High-precision multidimensional adjustment device

Abstract

The application discloses a high-precision multi-dimensional adjusting device, which comprises a base, at least one shaft hole, a vertical hole corresponding to each shaft hole, a screw gear shaft matched with the shaft hole, a gear section of the screw gear shaft, a nut installed on a threaded section of the screw gear shaft, a toothed section of each rack screw, a nut installed on a threaded section of the rack screw, a toothed section of each rack screw, a toothed section of each rack screw, a toothed section of each rack screw, a toothed section of each rack screw, a toothed section of each rack screw, a toothed section of each rack screw, a toothed section of each rack screw, a toothed section of each rack screw, a toothed section of each rack screw, a toothed section of each rack screw, a toothed section of each rack screw, a toothed section of each rack screw, a toothed section of each rack screw, a toothed section of each rack screw, a toothed section of each rack screw, a toothed section of each rack screw, a toothed section of each rack screw, a toothed section of each rack screw, a toothed section of each rack screw, a toothed section of each rack screw, a toothed section of each rack screw, a toothed section of each rack screw, a toothed section of each rack screw, a toothed section of each rack screw, a toothed section of each rack screw, a toothed section of each rack screw, a toothed section of each rack screw, a toothed section of each rack screw, a toothed section of each rack screw, a toothed section of each rack screw, a toothed section of each rack screw, a toothed section of each rack screw, a toothed section of each rack screw, a toothed section of each rack screw, a toothed section of each rack screw, a toothed section of each rack screw, a toothed section of each rack screw, a toothed section of each rack screw, a toothed section of each rack screw, a toothed section of each rack screw, a toothed section of each rack screw, a toothed section of each rack screw, a toothed section of each rack screw, a toothed section of each rack screw, a toothed section of each rack screw, a toothed section of each rack screw, a toothed section of each rack screw, a toothed section of each rack screw, a toothed section of each rack screw, a toothed section of each rack screw, a toothed section of each rack screw, a

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of the distal end aiming support adjustment of femoral intramedullary nail locking screw, and particularly relates to a multi-dimensional adjustment device for aiming the distal end of intramedullary nail. BACKGROUND

[0002] At present, femoral intramedullary nail is used for the fracture of femoral part in clinic, which is a minimally invasive treatment method for femoral fracture. After the intramedullary nail is implanted into the bone, a certain degree of deformation occurs, and the distal end locking is often difficult. In order to reduce the difficulty of distal end locking, a mechanical aiming device is generally used to improve the success rate of locking. However, the basic principle of the mechanical aiming device used at present is to adjust the deviation of the aiming device through the positioning rod, and the first-time locking success rate in actual clinical application is not high, and multiple drilling is required to be successful. The deviation of the aiming device is adjusted through the positioning rod, which is a fixed device and cannot be adjusted again. However, after the positioning rod is adjusted, the deviation occurs when drilling, and the locking difficulty occurs when drilling.

[0003] During the operation, the skin at the fracture site is cut open, and in order to reduce the wound area and achieve minimally invasive, a smaller wound is cut open, the required femoral end is inserted into the intramedullary nail, and then the distal end of the intramedullary nail is fixed by the locking screw. Because the femoral part has a large curvature, and the bone plate is below the skin surface, it cannot be visually measured, so the position of the corresponding locking screw hole cannot be accurately found. Because the intramedullary nail is a high-technology requirement for treating femoral fracture, it has not been fully developed, and one of the difficulties is the difficulty of distal end locking. At present, there are various aiming devices (manual aiming, mechanical aiming, magnetic navigation), and there are still many deficiencies.

