Rotary connecting joint for pavement operation

Abstract

The utility model discloses a rotary connector for pavement operation, and belongs to the technical field of excavator accessories. Which comprises an upper connecting seat (1) and a lower connecting seat (9), and is characterized in that a fixed seat (5) and a rotating seat (6) which rotate relative to each other are arranged, the upper connecting seat (1) is fixed with the fixed seat (5), and the lower connecting seat (9) is fixed with the rotating seat (6); an oil way conversion seat is coaxially fixed at the axis of the rotating seat (6), a plurality of oil ways which are communicated with one another are arranged in the oil way conversion seat, and outlets of the oil ways in the oil way conversion seat are led out from the side part of the rotating seat (6); the top of the oil way conversion seat is rotationally connected with an oil way access seat (3); and the oil way access seat (3) is connected with an external oil way and an inlet of an oil way in the oil way conversion seat. According to the rotary connector for road surface operation, connection between an external oil way and an oil port of the machine tool head is achieved through the oil way conversion base and the oil way connection base, and on the premise that oil way communication is guaranteed, oil way winding is avoided when the machine tool head rotates.

Description

Technical Field

[0001] The invention discloses a rotary connection joint for road operation, belonging to the technical field of excavator accessories. Background Art

[0002] Excavators and loaders are currently common road operation vehicles. For example, an excavator is provided with tracks, a rotatable base is provided above the tracks, a cab is provided on the base, and a boom is provided on the side of the cab. The boom can be bent and other actions through the hydraulic system inside the excavator. To facilitate construction, a detachable tool head is generally provided at the end of the boom, such as a bucket, a breaker hammer, a hydraulic shear, etc. The corresponding action parts in the tool head are driven by the hydraulic system inside the excavator.

[0003] In an excavator, since only the arm itself can rotate with the base, there are many inconveniences during work. In order to improve work efficiency, some rotatable conversion joints have appeared on the market, such as: the technical solution disclosed by the Chinese utility model patent with application number 201520371622.5, application date June 2, 2015, and patent name "Excavator Quick-Change Joint"; the technical solution disclosed by the Chinese utility model patent with application number 202120649821.3, application date March 30, 2021, and patent name "A Rotary Quick-Change Joint for Excavators"; the technical solution disclosed by the Chinese utility model patent with application number 202322042853.9, application date August 1, 2023, and patent name "A Quick-Change Joint for Excavator Attachments".

[0004] In the above technical solution, the tool head is connected to the boom through a conversion joint, and the conversion joint itself can rotate, so the tool head itself can rotate relative to the boom, which can improve construction efficiency in some applicable occasions. However, the rotatable conversion joint including the above technical solution is found to have the following problems when in use: since most tool heads need to use hydraulic power as power when working, and the transmission of hydraulic pressure is generally achieved through hydraulic pipe connection, some tool heads even need to connect multiple hydraulic pipes at the same time. Therefore, when working, multiple hydraulic pipes often get entangled at the conversion joint. When the rotation angle of the conversion joint is too large, the entanglement of the oil pipes poses certain safety hazards and may cause damage to the hydraulic system of the excavator itself. Utility Model Content

[0005] The technical problem to be solved by the utility model is: to overcome the deficiencies of the prior art and to provide a rotary connecting joint for road operations which realizes connection between an external oil circuit and an oil port of a tool head through an oil circuit conversion seat and an oil circuit access seat, and which avoids oil circuit entanglement when the tool head rotates while ensuring the oil circuit is connected.

[0006] The technical solution adopted by the utility model to solve its technical problems is: the rotary connecting joint for road operation includes an upper connecting seat and a lower connecting seat that rotate relatively, and is characterized in that: a fixed seat and a rotating seat that rotate with each other are provided, the upper connecting seat is fixed on the upper surface of the fixed seat, and the lower connecting seat is fixed on the lower surface of the rotating seat; an oil circuit conversion seat is coaxially fixed at the axis of the rotating seat, a plurality of oil circuits that are interconnected are provided in the oil circuit conversion seat, and the outlet of the oil circuit in the oil circuit conversion seat is led out from the side of the rotating seat; an oil circuit access seat is rotatably connected to the top of the oil circuit conversion seat, and the oil circuit access seat is connected to the external oil circuit and the inlet of the oil circuit in the oil circuit conversion seat.

