Novel spherical transmission clutch

Abstract

The utility model relates to the technical field of agricultural machinery equipment, in particular to a novel spherical transmission clutch, which comprises a connecting sleeve and a dynamic friction disc which are respectively connected with a passive power input shaft and a driving power input shaft, the dynamic friction disc is provided with a hemispherical connector, and four hemispherical grooves are evenly distributed in the side face of the connector and used for containing steel balls. Four semi-cylindrical long grooves are formed in the inner side wall of the connecting sleeve, can be in sliding connection with the steel balls and are axially driven by the steel balls; according to the transmission mechanism, continuous transmission can be kept under the condition that the driving power input shaft and the driven power input shaft are not concentric, the transmission mechanism is suitable for a pickup device of a large-scale bundling machine, transmission can be kept without keeping a main shaft of the bundling machine concentric with a pickup device shaft, and the damage rate of a clutch in the transmission mechanism of the pickup device can be greatly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of agricultural machinery and equipment, in particular to a novel spherical transmission clutch. Background Art

[0002] A baler is a commonly used agricultural machinery, which can be used to pick up and bale straw, wheat straw, cotton stalks, corn stalks and other straw as well as natural forage grass, integrating multiple functions of harvesting and baling. The work of the baler is divided into the steps of picking up and compressing. In the picking step, the picker at the front end of the baler is required to pick up the straw, forage grass, etc. on the ground and feed them into the mechanism. If the feeding amount is too large and the structure is blocked, it will have a greater impact on the power mechanism of the picker, and in severe cases it will cause damage to the picker parts. To prevent this situation, a clutch can be set in the power transmission structure of the picker to avoid damage to the picker mechanism.

[0003] There is a patent with application number CN202220101852.X, which discloses a traction-type large square baler pick-up overload protection device, including a picking active mechanism, a picking overload protector and a picking transmission mechanism; the picking active mechanism is connected to the external traction power transmission, and the power transmission part of the picking active mechanism is connected to the picking transmission mechanism through the picking overload protector, and the picking power wheel of the picking transmission mechanism transmits the picking power to the picking mechanism; the patent sets a clutch as an overload protection when the external traction power is transmitted. When the picking amount is too large and the picking power wheel is subjected to a force exceeding the set value, the clutch will disconnect the connection with the picking transmission shaft and cut off the power of the picking mechanism, thereby protecting both the external traction power and the traction mechanism from overload; however, its clutch structure is a through clutch, and when the pick-up moves dynamically, there is deformation, which will cause the main shaft and the pick-up shaft to be out of center; with the frequent lifting and lowering of the pick-up during use, the clutch is easily damaged, which in turn affects the working efficiency of the baler. Utility Model Content

[0004] The utility model aims to provide a novel spherical transmission clutch capable of solving the problem of non-concentric transmission.

[0005] Based on the above purpose, the utility model adopts the following technical solutions:

[0006] A novel spherical transmission clutch comprises a dynamic friction disc connected to a primary power input shaft and a connecting sleeve connected to a passive power input shaft, and is characterized in that a hemispherical connecting head is vertically arranged on the dynamic friction disc, the connecting sleeve is arranged on the outside of the connecting head, and the connecting sleeve and the connecting head are clearance-matched; the connecting head and the connecting sleeve are connected through a plurality of steel balls.

[0007] Preferably, the connecting sleeve is formed by splicing two cylindrical structures of different diameters front and back, the smaller diameter section of the connecting sleeve is connected to the passive power input shaft, and the larger diameter section is connected to the connector of the dynamic friction disc.

[0008] Preferably, a plurality of hemispherical grooves are evenly distributed on the side of the connecting head, and a steel ball is arranged in each hemispherical groove; a semi-cylindrical long groove matching the spherical groove is arranged on the inner side wall of the connecting sleeve, and the long groove is arranged along the length direction of the connecting sleeve; the part of the steel ball protruding from the hemispherical groove is slidably embedded in the long groove.

[0009] Preferably, the hemispherical grooves are all arranged at the position where the horizontal cross-section diameter of the connector is the largest.

[0010] Preferably, at least four hemispherical grooves are evenly distributed on the side of the connector, and at least four semi-cylindrical long grooves are evenly distributed on the inner side wall of the connector sleeve and the number is the same as the hemispherical grooves.

[0011] Preferably, a keyway and a through hole are provided on the inner side surface of the other end of the connecting sleeve opposite to the dynamic friction disc, and the connecting sleeve is fixedly connected to the passive power input shaft by a key and a bolt, and a fixed plate is fixedly connected to the other end of the dynamic friction disc opposite to the connecting sleeve, and a keyway and a through hole are provided on the inner side surface of the fixed plate, and the fixed plate is fixedly connected to the active power input shaft by a key and a bolt.

