Eccentric auxiliary tool for machining crank arm of crankshaft

Abstract

The utility model discloses an eccentric assistive device for processing a crank arm of a crankshaft, which relates to the field of crankshaft processing, and comprises a table plate, four corners of the table plate are fixedly connected with support legs, the middle part of the table plate is rotatably connected with a turntable, one side of the upper surface of the turntable is fixedly connected with an inverted L-shaped frame, and the inverted L-shaped frame is fixedly connected with the table plate. And the end part of the horizontal part of the inverted L-shaped frame is fixedly connected with a laser pen irradiating downwards. The driving assembly drives the rotating disc to rotate at a constant speed, at the moment, the fixed bottom plate is driven to move towards one side under the action of centrifugal force, the elastic component in the movable hole is driven to stretch / contract and acts on the tension sensor, tension data is displayed by referring to an external digital display controller, and the position of the adjusting seat is gradually adjusted. And after required data is obtained, marking processing is conducted according to the irradiation part of the laser pen, proper data matched with the crankshaft can be rapidly obtained through centrifugal force rotation, the position of the main journal can be accurately marked according to the laser pen, and practicability is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of crankshaft processing, and particularly relates to an eccentric auxiliary tool for processing a crank arm of a crankshaft. Background Technique

[0002] A crank throw is a connecting rod journal (crank pin), and a left and a right crank arm and a left and a right main journal form a crank throw. A crankshaft is composed of several crank throws. Since the shape of the outer contour of the crank arm of the crankshaft is composed of many non-concentric arcs and straight lines, in order to realize the dynamic balance of the subsequent crankshaft, it is necessary to determine the position of the main journal on the crank arm blank.

[0003] For the processing of the outer contour of a small number of crank arms during trial production, when positioning the main journal, the position of the main journal is mostly marked by a measuring scale. This method is cumbersome to measure and is prone to marking deviation, and its practicability is poor. Content of the Utility Model

[0004] The purpose of the utility model is to provide an eccentric auxiliary tool for processing a crank arm of a crankshaft in order to solve the above problems, as described in detail below.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] An eccentric auxiliary tool for processing a crank arm of a crankshaft provided by the utility model includes a table board. Legs are fixedly connected to the four corners of the table board. A turntable is rotatably connected to the middle of the table board. One side of the upper surface of the turntable is fixedly connected with an inverted L-shaped frame. A laser pen that irradiates downward is fixedly connected to the end of the horizontal part of the inverted L-shaped frame, and the laser pen and the turntable are on the same axis. An activity groove distributed along the radial direction of the turntable is formed in the turntable. An adjusting seat is slidably connected in the activity groove. A fixed bottom plate is arranged above the adjusting seat. Ears are fixedly connected to both ends of the bottom surface of the fixed bottom plate. Activity holes are formed at both ends of the adjusting seat. Elastic members for driving the ears to move towards the middle of the adjusting seat are arranged in both activity holes at both ends, and a tension sensor is arranged in each activity hole. A plugging and connecting component for fixing the moving position of the adjusting seat is arranged on the upper surface of the turntable. A driving component for driving the turntable to rotate is arranged at one corner of the table board. A clamping component for fixing the crank arm blank is arranged on the fixed bottom plate.

[0007] When using the above-mentioned eccentric auxiliary tool for processing the crank arm of a crankshaft, place the blank on the fixed bottom plate and fix it through the clamping component. Move the adjusting seat in the movable groove according to the size of the blank and fix it through the plugging component. Then turn on the laser pen, and drive the turntable to rotate uniformly through the driving component. At this time, under the action of centrifugal force, drive the fixed bottom plate to move to one side, stretch / contract the elastic component in the movable hole at this time, and act on the tension sensor. Refer to the external digital display controller to display the tension data, and gradually adjust the position of the adjusting seat until the required data is obtained, and then perform marking processing according to the irradiated part of the laser pen.

[0008] Preferably, the driving component includes a motor fixedly installed at a corner of the table board. The output shaft of the motor extends to the upper surface of the table board and is fixedly connected with a gear. A toothed ring meshing with the gear is fixedly connected to the circumference of the upper surface of the turntable.

[0009] Preferably, a slide bar is fixedly connected in the movable groove. A slide hole sleeving the slide bar is penetrated and opened in the adjusting seat, and through holes adapted to the slide bar are opened on both ear plates. The adjusting seat is designed in a square shape and is in clearance fit with the movable groove.

