An implement quick change device

Abstract

The utility model discloses a machine tool quick change device in the engineering machinery technical field, aims at solving the problem of higher cost of rotating machine tool switching, poorer universality, unable to one machine multi -use in prior art. Including horizontal frame, rotating operation machine tool and connecting component, one end of horizontal frame is connected with riser, and the other end is detachably connected with side support, and horizontal frame, riser and side support form concave structure, the lateral wall of side support is rotatably connected with T type cover, and the lateral wall of riser is rotatably connected with transmission shaft, and is equipped with rotating drive mechanism on riser, rotating operation machine tool includes operation shaft, and one end of operation shaft is equipped with convex axle, and the other end is seted up with the docking groove, and is equipped with the clamping structure between docking groove and transmission shaft, the utility model is applicable to rotating machine tool, can realize one machine multi -use, just can satisfy the demand of different working conditions through replacing different rotating operation machine tool, and convenient dismounting, simple operation, good universality can realize modularization replacement, and the cost is lower to purchase and maintain, and the comprehensive use effect is better.

Description

Technical Field

[0001] This invention relates to the field of engineering machinery technology, specifically to a quick-change device for machinery. Background Technology

[0002] Excavators encounter numerous special working conditions during operation, requiring the use of corresponding special attachments. These special attachments are all dedicated to their specific purpose; if switching attachments is necessary, the entire machine must be replaced. Currently, horizontal axis rotary attachments (such as belt cutters, weeders, sweepers, ditchers, and screening buckets) are all dedicated to their specific purpose, and the appropriate attachment should be selected based on the specific working conditions.

[0003] However, the current equipment switching costs are high, and a complete switch is required in actual application. Its versatility is poor, it cannot be platformized, it cannot achieve multiple uses with one machine, and the procurement and maintenance costs are high. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a quick-change device for machinery, which solves the problems of high switching costs, poor versatility, and inability to use one machine for multiple purposes in current rotating machinery.

[0005] To solve the above-mentioned technical problems, the present invention is implemented using the following technical solution:

[0006] This invention provides a quick-change device for machinery, comprising: a cross frame, a rotating working tool, and a connecting assembly disposed on the cross frame. One end of the cross frame is connected to a vertical frame, and the other end is detachably connected to a side support. The cross frame, the vertical frame, and the side support form a concave structure.

[0007] A T-shaped sleeve is rotatably connected to the side wall of the side support near the upright, and a transmission shaft corresponding to the T-shaped sleeve is rotatably connected to the side wall of the upright near the side support. The upright is provided with a rotary drive mechanism for driving the transmission shaft to rotate along its central axis.

[0008] The rotary working tool includes a working shaft. One end of the working shaft is provided with a convex shaft for insertion into a T-shaped sleeve, and the other end is provided with a mating groove for insertion into a transmission shaft. A locking structure for circumferential limiting is provided between the mating groove and the transmission shaft.

[0009] Furthermore, the engaging structure includes a locking block disposed on the end of the drive shaft and a locking groove formed on the bottom wall of the mating groove, wherein the locking block and the locking groove are matched.

[0010] Furthermore, the support frame is provided with a first fixed seat, and a first bearing is installed in the first fixed seat. The transmission shaft is installed in the first fixed seat through the first bearing.

[0011] Furthermore, the side bracket is provided with a second fixed seat, and the T-shaped sleeve is installed in the second fixed seat through a second bearing, and the outer diameter of the T-shaped sleeve and the inner diameter of the second bearing form an interference fit.

[0012] Furthermore, the rotary working tool includes a working cylinder fixedly sleeved on the working shaft, and the rotary working tool includes a guide sleeve, which is movably sleeved on one end of the working shaft with a docking groove; after installation, the guide sleeve can be movably sleeved on the first fixed seat;

[0013] The side support is provided with a positioning sleeve on the side wall near the upright; after installation, the positioning sleeve can be movably fitted onto the side end of the working cylinder.

[0014] Furthermore, the rotary work tool includes a protective cover and side baffles on both sides of the protective cover. After installation, one of the side baffles can be movably fitted onto the positioning sleeve, and the other side baffle is fixedly fitted onto the guide sleeve.

