Agricultural machinery gearbox clutch structure

Abstract

A clutch structure of an agricultural machinery gearbox relates to the technical field of agricultural machinery gearboxes, realizes structure simplification and miniaturization of clutches, and comprises a gearbox body and a transmission shaft rotationally connected in the gearbox body, one end of the transmission shaft is sleeved with a transmission shaft sleeve, and a first mounting hole is formed in the center of the side, where the transmission shaft sleeve is located, of the transmission shaft. A second mounting hole is formed in the radial direction of the transmission shaft, and the first mounting hole is communicated with the second mounting hole; a pressure plate is further arranged on the gearbox body; a clutch pin matched with the first mounting hole is arranged on one surface of the pressure plate; the diameter of one side, facing the bottom of the first mounting hole, of the clutch pin in the second mounting hole is gradually reduced to form a clutch section; a clamping bead is arranged in the second mounting hole, and when the clutch pin reciprocates in the first mounting hole, the clutch section can push the clamping bead to enable the transmission shaft sleeve to be combined with or separated from the transmission shaft.

Description

TECHNICAL FIELD

[0001] The utility model relates to agricultural machinery transmission technology field, concretely relates to a kind of agricultural machinery transmission clutch structure. BACKGROUND

[0002] Clutch is the commonly used component in mechanical transmission, can separate or engage transmission system at any time. Its basic requirements are: smooth engagement, rapid and thorough separation;Convenient adjustment and repair;Small outer dimension;Small mass;Good wear resistance and sufficient heat dissipation capacity;Convenient and labor-saving operation, commonly divided into two categories of toothed and friction type.

[0003] The same is true for clutch in the field of agricultural equipment technology, the application number CN202410907562.8 invention application discloses a kind of clutch and small agricultural machinery power system, wherein clutch is through the cooperation of first driving friction disc and second driving friction disc with first passive friction disc and second passive friction disc when working.

[0004] However, in the structure, the cooperation of multiple transmission shafts and multiple friction discs that need to be mutually sleeved can realize the separation and combination of transmission system;Among them, in order to ensure that the combination of friction disc is more stable, the surface or volume of friction disc needs to be enlarged, based on this, it is not conducive to realize the miniaturization of clutch mechanism. UTILITY MODEL CONTENTS

[0005] I. Technical problems solved

[0006] The utility model provides a kind of agricultural machinery transmission clutch structure for the deficiency of prior art, by the cooperation of clutch pin and steel ball in installation shaft, traditional toothed or friction type clutch is converted, structure is simple, and volume is smaller, more conducive to the miniaturization of equipment.

[0007] II. Specific technical solutions

[0008] A kind of agricultural machinery transmission clutch structure, including transmission box body and the transmission shaft rotationally connected in transmission box body, the one end of the transmission shaft is equipped with transmission shaft sleeve, the first installation hole is opened in the center position of the transmission shaft on the side where transmission shaft sleeve is located, second installation hole is arranged along the radial direction of the transmission shaft, and first installation hole and second installation hole are communicated;The transmission box body is also provided with pressure disc, one side of the pressure disc is provided with clutch pin matched with first installation hole;The diameter of clutch pin gradually reduces towards the side of the bottom of first installation hole and forms clutch section at the position of second installation hole;Card bead is arranged in second installation hole, when clutch pin reciprocates in first installation hole, clutch section will push card bead to make transmission shaft sleeve and transmission shaft combine or separate.

[0009] Realization principle, working principle:

[0010] The traditional toothed or friction clutch needs at least two connecting shafts and clutch structures due to the limitation of the structure, so that the structure is difficult to be truly miniaturized; in the scheme, the card beads are pushed out and fall back in the second mounting hole by the advance and retreat of the clutch pin in the first mounting hole, when the card beads are pushed out, the card beads are pressed by the clutch pin and are in contact with the transmission shaft sleeve and the transmission shaft, so that the power obtained by the transmission shaft sleeve can be transmitted to the transmission shaft, and the combination of the clutch is realized; when the clutch pin retreats from the first mounting hole, the steel beads lose the support force and retreat into the second mounting hole, so that the connection of the transmission shaft sleeve and the transmission shaft is invalid, and the disengagement function of the clutch is realized; wherein, the clutch pin and the inner wall of the first mounting hole have a gap, so that the movement of the clutch pin is more convenient.

