An oil passage structure of a machining jig

Abstract

The utility model relates to oil line structure technical field, proposes an oil line structure of processing fixture, including frame body, multiaxis mechanical arm, oil distributor, oil line joint and connecting pipe, be equipped with first oil inlet and first oil outlet on the oil distributor, the oil line joint includes fixed cylinder and inner core, the fixed cylinder fixedly arranged on multiaxis mechanical arm, the second oil inlet is set up on the circumferential side of fixed cylinder, the inner core rotation is arranged in fixed cylinder, the second oil outlet is set up on the inner core, the inner core with fixed cylinder enclose and form oil supply cavity, oil supply cavity with second oil inlet with second oil outlet intercommunication, the utility model discloses through setting up oil supply cavity between fixed cylinder and inner core, let oil supply cavity with second oil inlet and second oil outlet intercommunication, when the relative rotation of inner core and fixed cylinder occurs, can let second oil inlet always with second oil outlet intercommunication, thereby guaranteed the normal operation of oil line structure.

Description

Technical Field

[0001] This utility model relates to the field of oil circuit structure technology, and in particular to an oil circuit structure for a machining fixture. Background Technology

[0002] In modern manufacturing, multi-axis robotic arms are widely used in various processing scenarios due to their high flexibility and precise motion control capabilities. Multi-axis robotic arms are usually used in conjunction with fixtures. They can move in multiple dimensions, thereby driving the fixtures to clamp and fix the workpiece, and realizing the movement and transportation of the workpiece.

[0003] The grippers on multi-axis robotic arms are usually driven by a hydraulic system. Hydraulic oil is delivered to the various hydraulic actuators of the end gripper of the multi-axis robotic arm through an oil circuit structure, thereby driving the gripper to clamp or release the workpiece.

[0004] For example, the utility model disclosed in CN217019545U discloses a hydraulic oil circuit structure for a fixture on a five-axis CNC rotary table. It is equipped with an oil distributor and a sealing oil ring. By utilizing the cooperation of the oil inlet interface, oil return interface, oil inlet channel and oil return channel, it solves the technical problems such as the complexity of the hydraulic oil circuit structure of the fixture on the five-axis CNC rotary table.

[0005] In a multi-axis robotic arm, each arm needs to rotate frequently, and the gripper at the end of the multi-axis robotic arm usually needs to maintain a certain angle. Therefore, the oil pipeline is prone to bend, which affects the normal operation of the gripper. Utility Model Content

[0006] In view of this, the present invention proposes an oil circuit structure for a machining fixture, which can prevent damage to the oil circuit structure when the inner core and the fixed cylinder rotate, thus ensuring the normal operation of the oil circuit structure.

[0007] The technical solution of this utility model is achieved as follows: This utility model provides an oil circuit structure for a machining fixture, including a frame, a multi-axis robotic arm, an oil distributor, an oil circuit connector, and a connecting pipe, wherein, The multi-axis robotic arm is rotatably mounted on the frame. The oil separator is fixedly mounted on the frame. The oil separator is provided with a first oil inlet and a first oil outlet, and the first oil inlet and the first oil outlet are connected. The oil circuit connector includes a fixed cylinder and an inner core. The fixed cylinder is fixedly mounted on the multi-axis robotic arm, and a second oil inlet is provided on the periphery of the fixed cylinder. The inner core is rotatably mounted inside the fixed cylinder, and a second oil outlet is provided on the inner core. The inner core and the fixed cylinder enclose each other to form an oil supply chamber, and the oil supply chamber is connected to the second oil inlet and the second oil outlet. The connecting pipe is disposed between the first oil outlet and the second oil inlet.

[0008] Based on the above technical solutions, preferably, there are two of each of the multi-axis robotic arms and the oil circuit connectors, with one multi-axis robotic arm and one oil circuit connector corresponding to each other, and the two multi-axis robotic arms are arranged opposite each other about the center line of the frame.

[0009] More preferably, there are two sets of the first oil inlet and the first oil outlet, with each set corresponding to the first oil outlet.

[0010] More preferably, each group of first oil inlets and each group of first oil outlets are provided with multiple inlets; The second oil inlet, the second oil outlet, and the oil supply chamber are all provided in multiple ways, and each one corresponds to the first oil outlet.

[0011] More preferably, the second oil outlet includes a connecting section, a turning section, and an output section. The connecting section, the turning section, and the output section are all formed inside the inner core. One end of the connecting section is connected to the oil supply chamber, and the other end extends through to the side wall of the inner core. One end of the turning section is connected to the connecting section, and the other end extends through to the side wall of the inner core. One end of the output section is connected to the turning section, and the other end extends through to the side wall of the inner core.

[0012] More preferably, the oil supply chamber has a ring-shaped structure, and the plurality of oil supply chambers are arranged in parallel and spaced apart.

