CN102607433B - Multi-point detection device for thickness of bearing bush - Google Patents

Abstract

The invention relates to a multi-point detection device for thickness of a bearing bush, which comprises a mechanical supporting mechanism, a bearing bush positioning and clamping mechanism, a measuring mechanism and a rotating and adjusting mechanism. The measuring principle accords with the Abbe principle, and materials are manually loaded and unloaded by employing a high-precision grating sensor, an inductance type sensor or a laser sensor; air pressure serves as a clamping driving force, a detection point is set to completely accord with the national standards, and the detection requirements of the bearing bush with different diameters and different thicknesses can be met. The multi-point detection device for the thickness of the bearing bush has the advantages that the device is small in volume, low in cost and high in detection precision and is not affected by human factors and errors of the end face of the bearing bush on the verticality of the axis, the detection can be strictly performed according to the national standards, the detection data can be recorded and traced back, the bearing bush is not required to manually turned, the detection efficiency is high, an inner surface of the bearing bush is not scratched during detection, etc. According to the multi-point detection device for the thickness of the bearing bush, the defects existing in the existing technology and device for detecting the thickness of the bearing bush are overcome, and the application prospect is wide.

Description

Bearing thickness multi-point detection device

Technical field

The invention belongs to the field of bearing bush thickness detection, and in particular relates to a bearing bush thickness multi-point detection device.

Background technique

Bearing bush is one of the parts with large production and sales volume and high manufacturing precision requirements in the automobile and internal combustion engine industries. Whether its thickness is qualified or not seriously affects the performance and life of the supporting host. Therefore, GB/T3162-1991 has higher requirements on the tolerance of bearing bush thickness. In order to ensure the radial clearance of the bearing pad when it is working, reduce the high requirements for the manufacturing process and reduce the production cost, the group interchange assembly method is often used, that is, the thickness of the bearing pad and the shaft diameter are processed with economical precision requirements, and then precise measurement is performed. And sorting, according to the measurement results, the bearing bushes and shafts are grouped and assembled according to the sorting size. Therefore, the thickness of the bearing pad generally needs to be fully inspected to ensure the requirements of group interchange assembly. For the testing of bearing bush thickness, GB/T18330-2001 stipulates that point measurement or line measurement can be used. When using the point measurement method, according to the difference in the outer diameter of the bearing bush, it should be carried out at 6 points or 10 points distributed at 0°, ±32.5° and ±65° on 1 to 3 axial sections of the bearing bush. At present, the domestic instruments for testing the thickness of bearing pads mainly include screw micrometers, manual special inspection tools and fully automatic bearing pad thickness testing instruments. Although the cost of using a screw micrometer to detect the thickness of the bearing pad is low, the efficiency is low, and the detection accuracy is greatly affected by human factors, and the recording of the detection data needs to be done manually; For the positioning reference, the bearing bush is manually clamped, and the measurement result is displayed with a dial gauge. Its disadvantages are that the influence of human factors is large, the perpendicularity of the end face of the bearing bush to its axis will seriously affect the measurement accuracy of the thickness, the position of the measurement point cannot be strictly in accordance with the angle specified by the national standard, and the bearing bush will be in contact with the head of the dial indicator when it is put in. The inner surface of the bearing pad will be scratched when it is collided or rotated, and the pad needs to be turned over manually; the "mechanical system device for automatic detection and sorting machine of bearing pad thickness" published by the invention patent ZL03142253.5 belongs to a fully automatic bearing pad thickness detection instrument. It adopts high-precision grating displacement sensor, which has the functions of high detection accuracy, automatic feeding, automatic detection, automatic sorting and automatic recording of measured values. It has complete functions, but is expensive, and can only detect the thickness of two axial sections in the 0° direction of the bearing bush. These have seriously affected its large-scale promotion and application. The industry is in urgent need of a bearing pad thickness detection device with high detection accuracy, high efficiency, reasonable price, and measurement points that fully meet the requirements of national standards.

Contents of the invention

The purpose of the present invention is to provide a bearing pad thickness multi-point detection device that can better meet the production requirements, and realize the detection of the bearing pad thickness with high precision, low cost, and fully meeting the requirements of national standards. It includes four parts: mechanical support mechanism, bearing pad positioning and clamping mechanism, measuring mechanism, rotating and adjusting mechanism.

