A gear mechanism for intermittent transmission and a baler

Abstract

This utility model relates to an intermittent transmission gear mechanism and a baler, comprising: a frame, on which a rotatable drive shaft and a transmission shaft are supported; a drive gear, fixed on the drive shaft, the drive gear having a gear ring and a locking ring, the gear ring including several main tooth sections, with a toothless section between adjacent main tooth sections, the locking ring including a main locking surface in the same radial direction as the toothless section; and a driven gear, fixed on the transmission shaft, the driven gear having a driven tooth section that can cooperate with the main tooth section and a driven locking surface that can cooperate with the main locking surface on its outer periphery; the advantage is that by setting a partial main tooth section and a locking cone surface on the drive gear, which cooperate with the locking plane and partial driven tooth section of the driven gear, a simple and reliable intermittent transmission is successfully achieved, significantly improving the positioning accuracy and action repeatability of the intermittent transmission, and is particularly suitable for agricultural machinery (such as baler knotters) with strict timing control requirements.

Description

Technical Field

[0001] This utility model relates to the field of agricultural machinery transmission technology, and in particular to a gear mechanism for intermittent transmission and a baler. Background Technology

[0002] In the field of agricultural machinery, many actuators do not operate continuously but rather require cyclical actions performed according to a specific rhythm. For example, in agricultural square balers, the knotter needs to sequentially complete processes such as clamping the thread, winding the thread, knotting, and cutting. These operations require the drive components to start and stop at precise times to ensure that each process is coordinated and reliably completed. Therefore, how to efficiently and accurately convert the continuous rotational motion provided by the power source (such as an electric motor or internal combustion engine) into intermittent output motion has become a key issue in the design of the transmission system for such equipment.

[0003] Currently, common mechanisms for intermittent transmission include Geneva mechanisms, cam-type intermittent indexing mechanisms, and incomplete gear mechanisms. Among them, Geneva mechanisms are simple in structure and easy to manufacture, but their motion law is fixed, making it difficult to flexibly adjust the dwell time and rotation angle ratio. Cam-type intermittent mechanisms can achieve high-precision indexing and complex motion laws, but they have high requirements for machining accuracy and assembly, resulting in higher costs. Incomplete gear mechanisms, by setting partial tooth segments on the driving wheel, can transmit power during meshing and interrupt transmission when there are no tooth segments. They have advantages such as compact structure and adjustable transmission ratio, and therefore have been used to some extent in medium and low speed intermittent transmission applications.

[0004] However, traditional incomplete gear mechanisms lack an effective locking mechanism during the resting phase. When the driving wheel is in the toothless section, the driven wheel may rotate slightly or retract under the influence of inertia, external load, or vibration, leading to a decrease in output position accuracy and, in severe cases, even causing malfunctions or failures. This problem is particularly prominent in high-load, high-impact agricultural operating environments such as balers.

[0005] Therefore, this case is brought. Utility Model Content

[0006] The purpose of this invention is to provide a gear mechanism and baler with intermittent transmission, which can achieve reliable intermittent transmission and effectively lock the driven parts during rest periods, so as to meet the needs of agricultural machinery for highly reliable intermittent motion control.

[0007] To achieve the above objectives, the technical solution of this utility model is as follows:

[0008] A gear mechanism for intermittent transmission, comprising: The frame supports a rotatable drive shaft and a transmission shaft. A drive gear is fixed on the drive shaft. The drive gear is provided with a gear ring and a locking ring. The gear ring includes several main tooth sections, and there is a toothless section between two adjacent main tooth sections. The locking ring includes a main locking surface that is in the same radial direction as the toothless section. The driven gear is fixed on the transmission shaft. The outer periphery of the driven gear is provided with a driven tooth area that can cooperate with the main tooth area and a driven locking surface that can cooperate with the main locking surface.

[0009] Furthermore, the gear ring includes a first gear ring and a second gear ring, with the first gear ring located inside the locking ring and the locking ring located inside the second gear ring. The first gear ring has several segments of first main tooth area, and the second gear ring has several segments of second main tooth area. The driven gear includes a first driven gear and a second driven gear. The outer periphery of the first driven gear is provided with a first driven tooth area and a first driven locking surface. The first driven tooth area can mesh with a first main tooth area, and the first driven locking surface can cooperate with the main locking surface. The outer periphery of the second driven gear is provided with a second driven tooth area and a second driven locking surface. The second driven tooth area can mesh with a second main tooth area, and the second driven locking surface can cooperate with the main locking surface.

