Construction machine coupling device

Abstract

This invention discloses an engineering machinery connection device, comprising: a first connecting seat; a second connecting seat including a first strip and a second strip; a first fixing block fixedly connected to the first connecting seat, including a first groove; a second fixing block fixedly connected to the first connecting seat, including a second groove; in the connected state, the first groove surrounds and contacts the first strip, and the second groove surrounds and contacts the second strip; a telescopic assembly including a first telescopic member and a second telescopic member; a fourth connecting member fixedly connected to the first connecting seat; a third connecting member hinged to the fourth connecting member and hinged to the second connecting member; the first connecting member hinged to the second connecting member and fixedly connected to the second telescopic member; in the connected state, the second connecting member and the first groove cooperate; the second telescopic member and the second groove cooperate; in the open state, the second connecting member disengages from contact with the first strip, and the second telescopic member disengages from contact with the second strip.

Description

Technical Field

[0001] This invention relates to the field of engineering machinery parts technology, and in particular to an engineering machinery connection device. Background Technology

[0002] In the field of construction machinery, it is often necessary to connect components. For example, excavators perform diverse tasks and frequently require the replacement of different working devices (buckets, hydraulic shears, breakers, etc.) to meet the diverse needs of different work scenarios. Therefore, providing a construction machinery connection device that can quickly and reliably connect and disconnect two components (such as the excavator's boom and working device) can improve the working efficiency of construction machinery. Summary of the Invention

[0003] The purpose of this invention is to provide an engineering machinery connection device that can quickly and reliably connect and disconnect two components of engineering machinery.

[0004] This invention discloses a connecting device for engineering machinery, used to connect a first component and a second component of engineering machinery, having a connected state and an open state, comprising:

[0005] A first connector is used to connect to the first component;

[0006] The second connecting seat is used to connect with the second component, and includes a first strip and a second strip arranged at intervals and in parallel.

[0007] The first fixing block is fixedly connected to the first connecting seat, and includes a first groove surrounding the outer peripheral surface of the contacting first strip in the connected state;

[0008] The second fixing block is fixedly connected to the first connecting seat and includes a second groove surrounding the outer peripheral surface of the contacting second strip in the connected state. In the connected state, the arc of the first groove surrounding the outer peripheral surface of the contacting first strip is less than 90°, and / or the arc of the second groove surrounding the outer peripheral surface of the contacting second strip is less than 90°.

[0009] A connecting assembly includes a first connector, a second connector, a third connector, a fourth connector, and a telescopic assembly. The telescopic assembly includes a first telescopic member fixedly connected to the first connecting seat and a second telescopic member movable relative to the first telescopic member. The second end of the fourth connector is fixedly connected to the first connecting seat. The second end and the first end of the third connector are respectively hinged to the first end of the fourth connector and to the second end of the second connector. The second end and the first end of the first connector are respectively hinged to the first end of the second connector and fixedly connected to the second telescopic member. In the connected state, the second connector and the first groove cooperate to press the first strip between them, and the second telescopic member and the second groove cooperate to press the second strip between them. In the open state, the second connector disengages from the contact with the first strip, and the second telescopic member disengages from the contact with the second strip. The second telescopic member moves relative to the first telescopic member in a first direction and in a second direction opposite to the first direction to switch the engineering machinery connecting device between the connected state and the open state.

[0010] In some embodiments, in the connected state, the sum of the arc of the second connector around the outer peripheral surface of the first strip and the arc of the first groove around the outer peripheral surface of the first strip is greater than 180°, and the arc of the second groove around the outer peripheral surface of the second strip is less than 90°.

[0011] In some embodiments, the second telescopic member includes a cut surface that is not perpendicular to the first direction, and in the connected state, the cut surface is opposite to the second groove and presses against the second strip.

[0012] In some embodiments, the second connector includes a first hook-shaped member and a second hook-shaped member arranged at intervals, and a first pin and a second pin connected between the first hook-shaped member and the second hook-shaped member. The first hook-shaped member and the second hook-shaped member each include a strip-shaped portion and a bent portion connected to one end of the strip-shaped portion and bent relative to the strip-shaped portion. In the connected state, the bent portions of the first hook-shaped member and the second hook-shaped member are bent relative to the strip-shaped portion towards the first strip-shaped member, and the bent portions of the first hook-shaped member and the second hook-shaped member press against the first strip-shaped member. The first pin connects the strip-shaped portion of the first hook-shaped member and the strip-shaped portion of the second hook-shaped member, and the second pin connects the bent portion of the first hook-shaped member and the bent portion of the second hook-shaped member. The second connector is hinged to the first connector and the third connector respectively through the first pin and the second pin.

