Safety protection power transmission mechanism for bundling machine

Abstract

The utility model belongs to the technical field of bundling machine accessories, and particularly relates to a safety protection power transmission mechanism for a bundling machine, which comprises a power transmission mechanism and a shifting fork mechanism, in the power transmission mechanism, a shearing disc is connected with a driving wheel I through a shearing bolt structure, and a driving wheel II is detachably connected with the driving wheel I; the power of the power main shaft is transmitted to the transmission wheel I and the transmission wheel II through the shearing disc and the shearing bolt structure, the shearing bolt structure is damaged and broken when equipment is overloaded, and the gearbox is prevented from being damaged; in a connecting frame of the shifting fork mechanism, all parts are connected through keys, the coaxiality of all connecting rods can be guaranteed, and power of the power transmission mechanism is transmitted to the connecting frame through a transmission wheel I and transmitted to a shifting fork assembly installed on the connecting frame through a transmission wheel II.

Description

Technical Field

[0001] The utility model belongs to the technical field of baling machine accessories, and in particular relates to a safety protection power transmission mechanism for a baling machine. Background Art

[0002] Usually, the power receiving shaft of the baler receives the power from the tractor and transmits the power to the gearbox, which then distributes the power to the fork mechanism, picking mechanism and other functional mechanisms. Since the power of the gearbox is mostly directly transmitted to various functional mechanisms through chains and other components in the baler, when material blockage occurs, it is easy to cause the gearbox to overload and thus damage the gearbox.

[0003] In addition, the overall structure of the feeding fork mechanism of the existing baler generally includes a first connecting rod, a first connecting plate, a second connecting rod, a second connecting plate and a third connecting rod; the first connecting rod and the third connecting rod are hingedly supported on the equipment frame as the overall structure, and the second connecting rod is arranged between the first connecting plate and the second connecting plate. The first connecting rod and the third connecting rod of the current fork mechanism are directly inserted into the corresponding fixing holes of the first connecting plate and the second connecting plate and are directly fixed, and the coaxiality of the two cannot be guaranteed. Similarly, since the two ends of the second connecting rod are directly inserted into the first connecting plate and the second connecting plate respectively, the coaxiality cannot be guaranteed, and the first connecting plate and the second connecting plate currently used are fixedly connected to the second connecting rod and cannot be disassembled. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a safety protection power transmission mechanism for a baler, which can disconnect the connection between the functional mechanism and the gearbox when the baler is blocked to avoid damage to the gearbox, and at the same time adopts a new type of fork mechanism to solve the problems existing in the existing feeding fork mechanism.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is as follows: a safety protection power transmission mechanism for a baler, including a power transmission mechanism and a fork mechanism, the power transmission mechanism including a power main shaft, a shearing disc, a transmission wheel I and a transmission wheel II, the two ends of the power main shaft are respectively provided with a power receiving part and a power transmission part, the power transmission part is provided with a shearing disc hub, the shearing disc is sleeved on the power main shaft and connected to the shearing disc hub, the transmission wheel I is sleeved on the power main shaft and there is a gap between the power main shaft, the transmission wheel I is connected to the end face of the shearing disc through a shear bolt structure, the transmission wheel II is sleeved on the power main shaft and there is a gap between the power main shaft, and the transmission wheel II is detachably connected to the transmission wheel I;

[0006] The shift fork mechanism comprises a connecting frame and a shift fork assembly, the connecting frame comprises a first connecting rod, a first connecting plate, a second connecting rod, a second connecting plate and a third connecting rod, the first connecting plate and the second connecting plate are arranged in the same direction, one end of the second connecting rod is key-connected with the first connecting plate, and the other end of the second connecting rod is key-connected with the second connecting plate; and the second connecting plate is detachably connected to the second connecting rod; the first connecting rod is key-connected with the end of the first connecting plate away from the second connecting rod, the third connecting rod and the second connecting plate are key-connected with the end of the second connecting rod away from the second connecting rod, the axes of the first connecting rod and the third connecting rod coincide, the first connecting rod is provided with a shift fork transmission wheel I, and the shift fork transmission wheel I is in transmission cooperation with the transmission wheel I,