[0011] As a preferred, the second mounting hole has a plurality of, distributed along the circumference of the transmission shaft; the beneficial effect of the present preferred is that, in the setting of a plurality of second mounting holes, it is convenient to install a plurality of card beads, and the force points of the clutch pin and the transmission shaft and the transmission shaft sleeve are increased, so that the power transmission is more stable.

[0012] As a preferred, the end of the clutch pin in the first mounting hole is provided with a return spring, and the other end of the return spring is located at the bottom of the first mounting hole; the beneficial effect of the present preferred is that, when the clutch pin retreats, the elastic force in the return spring can improve the retreat speed of the clutch pin, so that the clutch is quickly separated.

[0013] As a preferred, the pressure plate is provided with a clutch pin mounting bearing on one side of the transmission shaft, and the clutch pin is matched with the clutch pin mounting bearing; the beneficial effect of the present preferred is that, through the setting of the clutch pin mounting bearing, the clutch pin can rotate synchronously with the transmission shaft when the clutch is combined, so as to reduce the wear.

[0014] As a preferred, the transmission case body is provided with a mounting cylinder, a push rod is arranged on the outer surface of the mounting cylinder, and the other end of the push rod is connected with the other side of the pressure plate; the beneficial effect of the present preferred is that, through the push rod, the pressure plate can be driven away from or close to the transmission shaft, so as to realize the clutch function of the clutch, which is simple and convenient.

[0015] As a preferred, the transmission case body is rotatably connected with a mounting pin, and the mounting cylinder is sleeved on the mounting pin; the push rod has two and is connected to the two sides of the mounting cylinder in the axial direction, and the other end of the push rod is rotatably connected with the pressure plate; the beneficial effect of the present preferred is that, the two push rods can make the movement of the pressure plate more stable.

[0016] As preferred, the gearbox body is provided with a rotating handle, and the connecting end of the rotating handle is fixedly arranged at one end of the mounting pin; the beneficial effect of the present preferred embodiment is that the rotating handle can conveniently drive the rotation of the mounting cylinder, so that the rotation control of the pressure plate and the actuating rod is more simple and convenient.

[0017] As preferred, the transmission shaft sleeve comprises a mounting section and a matching section, the inner side of the mounting section is matched with the transmission shaft, and the outer surface of the mounting section is provided with transmission teeth; the matching section is provided with accommodating grooves, and the accommodating grooves are matched with the clamping beads; the beneficial effect of the present preferred embodiment is that the accommodating grooves on the inner side of the matching section are provided, so that the clamping beads have sufficient contact surfaces and limiting spaces, so that the clamping beads are less likely to slip when being squeezed, and the transmission is more stable and reliable.

[0018] As preferred, the number of the accommodating grooves is the same as that of the clamping beads, the accommodating grooves are arc grooves, the two sides of the groove bottom of the accommodating grooves are respectively smooth sections and limiting sections, the arc length of the smooth section projected onto the mounting section is greater than that of the limiting section projected onto the mounting section, and the smooth section of the accommodating groove is adjacent to the limiting section of the adjacent accommodating groove; the smooth section and the limiting section are distributed along the rotation direction of the transmission shaft sleeve; the beneficial effect of the present preferred embodiment is that the accommodating grooves are respectively provided with the smooth sections and the limiting sections, the smooth sections are more convenient for the clamping beads to enter the accommodating grooves, and the limiting sections can limit the clamping beads, so that the transmission is more convenient.

