Hydraulic buffer

Abstract

The present invention is applicable to the field of CNC machine tools and provides an oil pressure buffer, comprising a rotary cylinder seat with an internal oil chamber and a rotary piston rotatably mounted in the rotary cylinder seat; the rotary piston is provided with a piston block for sensing oil pressure to drive the rotary piston to rotate; a limit block is fixedly mounted inside the oil chamber to limit the rotation angle of the piston block; a main oil regulating port and a slave oil regulating port are respectively provided on both sides of the limit block; the main oil regulating port is connected to the oil pump through the main oil regulating channel; the slave oil regulating port is connected to the oil tank through the slave oil regulating channel; the main oil regulating channel is provided with a buffer port connected to a predetermined position of the oil chamber. In this way, the present invention can enter a buffering stage during the rotation and reset process of the tool taking clamp after taking the tool, thereby eliminating the "tool shaking phenomenon". In addition, a locking assembly for rotationally locking the rotary piston is also provided inside the device, thereby improving the stability of the rotary piston on the tool taking clamp and optimizing the tool docking effect between the tool taking clamp and the tool of the subsequent equipment.

Description

Technical Field

[0001] The present invention relates to the field of numerically controlled machine tools, and in particular to an oil pressure buffer. Background Art

[0002] Existing CNC machining equipment all adopts integrated control. For example, the tools of CNC machining machines are stored in a special CNC tool magazine, and a special tool changing mechanism is used to change the tools of the machining equipment.

[0003] See also Figure 1 The existing CNC tool magazine includes a rotary tool magazine 001 and a tool taking mechanism, and the tool taking mechanism includes a rotary structure 003 and a tool taking clamp 002 installed on the rotary structure 003. The rotary structure 003 is installed on a moving mechanism (not shown in the figure). When taking a tool, the moving mechanism drives the tool taking clamp 002 to align with the tool to be taken and clamp it. Then, the moving mechanism drives the tool taking clamp 002 to move ( Figure 1 As shown, the moving mechanism drives the rotary structure 003 and the tool taking clamp 002 to move from the left end position to the right end position). During the movement process, the rotary structure 003 will drive the tool taking clamp 002 to turn, which facilitates the docking of the tool taking clamp 002 with subsequent equipment and realizes the transfer of the tool.

[0004] During the above working process, after the tool taking clamp 002 finishes taking the tool, the rotating structure 003 in the rotating state often lacks buffering between parts at the end of rotation, causing the tool to shake violently inside the tool taking clamp 002, referred to as the "tool shaking phenomenon". This phenomenon will cause the tool to collide with the inner wall of the clamp 002, causing damage to the tool; on the other hand, it will affect the docking of the tool taking clamp 002 with subsequent equipment.

[0005] In summary, the existing technology has obvious inconveniences and defects in actual use, so it is necessary to improve it. Summary of the Invention

[0006] In response to the above-mentioned defects, the purpose of the present invention is to provide an oil pressure buffer, which can enter the buffering stage during the rotation and resetting process of the tool taking clamp after taking the tool, so as to eliminate the "tool shaking phenomenon". In addition, the interior of the device is also provided with a locking component for rotating the rotating piston, thereby improving the stability of the rotating piston on the tool taking clamp and optimizing the docking effect between the tool taking clamp and the tool of subsequent equipment.

[0007] In order to achieve the above-mentioned purpose, the present invention provides an oil pressure buffer, comprising a rotary cylinder seat with an oil chamber therein and a rotating piston rotatably installed in the rotary cylinder seat; the rotating piston is provided with a piston block for sensing oil pressure to drive the rotating piston to rotate; a limit block for limiting the rotation angle of the piston block is fixedly installed inside the oil chamber; a main oil regulating port and a slave oil regulating port are respectively provided on both sides of the limit block; the main oil regulating port is connected to the oil pump through the main oil regulating channel; the slave oil regulating port is connected to the oil tank through the slave oil regulating channel; the main oil regulating channel is provided with a buffer port connected to a predetermined position of the oil chamber.

