CN220472541U - Adjustable preloaded lens rotating device - Google Patents

Abstract

The utility model discloses an adjustable preloaded lens rotating device, which comprises: the bottom plate, a lens bearing, a left side supporting piece and a right side mounting plate are arranged on the bottom plate; the lens support is provided with a measured lens, the right side mounting plate is connected with a small guide rail mounting plate, and the small guide rail mounting plate is connected with a rotating disc, a motor mounting seat and a rotating disc supporting rod; the rotary disc support rod is connected with the rotary disc, and the rotary disc can be driven to rotate by the rotary disc support rod; the left side support piece and the rotary disk are respectively positioned at the left side and the right side of the lens support, the left side support piece is provided with a clamp with an included angle, and the intersection point of the clamp is a deformation measuring point; the small guide rail mounting plate is provided with a mounting hole and a threaded auxiliary screw rod, an elastic plunger is placed in the mounting hole, the right side of the elastic plunger is contacted with the threaded auxiliary screw rod, and a threaded auxiliary nut is connected with the threaded auxiliary screw rod; the small guide rail mounting plate is connected with a pressure sensor in a contact way. The utility model realizes stable rotation of the lens and provides a better hardware foundation for eccentric measurement of the lens.

Description

Adjustable preloaded lens rotating device

Technical Field

The utility model relates to the technical field of lenses, in particular to an adjustable preloaded lens rotating device.

Background

The eccentric measuring system of the lens has higher requirements on mechanical hardware, and is mainly characterized in that the stability of rotation and support of the lens is directly influenced by the stability. An acceptable lens decentration is often on the order of um, so the support and rotation within the system should have as little effect on the lens as possible.

Therefore, there is a need for a device for rotating a lens that achieves good support for the lens and better stability.

Therefore, the adjustable preloaded lens rotating device solves the problem that the measurement is influenced by instability when the lens rotates.

Disclosure of Invention

The utility model aims to provide an adjustable preloaded lens rotating device, which is used for solving the problem that the measurement result is influenced by unstable rotation caused by the fact that the circumferential edges of lenses are rough and inconsistent and the sizes of the lenses are different during eccentric measurement.

In order to achieve the above purpose, the present utility model provides the following technical solutions: an adjustable preloaded lens turning device comprising: the bottom plate, a lens bearing, a left side supporting piece and a right side mounting plate are arranged on the bottom plate; the lens support is provided with a measured lens, the right side mounting plate can be close to or far away from the lens support, the right side mounting plate is connected with a small guide rail mounting plate, and the small guide rail mounting plate is connected with a rotating disc, a motor mounting seat and a rotating disc supporting rod; the rotary disc support rod is connected with the rotary disc, a rotary motor is installed and connected on the motor installation seat, and the rotary motor can drive the rotary disc to rotate;

the left side support piece and the rotary disk are respectively positioned at the left side and the right side of the lens support, the left side support piece is provided with a clamp with an included angle of 90 degrees, the intersection point of the clamp is a deformation measuring point, and the right side rotary disk can be close to or far from the lens support;

the small guide rail mounting plate is provided with a mounting hole and a threaded auxiliary screw rod, an elastic plunger is placed in the mounting hole, the left side of the elastic plunger is contacted with the motor mounting seat, the right side of the elastic plunger is contacted with the threaded auxiliary screw rod, the mounting hole is provided with a threaded auxiliary nut, the threaded auxiliary nut is connected with the threaded auxiliary screw rod, the threaded auxiliary nut is locked by a locking screw, and the small guide rail mounting plate is connected with the motor mounting seat by a gap adjusting screw;

the small guide rail mounting plate is connected with a pressure sensor in a contact way.

Further, the novel electric bicycle brake further comprises a locking spanner and a brake plate, wherein the locking spanner is installed through a slotted hole on the brake plate and a bottom plate, and a rotary disk supporting rod is arranged above the brake plate.

Further, a small guide rail is arranged on the small guide rail mounting plate, a small sliding block is arranged on the small guide rail, a small sliding block connecting plate is sleeved on the small sliding block, the small sliding block connecting plate is connected with a rotating disc supporting rod in a mounting manner, and a right rotating disc is connected with the rotating disc supporting rod through a bearing.