[0012] Preferably, the inclination angle between the central axis of the dynamic friction disc and the central axis of the connecting sleeve is in the range of 0-15°.

[0013] The beneficial effects of the utility model are:

[0014] The utility model adopts steel balls as the transmission of the clutch, and a hemispherical groove is provided on the connecting head of the dynamic friction disk, and a semi-cylindrical long groove is provided in the connecting sleeve to accommodate the steel balls. When the dynamic friction disk fixedly connected to the active power input shaft rotates, the steel balls are driven to rotate synchronously, and the steel balls drive the connecting sleeve to rotate through the long groove, and the connecting sleeve then drives the passive power input shaft fixedly connected to it to rotate, thus completing the transmission process from the active power input shaft to the passive power input shaft; since the steel balls can slide in the long groove, and the position of the steel balls in the long groove does not affect the transmission effect, even if eccentricity occurs between the active power input shaft and the passive power input shaft, and the central axes of the two shafts are not colinear, the transmission can still be maintained, thereby realizing the non-concentric transmission connection of the two shafts.

[0015] The dynamic friction disc connector provided in the utility model can rotate freely with the connecting sleeve within a range of 15°, and there is no sticking phenomenon during rotation, thereby maintaining reliable continuous transmission under complex stress and deformation environments. Through the clutch structure of the utility model, when used in the pick-up of a large baler, the failure rate can be reduced by more than 80%, thereby effectively improving product reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is the assembly drawing of the utility model;

[0017] Figure 2 for Figure 1 Sectional view in the direction of BB mark;

[0018] Figure 3 This is a schematic diagram of the connecting sleeve structure of the utility model;

[0019] Figure 4 This is a schematic diagram of the structure of the dynamic friction disc and the steel ball of the utility model;

[0020] Figure 5 It is a schematic diagram of the assembly structure of the connecting sleeve and the dynamic friction disc of the utility model.

[0021] In the figure: fixed plate 1; dynamic friction plate 2; sprocket shaft 3; bolt 4; brake spring 5; connecting head 6; outer pressure plate 7; friction plate 8; connecting key 9; bolt 10; nut 11; locking nut 12; steel ball 13; sprocket 14; mounting plate 15; round seat 16; outer spherical ball bearing 17; bolt 18; washer 19; locking nut 20; main shaft 21; long groove 22; connecting head 23. DETAILED DESCRIPTION

[0022] The following is a further explanation of the present invention in conjunction with specific embodiments. Figure 1 As shown, this embodiment is a clutch for connecting the pick-up sprocket shaft 3 of the baler with the main shaft 21, including a connecting sleeve 6 fixedly connected to the sprocket shaft 3, and a dynamic friction plate 2 fixedly connected to the main shaft 21; the sprocket shaft 3 serves as the passive power input shaft of the clutch, and the main shaft 21 serves as the active power input shaft of the clutch. The power of the main shaft 21 can be transmitted to the sprocket shaft 3 through the clutch, driving the sprocket 14 to rotate.

[0023] like Figure 1 and Figure 3 As shown, the connecting sleeve 6 includes two sections with different diameters. The section with a smaller diameter is sleeved on the outside of the sprocket shaft 3 and is fixedly connected to the sprocket shaft 3 through a connecting key 9 and a bolt 10. The connecting sleeve 6 and the sprocket shaft 3 can adopt a transition fit or an interference fit; Figure 4 As shown, a cylindrical protrusion is vertically arranged in the middle of the dynamic friction disc 2, and a hemispherical connecting head 23 is arranged at the end of the protrusion; the dynamic friction disc 2 is connected to a section of the connecting sleeve 6 with a larger diameter through the connecting head 23, and there is a clearance fit between the connecting sleeve 6 and the connecting head 23, and the central axis of the connecting sleeve 6 and the central axis of the dynamic friction disc 2 can be inclined at an angle of 15°.

[0024] like Figure 2 and Figure 4As shown, four hemispherical grooves are evenly arranged on the side of the connector 23, and a steel ball 13 is arranged in each hemispherical groove; Figure 3 As shown, four long grooves 22 are evenly distributed on a section of the inner wall of the connecting sleeve 6 with a larger diameter; the long groove 22 is a semi-cylindrical structure, one end of which is arranged in the connecting sleeve 6 and the other end is connected to the end surface of the connecting sleeve 6.

[0025] like Figure 5 As shown, the steel ball 13 on the connecting head 23 can enter the long groove 22 from the open end of the long groove 22, so that the part of the steel ball 13 protruding from the hemispherical groove extends into the long groove 22 and is connected with the inner wall of the long groove 22; the cross-sectional circumferential radius of the long groove 22, the radius of the hemispherical groove and the radius of the steel ball 13 are all matched, so that the steel ball 13 can slide in the long groove 22 along the length direction of the long groove 22 as the connecting head 23 and the connecting sleeve 6 are relatively tilted.

