CN211162960U - Leveling fixture - Google Patents

Abstract

The utility model provides a leveling clamp, which comprises a first lifting unit, wherein the first lifting unit comprises a first lifting unit supporting seat, an adjusting nut and an adjusting screw rod; and the second lifting unit comprises a second lifting unit supporting seat and an adjusting screw rod. The first adjusting unit is matched with the first lifting unit adjusting nut and the second lifting unit adjusting screw in the circumferential direction; and the second adjusting unit is matched with the first lifting unit in a circumferential direction to adjust the screw rod. When the first adjusting unit moves, the adjusting nut is driven to rotate, when the second adjusting unit moves, the adjusting screw rod is driven to rotate, then the adjusting nut or the adjusting screw rod is driven to move by adjusting the first adjusting unit or the second adjusting unit, finally the adjusting screw rod is enabled to do linear feeding movement, and the height of the workpiece contacting with the adjusting screw rod is adjusted.

Description

Leveling fixture

Technical Field

The utility model relates to a frock clamp field especially relates to a leveling anchor clamps.

Background

In the process of machine manufacturing and machining, a casting part is often required to be clamped and fixed so as to facilitate the machining procedures of milling, drilling, boring, turning and the like, when a non-standard part is required to be machined, the workpiece is often required to be clamped, leveled and adjusted in tool, and the posture and precision of the workpiece are not convenient to adjust after the clamping of the conventional clamp is completed, so that the machining and the production are not convenient.

SUMMERY OF THE UTILITY MODEL

In view of the above shortcomings of the prior art, an object of the present invention is to provide a leveling fixture for solving the problem that the fixture is not convenient for leveling a workpiece in the prior art.

To achieve the above and other related objects, the present invention provides a leveling fixture, including: the first lifting unit comprises a first lifting unit supporting seat, an adjusting nut and an adjusting screw rod, the circumferential direction of the adjusting nut is matched with the first lifting unit supporting seat, the adjusting screw rod respectively penetrates through the first lifting unit supporting seat and the adjusting nut, and the circumferential direction of the adjusting screw rod is matched with the adjusting nut; and the second lifting unit comprises a second lifting unit supporting seat and an adjusting screw rod, the adjusting screw rod penetrates through the second return lifting unit supporting seat, and the circumferential direction of the adjusting screw rod is matched with the second lifting unit supporting seat. The first adjusting unit is matched with the first lifting unit adjusting nut and the second lifting unit adjusting screw in the circumferential direction; and the second adjusting unit is matched with the first lifting unit in a circumferential direction to adjust the screw rod.

Optionally, the leveling fixture includes two first lifting units, one end of the second adjusting unit is circumferentially matched with the adjusting screw of one of the first lifting units, and the other end of the second adjusting unit is circumferentially matched with the adjusting screw of the other first lifting unit.

Optionally, a direction of a connection line between the two first lifting units is defined as a first direction, an extending direction of the second adjusting unit is defined as a second direction, the second direction is tangent to the adjusting screws of the two first lifting units, and the second direction is intersected with or out of plane with the first direction.

Optionally, the leveling fixture further includes a third adjusting unit, the third adjusting unit is matched with the second adjusting unit, and the circumference of the third adjusting unit is tangential to the second direction.

Optionally, the adjusting nut of the first adjusting unit includes a screw hole for matching with the adjusting screw, threads are arranged in the circumferential direction and the hole of the adjusting nut, the circumferential direction of the adjusting nut is connected with the first lifting unit supporting seat through threads, and the adjusting screw is connected with the screw hole of the adjusting nut through threads; the circumference of the adjusting screw rod of the second adjusting unit is provided with threads, and the circumference of the adjusting screw rod is connected with the second lifting unit supporting seat through threads.

Optionally, the first lifting unit adjusting nut is close to one end of the first adjusting unit is provided with a first gear, the second lifting unit adjusting screw is close to one end of the first adjusting unit is provided with a fifth gear, the first lifting unit adjusting screw is close to one end of the second adjusting unit is provided with a second gear, the first lifting unit adjusting nut and the second lifting unit adjusting screw are meshed with the first adjusting unit through gears, and the first lifting unit adjusting screw is meshed with the second adjusting unit through gears.

Optionally, the leveling anchor clamps include two first lifting unit, first regulating unit includes two regulating arms, two the extending direction of regulating arm is parallel, and two the regulating arm respectively with two the homonymy cooperation of first lifting unit adjusting nut, and a motion arm with the cooperation of the different side of second lifting unit adjusting screw.

