning groove. Detailed Implementation

[0017] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0018] like Figure 1-4 The diagram shows a rear-drive transfer case clutch mechanism for a harvester, including a rotating shaft 1 rotatably mounted on a transfer case 7. The transfer case 7 is a rectangular housing with an input shaft mounted at its lower end and an output shaft mounted at its upper end. A clutch housing 71 is mounted at the input shaft of the transfer case 7, and the rotating shaft 1 is rotatably mounted on the clutch housing 71 via two bearings.

[0019] like Figure 3 As shown, a shift fork 2 is fixed to one end of the rotating shaft 1 inside the clutch housing 71. A shift fork ring 3 is mounted on the shift fork 2. An inner keyway is formed on the inner wall of the shift fork ring 3. When the rotating shaft 1 rotates counterclockwise, the shift fork 2 drives the shift fork ring 3 to move to the right, connecting the two splined shafts and realizing the connection of the transfer case 7. When the rotating shaft 1 rotates clockwise, the shift fork 2 drives the shift fork ring 3 to move to the left, separating the two splined shafts and realizing the separation of the transfer case 7. The specific structure and principle of the clutch mechanism are existing technologies and will not be described in detail here.

[0020] like Figure 1-4 As shown, a drive arm 4 is fixed at one end of the rotating shaft 1 outside the transfer case 7. A handle 5 is installed at the end of the drive arm 4 away from the rotating shaft 1. By rotating the drive arm 4 through the handle 5, the rotating shaft 1 can be driven to rotate, thereby realizing the action of the clutch mechanism.

[0021] A resilient clamping mechanism is installed between the handle 5 and the transfer case 7. This mechanism includes a positioning block 72, which is fixed to the side of the transfer case 7. The positioning block 72 has two positioning grooves 721. One groove 721 is located where the handle 5 is when the clutch is engaged, and the other groove 721 is located where the handle 5 is when the clutch is disengaged. A receiving hole 51 is provided at the end of the handle 5 near the positioning block 72. A spring (not shown) and a ball bearing (not shown) are installed in the receiving hole 51. The ball bearing is located on the side of the spring closest to the transfer case, and its radius is greater than the depth of the positioning groove 721. When the spring presses the ball bearing into the positioning groove 721, the drive arm 4 is fixed relative to the transfer case 7.

[0022] like Figure 1 , Figure 2 , Figure 4 As shown, a U-shaped limiting bracket 6 is fixed on the transfer case 7. The limiting bracket 6 is installed in the middle of the drive arm 4, and the inner side wall of the limiting bracket 6 abuts against the outer side wall of the drive arm 4, thereby cooperating with the elastic clamping mechanism to improve the stability of the position of the drive arm 4.

[0023] Preferably, the limiting bracket 6 has an arc-shaped groove 61, and the middle part of the drive arm 4 is fixed with a limiting post 41. The limiting post 41 is sleeved in the arc-shaped groove 61. When the drive arm 4 is moved, the limiting post 41 slides along the arc-shaped groove 61, which further improves the stability of the drive arm 4.

[0024] The technical solutions provided in this application have at least the following technical effects or advantages:

[0025] The clutch mechanism handle is locked by a spring-loaded clamping mechanism, and the drive arm is pressed in the opposite direction by a limit bracket. This improves the stability of the external structure of the clutch mechanism, avoids internal cross-movement caused by vibration of the external drive structure, and extends the service life of the transfer case.

[0026] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A clutch mechanism for a rear-drive transfer case of a harvester, characterized in that, The device includes a rotating shaft rotatably mounted on a transfer case. A shift fork is fixed to one end of the rotating shaft inside the transfer case, and a shift fork ring is mounted on the shift fork. A drive arm is fixed to the other end of the rotating shaft outside the transfer case. A handle is mounted on the end of the drive arm away from the rotating shaft, and an elastic clamping mechanism is provided between the handle and the transfer case. A limit bracket is fixed on the transfer case, located in the middle of the drive arm, and the inner wall of the limit bracket abuts against the outer wall of the drive arm.

2. The clutch mechanism of a harvester rear drive transfer case according to claim 1, characterized in that, The elastic clamping mechanism includes a positioning block, which is fixed on the transfer case and has two positioning slots. The handle has a receiving hole at one end near the transfer case, and a spring and a ball are installed in the receiving hole. The ball is located on the side of the spring near the transfer case. When the spring engages the ball in the positioning slot, the drive arm is fixed relative to the transfer case.

3. The clutch mechanism of a harvester rear drive transfer case according to claim 1, characterized in that, The limiting bracket has an arc-shaped groove, and a limiting post is fixed in the middle of the driving arm. The limiting post is sleeved in the arc-shaped groove.

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