[0008] According to the oil pressure buffer of the present invention, the position of the limit block and the rotary cylinder seat is locked by a locking member.

[0009] According to the oil pressure buffer of the present invention, a locking assembly for locking the position of the piston block is provided inside the oil chamber; when the side end of the limit block close to the main oil regulating port contacts the piston block, the locking assembly locks the position of the piston block.

[0010] According to the oil pressure buffer of the present invention, the locking assembly includes a slot provided on the piston block and a block cooperating with the slot; the block is a seesaw structure, which can be switched between a locked state and a lock cancellation state; one end of the block in the locked state protrudes outward and is stuck in the slot; the protruding end of the block in the lock cancellation state is retracted.

[0011] According to the oil pressure buffer of the present invention, the cavity wall of the oil cavity is provided with a receiving cavity for accommodating a card block; the card block is a flat plate structure; a predetermined position in the middle of the card block is hinged to the side wall of the receiving cavity; the piston block drives the card block into a locked state through a driving component; when the main oil regulating port is in the oil supply state, the card block is driven into a lock cancellation state through a reset component.

[0012] According to the oil pressure buffer of the present invention, the driving assembly includes a turntable rotatably installed at the bottom of the oil chamber, a protrusion provided on the turntable and cooperating with the piston block, and a movable tooth structure installed on the turntable and applying a pushing force to the blocking block; a turntable reset spring is provided between the bottom of the turntable and the rotary cylinder seat to drive the turntable to reset; the movable tooth structure includes a movable tooth accommodating bin provided on the outer edge of the turntable, movable teeth hinged in the movable tooth accommodating bin, and a support spring connecting the movable teeth and the bin wall of the movable tooth accommodating bin.

[0013] According to the hydraulic buffer of the present invention, the reset assembly is a reset oil cylinder arranged in the rotary cylinder seat; the reset oil cylinder includes an oil tank whose one end is connected to the main oil channel and a piston pad movably installed in the oil tank; the lower end of the oil tank is connected to the external atmospheric pressure through a through hole provided on the rotary cylinder seat; the piston pad is connected to the outer protruding end of the block through a connecting rope.

[0014] The present invention provides an oil pressure buffer, comprising a rotary cylinder seat with an internal oil chamber and a rotary piston rotatably installed in the rotary cylinder seat; the rotary piston is provided with a piston block for sensing oil pressure to drive the rotary piston to rotate; a limit block for limiting the rotation angle of the piston block is fixedly installed inside the oil chamber; a main oil regulating port and a slave oil regulating port are respectively provided on both sides of the limit block; the main oil regulating port is connected to the oil pump through the main oil regulating channel; the slave oil regulating port is connected to the oil tank through the slave oil regulating channel; the main oil regulating channel is provided with a buffer port connected to a predetermined position of the oil chamber. The present invention can enter a buffering stage during the rotation and reset process of the tool taking clamp after taking the tool, so as to eliminate the "tool shaking phenomenon", and a locking assembly for rotationally locking the rotary piston is also provided inside the device, thereby improving the stability of the rotary piston on the tool taking clamp and optimizing the tool docking effect between the tool taking clamp and the subsequent equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural diagram of the existing CNC tool magazine; Figure 2 It is a structural schematic diagram of the present invention; Figure 3 It is a working state diagram of the present invention; Figure 4 yes Figure 3 Another working state diagram of the present invention; Figure 5 This is the installation explosion view of the limit block; Figure 6 This is the installation cross-sectional view of the turntable; Figure 7 This is a structural diagram of the groove on the piston block;