[0007] Preferably, the oil circuit conversion seat includes a coaxially arranged oil outlet seat and an oil inlet seat, the inlet of the oil circuit in the oil circuit conversion seat is an oil inlet port arranged on the surface of the oil inlet seat, and the outlet of the oil circuit in the oil circuit conversion seat is an oil outlet port arranged on the surface of the oil outlet seat.

[0008] Preferably, the oil circuit access seat is rotatably mounted on the outside of the oil inlet seat.

[0009] Preferably, an oil groove corresponding to the oil inlet is opened on the inner wall of the oil circuit access seat, and the oil groove is connected to the corresponding oil inlet. An opening corresponding to the oil groove is also provided on the surface of the oil circuit access seat, and the opening passes through the oil circuit access seat and is connected to the corresponding oil groove, and the opening is connected to the corresponding external oil circuit.

[0010] Preferably, the inner wall of the oil circuit access seat is in contact with the outer wall of the oil inlet seat, and the upper and lower ports of the oil circuit access seat are respectively sealed with the oil inlet seat.

[0011] Preferably, a receiving opening is provided at the fixing position of the upper connecting seat and the fixing seat, and the oil circuit access seat is located in the receiving opening.

[0012] Preferably, a worm box is provided on one side of the fixed seat, a drive motor and a worm coaxially fixed with the drive motor are provided in the worm box, and the worm wheel on the top of the rotating seat enters the interior of the fixed seat and meshes with the worm in the worm box.

[0013] Preferably, a fixed claw and a movable claw are provided at the bottom of the lower connecting seat, the movable claw is hinged in the lower connecting seat, and the movable claw swings under the drive of the oil cylinder in the lower connecting seat.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] In the rotary connection joint for road operation, the connection between the external oil circuit and the oil port of the tool head is realized through the oil circuit conversion seat and the oil circuit access seat. Under the premise of ensuring the connectivity of the oil circuit, the entanglement of the oil circuit when the tool head rotates is avoided, eliminating safety hazards.

[0016] In the rotary connection joint for road operation, the mutual rotation of the fixed seat and the rotating seat is achieved through a worm gear transmission mechanism, which has a deceleration effect and realizes self-locking to prevent the tool head from rotating when working. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Front view of a swivel connection joint for road work.

[0018] Figure 2 Front view of the hydraulic oil conversion seat of the rotary connection joint for road operations.

[0019] Figure 3 for Figure 2 Left view of .

[0020] Among them: 1, upper connecting seat 2, worm gear box 3, oil circuit access seat 4, accommodating port 5, fixed seat 6, rotating seat 7, oil pipe connecting part 8, movable claw 9, lower connecting seat 10, fixed claw 11, oil inlet 12, oil inlet seat 13, oil outlet 14, oil outlet seat 15, sealing plate. DETAILED DESCRIPTION

[0021] Figures 1 to 3 It is the best embodiment of the utility model, and the following Figures 1 to 3 The utility model is further described.

[0022] like Figure 1 As shown, a rotary connection joint for road operation (hereinafter referred to as a conversion joint) includes an upper connection seat 1 and a lower connection seat 9. The upper connection seat 1 is used to connect with the boom of the excavator, and the lower connection seat 9 is used to connect with the tool head. To improve applicability, the structure and connection method of the upper connection seat 1 and the lower connection seat 9 are all common knowledge in the art.

[0023] Take the following connecting seat 9 as an example: a fixed claw 10 and a movable claw 8 are provided at the bottom of the lower connecting seat 9, wherein the movable claw 8 is hinged in the lower connecting seat 9, and the movable claw 8 swings under the drive of the oil cylinder in the lower connecting seat 9. A connecting shaft corresponding to the fixed claw 10 and the movable claw 8 is provided at the top of the tool head, and the piston rod of the oil cylinder that drives the movable claw 8 to move is reset, driving the movable claw 8 to approach the fixed claw 10. After the fixed claw 10 and the movable claw 8 are installed in the tool head, the piston rod of the oil cylinder that drives the movable claw 8 to move is output, and the fixed claw 10 and the movable claw 8 are respectively clamped at the connecting shaft at the inner end of the tool head, so as to realize the fixation of the lower connecting seat 9 and the tool head.

