A transmission for a straw bale baler

Abstract

The utility model relates to straw feed bundling machine technical field, concretely for a kind of transmission device for straw feed bundling machine. Including gearbox and transmission shaft assembly, two transmission shaft assemblies are symmetrically installed in gearbox both sides;The gearbox both ends are equipped with power output shaft and fixed flange;The transmission shaft assembly includes bearing seat, transmission shaft, first bearing and second bearing, first bearing and second bearing are installed at the both ends of transmission shaft, and are installed in bearing seat;The transmission shaft is connected with power output shaft;The both ends of bearing seat are equipped with flange, one end is connected with gearbox flange, and the other end is connected with shell side plate flange. Guarantee the coaxiality of both sides transmission shaft, improve the stability of operation, reduce vibration, improve bearing and shell service life.

Description

Technical Field

[0001] This utility model relates to the field of straw baler technology, specifically a transmission device for a straw baler. Background Technology

[0002] Existing traction-type straw balers (hereinafter referred to as balers) all use universal joint drive shafts or double-sided half-shaft drives for power transmission. The gearbox is located in the middle of the pickup housing, and a bearing seat is fixed on each of the two side plates of the housing. Because the gearbox bracket and the side plate mounting surface are welded structures, the relative position of the gearbox base and the bearing seat holes on both sides cannot be guaranteed. When installing the central gearbox, since the central gearbox is only positioned by the bottom bracket, and the gearbox base is bent and welded without a machined surface, it is impossible to ensure that the output shafts at both ends of the gearbox are concentric with the bearing seat mounting holes on the side plates of the housing. This results in the drive shafts not being coaxial after installation. Therefore, the installed gearbox usually needs to be repeatedly adjusted in terms of installation position and height. However, even after adjustment, it is impossible to accurately measure the result of the adjustment.

[0003] When the baler is working, the drive shaft rotates at nearly 1800 rpm. At such a high speed, the coaxiality of the two drive shafts has a significant impact on the stability of the equipment. When the coaxiality of the two drive shafts is poor, using a universal joint drive shaft will cause excessive vibration during operation, which will deform the housing. When using a double-sided half-shaft drive, the bearings on both sides are prone to overheating, causing the bearings to fail prematurely. Utility Model Content

[0004] To overcome the shortcomings of the prior art, this utility model provides a transmission device for a straw feed baler, which ensures the coaxiality of the transmission shafts on both sides, improves the stability of operation, reduces vibration, and increases the service life of bearings and housings.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A transmission device for a straw baler includes a gearbox and a drive shaft assembly, with two drive shaft assemblies symmetrically mounted on both sides of the gearbox. The gearbox has a power output shaft and a fixed flange at both ends. Each drive shaft assembly includes a bearing housing, a drive shaft, a first bearing, and a second bearing. The first and second bearings are mounted at both ends of the drive shaft and within the bearing housing. The drive shaft is connected to the power output shaft. The bearing housing has flanges at both ends, one end connected to the gearbox flange and the other end connected to the housing side plate flange.

[0007] Furthermore, the first bearing is provided with a left oil seal and a right oil seal at both ends.

[0008] Furthermore, the second bearing is provided with a left oil seal and a right oil seal at both ends.

[0009] Furthermore, both the first and second bearings are tapered roller bearings.

[0010] Furthermore, the outer ring of the first bearing is fixed to the bearing housing, and the inner ring is fixedly connected to the drive shaft through a spacer and a round nut with a locking groove.

[0011] Furthermore, the outer ring of the second bearing is fixed to the bearing housing, and the inner ring is fixedly connected to the drive shaft via the shoulder of the drive shaft.

[0012] Furthermore, the drive shaft and the power output shaft are connected by a spline sleeve.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. Most existing pickup machines use a transmission method that outputs power from the center to both sides. Currently, the two-side transmission is divided into two types: universal joint transmission and shaft transmission. When using universal joint transmission, the transmission shaft does not have axial constraint on the two side plates, so abnormal vibration will occur during use, which will lead to serious fatigue damage to the machine and abnormal damage to the two side plates. Ordinary shaft transmission has extremely high assembly requirements. If the two side transmission shafts are not coaxial with the two side output shafts of the gearbox, it will cause abnormal heating and wear of the two side bearings.

[0015] This invention features two driveshaft assemblies symmetrically mounted on both sides of a gearbox. Each driveshaft assembly includes a bearing housing, a driveshaft, a first bearing, and a second bearing. The first and second bearings are mounted at both ends of the driveshaft and housed within the bearing housing. By fixing the first and second bearings as a single unit using the bearing housing, with one side of the bearing housing connected to the gearbox via a flange and the other side flange connected to the side plate of the housing, this invention effectively positions the gearbox using the output shafts on both sides, ensuring the relative position of the gearbox and the side plate, as well as the coaxiality of the two driveshafts. This fixes the relative positions of the two side plates, the central gearbox, and the driveshaft, forming a stable connection.