Further, the device also comprises a fifth X slipway fixing seat, a fifth X slipway and a pressure sensor mounting plate, wherein the fifth X slipway is arranged on the fifth X slipway fixing seat, the pressure sensor mounting plate is arranged on the fifth X slipway, the pressure sensor is arranged on the pressure sensor mounting plate, and the pressure sensor is in contact with the small guide rail mounting plate.

Further, the output shaft of the rotating motor is provided with a belt driving wheel, and the rotating disk is connected with the belt driving wheel through a belt, so that the rotating disk is driven to rotate when the rotating motor rotates.

Further, still include left side support piece mounting panel, slip table connecting plate, third X slip table and fourth X slip table, left side support piece passes through the locking knob to be installed on left side support piece mounting panel, and left side support piece mounting panel is installed on third X slip table, and third X slip table and fourth X slip table cross sliding direction are installed, and fourth X slip table is installed on the slip table connecting plate, and the slip table connecting plate is installed on the bottom plate.

Further, the device also comprises a large guide rail and a large sliding block, wherein the large guide rail is arranged on the bottom plate, the large sliding block is slidably arranged on the large guide rail, and the right side mounting plate is arranged on the large sliding block.

Further, still include backup pad, first X slip table and second X slip table, install the backup pad on the right side connecting plate, install the second X slip table in the backup pad, first X slip table and the installation of second X slip table cross sliding direction install, install little guide rail mounting panel on the first X slip table.

Compared with the prior art, the utility model has the beneficial effects that:

the structure of the utility model can realize stable rotation of the lens, reduce radial runout and axial runout of the lens, and provide a better hardware foundation for eccentric measurement of the lens.

Drawings

FIG. 1 is a partial structural top view of an embodiment of the present utility model;

FIG. 2 is a cross-sectional view of the portion F-F of FIG. 1;

FIG. 3 is a front view of an embodiment of the present utility model;

FIG. 4 is a right side view of an embodiment of the present utility model;

FIG. 5 is a perspective view of an embodiment of the present utility model;

FIG. 6 is another perspective view of an embodiment of the present utility model;

FIG. 7 is a perspective view of a part of the structure of an embodiment of the present utility model;

in the figure: 1-large guide rail, 2-large slide block, 3-locking knob, 4-lens bearing, 5-rotating motor, 6-first X slipway, 7-small guide rail mounting plate, 8-second X slipway, 9-bottom plate, 10-rotating disk supporting rod, 11-brake block, 12-third X slipway, 13-deformation measuring point, 14-measured lens, 15-rotating disk, 16-small slide block, 17-small slide block connecting plate, 18-small guide rail, 19-supporting plate, 20-fourth X slipway, 21-left side supporting member mounting plate, 22-slipway connecting plate, 23-left side supporting member, 24-belt, 25-right side connecting plate, 26-locking spanner, 27-elastic plunger, 28-locking screw, 29-threaded pair nut, 30-threaded pair screw, 31-length record, 32-fifth X slipway, 33-pressure sensor mounting plate, 34-fifth X fixing seat, 35-pressure sensor, 36-gap adjusting screw, 37-motor mounting seat, 38-belt driving wheel.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1-7, the present utility model provides a technical solution: an adjustable preloaded lens rotating device is provided, which is characterized in that the device comprises: the bottom plate 9, a lens bearing 4 arranged on the bottom plate 9, a left side supporting piece 23 and a right side mounting plate 25; the lens support 4 is provided with a measured lens 14, the right side mounting plate 25 can be close to or far away from the lens support 4, the right side mounting plate 25 is connected with a small guide rail mounting plate 7, and the small guide rail mounting plate 7 is connected with a rotating disc 15, a motor mounting seat 37 and a rotating disc supporting rod 10; the rotary disc support rod 10 is rotationally connected with the rotary disc 15; the motor mounting seat 37 is provided with a rotary motor 5, and the rotary motor 5 can drive the rotary disk 15 to rotate;

