Quick connecting mechanism for auxiliary tool of excavator

Abstract

The utility model provides an excavator assistive device quick connecting mechanism which comprises a mounting base used for being connected with a working wall of an excavator, a first jaw used for a first clamping shaft of an assistive device is arranged at the right end of the mounting base, and a limiting baffle is arranged on the upper portion of the left end of the mounting base in an outward protruding mode. A sliding block capable of sliding in the left-right direction and a driving assembly are arranged in the mounting base, and the driving assembly is used for driving the sliding block to move to a first position and a second position; in the first position, the left end of the sliding block protrudes out of the left end of the mounting seat, so that a second jaw for a second clamping shaft of the auxiliary tool is formed between the sliding block and the limiting baffle; and in the second position, the left end of the sliding block is flush with the left end of the mounting seat or located on the right side of the left end of the mounting seat, so that the second clamping shaft can be separated from the second jaw. According to the quick connecting mechanism for the auxiliary tool of the excavator, the clamping structure of the clamping shaft of the auxiliary tool is simple, installation is convenient, and disassembly is easy and convenient when the auxiliary tool is replaced.

Description

Technical Field

[0001] The utility model relates to the technical field of excavators, in particular to a quick connection mechanism for auxiliary tools of excavators. Background Art

[0002] With the popular use of hydraulic excavators in engineering construction, their functions are no longer limited to excavation operations, and many operating functions have gradually been extended. For example, the bucket can be replaced with other auxiliary tools, such as a rotary drill for drilling operations, or a wood grabber for wood grabbing operations, or a breaker for concrete crushing operations.

[0003] Because of the extension of the excavator's functions, it is necessary to constantly replace the auxiliary tools with corresponding functions. At present, the working arm and auxiliary tools of hydraulic excavators are mainly connected by two connecting shafts. If other auxiliary tools are replaced, the pin shaft needs to be disassembled and reassembled, and the disassembly process is laborious. Moreover, after the excavator has been used for a period of time, the pin shaft wears out and is difficult to disassemble, which greatly wastes manpower and prolongs the construction time.

[0004] Therefore, how to achieve quick connection of auxiliary tools has become a common problem. Patent CN213773531U discloses a quick-change joint for excavators. Although it solves the problem of quick disassembly and replacement of the excavator working arm and auxiliary tools, the locking structure of one of the auxiliary tool's card pins in the quick-change joint structure of the patent is relatively complicated, and there are many connecting rod structures, which is difficult to install. In addition, jamming or failure of the intermediate linkage parts may occur during use, which greatly shortens the service life of the entire quick-change joint. Utility Model Content

[0005] The problem solved by the utility model is to provide a quick connection mechanism for an auxiliary tool of an excavator in order to overcome at least one defect in the prior art. The clamping structure of the clamping shaft of the auxiliary tool is simple, the installation is convenient, and the disassembly is easy and convenient when the auxiliary tool is replaced.

[0006] In order to solve the above problems, the utility model provides a quick connection mechanism for excavator auxiliary tools, which includes a mounting seat, the upper end of the mounting seat is provided with two parallel and spaced connection plates, two connecting shafts for being hinged to the working arm of the excavator are arranged between the two connecting plates, the right end of the mounting seat is provided with a first jaw for engaging with the first clamping shaft of the auxiliary tool, the upper part of the left end of the mounting seat is convexly provided with a limiting baffle, a slider slidable in the left and right directions and a driving assembly are arranged in the mounting seat, the driving assembly is used to drive the slider to move to the first position to the left and to the second position to the right; and in the first position, the left end of the slider protrudes from the left end of the mounting seat, so that a second jaw for engaging with the second clamping shaft of the auxiliary tool is formed between the slider and the limiting baffle; in the second position, the left end of the slider is flush with the left end of the mounting seat or is located on the right side of the left end of the mounting seat, so that the second clamping shaft can be disengaged from the second jaw.

