Cam mechanism for pick-up balers

Abstract

The present invention relates to a cam mechanism for a picking baler, comprising: a guide member (1), a first cam (2) and a second cam (3), wherein the guide member (1) has a through hole (101), the first cam (2) is fixedly arranged at the center of the through hole (101), the second cam (3) is arranged between the first cam (2) and the inner wall of the guide member (1), and is connected to the outer contour of the first cam (2) and the inner wall of the guide member (1), and the second cam (3) slides and rolls in a clockwise direction along the outer contour of the first cam (2) and the inner wall of the guide member (1) under the drive of a power source. According to the arrangement of the present invention, the structure is reasonably arranged, the movement is smooth, no large horsepower is consumed, and it can be made not easy to wear and damage under long-term operation.

Description

Technical Field

[0001] The present invention relates to the field of agricultural machinery, and in particular to a cam mechanism for a pick-up baler. Background Art

[0002] Round bale balers are currently widely used agricultural machinery for handling crop straw off-field. They can sequentially collect, roll, and tie crop straw into bales, significantly improving straw recovery efficiency and playing a positive role in handling crop straw off-field. However, due to problems with the pickup mechanism of traditional round balers and balers, particularly the unreasonable feeding angle and structure of the pickup's tines, straw often cannot be fed smoothly, blocking the straw feed port and making straw feeding difficult, seriously affecting the efficiency of the picking and baling machine.

[0003] The existing round bale picking and baling machine adopts a cam plate mechanism, but due to the unreasonable structural setting of the cam plate mechanism, it consumes a lot of horsepower, suffers from severe wear and is easy to damage. Summary of the Invention

[0004] The object of the present invention is to solve the above-mentioned problem and provide a cam mechanism for a pick-up baler.

[0005] To achieve the above-mentioned objectives, the present invention provides a cam mechanism for a picking baler, comprising: a guide member, a first cam and a second cam, the guide member having a through hole, the first cam being fixedly arranged at the center position of the through hole, the second cam being arranged between the first cam and the inner wall of the guide member, and being connected to the outer contour of the first cam and the inner wall of the guide member, and the second cam being driven by a power source to slide and roll in a clockwise direction along the outer contour of the first cam and the inner wall of the guide member.

[0006] According to one aspect of the present invention, a first tooth, a second tooth and a third tooth are provided on an outer surface of one end of the second cam;

[0007] A tooth groove is provided between the first tooth and the second tooth.

[0008] According to one aspect of the present invention, a fourth tooth, a fifth tooth, a sixth tooth and a seventh tooth are provided on the outer surface of the other end of the second cam;

[0009] A projection of the fourth tooth toward one end of the second cam is adjacent to the first tooth;

[0010] The sixth tooth and the seventh tooth are arranged adjacent to each other;

[0011] A projection of the seventh tooth toward one end of the second cam partially overlaps with the third tooth.

[0012] According to one aspect of the present invention, the rotation angle of the second cam ranges from 0° to 120°.

[0013] According to one aspect of the present invention, the second cam further has an arc-shaped recess extending axially from one end to the other end of its outer surface, and the arc-shaped recess is located between the fifth tooth and the sixth tooth, and also between the second tooth and the third tooth.

[0014] According to one aspect of the present invention, one end of the inner wall of the guide member is provided with a protrusion that cooperates with the first tooth and can engage with the tooth groove to enable the second cam to move in a clockwise direction while rolling in the opposite direction, a first limiting groove located in front of the protrusion for limiting the first tooth, and a second limiting groove located behind the first tooth and engaging with the second tooth.

[0015] According to one aspect of the present invention, the other end of the inner wall of the guide member is provided with a step for cooperating with the fourth tooth to realize the second cam moving in a clockwise direction and rolling in the reverse direction at the same time, and a sliding wall is provided behind the step for allowing the fifth tooth to slide thereon to realize the buffering sliding after the reverse rolling.