Optionally, the first adjusting unit further includes moving arms, the moving arms are respectively connected to the two adjusting arms, the extending directions of the moving arms are respectively parallel to the extending directions of the two adjusting arms, and two sides of the moving arms are respectively matched with the fourth adjusting unit and the second lifting unit.

Optionally, the leveling fixture further includes a fourth adjusting unit and a second lifting unit, the fourth adjusting unit and the second lifting unit are disposed on two sides of the moving arm, and the circumferential directions of the fourth adjusting unit and the second lifting unit are tangent to the extending direction of the moving arm of the first adjusting unit.

As the above, the utility model discloses a leveling anchor clamps has following beneficial effect:

when the first adjusting unit moves, the first lifting unit adjusting nut and the second lifting unit adjusting screw rod are driven to rotate, when the second adjusting unit moves, the first lifting unit adjusting screw rod is driven to rotate, then the first adjusting unit or the second adjusting unit is adjusted to move, the adjusting nut or the adjusting screw rod is driven to move, finally the adjusting screw rod is made to perform linear feeding movement, and the height of the workpiece contacting with the adjusting screw rod is adjusted.

Drawings

Fig. 1 shows a schematic view of a main view structure of a leveling fixture according to an embodiment of the present invention.

Fig. 2 is a left side view of the structure of fig. 1.

Fig. 3 is a schematic top view of the structure of fig. 1.

Fig. 4 is a schematic top view of another portion of fig. 1.

Fig. 5 is a schematic structural diagram of a second adjusting unit.

Fig. 6 is a schematic structural diagram of the first lifting unit.

Fig. 7 is a schematic structural diagram of a third adjusting unit.

Fig. 8 is a schematic structural diagram of a fourth adjusting unit.

Fig. 9 is a schematic structural view of the second lifting unit.

Fig. 10 is a schematic structural diagram of the first adjusting unit.

Fig. 11 is a schematic diagram showing the relationship between the same-direction lifting of the first lifting unit and the opposite-direction lifting of the second lifting unit.

Fig. 12 is a schematic diagram showing the motion relationship of the first lifting unit in the reverse lifting direction.

Description of reference numerals

1 case body

11 clamp base

12 clamp cover plate

13 support rod

14 double-head screw

15 locating block

16 pressing plate

2 second regulating unit

20 second adjusting unit adjusting rod

21 second adjusting unit mounting seat

22 first rack

23 second rack

3 first elevating unit

31 first lifting unit support base

32 adjusting nut

33 adjusting screw

34 first gear

35 second gear

4 third regulating unit

41 third adjusting shaft

42 third gear

43 third adjusting unit connecting plate

5 fourth regulating Unit

51 fourth adjusting unit adjusting shaft

52 fourth gear

53 fourth regulating unit connecting plate

6 second lifting Unit

61 second lifting unit support base

62 second lifting unit adjusting screw

63 fifth gear

7 first adjusting unit

71 third rack

72 adjusting arm

73 arm for exercise

74 fourth rack

75 fifth rack

Detailed Description

The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein. The present invention can also be implemented or applied through other different specific embodiments, and various details in the present specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention.

Please refer to fig. 1 to 12. It should be noted that the drawings provided in the present embodiment are only for illustrating the basic idea of the invention in a schematic manner, and only the components related to the invention are shown in the drawings rather than being drawn according to the number, shape and size of the components in actual implementation, and the form, quantity and proportion of the components in actual implementation may be changed at will, and the layout of the components may be more complicated. The structure, ratio, size and the like shown in the drawings attached to the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by people familiar with the technology, and are not used for limiting the limit conditions which can be implemented by the present invention, so that the present invention does not have the substantial significance in the technology, and any structure modification, ratio relationship change or size adjustment should still fall within the scope which can be covered by the technical content disclosed by the present invention without affecting the efficacy which can be produced by the present invention and the purpose which can be achieved by the present invention. Meanwhile, the terms such as "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for convenience of description, and are not intended to limit the scope of the present invention, and changes or adjustments of the relative relationship thereof may be made without substantial technical changes, and the present invention is also regarded as the scope of the present invention.