[0007] Compared with the prior art, the quick connection mechanism of the excavator auxiliary tool of the utility model has the following advantages:

[0008] In the quick connection mechanism of the auxiliary tool of the excavator of the utility model, a fixed first jaw is provided at one end of the mounting seat, and a second jaw is provided at the other end, and the second jaw is not fixed, and one of its engaging parts is movable, that is, when the auxiliary tool is installed, it only needs to movably engage its first engaging shaft into the first jaw, and then abut the second engaging shaft against the limit baffle, and then drive the slider to slide to the left through the driving component, so that the slider can be engaged with the other side of the second engaging shaft; the same is true when disassembling, as long as the driving component drives the slider to move toward the first jaw side to the second position, the limit on the second engaging shaft can be released, the second engaging shaft can be quickly disengaged from the second jaw, and finally the first engaging shaft can be disengaged from the first jaw. The structure is simple, and the replacement of the auxiliary tool is very convenient and fast.

[0009] As an improvement, the upper end of the mounting seat is concavely provided with a mounting groove connected to the left and right, the slider is slidably provided at the left end of the mounting groove, and the front and rear side walls of the left end of the mounting groove are provided with guide grooves, and the front and rear sides of the slider are provided with guide convex edges that slide with the two guide grooves. In the above improved structure, the provision of the guide groove and the guide convex edge allows the slider to slide on the mounting seat with better linearity and can be limited in the vertical direction.

[0010] In a further improvement, the front and rear side walls of the left end of the mounting seat are respectively provided with grease nipples for filling lubricating oil into the two guide grooves. In the above improved structure, the grease nipples can be used to fill lubricating oil into the corresponding guide grooves at any time to ensure that the slider slides flexibly without jamming.

[0011] In a further improvement, a first arc angle is provided at the connection between the limit baffle and the mounting seat, a horizontal section and a vertical section are provided at the left end of the slider, and a second arc angle is provided between the horizontal section and the vertical section, and the center of the second arc angle coincides with the center of the first arc angle. In the above improved structure, the two arc angles are provided so that the second clamping shaft has a large contact area in the second jaw, the clamping is more stable, and the arc surface contact can also reduce the wear of the slider.

[0012] In a further improvement, the bottom of the first jaw is an arc-shaped groove, and the lower end surface of the opening end of the first jaw is concave and provided with an arc-shaped pre-hanging position. In the above improved structure, the arc-shaped groove can make the contact area of ​​the auxiliary tool's clamping shaft large and the stability high when clamping; in addition, the pre-hanging position makes the first clamping shaft stably hang in the first jaw before the second clamping shaft is clamped, and it is not easy to fall off.

[0013] In a further improvement, a positioning block is provided on the right side of the mounting groove, and an elastic reset member is provided between the right side of the slider and the positioning block, so that the slider always has a tendency to move toward the left end of the mounting seat to the first position. In the above improved structure, the elastic reset member is provided so that the slider can be stably maintained in the first position during operation, and the auxiliary tool clamping shaft is firmly installed to prevent the auxiliary tool from being separated from the working arm, thereby ensuring the ease of use and installation.

[0014] Preferably, the elastic reset member includes at least one cylindrical spring, and the two ends of the cylindrical spring are respectively in contact with the slider and the positioning block. In the above structure, a cylindrical spring is selected as the elastic member, which has a simple structure and is easy to install. The two ends only need to be in contact, and the elastic force is stable, ensuring stable reset of the slider.

[0015] In a further improvement, a positioning rod is provided on the right side wall of the slider, the left end of the cylindrical spring is sleeved on the outside of the positioning rod, and a movable space for the slider to move right is reserved between the right end of the positioning rod and the positioning block. In the above improved structure, the positioning makes the cylindrical spring remain stable during the expansion and contraction process and will not pop out of the installation groove.