[0016] According to one aspect of the present invention, a first arcuate portion is provided on the outer surface of one end of the first cam, which cooperates with the arcuate recess to realize the sliding of the second cam in the clockwise direction; a second arcuate portion is located behind the first arcuate portion and has a radius smaller than that of the first arcuate portion and is used to cooperate with the protrusion to realize the counterclockwise rolling and subsequent buffering sliding of the second cam; a third arcuate portion is located behind the second arcuate portion, connects the second arcuate portion and the first arcuate portion, and has a radius larger than that of the second arcuate portion and smaller than that of the first arcuate portion and is used to cooperate with the third tooth to realize the second cam moving in the clockwise direction while rolling clockwise.

[0017] According to one aspect of the present invention, the outer surface of the other end of the first cam is provided with an avoidance groove for avoiding the sixth tooth and the seventh tooth when realizing the reverse rolling of the second cam, a second protrusion for cooperating with the seventh tooth to realize the second cam moving in the clockwise direction while rolling clockwise, and a groove located behind the second protrusion and engaging with the sixth tooth to realize the second cam maintaining the clockwise rolling.

[0018] According to one aspect of the present invention, the avoidance groove is projected toward one end of the first cam and is located before the end of the first arc-shaped portion;

[0019] The projection of the second protrusion onto one end of the first cam is located behind the starting end of the third arc-shaped portion;

[0020] A projection of the groove toward one end of the first cam is located before an end of the third arc-shaped portion.

[0021] According to a technical solution of the present invention, due to the structural arrangement of the cam mechanism of the present invention and the motion state caused by the structural arrangement of the cam mechanism, the cam mechanism for the picking baler according to the present invention can timely change the feeding angle of the picker when it is installed in the picking baler, so that the feeding angle is more reasonable, which can effectively solve the technical problems of smooth straw feeding and blockage of the straw feeding port, making straw feeding easier and improving the operating efficiency of the picking baler.

[0022] Moreover, according to the structural setting of the present invention, the cam mechanism of the present invention has a reasonable structural setting, moves smoothly, does not require large horsepower consumption, and is not prone to wear and damage when working for a long time. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A side view schematically showing the motion state of the cam mechanism of the present invention;

[0024] Figure 2 Another side view schematically showing the motion state of the cam mechanism of the present invention;

[0025] Figure 3 A schematic diagram showing the structure of the second cam in the cam mechanism according to the present invention;

[0026] Figure 4 A structural diagram schematically showing a guide member in a cam mechanism according to an embodiment of the present invention;

[0027] Figure 5 The figure schematically shows the structure of a first cam in a cam mechanism according to an embodiment of the present invention. DETAILED DESCRIPTION

[0028] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be derived from these drawings without inventive effort.

[0029] When describing the embodiments of the present invention, the orientation or positional relationship expressed by the terms "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientation or positional relationship shown in the relevant drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the above terms should not be understood as limiting the present invention.

[0030] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. The embodiments cannot be described one by one here, but the embodiments of the present invention are not limited to the following embodiments.

[0031] Figure 1 A side view schematically showing the motion state of the cam mechanism of the present invention; Figure 2 Another side view schematically showing the motion state of the cam mechanism of the present invention.

[0032] like Figure 1 and Figure 2 As shown in FIG. 1 , the cam mechanism for a pick-up baler according to the present invention comprises a guide member 1, a first cam 2, and a second cam 3. In this embodiment, the guide member 1 has a through hole 101, the first cam 2 is fixedly arranged at the center of the through hole 101, and the second cam 3 is arranged between the first cam 2 and the inner wall of the guide member 1. Figure 1 and 2 As shown, the second cam 3, driven by a power source, can move between the first cam 2 and the inner wall of the guide member 1 in four states, as shown in the figure. Specifically, the second cam 3, driven by the power source, moves in a circular motion along a special circular track formed by the outer contour of the first cam 2 and the inner wall contour of the guide member 1. In this embodiment, this circular motion includes sliding and rolling, which will be described in detail below.