[0013] In some embodiments, the second connector further includes a first connecting rod and a second connecting rod, wherein the first connecting rod is connected between the bent portions of the first hook-shaped member and the second hook-shaped member, and the second connecting rod is connected between the strip portions of the first hook-shaped member and the second hook-shaped member.

[0014] In some embodiments, the first connector includes a first bent rod, a second bent rod, and an end member connecting the first end of the first bent rod and the first end of the second bent rod. The second end of the first bent rod and the second end of the second bent rod are each provided with a hinge hole that is hinged to the first pin. The end member is provided with a connecting portion that is fixedly connected to the second telescopic member.

[0015] In some embodiments, both the first bending rod and the second bending rod include a strip segment and a bending segment connected to one end of the strip segment. The bending segment includes a first segment connected to the strip segment and a second segment connected between the first segment and the end member. The first segment of the first bending rod and the first segment of the second bending rod are bent relative to their respective connected strip segments in a direction away from each other. The second segment of the first bending rod and the second segment of the second bending rod are bent relative to their respective connected second segments in a direction close to each other. The first connector further includes a third connecting rod connected between the strip segments of the first bending rod and the strip segments of the second bending rod.

[0016] In some embodiments, the third connector includes a first strip rod, a second strip rod, and a third pin arranged at intervals. The first end of the first strip rod and the first end of the second strip rod are each provided with a hinge hole that is hinged to the second pin. The third pin connects the second end of the first strip rod and the second end of the second strip rod. The hinge holes of the first strip rod and the second strip rod are hinged to the second pin. The third connector is hinged to the fourth connector through the third pin.

[0017] In some embodiments, the first connecting seat includes a first half seat and a second half seat arranged at intervals, the engineering machinery connecting device includes two first fixing blocks that are respectively connected to the first half seat and the second half seat in a one-to-one correspondence, the first connecting seat also includes an L-shaped bending plate fixedly connected between the two first fixing blocks, the second end of the fourth connecting member is fixedly connected to the L-shaped bending plate, the first end of the fourth connecting member is hinged to the third connecting member, and in the connected state, the L-shaped bending plate surrounds the first strip and the first strip is accommodated between the L-shaped bending plate and the bending portion.

[0018] In some embodiments, the first telescopic member includes two piston rods fixedly connected to the L-shaped bending plate, and the second telescopic member includes two cylinders that cooperate with the two piston rods respectively, a connecting block fixedly connected to the two cylinders, and a pressing rod that corresponds to and is fixedly connected to the two cylinders respectively. The first half seat and the second half seat are respectively provided with sliding grooves that correspond to and are slidably engaged with the two cylinders respectively. In the connected state, the two pressing rods press the second connecting member.

[0019] Based on the engineering machinery connection device provided by the present invention, by moving the first telescopic member along the first direction and along the second direction opposite to the first direction, the engineering machinery connection device can be flexibly switched between the connected state and the open state. In the connected state, the connection component can quickly and effectively connect the first connecting seat and the second connecting seat, realizing the quick and effective connection of the first component and the second component. In the open state, the first connecting seat and the second connecting seat can be easily separated, thereby quickly and effectively disassembling the first component and the second component.

[0020] Other features and advantages of the invention will become clear from the following detailed description of exemplary embodiments of the invention with reference to the accompanying drawings. Attached Figure Description

[0021] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings:

[0022] Figure 1 This is a schematic diagram of the structure of the engineering machinery connection device according to an embodiment of the present invention;

[0023] Figure 2 for Figure 1 A schematic diagram of the structure of the first connecting seat of the engineering machinery connection device shown;

[0024] Figure 3 for Figure 1 A schematic diagram of the structure of the second connecting seat of the engineering machinery connecting device shown;

[0025] Figure 4 for Figure 1 A schematic diagram of part of the engineering machinery connection device shown.