[0007] The shift fork assembly includes a shift fork shaft, a shift fork, a connecting rod mounting plate, a connecting rod and a swing arm. The shift fork shaft is sleeved on the second connecting rod and connected to the second connecting rod through a bearing. A connecting rod mounting plate and a plurality of detachable shift forks are installed on the outer circumferential wall of the shift fork shaft. The connecting rod mounting plate and the shift fork are in opposite directions. One end of the connecting rod is connected to the connecting rod mounting plate and the connecting rod rotates relative to the connecting rod mounting plate. A swing arm bearing is provided at the other end of the connecting rod. One end of the swing arm is connected to the connecting rod through the swing arm bearing. A shift fork transmission wheel II is provided at the other end of the swing arm. The shift fork transmission wheel II cooperates with the transmission wheel II in transmission.

[0008] The power of the gearbox is transmitted to the fork mechanism through the power transmission mechanism. When the equipment is blocked, the shear bolt structure is disconnected to avoid damage to the gearbox. The fork mechanism improves the stability of its components during use and the convenience of disassembly and assembly through a reasonably designed structure and cooperation with the power transmission mechanism.

[0009] As an optional solution, at least one shear hole I is provided on the shear disk, and a corresponding shear hole II is provided on the wheel surface of the transmission wheel I. The shear holes I and the shear holes II correspond one to one and form a group of shear holes, and a shear bolt structure is installed in the group of shear holes; the shear bolt structure includes a shear bolt, a shear sleeve and a nut, the shear sleeve is inserted into the shear hole I and the shear hole II, and the shear bolt passes through the shear sleeve and is threadedly connected with the nut.

[0010] As an optional solution, at least two shear holes I are provided on the shear disc, and the shear bolt structure is installed in only one set of shear holes. The shear bolt structure is installed in only one set of shear holes. After the shear bolt structure is disconnected and the shear holes are destroyed, the shear bolt structure can be installed in another set of shear holes for use.

[0011] As an optional solution, the transmission wheel I is welded to the transmission sleeve, the transmission sleeve is sleeved on the power main shaft, and the side wall of the transmission sleeve is connected to the transmission wheel II by fixing bolts.

[0012] As an optional solution, the end of the transmission wheel II away from the transmission sleeve is welded to the side wall of the positioning sleeve, and the positioning sleeve is sleeved on the power main shaft with a gap between the positioning sleeve and the power main shaft.

[0013] As an optional solution, a second connecting hole I is provided at one end of the second connecting plate, a second key groove I is provided on the side wall of the second connecting hole I, a second key groove II is provided at the end of the third connecting rod, the second key groove I and the second key groove II correspond to form a second flat key groove I, and a second flat key I is connected in the second flat key groove I;

[0014] A second connecting hole II is provided at the other end of the second connecting plate, a through opening is provided at the lower part of the second connecting hole II, a locking piece is detachably provided at the through opening, a second key groove III is provided at the upper side wall of the second connecting hole II, a second key groove IV is provided at the corresponding end of the second connecting rod, the second key groove III and the second key groove IV constitute a second flat key groove II, and a second flat key II is connected in the second flat key groove II.

[0015] As an optional solution, the first connecting plate is fixedly connected to the second connecting rod, a first connecting hole I is provided at one end of the first connecting plate, a first key groove I is provided on the side wall of the first connecting hole I, a first key groove II is provided at the end of the first connecting rod, the first key groove I and the first key groove II correspond to form a first flat key groove I, a first flat key I is connected in the first flat key groove I, and the first flat key groove I and the second flat key groove I are in the same plane;

[0016] A first connecting hole II is provided at the other end of the first connecting plate, a first key groove III is provided on the upper side wall of the first connecting hole II, a first key groove IV is provided at the corresponding end of the second connecting rod, the first key groove III and the first key groove IV constitute a first flat key groove II, a first flat key II is connected in the first flat key groove II, the first flat key groove II and the second flat key groove II are in the same plane, and the first connecting plate is provided with a welding seal layer I at the assembly end located between the second connecting rod and the first connecting hole II.

[0017] As an optional solution, an elastic pin hole is provided on the first connecting plate, the elastic pin hole is vertically connected to the first connecting hole II, one end of the elastic pin is passed through the elastic pin hole and pressed against the second connecting rod, a welding seal layer II is provided in the elastic pin hole, and the welding seal layer II fixes the elastic pin in the elastic pin hole. The elastic pin is arranged on the first connecting plate and welded to improve the connection stability between the first connecting plate and the second connecting rod.

