A leveling fixture and control method thereof

Abstract

The present invention provides a leveling fixture and a control method thereof, wherein the leveling fixture comprises a first lifting unit, wherein the first lifting unit comprises a first lifting unit support seat, an adjusting nut, and an adjusting screw; and a second lifting unit, wherein the second lifting unit comprises a second lifting unit support seat and an adjusting screw. The first adjusting unit comprises a circumferential cooperation with the first lifting unit adjusting nut and the second lifting unit adjusting screw; and the second adjusting unit comprises a circumferential cooperation with the first lifting unit adjusting screw. When the first adjusting unit moves, the adjusting nut is driven to rotate, and when the second adjusting unit moves, the adjusting screw is driven to rotate, and then the adjusting nut or the adjusting screw is driven to move by adjusting the movement of the first adjusting unit or the second adjusting unit, and finally the adjusting screw performs a linear feed movement to adjust the height of the workpiece in contact with the adjusting screw.

Description

Technical Field

[0001] The invention relates to the field of tooling fixtures, and in particular to a leveling fixture and a control method thereof. Background Art

[0002] In the process of mechanical manufacturing and processing, castings often need to be clamped and fixed to facilitate milling, drilling, boring, turning and other processing procedures. When non-standard parts need to be processed, the workpiece often needs to be clamped, leveled and tool aligned. However, the current fixtures are not convenient for adjusting the posture and accuracy of the workpiece after clamping, which makes processing and production inconvenient. Summary of the invention

[0003] In view of the above-mentioned shortcomings of the prior art, an object of the present invention is to provide a leveling fixture and a control method thereof, so as to solve the problem that the fixture in the prior art is inconvenient for leveling a workpiece.

[0004] To achieve the above-mentioned purpose and other related purposes, the present invention provides a leveling fixture, including: a first lifting unit, the first lifting unit includes a first lifting unit support seat, an adjusting nut, and an adjusting screw, the circumference of the adjusting nut matches with the first lifting unit support seat, the adjusting screw passes through the first lifting unit support seat and the adjusting nut respectively, and the circumference of the adjusting screw matches with the adjusting nut; a second lifting unit, the second lifting unit includes a second lifting unit support seat and an adjusting screw, the adjusting screw passes through the second lifting unit support seat, and the circumference of the adjusting screw matches with the second lifting unit support seat. The first adjusting unit, the first adjusting unit matches with the circumference of the first lifting unit adjusting nut and the second lifting unit adjusting screw; the second adjusting unit, the second adjusting unit matches with the circumference of the first lifting unit adjusting screw.

[0005] Optionally, the leveling fixture includes two first lifting units, one end of the second adjusting unit cooperates with the circumference of the adjusting screw of one of the first lifting units, and the other end of the second adjusting unit cooperates with the circumference of the adjusting screw of the other first lifting unit.

[0006] Optionally, the direction of the line between the two first lifting units is defined as the first direction, and the extension direction of the second adjustment unit is defined as the second direction, the second direction is respectively tangent to the adjustment screws of the two first lifting units, and the second direction intersects or is not in the same plane as the first direction.

[0007] Optionally, the leveling fixture further includes a third adjusting unit, the third adjusting unit cooperates with the second adjusting unit, and a circumference of the third adjusting unit is tangent to the second direction.

[0008] Optionally, the adjusting nut of the first adjusting unit includes a screw hole for matching the adjusting screw, the adjusting nut is provided with threads on the circumference and in the hole, the adjusting nut is threadedly connected to the first lifting unit support seat on the circumference, and the adjusting screw is threadedly connected to the screw hole of the adjusting nut; the adjusting screw of the second adjusting unit is provided with threads on the circumference, and the adjusting screw is threadedly connected to the second lifting unit support seat on the circumference.

[0009] Optionally, a first gear is provided at one end of the first lifting unit adjusting nut close to the first adjusting unit, a fifth gear is provided at one end of the second lifting unit adjusting screw close to the first adjusting unit, a second gear is provided at one 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 meshed with the first adjusting unit through gears, and the first lifting unit adjusting screw is also meshed with the second adjusting unit through gears.

[0010] Optionally, the leveling clamp includes two of the first lifting units, the first adjustment unit includes two adjustment arms, the extension directions of the two adjustment arms are parallel, and the two adjustment arms respectively cooperate with the same side of the two adjustment nuts of the first lifting units, and a moving arm cooperates with the opposite side of the adjustment screw of the second lifting unit.

