Crankshaft automatic locating device

Abstract

The utility model belongs to the technical field of machine manufacturing, and relates to an automatic locating device for a crankshaft. The locating device comprises a locating support and a locating panel, and the locating panel is provided with a bearing support, a fixed sliding block support and a jacking air cylinder. A crankshaft machined on a production line is placed on the four bearings on the bearing support through the mechanical arm, the crankshaft sensing structure is used for sensing whether the crankshaft is placed or not, the crankshaft is pushed through the axial jacking mechanism to enable the end face of an eccentric cam of the crankshaft to abut against the positioning baffle, and axial positioning is achieved. At the moment, the friction wheel is moved to the position above the crankshaft through the driving mechanism, the crankshaft is tightly pressed through the rotating friction wheel to drive the crankshaft to rotate, the surface of an eccentric cam of the crankshaft is made to be close to the crankshaft eccentricity detection mechanism, the crankshaft eccentricity detection mechanism detects the crankshaft, and whether the eccentricity direction is correct or not is judged according to a detection signal. The automation degree is high, performance is reliable, and maintenance is convenient.

Description

Technical Field

[0001] The utility model belongs to the technical field of mechanical manufacturing and relates to a crankshaft automatic positioning device. Background Art

[0002] The motor of a rotary compressor does not need to convert the rotary motion of the rotor into the reciprocating motion of the piston, but directly drives the rotary piston to rotate to complete the compression of the refrigerant vapor. The rotary compressor is more suitable for small air conditioners, especially for more extensive applications in household air conditioners. The crankshaft is one of the core components of a rotary compressor. Different models of compressors have different numbers of cylinders, such as single-cylinder rotary compressors and double-cylinder rotary compressors. There is only one eccentric crankshaft part on the blank of a single-cylinder rotary compressor crankshaft; there are two eccentric crankshaft parts on the blank of a double-cylinder rotary compressor crankshaft.

[0003] With the continuous increase of the enterprise labor cost, how to effectively reduce the proportion of labor cost and stabilize the product quality is an important means for precision machining enterprises to enhance their core competitiveness in the market competition. In order to reduce staff and increase efficiency, manipulators and special automation equipment are used in crankshaft processing. However, during the use of the current crankshaft positioning equipment, it is necessary for manual workers to check the detection position of the crankshaft. The degree of automation is relatively low, and the crankshaft is prone to shift during eccentric detection, resulting in a large detection error and affecting the detection accuracy.

[0004] In order to overcome the deficiencies of the prior art, people have made continuous explorations and proposed various solutions. For example, a Chinese patent discloses a special detector for crankshaft eccentricity [Application No.: 201110199719.9], which includes a bottom plate, a dial indicator, and a workpiece positioning table. The workpiece positioning table is installed on the bottom plate, and a mounting frame is installed on the bottom plate. A dial indicator located above the workpiece positioning table is installed on the mounting frame. However, during the detection process of this solution, it is still necessary for manual workers to check the detection position of the crankshaft, and the crankshaft is still prone to shift during eccentric detection, resulting in a large detection error and affecting the detection accuracy. There are defects such as a large manual labor intensity and a relatively general degree of automation. Content of the Utility Model

[0005] The purpose of the utility model is to address the above problems and provide a crankshaft automatic positioning device. The technical problems to be solved by the utility model are how to automatically position the crankshaft in the axial and eccentric directions before crankshaft grinding processing, and how to ensure that the crankshaft has the correct position during crankshaft grinding processing.

[0006] To achieve the above object, the utility model adopts the following technical solutions:

[0007] The cam is pressed against the crankshaft to move in a straight line, and the cam is pressed against the crankshaft to move in a straight line, so that the cam can move in a straight line and move in a straight line relative to the crankshaft.

[0008] In the above-mentioned crankshaft automatic positioning device, the axial tightening mechanism includes a top plate arranged on the tightening cylinder piston rod, and a push plate is provided at one end of the top plate away from the tightening cylinder. The push plate is equipped with a head for supporting the crankshaft shaft end placed at the four bearings.

[0009] In the above-mentioned crankshaft automatic positioning device, two linear bearings are installed in the top plate, a push rod connected to the top plate is installed in the linear bearing, a buffer spring is provided on the push rod, a bearing sleeve and a bearing are installed at the center hole of the top plate, the plunger is located in the bearing and the plunger can rotate axially along the inner wall of the bearing.