Referring to fig. 1 to 4 and fig. 6, the present invention provides a leveling fixture, including: the first lifting unit 3 comprises a first lifting unit supporting seat 31, an adjusting nut 32 and an adjusting screw 33, the circumferential direction of the adjusting nut 32 is matched with the first lifting unit supporting seat 31, when the adjusting nut 32 rotates, the adjusting nut 32 moves relative to the first lifting unit supporting seat 31 along the self axial direction, the relative movement is linear movement, the adjusting screw 33 matched with the adjusting nut 32 is driven to move linearly, the adjusting screw 33 penetrates through the first lifting unit supporting seat 31 and the adjusting nut 32 respectively, the circumferential direction of the adjusting screw 33 is matched with the adjusting nut 32, when the adjusting screw 33 rotates, the adjusting screw 33 can be driven to move relative to the adjusting nut 32, and the adjusting screw 33 moves linearly along the self axial direction; a first adjusting unit 7, said first adjusting unit 7 cooperating with the circumference of said adjusting nut 32; the second adjusting unit 2, the second adjusting unit 2 with adjusting screw 33's circumference cooperation drives adjusting nut 32 to rotate when first adjusting unit 7 takes place to move, and when second adjusting unit 2 takes place to move, drives adjusting screw 33 and rotates, and then through adjusting first adjusting unit 7 or the motion of second adjusting unit 2, drives adjusting nut 32 or adjusting screw 33 and moves, finally makes adjusting screw 33 do the straight line feed motion, the adjustment with the height of adjusting screw 33 contact work piece.

The adjusting clamp also comprises a box body 1 consisting of 6 parts, wherein a clamp base 11 is arranged on a machine tool workbench and plays roles in mounting a part unit and pressing a workpiece together with a clamp cover plate 12; the supporting rod 13, the double-thread screw 14, the pressing plate 16 and the V-shaped positioning block 15 are arranged on the clamp cover plate 12 to press and position the workpiece.

In the course of the specific implementation,

referring to fig. 3, 5 and 6, the leveling fixture includes two first lifting units 3, one end of the second adjusting unit 2 is circumferentially engaged with an adjusting screw of one of the first lifting units 3, the other end of the second adjusting unit 2 is circumferentially engaged with an adjusting screw of the other first lifting unit 3, specifically, a direction of a connecting line between the two first lifting units 3 is defined as a first direction, an extending direction of the second adjusting unit 2 is defined as a second direction, the second direction is respectively tangent to the adjusting screws of the two first lifting units, the second direction is intersected with the first direction or is different from the first direction, when the second adjusting unit 2 rotates, two ends of the second adjusting unit 2 move and further respectively move relative to the adjusting screws of the two first lifting units 3, and the rotating directions of the adjusting screws of the two first lifting units 3 are opposite, and then the feeding directions of the two adjusting screws are opposite, so that the levelness of the workpiece is adjusted. Specifically, the second adjusting unit includes a second adjusting unit adjusting rod 20, a second adjusting unit mounting seat 21, a first rack 22 and a second rack 23, the second adjusting unit mounting seat 21 is fixed on the fixture base 11, two ends of the second adjusting unit adjusting rod 20 respectively penetrate through the second adjusting unit mounting seats 21 arranged at two ends of the second adjusting unit adjusting rod 20, two ends of the second adjusting unit adjusting rod 20 are respectively provided with a first rack 22 used for adjusting the first lifting unit, the first racks 22 at two ends of the second adjusting unit adjusting rod 20 are respectively arranged at two sides of the second adjusting unit adjusting rod 20, the second adjusting unit adjusting rod 20 is further provided with a second rack 23, and the second rack 23 is matched with a third adjusting unit 4 used for adjusting the second adjusting unit 2.

Referring to fig. 7, in order to facilitate adjusting the movement of the second adjusting unit 2, the leveling fixture further includes a third adjusting unit 4, the third adjusting unit 4 is matched with the second adjusting unit 2, a circumferential direction of the third adjusting unit 4 is tangential to the second direction (i.e., an extending direction of the second adjusting unit), when the third adjusting unit 4 is rotated, the second adjusting unit 2 moves along a plane where the second direction is located, and the second adjusting unit 2 drives the first lifting unit 3 to rotate. In the specific implementation process, the third adjusting unit 4 includes a third adjusting shaft 41, a third gear 42 and a third adjusting unit connecting plate 43, the third adjusting unit connecting plate 43 can be connected to the fixture base 11, the third adjusting shaft 41 and the third adjusting unit connecting plate 43 are connected in a rotating manner through a shaft/hole, the third gear 42 is disposed on the third adjusting shaft 41, the third adjusting shaft 41 can be rotated to drive the third gear 42 to rotate, so that the third adjusting unit 4 can adjust and control the second adjusting unit 2, in the implementation process, a scale can be disposed at the matching connection position of the third adjusting unit 4 and the box body 1, so as to control the rotation precision of the third adjusting unit 4, and further achieve the control of the lifting precision of the adjusting screw 33 of the first lifting unit 3.