[0010] Furthermore, the first main tooth area and the second main tooth area are arranged in a staggered manner.

[0011] Furthermore, the main locking surface is a conical surface, while the secondary locking surface is a plane.

[0012] A baler, characterized in that it includes the aforementioned intermittent transmission gear mechanism.

[0013] The advantages of this utility model are:

[0014] 1. This solution achieves a simple yet reliable intermittent transmission by setting a partial main tooth segment and a locking cone surface on the driving gear, which cooperate with the locking plane and a partial driven tooth segment of the driven gear. When the main tooth segment meshes with the driven tooth segment, power is transmitted to drive the transmission shaft to rotate; when it rotates to the toothless segment, the locking cone surface presses against the locking plane to form an effective lock, allowing the output shaft to stop stably and avoiding mis-rotation caused by inertia, vibration, or external load. This significantly improves the positioning accuracy and repeatability of the intermittent transmission, making it particularly suitable for agricultural machinery (such as baler knotters) with strict timing control requirements.

[0015] 2. At the same time, the “conical-plane” locking mechanism ensures reliability during locking and smoothness during disengagement, effectively balancing performance, durability and economy, and solving the technical problem of unreliable positioning during the rest period of traditional incomplete gear mechanisms.

[0016] 3. By setting tooth segments and locking cone surfaces on the circumference of the drive gear at different positions, a single input and multi-component output can be achieved. The intermittent motion of the multiple components can meet specific operational requirements, such as the knotting action of a knotter. Attached Figure Description

[0017] Figure 1 This is a simplified structural diagram of the drive gear in the embodiment; Figure 2 This is a simplified structural diagram of the first driven gear in the embodiment; Figure 3 This is a simplified structural diagram of the second driven gear in the embodiment; Figure 4 This is a simplified assembly diagram of the intermittent transmission gear mechanism in the embodiment; Figure 5 for Figure 4 A simplified diagram of the intermediate gear mechanism in the locked state; Figure 6 for Figure 4 A simplified diagram of the gear mechanism in the transmission state;

[0018] Label Explanation 1. Driving gear; 101. First main gear area; 102. Second main gear area; 103. Main locking surface; 2. First driven gear; 201. First driven gear area; 202. First driven gear locking surface; 3. Second driven gear; 301. Second driven gear area; 302. Second driven gear locking surface; 4. Driving shaft; 5. Transmission shaft one; 6. Transmission shaft two. Detailed Implementation

[0019] The present invention will be further described in detail below with reference to the embodiments. It should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer" etc. indicated by the accompanying drawings are only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0020] This embodiment proposes an intermittent transmission gear mechanism, such as... Figure 4 As shown, it includes a frame, on which a rotatable drive shaft 4, a first transmission shaft 5, and a second transmission shaft 6 are supported by bearings. A drive gear 1 is fixed on the drive shaft 4, a first driven gear 2 is fixed on the first transmission shaft 5, and a second driven gear 3 is fixed on the second transmission shaft 6.

[0021] like Figure 4As shown, the driving gear 1 has a first gear ring, a locking ring, and a second gear ring arranged concentrically from the inside out. The first gear ring includes two segments of first main tooth area 101, with a toothless area between the two segments. The second gear ring includes two segments of second main tooth area 102, with a toothless area between the two segments. The locking ring is an annular surface, which serves as the main locking surface 103.

[0022] like Figure 2 As shown, the outer periphery of the first driven gear 2 is provided with a first driven tooth region 201 and a first driven locking surface 202. The first driven tooth region 201 can mesh with the first main tooth region 101, and the first driven locking surface 202 can cooperate with the main locking surface 103 to lock the first driven gear 2. Figure 3 As shown, the second driven gear 3 has a second driven tooth area 301 and a second driven locking surface 302 on its outer periphery. The second driven tooth area 301 can mesh with the second main tooth area 102, and the second driven locking surface 302 can cooperate with the main locking surface 103.

[0023] From the perspective of the motion of the first driven gear 2, its motion process is as follows:

[0024] When the drive shaft 4 drives the drive gear 1 to rotate, and the first driven gear 2's first locking surface 202 is engaged with the main locking surface 103, the drive gear 1 rotates for a certain period of time, but the first driven gear 2 remains stationary, resulting in no power output from the drive shaft 5. Figure 5 As shown.