the left support piece 23 and the rotary disk 15 are respectively positioned at the left side and the right side of the lens support 4, a clamp with an included angle of 90 degrees is arranged on the left support piece 23, a deformation measuring point 13 is arranged at the intersection point of the clamp, and the right rotary disk 15 can be close to or far from the lens support 4;

the small guide rail mounting plate 7 is provided with a mounting hole and a threaded auxiliary screw 30, an elastic plunger 27 is placed in the mounting hole, the left side of the elastic plunger 27 is in contact with a motor mounting seat 37, the right side of the elastic plunger 27 is in contact with the threaded auxiliary screw 30, the mounting hole is provided with a threaded auxiliary nut 29, the threaded auxiliary nut 29 is connected with the threaded auxiliary screw 30, the threaded auxiliary nut 29 is locked by a locking screw 28, and the small guide rail mounting plate 7 is connected with the motor mounting seat 37 by a gap adjusting screw 36;

the small rail mounting plate 7 is connected with a pressure sensor 35 in contact.

The length record 31 is a record of the length of the threaded sub-screw 30; the first X slipway 6 to the fifth X slipway 32 are all provided with micrometer, namely are common slipways with micrometer.

Further, in order to enable the right rotary disk 15 to move relative to the small guide rail mounting plate 7, the right rotary disk 15 can be close to or far away from the lens support 4, a small guide rail 18 is mounted on the small guide rail mounting plate 7, a small sliding block 16 is mounted on the small guide rail 18, a small sliding block connecting plate 17 is sleeved on the small sliding block 16, the small sliding block connecting plate 17 is mounted and connected with the rotary disk supporting rod 10, and the right rotary disk 15 is connected with the rotary disk supporting rod 10 through a bearing. The small slide block connecting plate 17 comprises a similar hollow cylinder part and a supporting frame connected with the similar hollow cylinder part, the small slide block connecting plate 17 is similar to a mouth, the similar cylinder part is sleeved outside the small guide rail 18 and the small slide block 16, the similar cylinder part is sleeved and contacted with the small slide block 16, the supporting frame is connected with the rotary disk supporting rod 10, and the rotary disk supporting rod 10 is connected with the rotary disk 15.

Further, a motor mounting seat 37 is mounted and connected on the rotary disc support rod 10, a rotary motor 5 is mounted and connected on the motor mounting seat 37, a belt driving wheel 38 is mounted and connected on an output shaft of the rotary motor 5, and the rotary disc 15 is connected with the belt driving wheel 38 through a belt 24, so that the rotary disc 15 is driven to rotate when the rotary motor 5 rotates; the right rotary disk 15 is positioned on the right side of the measured lens 1 and is used for driving the measured lens 1 to rotate around the center of the measured lens 1 around the measured lens 14.

Further, in order to make the pressure sensor 35 contact with the small guide rail mounting plate 7, the device further comprises a fifth X slipway fixing seat 34, a fifth X slipway 32 and a mounting pressure sensor mounting plate 33, wherein the fifth X slipway fixing seat 34 is provided with the fifth X slipway 32, the fifth X slipway 32 is provided with the pressure sensor mounting plate 33, the pressure sensor mounting plate 33 is provided with the pressure sensor 35, and the pressure sensor 35 contacts with the small guide rail mounting plate 7. The pressure sensor 35 can be close to or far away from the small guide rail mounting plate 7 through the fifth X sliding table 32, the right side mounting plate 25 and the rotary disk 15 can be close to or far away from the lens support 4, the position of the small guide rail mounting plate 7 also changes, and the pressure sensor mounting plate 33 can be adjusted and driven through the fifth X sliding table 32 according to the requirement, so that the pressure sensor 35 is in contact with the small guide rail mounting plate 7.

Further, in order to make the rotary motor 5 drive the rotary disk 15 to rotate, a belt driving wheel 38 is mounted on the output shaft of the rotary motor 5, and the rotary disk 15 and the belt driving wheel 38 are connected by a belt 24, so that the rotary disk 15 is driven to rotate when the rotary motor 5 rotates.