[0024] A fixed seat 5 and a rotating seat 6 are provided in the conversion joint, wherein the upper connecting seat 1 is fixed on the top of the fixed seat 5, and the lower connecting seat 9 is fixed on the bottom of the rotating seat 6. The fixed seat 5 and the rotating seat 6 are coaxially arranged and rotatably connected. A worm box 2 is provided on one side of the fixed seat 5, and a driving motor and a worm coaxially fixed with the driving motor are provided in the worm box 2. The rotating seat 6 enters the fixed seat 5 from the bottom of the fixed seat 5, and a worm wheel is provided on the top of the rotating seat 6. After the rotating seat 6 is installed in the fixed seat 5, the worm wheel on the top of the rotating seat 6 meshes with the worm in the worm box 2. When the driving motor in the worm box 2 rotates, the rotation of the rotating seat 6 is realized through the worm gear transmission mechanism, and the rotation between the upper connecting seat 1 and the lower connecting seat 9 is further realized. In addition, the transmission is realized through the worm gear transmission mechanism, which has a deceleration effect, and realizes self-locking to prevent the tool head from rotating when working.

[0025] A transparent receiving port 4 is provided in the middle of the connection between the upper connector 1 and the fixed seat 5, an oil circuit access seat 3 is provided in the receiving port 4, an oil circuit conversion seat is provided at the axis of the fixed seat 5 and the rotating seat 6, the bottom of the oil circuit conversion seat is coaxially fixed with the rotating seat 6, the top of the oil circuit conversion seat is led out from the receiving port 4, the oil circuit access seat 3 is sleeved on the outer ring of the top of the oil circuit conversion seat, and rotates relative to the oil circuit conversion seat.

[0026] like Figure 2~3 As shown, the oil circuit conversion seat includes a coaxially arranged oil outlet seat 14 and an oil inlet seat 12, wherein the oil outlet seat 14 is coaxially fixed with the rotating seat 16. A plurality of oil inlets 11 are arranged on the surface of the oil inlet seat 12, and the oil inlets 11 are at different heights. The surface of the oil outlet seat 14 is also provided with oil outlets 13 corresponding to the oil inlets 11 one by one. The oil circuit conversion seat is provided with an inner cavity, and the oil inlet 11 and the corresponding engine oil port 11 are connected in the inner cavity of the oil circuit conversion seat. An opening is also provided on the surface of the oil outlet seat 14, which is connected to the inner cavity of the oil circuit conversion seat through the opening, and the opening on the surface of the oil outlet seat 14 is closed by a sealing plate 15.

[0027] The oil circuit access seat 3 is mounted on the outside of the oil inlet seat 12, and the inner wall of the oil circuit access seat 3 fits with the outer wall of the oil inlet seat 12. The upper and lower ends of the oil circuit access seat 3 are sealed with the oil inlet seat 12 through sealing rings. An opening corresponding to the oil groove is provided on the inner wall of the oil circuit access seat 3, and the opening radially penetrates the shell wall of the oil circuit access seat 3 and communicates with the corresponding oil groove. At the same time, the oil groove also corresponds to the oil inlet port 11 on the surface of the oil inlet seat 12. After the oil circuit access seat 3 is mounted on the surface of the oil inlet seat 12, the oil groove communicates with the corresponding oil inlet port 11.

[0028] The above structure realizes the connection between the oil inlet 11 and the opening on the surface of the oil circuit access seat 3, and when the oil circuit access seat 3 and the oil inlet seat 12 rotate relative to each other, the opening on the surface of the oil circuit access seat 3 is always connected to the oil inlet 11. The outer port of the opening on the surface of the oil circuit access seat 3 is connected to the hydraulic system of the excavator through a pipeline (a solenoid valve is installed in the pipeline), thereby realizing the connection between the oil circuit of the hydraulic system of the excavator and the oil outlet 13. An oil pipe connection part 7 is also provided on the side of the surface of the rotating seat 6, and all the oil outlets 13 on the surface of the oil outlet seat 14 are simultaneously collected at the oil pipe connection part 7 inside the rotating seat 6, and the oil ports corresponding to the oil pipe connection part 7 are connected to the oil circuit interface of the tool head through a pipeline.