[0010] In the above-mentioned crankshaft automatic positioning device, the driving mechanism includes two horizontal guide rails located on the positioning panel and a slide seat sliding along the axial direction of the horizontal guide rails, and the slide seat is equipped with two vertical guide rails and a vertical guide rail mounting plate sliding along the axial direction of the vertical guide rails, and the vertical guide rail mounting plate is equipped with a servo motor connected to the friction wheel.

[0011] In the above-mentioned crankshaft automatic positioning device, a lifting cylinder is provided on the slide seat, the power shaft of the lifting cylinder is connected to the outer cover of the servo motor, a transverse cylinder is provided on the positioning panel, the power shaft of the transverse cylinder is connected to the slide seat, and a drag chain is also provided between the positioning panel and the side of the slide seat.

[0012] In the above-mentioned crankshaft automatic positioning device, a lifting buffer mounting frame and a lifting buffer are provided in the slide seat, and the lifting buffer is located directly below the outer cover of the servo motor. A transverse buffer mounting frame and a transverse buffer are provided between the two horizontal guide rails, and the transverse buffer is arranged directly opposite the slide seat.

[0013] In the above-mentioned automatic crankshaft positioning device, the crankshaft eccentricity detection mechanism includes a detection base plate and a slide-type cylinder. A cylinder slide is installed on the slide-type cylinder, a slide plate is installed on the cylinder slide, a linear bearing box unit is installed on the slide plate, a detection rod is installed at the center of the linear bearing box unit, and the detection rod is arranged opposite to the eccentric cam of the crankshaft.

[0014] In the above-mentioned automatic crankshaft positioning device, a fixing ring is connected to the left end of the detection rod, and a detection rod spring is sleeved on the right end of the detection rod.

[0015] In the above-mentioned automatic crankshaft positioning device, a pneumatic slide limit plate is provided on the side of the cylinder slide, and a sensor limit seat and an oil buffer arranged opposite to the pneumatic slide limit plate are installed on the positioning panel.

[0016] In the above-mentioned automatic crankshaft positioning device, the crankshaft induction structure includes an inductor mounting seat, an inductor mounting shaft and an inductor support. An inductor is provided on the inductor support, and the inductor is arranged staggeredly with the bearing support.

[0017] Compared with the existing technology, the advantages of the present utility model are as follows:

[0018] 1. In the present utility model, the crankshaft processed on the production line is placed on the four bearings on the bearing support by a manipulator. The crankshaft induction structure is used to sense whether the crankshaft is placed in place. The axial tightening mechanism is used to push the crankshaft so that the end face of the crankshaft eccentric cam abuts against the positioning baffle to achieve axial positioning. At this time, the friction wheel is moved above the crankshaft through the driving mechanism, and the rotating friction wheel presses the crankshaft to drive the crankshaft to rotate, so that the surface of the crankshaft eccentric cam leans towards the crankshaft eccentricity detection mechanism, and the crankshaft is detected by the crankshaft eccentricity detection mechanism. According to the detection signal, it is judged whether the eccentric direction is correct. This device has a compact structure, high automation degree, reliable performance and convenient maintenance.

[0019] 2. In the present utility model, by setting the bearing sleeve and the bearing, when the crankshaft rotates, the top head can rotate together, preventing the end face of the crankshaft from being worn, and the buffer spring plays a buffering role.

[0020] Other advantages, objectives and features of the present utility model will be partially reflected by the following description, and partially will also be understood by those skilled in the art through the research and practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic structural diagram of the present utility model.

[0022] Figure 2 is a schematic structural diagram of the present utility model in another direction.

[0023] Figure 3 It is a schematic structural diagram of a crankshaft eccentricity detection mechanism.

[0024] Figure 4 It is a schematic structural diagram of a bearing support.

[0025] Figure 5 It is a schematic structural diagram of an axial clamping mechanism.

[0026] Figure 6 It is a schematic structural diagram of a driving mechanism.