[0004] Among the existing various intramedullary nail distal aiming instruments, most of them adopt fixed connection of positioning aiming instrument at the proximal end (exposed end) of the intramedullary nail, and the positioning aiming instrument is constrained by the proximal end of the intramedullary nail to ensure that the position and direction of the positioning hole of the distal end of the intramedullary nail (located in the medullary cavity) correspond to those of the aiming instrument, for example, the interlocking intramedullary nail distal locking screw aiming device with publication number CN109223150 A and the light-transmitting intramedullary nail distal locking screw aiming device with publication number CN108272499 A, which correspond the position and direction of the distal end fixing hole of the intramedullary nail to the positioning hole on the aiming device in design. When the intramedullary nail is inserted into the medullary cavity, the corresponding positioning hole on the aiming device is drilled into fixation from the outside. This kind of technical solution corresponds the distal end fixing hole of the intramedullary nail to the positioning hole of the aiming device completely before the intramedullary nail enters the medullary cavity. However, the intramedullary nail is slender, and after entering the medullary cavity, the distal end of the intramedullary nail may be deformed due to the compression of the two ends of the fracture, especially for the intramedullary nail for femur, the distal end of which may be moderately curved and deformed, causing the positioning hole of the aiming device to substantially deviate from the distal end fixing hole of the intramedullary nail, so as to cause the problem of hole drilling deviation, affecting the smooth progress of the operation. This kind of aiming device cannot be adjusted arbitrarily under the condition of fluoroscopy, leading to locking difficulty, and can only be applied to the intramedullary nail without deformation under the condition of fluoroscopy, so the application range is limited. SUMMARY

[0005] The present application aims at the problems of the existing intramedullary nail aiming device, such as more adjustment nodes, more structural components, large error between the gaps of the components, tedious adjustment, long adjustment time under X-ray environment, etc., and provides a multi-dimensional adjustment device with high integration, compact structure, high precision fitting degree, small error and convenient adjustment, so as to improve the adjustment efficiency and precision.

[0006] The technical solution for achieving the above-mentioned purpose is to adopt a high-precision multi-dimensional adjustment device, which comprises a base, a screw gear shaft, an axial non-falling nut, a rack screw and a turning non-falling nut. The base comprises a shaft hole and another hole perpendicular to the shaft hole, and the two holes intersect, which is called a vertical connection hole. The screw gear shaft comprises a threaded section at the first section and a gear section at the tail section. After the screw gear shaft is matched and fitted in the shaft hole, the gear section is located at the intersection of the two holes. The axial non-falling nut is installed on the threaded section of the screw gear shaft, and the nut is provided with a non-falling structure one at the first end of the shaft hole. The rack screw is a rod body with threads on the outside, and the threads on one side are flattened along the axial direction to form a rack part. The turning non-falling nut is installed on the threaded section of the rack screw, and the nut is provided with a non-falling structure two at the first end of the vertical connection hole. After the rack screw is matched and fitted in the vertical connection hole, the rack part is engaged with the gear section of the screw gear shaft, and a constraint structure is arranged to prevent the rack screw from rotating.

[0007] The application discloses a high-precision multi-dimensional adjusting device which comprises a base, a screw gear shaft, axial non-falling nuts, rack screws and turning non-falling nuts; the base comprises two shaft through holes which are perpendicular to each other and each of which is provided with a vertical hole; the screw gear shaft comprises a threaded section at the head and a gear section at the tail; the two screw gear shafts are matched and installed in the corresponding shaft through holes respectively, and the gear section of each screw gear shaft is located at the intersection of the corresponding shaft through hole and the vertical hole; the two axial non-falling nuts are installed on the threaded sections of the screw gear shafts respectively, and each axial non-falling nut is provided with a non-falling structure one at the head of the corresponding shaft through hole; the two rack screws are rod bodies with threads on the outer sides, and the threads on one side of each rack screw are axially flattened to form a rack section; the two turning non-falling nuts are installed on the threaded sections of the corresponding rack screws respectively, and each turning non-falling nut is provided with a non-falling structure two at the head of the corresponding vertical hole; the two rack screws are matched and installed in the corresponding vertical holes respectively, and the rack sections are engaged with the gear sections of the corresponding screw gear shafts; and a constraint structure for preventing the rotation of the rack screws is arranged.

[0008] The application discloses a high-precision multi-dimensional adjusting device which comprises a base, a screw gear shaft, axial non-falling nuts, rack screws and turning non-falling nuts; the base comprises two shaft through holes which are perpendicular to each other and each of which is provided with a vertical hole; the screw gear shaft comprises a threaded section at the head and a gear section at the tail; the two screw gear shafts are matched and installed in the corresponding shaft through holes respectively, and the gear section of each screw gear shaft is located at the intersection of the corresponding shaft through hole and the vertical hole; the two axial non-falling nuts are installed on the threaded sections of the screw gear shafts respectively, and each axial non-falling nut is provided with a non-falling structure one at the head of the corresponding shaft through hole; the two rack screws are rod bodies with threads on the outer sides, and the threads on one side of each rack screw are axially flattened to form a rack section; the two turning non-falling nuts are installed on the threaded sections of the corresponding rack screws respectively, and each turning non-falling nut is provided with a non-falling structure two at the head of the corresponding vertical hole; the two rack screws are matched and installed in the corresponding vertical holes respectively, and the rack sections are engaged with the gear sections of the corresponding screw gear shafts; and a constraint structure for preventing the rotation of the rack screws is arranged.