[0016] Furthermore, the driving assembly includes a lever and a lever fixing shaft, the two ends of the lever fixing shaft are respectively rotatably connected to the two side walls of the left end of the mounting groove, an inwardly concave mounting groove is provided in the middle of the right end of the sliding block, a positioning pin is provided between the two side walls of the mounting groove, the lower end of the lever can be movably inserted in the mounting groove, and the right side wall of the lower end of the lever abuts against the positioning pin, a square positioning through hole is provided at the bottom of the left end of the mounting groove, the bottom of the lever extends downward to pass through the positioning through hole, and the left side wall of the lower end of the lever abuts against the left side wall of the positioning through hole.

[0017] In a further improvement, the right side wall of the lower end of the lever is an arc-shaped surface, and the right side of the bottom of the lever is provided with an arc-shaped positioning groove for engaging with the positioning pin. In the above improved structure, the rear side of the lower end of the lever is made into an arc-shaped surface to ensure that when the lever is rotated, the right side thereof slides smoothly with the positioning pin; in addition, the positioning groove provided at the bottom of the lever can limit the rotation limit position of the lever to avoid excessive rotation of the lever and failure of the guide.

[0018] Other improved features and advantages of the utility model will be described in the subsequent specific embodiments, and partly become apparent from the description, or understood by implementing the utility model. The purpose and other advantages of the utility model can be achieved and obtained through the structures specifically pointed out in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a connecting frame structure with a clamping shaft on the auxiliary tool in the prior art;

[0020] Figure 2 It is a structural schematic diagram of the quick connection mechanism of the excavator auxiliary tool of the utility model;

[0021] Figure 3 This is a front view of the quick connection mechanism of the excavator auxiliary tool of the utility model;

[0022] Figure 4 This is a schematic structural diagram of the quick connection mechanism of the excavator auxiliary tool of the utility model from another angle;

[0023] Figure 5 It is a cross-sectional view of the quick connection mechanism of the excavator auxiliary tool of the utility model;

[0024] Figure 6 This is a structural diagram of another working state of the quick connection mechanism of the excavator auxiliary tool of the utility model.

[0025] Description of reference numerals:

[0026] 1. Mounting seat; 2. Connecting plate; 3. Connecting shaft; 4. First clamping shaft; 5. First jaw; 6. Limit baffle; 7. Sliding block; 8. Second clamping shaft; 9. Second jaw; 10. Guide groove; 11. Guide convex edge; 12. Grease nozzle; 13. First arc angle; 14. Second arc angle; 15. Pre-hanging position; 16. Positioning block; 17. Elastic reset member; 18. Positioning rod; 19. Push rod; 20. Push rod connecting shaft; 21. Mounting groove; 22. Positioning pin; 23. Positioning through hole; 24. Arc surface; 25. Positioning groove. DETAILED DESCRIPTION

[0027] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and understandable, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0028] In the description of the present invention, it should be noted that the terms "front and back", "left and right", "upper end", "lower end", "side wall" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention. In other words, in other embodiments, when the direction of the entire device is changed, the directions indicated by the corresponding "upper end", "lower end", "left end" and "right end" will change accordingly.

[0029] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] like Figures 2 to 6 As shown, the utility model provides a quick connection mechanism for excavator accessories, which includes a mounting seat 1, an upper end of which is provided with two parallel connecting plates 2 spaced apart at the front and rear sides, and two connecting shafts 3 for being hinged to the working arm of the excavator are provided between the two connecting plates 2.

[0031] In addition, a first jaw 5 for engaging with a first clamping shaft 4 of an auxiliary tool is provided at the right end of the mounting seat 1, a limiting baffle 6 is provided on the upper protruding portion of the left end of the mounting seat, and a slider 7 slidable in the left and right directions and a driving assembly are provided in the mounting seat 1, the driving assembly is used to drive the slider 7 to move to the left to a first position and to the right to a second position; and in the first position, the left end of the slider 7 protrudes from the left end of the mounting seat 1, so that a second jaw 9 for engaging with a second clamping shaft 8 of an auxiliary tool is formed between the slider 7 and the limiting baffle 6; in the second position, the slider 7 moves to the right until its left end is flush with the left end of the mounting seat 1 or is further to the right than the left end face of the mounting seat 1, so that the second clamping shaft 8 can be easily detached from the second jaw 9.