Further, in order to prevent the rotary disk 15 from sliding, a locking wrench 26 and a brake plate 11 are further included, the locking wrench 26 is installed through a slot hole on the brake plate 11 and the bottom plate 9, and the rotary disk support bar 10 is disposed above the brake plate 11. The rotary disk support bar 10 is disposed above the brake plate 11, and the rotary disk support bar 10 is not in contact with the brake plate 11 but is just above it, but is just above it in position, actually is mounted above the right-side connection plate 25, and then the large slide 2 is immobilized, and the locking wrench 26 immobilizes the large slide 2 through the brake plate 11.

Further, in order to enable the left side support 23 to approach or depart from the lens support 4, the bottom plate 9 is provided with a third X sliding table 12, a fourth X sliding table 20, a left side support mounting plate 21 and a sliding table connecting plate 22; the slipway connecting plate 22 is installed on the bottom plate 9, and the X slipway IV 20 is installed on the slipway connecting plate 22.

Further, in order to be able to perform fine adjustment on the left side supporting member 23, the device further comprises a left side supporting member mounting plate 21, a sliding table connecting plate 22, a third X sliding table 12 and a fourth X sliding table 20, the left side supporting member 23 is mounted on the left side supporting member mounting plate 21 through a locking knob 3, the left side supporting member mounting plate 21 is mounted on the third X sliding table 12, the third X sliding table 12 and the fourth X sliding table 20 are mounted in a sliding direction intersecting with each other, the fourth X sliding table 20 is mounted on the sliding table connecting plate 22, the sliding table connecting plate 22 is mounted on the bottom plate 9, the above base plate 9 is removed to be called a left side assembly, the left side assembly is a plurality of components on the left side of the lens support 4, the assembly is characterized by high rigidity, rough adjustment and fine adjustment are performed, slotted holes are formed in the sliding table connecting plate 22, mounting holes are formed in corresponding positions in the bottom plate 9, and the rough adjustment is achieved by moving the relative positions of the slotted holes in the sliding table connecting plate 22 and the two rows of mounting holes located at the same positions on the bottom plate 9 and the left side supporting member mounting plate 21. The fine tuning is achieved by rotating the micrometer head on the third X slipway 12. Meanwhile, the fourth X slipway 20 can adjust the up and down position of the left side support 23 shown in fig. 5. The left support piece 23 is positioned at the left side of the measured lens 14 and is used for providing stable support for the measured lens 1, and the horizontal center of the left support piece 23 and the rotation center of the measured lens 14 can be adjusted to the same horizontal line by adjusting the fourth X sliding table 20, so that the support force provided by the left support piece 23 to the measured lens 14 is uniform; the third X slide table 12 and the fourth X slide table 20 control the movement of the left support 23 in the left-right direction and the up-down direction, respectively, and fine adjustment is performed.

Further, in order to be able to move the rotary disk 15, still contain big guide rail 1 and big slider 2, be equipped with big guide rail 1 on the bottom plate 9, slidable mounting has big slider 2 on the big guide rail 1, be equipped with right side mounting panel 25 on the big slider 2, install backup pad 19 on the right side connecting plate 25, install second X slip table 8 on the backup pad 19, first X slip table 6 and second X slip table 8 cross sliding direction install, install little guide rail mounting panel 7 on the first X slip table 6, install little guide rail 18 on the little guide rail mounting panel 7, install little slider 16 on the little guide rail 18, cover is established on the little slider 16 and is installed little slider connecting plate 17, on little slider connecting plate 17 installs and connects rotary disk bracing piece 10. The cross sliding direction mounting means that one of the sliding directions of the first X slide table 6 and the second X slide table 8 is a left-right direction and the other is an up-down direction.

Further, in order to be able to finely tune the rotary table 15, the rotary table further comprises a support plate 19, a first X sliding table 6 and a second X sliding table 8, the support plate 19 is installed on the right-side connecting plate 25, the second X sliding table 8 is installed on the support plate 19, the first X sliding table 6 and the second X sliding table 8 are installed in a cross sliding direction, and the small guide rail installation plate 7 is installed on the first X sliding table 6. The first X slide table 6 and the second X slide table 8 can move in the left-right direction and the up-down direction of the small rail mounting plate 7, respectively, and fine adjustment is performed.