[0018] As an optional solution, the first connecting plate is detachably connected to the second connecting rod.

[0019] As an optional solution, a shift fork mounting seat is fixedly provided on the outer circumferential wall of the shift fork shaft, and one end of the shift fork is connected to the shift fork mounting seat by means of bolts.

[0020] Compared with the prior art, the utility model has the following beneficial effects: 1. By utilizing the power transmission mechanism, the power received by the power main shaft is transmitted to the transmission wheel I and the transmission wheel II through the shear disk and the shear bolt. When an overload such as a blockage occurs, the shear bolt is disconnected, and the power transmission between the power main shaft and the transmission wheels I and II is disconnected, thereby avoiding damage to the gearbox and improving the power performance and service life of the machine. The shear force of the utility model can be replaced and adjusted according to the shear sleeve and the shear bolt; 2. Keyways are provided at each connection of the connecting frame and a flat key is used for fixed connection, which can ensure the coaxiality of each connecting rod, and the connection between the second connecting rod and the second connecting plate is detachable, which can be disassembled and installed to the required position. The structure of the utility model can better remove grass and reduce the failure rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 A schematic diagram of the structure of the power transmission mechanism for safety protection;

[0023] Figure 2 It is a structural diagram of the power transmission mechanism;

[0024] Figure 3 is a cross-sectional schematic diagram of a power transmission mechanism;

[0025] Figure 4 It is the structural diagram of the fork mechanism;

[0026] Figure 5 It is a schematic diagram of the end of the shift fork mechanism where the third connecting rod is located;

[0027] In the figure: 11, power main shaft, 12, shear disk, 13, transmission wheel I, 14, transmission wheel II, 15, shear disk hub, 21, first connecting rod, 22, first connecting plate, 23, second connecting rod, 24, second connecting plate, 25, third connecting rod, 26, shift fork transmission wheel I, 31, shift fork shaft, 32, shift fork, 33, connecting rod mounting plate, 34, connecting rod, 35, swing arm, 36, shift fork transmission wheel II. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Example

[0029] See also Figure 1-Figure 5 , a safety protection power transmission mechanism for a baler, including a power transmission mechanism and a fork mechanism. The power transmission mechanism includes a power main shaft 11, a shear disc 12, a transmission wheel I 13 and a transmission wheel II 14. The two ends of the power main shaft 11 are respectively provided with a power receiving part and a power transmission part. The power transmission part is provided with a shear disc hub 15. The shear disc 12 is sleeved on the power main shaft 11 and connected to the shear disc hub 15. The transmission wheel I 13 is sleeved on the power main shaft 11 and there is a gap between the power main shaft 11. The transmission wheel I 13 is connected to the end face of the shear disc 12 through a shear bolt structure. The transmission wheel II 14 is sleeved on the power main shaft 11 and there is a gap between the power main shaft 11. The transmission wheel II 14 is detachably connected to the transmission wheel I 13.

[0030] For details, please refer to Figure 1-Figure 3 The two ends of the power main shaft 11 are provided with a power receiving part and a power transmission part. The power receiving part is used to cooperate with the gearbox and receive power. The power transmission part is provided with a shear disk hub 15. The inner wall of the shear disk hub 15 is provided with an inner spline, and the outer wall of the power main shaft 11 is provided with an outer spline. The shear disk hub 15 is sleeved on the power main shaft 11. The shear disk hub 15 and the power main shaft 11 rotate synchronously through the cooperation of the inner spline and the outer spline. The shear disk 12 is sleeved on the power main shaft 11 and connected to the shear disk hub 15. The power main shaft 11 drives the shear disk 12 to rotate by driving the shear disk hub 15.

[0031] A washer and a retaining ring are also provided on the power main shaft 11 at the outer end of the shear disc hub 15 , wherein the retaining ring is also provided with an internal spline that cooperates with the power main shaft 11 .