[0019] As preferred, the transmission shaft is further provided with an annular groove, and the annular groove is arranged at one side of the second mounting hole; the beneficial effect of the present preferred embodiment is that when the clamping bead enters and exits the second mounting hole, the clamping bead may collide with the edge of the second mounting hole to form burrs or protrusions, the burrs or protrusions may be clamped between the transmission shaft and the transmission shaft sleeve, and in severe cases, the transmission shaft and the transmission shaft sleeve may be adhered, which affects the separation of the transmission shaft and the transmission shaft sleeve.

[0020] The beneficial effect of the present utility model is that:

[0021] The clutch structure of the present scheme is different from the existing chuck type and friction type clutch structures; in the present scheme, the clamping beads are driven by the clutch pin to combine and separate the transmission shaft and the transmission shaft sleeve, the clutch is simple and convenient, the number of shafts used is smaller, and there is no need for external clutch chuck structure, and the clutch pin is located in the first mounting hole in the transmission shaft, which is greatly beneficial to the miniaturization and light weight of the agricultural machine as a whole.

[0022] The mounting section and the matching section of the transmission shaft sleeve are provided, which ensures smooth rotation of the transmission shaft sleeve and leaves sufficient combination space for the clamping beads; the smooth section and the limiting section of the accommodating groove are provided, which effectively limits the stability of the clamping beads during combination; the smooth section and the limiting section of the accommodating groove can realize the smoothness of the clamping beads entering and the stability of the clamping beads during combination, which is simple and effective. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is an axonometric view of the complete agricultural machinery according to an embodiment of the present utility model.

[0024] Figure 2 This is a cross-sectional schematic diagram of an agricultural machine according to an embodiment of the present utility model.

[0025] Figure 3 It is a cross-sectional schematic diagram of the transmission shaft according to an embodiment of the present utility model.

[0026] Figure 4 This is an axonometric view of the clutch pin drive structure of an embodiment of the present utility model.

[0027] Figure 5 This is an axonometric view of the transmission sleeve according to an embodiment of the present utility model.

[0028] Figure 6 This is a front view of the transmission sleeve according to an embodiment of the present utility model.

[0029] Figure 7 This is a front view of the transmission shaft according to an embodiment of the present utility model.

[0030] Description of reference numerals:

[0031] Gearbox body 1, drive shaft 2, transmission sleeve 3, first mounting hole 4, second mounting hole 5, pressure plate 6, clutch pin 7, clutch section 8, card bead 9, return spring 10, mounting bearing 11, mounting cylinder 12, toggle rod 13, mounting pin 14, rotating handle 15, mounting section 16, matching section 17, accommodating groove 19, smooth section 20, limiting section 21, annular groove 22. DETAILED DESCRIPTION

[0032] The following detailed description of the preferred embodiments of the present invention is provided in conjunction with the accompanying drawings to make the advantages and features of the present invention more easily understood by those skilled in the art, thereby more clearly defining the scope of protection of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are also within the scope of protection of the present invention.

[0033] As attached Figure 1 -Attached Figure 7 As shown,

[0034] A clutch structure for an agricultural machinery gearbox, such as Figure 1 and Figure 2, including a gearbox body 1, in which a transmission shaft 2 is rotatably connected through a bearing in the gearbox body 1, a transmission sleeve 3 is sleeved on the right end of the transmission shaft, and a first mounting hole 4 is opened at the center position of the transmission sleeve 3 on the side where the transmission sleeve 3 is located, and a second mounting hole 5 is opened radially on the outer surface of the transmission shaft 2. Specifically, the first mounting hole 4 and the second mounting hole 5 are communicated with each other; a pressure plate 6 is also provided on the gearbox body 1, and a clutch pin 7 matching the first mounting hole 4 is installed on the left side of the pressure plate 6, wherein the clutch pin 7 and the first mounting hole 4 are clearance-fitted; the diameter of the left side of the clutch pin 7 gradually decreases to form a clutch section 8, and the diameter of the left side of the clutch section 8 first decreases and then increases, which is convenient for the placement and limiting of the card bead 9, wherein the card bead 9 is specifically a steel ball; specifically, the card bead 9 is arranged in the second mounting hole 5, and when the clutch pin 7 moves to the left and right in the first mounting hole 4, the clutch section 8 pushes the card bead 9 to move up and down, thereby combining or separating the transmission sleeve 3 with the transmission shaft 2.