[0026] Figure 5 for Figure 1 A schematic diagram of the structure of the first connecting component of the engineering machinery connection device shown;

[0027] Figure 6 for Figure 1 A schematic diagram of the structure of the second connecting component of the engineering machinery connection device shown;

[0028] Figure 7 for Figure 1 A schematic diagram of the structure of the third connecting component of the engineering machinery connection device shown;

[0029] Figure 8 for Figure 1 A schematic diagram of the fourth connector of the engineering machinery connection device shown;

[0030] Figure 9 for Figure 1 The diagram shows a cross-sectional view of the engineering machinery connection device in an open state.

[0031] Figure 10 for Figure 1 A cross-sectional view of the engineering machinery connection device in another open state;

[0032] Figure 11 for Figure 1 The diagram shows a cross-sectional view of the engineering machinery connection device in the connected state. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0035] In the description of this invention, it should be understood that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0036] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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 direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0037] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0038] like Figures 1 to 11 As shown, the engineering machinery connection device in this embodiment is used to connect a first component and a second component of an engineering machinery. The first component and the second component include any two components of the engineering machinery that need to be constantly connected and may be opened. For example, the first component is the working arm of an excavator, and the second component is the bucket, drill bit, or other working devices of a multi-purpose excavator. The engineering machinery connection device has a connected state and an open state. The engineering machinery connection device includes a first connecting seat 71, a second connecting seat 72, a first fixing block 73, a second fixing block 74, and a connection assembly.

[0039] The first connecting seat 71 is used to connect to the first component. The first connecting seat 71 can be detachably or non-detachably connected to the first component. Detachable connection includes connection via connectors, such as bolts and nuts. In the embodiment shown, the first connecting seat 71 is provided with a pin for connection to the first component. In other embodiments, the first connecting seat is non-detachably connected to the first component by welding or integral molding. After the first connecting seat is connected to the first component, it can be easily and quickly connected to or disconnected from the second connecting seat.

[0040] The second connecting seat 72 is used to connect to the second component. The second connecting seat 72 includes a first strip 721 and a second strip 722 arranged at intervals and in parallel. The second connecting seat 72 can be detachably connected to the second component or non-detachably connected. Detachable connection includes connection via connectors, such as bolts and nuts. In other embodiments, the second connecting seat is non-detachably connected to the second component by welding or integral molding. After the second connecting seat is connected to the second component, it can be easily and quickly connected or disconnected from the first connecting part with the first connecting seat. For example, in a multi-purpose excavator, when the boom needs to be replaced with different devices, the first connecting seat on the boom can be connected or disconnected with different second connecting seats of different working devices such as buckets and drill bits, so as to quickly and easily realize the matching and replacement of the boom with different working devices. The first strip 721 and the second strip 722 of the second connecting seat 72 can be quickly connected and quickly disassembled with the first connecting seat. In the embodiment shown in the figure, the first strip 721 and the second strip 722 are columnar connecting members, specifically, pins can be used.

[0041] like Figure 1 , 2 As shown in Figures 4, 9, 10, and 11, the first fixing block 73 is fixedly connected to the first connecting seat 71. The first fixing block 73 includes a first groove 731 surrounding the outer peripheral surface of the first strip 721 in the connected state. In the connected state, the first groove 731 surrounds the first strip 721 and contacts the first strip.

[0042] The second fixing block 74 is fixedly connected to the first connecting seat 71. The second fixing block 74 includes a second groove 741 surrounding the outer peripheral surface of the second strip 722 in the connected state. In the connected state, the second groove 741 surrounds the second strip 722 and contacts the second strip 722.

[0043] In the connected state, the arc of the first groove 731 surrounding the outer peripheral surface of the first strip 721 is less than 90°, and / or the arc of the second groove 741 surrounding the outer peripheral surface of the second strip 722 is less than 90°. The arc of the first groove 731 surrounding the outer peripheral surface of the first strip 721 refers to the arc of the portion of the first groove that contacts the first strip 721 around the first strip. When the entire outer circumference of the first strip is surrounded, the arc of the first strip is 360°; when half of the outer circumference of the first strip is surrounded, the arc is 180°. The meaning of the arc of the second groove 741 surrounding the outer peripheral surface of the second strip 722 is similar to that of the first groove 731 surrounding the outer peripheral surface of the first strip 721. In this embodiment, the outer periphery of the first strip 721 is surrounded by a first groove for less than 1 / 4 turn, and / or the outer periphery of the second strip 722 is surrounded by a second groove for less than 1 / 4 turn. In the embodiment shown in the figure, in the connected state, the arc of the first groove 731 surrounding the outer periphery of the first strip 721 is greater than 90°, and the arc of the second groove 741 surrounding the outer periphery of the second strip 722 is less than 90°. In the open state, the connection or disassembly of the first fixing block and the second fixing block of the first connecting seat with the first strip and the second strip can be achieved more quickly and effectively.