[0010] Preferably, the plugging component includes a plug sleeve fixedly connected to the middle of the side wall of the adjusting seat. A plug is inserted in the plug sleeve, and a plurality of positioning holes adapted to the plug are opened on the surface of the turntable.

[0011] Preferably, a magnetic plate is fixedly connected to the end of the plug, and the magnetic plate is magnetically connected to the iron plug sleeve.

[0012] Preferably, the elastic component includes two plug rods fixedly connected to the ear plates. The number of movable holes on each side is two and is adapted to the plug rods. A spring is connected between the end of the plug rod and the inner bottom of the movable hole. The tension sensor is fixedly installed at the end of the plug rod, and a connecting rope is fixedly connected between the movable end of the tension sensor and the inner bottom of the movable hole.

[0013] Preferably, rollers are rotatably connected to the four corners of the upper surface of the adjusting seat, and the bottom surface of the fixed bottom plate abuts against the four rollers.

[0014] Preferably, the clamping component includes a through groove opened in the middle of the fixed bottom plate. A bidirectional screw rod is rotatably connected in the through groove. Square nuts are threadedly connected to both sides of the bidirectional screw rod, and the square nuts abut against the inner wall of the through groove. Arc-shaped clamping plates are fixedly connected to the upper surfaces of the two square nuts.

[0015] The beneficial effects are as follows:

[0016] Drive the turntable to rotate at a constant speed through the drive component. At this time, under the action of centrifugal force, drive the fixed base plate to move to one side, drive the elastic component in the movable hole to stretch / contract, and act on the tension sensor. Refer to the external digital display controller to display the tension data. Gradually adjust the position of the adjusting seat until the required data is obtained, and then mark and process according to the irradiated part of the laser pen. The appropriate data matching the crankshaft can be quickly obtained by rotating with centrifugal force, and the position of the main journal can be accurately marked according to the laser pen, improving the practicability. Brief Description of the Drawings

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0018] Figure 1 is a three-dimensional view of the present invention;

[0019] Figure 2 is a three-dimensional view of the turntable of the present invention;

[0020] Figure 3 is an exploded three-dimensional view of the adjusting seat and related structures of the present invention.

[0021] The reference numerals are explained as follows:

[0022] 1, table board; 2, leg; 3, drive component; 3a, motor; 3b, gear; 3c, toothed ring; 4, plug-in component; 4a, pin sleeve; 4b, pin; 4c, positioning hole; 4d, magnetic plate; 5, clamping component; 5a, through groove; 5b, bidirectional screw; 5c, square nut; 5d, arc-shaped clamping plate; 6, turntable; 7, inverted L-shaped frame; 8, laser pen; 9, movable groove; 10, adjusting seat; 11, slide bar; 12, slide hole; 13, fixed base plate; 14, ear plate; 15, plug rod; 16, movable hole; 17, spring; 18, tension sensor; 19, connecting rope; 20, roller. Detailed Embodiment

[0023] To make the purpose, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

[0024] See Figures 1-3As shown in the figure, the utility model provides an eccentric auxiliary tool for processing the crank arm of a crankshaft, which includes a table board 1. Legs 2 are fixedly connected to the four corners of the table board 1. A turntable 6 is rotatably connected to the middle of the table board 1. One side of the upper surface of the turntable 6 is fixedly connected with an inverted L-shaped frame 7. The end of the horizontal part of the inverted L-shaped frame 7 is fixedly connected with a laser pen 8 that irradiates downward, and the laser pen 8 and the turntable 6 are on the same axis. An activity groove 9 is formed in the turntable 6 along its radial direction. An adjusting seat 10 is slidably connected in the activity groove 9. Above the adjusting seat 10 is provided a fixed bottom plate 13. Both ends of the bottom surface of the fixed bottom plate 13 are fixedly connected with ear plates 14. Activity holes 16 are formed at both ends of the adjusting seat 10. Elastic members for driving the ear plates 14 to move towards the middle of the adjusting seat 10 are arranged in the two activity holes 16, and a tension sensor 18 is arranged in each activity hole 16. A plugging component 4 for fixing the moving position of the adjusting seat 10 is arranged on the upper surface of the turntable 6. A driving component 3 for driving the turntable 6 to rotate is arranged at one corner of the table board 1. A clamping component 5 for fixing the crank arm blank is arranged on the fixed bottom plate 13.