Referring to fig. 6, the adjusting nut 32 includes a screw hole for engaging with the adjusting screw 33, threads are disposed in the circumferential direction and the hole of the adjusting nut 32, the circumferential direction of the adjusting nut 32 is in threaded connection with the first lifting unit support seat 31, and the adjusting screw 33 is in threaded connection with the screw hole of the adjusting nut 32, that is, in an actual use process, when the adjusting nut 32 is rotated, the adjusting nut 32 is in threaded engagement with the first lifting unit support seat 31, the adjusting nut 32 can perform a feeding motion relative to the first lifting unit support seat 31, and when the adjusting screw 33 is rotated, the adjusting screw 33 is in threaded engagement with the adjusting nut 32, and the adjusting screw 33 can perform a feeding motion relative to the adjusting nut 32, thereby achieving a feeding motion of the top of the adjusting screw and achieving a purpose of adjusting a relative position of a workpiece.

In a specific implementation process, a first gear 34 is arranged at one end, close to the first adjusting unit 7, of the adjusting nut 32, a second gear 35 is arranged at one end, close to the second adjusting unit 2, of the adjusting screw rod 33, the adjusting nut 32 is meshed with the first adjusting unit 7 through a gear, the adjusting screw rod 33 is meshed with the second adjusting unit 2 through a gear, the adjusting nut 32 is rotated through the first adjusting unit 7, the adjusting screw rod 33 is rotated through the second adjusting unit 2, feeding movement of the top of the adjusting screw rod 33 is achieved, and the purpose of adjusting the relative position of a workpiece is achieved.

Referring to fig. 10 and 11, in order to adjust the height and the levelness of the workpiece, the leveling fixture includes two first lifting units 3, the first adjusting unit 7 includes two adjusting arms 72, the extending directions of the two adjusting arms 72 are parallel, the two adjusting arms 72 are respectively matched with the same side of the adjusting nut 32, meanwhile, the moving arm 73 is matched with the same side of the adjusting screw 62 of the second lifting unit, when the first adjusting unit 7 moves along the extending direction of the adjusting unit 72, the first adjusting unit 7 drives the two first lifting units 3 to rotate in the same direction, so as to achieve the synchronous rising or lowering of the two first lifting units 3 and the lowering or rising of the second lifting unit.

In order to control the movement of the first adjusting unit 7, the first adjusting unit 7 further includes a moving arm 73, the moving arm 73 is respectively connected to the two adjusting arms 72, and the extending direction of the moving arm 73 is respectively parallel to the extending direction of the two adjusting arms, so as to drive the moving arm 73 to perform linear movement, that is, to simultaneously drive the two adjusting arms 72 to move, thereby realizing the synchronization of the adjustment of the first lifting unit 3 and the opposite adjustment of the second lifting unit 6 and the first lifting unit 3.