The small guide rail mounting plate 7 is provided with a mounting hole, an elastic plunger 27 is placed in the mounting hole, the left side of the elastic plunger 27 is in contact with a motor mounting seat 37, the right side of the elastic plunger 27 is in contact with a screw thread auxiliary screw 30, a screw thread auxiliary nut 29 is mounted in the mounting hole, the screw thread auxiliary nut 29 is connected with the screw thread auxiliary screw 30, a locking screw 28 locks the screw thread auxiliary nut 29, and a gap adjusting screw 36 is connected with the small guide rail mounting plate 7 and the motor mounting seat 37. This connection allows for adjustment of the gap between the motor mount 37 and the small rail mount plate 7 while preventing the small slider 16 from disengaging the small rail 18.

The elastic plunger 27 is placed in the illustrated hole of the small guide rail mounting plate 7, the left side of the elastic plunger 27 is contacted with the motor mounting seat 37, the right side of the elastic plunger 27 is contacted with the threaded auxiliary screw 30, meanwhile, the threaded auxiliary nut 29 is connected with the threaded auxiliary screw 30, and the threaded auxiliary nut 29 is mounted in the hole of the small guide rail mounting plate 7 and locked by the locking screw 28. The gap adjusting screw 36 connects the small rail mounting plate 7 and the motor mounting seat 37, and this connection can adjust the gap between the motor mounting seat 37 and the small rail mounting plate 7 while preventing the small slider 16 from being separated from the small rail 18.

In this example: as shown in fig. 1, the lens 14 to be measured is placed on the lens holder 4, the left support 23 limits the movement of the lens 14 to the left and provides support, the right rotating disk 15 limits the movement of the lens to the right and provides support, when the locking wrench 26 is locked, the right connecting plate 25 cannot slide left and right, and at the same time, because a gap is left between the motor mounting seat 37 and the small guide rail mounting plate 7 and is supported by the elastic plunger 27, the rotating disk 15 can slide left and right through the small slider 16 on the small guide rail 18, and because the elastic plunger 27 is supported elastically to the left, the rotating disk 15 receives an elastic force to the left when moving to the right, and therefore, the rotating disk 15 always returns to the left each time the rotating disk 15 slides to the right.

As shown in fig. 2, the elastic plunger 27 is pushed to the left by the screw pair 30, and the gap width between the motor mount 37 and the small rail mount 7 is fixed by the gap adjusting screw 36, so that the screw pair 30 is rotated, and if the screw pair 30 is rotated clockwise, the screw pair 30 moves to the left, so that the elastic plunger 27 is compressed to the left, and in the case of the gap width being fixed, the elastic force in the unit gap increases, and in the same way, the elastic force in the unit gap decreases when the screw pair 30 is rotated counterclockwise. The rebound preload of the rotary disk 15 is thus changed by adjusting the front-to-rear position of the threaded secondary screw 30.