[0032] The transmission wheel Ⅰ13 is sleeved on the power main shaft 11 and connected to the end face of the shear disk 12 through a shear bolt structure. There is a gap between the transmission wheel Ⅰ13 and the power main shaft 11. The power main shaft 11 does not directly drive the transmission wheel Ⅰ13 to rotate, but drives the transmission wheel Ⅰ13 to rotate by driving the shear disk 12 to rotate. When overload occurs, the shear bolt structure connecting the transmission wheel Ⅰ13 and the shear disk 12 is disconnected, and the power main shaft 11, the shear disk hub 15 and the shear disk 12 can still receive the power of the gearbox and rotate, but will not drive the transmission wheel Ⅰ13 to rotate, thereby avoiding damage to the gearbox when the equipment is blocked. The transmission wheel Ⅱ14 is sleeved on the power main shaft 11 and is detachably connected to the transmission wheel Ⅰ13. Similarly, there is a gap between the transmission wheel Ⅱ14 and the power main shaft 11. The transmission wheel Ⅱ14 is not directly driven by the power main shaft 11. The transmission wheel Ⅱ14 rotates with the rotating wheel Ⅰ. When the equipment is blocked and the transmission wheel Ⅰ13 stops rotating, the transmission wheel Ⅱ14 also stops rotating. The transmission wheel II 14 is detachably connected to the transmission wheel I 13, and the transmission wheel II 14 can be disassembled and replaced according to usage requirements.

[0033] See also Figure 1-Figure 3 The shear disc 12 is provided with at least one shear hole I, and the wheel surface of the transmission wheel I13 is provided with a corresponding shear hole II. The shear holes I and II correspond to each other one by one and form a group of shear holes. A shear bolt structure is installed in the group of shear holes; the shear bolt structure includes a shear bolt, a shear sleeve and a nut. The shear sleeve is inserted into the shear hole I and the shear hole II, and the shear bolt is threadedly connected with the nut after passing through the shear sleeve.

[0034] Specifically, a shear hole I is provided on the shear disc 12, and a shear hole II is provided on the transmission wheel I 13 connected and matched with the shear disc 12. The shear hole I and the shear hole II correspond to each other and form a group of shear holes, and the group of shear holes is used to cooperate with the shear bolt structure to connect the shear disc 12 and the transmission wheel I 13. The shear bolt structure includes a shear bolt, a shear sleeve and a nut. When the shear disc 12 and the transmission wheel I 13 are connected by the shear bolt structure, the shear sleeve is inserted into the shear hole I and the shear hole II, and the shear bolt passes through the shear sleeve and is threadedly connected with the nut. By replacing the shear sleeve, different types of shear bolts can be used, and they can be replaced autonomously according to the demand for shear force.

[0035] There is at least one shear hole I on the shear disc 12, preferably two or more than two. In this embodiment and the drawings, three shear holes I are set on the shear disc 12 as an example. Correspondingly, a plurality of shear holes II are also set on the transmission wheel I 13. The shear bolt structure is installed in only one group of shear holes. The advantage of this design is that when a shear fracture occurs, the current group of shear holes is damaged, and the shear bolt structure can be installed again using the multiple shear holes, thereby improving the use efficiency of the shear disc 12 and reducing the maintenance cost.

[0036] See also Figure 1-Figure 3 The transmission wheel Ⅰ13 is welded on the transmission sleeve, the transmission sleeve is sleeved on the power main shaft 11, and the side wall of the transmission sleeve is connected to the transmission wheel Ⅱ14 by fixing bolts.

[0037] The transmission sleeve is sleeved on the power main shaft 11 and there is a gap between the transmission sleeve and the power main shaft 11. The transmission sleeve is not directly driven by the power main shaft 11. The transmission wheel I13 is welded to the transmission sleeve. The side wall of the transmission sleeve is connected to the transmission wheel II14 by fixing bolts. Under the action of the transmission sleeve, when the transmission wheel I13 rotates, it can drive the transmission wheel II14 to rotate. In a further embodiment, the end of the transmission wheel II14 away from the transmission sleeve is welded to the side wall of the positioning sleeve, and the positioning sleeve is sleeved on the power main shaft 11 and there is a gap between the positioning sleeve and the power main shaft 11.

[0038] See also Figure 1 , Figure 4 and Figure 5 The fork mechanism includes a connecting frame and a fork assembly, the connecting frame includes a first connecting rod 21, a first connecting plate 22, a second connecting rod 23, a second connecting plate 24 and a third connecting rod 25, one end of the second connecting rod 23 is keyed to the first connecting plate 22, and the other end is keyed to the second connecting plate 24, the first connecting plate 22 and the second connecting plate 24 are arranged in the same direction, the first connecting rod 21 is keyed to the end of the first connecting plate 22 away from the second connecting rod 23, the third connecting rod 25 is keyed to the end of the second connecting plate 24 away from the second connecting rod 23, and the axes of the first connecting rod 21 and the third connecting rod 25 coincide.