The mechanical supporting mechanism is composed of a vertical plate 41, a horizontal plate 34, a partition 53, a sensor mounting plate 17, an eighth screw 36, a twelfth screw 54, a fifteenth screw 67, and a third pin 55. The vertical plate 41 is fixedly connected with the horizontal plate 34 by the fifteenth screw 67 . The vertical plate 41 is fixedly connected with the partition plate 53 by the eighth screw 36 . The horizontal plate 34 is fixedly connected with the sensor mounting plate 17 through the twelfth screw 54 and the third pin 55 .

The bearing pad positioning and clamping mechanism consists of a zero probe 13, a zero probe mounting rod 28, a guide block 42, a floating plate 30, a V-shaped block mounting block 15, a V-shaped block 16, a first guide sleeve 18, Guide rod 19, cylinder push plate 23, cylinder 57, first nut 20, third nut 59, second nut 39, first spring washer 21, second spring washer 68, third screw 14, sixth screw 27, the first The nine screw 48, the eleventh screw 51, the thirteenth screw 56, the fourteenth screw 58, the third spring 49, etc.; Three nuts 59 are fastened. The zero measuring head installation rod 28 cooperates with the pin holes in the guide block 42 and the horizontal plate 34 , is connected with the guide block 42 through threads, and is locked by the second spring washer 68 and the second nut 39 . The floating plate 30 is coupled with the rotating plate 33 through the ninth screw 48 and the third spring 49 . The guide block 42 is fixedly connected with the horizontal plate 34 through the eleventh screw 51 . The V-shaped block 16 is fixedly connected with the V-shaped block mounting block 15 through the sixth screw 27 . The third screw 14 is coupled with the screw hole in the V-shaped block mounting block 15 . The guide rod 19 is connected with the V-shaped block mounting block 15 through a screw hole, and is slidably matched with the first guide sleeve 18 . The first guide sleeve 18 is closely matched with the sensor mounting plate 17 . The cylinder push plate 23 is fixedly connected with the guide rod 19 through the first nut 20 and the first spring washer 21 , and is fixedly connected with the cylinder 57 through the fourteenth screw 58 . The cylinder 57 is fixedly connected with the sensor mounting plate 17 through the thirteenth screw 56 .

The measuring mechanism is composed of a measuring sensor 22 , a control and display 26 , a fourth screw 24 and a fifth screw 25 . The measuring sensor 22 is fastened to the sensor mounting plate 17 by the fifth screw 25, and the center line of the measuring rod is coaxial with the axis of the middle hole of the V-shaped block mounting block 15 and the V-shaped block 16, and passes through the spherical center of the zero-position measuring head 13 . The fourth screw 24 is connected with the sensor mounting plate 17 through a screw hole. Controls and displays 26 rest on a horizontal plate 34 .

The described rotation and adjustment mechanism is composed of hand wheel 4, latch 5, hand wheel shaft 52, first key 6, second key 70, first pin 3, second pin 7, gear 37, up and down adjusting rod 47, spring collar 38. Limit pin 40, second guide sleeve 43, detection base plate 11, adjustment plate 2, locking screw 29, first spring 31, second spring 46, fourth spring 60, fifth spring 64, guide sleeve 44, Guide column 45, rotating plate 33, pusher plate 8, bearing pad baffle 9, second screw 10, seventh screw 32, tenth screw 50, eleventh screw 51, handle 61, angle positioning rod 62, large screw 63 , Screw sleeve 65 forms. The handwheel 4 is connected with the handwheel shaft 52 through the first key 6 . The latch 5 is inserted into the axial section positioning hole 69 on the end face of the handwheel 4 and the corresponding hole on the vertical plate 41 . The second pin 7 is inserted into the pin hole at the end of the handwheel shaft 52 . The gear 37 is fixedly connected with the handwheel shaft 52 through the second key 70 , and is axially limited by two spring collars 38 , and meshes with the rack on the up and down adjusting rod 47 . The up and down adjusting rod 47 is slidingly matched with the second guide sleeve 43 and fixedly connected with the detection base plate 11 through the tenth screw 50 . The second guide sleeve 43 is tightly fitted in the holes of the guide block 42 and the horizontal plate 34 . The guide block 42 is fixedly connected with the horizontal plate 34 through the eleventh screw 51 . The limit pin 40 is inserted in the hole on the up and down adjusting rod 47 . The second spring 46 is located between the detection bottom plate 11 and the horizontal plate 34 . The guide column 45 is fixedly connected with the detection base plate 11 through threads, inserted into the second spring 46 , and slidably matched with the guide sleeve 44 . The guide sleeve 44 is tightly fitted in the hole of the horizontal plate 34 . The adjustment plate 2 and the detection bottom plate 11 are positioned by the first pin 3 and fastened by the first screw 1 . The locking screw 29 is inserted into the pin hole in the rotating plate 33 through the fourth spring 60, and is fixedly connected with the adjusting plate 2 through the screw hole. The pushing plate 8 is connected with the rotating plate 33 through the first spring 31 and the seventh screw 32 . The second screw 10 is fixedly connected with the pusher plate 8 through the long groove on the bearing bush baffle plate 9 . The handle 61 is connected with the angle positioning rod 62 through threads. The angle positioning rod 62 slides with the hole in the large screw 63 through the fifth spring 64 , and is inserted into the angle positioning hole 35 on the adjustment plate 2 under the action of the fifth spring 64 . The screw sleeve 65 is connected with the large screw 63 by threads. The large screw 63 is connected with the rotating plate 33 by threads.