[0025] After the drive shaft 4 drives the drive gear 1 to rotate through a certain angle, when the first main tooth area 101 on the drive gear 1 meshes with the first driven tooth area 201 of the first driven gear 2, the first driven gear 2 rotates, causing the transmission shaft 5 to output power. Figure 6 As shown.

[0026] After the drive shaft 4 drives the drive gear 1 to continue rotating through a certain angle, when the first driven locking surface 202 of the first driven gear 2 re-engages with the main locking surface 103, the drive gear 1 rotates, but the first driven gear 2 remains stationary, causing the transmission shaft 5 to no longer output power. Figure 5 As shown.

[0027] From the perspective of the motion of the second driven gear 3, its motion process is as follows:

[0028] When the drive shaft 4 drives the drive gear 1 to rotate, and the second driven gear 3's second locking surface 302 is engaged with the main locking surface 103, the drive gear 1 rotates for a certain period of time, but the second driven gear 3 remains stationary, resulting in no power output from the drive shaft 6. Figure 5 As shown.

[0029] After the drive shaft 4 drives the drive gear 1 to rotate through a certain angle, when the second main tooth area 102 on the drive gear 1 meshes with the second driven tooth area 301 of the second driven gear 3, the second driven gear 3 rotates, causing the transmission shaft 6 to output power. Figure 6 As shown.

[0030] After the drive shaft 4 drives the drive gear 1 to continue rotating through a certain angle, when the second driven gear 3's second locking surface 302 re-engages with the main locking surface 103, the drive gear 1 rotates for a certain period of time, but the second driven gear 3 remains stationary, resulting in no power output from the drive shaft 6. Figure 5 As shown.

[0031] Preferably, in this embodiment, the first main gear area 101 and the second main gear area 102 are staggered, so that the first driven gear 2 and the second driven gear 3 can alternately enter the transmission state and the locking state within a certain angle range of the rotation of the drive shaft 4, so as to meet the operation requirements. In addition, the main locking surface 103 in this embodiment is a conical surface. The locking of the conical surface and the plane ensures the reliability of locking and the smoothness of disengagement.

[0032] This embodiment also proposes a baling machine, including the aforementioned intermittent transmission gear mechanism.

[0033] The above embodiments are only used to explain the concept of this utility model, and are not intended to limit the protection of this utility model. Any non-substantial modifications made to this utility model using this concept should fall within the protection scope of this utility model.

Claims

1. A gear mechanism for intermittent transmission, characterized in that, include: The frame supports a rotatable drive shaft and a transmission shaft. A drive gear is fixed on the drive shaft. The drive gear is provided with a gear ring and a locking ring. The gear ring includes several main tooth sections, and there is a toothless section between two adjacent main tooth sections. The locking ring includes a main locking surface in the same radial direction as the toothless section. The driven gear is fixed on the transmission shaft. The outer periphery of the driven gear is provided with a driven tooth area that can cooperate with the main tooth area and a driven locking surface that can cooperate with the main locking surface.

2. The intermittent transmission gear mechanism as described in claim 1, characterized in that, The gear ring includes a first gear ring and a second gear ring, with the first gear ring located inside the locking ring and the locking ring located inside the second gear ring. The first gear ring has several segments of first main tooth area, and the second gear ring has several segments of second main tooth area. The driven gear includes a first driven gear and a second driven gear. The outer periphery of the first driven gear is provided with a first driven tooth area and a first driven locking surface. The first driven tooth area can mesh with a first main tooth area, and the first driven locking surface can cooperate with the main locking surface. The outer periphery of the second driven gear is provided with a second driven tooth area and a second driven locking surface. The second driven tooth area can mesh with a second main tooth area, and the second driven locking surface can cooperate with the main locking surface.

3. The intermittent transmission gear mechanism as described in claim 2, characterized in that, The first and second main tooth areas are arranged in a staggered manner.

4. The intermittent transmission gear mechanism as described in claim 1, characterized in that, The main locking surface is a conical surface, and the secondary locking surface is a plane.

5. A baling machine, characterized in that, Including the intermittent transmission gear mechanism as described in any one of claims 1 to 4.

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