[0025] As an optional implementation manner, the driving component 3 includes a motor 3a fixedly installed at one corner of the table board 1. The output shaft of the motor 3a extends to the upper surface of the table board 1 and is fixedly connected with a gear 3b. A toothed ring 3c meshing with the gear 3b is fixedly connected to the circumference of the upper surface of the turntable 6. The motor 3a can drive the gear 3b to rotate, and the gear 3b drives the meshing toothed ring 3c to rotate, so that the motor 3a drives the turntable 6 to rotate.

[0026] Furthermore, a sliding rod 11 is fixedly connected in the activity groove 9. A sliding hole 12 sleeved with the sliding rod 11 is formed through the adjusting seat 10, and through holes adapted to the sliding rod 11 are formed in both ear plates 14. The adjusting seat 10 is designed in a square shape and has a clearance fit with the activity groove 9, which can make the adjusting seat 10 move more stably.

[0027] Refer to Figure 2 As shown in the figure, the plugging component 4 includes a plug sleeve 4a fixedly connected to the middle of the side wall of the adjusting seat 10. A plug 4b is inserted into the plug sleeve 4a. A plurality of positioning holes 4c inserted with the plug 4b are formed on the surface of the turntable 6. A magnetic plate 4d is fixedly connected to the end of the plug 4b, and the magnetic plate 4d is magnetically connected to the iron plug sleeve 4a. When the adjusting seat 10 moves to a suitable position, the plug 4b is inserted into the plug sleeve 4a and the positioning hole 4c at the same time to complete the position fixing of the adjusting seat 10. At the same time, the magnetic force of the magnetic plate 4d can prevent the plug 4b from falling off.

[0028] Refer to Figure 3As shown in the figure, the elastic component includes two insertion rods 15 fixedly connected to the ear plate 14. The number of movable holes 16 on each side is two and is adapted to the insertion rods 15. A spring 17 is connected between the end of the insertion rod 15 and the inner bottom of the movable hole 16. The tensile force sensor 18 is fixedly installed at the end of the insertion rod 15, and a connecting rope 19 is fixedly connected between the movable end of the tensile force sensor 18 and the inner bottom of the movable hole 16. When the fixed bottom plate 13 moves to one side, it drives the insertion rod 15 on one side to move out of the movable hole 16, and the insertion rod 15 on the other side inserts into the movable hole 16. At the same time, it drives the springs 17 on both sides to stretch / contract. The connecting rope 19 can fix the movable end of the tensile force sensor 18, thereby detecting the tensile force. The usage mode of the tensile force sensor 18 described in this application is realized by containing a force-sensitive device and two tensile force transmission parts. The data display of the tensile force sensor 18 can be realized by simple programming by those skilled in the art, which belongs to the common general knowledge in this field. And this application is mainly used to protect mechanical devices, so the control mode and circuit connection will not be explained in detail in this application.

[0029] Specifically, rollers 20 are rotatably connected to the four corners of the upper surface of the adjusting seat 10, and the bottom surface of the fixed bottom plate 13 abuts against the four rollers 20. The rollers 20 can make the fixed bottom plate 13 move more stably and smoothly horizontally.

[0030] As an optional implementation manner, the clamping assembly 5 includes a through groove 5a opened in the middle of the fixed bottom plate 13. A bidirectional screw 5b is rotatably connected in the through groove 5a. Square nuts 5c are threadedly connected to both sides of the bidirectional screw 5b, and the square nuts 5c abut against the inner wall of the through groove 5a. The upper surfaces of the two square nuts 5c are fixedly connected with arc-shaped clamping plates 5d. By rotating the bidirectional screw 5b, the two square nuts 5c are driven to approach each other, and at the same time, the two arc-shaped clamping plates 5d horizontally clamp and fix the crank blank.

[0031] With the above structure, during use, the blank is placed on the fixed bottom plate 13 and fixed by the clamping assembly 5. The adjusting seat 10 is moved in the movable groove 9 according to the size of the blank and fixed by the plugging assembly 4. Then the laser pen 8 is turned on, and the driving assembly 3 drives the turntable 6 to rotate at a constant speed. At this time, under the action of centrifugal force, the fixed bottom plate 13 is driven to move to one side. At this time, the elastic component in the movable hole 16 is stretched / contract, and acts on the tensile force sensor 18. Refer to the external digital display controller to display the tensile force data, and gradually adjust the position of the adjusting seat 10 until the required data is obtained, and then perform marking processing according to the irradiation position of the laser pen 8.