The advantages of the present invention are:

1. Compared with the spiral micrometer and manual special inspection tool, its detection accuracy is not affected by human factors, and the perpendicularity of the end face of the bearing bush to its axis will not affect the detection accuracy, and the detection of thickness on different axial sections does not require manual work Turn over the tile, so the detection accuracy and efficiency are high. At the same time, the inner surface of the bearing pad will not be scratched when it rotates;

2. Compared with the automatic bearing pad thickness testing instrument, it is small in size, small in floor space, low in cost, and the position of the testing point can be strictly in accordance with the national standard.

Based on the characteristics of the invention and the current domestic situation of detection of the thickness of bearing pads, the invention has broad application prospects and can bring considerable economic and social benefits.

Description of drawings

Fig. 1 is a structural schematic diagram of a multi-point detection device for bearing pad thickness according to the present invention.

Fig. 2 is a partial sectional view along line B-B of Fig. 1 .

Fig. 3 is a cross-sectional view of A-A in Fig. 2 .

Fig. 4 is a top view of Fig. 1 .

FIG. 5 is a partial enlarged view of A in FIG. 3 .

FIG. 6 is a schematic diagram of rotating the rotating plate 33 of FIG. 1 by 32.5°.

FIG. 7 is a schematic diagram of rotating the rotating plate 33 of FIG. 1 by 65°.

Fig. 8 is a schematic diagram showing the thickness of each measurement point on the middle axial section of the bearing pad detected by the multi-point detection device for the thickness of the bearing pad according to the present invention.

Fig. 9 is a schematic diagram showing the thickness of each measurement point on the uppermost axial section of the bearing pad detected by the multi-point detection device for the thickness of the bearing pad according to the present invention.

Fig. 10 is a schematic diagram of detecting the thickness of a large-diameter bearing pad by the multi-point detection device for bearing pad thickness according to the present invention.

In the figure, 1. the first screw, 2. the adjustment plate, 3. the first pin, 4. the hand wheel, 5. the latch, 6. the first key, 7. the second pin, 8. the pushing plate, 9. the bearing bush Baffle plate, 10. Second screw, 11. Detection base plate, 12. Bearing bush to be tested, 13. Zero position probe, 14. Third screw, 15. V-block mounting block, 16. V-block, 17. Sensor Mounting plate, 18. First guide sleeve, 19. Guide rod, 20. First nut, 21. First spring washer, 22. Measuring sensor, 23. Cylinder push plate, 24. Fourth screw, 25. Fifth screw , 26. Control and display, 27. Sixth screw, 28. Zero probe mounting rod, 29. Locking screw, 30. Floating plate, 31. First spring, 32. Seventh screw, 33. Rotating plate, 34. Horizontal plate, 35. Angle positioning hole, 36. Eighth screw, 37. Gear, 38. Spring collar, 39. Second nut, 40. Limit pin, 41. Vertical plate, 42. Guide block, 43 .Second guide sleeve, 44. Guide sleeve, 45. Guide column, 46. Second spring, 47. Up and down adjustment rod, 48. Ninth screw, 49. Third spring, 50. Tenth screw, 51. Tenth One screw, 52. hand wheel shaft, 53. clapboard, 54. the twelfth screw, 55. the third pin, 56. the thirteenth screw, 57. cylinder, 58. the fourteenth screw, 59. the third nut, 60. Fourth spring, 61. Handle, 62. Angle positioning rod, 63. Large screw, 64. Fifth spring, 65. Screw sleeve, 66. Disassembly hole, 67. Fifteenth screw, 68. Second spring Gasket, 69. axial section positioning hole, 70. second key, 71. operation hole, 72. large floating plate.