[0026] When this embodiment is actually used, the dynamic friction disc 2 is first fixedly connected to the main shaft 21 through the fixed disc 1, and the friction plate, the outer pressure plate 7 and the dynamic friction disc 2 are fixedly connected by the bolts 4, the brake spring 5 and the locking nut 12; and the connecting sleeve 6 is fixedly connected to the sprocket shaft 3 by the bolts 10, the nuts 11 and the connecting keys, the sprocket shaft 3 is connected to the sprocket 14, and is linked to the circular seat 16 through the outer spherical ball bearing 17, and then fixedly connected to the mounting plate 15 by the bolts 18, the washers 19 and the locking nuts 20, and fixedly installed on the baler; after the steel balls 13 are arranged in each hemispherical groove of the connecting head 23, the connecting sleeve 6 is sleeved on the outside of the connecting head 23, so that each steel ball 13 enters a long groove 22.

[0027] After completing the setting of the transmission mechanism and the clutch, the main shaft 21 can be driven to work; when the main shaft 21 rotates, it drives the dynamic friction disc 2 to rotate along the central axis, and the connecting head 23 of the dynamic friction disc 2 drives the steel ball 13 to rotate through the hemispherical groove; the steel ball 13 is embedded in the long groove 22, and can drive the connecting sleeve 6 to rotate through the long groove 22; because the connecting sleeve 6 is fixedly connected to the sprocket shaft 3, it can further drive the sprocket shaft 3 to rotate along its central axis.

[0028] During the operation of the baler, when the central axes of the main shaft 21 and the sprocket shaft 3 are not aligned, the connecting head 23 is tilted at a certain angle in the connecting sleeve 6. At this time, the steel ball 13 is affected by the hemispherical groove and slides in the long groove 22. According to the direction and angle of inclination, the steel ball 13 can adaptively slide inward or outward in the long groove 22 in real time to match the displacement of the hemispherical groove on the connecting head 23 relative to the connecting sleeve 6. At the same time, when the lifting and lowering of the pickup causes a small displacement of the clutch part, the steel ball 13 can also be synchronously displaced slightly in the long groove 22 with the movement of the dynamic friction disc 2, and will not be damaged due to the movement of the pickup.

[0029] The above description is only a further explanation of the present invention in combination with specific embodiments. All descriptions do not limit the protection scope of the present invention. Any changes or replacement solutions that can be easily thought of by technicians in this field within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A novel spherical transmission clutch, comprising a dynamic friction disc connected to the active power input shaft and a connecting sleeve connected to the passive power input shaft, characterized in that: A hemispherical connector is vertically arranged on the dynamic friction disc, and the connecting sleeve is sleeved on the outside of the connecting head, and the connecting sleeve and the connecting head are clearance-matched; the connecting head and the connecting sleeve are connected through a plurality of steel balls.

2. The novel spherical transmission clutch according to claim 1 is characterized in that: The connecting sleeve is formed by splicing two cylindrical structures with different diameters front and back. The smaller diameter section of the connecting sleeve is connected to the passive power input shaft, and the larger diameter section is connected to the connector of the dynamic friction disc.

3. The new spherical transmission clutch according to claim 2 is characterized in that: The side of the connector is evenly distributed with a plurality of hemispherical grooves, each of which is provided with a steel ball; the inner wall of the connecting sleeve is provided with a semi-cylindrical long groove that cooperates with the spherical groove, and the long groove is arranged along the length direction of the connecting sleeve; the part of the steel ball protruding from the hemispherical groove is slidably embedded in the long groove.

4. The new spherical transmission clutch according to claim 3 is characterized in that: The hemispherical grooves are all arranged at the position where the horizontal cross-section diameter of the connector is the largest.

5. The new spherical transmission clutch according to claim 4 is characterized in that: There are at least four hemispherical grooves evenly distributed on the side of the connector, and there are at least four semi-cylindrical long grooves evenly distributed on the inner side wall of the connecting sleeve, and the number of the semi-spherical grooves is the same as that of the hemispherical grooves.

6. The novel spherical transmission clutch according to claim 5 is characterized in that: A keyway and a through hole are arranged on the inner side surface of the other end of the connecting sleeve opposite to the dynamic friction disc, and the connecting sleeve is fixedly connected to the passive power input shaft through a key and a bolt, and a fixed plate is fixedly connected to the other end of the dynamic friction disc opposite to the connecting sleeve, and a keyway and a through hole are arranged on the inner side surface of the fixed plate, and the fixed plate is fixedly connected to the active power input shaft through a key and a bolt.

7. The new spherical transmission clutch according to claim 6 is characterized in that: The inclination angle range between the central axis of the dynamic friction disc and the central axis of the connecting sleeve is 0-15°.

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