[0032] Specifically, the upper end of the mounting seat 1 is concavely provided with a mounting groove connected to the left and right sides, the slider 7 is slidably arranged at the left end of the mounting groove, and guide grooves 10 are provided on the front and rear side walls of the left end of the mounting groove, and the front and rear sides of the slider 7 are provided with guide convex edges 11 that slide with the two guide grooves 10. In this embodiment, the mounting seat 1 includes a horizontal bottom plate, and two vertical mounting plates are respectively arranged on the front and rear sides of the horizontal bottom plate, and the two vertical mounting plates and the horizontal bottom plate form the above-mentioned mounting groove. More specifically, the horizontal bottom plate and the two vertical mounting plates are welded and fixed. In other embodiments, the mounting groove connected to the left and right sides can also be directly machined on a complete mounting seat 1. In this structure, the left end of the mounting groove extends to the left end of the mounting seat 1, so that the limit baffle 6 is divided into two parts such as Figure 4 shown.

[0033] In addition, in the above structure, in order to ensure that the guide flange 11 slides more flexibly and smoothly in the guide groove 10, grease nipples 12 are respectively provided on the front and rear side walls of the left end of the mounting seat 1, and lubricating oil can be added to the two guide grooves 10 through the corresponding grease nipples 12.

[0034] In this embodiment, Figure 2 , 4 As shown, a first arc angle 13 is provided at the connection between the limit baffle 6 and the mounting seat 1, a horizontal section and a vertical section are provided at the left end of the slider 7, and a second arc angle 14 is provided between the horizontal section and the vertical section, and the center of the second arc angle 14 coincides with the center of the first arc angle 13; in this structure, the two arc angles are provided so that the clamping contact area of ​​the second clamping shaft 8 in the second jaw 9 is large, the clamping is more stable, and the contact of the arc surface 24 can also reduce the wear of the slider 7.

[0035] like Figure 3 As shown, the bottom of the first jaw 5 is also an arc-shaped groove, and the lower end surface of the opening end of the first jaw 5 is concave and provided with an arc-shaped pre-hanging position 15; the arc-shaped groove can make the contact area of ​​the auxiliary tool's clamping shaft large and the stability high when clamping; in addition, the pre-hanging position 15 makes the first clamping shaft 4 stably mounted in the first jaw 5 before the second clamping shaft 8 is clamped, and it is not easy to fall off.

[0036] In this embodiment, Figure 5 , 6As shown, a positioning block 16 is provided on the right side of the mounting groove, and an elastic reset member 17 is provided between the right side of the slider 7 and the positioning block 16, so that the slider 7 always has a tendency to move to the first position toward the left end of the mounting seat 1. Preferably, the elastic reset member 17 includes at least one cylindrical spring, and the two ends of the cylindrical spring are respectively in contact with the slider 7 and the positioning block 16. In this embodiment, there are two cylindrical springs, and the two cylindrical springs are arranged parallel to each other on the front and rear sides of the mounting groove. The two cylindrical springs make the elastic reset force more stable and reliable, so that the second jaw 9 formed by the slider 7 and the limit baffle 6 is firmly engaged on the outside of the second clamping shaft 8, ensuring that the auxiliary tool is stable and safe to use. In this structure, more specifically, a positioning rod 18 is provided on the right side wall of the slider 7, and the left end of the cylindrical spring is sleeved on the outside of the positioning rod 18, and there is a movable space between the right end of the positioning rod 18 and the positioning block 16 for the slider 7 to move right.