[0011] Optionally, the first adjustment unit also includes a moving arm, which is connected to the two adjustment arms respectively, and the extension direction of the moving arm is parallel to the extension direction of the two adjustment arms respectively, and the two sides of the moving arm cooperate with the fourth adjustment unit and the second lifting unit respectively.

[0012] 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 arranged on both sides of the moving arm, and the circumferential direction of the fourth adjusting unit and the second lifting unit is tangent to the extension direction of the first adjusting unit and the moving arm.

[0013] A method for controlling a leveling clamp comprises: providing the leveling clamp; rotating the adjusting nuts of two leveling clamps of a first lifting unit in the same direction, so that at least two adjusting screws of the leveling clamps move in the same direction along their own axis directions; rotating the adjusting screws of the two leveling clamps of the first lifting unit in different directions, so that at least two adjusting screws of the leveling clamps move in the opposite direction along their own axis directions; respectively adjusting the adjusting nuts of the two leveling clamps of the first lifting unit and the adjusting screw of the second lifting unit in the same direction, so that the adjusting screws of the two groups of leveling clamps of the first lifting unit and the second lifting unit move in the opposite direction along their own axis directions; respectively adjusting the adjusting screws of two adjacent leveling clamps in the opposite direction, so that the adjusting screws of the two adjacent leveling clamps move in the opposite direction along their own axis directions.

[0014] As described above, the leveling fixture and control method thereof of the present invention have the following beneficial effects:

[0015] When the first adjusting unit moves, it drives the adjusting nut of the first lifting unit and the adjusting screw of the second lifting unit to rotate. When the second adjusting unit moves, it drives the adjusting screw of the first lifting unit to rotate. Then, by adjusting the movement of the first adjusting unit or the second adjusting unit, the adjusting nut or the adjusting screw is driven to move, and finally the adjusting screw makes a linear feed motion to adjust the height of the workpiece in contact with the adjusting screw. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Shown is a schematic diagram of the front view structure of the leveling fixture in an embodiment of the present invention.

[0017] Figure 2 Display as Figure 1 Schematic diagram of the left view structure.

[0018] Figure 3 Display as Figure 1 Schematic diagram of the partial top view structure.

[0019] Figure 4 Display as Figure 1 Another partial top view schematic diagram of the structure.

[0020] Figure 5 Shown is a schematic diagram of the structure of the second adjustment unit.

[0021] Figure 6 Shown is a schematic diagram of the structure of the first lifting unit.

[0022] Figure 7 Shown is a schematic diagram of the structure of the third adjustment unit.

[0023] Figure 8 Shown is a schematic diagram of the structure of the fourth adjustment unit.

[0024] Fig. 9 Shown is a schematic diagram of the structure of the second lifting unit.

[0025] Fig.10 Shown is a schematic diagram of the structure of the first adjustment unit.

[0026] Fig.11 It is a schematic diagram showing the motion relationship between the first lifting unit lifting in the same direction and the second lifting unit lifting in the opposite direction.

[0027] Fig.12 It is a schematic diagram showing the motion relationship of the first lifting unit lifting in reverse.

[0028] Part Number Description

[0029] 1 Cabinet

[0030] 11 Clamp base

[0031] 12 Fixture cover

[0032] 13 Support rod

[0033] 14 Double-head screw

[0034] 15 Positioning block

[0035] 16 Pressure plate

[0036] 2 Second adjustment unit

[0037] 20 Second adjustment unit adjustment lever

[0038] 21 Second adjustment unit mounting seat

[0039] 22 First rack

[0040] 23 Second rack

[0041] 3 First lifting unit

[0042] 31 First lifting unit support seat

[0043] 32 Adjusting nut

[0044] 33 Adjusting screw

[0045] 34 First Gear

[0046] 35 Second gear

[0047] 4 Third adjustment unit

[0048] 41 Third adjustment axis

[0049] 42 Third gear

[0050] 43 Third adjustment unit connecting plate

[0051] 5 Fourth adjustment unit

[0052] 51 Fourth adjustment unit adjustment shaft

[0053] 52 Fourth Gear

[0054] 53 Fourth adjustment unit connecting plate

[0055] 6 Second lifting unit

[0056] 61 Second lifting unit support seat

[0057] 62 Second lifting unit adjustment screw

[0058] 63 Fifth Gear

[0059] 7 First adjustment unit

[0060] 71 Third rack

[0061] 72 Adjustment arm

[0062] 73 Sports Arm

[0063] 74 Fourth rack

[0064] 75 Fifth rack DETAILED DESCRIPTION

[0065] The following describes the embodiments of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention.

