CN108637637A - A kind of progressive knocking device of elastic conjunction - Google Patents

Abstract

The invention discloses a progressive knocking device for interference assembly. The left side of the driving motor is rotated and connected to a worm, the worm meshes with the worm wheel, the worm wheel is fixedly connected to the cam, the bottom of the cam is attached to the runner, and the runner is connected to the upper surface of the swing arm by rotation. The lower surface is rotated to connect the upper end of the telescopic rod, the lower part of the telescopic rod fits the upper part of the sleeve, and the lower end of the sleeve is rotated to connect the body of the device, the lower surface of the left end of the swing arm is fixedly connected to the hammer head, the inner bottom of the sleeve is provided with a spring, and the upper end of the spring touches the telescopic rod At the lower end, the left side of the worm is fixedly connected with the first bevel gear. The device drives the runner and the swing arm to swing up and down through the cam, and the swing arm drives the hammer to reciprocate and strike the upper end of the shaft so that the shaft enters the hole. At the same time, the active screw rod and the driven screw rod drive the worktable, shaft parts and hole parts to move up continuously to realize continuous knocking assembly. At the same time, the bottom of the device body is also equipped with a shock absorbing mechanism.

Description

A progressive knocking device for interference fit

technical field

The invention relates to a mechanical assembly device, in particular to a progressive knocking device for interference assembly.

Background technique

An interference fit is a fit with an interference where the tolerance zone of the hole is below the tolerance zone of the shaft. In the machining and manufacturing process, the fit state of two or more parts can be roughly divided into clearance fit, transition fit and interference fit. Interference assembly means that the paired shaft diameter is larger than the hole diameter, so special tools must be used to squeeze it in, or use the characteristics of thermal expansion and contraction to heat the hole, and quickly put it on the shaft while the hole diameter expands. The parts fit together tightly.

At present, the interference cold assembly of the shaft and the hole mostly adopts the knocking method to make the shaft squeeze into the hole, but most of the existing interference assembly still relies on manual completion, which has a low degree of automation and consumes a lot of labor and time. , is not conducive to improving work efficiency.

Contents of the invention

The object of the present invention is to provide a progressive knocking device for interference fit, so as to solve the problems raised in the above-mentioned background technology.

To achieve the above object, the present invention provides the following technical solutions:

A progressive knocking device for interference assembly, including a device body, a worm, a worm wheel, an active screw, a workbench, a clamping device, a swing arm and a sleeve. The motor base is fixedly connected to the motor base, the bolts on the motor base are fixed to the connecting device body, the left side of the driving motor rotates and connects to the worm, and the bearing at the left end of the worm rotates to the connecting device body; the worm meshes with the worm gear, and the worm gear is fixedly connected to the cam, and both the worm gear and the cam rotate to connect to the support rod The lower end, the upper end of the support rod is fixed to the body of the connection device, and the runner is attached to the bottom of the cam. The runner rotates to connect the upper surface of the swing arm, and the right end of the swing arm rotates to connect to the side wall of the device body; the lower surface of the swing arm is rotated to connect to the upper end of the telescopic rod. The lower part of the rod fits the upper part of the sleeve, and the lower end of the sleeve rotates the body of the connecting device, the lower surface of the left end of the swing arm is fixedly connected to the hammer head, the inner bottom of the sleeve is provided with a spring, and the upper end of the spring abuts against the lower end of the telescopic rod; the left side of the worm is fixedly connected The first bevel gear, the first bevel gear meshes with the second bevel gear, the second bevel gear is fixedly connected to the upper end of the active screw rod, and the bearing at the lower end of the active screw rod rotates the connecting device body; the lower part of the active screw rod is rollingly connected to the left end of the synchronous belt, the synchronous belt The right end is rollingly connected to the lower part of the driven screw rod, and the bearing at the lower end of the driven screw rod rotates the connecting device body; the active screw rod and the driven screw rod are respectively screwed to the left and right sides of the workbench, and the upper surface of the workbench is provided with a clamping device; The clamping device includes a hydraulic cylinder and a clamping ring. The left side of the hydraulic cylinder is sealed and slidably connected to the piston rod. The left end of the piston rod is rotated to connect to the clamping ring on both sides, and the middle part of the outer wall of the clamping ring is rotated to connect to the left end of the connecting rod, and the right end of the connecting rod is rotated. Connecting to the left side of the hydraulic cylinder, multiple ball grooves are equidistantly arranged on the inner circumference of the clamping ring, and ball grooves are embedded in the ball grooves.

As a further solution of the present invention: both sides of the lower end of the device body are respectively fixedly connected to the upper end of the spring telescopic rod, the lower end of the spring telescopic rod is fixedly connected to the bottom plate, and the center of the lower end of the device body is fixedly connected to the upper end of the leaf spring, and the lower ends of the leaf spring on both sides are respectively rotated and connected to the sliding block, the slide block is slidably connected to the chute, and the chute is arranged on both sides of the bottom plate.