[0039] The first connecting rod 21 and the third connecting rod 25 are connected by a key to ensure that the two are coaxial, and there will be no deviation after being installed on the equipment rack, so that the axes of the first connecting rod 21 and the third connecting rod 25 coincide with each other; the first connecting plate 22 and the second connecting plate 24 are connected to the second connecting rod 23 by a key, so that the two ends of the second connecting rod 23 can be at the same height and the overall axis is kept from tilting; the second connecting plate 24 is detachably connected to the second connecting rod 23 and can be easily disassembled and installed.

[0040] As a specific example of the connecting frame, one end of the second connecting plate 24 is provided with a second connecting hole I suitable for the third connecting rod 25 to cooperate with and connect, the side wall of the second connecting hole I is provided with a second key groove I, the end of the third connecting rod 25 is provided with a second key groove II, the second key groove I and the second key groove II correspond to each other and the two form a second flat key groove I, the second flat key I is provided in the second flat key groove I, after the end of the third connecting rod 25 penetrates the second connecting hole I and forms the second flat key groove I in the second connecting hole I, the third connecting rod 25 is key-connected to the second connecting plate 24 through the second flat key I;

[0041] The other end of the second connecting plate 24 is provided with a second connecting hole II suitable for cooperating with the second connecting rod 23, the lower part of the second connecting hole II is provided with a through opening, the upper side wall of the second connecting hole II is provided with a second key groove III, and the corresponding end of the second connecting rod 23 is provided with a second key groove IV, the second key groove III and the second key groove IV correspond to each other and the two constitute a second flat key groove II, and the second flat key II is connected in the second flat key groove II. After the end of the second connecting rod 23 penetrates into the second connecting hole II and forms the second flat key groove II in the second connecting hole II, the second connecting rod 23 is key-connected to the second connecting plate 24 through the second flat key II.

[0042] Please note that Figure 5 The lower part of the second connection hole II refers to the end away from the second connection hole I along the length direction of the second connection plate 24, and the upper part of the second connection hole II refers to the end close to the second connection hole I along the length direction of the second connection plate 24.

[0043] The through opening is detachably provided with a locking member, such as Figure 5 As shown, the locking member can be used to close the through opening. After the second connecting rod 23 passes through the second connecting hole II, the through opening is closed by the locking member, so that the second connecting rod 23 and the second connecting plate 24 can be tightly connected. The locking member uses a bolt. The second flat key II fixes one end of the second connecting rod 23 to the second connecting plate 24 and then locks it with the locking member. When disassembly is required, the locking member can be loosened and the second flat key II can be removed to achieve separation.

[0044] In this embodiment, the locking member and the through opening cooperate to simultaneously realize a detachable connection between the first connecting plate 22 and the second connecting rod 23, so as to facilitate the disassembly and replacement of some components of the connecting frame.

[0045] One end of the first connecting plate 22 is provided with a first connecting hole I suitable for matching and connecting with the first connecting rod 21, and the side wall of the first connecting hole I is provided with a first key groove I. The corresponding end of the first connecting rod 21 suitable for connecting with the first connecting plate 22 is provided with a first key groove II. The first key groove I and the first key groove II correspond to form a first flat key groove I, and the first flat key I is connected in the first flat key groove I. After the end of the first connecting rod 21 extends into the first connecting hole I and forms the first flat key groove I, the first flat key I key-connects the first connecting rod 21 with the first connecting plate 22, and the first flat key groove I and the second flat key groove I are in the same plane.