[0066] See also Figures 1 to 12 It should be noted that the diagrams provided in the present embodiment only illustrate the basic concept of the present invention in a schematic manner, so the diagrams only show the components related to the present invention rather than drawing according to the number, shape and size of the components in actual implementation. The type, quantity and proportion of each component in actual implementation can be changed at will, and the component layout type may also be more complicated. The structure, proportion, size, etc. shown in the drawings attached to this specification are only used to match the content disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions that the present invention can be implemented, so they have no technical substantive significance. Any modification of the structure, change of the proportional relationship or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the effect and purpose that the present invention can produce. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. The change or adjustment of the relative relationship should also be regarded as the scope of the implementation of the present invention without substantially changing the technical content.

[0067] See also Figures 1 to 4 as well as Figure 6The present invention provides a leveling fixture, including: a first lifting unit 3, the first lifting unit 3 includes a first lifting unit support seat 31, an adjusting nut 32, and an adjusting screw 33, the circumference of the adjusting nut 32 cooperates with the first lifting unit support seat 31, when the adjusting nut 32 rotates, the adjusting nut 32 moves relative to the first lifting unit support seat 31 along its own axis, and this relative motion is a linear motion, thereby driving the adjusting screw 33 that cooperates with the adjusting nut 32 to do linear motion, the adjusting screw 33 respectively penetrates the first lifting unit support seat 31 and the adjusting nut 32, and the circumference of the adjusting screw 33 cooperates with the adjusting nut 32, when the adjusting screw 33 rotates , which can drive the adjusting screw 33 and the adjusting nut 32 to move relative to each other, and then the adjusting screw 33 makes a linear motion along its own axis; the first adjusting unit 7, the first adjusting unit 7 is circumferentially matched with the adjusting nut 32; the second adjusting unit 2, the second adjusting unit 2 is circumferentially matched with the adjusting screw 33, when the first adjusting unit 7 moves, it drives the adjusting nut 32 to rotate, and when the second adjusting unit 2 moves, it drives the adjusting screw 33 to rotate, and then by adjusting the movement of the first adjusting unit 7 or the second adjusting unit 2, the adjusting nut 32 or the adjusting screw 33 is driven to move, and finally the adjusting screw 33 makes a linear feed motion to adjust the height of the workpiece in contact with the adjusting screw 33.

[0068] The adjusting fixture also includes a box body 1, which is composed of 6 parts. The fixture base 11 is installed on the machine tool workbench and together with the fixture cover 12, it is responsible for the installation of the part unit and the clamping of the workpiece; the support rod 13, the double-headed screw 14, the pressure plate 16, and the V-shaped positioning block 15 are installed on the fixture cover 12 to clamp and position the workpiece.

[0069] In the specific implementation process,

[0070] See also Figure 3 , 5and 6, the leveling fixture includes two of the first lifting units 3, one end of the second adjusting unit 2 is circumferentially matched with the adjusting screw of one of the first lifting units 3, and the other end of the second adjusting unit 2 is circumferentially matched with the adjusting screw of the other first lifting unit 3. Specifically, the direction of the line between the two first lifting units 3 is defined as the first direction, and the extending direction of the second adjusting unit 2 is defined as the second direction. The second directions are tangent to the adjusting screws of the two first lifting units respectively, and the second directions are intersecting or skewed with the first directions. When the second adjusting unit 2 rotates, the two ends of the second adjusting unit 2 move, and then move relative to the adjusting screws of the two first lifting units 3 respectively. The rotation directions of the adjusting screws in the two first lifting units 3 are opposite, and then the feeding directions of the two adjusting screws are opposite, thereby completing the adjustment of the horizontality of the workpiece. 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 clamp base 11. The two ends of the second adjusting unit adjusting rod 20 respectively pass through the second adjusting unit mounting seats 21 arranged at both ends thereof. The two ends of the second adjusting unit adjusting rod 20 are respectively provided with a first rack 22 for adjusting the first lifting unit, and the first racks 22 at both ends of the second adjusting unit adjusting rod 20 are respectively arranged on both sides of the second adjusting unit adjusting rod 20. A second rack 23 is also provided on the second adjusting unit adjusting rod 20, and the second rack 23 cooperates with the third adjusting unit 4 for adjusting the second adjusting unit 2.