[0009] When the axial non-falling nuts are rotated, the rack sections of the rack screws restrict the gear sections of the screw gear shafts, so that the screw gear shafts can only be adjusted in the axial direction; when the turning non-falling nuts are rotated, the rack screws are driven to move in the axial direction and push the gear sections of the screw gear shafts to rotate, so that the base can be adjusted in the rotating direction relative to the screw gear shafts.

[0010] The non-falling structure is a U-shaped dovetail groove arranged on the side wall of the base at the position of the corresponding hole, and the end of the non-falling nut is provided with a convex ring; the convex ring of the corresponding non-falling nut is installed from the slot opening to the slot bottom of the U-shaped dovetail groove.

[0011] A matching patch is also fixedly installed in the notch of the U-shaped dovetail groove, used to match and block the non-falling nut, preventing the corresponding nut from falling off.

[0012] The constraint structure for preventing the rack screw from rotating is a planar constraint component matched with the plane of the rack part arranged on the inner wall of the through hole at the rack part side, used to prevent the rotation thereof, or a recess is arranged along the generatrix on the side surface of the rack screw, and a locking pin inserted into the recess is arranged on the inner wall of the through hole, used to prevent the rotation thereof.

[0013] An eccentric adjusting sleeve is matched and sleeved in the vertical hole, the inner cavity of the tube body of the eccentric adjusting sleeve is an eccentric cavity, the end of the tube body has a clearance groove area formed by a side notch, and the gear segment of the rack gear shaft is matched with the clearance groove area. One side of the clearance groove area has a straight groove bottom surface, and the other side has an arc groove bottom surface.

[0014] Advantages:

[0015] 1. Independent axial adjustment and angle adjustment in multiple dimensions can be realized. The adjustment operation becomes simple and easy to use. The adjustment mode is simplified to facilitate adjustment, which can significantly improve the adjustment efficiency, reduce the adjustment time exposed to X-rays, protect the safety of patients and medical staff. It saves valuable time for surgery, ensures success at one time, improves surgery speed, reduces complications, greatly reduces the number of fluoroscopy, and reduces the impact of radiation.

[0016] 2. The structure is compact and reasonable, simplified, and optimally designed. The number of components is minimized to avoid the problem of large error accumulation and large error caused by the gap between components. The multiple-dimensional adjustment is integrated into the square box, which has the advantages of high integration, precise structure, and easy adjustment, reduces the number of nodes of the multi-dimensional adjustment support, and thus avoids the error factors caused by the gap between multiple components as much as possible, and improves the precision.

[0017] 3. The axial non-falling nut is sleeved in the U-shaped dovetail groove on the shell, which does not affect the relative rotation of the shell shaft during axial adjustment and angle adjustment.

[0018] 4. When the nut on the gear shaft rotates, the gear shaft can only move axially under the guidance, ensuring that the rack and the gear are always engaged. The engagement of the rack screw and the gear shaft is equivalent to axial guidance, which ensures that the axial movement is translation and ensures that the shaft does not rotate, eliminating the need for other structure components to constrain the rotation or guidance of the shaft.

[0019] 5. When the nut on the rack screw shaft rotates, the rack screw shaft moves axially, and under the engagement condition with the gear shaft, the gear shaft achieves the rotation effect.

[0020] 6. The function of the eccentric sleeve is to improve the reasonable gap between the gear and the rack. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is the overall appearance structure diagram of the present application.

[0022] Figure 2 is the internal structure diagram of the present application. Figure 1

[0023] Figure 3 is the front view of the present application. Figure 1

[0024] Figure 4 is the bottom view of the present application Figure 1

[0025] Figure 5 is the A-A sectional structure diagram of the present application. Figure 3

[0026] Figure 6 is the B-B sectional structure diagram of the present application. Figure 3

[0027] Figure 7 is the appearance structure diagram of the four-dimensional control seat.