[0044] The connecting assembly includes a first connector 1, a second connector 2, a third connector 3, and a fourth connector 4, and a telescopic assembly. The telescopic assembly includes a first telescopic member 5 fixedly connected to the first connecting seat 71 and a second telescopic member 6 movable relative to the first telescopic member 5. The second end of the fourth connector 4 is fixedly connected to the first connecting seat 71. The second end and the first end of the third connector 3 are respectively hinged to the first end of the fourth connector 4 and to the second end of the second connector 2. The second end and the first end of the first connector 1 are respectively hinged to the first end of the second connector 2 and to the second telescopic member 6. In the fixed connection state, the second connecting member 2 and the first groove 731 cooperate to press the first strip 721 between them, and the second telescopic member 6 and the second groove 741 cooperate to press the second strip 722 between them. In the open state, the second connecting member 2 disengages from the contact with the first strip 721, and the second telescopic member 6 disengages from the contact with the second strip 722. The second telescopic member 6 moves relative to the first telescopic member 5 in a first direction and in a second direction opposite to the first direction to switch the engineering machinery connection device between the connected state and the open state. When the first connecting seat and the second connecting seat move from being separated from each other to being connected to each other, as shown in the figure... Figures 9 to 11In the illustrated embodiment, the engineering machinery connecting device is initially in the open state. The first groove of the first fixing block engages with the first strip, causing the first groove to surround and contact the first strip. Then, the first connecting seat is rotated as a whole, causing the second groove of the second fixing block to engage with the second strip, causing the second groove to surround and contact the second strip. Next, the second telescopic member moves relative to the first telescopic member along a first direction, moving away from the first telescopic member. The first telescopic member pulls the first connecting member, which in turn drives the second and third connecting members to rotate. The second connecting member presses against the first strip, while the second telescopic member moves to the position pressing against the second strip, thus quickly and effectively forming a reliable connection between the first and second connecting seats. When the first and second connecting seats are connected to each other and then separated, as... Figures 9 to 11 In the illustrated embodiment, the engineering machinery connecting device is initially in a connected state, causing the second telescopic member to move relative to the first telescopic member along a second direction, causing the second telescopic member to move closer to the first telescopic member. The first telescopic member drives the first connecting member to move, and the first connecting member drives the second connecting member and the third connecting member to rotate. The second telescopic member disengages from the contact with the second strip and moves away from the second strip, and the second connecting member disengages from the contact with the first strip and moves away from the first strip. Then, the first connecting seat can be rotated as a whole, causing the second groove to disengage from the second strip, and then causing the first groove to disengage from the first strip, so that the first connecting seat and the second connecting seat can be quickly and effectively disassembled and separated.

[0045] In this embodiment, the engineering machinery connecting device can flexibly switch between a connected state and an open state by moving the first telescopic member 5 along a first direction and along a second direction opposite to the first direction. In the connected state, the connecting component can quickly and effectively connect the first connecting seat 71 and the second connecting seat 72, realizing a quick and effective connection between the first component and the second component. In the open state, the first connecting seat 71 and the second connecting seat 72 can be easily separated, thereby quickly and effectively disassembling the first component and the second component.

[0046] In some embodiments, in the connected state, the sum of the arc of the second connector 2 around the outer peripheral surface of the contacting first strip 721 and the arc of the first groove 731 around the outer peripheral surface of the contacting first strip 721 is greater than 180°, and the arc of the second groove 741 around the outer peripheral surface of the contacting second strip 722 is less than 90°. This embodiment can ensure the quick and effective connection and separation of the first and second components. Furthermore, in the connected state, even if the second connector becomes loose due to external factors and cannot be pressed tightly against the first strip, a reliable connection between the first and second connecting seats can still be guaranteed, improving the safety of the connection.