[0071] See also Figure 7 In order to facilitate the adjustment of the movement of the second adjustment unit 2, the leveling fixture further includes a third adjustment unit 4, the third adjustment unit 4 cooperates with the second adjustment unit 2, and the circumference of the third unit 4 is tangent to the second direction (i.e., the extension direction of the second adjustment unit). When the third unit 4 is rotated, the second adjustment unit 2 moves along the plane where the second direction is located, and then the second unit 2 drives the first lifting unit 3 to rotate. In the specific implementation process, the third adjustment unit 4 includes a third adjustment shaft 41, a third gear 42 and a third adjustment unit connecting plate 43. The third adjustment unit connecting plate 43 can be connected to the fixture base 11. The third adjustment shaft 41 and the third adjustment unit connecting plate 43 are rotatably connected through an axis / hole, and a third gear 42 is provided on the third adjustment shaft 41. Rotating the third adjustment shaft 41 can drive the third gear 42 to rotate, thereby realizing the adjustment and control of the second adjustment unit 2 by the third adjustment unit 4. In the implementation process, a scale can be set at the joint between the third adjustment unit 4 and the box body 1 to control the rotation accuracy of the third adjustment unit 4, thereby achieving the control of the lifting accuracy of the adjustment screw 33 of the first lifting unit 3.

[0072] See also Figure 6The adjusting nut 32 includes a screw hole for matching the adjusting screw 33. The adjusting nut 32 is provided with threads in the circumference and in the hole. The adjusting nut 32 is connected to the first lifting unit support seat 31 in the circumference by threads, and the adjusting screw 33 is connected to the screw hole of the adjusting nut 32 by threads. That is, in actual use, when the adjusting nut 32 is rotated, the adjusting nut 32 is threadedly matched with the first lifting unit support seat 31, and the adjusting nut 32 can make a feeding motion relative to the first lifting unit support seat 31. When the adjusting screw 33 is rotated, the adjusting screw 33 is threadedly matched with the adjusting nut 32, and the adjusting screw 33 can make a feeding motion relative to the adjusting nut 32, thereby realizing the feeding motion of the top of the adjusting screw and achieving the purpose of adjusting the relative position of the workpiece.

[0073] During the specific implementation process, a first gear 34 is provided at one end of the adjusting nut 32 close to the first adjusting unit 7, and a second gear 35 is provided at one end of the adjusting screw 33 close to the second adjusting unit 2. The adjusting nut 32 is meshed with the first adjusting unit 7 through gears, and the adjusting screw 33 is also meshed with the second adjusting unit 2 through gears. The adjusting nut 32 is rotated by the first adjusting unit 7, and the adjusting screw 33 is rotated by the second adjusting unit 2, so as to realize the feeding movement of the top of the adjusting screw 33 and achieve the purpose of adjusting the relative position of the workpiece.

[0074] See also Fig.10 and Fig.11 In order to facilitate the adjustment of the height and horizontality of the workpiece, the leveling fixture includes two of the first lifting units 3, and the first adjusting unit 7 includes two adjusting arms 72. The extension directions of the two adjusting arms 72 are parallel, and the two adjusting arms 72 are respectively matched with the same side of the adjusting nut 32, and the moving arm 73 is matched with the same side of the second lifting unit adjusting screw 62. When the first adjusting unit 7 moves along the extension direction of the adjusting unit 72, the first adjusting unit 7 drives the two first lifting units 3 to rotate in the same direction, thereby realizing the synchronous raising or lowering of the two first lifting units 3 and the lowering or raising of the second lifting unit.

[0075] In order to facilitate the control of the movement of the first adjusting unit 7, the first adjusting unit 7 also includes a moving arm 73, and the moving arm 73 is respectively connected to the two adjusting arms 72, and the extension direction of the moving arm 73 is respectively parallel to the extension direction of the two adjusting arms. Driving the moving arm 73 to make linear motion can simultaneously drive the two adjusting arms 72 to move, thereby realizing the adjustment synchronization of the first lifting unit 3 and the opposite adjustment of the second lifting unit 6 and the first lifting unit 3.