Detailed ways

In the embodiment shown in Fig. 1, after turning on the gas source and the power supply, the V-shaped block 16 leaves the zero-position probe 13 under the drive of the cylinder 57, returns to the uppermost position, and presses the calibration button on the control and display 26 ( Not shown in the figure), the measuring rod of measuring sensor 22 stretches out, passes the hole in the middle of V-shaped block mounting block 15 and V-shaped block 16, contacts with the spherical surface of zero position probe 13. The measurement results are displayed on the control and display 26 . At this time, the indication value of the sensor is set to zero through the zero button (not shown in the figure) on the control and display 26, and the measuring rod of the measuring sensor 22 returns to the initial position to complete the calibration operation. This calibration operation does not need to be carried out before each piece of bearing bush is tested, and can be calibrated once every shift, every day or for a longer period of time. When testing, place an axial end surface of the bearing bush 12 to be tested on the testing bottom plate 11, and limit the position by the pushing plate 8 and the bearing bush baffle 9. The pushing plate 8 keeps the inner surface of the tested bearing bush 12 from contacting the zero position measuring head 13 under the action of the first spring 31 . The detection bottom plate 11 is in the uppermost position under the action of the second spring 46 and is limited by the limit pin 40 to ensure that the distance between the measurement point of the measurement sensor 22 and the lower end surface of the bearing bush meets the standard requirements. Press the detection button (not shown in the figure) on the control and display 26, the cylinder 57 acts, drives the V-shaped block 16 to push the outer surface of the bearing bush 12 to be tested, compresses the first spring 31, and presses the bearing bush to be tested with a constant pressure. The inner surface of 12 is pressed on the zero measuring head 13. At this time, the measuring rod of the measuring sensor 22 protrudes and contacts the outer surface of the bearing bush 12 to be measured. At this time, the indicated value of the measurement sensor 22 is the thickness value of the measured bearing bush 12 at the measurement point located in the 0° direction. The test results can also be output to storage devices such as external computers and U disks through the data interface (not shown) on the control and display 26, so as to carry out subsequent quality analysis and problem tracing. Then, the measuring rod of the measuring sensor 22 and the V-shaped block 16 are both retracted to the initial position, and the bearing bush 12 to be tested is also pushed away from the zero-position measuring head 13 by the pusher plate 8 under the action of the first spring 31 to ensure that the measured The inner surface of the bearing bush 12 is not scratched when it rotates. At this point, the detection operation for one measurement point ends. For the measurement points of the measured bearing bush 12 in other angular directions on the axial section, the angle positioning rod 62 can be pulled up through the handle 61, the rotating plate 33 together with the floating plate 30 and the measured bearing bush 12 can be rotated to a specified angle, and By inserting the angle positioning rod 62 into the corresponding angle positioning hole 35, the detection can be repeated until all the specified measuring points in each angle direction on the axial section are detected. For the detection of the thickness of the measuring point on the different axial sections of the bearing bush, pull out the pin 5 and turn the hand wheel 4 counterclockwise to align the second axial section positioning hole 69 with the corresponding hole on the vertical plate 41, and insert the pin 5 to make it fixed. At this time, the upper and lower adjustment rods 47 drive the adjustment plate 2, the measured bearing bush 12, the floating plate 30 and the rotating plate 33 to descend together to a place where the distance between the center line of the measuring sensor 22 measuring rod and the end face of the tested bearing bush 12 is half the width of the bearing bush. And zero probe 13 and measuring sensor 22 all remain motionless. In this way, each point on the axial middle section of the tested bearing bush 12 can be detected. Repeat the above operations, rotate the hand wheel 4, make the third axial section positioning hole 69 on the end face align with the corresponding hole on the vertical plate 41, insert the pin 5, and then the third axial section of the bearing bush 12 under test can be aligned. Thickness testing is performed at each measuring point on the board. In this way, all the measurement points specified in the national standard located on different axial sections and different angular directions of the bearing bush have been tested.