[0047] In some embodiments, such as Figure 11As shown, the second telescopic member 6 includes a cross-section 631 that is not perpendicular to the first direction. The cross-section 631 can be a single surface inclined relative to the cross-section of the second telescopic member 6, an arc-shaped surface, or a grooved surface formed by two surfaces with an included angle. In the embodiment shown, the cross-section is formed by two surfaces with an included angle. In the connected state, the cross-section 631 faces and presses against the second strip 722 against the second groove 741. In the connected state, the arc of the cross-section 631 and the second groove 741 around the contacting second strip is greater than 90°, enabling a reliable connection to the second strip. In the open state, after the cross-section 631 disengages from the contact with the second strip, the second groove can easily disengage from the second strip.

[0048] In some embodiments, such as Figure 6 As shown, the second connector 2 includes a first hook-shaped member 21 and a second hook-shaped member 22 arranged at intervals, and a first pin 81 and a second pin 82 connecting the first hook-shaped member 21 and the second hook-shaped member 22. Both the first hook-shaped member 21 and the second hook-shaped member 22 include a strip-shaped portion 211 and a bent portion 212 connected to one end of the strip-shaped portion 211 and bent relative to the strip-shaped portion 211. In the connected state, the bent portions 212 of the first hook-shaped member 21 and the second hook-shaped member 22 move closer to each other relative to the strip-shaped portion 211. The first strip 721 is bent in the direction of the first hook 21 and the bent portions 212 of the second hook 22 press against the first strip 721. A first pin 81 connects the strip portion 211 of the first hook 21 and the strip portion 211 of the second hook 22. A second pin 82 connects the bent portions 212 of the first hook 21 and the bent portions 212 of the second hook 22. The second connecting member 2 is hinged to the first connecting member 1 and the third connecting member 3 through the first pin 81 and the second pin 82, respectively. In this embodiment, the second connecting member can flexibly switch between the connected state and the open state. In the connected state, it reliably and stably presses against the first strip 721, making the connection between the first connecting seat and the second connecting seat more stable and reliable.

[0049] In some embodiments, in order to improve the structural strength of the second connector 2, the second connector 2 further includes a first connecting rod 91 and a second connecting rod 92. The first connecting rod 91 is connected between the bent portion 212 of the first hook-shaped member 21 and the second hook-shaped member 22, and the second connecting rod 92 is connected between the strip portion 211 of the first hook-shaped member 21 and the second hook-shaped member 22.

[0050] In some embodiments, to enable the first connecting member 1 to reliably and effectively drive the second connecting member 2, the first connecting member 1 includes a first bent rod 11 and a second bent rod 12 arranged at intervals, and an end member 13 connecting the first end of the first bent rod 11 and the first end of the second bent rod 12. The second end of both the first bent rod 11 and the second end of the second bent rod 12 are provided with hinge holes for hinged to the first pin 81. The end member 13 is provided with a connecting portion for fixed connection to the second telescopic member 6. In the embodiment shown in the figure, the end member 13 is fixedly connected to the second telescopic member 6 by bolts and nuts.

[0051] In some embodiments, such as Figure 5 As shown, in order to improve the structural strength of the first connector 1, both the first bending rod 11 and the second bending rod 12 include a strip-shaped rod segment 111 and a bending rod segment 112 connected to one end of the strip-shaped rod segment 111. The bending rod segment 112 includes a first segment 1121 connected to the strip-shaped rod segment 111 and a second segment 1122 connected between the first segment 1121 and the end member 13. The first segment 1121 of the first bending rod 11 and the first segment 1121 of the second bending rod 12 are bent relative to their respective connected strip-shaped rod segments 111 in a direction away from each other. The second segment 1122 of the first bending rod 11 and the second segment 1122 of the second bending rod 12 are bent relative to their respective connected second segments 1122 in a direction close to each other. The first connector 1 also includes a third connecting rod 93 connecting the strip-shaped rod segment 111 of the first bending rod 11 and the strip-shaped rod segment 111 of the second bending rod 12.