As a further solution of the present invention: the two ends of the workbench are respectively provided with supporting feet, the supporting feet are slidably connected to guide rails, and the guide rails are arranged on the lower side wall of the device body.

As a further solution of the present invention: the upper part of the active screw rod is rotated to connect the sleeve, and the left end of the sleeve is fixed to the body of the connection device.

As a further solution of the present invention: the bearing at the upper end of the driven screw rod is rotatably connected to the horizontal plate, and the horizontal plate is fixedly connected to the body of the device.

As a further solution of the present invention: the driving motor is a forward and reverse motor.

As a further solution of the present invention: the wires of the driving motor are connected to a power supply and a switch.

Compared with the prior art, the beneficial effect of the present invention is that the device drives the runner and the swing arm to swing up and down through the cam, and the swing arm drives the hammer to reciprocate and strike the upper end of the shaft so that the shaft enters the hole, and the worm and worm drive The torque is large to ensure the percussion force, and when the hammer head is percussed, the active screw rod and driven screw rod drive the worktable, shaft parts and hole parts to move up continuously, realizing continuous percussion assembly. At the same time, the bottom of the device body is also equipped with The shock absorption mechanism greatly improves the shock resistance of the device, which is beneficial to prolong the service life and reduce noise. The structure design of the device is reasonable and applicable, and the degree of automation is high, which greatly improves the working efficiency of the interference assembly.

Description of drawings

Fig. 1 is a structural schematic diagram of a progressive knocking device for interference fit.

Fig. 2 is an enlarged view of the clamping device in the progressive knocking device for interference assembly.

Fig. 3 is a top view of the clamping device in the progressive knocking device for interference fit.

Fig. 4 is a structural schematic diagram of the telescopic rod and the sleeve in the progressive knocking device for interference assembly.

In the figure: 1-device body; 2-drive motor; 3-motor base; 4-worm; 5-worm gear; 6-cam; 7-support rod; 8-first bevel gear; 9-second bevel gear; 10-active screw rod; 11-sleeve; 12-table; 13-guide rail; 14-clamping device; 15-synchronous belt; 16-driven screw rod; 17-swing arm; Telescopic rod; 20-sleeve; 21-spring telescopic rod; 22-leaf spring; 23-slider; 24-hydraulic cylinder; 25-piston rod; 26-connecting rod; 27-clamp ring; 28-ball; - Hammerhead.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Please refer to Figures 1 to 4. In an embodiment of the present invention, a progressive knocking device for interference assembly includes a device body 1, a worm 4, a worm wheel 5, a driving screw 10, a workbench 12, a clamping device 14, a pendulum Arm 17 and casing 20; the upper right side of the device body 1 is provided with a drive motor 2, the upper part of the drive motor 2 is fixedly connected to the motor base 3, the motor base 3 is fixedly connected to the device body 1 by bolts, and the drive motor 2 is connected to the power supply and the switch by wires , and the drive motor 2 rotates on the left side to connect the worm 4, the bearing at the left end of the worm 4 rotates the connecting device body 1, the drive motor 2 is a forward and reverse motor, pressing the switch in the forward direction makes the drive motor 2 energized and drives the worm 4 to rotate forward; The worm 4 meshes with the worm wheel 5, and the worm wheel 5 is fixedly connected to the cam 6. Both the worm wheel 5 and the cam 6 rotate to connect to the lower end of the support rod 7, and the upper end of the support rod 7 is fixedly connected to the device body 1, and the bottom of the cam 6 fits the runner 18, and the runner 18 rotates Connect the upper surface of the swing arm 17, the right end of the swing arm 17 rotates to connect the side wall of the device body 1; the lower surface of the swing arm 17 rotates and connects the upper end of the telescopic rod 19, the lower part of the telescopic rod 19 fits the upper part of the sleeve 20, and the lower end of the sleeve 20 rotates The connecting device body 1, the lower surface of the left end of the swing arm 17 is fixedly connected to the hammer head 29, the inner bottom surface of the sleeve 20 is provided with a spring, the upper end of the spring abuts against the lower end of the telescopic rod 19, the spring is always in a compressed state, and the rotating worm 4 drives the worm gear 5 and the cam 6 rotates, under the action of the sleeve 20, telescopic rod 19 and the spring in the sleeve 20, the runner 18 is always attached to the cam 6, and the rotating cam 6 drives the runner 18 and the swing arm 17 to swing up and down, and the swing arm 17 Just in horizontal position when swinging down to the lowest point, runner 18 reduces the frictional resistance of cam 6.