[0015] The side support is provided with a stop block on the side wall near the upright, and the protective cover is provided with a stop hole that can be fitted with the stop block.

[0016] Furthermore, the upright frame includes an upright box with a side opening and a side cover plate detachably connected to the upright box. The upright box includes a U-shaped plate fixed to the cross frame and sealing plates at both ends of the U-shaped plate.

[0017] Furthermore, the rotary drive mechanism includes a drive motor, a drive wheel, a chain, and a driven wheel;

[0018] The drive motor is mounted on the U-shaped plate. The output shaft of the drive motor extends into the vertical box and is connected to the drive wheel. One end of the transmission shaft extends into the vertical box and is connected to the driven wheel. The drive wheel is connected to the driven wheel via a chain.

[0019] Furthermore, the side support includes a U-shaped horizontal plate, a U-shaped vertical plate, and a reinforcing plate. The top of the U-shaped vertical plate is fixed to one side of the bottom of the U-shaped horizontal plate, thereby forming a mutually perpendicular arrangement.

[0020] The reinforcing plates are provided in multiple and arranged at intervals. One end of the reinforcing plate is fixed to the inner wall of the U-shaped vertical plate, and the other end is fixed to the bottom of the U-shaped horizontal plate.

[0021] Furthermore, the crossbeam has a U-shaped structure and its inner side matches the U-shaped cross plate;

[0022] Multiple sets of limiting structures are provided between the cross frame and the U-shaped cross plate. Each set of limiting structures includes: a first insertion hole, a second insertion hole, a stop sleeve, a plug rod, and a pin. The first insertion hole is located on both side walls of the cross frame, the second insertion hole is located on both side walls of the U-shaped cross plate, and the stop sleeve is located on one outer side wall of the cross frame. The first insertion hole, the second insertion hole, and the stop sleeve are arranged coaxially and are all matched with the plug rod.

[0023] The stop sleeve has positioning holes on both sides, and one end of the insertion rod has a locking through hole corresponding to the positioning hole. Both the positioning hole and the locking through hole are matched with the pin.

[0024] Compared with the prior art, the beneficial effects achieved by the present invention are:

[0025] 1. This invention connects the working shaft to the transmission shaft via a mating groove, thereby locking the locking structure. It also connects the working shaft's convex shaft to the T-shaped sleeve, and finally installs the side bracket to the cross frame. This allows the upright frame and side bracket to limit and fix the rotating work tool from both ends. It can meet the needs of multiple uses with one machine. By simply replacing different rotating work tools, it can meet the needs of different working conditions. It is easy to assemble and disassemble, simple to operate, has good versatility, can achieve modular replacement, has low procurement and maintenance costs, and has a better overall effect.

[0026] 2. This invention uses a drive motor to drive the drive wheel to rotate, the drive wheel drives the driven wheel to rotate via a chain, and the driven wheel drives the transmission shaft to rotate. The drive motor is positioned above the cross frame, which has strong anti-interference ability, can adapt to use under harsh working conditions, is not easily damaged, and has good performance.

[0027] 3. This invention places a U-shaped horizontal plate inside the horizontal frame, then inserts the rod through the corresponding first and second insertion holes, and finally inserts the pin through the positioning hole and the locking through hole, so that the rod is limited and locked. At this time, the U-shaped horizontal plate and the horizontal frame remain locked and fixed, so the side bracket is fixedly installed on the side end of the horizontal frame. It is convenient and quick, simple to operate, has high connection stability, and has a simple and compact structure, making it convenient for practical applications. Attached Figure Description

[0028] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0029] Figure 1 This is a schematic diagram of the structure of a quick-change device for machinery provided in an embodiment of the present invention;

[0030] Figure 2 yes Figure 1 The diagram shows the structure of the quick-change device for the machine tool when no rotating working tool is installed.

[0031] Figure 3 This is a front sectional view of the conveyor belt machine;

[0032] Figure 4 This is a structural diagram of a weeding machine;

[0033] Figure 5 This is a structural diagram of the sweeper;

[0034] Figure 6 yes Figure 1 The diagram shows a front sectional view of the quick-change device for the machine.

[0035] Figure 7 yes Figure 6 An enlarged schematic diagram of point A in the quick-change device shown;

[0036] Figure 8 yes Figure 6 An enlarged schematic diagram of point B in the quick-change device shown;

[0037] Figure 9 yes Figure 1 The diagram shows the assembly diagram of the quick-change device for the machine tool.