[0052] In some embodiments, the third connector 3 includes a first strip rod 31, a second strip rod 32, and a third pin 83 arranged at intervals. The first end of the first strip rod 31 and the first end of the second strip rod 32 are each provided with a hinge hole that is hinged to the second pin 82. The third pin 83 connects the second end of the first strip rod 31 and the second end of the second strip rod 32. The hinge holes of the first strip rod 31 and the second strip rod 32 are hinged to the second pin 82. The third connector 3 is hinged to the fourth connector 4 through the third pin 83.

[0053] In some embodiments, the first connecting seat 71 includes a first half-seat 711 and a second half-seat 712 arranged at intervals. The engineering machinery connecting device includes two first fixing blocks 73 that are respectively connected to the first half-seat 711 and the second half-seat 712 in a one-to-one correspondence. The first connecting seat 71 also includes an L-shaped bending plate 713 fixedly connected between the two first fixing blocks 73. The second end of the fourth connecting member 4 is fixedly connected to the L-shaped bending plate 713, and the first end of the fourth connecting member 4 is hinged to the third connecting member 3. In the connected state, the L-shaped bending plate 713 surrounds the first strip 721, and the first strip 721 is accommodated between the L-shaped bending plate 713 and the bending portion 212. The L-shaped bending plate 713 can fix the fourth connecting member and provide redundant protection for the connection with the first strip in the connected state, improving the connection reliability of the first strip. At the same time, the L-shaped bending plate 713 can also protect the connecting components from dust in the connected state.

[0054] In some embodiments, as shown in the figure, the first telescopic member 5 includes two piston rods 51 fixedly connected to the L-shaped bending plate 713, and the second telescopic member 6 includes two cylinders 62 that respectively cooperate with the two piston rods 51, a connecting block fixedly connecting the two cylinders 62, and a pressing rod 63 that corresponds to and is fixedly connected to the two cylinders 62 respectively. The first half-seat 711 and the second half-seat 712 are respectively provided with sliding grooves that correspond to and are slidably engaged with the two cylinders 62 respectively. In the connected state, the two pressing rods 63 press the second connecting member 2. The telescopic assembly of this embodiment adopts a dual-cylinder mode to avoid the risk of single-cylinder failure, and when the cylinders extend, they simultaneously lock the first strip and the second strip, making the structure simple and reliable.

[0055] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of the present invention or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solutions of the present invention, and all such modifications and substitutions should be covered within the scope of the technical solutions claimed in the present invention.

Claims

1. A connecting device for engineering machinery, used to connect a first component and a second component of engineering machinery, characterized in that, It has connected and open states, including: A first connector is used to connect to the first component; The second connecting seat is used to connect with the second component, and includes a first strip and a second strip arranged at intervals and in parallel. The first fixing block is fixedly connected to the first connecting seat, and includes a first groove surrounding the outer peripheral surface of the contacting first strip in the connected state; The second fixing block is fixedly connected to the first connecting seat and includes a second groove surrounding the outer peripheral surface of the contacting second strip in the connected state. In the connected state, the arc of the first groove surrounding the outer peripheral surface of the contacting first strip is less than 90°, and / or the arc of the second groove surrounding the outer peripheral surface of the contacting second strip is less than 90°. A connecting assembly includes a first connector, a second connector, a third connector, a fourth connector, and a telescopic assembly. The telescopic assembly includes a first telescopic member fixedly connected to the first connecting seat and a second telescopic member movable relative to the first telescopic member. The second end of the fourth connector is fixedly connected to the first connecting seat. The second end and the first end of the third connector are respectively hinged to the first end of the fourth connector and to the second end of the second connector. The second end and the first end of the first connector are respectively hinged to the first end of the second connector and fixedly connected to the second telescopic member. In the connected state, the second connector and the first groove cooperate to press the first strip between them, and the second telescopic member and the second groove cooperate to press the second strip between them. In the open state, the second connector disengages from contact with the first strip, and the second telescopic member disengages from contact with the second strip. The second telescopic member moves relative to the first telescopic member along the first groove. The engineering machinery connecting device can be switched between a connected state and an open state by moving in one direction and in a second direction opposite to the first direction; the second connecting member includes a first hook-shaped member and a second hook-shaped member arranged at intervals, and a first pin and a second pin connected between the first hook-shaped member and the second hook-shaped member. The first hook-shaped member and the second hook-shaped member each include a strip-shaped portion and a bent portion connected to one end of the strip-shaped portion and bent relative to the strip-shaped portion. In the connected state, the bent portions of the first hook-shaped member and the second hook-shaped member bend relative to the strip-shaped portion towards the first strip-shaped member, and the bent portions of the first hook-shaped member and the second hook-shaped member press against the first strip-shaped member. The first pin connects the strip-shaped portion of the first hook-shaped member and the strip-shaped portion of the second hook-shaped member, and the second pin connects the bent portion of the first hook-shaped member and the bent portion of the second hook-shaped member. The second connecting member is hinged to the first connecting member and the third connecting member respectively through the first pin and the second pin.