[0029] The specific working process and working principle are as follows:

[0030] The mechanical connection between the excavator arm and the implement head is realized through the upper connecting seat 1 and the lower connecting seat 9, and the interface of the hydraulic system in the excavator is connected to the opening on the surface of the oil circuit access seat 3 through a pipeline. After the implement head and the lower connecting seat 9 are installed, the oil circuit interface of the implement head is connected to the corresponding interface at the oil pipe connecting part 7 through an oil pipe.

[0031] When the excavator is working, the corresponding oil circuits are connected by controlling the solenoid valves on different pipelines, and the hydraulic oil is sent to the corresponding driving components in the tool head to complete the corresponding actions. Even if the rotating seat 6 and the fixed seat 5 rotate, the rotation between the oil inlet seat 12 and the oil circuit access seat 3 is completed, and the hydraulic oil delivery channel will not be affected, and the oil pipe will not be entangled.

[0032] The above is only the preferred embodiment of the utility model, and does not limit the utility model in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the utility model without departing from the technical solution of the utility model still belongs to the protection scope of the technical solution of the utility model.

Claims

1. A rotary connection joint for road operation, comprising an upper connection seat (1) and a lower connection seat (9) that rotate relative to each other, characterized in that: A fixed seat (5) and a rotating seat (6) are provided which rotate with each other, an upper connecting seat (1) is fixed on the upper surface of the fixed seat (5), and a lower connecting seat (9) is fixed on the lower surface of the rotating seat (6); an oil circuit conversion seat is coaxially fixed at the axis of the rotating seat (6), a plurality of oil circuits which are interconnected are provided in the oil circuit conversion seat, and the outlet of the oil circuit in the oil circuit conversion seat is led out from the side of the rotating seat (6); an oil circuit access seat (3) is rotatably connected to the top of the oil circuit conversion seat, and the oil circuit access seat (3) is connected to the external oil circuit and the inlet of the oil circuit in the oil circuit conversion seat.

2. The rotary connection joint for road work according to claim 1, characterized in that: The oil circuit conversion seat comprises an oil outlet seat (14) and an oil inlet seat (12) which are coaxially arranged, the inlet of the oil circuit in the oil circuit conversion seat is an oil inlet port (11) arranged on the surface of the oil inlet seat (12), and the outlet of the oil circuit in the oil circuit conversion seat is an oil outlet port (13) arranged on the surface of the oil outlet seat (14).

3. The rotary connection joint for road work according to claim 2, characterized in that: The oil passage access seat (3) is rotatably mounted on the outside of the oil inlet seat (12).

4. The rotary connection joint for road work according to claim 2, characterized in that: An oil groove corresponding to the oil inlet (11) is provided on the inner wall of the oil circuit access seat (3), and the oil groove is communicated with the corresponding oil inlet (11). An opening corresponding to the oil groove is also provided on the surface of the oil circuit access seat (3), and the opening passes through the oil circuit access seat (3) and is communicated with the corresponding oil groove, and the opening is connected to the corresponding external oil circuit.

5. The rotary connection joint for road work according to claim 3, characterized in that: The inner wall of the oil passage access seat (3) is in contact with the outer wall of the oil inlet seat (12), and the upper and lower ports of the oil passage access seat (3) are respectively sealed with the oil inlet seat (12).

6. The rotary connection joint for road work according to claim 1, characterized in that: An accommodating opening (4) is provided at the fixing point between the upper connecting seat (1) and the fixing seat (5), and the oil circuit access seat (3) is located in the accommodating opening (4).

7. The rotary connection joint for road work according to claim 1, characterized in that: A worm box (2) is arranged on one side of the fixed seat (5), a drive motor and a worm coaxially fixed to the drive motor are arranged in the worm box (2), and a worm wheel on the top of the rotating seat (6) enters the interior of the fixed seat (5) and meshes with the worm in the worm box (2).

8. The rotary connection joint for road work according to claim 1, characterized in that: A fixed clamping claw (10) and a movable clamping claw (8) are arranged at the bottom of the lower connecting seat (9); the movable clamping claw (8) is hinged in the lower connecting seat (9); and the movable clamping claw (8) swings under the drive of an oil cylinder in the lower connecting seat (9).

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