[0038] Figure 10 yes Figure 1 The diagram shows the structure of the limit structure in the quick-change device of the machine.

[0039] Figure 11 yes Figure 1 The diagram shows the structure of the side support in the quick-change device of the machine.

[0040] In the diagram: 1. Horizontal frame; 1a. First insertion hole; 1b. Stop sleeve; 1b1. Positioning hole; 2. Rotary working tool; 2a. Working shaft; 2a1. Protruding shaft; 2a2. Connecting groove; 2a3. Slot; 2b. Working cylinder; 2c. Guide sleeve; 2d. Protective cover; 2d1. Stopping hole; 2e. Side baffle; 3. Connecting assembly; 4. Vertical frame; 4a. Side cover plate; 4b. U-shaped plate; 4c. Sealing plate; 5. Side support; 5a. U-shaped horizontal plate; 5a1. Second... 5b. Insertion hole; 5c. U-shaped vertical plate; 6. Reinforcing plate; 7. T-shaped sleeve; 8. Drive shaft; 9a. Locking block; 10. Rotary drive mechanism; 11. Drive motor; 12. First pressure plate; 13. Drive wheel; 14. Chain; 15. Driven wheel; 16. Second pressure plate; 17. First bearing; 18. Second fixed seat; 19. Second fixed seat; 10. Second fixed seat; 11. Second bearing; 12. Positioning sleeve; 13. Stop block; 14. Insert rod; 14a. Locking through hole; 15. Pin; 16. First fixed seat. Detailed Implementation

[0041] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention.

[0042] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0043] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances. Example

[0044] like Figures 1 to 11 As shown, this embodiment of the invention provides a quick-change device for machinery, including a cross frame 1, a rotating working tool 2, and a connecting component 3 disposed on the cross frame 1. One end of the cross frame 1 is connected to a vertical frame 4, and the other end is detachably connected to a side support 5. The cross frame 1, the vertical frame 4, and the side support 5 form a concave structure.

[0045] It should be noted that the connecting component 3 is used to connect the boom and the connecting rod, thereby enabling the excavator to drive the quick-change device and the rotating work implement 2 mounted on it to perform operations. In addition, the connecting component 3 can be optionally equipped with a rotating function, thereby driving the quick-change device to rotate 360° in both directions, which greatly improves the flexibility during operation. Since this is prior art, it will not be described in detail here.

[0046] A T-shaped sleeve 6 is rotatably connected to the side wall of the side support 5 near the upright 4. A drive shaft 7, corresponding to the T-shaped sleeve 6, is rotatably connected to the side wall of the upright 4 near the side support 5. The upright 4 is provided with a rotary drive mechanism 8 for driving the drive shaft 7 to rotate along its central axis. The rotary working tool 2 includes a working shaft 2a. One end of the working shaft 2a is provided with a convex shaft 2a1 for inserting into the T-shaped sleeve 6, and the other end is provided with a mating groove 2a2 for inserting into the drive shaft 7. A circumferential limiting engagement structure is provided between the mating groove 2a2 and the drive shaft 7.

[0047] During installation, firstly, the mating groove 2a2 of the working shaft 2a on the rotary work tool 2 is inserted into the drive shaft 7, and the locking structure between the two is completed. Then, the convex shaft 2a1 of the working shaft 2a is inserted into the T-sleeve 6. Finally, the side bracket 5 and the cross frame 1 are installed and fixed to form a concave structure. At this time, the upright frame 4 and the side bracket 5 limit and fix the rotary work tool 2 from the left and right ends, so that one end of the working shaft 2a abuts against the T-sleeve 6, and the other end is tightly inserted into the drive shaft 7. Thus, the working shaft 2a is axially limited, and the rotary work tool 2 is securely installed on the tool quick change device.

[0048] During operation, the rotary drive mechanism 8 drives the transmission shaft 7 to rotate. Since the transmission shaft 7 is circumferentially limited by the engagement structure with the working shaft 2a, the transmission shaft 7 can drive the working shaft 2a to rotate synchronously. The working shaft 2a drives the working cylinder 2b to rotate, and thus the rotary working tool 2 begins to work.