[0035] Compared with the existing technology, the traditional tooth-type or friction-type clutch is limited by its structure and requires at least two connecting shafts and a clutch structure, as well as sufficient friction structure and limit structure, making it difficult to truly miniaturize its structure.

[0036] The obvious difference of this scheme is that, when the clutch structure of this scheme is in clutch operation, the clutch pin 7 advances and retreats in the first mounting hole 4, pushing the card bead 9 out of the second mounting hole 5 and dropping it back. Since the clutch section 8 of the clutch pin 7 is conical, it will gradually push the card bead 9 out. The card bead 9 is pushed by the clutch pin 7 and eventually squeezed, so that the transmission sleeve 3 is connected to the drive shaft 2, and then the power obtained by the transmission sleeve 3 from other shafts is transmitted to the drive shaft 2, realizing the combined transmission of the clutch; and when the clutch pin 7 retreats to the right from the first mounting hole 4, the card bead 9 loses the extrusion support force and retreats into the second mounting hole 5, making the connection between the transmission sleeve 3 and the drive shaft 2 invalid, realizing the disengagement function of the clutch; wherein, there is a gap between the clutch pin 7 and the inner wall of the first mounting hole 4, which makes the movement of the clutch pin more convenient.

[0037] During implementation, there are multiple second mounting holes 5, specifically 3 in this embodiment, distributed around the transmission shaft 2; the provision of multiple second mounting holes 5 can leave sufficient installation space for multiple card beads 9. During implementation, the force application points of the clutch pin 7, the transmission shaft 2 and the transmission sleeve 3 are increased, making the power transmission more stable.

[0038] During implementation, a return spring 10 is sleeved on the end of the clutch pin 7 in the first mounting hole 4, and the other end of the return spring 10 is located at the bottom of the first mounting hole 4, and only one side of the two sides of the return spring is fixedly connected; when the clutch pin 7 retracts, the return spring 10 has the elastic force to restore its original length, and then through the setting of the return spring 10, the clutch pin 7 can be further pushed to achieve rapid separation of the clutch.

[0039] In implementation, as Figure 2 The clutch pin 7 is installed in the pressure plate 6 through the clutch pin mounting bearing 11 arranged on one side of the transmission shaft 2. Through the arrangement of the clutch pin mounting bearing 11, not only the installation and fixation of the clutch pin 7 are facilitated, but also the synchronous rotation of the clutch pin 7 and the transmission shaft 2 is facilitated when the clutch is combined, and the wear between the clutch pin 7 and the clamping ball 9 is reduced.