[0033] Depend on Figure 1 and Figure 2 It can be seen that in this embodiment, the second cam 3 has four motion states, and these four motion states are formed by the special structure of the cam mechanism of the present invention. Because of these four motion states, the output shaft connected to the second cam 3 also has different motion states, so that the cam mechanism of the present invention does not need to use a D-type track cam structure to achieve angle change, so that when used for a picking baler, the feeding angle and structure of the picking process are reasonable, so that the straw feeding is smooth and the straw feeding port will not be blocked, making straw feeding easier and improving the operating efficiency of the picking baler.

[0034] The specific structure of each component in the cam mechanism according to the present invention is described in detail below with reference to the accompanying drawings.

[0035] Figure 3 The schematic diagram shows the structure of the second cam in the cam mechanism according to the present invention. The second cam 3 has a certain length and has different structures at both ends. Figure 3 In FIG, the dotted line indicates the structure of the distal end of the second cam 3 which cannot be seen at the proximal end. Figure 3 As shown, in this embodiment, a first tooth 301, a second tooth 302, and a third tooth 303 are provided on the outer surface of one end (i.e., the proximal end) of the second cam 3. As shown in the figure, a tooth groove A is provided between the first tooth 301 and the second tooth 302. The first tooth 301 and the second tooth 302 are adjacent to each other, while the third tooth 303 is farther away from the first tooth 301 and the second tooth 302.

[0036] like Figure 3 As shown, in this embodiment, a fourth tooth 304, a fifth tooth 305, a sixth tooth 306, and a seventh tooth 307 are provided on the outer surface of the other end (i.e., the distal end) of the second cam 3. As can be seen from the figure, the projection of the fourth tooth 304 toward the proximal end of the second cam 3 is adjacent to the first tooth 301 and is located before the first tooth 301. The sixth tooth 306 and the seventh tooth 307 are arranged adjacent to each other, and the projection of the seventh tooth 307 toward the proximal end of the second cam 3 partially overlaps with the third tooth 303 and is located before the third tooth 303.

[0037] In this embodiment, the rotation angle of the second cam 3 ranges from 0° to 120°. In the present invention, the angles between the teeth are not limited as long as they can ensure that the second cam 3 rotates between the first cam 2 and the guide member 1 within a range of 0° to 120° to achieve the movement and function of the cam mechanism of the present invention.

[0038] In addition, in this embodiment, if Figure 3 As shown, the second cam 3 also has an arc-shaped recess 308 extending axially from one end to the other end of its outer surface. As can be seen from the figure, the arc-shaped recess 308 is located between the fifth tooth 305 and the sixth tooth 306 at one end of the second cam 3, and is also located between the second tooth 302 and the third tooth 303 at the other end.

[0039] Figure 4 The structure diagram of the guide member in the cam mechanism according to one embodiment of the present invention is schematically shown. The guide member 1 has a certain length and the structures of the two ends of its inner wall are different. Figure 4 As shown, one end (i.e., the proximal end) of the inner wall of the guide member 1 is provided with a tooth 301 that cooperates with the first tooth 301 and can engage with the tooth groove A so as to realize that the second cam 3 moves in the clockwise direction while rolling in the reverse direction (i.e., Figure 1 and Figure 2The protrusion 102 in the motion state 1), the first limiting groove 103 located in front of the protrusion 102 for limiting the first tooth 301, and the second limiting groove 104 located behind the first tooth 301 and engaged with the second tooth 302.

[0040] In this embodiment, the other end of the inner wall of the guide member 1 is provided with a fourth tooth 304 for cooperating with the second cam 3 to move in the clockwise direction and roll in the reverse direction (ie Figure 1 and Figure 2 The step 105 of motion state 1) and the sliding wall 106 provided behind the step 105 for the fifth tooth 305 to slide thereon to achieve a buffered sliding after reverse rolling (i.e., the movement before motion state 2). It can be seen that the formation of the above-mentioned motion state 1 requires the above-mentioned structures at both ends of the guide member 1 to cooperate with the corresponding structures on the second cam 3. Of course, the cooperation of the structure on the first cam 2 is also required, which will be described in detail below.