[0032] The above are only specific embodiments of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model can easily think of changes or substitutions, which should all be covered within the protection scope of the present utility model. Therefore, the protection scope of the present utility model shall be subject to the protection scope of the claimed rights.

Claims

1. An eccentric auxiliary tool for machining the crank arm of a crankshaft, comprising a table board (1), characterized in that: Four legs (2) are fixedly connected to the four corners of the tabletop (1). A turntable (6) is rotatably connected to the middle of the tabletop (1). One side of the upper surface of the turntable (6) is fixedly connected with an inverted L-shaped frame (7). The end of the horizontal part of the inverted L-shaped frame (7) is fixedly connected with a laser pen (8) that irradiates downward, and the laser pen (8) is on the same axis as the turntable (6). An activity groove (9) distributed along its radial direction is formed in the turntable (6). An adjustment seat (10) is slidably connected in the activity groove (9). Above the adjustment seat (10) is provided a fixed bottom plate (13). Both ends of the bottom surface of the fixed bottom plate (13) are fixedly connected with ear plates (14). Activity holes (16) are formed at both ends of the adjustment seat (10). Elastic components for driving the ear plates (14) to move towards the middle of the adjustment seat (10) are arranged in both activity holes (16), and a tension sensor (18) is arranged in each activity hole (16). An insertion assembly (4) for fixing the moving position of the adjustment seat (10) is arranged on the upper surface of the turntable (6). A driving assembly (3) for driving the turntable (6) to rotate is arranged at one corner of the tabletop (1). A clamping assembly (5) for fixing the crank blank is arranged on the fixed bottom plate (13).

2. The eccentric auxiliary tool for machining the crank arm of a crankshaft according to claim 1, characterized in that: The driving assembly (3) includes a motor (3a) fixedly installed at one corner of the tabletop (1). The output shaft of the motor (3a) extends to the upper surface of the tabletop (1) and is fixedly connected with a gear (3b). A toothed ring (3c) meshing with the gear (3b) is fixedly connected to the circumference of the upper surface of the turntable (6).

3. An eccentric auxiliary tool for machining the crank arm of a crankshaft according to claim 1, characterized in that: A sliding rod (11) is fixedly connected in the activity groove (9). A sliding hole (12) sleeving the sliding rod (11) is formed through the adjustment seat (10). Through holes adapted to the sliding rod (11) are formed in both ear plates (14). The adjustment seat (10) is designed in a square shape and is in clearance fit with the activity groove (9).

4. An eccentric auxiliary tool for machining the crank arm of a crankshaft according to claim 1, characterized in that: The insertion assembly (4) includes a pin sleeve (4a) fixedly connected to the middle of the side wall of the adjustment seat (10). A pin (4b) is inserted in the pin sleeve (4a). A number of positioning holes (4c) adapted to the pin (4b) are formed on the surface of the turntable (6).

5. The eccentric auxiliary tool for machining the crank arm of a crankshaft according to claim 4, characterized in that: A magnetic plate (4d) is fixedly connected to the end of the pin (4b), and the magnetic plate (4d) is magnetically connected to the iron pin sleeve (4a).

6. The eccentric auxiliary tool for machining the crank arm of a crankshaft according to claim 1, characterized in that: The elastic components include two insertion rods (15) fixedly connected to the ear plates (14). The number of activity holes (16) on each side is two and is adapted to the insertion rods (15). A spring (17) is connected between the end of the insertion rod (15) and the inner bottom of the activity hole (16). The tension sensor (18) is fixedly installed at the end of the insertion rod (15), and a connecting rope (19) is fixedly connected between the movable end of the tension sensor (18) and the inner bottom of the activity hole (16).

7. An eccentric auxiliary tool for machining the crank arm of a crankshaft according to claim 1, characterized in that: Rollers (20) are rotatably connected to the four corners of the upper surface of the adjustment seat (10), and the bottom surface of the fixed bottom plate (13) abuts against the four rollers (20).

8. An eccentric auxiliary tool for machining the crank arm of a crankshaft according to claim 1, characterized in that: The clamping assembly (5) includes a through groove (5a) formed in the middle of the fixed bottom plate (13). A bidirectional screw rod (5b) is rotatably connected in the through groove (5a). Square nuts (5c) are threadedly connected to both sides of the bidirectional screw rod (5b), and the square nuts (5c) are in contact with the inner wall of the through groove (5a). Arc-shaped clamping plates (5d) are fixedly connected to the upper surfaces of the two square nuts (5c).

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