2. The engineering machinery connection device as described in claim 1, characterized in that, In the connected state, the sum of the arc of the second connector around the outer peripheral surface of the first strip and the arc of the first groove around the outer peripheral surface of the first strip is greater than 180°, and the arc of the second groove around the outer peripheral surface of the second strip is less than 90°.

3. The engineering machinery connection device as described in claim 2, characterized in that, The second telescopic member includes a cut surface that is not perpendicular to the first direction. In the connected state, the cut surface is opposite to the second groove and presses against the second strip.

4. The engineering machinery connection device as described in claim 1, characterized in that, The second connector further includes a first connecting rod and a second connecting rod. The first connecting rod is connected between the bent portions of the first hook-shaped member and the second hook-shaped member, and the second connecting rod is connected between the strip-shaped portions of the first hook-shaped member and the second hook-shaped member.

5. The engineering machinery connection device as described in claim 1, characterized in that, The first connector includes a first bent rod, a second bent rod, and an end component that connects the first end of the first bent rod and the first end of the second bent rod. The second end of the first bent rod and the second end of the second bent rod are each provided with a hinge hole that is hinged to the first pin. The end component is provided with a connecting part that is fixedly connected to the second telescopic member.

6. The engineering machinery connection device as described in claim 5, characterized in that, Both the first bending rod and the second bending rod include a strip-shaped rod segment and a bending rod segment connected to one end of the strip-shaped rod segment. The bending rod segment includes a first segment connected to the strip-shaped rod segment and a second segment connected between the first segment and the end member. The first segment of the first bending rod and the first segment of the second bending rod are bent relative to their respective connected strip-shaped rod segments in a direction away from each other. The second segment of the first bending rod and the second segment of the second bending rod are bent relative to their respective connected second segments in a direction close to each other. The first connector also includes a third connecting rod connected between the strip-shaped rod segments of the first bending rod and the strip-shaped rod segments of the second bending rod.

7. The engineering machinery connection device as described in claim 1, characterized in that, The third connecting member includes a first strip rod, a second strip rod, and a third pin arranged at intervals. The first end of the first strip rod and the first end of the second strip rod are each provided with a hinge hole that is hinged to the second pin. The third pin connects the second end of the first strip rod and the second end of the second strip rod. The hinge holes of the first strip rod and the second strip rod are hinged to the second pin. The third connecting member is hinged to the fourth connecting member through the third pin.

8. The engineering machinery connection device as described in claim 7, characterized in that, The first connecting seat includes a first half seat and a second half seat arranged at intervals. The engineering machinery connecting device includes two first fixing blocks that are respectively connected to the first half seat and the second half seat in a one-to-one correspondence. The first connecting seat also includes an L-shaped bending plate fixedly connected between the two first fixing blocks. The second end of the fourth connecting member is fixedly connected to the L-shaped bending plate. The first end of the fourth connecting member is hinged to the third connecting member. In the connected state, the L-shaped bending plate surrounds the first strip and the first strip is accommodated between the L-shaped bending plate and the bending portion.

9. The engineering machinery connection device as described in claim 8, characterized in that, The first telescopic component includes two piston rods fixedly connected to the L-shaped bending plate. The second telescopic component includes two cylinders that cooperate with the two piston rods, a connecting block that is fixedly connected to the two cylinders, and a pressing rod that corresponds to and is fixedly connected to the two cylinders. The first half-seat and the second half-seat are respectively provided with sliding grooves that correspond to and are slidably engaged with the two cylinders. In the connected state, the two pressing rods press the second connecting component.

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