The left side of the worm 4 is fixedly connected to the first bevel gear 8, the first bevel gear 8 meshes with the second bevel gear 9, the second bevel gear 9 is fixedly connected to the upper end of the active screw rod 10, and the upper part of the active screw rod 10 rotates to connect the sleeve 11, The left end of the sleeve 11 is fixed to the connecting device body 1, and the lower end of the active screw mandrel 10 bears the rotating connecting device body 1; the lower part of the active screw mandrel 10 is rollingly connected to the left end of the timing belt 15, and the right end of the timing belt 15 is rollingly connected to the lower part of the driven screw mandrel 16. The lower end bearing of the moving screw 16 rotates the connection device body 1, and the upper end bearing of the driven screw 16 rotates and connects the horizontal plate, the horizontal plate fixes the connection device body 1, and the rotating worm 4 is driven by the first bevel gear 8 and the second bevel gear 9 The active screw mandrel 10 rotates, and the active screw mandrel 10 utilizes the synchronous belt 15 to drive the driven screw mandrel 16 to rotate synchronously; The ends are provided with legs respectively, and the legs are slidably connected with the guide rail 13, the guide rail 13 is arranged on the side wall of the lower part of the device body 1, the upper surface of the workbench 12 is provided with a clamping device 14, and the rotating active screw rod 15 and driven screw rod 16 drive the workbench 12 upward movement.

The clamping device 14 includes a hydraulic cylinder 24 and a clamping ring 27. The left side of the hydraulic cylinder 24 is sealed and slidably connected to the piston rod 25. Rotate to connect the left end of the connecting rod 26, and connect the right end of the connecting rod 26 to the left side of the hydraulic cylinder 24. The inner circumference of the clamping ring 27 is equidistantly provided with a plurality of ball grooves, and the ball grooves are embedded with balls 28. When the swing arm 17 is in a horizontal position The hammer head 29 and the clamping ring 27 are located on the same vertical axis. By controlling the oil pressure in the hydraulic cylinder 24, the piston rod 25 is driven to expand and contract, thereby driving the clamping ring 27 to open and close the clamping shaft to keep it vertical, and the ball 28 can reduce the shaft. Resistance when falling.

Both sides of the lower end of the device body 1 are fixedly connected to the upper end of the spring telescopic rod 21, the lower end of the spring telescopic rod 21 is fixedly connected to the base plate, and the center of the lower end of the device body 1 is fixedly connected to the upper end of the leaf spring 22, and the lower ends of the leaf spring 22 on both sides are respectively rotated and connected to the slider. 23. The slide block 23 is slidably connected to the chute, and the chute is arranged on both sides of the bottom plate, and the spring telescopic rod 21 and the leaf spring 22 are used for shock absorption when the device body 1 is working.

The working principle of the present invention is: press the switch in the forward direction so that the drive motor 2 is energized to drive the worm 4 to rotate forward, and the rotating worm 4 drives the active screw 10 to rotate through the first bevel gear 8 and the second bevel gear 9, and the active screw 10 rotates. 10 Use the synchronous belt 15 to drive the driven screw 16 to follow the synchronous rotation, the rotating active screw 15 and the driven screw 16 drive the workbench 12 to move upward, and when the workbench 12 is in a proper position, turn off the switch to cut off the drive motor 2 Stop working, place the hole parts that need to be assembled on the workbench 12, and drive the piston rod 25 to expand and contract by controlling the oil pressure in the hydraulic cylinder 24, and then drive the clamping ring 27 to open and close the clamping shaft to keep it vertical, and the lower end of the shaft is aligned with the hole Press the switch forward again, the rotating worm 4 drives the worm gear 5 and the cam 6 to rotate, and under the action of the sleeve 20, the telescopic rod 19 and the spring in the sleeve 20, the runner 18 is always attached to the cam 6 and rotates The cam 6 drives the runner 18 and the swing arm 17 to swing up and down reciprocally, and the swing arm 17 drives the hammer 29 to reciprocate and strike the upper end of the shaft so that the shaft enters the hole, and the shaft continuously falls under the hammer 29 and rotates. The active screw 10 and the driven screw 16 drive the worktable 12, the hole and the shaft to move upward continuously, ensuring that the hammer head 29 can always hit the upper end of the shaft, and reduce the oil in the hydraulic cylinder 24 after the assembly is completed. Press to open the clamping ring 27 and take out the assembled shaft and hole, and press the switch in reverse to make the drive motor 2 drive the worm 4 to reverse and move the workbench 12 downwards, which is convenient for the next use.