According to the basic theory of length detection, whether the center line of the measuring rod of the measuring sensor 22 passes through the center of the sphere of the zero probe 13, whether it coincides with the normal line of the outer surface of the tested bearing bush 12, and whether it coincides with the vertical middle section of the V-shaped block 16 Both seriously affect the accuracy of bearing pad thickness detection. At the same time, there must be manufacturing errors in each part during the processing process, and looseness, wear and collision will inevitably occur during the use of the device. For this reason, in the embodiment shown in Fig. 1, three sets of adjustment devices are designed so that corresponding adjustments can be made during assembly and use. The first set of adjustment device is that in order to ensure that the center line of the measuring rod of the measuring sensor 22 is equal to the center of the sphere of the zero measuring head 13, a threaded connection is designed on the bottom of the zero measuring head mounting rod 28 and the guide block 42, loose After the second nut 39 is opened, the center height of the zero probe 13 can be easily adjusted through the operation hole 71 on the zero probe mounting rod 28 , and locked by the second nut 39 and the second spring washer 68 . The second set of adjustment device is to ensure that the center line of the measuring rod of the measuring sensor 22 coincides with the vertical mid-section of the V-shaped block 16, first unscrew the sixth screw 27, and install it with the V-shaped block by being positioned at both sides of the V-shaped block 16. Two third screws 14 of block 15 threaded connections regulate the left and right positions of the vertical middle section of V-shaped block 16 . The third set of adjustment device is, in order to make the center line of the measuring rod of the measuring sensor 22 coincide with the normal line of the outer surface of the bearing bush 12 to be measured, first loosen the fifth screw 25, and adjust the position between the two sides of the measuring sensor 22 and the sensor mounting plate. Four fourth screws 24 of 17 threaded connections are realized.

In the embodiment shown in Fig. 1, when the V-shaped block 16 presses the tested bearing bush 12 to the zero-position probe 13 under the action of the cylinder 57, the spatial attitude of the tested bearing bush 12 is completely controlled by the V-shaped block 16 and the zero-position probe. The relative position of the measuring head 13 is determined. Because the diameter of three ninth screw 48 through holes on the floating plate 30 is greater than the diameter of the ninth screw 48, the floating plate 30 that is coupled on the rotating plate 33 by the ninth screw 48 and the third spring 49 is in a floating posture, so that it can Eliminate the adverse effect on thickness detection caused by the perpendicularity error between the axial end surface of the tested bearing bush 12 and its axis.

In the embodiment shown in Figure 1, for the multi-point detection of the thickness of the large-diameter bearing pad, the first screw 1 can be loosened, the first pin 3 can be pulled out, the adjustment plate 2 can be moved outward to a proper position, and then the first pin 3 into the corresponding pin holes on the adjustment plate 2 and the detection base plate 11. In order to prevent the floating plate 30 from interfering with the zero probe mounting rod 28 when the bearing bush is rotated, the floating plate 30 is replaced with a large floating plate 72, and the relative position between the bearing bush baffle plate 9 and the pusher plate 8 is adjusted by the second screw 10 at the same time. position to ensure the accurate limit of the bearing pad (as shown in Figure 10).

In the embodiment shown in FIG. 1 , the assembly and disassembly holes 66 are provided for the convenience of disassembly and assembly of the large screws 63 .

Claims (1)