[0049] Preferably, a locking through hole is provided on the circumferential outer wall of the convex shaft 2a1, and a stop hole corresponding to the locking through hole is provided on the circumferential outer wall of the T-sleeve 6. During installation, the stop bolt is passed through the stop hole and the locking through hole and then tightened with the stop nut, thereby completing the detachable fixed connection between the T-sleeve 6 and the convex shaft 2a1. This improves the stability of the rotating work tool 2 during operation and enhances safety.

[0050] With the above settings, the need for multiple uses can be met. By simply changing different rotary work tools 2, the needs of different working conditions can be met. It is easy to disassemble and assemble, simple to operate, has good versatility, can be modularly replaced, has low procurement and maintenance costs, and has a better overall effect.

[0051] like Figure 8 As shown, in this embodiment, the engaging structure includes a locking block 7a disposed on the end of the drive shaft 7 and a locking groove 2a3 opened on the bottom wall of the mating groove 2a2, wherein the locking block 7a and the locking groove 2a3 are matched.

[0052] Preferably, both the locking block 7a and the locking slot 2a3 are in the shape of an "I" and their sizes are matched to achieve a tight engagement and stable power transmission. However, this is not limited to this; they can also be in the shape of a cross, a Y, etc. The specific shape is not limited and can be adjusted according to the actual application.

[0053] With the above settings, the drive shaft 7 can be easily and stably circumferentially limited after being inserted into the docking groove 2a2. It has high structural strength, is easy to dock, and has a better effect.

[0054] like Figure 8 As shown, in this embodiment, the support frame 4 is provided with a first fixed seat 16, and a first bearing 9 is installed in the first fixed seat 16. The transmission shaft 7 is installed in the first fixed seat 16 through the first bearing 9.

[0055] Preferably, the drive shaft 7 is a stepped shaft, with the thinner end fitted inside the first bearing 9 and the thicker end inserted into the mating groove 2a2, thereby forming an axial limiting relationship with the first bearing 9 and improving the stability of the rotating work tool 2 after installation.

[0056] Specifically, the rotary drive mechanism 8 includes a first housing and a first end cover. The first housing is cylindrical and has an internal accommodating chamber for mounting the first bearing 9. The first end cover is detachably connected to the first housing by bolts and is used to axially limit the first bearing 9 mounted in the accommodating chamber.

[0057] With the above settings, the drive shaft 7 can be securely installed on the stand 4 and can rotate smoothly horizontally, which improves the structural strength of the device and ensures the actual use effect.

[0058] like Figure 7 As shown, in this embodiment, the side bracket 5 is provided with a second fixed seat 10, and the T-shaped sleeve 6 is installed in the second fixed seat 10 through the second bearing 11, and the outer diameter of the T-shaped sleeve 6 and the inner diameter of the second bearing 11 form an interference fit.

[0059] Specifically, the rotary drive mechanism 8 includes a second housing and a second end cover. The second housing is cylindrical and has an internal accommodating chamber for mounting the second bearing 11. The second end cover is detachably connected to the second housing by bolts and is used to axially limit the second bearing 11 mounted in the accommodating chamber.

[0060] With the above settings, the T-shaped sleeve 6 can be securely installed on the side bracket 5 and can rotate smoothly horizontally, which improves the structural strength of the device and ensures the actual use effect.

[0061] like Figures 3-5 as well as Figures 7-9As shown, in this embodiment, the rotary work tool 2 includes a working cylinder 2b fixedly sleeved on the working shaft 2a, and a guide sleeve 2c, which is movably sleeved on one end of the working shaft 2a with a docking groove 2a2. After installation, the guide sleeve 2c can be movably sleeved on the first fixed seat 16. The side support 5 is provided with a positioning sleeve 12 on the side wall near the upright 4. After installation, the positioning sleeve 12 can be movably sleeved on the side end of the working cylinder 2b.

[0062] Specifically, the guide sleeve 2c is matched with the rotary drive mechanism 8, so that after being fitted together, it can play a role in radial limiting and support for the rotary work tool 2. Similarly, the positioning sleeve 12, after being fitted together with the working cylinder 2b, can play a role in radial limiting and support for the rotary work tool 2. The two work together to reduce stress concentration, improve the stability of the rotary work tool 2 during operation, and ensure the stability of the overall structure of the device.