In order to facilitate the control of the moving arm 73, the leveling fixture further includes a fourth adjusting unit 5 and a second lifting unit 6, the fourth adjusting unit 5 and the second lifting unit 6 are respectively disposed at two sides of the moving arm 73, and the circumferential direction of the fourth adjusting unit 5 and the circumferential direction of the second lifting unit 6 are respectively tangent to the extending direction of the moving arm 73, the linear feeding motion of the first adjusting unit 7 is realized by adjusting the fourth adjusting unit 5, so as to ensure the linearity and precision of the motion of the first adjusting unit 7, in the specific implementation process, a third rack 71 is disposed at one end of the adjusting arm 72, which is matched with the first lifting unit 3, a fourth rack 74 and a fifth rack 75 are respectively disposed at positions of the moving arm 73, which correspond to the fourth adjusting unit 5 and the second lifting unit 6, and the fourth adjusting unit 5 and the fourth rack 74 are driven to be matched by rotating the fourth adjusting unit 5, to realize the movement of the moving arm 73, specifically, referring to fig. 8 and 9, the fourth adjusting unit 5 includes a fourth adjusting unit adjusting shaft 51, a fourth gear 52 and a fourth adjusting unit connecting plate 53, the fourth adjusting unit connecting plate 53 is disposed on the fixture base 11, the fourth adjusting unit adjusting shaft 51 and the fourth adjusting unit connecting plate 53 can be rotatably connected by means of hole-shaft fit, the fourth adjusting unit adjusting shaft 51 is provided with the fourth gear 52, the second lifting unit 6 includes a second lifting unit supporting seat 61, a second lifting unit screw 62 and a fifth gear 63, the second lifting unit supporting seat 61 is disposed on the fixture base 11, the second lifting unit supporting seat 61 and the second lifting unit screw 62 are rotatably connected by means of screw-thread fit, the second lifting unit screw 62 is provided with the fifth gear 63, during the adjusting process, the fourth gear 52 is engaged with the fourth rack 74, the fifth gear 63 is matched with the fifth rack 75, the fourth gear 52 is driven to be matched with the fourth rack 74 by rotating the fourth adjusting unit adjusting shaft 51, the purpose of driving the first adjusting unit 7 to move by adjusting the fourth adjusting unit adjusting shaft 51 is achieved, the second lifting unit screw 62 is lifted by driving the fifth gear 63 to be matched with the fifth rack 75, and the purpose of adjusting in the direction opposite to the adjusting direction of the first lifting unit 3 can be achieved.

Referring to fig. 11 and 12, the present invention further provides a leveling fixture control method, including:

providing at least two first lifting units, wherein in order to keep the levelness of the workpiece, the implementation process adopts two first lifting units and one second lifting unit;

the adjusting nuts 32 of the two leveling fixture first lifting units and the adjusting screw 62 of the second lifting unit rotate in the same direction, the adjusting nuts 32 of the first lifting units are matched with the adjusting screw 33, when the adjusting nuts 32 rotate, the adjusting screw 33 can be driven to do linear motion, the adjusting screws 33 of the two leveling fixture first lifting units move in the same direction along the axis direction of the adjusting screws, the adjusting screw 62 of the second lifting unit is matched with the supporting seat 61 of the second lifting unit, the adjusting screw 62 of the second lifting unit of one leveling fixture moves in the direction opposite to the adjusting screw 33 of the first lifting unit along the axis direction of the adjusting screw, and therefore synchronous lifting of the two first lifting units and synchronous lifting of the second lifting unit are achieved;

(rotating the adjusting screws 33 of the two leveling clamps in the same direction, matching the adjusting nuts 32 with the adjusting screws 33, when the adjusting screws 33 rotate, the adjusting screws 33 do linear motion relative to the adjusting nuts 32, and then the adjusting screws 33 of the two leveling clamps do the same direction along the axis direction thereof, so as to realize the synchronous lifting of the two first lifting units; it is stated that the transverse height adjustment of the workpiece can be realized only by adjusting the adjusting screws of the first lifting units in the reverse direction in the clamp)

Similarly, (the adjusting nuts 32 of two adjacent leveling fixtures are respectively adjusted reversely, and the adjusting screws 33 of two adjacent leveling fixtures move reversely along the axis direction of the adjusting nuts, so that one first lifting unit is lifted up or lowered down, and the other first lifting unit is lowered down or lifted up at the same time, which indicates that only the adjusting nuts of the first lifting units are adjusted in the same direction in the fixture, so that the longitudinal height adjustment of the workpiece can be realized); adjusting screw rods 33 of two adjacent leveling fixtures are respectively adjusted in opposite directions, and the adjusting screw rods 33 of the two adjacent leveling fixtures perform opposite movement along the axis direction of the adjusting screw rods, so that one first lifting unit is lifted or lowered, and the other first lifting unit is lowered or lifted at the same time.

In the specific implementation process, referring to fig. 11, when the fourth adjusting unit 5 rotates, the first adjusting unit 7 can be driven to generate a feeding motion, the first adjusting unit 7 is matched with the same sides of the adjusting nuts 32 of the two first lifting units, and when the first adjusting unit 7 feeds, the same sides of the two adjusting nuts 32 generate a relative motion in the same direction, and then the two adjusting nuts 32 drive the adjusting screw 33 to simultaneously lift or lower, and simultaneously generate a relative motion with the fifth gear 63 of the second lifting unit 6, so as to drive the adjusting screw 62 to simultaneously lift or lower.