[0040] In implementation, how to drive the pressure plate 6, i.e. the clutch pin 7, is as follows Figure 4 The mounting pin 14 is rotationally connected to the transmission case 1, and the mounting cylinder 12 is sleeved on the mounting pin 14. The actuating rod 13 is integrally formed or welded on the outer surface of the mounting cylinder 12. In specific implementation, the actuating rod 13 has two, which are respectively connected to the left and right sides of the mounting cylinder 12, and the other end of the actuating rod 13 is pivotally connected to the end face of the right end of the pressure plate 6. Because there is a gap between the clutch pin 7 and the first mounting hole 4, the actuating rod 13 can drive the clutch pin 7 to advance and retreat in the first mounting hole 4 when the actuating rod 13 rotates, thereby realizing the clutch function of the clutch simply and conveniently. Moreover, the movement of the pressure plate 6 is more stable through the arrangement of the double actuating rods 13. In implementation, as Figure 1 In order to better drive the pressure plate 6, the rotating handle 15 is further arranged on the outside of the transmission case 1. Specifically, the connecting end of the rotating handle 15 is connected to one end of the mounting pin 14 by any of the following or other ways, i.e. threaded connection, clamping or welding. Through the arrangement of the rotating handle 15, the rotation of the mounting cylinder 12 is driven, and the rotation control of the pressure plate 6 and the actuating rod 13 is more simple and convenient. In implementation, as Figure 5 and Figure 6, the transmission shaft sleeve 3 comprises an integral forming mounting section 16 and a matching section 17, wherein the inner side of the mounting section 16 is rotationally connected to the transmission shaft 2, and the outer surface of the mounting section 16 is integrally formed with a transmission gear for power input or output; in order to improve the stability of transmission, the inner surface of the matching section 17 is provided with accommodating grooves 19, the accommodating grooves 19 can accommodate the clamping beads 9, in the embodiment, the number of the accommodating grooves 19 is the same as that of the clamping beads 9 and is uniformly three, the accommodating grooves 19 are preferably arc grooves, the accommodating grooves 19 are divided into two sides from the groove bottom, the right side is a smooth section 20 and the left side is a limiting section 21, the corresponding arc length of the smooth section 20 projected onto the mounting section 16 is greater than that of the limiting section 21, the smooth section 20 of the accommodating groove 19 is close to the limiting section 21 of the adjacent accommodating groove 19; the smooth section 20 and the limiting section 21 are distributed along the rotation direction of the transmission shaft sleeve 3; the accommodating grooves 19 on the inner side of the matching section 17 are provided, so that the clamping beads 9 have sufficient contact surface and limiting space, so that the slipping phenomenon of the clamping beads 9 is less when the clamping beads 9 are squeezed, and the transmission is more stable and reliable; wherein the accommodating grooves 19 are respectively the smooth section 20 and the limiting section 21, the smooth section 20 is provided, so that the clamping beads are more convenient to enter the accommodating grooves 19, and the limiting section 21 is provided to limit the clamping beads 9, so that the transmission is more convenient.

[0041] In specific implementation, such as Figure 7 The outer surface of the transmission shaft 2 is further provided with an annular groove 22, the annular groove 22 is arranged at a periphery of the second mounting hole 5; when the clamping beads 9 enter and exit the second mounting hole 5, the clamping beads 9 may collide with the edge of the second mounting hole 5 to form burrs or protrusions, and the burrs or protrusions caused thereby can be clamped between the transmission shaft 2 and the transmission shaft sleeve 3, and in severe cases, the transmission shaft 2 and the transmission shaft sleeve 3 can be adhered, thereby affecting the separation of the transmission shaft 2 and the transmission shaft sleeve 3.

[0042] The embodiment of the utility model has the advantages of

[0043] The clutch structure of the scheme is different from the existing chuck type and friction type clutch structures, in the scheme, the transmission shaft 2 and the transmission shaft sleeve 3 are combined and separated by the clutch pin 7 and the clamping beads 9, the clutch is simple and convenient, the number of shafts used is less, and no external clutch chuck structure is needed, and the clutch pin is located in the first mounting hole in the transmission shaft, which is greatly beneficial to the miniaturization and light weight of the agricultural machine as a whole.

[0044] The mounting section 16 and the matching section 17 of the transmission shaft sleeve 3 leave sufficient combination space for the clamping beads 9 under the condition that the rotation of the transmission shaft sleeve is smooth, and the stability of the clamping beads 9 in combination is effectively limited through the arrangement of the accommodating grooves 19; the smooth section 20 and the limiting section 21 of the accommodating grooves 19 can realize the smoothness of the clamping beads 9 entering and the stability of the clamping beads 9 in combination, which is simple and effective.