[0046] The first connecting plate 22 is fixedly connected with the second connecting rod 23. Specifically, the end of the first connecting plate 22 away from the first connecting hole I is provided with a first connecting hole II suitable for the second connecting rod 23 to cooperate with the connection, the upper side wall of the first connecting hole II is provided with a first key groove III, and the corresponding end of the second connecting rod 23 suitable for connecting with the first connecting plate 22 is provided with a first key groove IV. After the end of the second connecting rod 23 extends into the first connecting hole II, the first key groove III and the first key groove IV form a first flat key groove II, and the first flat key II is connected in the first flat key groove II. The first flat key II cooperates with the first flat key groove II and connects the second connecting rod 23 and the first connecting plate 22 by key. The first flat key groove II and the second flat key groove II are in the same plane. The welding seal layer I is formed by welding at the assembly part of the first connecting plate 22 located at the second connecting rod 23 and the first connecting hole II, and the first connecting plate 22 is fixedly connected with the second connecting rod 23 by the welding seal layer I on the basis of the key connection between the second connecting rod 23 and the first connecting plate 22.

[0047] In a further embodiment, an elastic pin hole is provided on the first connecting plate 22, the elastic pin hole is perpendicular to the first connecting hole II and communicates with the first connecting hole II, an elastic pin is provided in the elastic pin hole, one end of the elastic pin is passed through the elastic pin hole and pressed against the second connecting rod 23, a welding seal layer II is provided in the elastic pin hole, and the welding seal layer II fixes the elastic pin in the elastic pin hole. This design is to enable a more stable fixation, the elastic pin is pressed against the second connecting rod 23, and after pressing, the elastic pin is fixed in the elastic pin hole by welding, and cooperates with the first flat key II to achieve double protection.

[0048] A shift fork transmission wheel Ⅰ26 is provided on the first connecting rod 21 of the connecting frame, and the shift fork transmission wheel Ⅰ26 cooperates with the transmission wheel Ⅰ13. Through the cooperation of the shift fork transmission wheel Ⅰ26 and the transmission wheel Ⅰ13, the power transmission mechanism transmits power to the connecting frame of the shift fork mechanism through the transmission wheel Ⅰ13.

[0049] See also Figure 1 , Figure 4 and Figure 5 The shift fork assembly includes a shift fork shaft 31, a shift fork 32, a connecting rod mounting plate 33, a connecting rod 34 and a swing arm 35. The shift fork shaft 31 is sleeved on the second connecting rod 23 and connected to the second connecting rod 23 through a bearing. A connecting rod mounting plate 33 and a plurality of detachable shift forks 32 are installed on the outer circumferential wall of the shift fork shaft 31. The connecting rod mounting plate 33 and the shift fork 32 are in opposite directions. One end of the connecting rod 34 is connected to the connecting rod mounting plate 33 and the connecting rod 34 rotates relative to the connecting rod mounting plate 33. The other end of the connecting rod 34 is provided with a swing arm 35 bearing. One end of the swing arm 35 is connected to the connecting rod 34 through the swing arm 35 bearing. The other end of the swing arm 35 is provided with a shift fork transmission wheel II 36, and the shift fork transmission wheel II 36 is matched with the transmission wheel II 14 for transmission.

[0050] Specifically, the fork shaft 31 is sleeved on the second connecting rod 23, the inner wall of the fork shaft 31 is connected to the second connecting rod 23 through a bearing, the fork shaft 31 rotates independently relative to the second connecting rod 23, and a connecting rod mounting plate 33 and a fork 32 are installed on the outer circumferential wall of the fork shaft 31. The connecting rod mounting plate 33 and the fork 32 are respectively facing the two sides of the fork shaft 31, and there are one or more forks 32. One end of the connecting rod 34 is connected to the connecting rod mounting plate 33, and the connecting rod 34 can be flipped relative to the connection with the connecting rod mounting plate 33. The other end of the connecting rod 34 is provided with a swing arm 35 bearing, and the swing arm 35 is connected to the swing arm 35 bearing and can rotate relative to the swing arm 35 bearing. The other end of the swing arm 35 is provided with a shift fork transmission wheel II36, and the axis of the shift fork transmission wheel II36 does not coincide with the rotation center of the swing arm 35 bearing. The shift fork transmission wheel II36 is matched with the transmission wheel II14 for transmission. The power transmission mechanism transmits power to the shift fork assembly through the transmission wheel II14 and drives the shift fork assembly to rotate.