[0013] Based on the above technical solutions, preferably, the connecting pipe includes a pipe body, a first connector, and a second connector, wherein, The first connector is fixedly disposed at the end of the tube body and connected thereto; The second connector is fixedly installed inside the first oil outlet or the second oil inlet, and is detachably and fixedly connected to the first connector.

[0014] More preferably, the first joint includes a base and a nut, wherein, The base is fixedly disposed at the end of the tube and is connected to its interior; The nut is rotatably mounted on the base and is connected to the second connector via a threaded engagement.

[0015] More preferably, the end of the base away from the tube body is pointed; The second connector has a tapered groove at one end, and the base is abutted in the tapered groove at the end away from the tube body.

[0016] More preferably, the multiple output segments on the same inner core are arranged in a circular pattern.

[0017] The oil circuit structure of the machining fixture of this utility model has the following advantages over the prior art: (1) By setting an oil supply chamber between the fixed cylinder and the inner core, the oil supply chamber is connected to the second oil inlet and the second oil outlet. When the inner core and the fixed cylinder rotate relative to each other, the second oil inlet can always be connected to the second oil outlet, thereby ensuring the normal operation of the oil circuit structure.

[0018] (2) By setting a conical groove on the second connector, the end of the base is set to be conical. The connection sealing of the connecting pipe can be improved by the contact between the base and the conical groove. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a perspective view of the oil circuit structure of a machining fixture according to the present invention.

[0021] Figure 2 This is a perspective view of the oil distributor and oil circuit connector in the oil circuit structure of a machining fixture according to this utility model.

[0022] Figure 3 This is a perspective view of the oil separator in the oil circuit structure of a machining fixture according to this utility model.

[0023] Figure 4 This is a perspective view of the oil circuit connector in the oil circuit structure of a machining fixture according to the present invention.

[0024] Figure 5 This is a transverse sectional view of the oil circuit connector in the oil circuit structure of a machining fixture according to the present invention.

[0025] Figure 6 This is a longitudinal sectional view of the oil circuit connector in the oil circuit structure of a machining fixture according to this utility model.

[0026] Figure 7 This is a partial cross-sectional view of the connecting pipe in the oil circuit structure of a machining fixture according to this utility model.

[0027] The components are as follows: 1. Frame; 2. Multi-axis robotic arm; 3. Oil distributor; 301. First oil inlet; 302. First oil outlet; 4. Oil circuit connector; 41. Fixed cylinder; 42. Inner core; 401. Second oil inlet; 402. Second oil outlet; 403. Oil supply chamber; 4021. Connecting section; 4022. Turning section; 4023. Output section; 5. Connecting pipe; 51. Pipe body; 52. First connector; 53. Second connector; 521. Base; 522. Nut; 501. Conical groove. Detailed Implementation

[0028] The technical solutions of this utility model will be clearly and completely described below with reference to specific embodiments. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0029] The present invention discloses a hydraulic circuit structure for a machining fixture, comprising a frame 1, a multi-axis robotic arm 2, an oil distributor 3, an oil circuit connector 4, and a connecting pipe 5, for connecting the hydraulic oil tank of the hydraulic system to the fixture on the multi-axis robotic arm 2 to provide hydraulic drive for the fixture.

[0030] like Figure 1 and Figure 2 As shown, the multi-axis robotic arm 2 is rotatably mounted on the frame 1. The multi-axis robotic arm 2 consists of multiple rotatable arms. The rotation of the multiple arms drives the end of the multi-axis robotic arm 2 away from the frame 1 to move to the desired position.

[0031] The oil separator 3 is fixedly mounted on the frame 1, the oil line connector 4 is located at the end of the multi-axis robotic arm 2, and the clamp is fixedly mounted on the oil line connector 4, so that the rotation of the arm can drive the clamp to move to the required position.

[0032] The oil distributor 3 is provided with a first oil inlet 301 and a first oil outlet 302, which are connected to each other. The oil circuit connector 4 is provided with a second oil inlet 401 and a second oil outlet 402, which are connected to each other. The first oil inlet 301 is connected to the hydraulic oil tank of the hydraulic system, and the second oil outlet 402 is connected to the execution unit of the fixture. The connecting pipe 5 is connected between the first oil outlet 302 and the second oil inlet 401, so that the hydraulic oil in the hydraulic oil tank can be delivered to the execution unit of the fixture.

[0033] like Figure 2 and Figure 4As shown, the oil circuit connector 4 includes a fixed cylinder 41 and an inner core 42. The fixed cylinder 41 is fixedly installed at the end of the multi-axis robotic arm 2. The second oil inlet 401 is opened on the periphery of the fixed cylinder 41. The inner core 42 is rotatably installed inside the fixed cylinder 41. The second oil outlet 402 is opened on the inner core 42. The inner core 42 and the fixed cylinder 41 enclose an oil supply chamber 403. The oil supply chamber 403 is connected to the second oil inlet 401 and the second oil outlet 402. The clamp is fixed on the inner core 42. The multi-axis robotic arm 2 can drive the clamp to move. The clamp can rotate relative to the multi-axis robotic arm 2, so that the relative angle between the clamp and other components does not change.