1. a half bearing thickness multipoint detection device, comprise mechanical support mechanism, bearing shell positioning and clamping mechanism, measuring mechanism, rotate and adjusting mechanism four parts, it is characterized in that: mechanical support mechanism is by riser (41), leveling board (34), dividing plate (53), installation of sensors plate (17), the 8th screw (36), the 12 screw (54), the 15 screw (67), the 3rd pin (55) composition, riser (41) connects firmly by the 15 screw (67) with leveling board (34), riser (41) connects firmly by the 8th screw (36) with dividing plate (53), leveling board (34) connects firmly by the 12 screw (54) and the 3rd pin (55) with installation of sensors plate (17), bearing shell positioning and clamping mechanism is by zero-bit gauge head (13), zero-bit gauge head mounting rod (28), orienting lug (42), float plate (30), V-block mounting blocks (15), V-block (16), the first guide pin bushing (18), guide rod (19), cylinder push pedal (23), cylinder (57), the first nut (20), the 3rd nut (59), the second nut (39), the first spring washer (21), the second spring washer (68), the 3rd screw (14), the 6th screw (27), the 9th screw (48), the 11 screw (51), the 13 screw (56), the 14 screw (58), the 3rd spring (49) composition, zero-bit gauge head (13) coordinates by pin-and-hole with zero-bit gauge head mounting rod (28), and fastening by the 3rd nut (59), zero-bit gauge head mounting rod (28) coordinates with the pin-and-hole in orienting lug (42) and leveling board (34), connect with orienting lug (42) by screw thread, and by the second spring washer (68) and the second nut (39) locking, float plate (30) connects with rotor plate (33) by the 9th screw (48) and the 3rd spring (49), orienting lug (42) connects firmly by the 11 screw (51) with leveling board (34), V-block (16) connects firmly by the 6th screw (27) with V-block mounting blocks (15), the 3rd screw (14) connects with the screw in V-block mounting blocks (15), guide rod (19) connects by screw with V-block mounting blocks (15), and be slidably matched with the first guide pin bushing (18), the first guide pin bushing (18) and installation of sensors plate (17) close-fitting, cylinder push pedal (23) connects firmly by the first nut (20) and the first spring washer (21) with guide rod (19), and connect firmly by the 14 screw (58) and cylinder (57), cylinder (57) connects firmly by the 13 screw (56) and installation of sensors plate (17), measuring mechanism is made up of survey sensor (22), control and display (26), the 4th screw (24) and the 5th screw (25), survey sensor (22) is fastening by the 5th screw (25) and installation of sensors plate (17), its sounding rod is coaxial with the hole in the middle of V-block mounting blocks (15) and V-block (16), and by the centre of sphere of zero-bit gauge head (13), the 4th screw (24) connects by screw with installation of sensors plate (17), rotate with adjusting mechanism by handwheel (4), latch (5), hand wheel shaft (52), first key (6), the second key (70), the first pin (3), the second pin (7), gear (37), up-down adjustment bar (47), spring collar (38), spacer pin (40), the second guide pin bushing (43), detect base plate (11), adjustable plate (2), lock-screw (29), the first spring (31), the second spring (46), the 4th spring (60), the 5th spring (64), orienting sleeve (44), guidepost (45), rotor plate (33), scraping wings (8), bearing shell baffle plate (9), the second screw (10), the 7th screw (32), the tenth screw (50), handle (61), angle orientation bar (62), large screw (63), swivel nut (65) composition, handwheel (4) connects by first key (6) with hand wheel shaft (52), latch (5) inserts in first axial cross section pilot hole (69) and the upper corresponding hole of riser (41) on handwheel (4) end face, the second pin (7) inserts in the pin-and-hole of hand wheel shaft (52) end, gear (37) connects firmly by the second key (70) and hand wheel shaft (52), by two spring collars (38) axial limiting, and engage with the tooth bar on up-down adjustment bar (47), up-down adjustment bar (47) is slidably matched with the second guide pin bushing (43), and connect firmly by the tenth screw (50) and detection base plate (11), the second guide pin bushing (43) is tight with in the hole of orienting lug (42) and leveling board (34), spacer pin (40) inserts in the hole on up-down adjustment bar (47), the second spring (46) is positioned at and detects between base plate (11) and leveling board (34), guidepost (45) connects firmly by screw thread with detection base plate (11), insert in the second spring (46), and be slidably matched with orienting sleeve (44), orienting sleeve (44) is tight with in the hole of leveling board (34), adjustable plate (2) is located by the first pin (3) with detection base plate (11), and fastening by the first screw (1), lock-screw (29) inserts in the pin-and-hole in rotor plate (33) by the 4th spring (60), and connect firmly by screw and adjustable plate (2), scraping wings (8) connects with rotor plate (33) by the first spring (31) and the 7th screw (32), the second screw (10) connects firmly through elongated slot and scraping wings (8) on bearing shell baffle plate (9), handle (61) passes through thread connection with angle orientation bar (62), angle orientation bar (62) is slidably matched by the 5th spring (64) and the hole in large screw (63), and under the effect of the 5th spring (64), insert in the angle orientation hole (35) on adjustable plate (2), swivel nut (65) connects with large screw (63) by screw thread, large screw (63) connects with rotor plate (33) by screw thread.