[0016] Figure 8 yes Figure 7 Schematic diagram from another angle; Figure 9 This is the installation position diagram of the card block; Figure 10 This is a diagram of the position of the movable tooth structure on the turntable; Figure 11 It is a structural diagram of the movable tooth structure on the turntable; Figure 12 This is a state diagram of the card block in the lock cancellation state; Figure 13 This is a state diagram of the card block in the locked state; Figure 14 It is a structural diagram of the reset component; Figure 15 It is a structural diagram of the turntable return spring; in the figure, 001-rotary tool magazine, 002-tool clamp, 003-rotary structure, 1-rotary cylinder seat, 11-oil chamber, 111-accommodation chamber, 2-rotating piston, 21-piston block, 211-card slot, 212-embedded slot, 3-limiting block, 41-main oil regulating port, 42-main oil regulating channel, 43-slave oil regulating port, 44-slave oil regulating channel, 45-buffer port, 6-locking piece, 7-card block, 81-turntable, 82-bump, 83-movable tooth, 84-support spring, 85-turntable return spring, 91-oil tank, 92-piston pad, 93-connecting rope, 94-return spring. DETAILED DESCRIPTION

[0017] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0018] See also Figure 2 and Figure 3 The present invention provides an oil pressure buffer, which includes a rotary cylinder seat 1 with an oil chamber 11 and a rotary piston 2 rotatably mounted in the rotary cylinder seat 1, and a tool clamp 002 is mounted on the upper position of the rotary piston 2 ( Figure 1 As shown), when the rotary piston 2 rotates, it will further drive the tool clamp 002 to rotate; the rotary piston 2 is provided with a piston block 21 ( Figure 3 and Figure 7 The oil chamber 11 is fixedly mounted with a limit block 3 for limiting the rotation angle of the piston block 21, and the limit block 3 is locked in position with the rotary cylinder seat 1 by a locking member 6 ( Figure 5 As shown), in this example, the locking member 6 is a locking screw, which passes through the rotary cylinder seat 1 and is screwed to the limit block 3 ( Figure 5 The limit block 3 shown in the figure is provided with a threaded hole that cooperates with the locking member 6); the limit block 3 and the piston block 21 separate the oil chamber 11 into two chambers (see Figure 3 For the convenience of subsequent description, they are respectively defined as the upper chamber and the lower chamber). When the pressure difference changes inside the chamber, the piston block 21 will be driven to move, further realizing the rotation of the rotary piston 2.

[0019] See also Figure 3 and Figure 4 , a main oil regulating port 41 and a slave oil regulating port 43 are respectively provided on both sides of the limit block 3; the main oil regulating port 41 is connected to an external oil pump (not shown in the figure) through a main oil regulating passage 42, and the main oil regulating port 41 is connected to the lower chamber, and the oil pump will switch between positive pressure oil supply and negative pressure oil suction states; the slave oil regulating port 43 is connected to an external oil tank through a slave oil regulating passage 44, and the slave oil regulating port 43 is connected to the upper chamber. When the slave oil regulating port 43 hydraulically adjusts the connected chamber (upper chamber), the slave oil regulating port 43 will be affected by the oil pressure change of the lower chamber to passively adjust the internal oil pressure of the connected chamber (upper chamber). For a simple understanding, see Figure 3When the oil pump sucks oil at negative pressure, the oil in the chamber (lower chamber) connected to the main oil channel 42 decreases, and correspondingly, the oil in the chamber (upper chamber) connected to the oil regulating port 43 increases (the oil flows from the oil tank into the upper chamber), and the piston block 21 rotates clockwise at this time; when the oil pump supplies oil at positive pressure (not shown in the figure), the oil in the chamber connected to the main oil channel 42 increases, and correspondingly, the oil in the chamber (upper chamber) connected to the oil regulating port 43 decreases (the oil flows from the chamber into the oil tank), and the piston block 21 rotates counterclockwise at this time.