[0034] When the clamp rotates relative to the multi-axis robotic arm 2, the inner core 42 rotates relative to the fixed cylinder 41. During this process, the second oil inlet 401 and the second oil outlet 402 are always connected to the oil supply chamber 403, so that there will be no problems such as oil circuit blockage, and the clamp can be supplied with oil normally, ensuring the normal use of the clamp.

[0035] To improve the efficiency of workpiece movement, such as Figure 1 and Figure 2 As shown, two multi-axis robotic arms 2 and two oil circuit connectors 4 are set up, with one multi-axis robotic arm 2 corresponding to one oil circuit connector 4, and the two multi-axis robotic arms 2 are set relative to each other about the center line of the frame 1 to realize dual-station operation of the workpiece.

[0036] In order to enable the grippers on the two multi-axis robotic arms 2 to work independently, the first oil inlet 301 and the first oil outlet 302 are set into two sets, with the first oil inlet 301 and the first oil outlet 302 corresponding one-to-one, and each set of first oil outlet 302 is connected to an oil circuit connector 4.

[0037] In actual processing, each multi-axis robotic arm 2 may need to be equipped with multiple grippers, and the grippers may also be composite grippers. Therefore, each multi-axis robotic arm 2 needs to be equipped with multiple hydraulic passages. Specifically, such as... Figure 3 and Figure 4 As shown, each group of first oil inlets 301 and each group of first oil outlets 302 are provided with multiple first oil inlets 301, multiple second oil inlets 401, multiple second oil outlets 402 and multiple oil supply chambers 403. The first oil inlets 301, the first oil outlets 302, the second oil inlets 401, the oil supply chambers 403 and the second oil outlets 402 correspond one-to-one, and the corresponding first oil inlets 301, the first oil outlets 302, the second oil inlets 401, the oil supply chambers 403 and the second oil outlets 402 form an oil passage.

[0038] like Figure 5 and Figure 6 As shown, the oil supply chamber 403 has a ring-shaped structure, and multiple oil supply chambers 403 are arranged in parallel and at intervals, thereby improving the stability of hydraulic oil delivery.

[0039] like Figure 6 As shown, the second oil outlet 402 includes a connecting section 4021, a turning section 4022, and an output section 4023. The connecting section 4021, the turning section 4022, and the output section 4023 are all located inside the inner core 42. One end of the connecting section 4021 is connected to the oil supply chamber 403, and the other end extends through to the side wall of the inner core 42. One end of the turning section 4022 is connected to the connecting section 4021, and the other end extends through to the side wall of the inner core 42. One end of the output section 4023 is connected to the turning section 4022, and the other end extends through to the side wall of the inner core 42. By allowing the connecting section 4021 and the turning section 4022 to extend through to the side wall of the inner core 42, it is convenient to maintain the inner wall of the second oil outlet 402. During the use of this device, plugs are required to seal the end of the connecting section 4021 away from the oil supply chamber 403 and the end of the turning section 4022 away from the connecting section 4021, so that the hydraulic oil entering the oil supply chamber 403 can flow smoothly into the output section 4023.

[0040] like Figure 4 As shown, multiple output segments 4023 on the same inner core 42 are arranged circumferentially around the axis of the inner core 42, thereby improving the installation convenience of the second oil outlet 402.

[0041] The connecting pipe 5 includes a pipe body 51, a first connector 52, and a second connector 53, as follows: Figure 7 As shown, the first connector 52 includes a base 521 and a nut 522. The base 521 is fixedly installed at the end of the pipe body 51 and is connected to the interior of the pipe body 51. The nut 522 is rotatably installed on the base 521. The second connector 53 is fixedly installed in the first oil outlet 302 or the second oil inlet 401. The nut 522 is connected to the second connector 53 by threaded engagement. The nut 522 and the second connector 53 are detachably fixedly connected, which can realize the connection between the pipe body 51 and the oil distributor 3 and the oil circuit connector 4, and can also facilitate the disassembly and maintenance of the pipe body 51, thus improving the maintenance convenience of this oil circuit structure.

[0042] like Figure 7 As shown, the end of the base 521 away from the pipe body 51 is pointed, and the end of the second connector 53 is provided with a tapered groove 501. When the nut 522 is connected to the second connector 53, the end of the base 521 away from the pipe body 51 abuts against the inner wall of the tapered groove 501, which greatly improves the connection sealing between the two and ensures the safety of hydraulic oil delivery.