[0027] In the figure: positioning bracket 1, positioning panel 2, bearing support 3, bearing 3a, positioning baffle 3b, fixed slider support 4, clamping cylinder 5, axial clamping mechanism 6, top plate 6a, push plate 6b, top head 6c, linear bearing 6d, push rod 6e, crankshaft induction structure 7, sensor mounting seat 7a, sensor mounting shaft 7b, sensor bracket 7c, crankshaft eccentricity detection mechanism 8, detection base plate 8a, slide-type cylinder 8b, cylinder slide 8c, slide plate 8d, linear bearing box unit 8e, friction wheel 9, driving mechanism 10, horizontal guide rail 10a, slide base 10b, vertical guide rail 10c, vertical guide rail mounting plate 10d, servo motor 10e, lifting cylinder 10f, transverse cylinder 10g, drag chain 10h, lifting buffer mounting frame 11, lifting buffer 12, transverse buffer mounting frame 13, transverse buffer 14, detection rod 15, fixing ring 16, detection rod spring 17, pneumatic slide limit plate 18, sensor limit seat 19, oil buffer 20, crankshaft 100. Specific implementation mode

[0028] The present utility model will be further described below with reference to the accompanying drawings.

[0029] As Figures 1-6 shown, a crankshaft automatic positioning device includes a positioning bracket 1 and a positioning panel 2. A bearing support 3, a fixed slider support 4 and a clamping cylinder 5 are installed on the positioning panel 2. Four rotatable bearings 3a for placing the crankshaft 100 and a positioning baffle 3b installed on the side of the bearing support 3 are provided on the bearing support 3. The piston rod of the clamping cylinder 5 is connected with an axial clamping mechanism 6 that can move back and forth in a straight line along one end close to or away from the bearing support 3. After the axial clamping mechanism 6 abuts against the shaft end of the crankshaft 100 placed at the four bearings 3a, the eccentric cam end face of the crankshaft 100 closely abuts against the positioning baffle 3b. A crankshaft induction structure 7 and a crankshaft eccentricity detection mechanism 8 that can move back and forth in a straight line along the horizontal direction are provided between the bearing support 3 and the clamping cylinder 5. A friction wheel 9 for pressing the crankshaft 100 placed at the four bearings 3a and driving the crankshaft 100 to rotate axially and a driving mechanism 10 for driving the friction wheel 9 to move are provided on the positioning panel 2.

[0030] In this embodiment, a manipulator is used to place the crankshaft 100 processed on the production line on the four bearings 3a on the bearing support 3. The crankshaft induction structure 7 is used to sense whether the crankshaft 100 is placed in place. The axial tightening mechanism 6 is used to push the crankshaft 100 so that the end face of the eccentric cam of the crankshaft 100 abuts against the positioning baffle 3b to achieve axial positioning. At this time, the driving mechanism 10 moves the friction wheel 9 above the crankshaft 100, and the rotating friction wheel 9 presses the crankshaft 100 to drive the crankshaft 100 to rotate, so that the surface of the eccentric cam of the crankshaft 100 faces the crankshaft eccentric detection mechanism 8. The crankshaft 100 is detected by the crankshaft eccentric detection mechanism 8, and whether the eccentric direction is correct is judged according to the detection signal. The device has a compact structure, high automation, reliable performance and convenient maintenance.

[0031] As shown in combination with Figures 1-6 shown, the axial tightening mechanism 6 includes a top plate 6a arranged on the piston rod of the tightening cylinder 5. A push plate 6b is provided at one end of the top plate 6a away from the tightening cylinder 5. A top head 6c for abutting against the shaft end of the crankshaft 100 placed at the four bearings 3a is installed in the push plate 6b. Two linear bearings 6d are installed in the top plate 6a. A push rod 6e connected to the top plate 6a is installed in the linear bearings 6d. A buffer spring 6f is sleeved on the push rod 6e. A bearing sleeve and a bearing are installed at the central hole of the top plate 6a. The top head 6c is located inside the bearing and the top head 6c can rotate axially along the inner wall of the bearing.

[0032] In this embodiment, the tightening cylinder 5 drives the top plate 6a, the push plate 6b and the top head 6c to move towards the end close to the crankshaft 100. The top head 6c abuts against the shaft end of the crankshaft 100, so that the end face of the eccentric cam of the crankshaft 100 abuts tightly against the positioning baffle 3b to achieve axial positioning. The bearing sleeve and the bearing can enable the top head 6c to rotate together when the crankshaft 100 rotates, preventing the end face of the crankshaft 100 from being worn. The buffer spring 6f plays a buffering role.