[0063] like Figures 1-5 As shown, in this embodiment, the rotary work tool 2 includes a protective cover 2d and side baffles 2e provided on both sides of the protective cover 2d. After installation, one side baffle 2e can be movably fitted onto the positioning sleeve 12, and the other side baffle 2e is fixedly fitted onto the guide sleeve 2c. The side support 5 is provided with a stop block 13 on the side wall near the upright 4, and the protective cover 2d is provided with a stop hole 2d1 that can be fitted onto the stop block 13.

[0064] It should be noted that some rotating work tools 2 can optionally be equipped with a protective cover 2d and a side baffle 2e, for example... Figure 3 The tape opening machine shown is Figure 4 The weeding machine shown; while some rotary implements 2 are simply rotary implements and do not require the installation of the guard 2d and side baffles 2e, for example Figure 5 The sweeper shown.

[0065] Specifically, one side baffle 2e is movably fitted onto the positioning sleeve 12, and the other side baffle 2e is fixedly fitted onto the guide sleeve 2c. This allows the protective cover 2d to be supported from both ends after installation. Then, the rotation of the protective cover 2d is restricted by the engagement of the stop block 13 with the stop hole 2d1, thereby ensuring that the protective cover 2d remains stable during operation.

[0066] Preferably, a stop block 13 may also be provided on the side wall of the support frame 4, so as to be sleeved with the stop hole 2d1 on the adjacent cover 2d, thereby limiting the cover 2d from both ends and improving the stability of the cover 2d after installation.

[0067] like Figure 9 As shown, in this embodiment, the upright frame 4 includes an upright box with a side opening and a side cover plate 4a that is detachably connected to the upright box. The upright box includes a U-shaped plate 4b that is fixed to the cross frame 1 and sealing plates 4c provided at both ends of the U-shaped plate 4b.

[0068] Specifically, the frame 4 has a rectangular structure. The box, composed of a U-shaped plate 4b and a sealing plate 4c, is used to house the rotary drive mechanism 8, while the side cover plate 4a is used to close the box, thereby preventing the rotary drive mechanism 8 inside the box from being disturbed by external environmental factors.

[0069] like Figure 6 , Figure 8 and Figure 9 As shown, in this embodiment, the rotary drive mechanism 8 includes a drive motor 8a, a drive wheel 8c, a chain 8d, and a driven wheel 8e. The drive motor 8a is mounted on the U-shaped plate 4b. The output shaft of the drive motor 8a extends into the vertical box and is driven by the drive wheel 8c. One end of the transmission shaft 7 extends into the vertical box and is driven by the driven wheel 8e. The drive wheel 8c is driven by the driven wheel 8e through the chain 8d.

[0070] When driven, the drive motor 8a is started, which drives the drive wheel 8c to rotate. The drive wheel 8c drives the driven wheel 8e to rotate through the chain 8d, and the driven wheel 8e drives the transmission shaft 7 to rotate.

[0071] Specifically, the output shaft of the drive motor 8a is stepped, forming an axial limiting relationship with the drive wheel 8c. Simultaneously, the end of the output shaft is fixedly connected to the first pressure plate 8b, thus limiting and fixing the drive wheel 8c mounted on the output shaft at both ends. Similarly, the transmission shaft 7 is stepped, forming an axial limiting relationship with the driven wheel 8e. Simultaneously, the end of the transmission shaft 7 is fixedly connected to the second pressure plate 8f, thus limiting and fixing the drive wheel 8c mounted on the output shaft at both ends. The drive motor 8a is preferably positioned above the crossbeam 1 to avoid external interference during actual operation, improving its performance.

[0072] With the above settings, the drive shaft 7 can be stably driven to rotate, and it has strong anti-interference ability, can adapt to use under harsh working conditions, is not easy to be damaged, and has good overall performance. Example

[0073] like Figure 11 As shown, this embodiment provides a quick-change device for machinery. The difference between this device and the first embodiment is that the side support 5 includes a U-shaped horizontal plate 5a, a U-shaped vertical plate 5b, and a reinforcing plate 5c. The top of the U-shaped vertical plate 5b is fixedly connected to one side of the bottom of the U-shaped horizontal plate 5a, thus forming a mutually perpendicular arrangement. Multiple reinforcing plates 5c are provided and arranged at intervals. One end of the reinforcing plate 5c is fixedly connected to the inner side wall of the U-shaped vertical plate 5b, and the other end is fixedly connected to the bottom of the U-shaped horizontal plate 5a.