[0051] As a further embodiment, in order to improve the stability of power transmission between the power transmission mechanism and the fork assembly, an intermediate transmission mechanism is arranged on the swing arm 35, and the intermediate transmission mechanism includes a driving shaft and a driven shaft. The driving shaft is rotatably mounted on the equipment frame, a fork transmission wheel Ⅱ36 is arranged at one end of the driving shaft, and a power output wheel is arranged at the other end. The fork transmission wheel Ⅱ36 and the power output wheel both rotate synchronously with the power shaft, and the transmission wheel Ⅱ14 cooperates with the fork transmission wheel Ⅱ36 to drive the driving shaft and the power output wheel to rotate; the driven shaft is installed on the swing arm 35 and does not coincide with the rotation center of the swing arm 35 bearing, and a power receiving wheel is arranged on the driven shaft, which rotates synchronously with the driven shaft, and the power receiving wheel cooperates with the power output wheel. The power of the power transmission mechanism is transmitted to the transmission wheel Ⅱ14, the fork transmission wheel Ⅱ36, the power output wheel and the power receiving wheel in turn, driving the swing arm 35 and the connecting rod 34 to drive the fork assembly.

[0052] As a specific example, in this embodiment, the transmission wheel I13, the transmission wheel II14, the fork transmission wheel I26 and the fork transmission wheel II36 are all sprockets, and the transmission wheel I13 and the fork transmission wheel I26, and the transmission wheel II14 and the fork transmission wheel II36 are connected by a transmission chain, and the power output wheel and the power receiving wheel are both gears.

[0053] In some embodiments, in order to facilitate replacement of the shift fork 32 , a plurality of shift fork mounting seats are fixedly provided on the outer circumferential wall of the shift fork shaft 31 , and one end of the shift fork 32 is connected to the shift fork mounting seat by bolts.

[0054] In the description of this specification, the description of reference terms such as "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0055] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A safety protection power transmission mechanism for a baler, characterized in that: The invention comprises a power transmission mechanism and a shift fork mechanism, wherein the power transmission mechanism comprises a power main shaft (11), a shearing disc (12), a transmission wheel I (13) and a transmission wheel II (14), wherein two ends of the power main shaft (11) are respectively provided with a power receiving part and a power transmission part, wherein the power transmission part is provided with a shearing disc hub (15), wherein the shearing disc (12) is sleeved on the power main shaft (11) and connected to the shearing disc hub (15), wherein the transmission wheel I (13) is sleeved on the power main shaft (11) and has a gap with the power main shaft (11), wherein the end surfaces of the transmission wheel I (13) and the shearing disc (12) are connected via a shearing bolt structure, wherein the transmission wheel II (14) is sleeved on the power main shaft (11) and has a gap with the power main shaft (11), and wherein the transmission wheel II (14) and the transmission wheel I (13) are detachably connected; The shift fork mechanism comprises a connecting frame and a shift fork assembly, wherein the connecting frame comprises a first connecting rod (21), a first connecting plate (22), a second connecting rod (23), a second connecting plate (24) and a third connecting rod (25), wherein the first connecting plate (22) and the second connecting plate (24) are arranged in the same direction, one end of the second connecting rod (23) is key-connected to the first connecting plate (22), and the other end of the second connecting rod (23) is key-connected to the second connecting plate (24); and the second connecting plate (24) and the second connecting rod (23) are detachably connected; the first connecting rod (21) is key-connected to an end of the first connecting plate (22) away from the second connecting rod (23), and the third connecting rod (25) is key-connected to an end of the second connecting plate (24) away from the second connecting rod (23), the axes of the first connecting rod (21) and the third connecting rod (25) coincide, and a shift fork transmission wheel I (26) is arranged on the first connecting rod (21), and the shift fork transmission wheel I (26) is in transmission cooperation with the transmission wheel I (13), The shift fork assembly comprises a shift fork shaft (31), a shift fork (32), a connecting rod mounting plate (33), a connecting rod (34) and a swing arm (35). The shift fork shaft (31) is sleeved on the second connecting rod (23) and connected to the second connecting rod (23) via a bearing. A connecting rod mounting plate (33) and a plurality of detachable shift forks (32) are mounted on the outer circumferential wall of the shift fork shaft (31). The connecting rod mounting plate (33) and the shift fork (32) face in opposite directions. One end of the connecting rod (34) is connected to the connecting rod mounting plate (33) and the connecting rod (34) rotates relative to the connecting rod mounting plate (33). A swing arm (35) bearing is arranged at the other end of the connecting rod (34). One end of the swing arm (35) is connected to the connecting rod (34) via the swing arm (35) bearing. A shift fork transmission wheel II (36) is arranged at the other end of the swing arm (35). The shift fork transmission wheel II (36) is in transmission cooperation with the transmission wheel II (14).