[0020] See also Figure 3 and Figure 4 The main oil channel 43 is provided with a buffer port 45 connected to a predetermined position in the oil chamber 11, wherein the oil port diameter of the oil port 43 is not less than the sum of the oil port diameters of the main oil port 41 and the buffer port 45. In this example, the clockwise rotating piston block 21 drives the tool clamp 002 to deliver the tool to the next process equipment. When the buffer port 45 and the main oil port 41 are both in the open state, the rotation speed of the piston block 21 is A1. The piston block 21 continues to rotate, and the piston block 21 will block the buffer port 45. The blocked buffer port 45 will reduce the flow rate of oil out of the chamber. At this time, the rotation speed of the piston block 21 is A2 (speed A2 is less than speed A1). By reducing the rotation speed of the piston block 21, a buffering effect is achieved on the tool clamp 002, thereby avoiding component collision between the side wall of the piston block 21 and the side wall of the limit block 3.

[0021] See also Figures 6 to 13 Preferably, a locking assembly for locking the piston block 21 in position is provided inside the oil chamber 11; when the side end of the limit block 3 (the side end being the end closest to the main oil regulating port 41) contacts the piston block 2, the locking assembly locks the piston block 21 in position. The locking assembly locks the rotating piston 2 in rotation, thereby further improving the stability of the rotating piston 2 on the tool removal clamp 002, optimizing the docking effect between the tool removal clamp 002 and the tool of the subsequent equipment, and preventing the rotating piston 2 from being misaligned and rotated by external force when the subsequent equipment removes the tool from the tool removal clamp 002, resulting in docking errors between the subsequent equipment and the tool removal clamp 002.

[0022] The locking assembly includes a slot 211 ( Figure 7 As shown) and the card block 7 ( Figure 9 and Figure 12 The card block 7 is a seesaw structure, which can be switched between a locked state and a locked state; one end of the card block 7 in the locked state protrudes outward and is inserted into the card slot 211 ( Figure 13 As shown), in order to realize the locking and positioning of the rotating piston 2; the protruding end of the block 7 in the locking cancellation state is retracted ( Figure 12 As shown), the rotating piston 2 can rotate at this time. Specifically, the wall of the oil chamber 11 is provided with a receiving chamber 111 for accommodating the block 7; the block 7 is a flat plate structure, of course, the block 7 can also be other structures such as a "mountain" structure; the middle predetermined position of the block 7 is hinged to the side wall of the receiving chamber 111; the piston block 21 drives the block 7 into a locked state through a driving assembly; the driving assembly includes a turntable 81 rotatably mounted on the bottom of the oil chamber 11, a protrusion 82 provided on the turntable 81 and cooperating with the piston block 21, and a movable tooth structure installed on the turntable 81 and applying a top force to the block 7, and the piston block 21 is provided with an embedding groove 212 ( Figure 8 As shown), when the side wall of the piston block 21 contacts the side wall of the limit block 3, the protrusion 82 is placed in the embedding groove 212; a turntable return spring 85 ( Figure 15 As shown), one end of the turntable return spring 85 is connected to the turntable 81, and the other end is connected to the rotary cylinder seat 1; Figure 10 and Figure 11 The movable tooth structure includes a movable tooth storage compartment provided on the outer peripheral surface of the rotating disk 81, a movable tooth 83 hinged in the movable tooth storage compartment, and a support spring 84 connecting the movable tooth 83 to the wall of the movable tooth storage compartment. When the piston block 21 rotates clockwise to the end position, its end face will contact the protrusion 82, and the protrusion 82 will facilitate the rotating piston block 21 to further drive the rotating disk 81 to rotate. When the movable tooth 83 moves to the position of the accommodating chamber 111, the movable tooth 83 will change from a retracted state (the movable tooth 83 is retracted in the movable tooth storage compartment) to an extended state (the movable tooth 83 is extended from the movable tooth storage compartment). The extended movable tooth 83 pushes the clamping block 7, causing the end (upper end) of the clamping block 7 to extend and be clamped in the clamping groove 211, thereby achieving state locking.