[0033] As shown in combination with Figure 1 and Figure 6As shown, the driving mechanism 10 includes two horizontal guide rails 10a located on the positioning panel 2 and a slide base 10b that slides along the axial direction of the horizontal guide rails 10a. Two vertical guide rails 10c and a vertical guide rail mounting plate 10d that slides along the axial direction of the vertical guide rails 10c are installed inside the slide base 10b. A servo motor 10e connected to the friction wheel 9 is installed on the vertical guide rail mounting plate 10d. A lifting cylinder 10f is provided on the slide base 10b, and the power shaft of the lifting cylinder 10f is connected to the outer casing of the servo motor 10e. A transverse movement cylinder 10g is provided on the positioning panel 2, and the power shaft of the transverse movement cylinder 10g is connected to the slide base 10b. A drag chain 10h is also provided between the side of the positioning panel 2 and the slide base 10b. A lifting buffer mounting frame 11 and a lifting buffer 12 are provided inside the slide base 10b. The lifting buffer 12 is located directly below the outer casing of the servo motor 10e. A transverse movement buffer mounting frame 13 and a transverse movement buffer 14 are provided between the two horizontal guide rails 10a, and the transverse movement buffer 14 is disposed opposite to the slide base 10b.

[0034] In this embodiment, the friction wheel 9 completes the rotation and stop actions under the drive of the servo motor 10e, the lifting action under the drive of the lifting cylinder 10f, and the forward and backward transverse movement actions under the drive of the transverse movement cylinder 10g. The transverse movement buffer 14 realizes the buffering and positioning when the friction wheel 9 moves forward, and the lifting buffer 12 realizes the buffering and positioning when the friction wheel 9 descends. When the friction wheel 9 works, it first rotates, then moves forward transversely, then descends, presses on the crankshaft 100, the crankshaft 100 rotates in place, the friction wheel 9 rises, and then moves back transversely.

[0035] The crankshaft eccentricity detection mechanism 8 includes a detection base plate 8a and a slide-type cylinder 8b. A cylinder slide 8c is installed on the slide-type cylinder 8b, and a slide plate 8d is installed on the cylinder slide 8c. A linear bearing box-type unit 8e is installed on the slide plate 8d, and a detection rod 15 is installed at the center of the linear bearing box-type unit 8e. The detection rod 15 is disposed opposite to the eccentric cam of the crankshaft 100. A fixing ring 16 is connected to the left end of the detection rod 15, and a detection rod spring 17 is sleeved on the right end of the detection rod 15. An air cylinder slide limit plate 18 is provided on the side of the cylinder slide 8c. A sensor limit seat 19 and an oil buffer 20 disposed opposite to the air cylinder slide limit plate 18 are installed on the positioning panel 2.

[0036] In this embodiment, a sensor mounting plate is installed at the left end of the skateboard 8d. A sensor is installed on the sensor mounting plate. The detection rod 15 and the sensor can move forward and backward together with the skateboard 8d. When the detection rod 15 abuts against the crankshaft 100, the detection rod spring 17 is compressed. The detection rod 15 can be pushed back alone. The rear end of the detection rod 15 presses on the sensor, and the rotational position of the crankshaft 100 can be detected. A sensor limit seat 19 and an oil buffer 20 arranged opposite to the pneumatic slide limit plate 18 are installed on the positioning panel 2. When the cylinder slide 8c moves to the right, the oil buffer 20 plays a role in buffering and positioning.

[0037] Combined with Figures 1-4 As shown, the crankshaft induction structure 7 includes an inductor mounting seat 7a, an inductor mounting shaft 7b, and an inductor support 7c. An inductor 7d is provided on the inductor support 7c, and the inductor 7d is arranged staggered with the bearing support 3.

[0038] In this embodiment, the inductor mounting seat 7a is fixed by screws. The up and down positions of the two inductor mounting shafts 7b can be adjusted by loosening and tightening the abutting screws on the side of the inductor mounting seat 7a, so as to adjust the up and down positions of the inductor support 7c and the inductor 7d.