[0076] In order to facilitate the control of the moving arm 73, the leveling fixture also includes a fourth adjusting unit 5 and a second lifting unit 6, and the fourth adjusting unit 5 and the second lifting unit 6 are respectively arranged on both 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 extension direction of the moving arm 73. The linear feed movement of the first adjusting unit 7 is achieved by adjusting the fourth adjusting unit 5, and the linearity and accuracy of the movement of the first adjusting unit 7 are guaranteed. In the specific implementation process, the end of the adjusting arm 72 that cooperates with the first lifting unit 3 is provided with a third rack 71, and the positions of the moving arm 73 corresponding to the fourth adjusting unit 5 and the second lifting unit 6 are respectively provided with a fourth rack 74 and a fifth rack 75. The fourth adjusting unit 5 is rotated to drive the cooperation between the fourth adjusting unit 5 and the fourth rack 74 to achieve the movement of the moving arm 73. For details, please refer to Figure 8 and Fig. 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 arranged on the fixture base 11, the fourth adjusting unit adjusting shaft 51 and the fourth adjusting unit connecting plate 53 can be matched in a hole-shaft manner to realize rotation connection, and the fourth adjusting unit adjusting shaft 51 is provided with a 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 arranged on the fixture base 11, the second lifting unit supporting seat 61 and the second lifting unit screw The rod 62 is rotatably connected through threaded cooperation, and a fifth gear 63 is provided on the second lifting unit screw 62. During the adjustment process, the fourth gear 52 cooperates with the fourth rack 74, and the fifth gear 63 cooperates with the fifth rack 75. The fourth gear 52 is driven to cooperate with the fourth rack 74 by rotating the fourth adjustment unit adjustment shaft 51, so as to achieve the purpose of driving the first adjustment unit 7 to move by adjusting the fourth adjustment unit adjustment shaft 51. By driving the fifth gear 63 to cooperate with the fifth rack 75, the lifting and lowering of the second lifting unit screw 62 is achieved, thereby achieving the purpose of adjusting in the opposite direction to the first lifting unit 3.

[0077] See also Fig.11 and Fig.12 The present invention also provides a leveling fixture control method, comprising:

[0078] Provide at least two of the first lifting units. In order to maintain the horizontality of the workpiece, the present implementation process uses two first lifting units and one second lifting unit;

[0079] The adjusting nuts 32 of the two first lifting units of the leveling fixture and the adjusting screw 62 of the second lifting unit are rotated in the same direction. The adjusting nut 32 of the first lifting unit cooperates with the adjusting screw 33. When the adjusting nut 32 rotates, it can drive the adjusting screw 33 to move linearly. The adjusting screws 33 of the two first lifting units of the leveling fixture move in the same direction along their own axis directions. The adjusting screw 62 of the second lifting unit cooperates with the second lifting unit support seat 61. The adjusting screw 62 of the second lifting unit of the leveling fixture moves in the opposite direction to the adjusting screw 33 of the first lifting unit along its own axis direction, thereby realizing the synchronous lifting and lowering of the two first lifting units and the synchronous lifting and lowering of the one second lifting unit.

[0080] (The adjusting screws 33 of the two leveling fixtures are rotated in the same direction, and the adjusting nut 32 cooperates with the adjusting screw 33. When the adjusting screw 33 rotates, the adjusting screw 33 moves linearly relative to the adjusting nut 32, and then the adjusting screws 33 of the two leveling fixtures move in the same direction along their own axis directions, thereby realizing the synchronous lifting of the two first lifting units; Note: In this fixture, only by adjusting the adjusting screws of the first lifting unit in the opposite direction can the lateral height adjustment of the workpiece be realized)

[0081] Similarly, (adjust the adjusting nuts 32 of two adjacent leveling clamps in reverse order, and the adjusting screws 33 of two adjacent leveling clamps move in reverse order along their own axial lines, so that one of the first lifting units is raised or lowered, and the other first lifting unit is lowered or raised at the same time. Note: in this clamp, only by adjusting the adjusting nuts of the first lifting units in the same direction can the longitudinal height adjustment of the workpiece be achieved); adjust the adjusting screws 33 of two adjacent leveling clamps in reverse order, and the adjusting screws 33 of two adjacent leveling clamps move in reverse order along their own axial lines, so that one of the first lifting units is raised or lowered, and the other first lifting unit is lowered or raised at the same time.

[0082] In the specific implementation process, please refer to Fig.11 When the fourth adjusting unit 5 rotates, it can drive the first adjusting unit 7 to generate a feeding motion. The first adjusting unit 7 cooperates with the same side of the adjusting nuts 32 of the two first lifting units. When the first adjusting unit 7 is fed, the same side of the two adjusting nuts 32 undergo relative motion in the same direction. Then, the two adjusting nuts 32 drive the adjusting screw 33 to rise or fall at the same time, and at the same time, they undergo relative motion with the fifth gear 63 of the second lifting unit 6, thereby driving the adjusting screw 62 to rise or fall at the same time.