As shown in fig. 1 and 2, after the pressure sensor 35 contacts with the small guide rail mounting plate 7 and the locking wrench 26 is loosened, the large slide block 2 can slide on the large guide rail 1, so that the rotating disk 15 can be driven to move leftwards or rightwards, the fifth X slide table 32 is adjusted to move leftwards to contact and rotate the rotating disk 15 with the lens, meanwhile, the dial gauge measuring head is contacted with the deformation measuring point 13, continuous measurement is needed during the period that the rotating disk 15 drives the measured lens 14 to rotate, at the moment, the contact force between the rotating disk 15 and the lens is changed by adjusting the left and right movement of the fifth X slide table 32, and at the moment, the reading on the dial gauge is observed, at the moment, because of rebound preload of the rotating disk 15 is adjusted, the condition that the reading possibly jumps exists, and the reading of the pressure sensor is recorded when the absolute value range of the reading is smaller than 5 um. This operation is used to confirm the amount of force with which the rotating disk 15 contacts the lens 14 under test when the rotating disk 15 is capable of rotating the lens. At this time, the rebound preload of the rotary disk 15 is changed by adjusting the screw pair screw 30, when the reading jump of the dial indicator is smaller than 1um, the value of the length 31 at this time is recorded, namely, the distance from the right end face of the screw pair nut 29 to the left end face of the screw pair screw 30 screwed by hand is measured by using a vernier caliper, the reading of the pressure sensor is a changed value, namely, the reading jump of the dial indicator is converted into the reading jump of the right pressure sensor during the previous measurement, and the reading of the pressure sensor at this time is recorded, and the maximum value on the pressure sensor at this time is recorded because the elastic plunger 27 absorbs the uneven force brought by the measured lens 14, and the value is subtracted to obtain the reading of the pressure sensor before the adjustment preload, namely, the preload required for eliminating the jump during the rotation of the measured lens 14 is measured. And replacing lenses with different diameters, testing and recording the readings of the pressure sensor and the length record 31 respectively by a plurality of groups, and recording a plurality of groups of data to finally obtain the most suitable adjustment quantity corresponding to the length record 31 so as to adapt to the lenses with different calibers.

Further, the preload adjustment can be adapted to lenses of different calibers, and the finished X slipway provides good rigid support to serve as a reference for the whole system. When the deformation amount is acceptable, the position of the length record 31 at the moment and the reading of the pressure sensor are recorded, lenses with different diameters are replaced, a plurality of groups of tests are performed, the length of the length record 31 is adjusted, a plurality of groups of data are recorded, and finally the most suitable adjustment amount of the length record 31 is obtained to adapt to lenses with different calibers.

Further, by replacing the left supporting member 23, the fitting can be made according to the size of the lens, so that the shape of the contact portion between the left supporting member 23 and the lens in the drawing is 90 degrees, and the included angle formed by the connection between the two tangent points of the lens and the center of the circle is at least 90 degrees, the clamps are 90 degrees, then the sizes are different, and the sizes of the clamps are determined according to the sizes of the diameters of the lenses, as described above, the basis of determining the sizes of the clamps is that the included angle between the two tangent points of the different sizes is greater than 90 degrees, meaning that the two straight lines with 90 degrees and fixed side lengths are tangent, when the circle is greater, the included angle formed by the two tangent points to the center of the circle is smaller, so that the lens is required to be supported stably enough, otherwise, when the diameter of the circle is determined, the lengths of the two straight lines are changed, and the clamps with certain lengths can be adapted to the lens with certain diameters so that the included angle between the two tangent points and the center of the circle is greater than or equal to 90 degrees. Meanwhile, the lens supporting clamping fixture with different calibers can support the measurement of the lens with the diameter of 6mm-100 mm. The right side rotary drive disc supports the lens to achieve an adjustable preload of 0-1N.

Measuring the decentration of the lens requires rotating the lens and stably supporting the lens without significant radial and axial runout, and the left side supporting reference should be more rigid. However, when the support rigidity on the left side is good enough, the turntable for driving the lens to rotate needs to be capable of providing good support and adapting to radial runout caused by irregularities of the outer circle of the lens, so that the preload is required to be adjusted in real time according to the actual situation of the edge of the lens while the preload on the right side is applied to the lens. The axial runout of the lens is realized, so that the lens is firmly adsorbed on the mould for placing the lens through negative pressure vacuum.

The structure of the utility model can realize stable rotation of the lens, reduce radial runout and axial runout of the lens, and provide a better hardware foundation for eccentric measurement of the lens.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims (8)