[0039] The working principle of the utility model is:

[0040] The crankshaft 100 processed on the production line is placed on the four bearings 3a of the bearing support 3 by a manipulator. The sensor mounting base 7a is fixed by screws. The up-and-down positions of the two sensor mounting shafts 7b can be adjusted by loosening and tightening the set screws on the side of the sensor mounting base 7a, so as to adjust the up-and-down positions of the sensor bracket 7c and the sensor 7d, for sensing whether the crankshaft 100 is placed in place. The top cylinder 5 drives the top plate 6a, the push plate 6b and the top head 6c to move towards one end close to the crankshaft 100. The top head 6c abuts against the shaft end of the crankshaft 100, so that the eccentric cam end face of the crankshaft 100 abuts tightly against the positioning baffle 3b to achieve axial positioning. The bearing sleeve and the bearing enable the top head 6c to rotate together when the crankshaft 100 rotates, preventing the end face of the crankshaft 100 from being worn. The buffer spring 6f plays a buffering role. The friction wheel 9 completes the rotation and stop actions under the drive of the servo motor 10e, completes the lifting action under the drive of the lifting cylinder 10f, and completes the forward and backward lateral movement actions under the drive of the lateral movement cylinder 10g. The lateral movement buffer 14 realizes the buffering and positioning when the friction wheel 9 moves forward. The lifting buffer 12 realizes the buffering and positioning when the friction wheel 9 descends. When the friction wheel 9 works, it first rotates, then moves laterally forward, then descends, presses on the crankshaft 100, the crankshaft 100 rotates in place, the friction wheel 9 rises, and laterally retreats. A sensor mounting plate is installed at the left end of the slide plate 8d, and a sensor is installed on the sensor mounting plate. The detection rod 15 and the sensor can advance and retreat together with the slide plate 8d. When the detection rod 15 abuts against the crankshaft 100, the detection rod spring 17 is compressed, and the detection rod 15 can be pushed back alone. The rear end of the detection rod 15 presses on the sensor, and the rotation position of the crankshaft 100 can be detected. A sensor limit seat 19 and an oil buffer 20 disposed opposite to the pneumatic slide limit plate 18 are installed on the positioning panel 2. When the cylinder slide 8c moves to the right, the oil buffer 20 plays a buffering and positioning role.

[0041] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Those skilled in the art to which the present invention pertains can make various modifications or supplements to the described specific embodiments or use similar ways to replace them, but will not deviate from the spirit of the present invention.

[0042] Although terms such as positioning bracket 1, positioning panel 2, bearing support 3, bearing 3a, positioning baffle 3b, fixed slider support 4, jacking cylinder 5, axial jacking mechanism 6, top plate 6a, push plate 6b, jacking head 6c, linear bearing 6d, push rod 6e, crankshaft induction structure 7, inductor mounting seat 7a, inductor mounting shaft 7b, inductor support 7c, crankshaft eccentricity detection mechanism 8, detection base plate 8a, slide-type cylinder 8b, cylinder slide 8c, slide plate 8d, linear bearing box unit 8e, friction wheel 9, drive mechanism 10, horizontal guide rail 10a, slide base 10b, vertical guide rail 10c, vertical guide rail mounting plate 10d, servo motor 10e, lifting cylinder 10f, transverse movement cylinder 10g, cable carrier 10h, lifting buffer mounting bracket 11, lifting buffer 12, transverse movement buffer mounting bracket 13, transverse movement buffer 14, detection rod 15, fixing ring 16, detection rod spring 17, pneumatic slide limit plate 18, sensor limit seat 19, hydraulic buffer 20, crankshaft 100, etc. are used more frequently in this text, the possibility of using other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of the present utility model, and interpreting them as any kind of additional limitation is contrary to the spirit of the present utility model.