[0016] In actual use, belts are installed on both sides of the drive shaft. When the drive shaft rotates, it drives other external structures to rotate through the belts. The bearing housing is fixed to the gearbox and the side plate with bolts to ensure that the axial tension of the drive belts on both sides does not act directly on the side plate, so the side plates will not be damaged. On the contrary, since the drive belts on both sides are fixed on an integrated rigid transmission mechanism, the axial forces of the belts on both sides cancel each other out, which can make the whole device operate more stably, and at the same time, the overall vibration is greatly reduced.

[0017] 2. This utility model uses the same bearing housing to fix the first bearing and the second bearing, which ensures that the two bearings are correctly installed relative to each other. This allows the transmission shaft to be correctly and stably installed on the side plate and to rotate stably relative to the side plate, further reducing the heat generated by the bearing and extending the bearing life.

[0018] 3. Both the first and second bearings of this utility model are tapered roller bearings, which have greater load-bearing capacity and longer service life compared to self-aligning roller bearings and deep groove ball bearings. Moreover, due to the split structure of tapered roller bearings, the bearing clearance can be adjusted to adapt to high-speed and high-load working conditions.

[0019] 4. The first bearing of this utility model is provided with a left oil seal and a right oil seal at both ends. The second bearing is provided with a left oil seal and a right oil seal at both ends. The bearing housing forms two closed spaces around the first and second bearings respectively, so that the two bearings can be fully lubricated during operation. The bearings at both ends of the bearing housing are in a sealed state, and lubricating oil is present in the sealed spaces of the two bearings during operation to facilitate bearing lubrication and heat dissipation. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0021] Figure 2 This is a schematic front sectional view of the structure of this utility model.

[0022] Figure 3 for Figure 2 Enlarged view of point A.

[0023] Figure 4 for Figure 2 Enlarged view of point B.

[0024] In the diagram: 1. Gearbox; 2. Bearing housing; 3. Drive shaft; 4. Side plate; 5. Round nut with locking groove; 6. Left oil seal of first bearing; 7. Spacer; 8. First bearing; 9. Right oil seal of first bearing; 10. Left oil seal of second bearing; 11. Second bearing; 12. Right oil seal of second bearing. Detailed Implementation

[0025] The embodiments of this utility model are described in detail below. To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this utility model or its application or use. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0026] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model 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, and therefore should not be construed as a limitation of this utility model.

[0027] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation", "connection" and "linking" should be interpreted broadly. For example, they can be fixed connections, detachable connections, or integral connections; they can be direct connections or indirect connections through an intermediate medium; and they can be internal connections between two components.

[0028] Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0029] In the description of this utility model, it should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this utility model. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0030] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0031] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0032] like Figure 1-4 As shown, a transmission device for a straw baler includes a gearbox 1 and a drive shaft assembly, with the two drive shaft assemblies symmetrically installed on the left and right sides of the gearbox 1.

[0033] The gearbox 1 has a power output shaft and a fixing flange at both ends. The power output shaft is coaxially connected to a spline sleeve, and the spline sleeve is coaxially connected to a drive shaft 3. The gearbox 1 is fixed on a base between the two housing side plates 4.

[0034] The drive shaft assembly includes a bearing housing 2, a drive shaft 3, a round nut with a locking groove 5, a left oil seal of the first bearing 6, a spacer 7, a first bearing 8, a right oil seal of the first bearing 9, a left oil seal of the second bearing 10, a second bearing 11, and a right oil seal of the second bearing 12.

[0035] During actual installation, the gearbox 1 should first be positioned using the bearing seats 2 on both sides. Then, after adding adjusting shims between the gearbox 1 and the base to support the gearbox 1, the gearbox 1 should be fixed.

[0036] The first bearing 8 and the second bearing 11 are fixed on the two sides inside the bearing housing 2, respectively.

[0037] The first bearing 8 is a tapered roller bearing. The outer ring is fixed to the bearing housing 2, and the inner ring is fixedly connected to the drive shaft 3 through the spacer 7 and the round nut 5 with locking groove.

[0038] The second bearing 11 is a tapered roller bearing, with its outer ring fixed to the bearing housing 2 and its inner ring fixed by a shoulder on the drive shaft 3.

[0039] The first bearing 8 has a left oil seal 6 and a right oil seal 9 at both ends. The second bearing 11 has a left oil seal 10 and a right oil seal 12 at both ends.

[0040] The bearing housing 2 forms two enclosed spaces around the first bearing 8 and the second bearing 11 at both ends, so that the two bearings can be fully lubricated during operation.