1. An adjustable preloaded lens turning device comprising: the lens support comprises a bottom plate (9), a lens support (4) arranged on the bottom plate (9), a left side supporting piece (23) and a right side mounting plate (25); the lens support (4) is provided with a measured lens (14), the right side mounting plate (25) can be close to or far away from the lens support (4), the right side mounting plate (25) is connected with a small guide rail mounting plate (7), and the small guide rail mounting plate (7) is connected with a rotating disc (15), a motor mounting seat (37) and a rotating disc supporting rod (10); the rotary disc support rod (10) is connected with the rotary disc (15), the motor mounting seat (37) is provided with a rotary motor (5), and the rotary motor (5) can drive the rotary disc (15) to rotate;

the left side supporting piece (23) and the rotary disk (15) are respectively positioned at the left side and the right side of the lens support (4), a clamp with an included angle of 90 degrees is arranged on the left side supporting piece (23), a deformation measuring point (13) is arranged at the intersection point of the clamp, and the right side rotary disk (15) can be close to or far from the lens support (4);

the small guide rail mounting plate (7) is provided with a mounting hole and a threaded auxiliary screw (30), an elastic plunger (27) is placed in the mounting hole, the left side of the elastic plunger (27) is in contact with a motor mounting seat (37), the right side of the elastic plunger (27) is in contact with the threaded auxiliary screw (30), a threaded auxiliary nut (29) is mounted in the mounting hole, the threaded auxiliary nut (29) is connected with the threaded auxiliary screw (30), the threaded auxiliary nut (29) is locked through a locking screw (28), and the small guide rail mounting plate (7) is connected with the motor mounting seat (37) through a gap adjusting screw (36);

the small guide rail mounting plate (7) is connected with a pressure sensor (35) in a contact way.

2. The adjustable preloaded lens turning device of claim 1 wherein: the novel brake device further comprises a locking spanner (26) and a brake plate (11), wherein the locking spanner (26) penetrates through a slotted hole in the brake plate (11) and is installed on the bottom plate (9), and the rotary disc supporting rod (10) is arranged above the brake plate (11).

3. The adjustable preloaded lens turning device according to claim 1 or 2, characterized in that: a small guide rail (18) is arranged on the small guide rail mounting plate (7), a small sliding block (16) is arranged on the small guide rail (18), a small sliding block connecting plate (17) is sleeved on the small sliding block (16), the small sliding block connecting plate (17) is connected with the rotary disc supporting rod (10) in a mounting manner, and the rotary disc (15) on the right side is connected with the rotary disc supporting rod (10) through a bearing.

4. The adjustable preloaded lens turning device of claim 3 wherein: the device further comprises a fifth X slipway fixing seat (34), a fifth X slipway (32) and a mounting pressure sensor mounting plate (33), wherein the fifth X slipway fixing seat (34) is provided with the fifth X slipway (32), the fifth X slipway (32) is provided with the pressure sensor mounting plate (33), the pressure sensor mounting plate (33) is provided with a pressure sensor (35), and the pressure sensor (35) is in contact with the small guide rail mounting plate (7).

5. The adjustable preloaded lens turning device of claim 3 wherein: the output shaft of the rotating motor (5) is connected with a belt driving wheel (38), and the rotating disc (15) is connected with the belt driving wheel (38) through a belt (24), so that the rotating disc (15) is driven to rotate when the rotating motor (5) rotates.

6. The adjustable preloaded lens turning device of claim 1 wherein: still include left side support piece mounting panel (21), slip table connecting plate (22), third X slip table (12) and fourth X slip table (20), left side support piece (23) are installed on left side support piece mounting panel (21) through locking knob (3), left side support piece mounting panel (21) are installed on third X slip table (12), third X slip table (12) and fourth X slip table (20) cross sliding direction installation, fourth X slip table (20) are installed on slip table connecting plate (22), slip table connecting plate (22) are installed on bottom plate (9).

7. The adjustable preloaded lens turning device of claim 1 wherein: the large-size sliding type automobile engine further comprises a large guide rail (1) and a large sliding block (2), the large guide rail (1) is arranged on the bottom plate (9), the large sliding block (2) is slidably mounted on the large guide rail (1), and the right side mounting plate (25) is arranged on the large sliding block (2).

8. The adjustable preloaded lens turning device of claim 7 wherein: still include backup pad (19), first X slip table (6) and second X slip table (8), install backup pad (19) on right side connecting plate (25), install second X slip table (8) on backup pad (19), install in first X slip table (6) and second X slip table (8) cross sliding direction, install little guide rail mounting panel (7) on first X slip table (6).