[0074] Specifically, the U-shaped horizontal plate 5a and the U-shaped vertical plate 5b form an L-shaped structure, and the reinforcing plate 5c has a right-angled triangular structure. The two right-angled surfaces are fixed to the U-shaped horizontal plate 5a and the U-shaped vertical plate 5b respectively, thereby improving the connection stability and structural strength of the two.

[0075] like Figure 10 and Figure 11 As shown, in this embodiment, the crossbar 1 has a U-shaped structure and the shape and size of its inner side match the U-shaped crossbar 5a.

[0076] It is understandable that the above settings enable the U-shaped horizontal plate 5a to be placed on the horizontal frame 1 with both sides in contact, thereby limiting and fixing the U-shaped horizontal plate 5a and improving the structural stability.

[0077] Multiple sets of limiting structures are provided between the cross frame 1 and the U-shaped cross plate 5a. One set of limiting structures includes: a first insertion hole 1a, a second insertion hole 5a1, a stop sleeve 1b, a rod 14, and a pin 15. The first insertion hole 1a is located on both side walls of the cross frame 1, the second insertion hole 5a1 is located on both side walls of the U-shaped cross plate 5a, and the stop sleeve 1b is located on one outer side wall of the cross frame 1. The first insertion hole 1a, the second insertion hole 5a1, and the stop sleeve 1b are arranged coaxially and all match the rod 14. Positioning holes 1b1 are provided on both sides of the stop sleeve 1b, and a locking through hole 14a corresponding to the positioning hole 1b1 is provided at one end of the rod 14. Both the positioning hole 1b1 and the locking through hole 14a match the pin 15.

[0078] During installation, first place the U-shaped horizontal plate 5a inside the horizontal frame 1, then align each set of limiting structures with the first insertion hole 1a and the second insertion hole 5a1. Next, pass the insertion rod 14 through the corresponding first insertion hole 1a and second insertion hole 5a1 until the locking through hole 14a is aligned with the positioning hole 1b1 on the stop sleeve 1b. Finally, pass the pin 15 through the positioning hole 1b1 and the locking through hole 14a, so the insertion rod 14 is limited and locked, and cannot be pulled out from the stop sleeve 1b. At this time, through the cooperation of multiple sets of limiting structures, the U-shaped horizontal plate 5a and the horizontal frame 1 remain locked and fixed, so the side bracket 5 is fixedly installed on the side end of the horizontal frame 1.

[0079] Preferably, reinforcing plates are provided on the two inner side walls of the U-shaped horizontal plate 5a and the two outer side walls of the horizontal frame 1. The reinforcing plates improve the structural strength that is reduced due to drilling, ensure the stability of the connection, and avoid accidental breakage.

[0080] With the above settings, the side bracket 5 and the cross bracket 1 can be installed and fixed conveniently and quickly. The operation is simple, the connection is stable, and the structure is simple and compact, which is convenient for practical application and has a good overall effect.