[0041] The bearing housing 2 serves to connect the side plates 4 of the two housings to the central gearbox 1, making it a rigid connection. Furthermore, the axial relative position of the drive shaft 3 and the bearing housing 2 is fixed, which improves the overall structural strength. In addition, the shaft drive structure of this invention is generally used in conveying equipment, such as balers and pickers in agricultural machinery.

[0042] Taking straw balers as an example, most existing pickup machines use a transmission method that outputs power from the middle to both sides. Currently, the transmission methods for both sides are divided into two types: universal joint transmission and shaft transmission. When using universal joint transmission, the transmission shaft does not have axial constraint on the side plates, which will cause abnormal vibration during use, resulting in severe fatigue damage to the machine and abnormal damage to the side plates. Ordinary shaft transmission has extremely high assembly requirements. If the transmission shafts on both sides are not coaxial with the output shafts on both sides of the gearbox, it will cause abnormal heating and wear of the bearings on both sides.

[0043] The drive shaft connection structure of this utility model fixes the relative positions of the two side plates 4, the central gearbox 1, and the drive shaft 3, forming a stable connection. In actual use, belts are installed on both sides of the drive shaft. When the drive shaft rotates, it drives other external structures to rotate through the belts. The bearing housing 2 fixes the gearbox 1 and the side plates 4 with bolts, ensuring that the axial tension of the two side drive belts does not directly act on the side plates 4, so the two side plates 4 will not be damaged. On the contrary, since the two side drive belts are fixed on an integrated rigid transmission mechanism, the axial forces of the two side belts cancel each other out, which can make the entire mechanism operate more stably, and the overall vibration is also greatly reduced. Moreover, due to the use of tapered roller bearings and integrated bearing housings, the internal drive shaft 3 and the output shafts on both sides of the gearbox 1 always rotate coaxially, so there is no bearing overheating or abnormal wear. Furthermore, by adjusting the appropriate bearing clearance, the rotational resistance can be reduced to a very small extent, thereby obtaining higher transmission efficiency.

[0044] This utility model fixes the first bearing 8 and the second bearing 11 together with the bearing seat 2. Then, one side of the bearing seat 2 is connected to the gearbox 1 through a flange, and the other side of the bearing seat 2 is connected to the housing side plate 4 through a flange. This is equivalent to positioning the gearbox 1 with the output shafts on both sides of the gearbox 1, ensuring the relative position of the gearbox 1 and the side plate 4 and the coaxiality of the transmission half shafts on both sides.

[0045] This utility model uses the same bearing housing 2 to fix the first bearing 8 and the second bearing 11, which ensures that the two bearings are correctly installed relative to each other. This allows the transmission shaft 3 to be correctly and stably installed on the side plate 4 and to rotate stably relative to the side plate 4, further reducing the heat generated by the bearing and extending the bearing life.

[0046] The first bearing 8 and the second bearing 11 used in this utility model are both tapered roller bearings, which have greater load-bearing capacity and longer service life compared to self-aligning roller bearings and deep groove ball bearings. Moreover, due to the split structure of tapered roller bearings, the bearing clearance can be adjusted to adapt to high speed and high load working conditions.

[0047] The above description is only a part of the specific embodiments of this utility model. The protection scope of this utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in this utility model, based on the technical solution and utility model concept of this utility model, should be included within the protection scope of this utility model.

Claims

1. A transmission device for a straw baler, characterized in that: It includes a gearbox and a driveshaft assembly, with the two driveshaft assemblies symmetrically mounted on both sides of the gearbox; The gearbox is equipped with a power output shaft and a fixed flange at both ends; The drive shaft assembly includes a bearing housing, a drive shaft, a first bearing, and a second bearing. The first bearing and the second bearing are installed at both ends of the drive shaft and are installed inside the bearing housing. The drive shaft is connected to the power output shaft; The bearing housing is provided with flanges at both ends, one end of which is connected to the gearbox flange and the other end of which is connected to the housing side plate flange.

2. The transmission device for a straw baler according to claim 1, characterized in that: The first bearing has a left oil seal and a right oil seal at both ends.

3. The transmission device for a straw baler according to claim 1, characterized in that: The second bearing is provided with a left oil seal and a right oil seal at both ends.

4. The transmission device for a straw baler according to claim 1, characterized in that: Both the first and second bearings are tapered roller bearings.

5. The transmission device for a straw baler according to claim 1, characterized in that: The outer ring of the first bearing is fixed to the bearing housing, and the inner ring is fixedly connected to the drive shaft through a spacer and a round nut with a locking groove.

6. The transmission device for a straw baler according to claim 1, characterized in that: The outer ring of the second bearing is fixed to the bearing housing, and the inner ring is fixedly connected to the drive shaft through the shoulder of the drive shaft.

7. The transmission device for a straw baler according to claim 1, characterized in that: The drive shaft and the power output shaft are connected by a spline sleeve.

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