[0083] Please refer to 12. When the third adjusting unit 4 rotates, the third adjusting unit 4 can cooperate with the second adjusting unit 2, and then the two ends of the second adjusting unit 2 cooperate with the two adjusting screws 33 respectively. Since the extension direction of the second adjusting unit 2 is intersecting or skewed with the position relationship of the connection line of the two first lifting units, the second adjusting unit 2 can drive the two first lifting units to move in the opposite direction, so that one of the first lifting units is raised or lowered, and the other first lifting unit is lowered or raised.

[0084] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. A leveling fixture, characterized in that: include: Two first lifting units, wherein the first lifting unit comprises a first lifting unit support seat, an adjusting nut, and an adjusting screw, wherein the circumference of the adjusting nut matches with the first lifting unit support seat, the adjusting screw respectively passes through the first lifting unit support seat and the adjusting nut, and the circumference of the adjusting screw matches with the adjusting nut; A second lifting unit, the second lifting unit comprising a second lifting unit support seat and an adjusting screw, the adjusting screw passes through the second lifting unit support seat, and the circumference of the adjusting screw is matched with the second lifting unit support seat; The adjusting nut of the first lifting unit includes a screw hole for matching the adjusting screw, the adjusting nut is provided with threads on its circumference and in its hole, the adjusting nut is connected to the first lifting unit support seat on its circumference by threads, and the adjusting screw is connected to the screw hole of the adjusting nut by threads; the adjusting screw of the second lifting unit is provided with threads on its circumference, and the adjusting screw is connected to the second lifting unit support seat on its circumference by threads; A first adjustment unit, the first adjustment unit is circumferentially matched with the first lifting unit adjustment nut and the second lifting unit adjustment screw, the first adjustment unit includes two adjustment arms, the extension directions of the two adjustment arms are parallel, and the two adjustment arms are respectively matched with the same side of the two first lifting unit adjustment nuts, and a moving arm is matched with the same side of the second lifting unit adjustment screw, the first adjustment unit also includes a moving arm, the moving arm is respectively connected to the two adjustment arms, and the extension direction of the moving arm is respectively parallel to the extension direction of the two adjustment arms; A second adjusting unit, wherein the second adjusting unit is circumferentially matched with the adjusting screw of the first lifting unit, 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; a third adjusting unit, the third adjusting unit cooperating with the second adjusting unit; The second adjustment unit comprises a second adjustment unit adjustment rod, a second adjustment unit mounting seat, a first rack and a second rack, the second adjustment unit mounting seat is fixed to the fixture base, two ends of the second adjustment unit adjustment rod respectively penetrate the second adjustment unit mounting seats arranged at two ends thereof, two ends of the second adjustment unit adjustment rod are respectively provided with a first rack for adjusting the first lifting unit, and the first racks at two ends of the second adjustment unit adjustment rod are respectively arranged on both sides of the second adjustment unit adjustment rod, the second adjustment unit adjustment rod is also provided with a second rack, and the second rack cooperates with a third adjustment unit for adjusting the second adjustment unit; The direction of the line between the two first lifting units is defined as the first direction, and the extending direction of the second adjustment unit is defined as the second direction. The second direction is tangent to the adjustment screws of the two first lifting units respectively, and the second direction intersects or is not in the same plane as the first direction.

2. The leveling fixture according to claim 1, characterized in that: A circumferential direction of the third adjustment unit is tangent to the second direction.

3. The leveling fixture according to claim 1, characterized in that: A first gear is provided at one end of the first lifting unit adjusting nut close to the first adjusting unit, a fifth gear is provided at one end of the second lifting unit adjusting screw close to the first adjusting unit, a second gear is provided at one 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 meshed with the first adjusting unit through gears, and the first lifting unit adjusting screw is also meshed with the second adjusting unit through gears.

4. The leveling fixture according to claim 1, characterized in that: The leveling fixture also includes a fourth adjusting unit, and both sides of the moving arm cooperate with the fourth adjusting unit and the second lifting unit respectively. The fourth adjusting unit and the second lifting unit are arranged on both sides of the moving arm, and the circumferential direction of the fourth adjusting unit and the second lifting unit is tangent to the extension direction of the first adjusting unit and the moving arm.

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