[0037] In this embodiment, Figure 2 , 4 As shown in Figure 5, the driving assembly includes a lever 19 and a lever fixing shaft 20. The two ends of the lever fixing shaft 20 are rotatably connected to the two side walls of the left end of the mounting groove, and the middle part of the lever 19 is connected to the outside of the lever fixing shaft 20. The middle part of the right end of the slider 7 is provided with a concave fitting groove 21, and a positioning pin 22 is provided between the two side walls of the fitting groove 21. The lower end of the lever 19 is movably inserted into the fitting groove 21, and the right side wall of the lower end of the lever 19 is in contact with the positioning pin 22. When a force is applied to the end so that it rotates to the left around the lever fixing axis 20, the rear side of its lower end can push the positioning pin 22 to drive the entire slider 7 to move to the right; in addition, a square positioning through hole 23 is provided at the bottom of the left end of the mounting groove, and the bottom of the lever 19 extends downward to pass through the positioning through hole 23, and when the slider 7 is in the first position, the left side wall of the lower end of the lever 19 abuts against the left side wall of the positioning through hole 23, so as to prevent the slider 7 from moving excessively to the left under the action of the elastic reset member 17.

[0038] In the above structure, if Figure 5 As shown, the right side wall of the lower end of the lever 19 is an arcuate surface 24, which ensures that when the lever 19 is rotated, its right side slides smoothly with the positioning pin 22; in addition, a circular arc-shaped positioning groove 25 for engaging with the positioning pin 22 is provided on the right side of the bottom of the lever 19. When the lever 19 is rotated to the left to the extreme position, that is, the slider 7 is in the second position, the positioning groove 25 engages with the positioning pin 22 and no longer rotates, thereby avoiding excessive rotation of the lever 19 and failure of the guide.

[0039] The auxiliary tool quick change process is as follows:

[0040] like Figure 6As shown, before connecting the auxiliary tool, the lever 19 is rotated to the left to the set position. At this time, the positioning groove 25 on the right side of the lower end of the lever 19 cooperates with the outside of the positioning pin 22, so that the slider 7 can be moved to the right to the second position and maintained in this position, and at this time, the lower end surface of the upper end of the lever 19 is lower than the lower end surface of the limit baffle 6; then the corresponding first clamping shaft 4 of the auxiliary tool is first movably clamped into the first jaw 5, and then one end of the second clamping shaft 8 of the auxiliary tool is rotated toward the left end of the mounting seat 1, and the second clamping shaft 8 on the auxiliary tool will first contact the lever 19, and collide with the upper end of the lever 19, so that the lever 19 rotates in the opposite direction to the right. At this time, under the action of the elastic reset member 17, the slider 7 is moved to the left and reset until the slider 7 is clamped on the lower end surface of the second clamping shaft 8, that is, the second clamping shaft 8 is clamped and limited in the second jaw 9 composed of the limit baffle 6 and the slider 7, and finally the auxiliary tool and the working arm are quickly connected. Of course, in this structure, when the second clamping shaft 8 is locked, the lever 19 can also be driven to rotate by a dedicated workpiece.

[0041] Similarly, when disassembling the auxiliary tool, the lever 19 is driven to rotate to the left by a special tool. Under the driving action of the rear side wall of the lower end of the lever 19, the slider 7 moves to the right until the left end face of the slider 7 is flush with the left end of the mounting seat 1 or is further to the right than the left end face of the mounting seat 1. The second clamping shaft 8 is disengaged from the second jaw 9, and finally the first clamping shaft 4 is pulled out of the first jaw 5.

[0042] Although the utility model is disclosed as above, the protection scope of the utility model is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the utility model, and these changes and modifications will fall within the protection scope of the utility model.