[0041] Figure 5 The structure diagram of the first cam in the cam mechanism according to one embodiment of the present invention is schematically shown. The first cam 2 has a certain length, and the structures of the two ends of its outer surface are different. Figure 5 In FIG. 1 , the dotted line indicates the structure of the distal end of the first cam 2 which is not visible at the proximal end. Figure 5 As shown, in this embodiment, the outer surface of one end of the first cam 2 is provided with a groove which cooperates with the arc-shaped recess 308 to enable the second cam 3 to slide in the clockwise direction (i.e. Figure 1 and Figure 2 The first arc portion 201 of the motion state 3 and the motion state 4) is located behind the first arc portion 201, and the radius is smaller than that of the first arc portion 201 for cooperating with the protrusion 102 to realize the above-mentioned counterclockwise rolling of the second cam 3 (i.e. Figure 1 and Figure 2 The second arc portion 202 for the movement state 1 in the movement state 1 and the subsequent buffer sliding (i.e., the sliding between the movement state 1 and the movement state 2), the second arc portion 202 located behind the second arc portion 202, connecting the second arc portion 202 and the first arc portion 201, and having a radius larger than the second arc portion 202 and a radius smaller than the first arc portion 201, is used to cooperate with the third tooth 303 to realize the second cam 3 moving in the clockwise direction while rolling clockwise (i.e. Figure 1 and Figure 2 The third arc portion 203 in the motion state 2).

[0042] In this embodiment, the outer surface of the other end of the first cam 2 is provided with an avoidance groove 204 for avoiding the sixth tooth 306 and the seventh tooth 307 when realizing the above-mentioned reverse rolling of the second cam 3 (i.e., motion state 1), that is, the above-mentioned motion state 1 requires the structures of the first cam 2, the second cam 3 and the guide member 1 to be completed together. Of course, in the present invention, the above-mentioned four motion states of the second cam 3 and the transition motion states between the four motion states all require the structural settings of the above-mentioned three components to be completed together. Furthermore, the outer surface of the other end of the first cam 2 is also provided with a groove 204 for cooperating with the seventh tooth 307 to realize the second cam 3 moving in the clockwise direction while rolling clockwise (i.e. Figure 1 and Figure 2 The second protrusion 205 in the motion state 2) and the groove 206 located behind the second protrusion 205 engage with the sixth tooth 306, so that the second cam 3 maintains the above-mentioned clockwise rolling.

[0043] In this embodiment, if Figure 5 As shown, the avoidance groove 204 is projected toward one end of the first cam 2 and is located before the end of the first arc-shaped portion 201. The second protrusion 205 is projected toward one end of the first cam 2 and is located behind the starting end of the third arc-shaped portion 203. The groove 206 is projected toward one end of the first cam 2 and is located before the end of the third arc-shaped portion 203.

[0044] In the above embodiment, the terms "front" and "back" are based on the proximal end in the above structural diagram, that is, when the projections of the proximal structure are compared with the projections of the distal structure, the comparison is made along the clockwise direction.

[0045] According to the above-mentioned structural arrangement of the cam mechanism of the present invention, in actual use, the second cam 3 is connected to the power source to make a clockwise movement between the first cam 2 and the inner wall of the guide member 1. Because the structures of the above-mentioned components (i.e., the structure of the inner wall of the guide member 1, the structure of the outer contour of the first cam 2 and the structure of the outer contour of the second cam 3) are set, the second cam 3 can make the above-mentioned clockwise movement between the first cam 2 and the inner wall of the guide member 1, and can also achieve the following Figure 1 and Figure 2 The four motion states shown in the figure also include the connecting motion states between the various motion states.

[0046] Due to the above-mentioned structural arrangement and the motion state caused by the above-mentioned structural arrangement, the cam mechanism for the picking baler according to the present invention can timely change the feeding angle of the picker when it is installed in the picking baler, making the feeding angle more reasonable, and can effectively solve the technical problems of smooth straw feeding and blockage of the straw feeding port, making straw feeding easier and improving the operating efficiency of the picking baler.