[0081] The above are merely preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A quick-change device for machinery, characterized in that, include: A crossbeam (1), a rotating work tool (2), and a connecting assembly (3) mounted on the crossbeam (1). One end of the crossbeam (1) is connected to a vertical frame (4), and the other end is detachably connected to a side support (5). The crossbeam (1), the vertical frame (4), and the side support (5) form a concave structure. A T-shaped sleeve (6) is rotatably connected to the side wall of the side support (5) near the vertical frame (4). A corresponding T-shaped sleeve (6) is rotatably connected to the side wall of the vertical frame (4) near the side support (5). The drive shaft (7) is provided on the upright frame (4), and a rotary drive mechanism (8) is provided on the upright frame (4) for driving the drive shaft (7) to rotate along its central axis; the rotary working tool (2) includes a working shaft (2a), one end of the working shaft (2a) is provided with a convex shaft (2a1) for inserting into the T-shaped sleeve (6), and the other end is provided with a mating groove (2a2) for inserting into the drive shaft (7). A locking structure for circumferential limiting is provided between the mating groove (2a2) and the drive shaft (7); The engaging structure includes a locking block (7a) on the end of the drive shaft (7) and a locking groove (2a3) on the bottom wall of the mating groove (2a2), the locking block (7a) and the locking groove (2a3) being matched; the support frame (4) is provided with a first fixed seat (16), a first bearing (9) is installed in the first fixed seat (16), and the drive shaft (7) is installed in the first fixed seat (16) through the first bearing (9); The side bracket (5) is provided with a second fixed seat (10), and the T-sleeve (6) is installed in the second fixed seat (10) through the second bearing (11), and the outer diameter of the T-sleeve (6) and the inner diameter of the second bearing (11) form an interference fit; The rotary work tool (2) includes a working cylinder (2b) fixedly sleeved on the working shaft (2a), and a guide sleeve (2c) movably sleeved on one end of the working shaft (2a) with a docking groove (2a2). After installation, the guide sleeve (2c) can be movably sleeved on the first fixed seat (16). The side support (5) has a positioning sleeve (12) on its side wall near the upright frame (4). After installation, the positioning sleeve (12) can be movably sleeved on the side end of the working cylinder (2b). The rotating work tool (2) includes a protective cover (2d) and side baffles (2e) on both sides of the protective cover (2d). After installation, one of the side baffles (2e) can be movably fitted onto the positioning sleeve (12), and the other side baffle (2e) is fixedly fitted onto the guide sleeve (2c). The side support (5) is provided with a stop block (13) on the side wall near the upright (4), and the protective cover (2d) is provided with a stop hole (2d1) that can be fitted onto the stop block (13).

2. The quick-change device for machinery according to claim 1, characterized in that, The upright frame (4) includes an upright box with a side opening and a side cover plate (4a) detachably connected to the upright box. The upright box includes a U-shaped plate (4b) fixed to the cross frame (1) and sealing plates (4c) at both ends of the U-shaped plate (4b).

3. The quick-change device for machinery according to claim 2, characterized in that, The rotary drive mechanism (8) includes a drive motor (8a), a drive wheel (8c), a chain (8d), and a driven wheel (8e). The drive motor (8a) is mounted on a U-shaped plate (4b). The output shaft of the drive motor (8a) extends into the vertical box and is driven by the drive wheel (8c). One end of the transmission shaft (7) extends into the vertical box and is driven by the driven wheel (8e). The drive wheel (8c) is driven by the driven wheel (8e) through the chain (8d).

4. The quick-change device for machinery according to claim 1, characterized in that, The side support (5) includes a U-shaped horizontal plate (5a), a U-shaped vertical plate (5b) and a reinforcing plate (5c). The top of the U-shaped vertical plate (5b) is fixed to one side of the bottom of the U-shaped horizontal plate (5a) to form a mutually perpendicular arrangement. Multiple reinforcing plates (5c) are provided and arranged at intervals. One end of the reinforcing plate (5c) is fixed to the inner wall of the U-shaped vertical plate (5b) and the other end is fixed to the bottom of the U-shaped horizontal plate (5a).

5. The quick-change device for machinery according to claim 4, characterized in that, The crossbar (1) has a U-shaped structure and its inner side matches the U-shaped cross plate (5a); Multiple sets of limiting structures are provided between the cross frame (1) and the U-shaped cross plate (5a). One set of the limiting structures includes: a first insertion hole (1a), a second insertion hole (5a1), a stop sleeve (1b), a plug rod (14), and a pin (15). The first insertion hole (1a) is located on both side walls of the cross frame (1), the second insertion hole (5a1) is located on both side walls of the U-shaped cross plate (5a), and the stop sleeve (1b) is located on one side outer wall of the cross frame (1). The first insertion hole (1a), the second insertion hole (5a1), and the stop sleeve (1b) are arranged coaxially and are all matched with the plug rod (14). The stop sleeve (1b) has positioning holes (1b1) on both sides, and the insertion rod (14) has a locking through hole (14a) corresponding to the positioning hole (1b1) at one end. The positioning hole (1b1) and the locking through hole (14a) are both matched with the pin (15).

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