2. A safety protection power transmission mechanism for a baler according to claim 1, characterized in that: At least one shearing hole I is provided on the shearing disk (12), and a corresponding shearing hole II is provided on the wheel surface of the driving wheel I (13). The shearing holes I and II correspond to each other one by one and form a group of shearing holes. A shearing bolt structure is installed in the group of shearing holes. The shearing bolt structure comprises a shearing bolt, a shearing sleeve and a nut. The shearing sleeve is inserted into the shearing holes I and II, and the shearing bolt is threadedly connected with the nut after passing through the shearing sleeve.

3. A safety protection power transmission mechanism for a baler according to claim 2, characterized in that: At least two shear holes I are provided on the shear plate (12), and the shear bolt structure is installed in only one group of shear holes.

4. A safety protection power transmission mechanism for a baler according to claim 2, characterized in that: The transmission wheel I (13) is welded on the transmission sleeve, the transmission sleeve is sleeved on the power main shaft (11), and the side wall of the transmission sleeve is connected to the transmission wheel II (14) by fixing bolts.

5. A safety protection power transmission mechanism for a baler according to claim 4, characterized in that: The end of the transmission wheel II (14) away from the transmission sleeve is welded to the side wall of the positioning sleeve. The positioning sleeve is sleeved on the power main shaft (11) and there is a gap between the positioning sleeve and the power main shaft (11).

6. A safety protection power transmission mechanism for a baler according to any one of claims 1 to 5, characterized in that: A second connecting hole I is provided at one end of the second connecting plate (24), a second key groove I is provided on the side wall of the second connecting hole I, a second key groove II is provided at the end of the third connecting rod (25), the second key groove I and the second key groove II correspond to form a second flat key groove I, and a second flat key I is connected in the second flat key groove I; The other end of the second connecting plate (24) is provided with a second connecting hole II, a through opening is provided at the lower part of the second connecting hole II, a locking member is detachably provided at the through opening, a second key groove III is provided at the upper side wall of the second connecting hole II, a second key groove IV is provided at the corresponding end of the second connecting rod (23), the second key groove III and the second key groove IV constitute a second flat key groove II, and a second flat key II is connected in the second flat key groove II.

7. A safety protection power transmission mechanism for a baler according to claim 6, characterized in that: The first connecting plate (22) is fixedly connected to the second connecting rod (23); a first connecting hole I is provided at one end of the first connecting plate (22); a first key groove I is provided on the side wall of the first connecting hole I; a first key groove II is provided at the end of the first connecting rod (21); the first key groove I and the first key groove II correspond to form a first flat key groove I; a first flat key I is connected in the first flat key groove I; the first flat key groove I and the second flat key groove I are in the same plane; The other end of the first connecting plate (22) is provided with a first connecting hole II, the upper side wall of the first connecting hole II is provided with a first key groove III, the corresponding end of the second connecting rod (23) is provided with a first key groove IV, the first key groove III and the first key groove IV constitute a first flat key groove II, the first flat key II is connected inside the first flat key groove II, the first flat key groove II and the second flat key groove II are in the same plane, and the first connecting plate (22) is provided with a welding sealing layer I at the assembly end located between the second connecting rod (23) and the first connecting hole II.

8. A safety protection power transmission mechanism for a baler according to claim 7, characterized in that: An elastic pin hole is provided on the first connecting plate (22), the elastic pin hole is vertically connected to the first connecting hole II, one end of the elastic pin is inserted into the elastic pin hole and pressed against the second connecting rod (23), and a welding sealing layer II is provided in the elastic pin hole, the welding sealing layer II fixes the elastic pin in the elastic pin hole.

9. The safety protection power transmission mechanism for a baler according to claim 7, characterized in that: The first connecting plate (22) is detachably connected to the second connecting rod (23).

10. The safety protection power transmission mechanism for a baler according to claim 7, characterized in that: A shift fork mounting seat is fixedly arranged on the outer circumferential wall of the shift fork shaft (31), and one end of the shift fork (32) is connected to the shift fork mounting seat by means of bolts.

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