[0043] The working principle of the oil circuit structure of the machining fixture of this utility model is as follows: After the clamp is fixed on the inner core 42, the clamp's execution unit is connected to the second oil outlet 402, and the hydraulic oil tank is connected to the first oil inlet 301. The hydraulic oil is sequentially transported to the clamp's execution unit through the first oil inlet 301, the first oil outlet 302, the connecting pipe 5, the second oil inlet 401, the oil supply chamber 403, and the second oil outlet 402 to control the clamp to hold or release the workpiece. During this period, when the clamp rotates relative to the multi-axis robotic arm 2, the rotational cooperation between the inner core 42 and the fixed cylinder 41, as well as the connection between the oil supply chamber 403 and the second oil inlet 401 and the second oil outlet 402, can keep the oil circuit connected and avoid oil interruption.

[0044] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An oil circuit structure for a machining fixture, characterized in that: It includes a frame (1), a multi-axis robotic arm (2), an oil distributor (3), an oil line connector (4), and a connecting pipe (5), among which, The multi-axis robotic arm (2) is rotatably mounted on the frame (1); The oil separator (3) is fixedly installed on the frame (1). The oil separator (3) is provided with a first oil inlet (301) and a first oil outlet (302), and the first oil inlet (301) and the first oil outlet (302) are connected. The oil circuit connector (4) includes a fixed cylinder (41) and an inner core (42). The fixed cylinder (41) is fixedly mounted on the multi-axis robotic arm (2). A second oil inlet (401) is provided on the periphery of the fixed cylinder (41). The inner core (42) is rotatably mounted inside the fixed cylinder (41). A second oil outlet (402) is provided on the inner core (42). The inner core (42) and the fixed cylinder (41) enclose each other to form an oil supply chamber (403). The oil supply chamber (403) is connected to the second oil inlet (401) and the second oil outlet (402). The connecting pipe (5) is connected between the first oil outlet (302) and the second oil inlet (401).

2. The oil circuit structure of a machining fixture as described in claim 1, characterized in that: Two of each of the multi-axis robotic arms (2) and the oil line connectors (4) are provided. The multi-axis robotic arms (2) and the oil line connectors (4) correspond one-to-one, and the two multi-axis robotic arms (2) are arranged opposite each other about the center line of the frame (1).

3. The oil circuit structure of a machining fixture as described in claim 2, characterized in that: The first oil inlet (301) and the first oil outlet (302) are each provided in two sets, with the first oil inlet (301) and the first oil outlet (302) corresponding one-to-one.

4. The oil circuit structure of a machining fixture as described in claim 3, characterized in that: Each group of first oil inlets (301) and each group of first oil outlets (302) are provided with multiple outlets; The second oil inlet (401), the second oil outlet (402) and the oil supply chamber (403) are each provided in multiple ways, and each corresponds to the first oil outlet (302) one by one.

5. The oil circuit structure of a machining fixture as described in claim 4, characterized in that: The second oil outlet (402) includes a connecting section (4021), a turning section (4022), and an output section (4023). The connecting section (4021), the turning section (4022), and the output section (4023) are all located inside the inner core (42). One end of the connecting section (4021) is connected to the oil supply chamber (403), and the other end extends through to the side wall of the inner core (42). One end of the turning section (4022) is connected to the connecting section (4021), and the other end extends through to the side wall of the inner core (42). One end of the output section (4023) is connected to the turning section (4022), and the other end extends through to the side wall of the inner core (42).

6. The oil circuit structure of a machining fixture as described in claim 4, characterized in that: The oil supply chamber (403) has a ring structure, and multiple oil supply chambers (403) are arranged in parallel and at intervals.

7. The oil circuit structure of a machining fixture as described in claim 1, characterized in that: The connecting pipe (5) includes a pipe body (51), a first connector (52), and a second connector (53), wherein, The first connector (52) is fixedly disposed at the end of the tube body (51) and connected thereto; The second connector (53) is fixedly installed inside the first oil outlet (302) or the second oil inlet (401) and is detachably fixedly connected to the first connector (52).

8. The oil circuit structure of a machining fixture as described in claim 7, characterized in that: The first connector (52) includes a base (521) and a nut (522), wherein, The base (521) is fixedly disposed at the end of the tube (51) and is connected to its interior; The nut (522) is rotatably mounted on the base (521) and is connected to the second connector (53) by a threaded engagement.

9. The oil circuit structure of a machining fixture as described in claim 8, characterized in that: The end of the base (521) away from the tube body (51) is pointed; The second connector (53) has a tapered groove (501) at its end, and the base (521) is abutted in the tapered groove (501) at one end away from the tube body (51).

10. The oil circuit structure of a machining fixture as described in claim 5, characterized in that: The multiple output segments (4023) on the same inner core (42) are arranged in a circular manner.

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