Claims

1. A quick connection mechanism for an excavator auxiliary tool, comprising a mounting seat (1), wherein the upper end of the mounting seat (1) is provided with two parallel and spaced connection plates (2), and between the two connection plates (2) are two connection shafts (3) for articulating with the working arm of the excavator, characterized in that: The right end of the mounting seat (1) is provided with a first jaw (5) for engaging with a first clamping shaft (4) of an auxiliary tool, and the upper part of the left end of the mounting seat (1) is provided with a limit baffle (6) protruding outwardly, and a slider (7) slidable in the left and right directions and a driving component are provided in the mounting seat (1), and the driving component is used to drive the slider (7) to move to the left to a first position and to the right to a second position; and in the first position, the left end of the slider (7) protrudes from the left end of the mounting seat (1), so that a second jaw (9) for engaging with a second clamping shaft (8) of the auxiliary tool is formed between the slider (7) and the limit baffle (6); in the second position, the left end of the slider (7) is flush with the left end of the mounting seat (1) or is located on the right side of the left end of the mounting seat (1), so that the second clamping shaft (8) can be disengaged from the second jaw (9).

2. The quick connection mechanism for excavator accessories according to claim 1, characterized in that: The upper end of the mounting seat (1) is concavely provided with a mounting groove connected to the left and right sides, the sliding block (7) is slidably arranged at the left end of the mounting groove, and the front and rear side walls of the left end of the mounting groove are provided with guide grooves (10), and the front and rear sides of the sliding block (7) are provided with guide convex edges (11) that are slidably matched with the two guide grooves (10).

3. The quick connection mechanism for excavator accessories according to claim 2, characterized in that: Grease nipples (12) for filling lubricating oil into the two guide grooves (10) are respectively arranged on the front and rear side walls at the left end of the mounting seat (1).

4. The quick connection mechanism for excavator accessories according to claim 1, characterized in that: A first arc angle (13) is provided at the connection between the limit baffle (6) and the mounting seat (1), a horizontal section and a vertical section are provided at the left end of the sliding block (7), and a second arc angle (14) is provided between the horizontal section and the vertical section, and the center of the second arc angle (14) coincides with the center of the first arc angle (13).

5. The quick connection mechanism for excavator accessories according to claim 1, characterized in that: The bottom of the first jaw (5) is an arc-shaped groove, and the lower end surface of the opening end of the first jaw (5) is concave and provided with an arc-shaped pre-hanging position (15).

6. The quick connection mechanism for excavator accessories according to claim 2, characterized in that: A positioning block (16) is provided on the right side of the mounting groove, and an elastic reset member (17) is provided between the right side of the slider (7) and the positioning block (16), so that the slider (7) always has a tendency to move toward the left end of the mounting seat (1) to the first position.

7. The quick connection mechanism for excavator accessories according to claim 6, characterized in that: The elastic reset member (17) comprises at least one cylindrical spring, and two ends of the cylindrical spring are respectively in contact with the slider (7) and the positioning block (16).

8. The quick connection mechanism for excavator accessories according to claim 7, characterized in that: A positioning rod (18) is protrudingly provided on the right side wall of the slider (7), the left end of the cylindrical spring is sleeved on the outside of the positioning rod (18), and a movable space for the slider (7) to move rightward is reserved between the right end of the positioning rod (18) and the positioning block (16).

9. The quick connection mechanism for excavator accessories according to claim 6, characterized in that: The driving assembly comprises a lever (19) and a lever fixing shaft (20), the two ends of the lever fixing shaft (20) are rotatably connected to the two side walls of the left end of the installation groove, the middle part of the lever (19) is connected to the outside of the lever fixing shaft (20), the middle part of the right end of the slider (7) is provided with a concave fitting groove (21), a positioning pin (22) is provided between the two side walls of the fitting groove (21), the lower end of the lever (19) can be movably inserted into the fitting groove (21), and the right side wall of the lower end of the lever (19) abuts against the positioning pin (22), the bottom of the left end of the installation groove is provided with a square positioning through hole (23), the bottom of the lever (19) extends downward to pass through the positioning through hole (23), and the left side wall of the lower end of the lever (19) abuts against the left side wall of the positioning through hole (23).

10. The quick connection mechanism for excavator accessories according to claim 9, characterized in that: The right side wall of the lower end of the lever (19) is an arc-shaped surface (24), and the right side of the bottom of the lever (19) is provided with an arc-shaped positioning groove (25) for engaging with the positioning pin (22).

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