Please refer to fig. 12, when the third adjusting unit 4 rotates, the third adjusting unit 4 can be matched with the second adjusting unit 2, and then two ends of the second adjusting unit 2 are respectively matched with the two adjusting screws 33, because the extending direction of the second adjusting unit 2 is intersected or out-of-plane with the connection line position relationship of the two first lifting units, the second adjusting unit 2 can drive the two first lifting units to move in opposite directions, so as to realize that one of the first lifting units is lifted or lowered, and the other one of the first lifting units is lowered or lifted.

The above embodiments are merely illustrative of the principles and effects of the present invention, and are not to be construed as limiting the invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.

Claims (9)

1. A leveling jig, comprising:

the first lifting unit comprises a first lifting unit supporting seat, an adjusting nut and an adjusting screw rod, the circumferential direction of the adjusting nut is matched with the first lifting unit supporting seat, the adjusting screw rod respectively penetrates through the first lifting unit supporting seat and the adjusting nut, and the circumferential direction of the adjusting screw rod is matched with the adjusting nut; the second lifting unit comprises a second lifting unit supporting seat and an adjusting screw rod, the adjusting screw rod penetrates through the second lifting unit supporting seat, and the circumferential direction of the adjusting screw rod is matched with the second lifting unit supporting seat;

the first adjusting unit is matched with the first lifting unit adjusting nut and the second lifting unit adjusting screw in the circumferential direction;

and the second adjusting unit is matched with the first lifting unit in a circumferential direction to adjust the screw rod.

2. The leveling fixture according to claim 1, wherein the leveling fixture comprises two first lifting units, one end of the second adjusting unit is circumferentially engaged with the adjusting screw of one of the first lifting units, and the other end of the second adjusting unit is circumferentially engaged with the adjusting screw of the other first lifting unit.

3. The leveling fixture according to claim 2, wherein a direction defining a connection line between the two first lifting units is a first direction, and a direction defining an extension direction of the second adjusting unit is a second direction, the second direction is tangent to the adjusting screws of the two first lifting units, respectively, and the second direction intersects with or is out of plane with the first direction.

4. The leveling fixture of claim 3, further comprising a third adjustment unit, the third adjustment unit cooperating with the second adjustment unit, and a circumference of the third adjustment unit being tangential to the second direction.

5. The leveling fixture according to claim 1, wherein the adjusting nut of the first adjusting unit comprises a screw hole for matching with the adjusting screw, threads are arranged in the circumferential direction and the hole of the adjusting nut, the circumferential direction of the adjusting nut is in threaded connection with the first lifting unit supporting seat, and the adjusting screw is in threaded connection with the screw hole of the adjusting nut; the circumference of the adjusting screw rod of the second adjusting unit is provided with threads, and the circumference of the adjusting screw rod is connected with the second lifting unit supporting seat through threads.

6. The leveling fixture according to claim 2, wherein a first gear is disposed at an end of the first lifting unit adjusting nut close to the first adjusting unit, a fifth gear is disposed at an end of the second lifting unit adjusting screw close to the first adjusting unit, a second gear is disposed at an end of the first lifting unit adjusting screw close to the second adjusting unit, the first lifting unit adjusting nut and the second lifting unit adjusting screw are engaged with the first adjusting unit through gears, and the first lifting unit adjusting screw is engaged with the second adjusting unit through gears.

7. The leveling fixture according to claim 1, wherein the leveling fixture comprises two first lifting units, the first adjusting unit comprises two adjusting arms, the extending directions of the two adjusting arms are parallel, the two adjusting arms are respectively matched with the same side of the adjusting nuts of the two first lifting units, and one moving arm is matched with the opposite side of the adjusting screw of the second lifting unit.

8. The leveling jig according to claim 7, wherein the first adjusting unit further comprises moving arms which are respectively connected to the two adjusting arms, and the extending directions of the moving arms are respectively parallel to the extending directions of the two adjusting arms, and both sides of the moving arms are respectively engaged with the fourth adjusting unit and the second lifting unit.

9. The leveling fixture according to claim 8, further comprising a fourth adjusting unit and a second lifting unit, wherein the fourth adjusting unit and the second lifting unit are disposed at both sides of the moving arm, and the circumferential directions of the fourth adjusting unit and the second lifting unit and the extending direction of the first adjusting unit and the moving arm are tangential.

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