[0045] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims.

Claims

1. A kind of agricultural machinery gearbox clutch structure, including gearbox body (1) and the transmission shaft (2) of rotation connection in gearbox body (1), the transmission shaft (2) one end is equipped with transmission shaft sleeve (3), it is characterized by: The transmission shaft (2) is provided with a first mounting hole (4) at the center position of the side where the transmission sleeve (3) is located, and a second mounting hole (5) is arranged in the radial direction of the transmission shaft (2), the first mounting hole (4) and the second mounting hole (5) are communicated; the transmission shaft (2) is further provided with a pressure plate (6), one side of the pressure plate (6) is provided with a clutch pin (7) matched with the first mounting hole (4); the clutch pin (7) is gradually reduced in diameter at the position of the second mounting hole (5) to form a clutch section (8) toward the side of the bottom of the first mounting hole (4); the second mounting hole (5) is provided with a clamping ball (9), when the clutch pin (7) reciprocates in the first mounting hole (4), the clutch section (8) pushes the clamping ball (9) to combine or separate the transmission sleeve (3) and the transmission shaft (2).

2. The clutching structure of the farm machine transmission according to claim 1, characterized by: The second mounting hole (5) has a plurality of second mounting holes (5) distributed in the circumferential direction of the transmission shaft (2).

3. The clutching structure according to claim 1, wherein: The end of the clutch pin (7) in the first mounting hole (4) is provided with a return spring (10), and the other end of the return spring (10) is located at the bottom of the first mounting hole (4).

4. The clutching structure according to claim 1, wherein: The pressure plate (6) is provided with a clutch pin mounting bearing (11) on the side of the transmission shaft (2), and the clutch pin (7) is matched with the clutch pin mounting bearing (11).

5. The clutching structure according to claim 1, wherein: The transmission shaft (2) is further provided with a mounting cylinder (12), and a push rod (13) is arranged on the outer surface of the mounting cylinder (12), and the other end of the push rod (13) is connected with the other side of the pressure plate (6).

6. The farm machine gearbox clutch structure according to claim 5, characterized in that: The transmission shaft (2) is further provided with a mounting pin (14) rotatably connected with the transmission shaft (2), and the mounting cylinder (12) is sleeved on the mounting pin (14); the push rod (13) has two push rods (13) respectively connected to the two sides of the mounting cylinder (12) in the axial direction, and the other ends of the push rods (13) are rotatably connected with the pressure plate (6).

7. The farm machine gearbox clutch structure according to claim 6, characterized in that: The transmission shaft (2) is further provided with a rotating handle (15), and the connecting end of the rotating handle (15) is fixedly arranged on one end of the mounting pin (14).

8. The agricultural machine transmission clutch structure of claim 1, wherein: The transmission sleeve (3) comprises a mounting section (16) and a matching section (17), the inner side of the mounting section (16) is matched with the transmission shaft (2), and the outer surface of the mounting section (16) is provided with a transmission gear; the matching section (17) is provided with a receiving groove (19), and the receiving groove (19) is matched with the clamping ball (9).

9. The farm machine gearbox clutch structure according to claim 8, characterized in that: The number of the receiving groove (19) and the clamping ball (9) is the same, the receiving groove (19) is an arc-shaped groove, the two sides of the groove bottom of the receiving groove (19) are respectively a smooth section (20) and a limiting section (21), the arc length of the smooth section (20) projected on the mounting section (16) is greater than the arc length of the limiting section (21) projected on the mounting section (16), the smooth section (20) of the receiving groove (19) is close to the limiting section (21) of the adjacent receiving groove (19), and the smooth section (20) and the limiting section (21) are distributed along the rotation direction of the transmission sleeve (3).

10. The agricultural machine transmission clutch structure of claim 1, wherein: The transmission shaft (2) is further provided with an annular groove (22), and the annular groove (22) is arranged at one side of the second mounting hole (5).

Images