[0047] Moreover, according to the above-mentioned configuration of the present invention, the cam mechanism of the present invention has a reasonable structure, moves smoothly, does not require large horsepower consumption, and is not prone to wear and damage when working for a long time.

[0048] The above description is merely one embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A cam mechanism for a pick-up baler, characterized in that: include: A guide member (1), a first cam (2) and a second cam (3), wherein the guide member (1) has a through hole (101), the first cam (2) is fixedly arranged at the center of the through hole (101), the second cam (3) is arranged between the first cam (2) and the inner wall of the guide member (1), and is connected to the outer contour of the first cam (2) and the inner wall of the guide member (1), and the second cam (3) slides and rolls in a clockwise direction along the outer contour of the first cam (2) and the inner wall of the guide member (1) under the drive of a power source; A first tooth (301), a second tooth (302) and a third tooth (303) are provided on the outer surface of one end of the second cam (3); A tooth groove (A) is provided between the first tooth (301) and the second tooth (302); A fourth tooth (304), a fifth tooth (305), a sixth tooth (306) and a seventh tooth (307) are provided on the outer surface of the other end of the second cam (3); A projection of the fourth tooth (304) toward one end of the second cam (3) is adjacent to the first tooth (301); The sixth tooth (306) and the seventh tooth (307) are arranged adjacent to each other; The projection of the seventh tooth (307) toward one end of the second cam (3) partially overlaps with the third tooth (303); The second cam (3) further has an arc-shaped recess (308) extending axially from one end to the other end of its outer surface, and the arc-shaped recess (308) is located between the fifth tooth (305) and the sixth tooth (306), and is also located between the second tooth (302) and the third tooth (303); One end of the inner wall of the guide member (1) is provided with a protrusion (102) that cooperates with the first tooth (301) and can mesh with the tooth groove (A) to enable the second cam (3) to move in the clockwise direction while rolling in the reverse direction, a first limiting groove (103) located in front of the protrusion (102) for limiting the first tooth (301), and a second limiting groove (104) located behind the first tooth (301) and meshing with the second tooth (302); The other end of the inner wall of the guide member (1) is provided with a step (105) for cooperating with the fourth tooth (304) to enable the second cam (3) to move in the clockwise direction and simultaneously roll in the reverse direction, and a sliding wall (106) provided behind the step (105) for enabling the fifth tooth (305) to slide thereon to achieve buffered sliding after the reverse rolling; The outer surface of one end of the first cam (2) is provided with a first arc portion (201) cooperating with the arc recess (308) to enable the second cam (3) to slide in the clockwise direction; a second arc portion (202) located behind the first arc portion (201) and having a radius smaller than that of the first arc portion (201) for cooperating with the protrusion (102) to enable the second cam (3) to roll in the counterclockwise direction and subsequently buffer the sliding; and a third arc portion (203) located behind the second arc portion (202) and connecting the second arc portion (202) and the first arc portion (201), having a radius larger than that of the second arc portion (202) and smaller than that of the first arc portion (201) for cooperating with the third tooth (303) to enable the second cam (3) to move in the clockwise direction and roll in the clockwise direction simultaneously.

2. The cam mechanism for a pick-up baler according to claim 1, characterized in that: The outer surface of the other end of the first cam (2) is provided with an avoidance groove (204) for avoiding the sixth tooth (306) and the seventh tooth (307) when the second cam (3) is rolling in the reverse direction, a second protrusion (205) for cooperating with the seventh tooth (307) to achieve the second cam (3) moving in the clockwise direction and rolling clockwise at the same time, and a groove (206) located behind the second protrusion (205) and meshing with the sixth tooth (306) to achieve the second cam (3) maintaining the clockwise rolling.

3. The cam mechanism for a pick-up baler according to claim 2, characterized in that: The avoidance groove (204) is projected toward one end of the first cam (2) and is located before the end of the first arc-shaped portion (201); The projection of the second protrusion (205) onto one end of the first cam (2) is located behind the starting end of the third arc-shaped portion (203); The projection of the groove (206) toward one end of the first cam (2) is located before the end of the third arc-shaped portion (203).

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