It will be apparent to those skilled in the art that the invention is not limited to the details of the above-described exemplary embodiments, but that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Accordingly, the embodiments should be regarded in all points of view as exemplary and not restrictive, the scope of the invention being defined by the appended claims rather than the foregoing description, and it is therefore intended that the scope of the invention be defined by the appended claims rather than by the foregoing description. All changes within the meaning and range of equivalents of the elements are embraced in the present invention. Any reference sign in a claim should not be construed as limiting the claim concerned.

In addition, it should be understood that although this specification is described according to implementation modes, not each implementation mode only contains an independent technical solution, and this description in the specification is only for clarity, and those skilled in the art should take the specification as a whole , the technical solutions in the various embodiments can also be properly combined to form other implementations that can be understood by those skilled in the art.

Claims (7)

1. A progressive knocking device for interference assembly, including a device body (1), a worm (4), a worm wheel (5), an active screw (10), a workbench (12), a clamping device (14), The swing arm (17) and the bushing (20) are characterized in that a driving motor (2) is arranged on the right side of the upper end of the device body (1), and the upper part of the driving motor (2) is fixedly connected to the motor base (3), and the motor base The seat (3) is bolted to the body (1) of the connection device, the drive motor (2) rotates on the left side to connect the worm (4), and the bearing at the left end of the worm (4) rotates the body (1) of the connection device; the worm (4) meshes with the worm gear ( 5), the worm wheel (5) is fixedly connected to the cam (6), the worm wheel (5) and the cam (6) are both rotated and connected to the lower end of the support rod (7), and the upper end of the support rod (7) is fixedly connected to the device body (1), and the cam ( 6) Attach the runner (18) at the bottom, the runner (18) rotates and connects to the upper surface of the swing arm (17), and the right end of the swing arm (17) rotates to connect the side wall of the device body (1); the swing arm (17) lowers The surface is rotated to connect the upper end of the telescopic rod (19), the lower part of the telescopic rod (19) fits the upper part of the sleeve (20), and the lower end of the sleeve (20) is rotated to connect the device body (1), and the lower surface of the left end of the swing arm (17) is fixedly connected The hammer head (29), the inner bottom surface of the casing (20) is provided with a spring, and the upper end of the spring abuts against the lower end of the telescopic rod (19); the left side of the worm (4) is fixedly connected to the first bevel gear (8), and the first bevel gear (8) Engage with the second bevel gear (9), the second bevel gear (9) is fixedly connected to the upper end of the active screw rod (10), and the lower end of the active screw rod (10) bears to rotate the connecting device body (1); the active screw rod (10) The lower part is rollingly connected to the left end of the timing belt (15), and the right end of the timing belt (15) is rollingly connected to the lower part of the driven screw (16), and the lower end of the driven screw (16) bears to rotate the connecting device body (1); The screw rod (10) and the driven screw rod (16) are respectively screwed to the left and right sides of the workbench (12), and the upper surface of the workbench (12) is provided with a clamping device (14); the clamping device (14) includes a hydraulic The cylinder (24) and the clamping ring (27), the left side of the hydraulic cylinder (24) is sealed and slidingly connected to the piston rod (25), and the front and rear sides of the left end of the piston rod (25) are respectively rotated and connected to the clamping ring (27), and the clamping The middle part of the outer wall of the ring (27) rotates to connect the left end of the connecting rod (26), and the right end of the connecting rod (26) rotates to connect to the left side of the hydraulic cylinder (24). Embedded with ball (28). 2. A progressive knocking device for interference fit according to claim 1, characterized in that, the two sides of the lower end of the device body (1) are respectively fixedly connected to the upper end of the spring telescopic rod (21), and the spring telescopic rod (21) ) lower end is fixedly connected to the bottom plate, and the center of the lower end of the device body (1) is fixedly connected to the upper end of the leaf spring (22), and the lower ends of both sides of the leaf spring (22) are respectively rotated and connected to the slider (23), and the slider (23) is slidably connected to the chute, The chute is located on both sides of the bottom plate. 3. A progressive knocking device for interference assembly according to claim 1, characterized in that, the two ends of the workbench (12) are respectively provided with feet, and the feet are slidably connected to the guide rail (13), and the guide rail (13) It is arranged on the lower side wall of the device body (1). 4. A progressive knocking device for interference fit according to claim 1, characterized in that the upper part of the active screw (10) is rotatably connected to the sleeve (11), and the left end of the sleeve (11) is fixed to the connection device Ontology (1). 5 . The progressive knocking device for interference fit according to claim 1 , characterized in that, the bearing at the upper end of the driven screw ( 16 ) is rotatably connected to the horizontal plate, and the horizontal plate is fixedly connected to the device body ( 1 ). 6. The progressive knocking device for interference fit according to claim 1, characterized in that the drive motor (2) is a forward and reverse motor. 7. A progressive knocking device for interference fit according to claim 1, characterized in that the drive motor (2) is connected to a power supply and a switch by wires.