[0023] When the main oil port 41 is in the oil supply state, a reset assembly drives the locking block 7 into the lock-release state. The reset assembly is a reset oil cylinder located within the rotary cylinder base 1. The reset oil cylinder comprises an oil reservoir 91, one end of which is connected to the main oil passage 42, and a piston pad 92 movably mounted within the oil reservoir 91. The lower end of the oil reservoir 91 is connected to the external atmospheric pressure via a through hole provided in the rotary cylinder base 1. The piston pad 92 is connected to the outer protruding end of the locking block 7 via a connecting rope 93. The oil reservoir 91 is equipped with a reset spring 94 to reset the piston pad 92. When the piston block 21 rotates in the opposite direction and the locking positioning of the piston block 21 needs to be canceled, the oil pump starts to supply oil at positive pressure, and the oil enters the oil tank 91 from the main oil channel 42 and drives the piston pad 92 to move downward. The downward piston pad 92 pulls the outer protruding end of the clamping block 7 to reset through the connecting rope 93, thereby canceling the locking mechanism. During the resetting process of the clamping block 7, the movable tooth 83 is driven from the extended state to the retracted state, and the turntable 81 is reset under the action of the turntable reset spring 85, and the piston block 21 rotates in the opposite direction.

[0024] Of course, the present invention may have many other embodiments. Without departing from the spirit and essence of the present invention, those skilled in the art may make various corresponding changes and modifications based on the present invention, but these corresponding changes and modifications should all fall within the scope of protection of the claims attached to the present invention.

Claims

1. A hydraulic buffer, characterized in that: It comprises a rotary cylinder seat with an oil chamber therein and a rotary piston rotatably mounted in the rotary cylinder seat; The rotary piston is provided with a piston block for sensing oil pressure to drive the rotary piston to rotate; A limit block is fixedly installed inside the oil chamber to limit the rotation angle of the piston block; a main oil regulating port and a slave oil regulating port are respectively provided on both sides of the limit block; the main oil regulating port is connected to the oil pump through the main oil regulating passage; the slave oil regulating port is connected to the oil tank through the slave oil regulating passage; The main oil passage is provided with a buffer port communicating with a predetermined position of the oil chamber; The position of the limit block and the rotary cylinder seat is locked by a locking member; A locking assembly for locking the piston block in position is provided inside the oil chamber; When the side end of the limit block close to the main oil regulating port contacts the piston block, the locking assembly locks the position of the piston block; The locking assembly includes a card slot provided on the piston block and a card block cooperating with the card slot; the card block is a seesaw structure, which can be switched between a locked state and a lock-released state; One end of the locking block in the locked state protrudes outward and is locked in the slot; The protruding end of the clamping block in the lock-cancelled state is retracted; The wall of the oil chamber is provided with a receiving cavity for receiving a card block; the card block is a flat plate structure; a predetermined position in the middle of the card block is hinged to the side wall of the receiving cavity; The piston block drives the clamping block into a locked state through a driving assembly; When the main oil regulating port is in the oil supply state, a reset component drives the card block to enter the lock cancellation state.

2. The oil shock absorber according to claim 1, characterized in that: The driving assembly includes a turntable rotatably mounted on the bottom of the oil chamber, a convex block provided on the turntable and cooperating with the piston block, and a movable tooth structure installed on the turntable and applying a pushing force to the clamping block; A turntable return spring is provided between the bottom of the turntable and the rotary cylinder seat to drive the turntable to return to its original position; The movable tooth structure includes a movable tooth accommodating chamber arranged on the outer peripheral surface of the turntable, movable teeth hinged in the movable tooth accommodating chamber, and a supporting spring connecting the movable teeth and the chamber wall of the movable tooth accommodating chamber.

3. The oil shock absorber according to claim 1, characterized in that: The reset component is a reset oil cylinder arranged in the rotary cylinder seat; The reset oil cylinder includes an oil tank with one end connected to the main oil channel and a piston pad movably installed in the oil tank; the lower end of the oil tank is connected to the external atmospheric pressure through a through hole provided on the rotary cylinder seat; the piston pad is connected to the outer protruding end of the clamping block through a connecting rope.

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