Claims

1. An automatic crankshaft positioning device, comprising a positioning bracket (1) and a positioning panel (2), characterized in that, A bearing support (3), a fixed slider support (4) and a clamping cylinder (5) are installed on the positioning panel (2). Four rotatable bearings (3a) for placing the crankshaft (100) and a positioning baffle (3b) installed on the side of the bearing support (3) are provided on the bearing support (3). The piston rod of the clamping cylinder (5) is connected with an axial clamping mechanism (6) which can move back and forth linearly along one end close to or away from the bearing support (3). After the axial clamping mechanism (6) abuts against the shaft end of the crankshaft (100) placed at the four bearings (3a), the eccentric cam end face of the crankshaft (100) abuts tightly against the positioning baffle (3b). A crankshaft induction structure (7) and a crankshaft eccentricity detection mechanism (8) which can move back and forth linearly in the horizontal direction are provided between the bearing support (3) and the clamping cylinder (5). A friction wheel (9) for pressing the crankshaft (100) placed at the four bearings (3a) and driving the crankshaft (100) to rotate axially and a driving mechanism (10) for driving the friction wheel (9) to move are provided on the positioning panel (2).

2. The automatic crankshaft positioning device according to claim 1, characterized in that, The axial clamping mechanism (6) includes a top plate (6a) arranged on the piston rod of the clamping cylinder (5). A push plate (6b) is provided at one end of the top plate (6a) away from the clamping cylinder (5). A top head (6c) for abutting against the shaft end of the crankshaft (100) placed at the four bearings (3a) is installed in the push plate (6b).

3. The automatic crankshaft positioning device according to claim 2, wherein, Two linear bearings (6d) are installed in the top plate (6a). A push rod (6e) connected with the top plate (6a) is installed in the linear bearings (6d). A buffer spring (6f) is sleeved on the push rod (6e). A bearing sleeve and a bearing are installed at the central hole of the top plate (6a). The top head (6c) is located inside the bearing and the top head (6c) can rotate axially along the inner wall of the bearing.

4. A crankshaft automatic positioning device according to claim 1, characterized in that The driving mechanism (10) includes two horizontal guide rails (10a) located on the positioning panel (2) and a slide base (10b) sliding axially along the horizontal guide rails (10a). Two vertical guide rails (10c) and a vertical guide rail mounting plate (10d) sliding axially along the vertical guide rails (10c) are installed in the slide base (10b). A servo motor (10e) connected with the friction wheel (9) is installed on the vertical guide rail mounting plate (10d).

5. The automatic crankshaft positioning device according to claim 4, characterized in that, A lifting cylinder (10f) is provided on the slide base (10b). The power shaft of the lifting cylinder (10f) is connected with the outer cover of the servo motor (10e). A transverse movement cylinder (10g) is provided on the positioning panel (2). The power shaft of the transverse movement cylinder (10g) is connected with the slide base (10b). A drag chain (10h) is also provided between the positioning panel (2) and the side part of the slide base (10b).

6. The automatic crankshaft positioning device according to claim 5, characterized in that A lifting buffer mounting rack (11) and a lifting buffer (12) are provided in the slide base (10b). The lifting buffer (12) is located directly below the outer cover of the servo motor (10e). A transverse movement buffer mounting rack (13) and a transverse movement buffer (14) are provided between the two horizontal guide rails (10a). The transverse movement buffer (14) is arranged opposite to the slide base (10b).

7. The automatic crankshaft positioning device according to claim 1, characterized in that, The crankshaft eccentricity detection mechanism (8) includes a detection base plate (8a) and a slide-type cylinder (8b). A cylinder slide (8c) is installed on the slide-type cylinder (8b), and a slide plate (8d) is installed on the cylinder slide (8c). A linear bearing box unit (8e) is installed on the slide plate (8d), and a detection rod (15) is installed at the center of the linear bearing box unit (8e). The detection rod (15) is arranged opposite to the eccentric cam of the crankshaft (100).

8. The automatic crankshaft positioning device according to claim 7, wherein A fixing ring (16) is connected to the left end of the detection rod (15), and a detection rod spring (17) is sleeved on the right end of the detection rod (15).

9. The automatic crankshaft positioning device according to claim 8, characterized in that, A pneumatic slide limit plate (18) is provided on the side of the cylinder slide (8c). A sensor limit seat (19) and an oil buffer (20) arranged opposite to the pneumatic slide limit plate (18) are installed on the positioning panel (2).

10. The automatic crankshaft positioning device according to claim 1, characterized in that The crankshaft induction structure (7) includes an inductor mounting base (7a), an inductor mounting shaft (7b), and an inductor support (7c). An inductor (7d) is provided on the inductor support (7c), and the inductor (7d) is arranged staggeredly with the bearing support (3).

Images