[0028] Figure 8 is the M1 face front view of the present application. Figure 7

[0029] Figure 9 is the M4 face front view of the present application. Figure 7

[0030] Figure 10 is the M6 face front view of the present application. Figure 7

[0031] Figure 11 is the M3 face front view of the present application. Figure 7

[0032] Figure 12 is the C-C sectional structure diagram of the present application. Figure 10

[0033] Figure 13 is the D-D sectional structure diagram of the present application. Figure 9

[0034] Figure 14 is the E-E sectional structure diagram of the present application. Figure 9

[0035] Figure 15 is the structure diagram of the screw gear shaft one.

[0036] Figure 16 is the structure diagram of the rack screw.

[0037] Figure 17 is the structure diagram of the screw gear shaft two.

[0038] ​​​​​​​​​​​​Figure 18 is the structure diagram of eccentric adjusting sleeve.

[0039] Figure 19 is the structure diagram of non-falling nut.

[0040] Figure 20 is the structure diagram of patch.

[0041] Figure label: four-dimensional control seat 1, screw gear shaft one 2, positioning nut 3, axial non-falling nut one 4a, axial non-falling nut two 4b, rack screw one 5, screw gear shaft two 6, eccentric adjusting sleeve 7, steering non-falling nut one 8a, steering non-falling nut two 8b, rack screw two 9, patch one 10, patch two 11, process hole on shaft sleeve 12, saddle screw 13, positioning pin 14, vertical shaft hole 15a, horizontal shaft hole 15b, vertical hole one 16a, vertical hole two 16b, U-shaped dovetail groove 17, convex ring 18, arc step area 19, threaded segment 21, gear segment 22, rack part 51, threaded segment 61, gear segment 62, pipe body 71, give way groove area 72, straight groove bottom surface 73, arc groove bottom surface 74, eccentric cavity 75. DETAILED DESCRIPTION

[0042] Example 1: as shown in the four-dimensional adjusting device, it can be seen from the figure that the device includes four-dimensional control seat 1, screw gear shaft one 2, positioning nut 3, axial non-falling nut one 4a, axial non-falling nut two 4b, rack screw one 5, screw gear shaft two 6, eccentric adjusting sleeve 7, steering non-falling nut one 8a, steering non-falling nut two 8b and rack screw two 9, and patch, etc. Specifically, the structure of the device and the cooperation relationship of each part can also be understood from multiple sides and the inside respectively. Figure 1 Figures 3-6 The specific structure of the four-dimensional control seat 1 involved in the device can be seen from , and each figure details the side and internal hole position relationship of the four-dimensional control seat 1. It can be seen from the figure that the four-dimensional control seat 1 includes two shaft holes, i.e. vertical shaft hole 15a and horizontal shaft hole 15b. Two vertical holes, i.e. vertical hole one 16a and vertical hole two 16b. It can be seen that the two shaft holes are perpendicular to each other. Each vertical hole is perpendicular to and partially communicates with the corresponding shaft hole. The hole position relationship of each partially communicating hole can be seen from

[0043] , Figures 7-14 and Figure 12 . Figure 13 Figure 14

[0044] It can also be seen from the figure that the screw gear shaft one 2 includes threaded segment 21 at the first segment and gear segment 22 at the tail segment as shown in Figure 15 . Screw gear shaft two 6 Figure 17 ​​As shown, the screw rod 5 and the screw rod 9 are both threaded rods, and each of the screw rod has a thread section 61 at the leading end and a gear section 62 at the trailing end. The gear modulus of each screw rod gear shaft is 0.5; the gear neck is ∅13; the gear outer diameter is ∅14; and the gear teeth number is 26.

[0045] As shown, the screw rod 5 and the screw rod 9 are both threaded rods, and each of the screw rod has a thread section 61 at the leading end and a gear section 62 at the trailing end. The gear modulus of each screw rod gear shaft is 0.5; the gear neck is ∅13; the gear outer diameter is ∅14; and the gear teeth number is 26. Figures 3-6 As shown, the two screw rod gear shafts are respectively matched and fitted into the corresponding shaft holes, and the gear section of each screw rod gear shaft is located at the intersection of the corresponding shaft hole and the vertical hole. The leading end hole position of the vertical shaft hole 15a and the horizontal shaft hole 15b is also respectively provided with a non-falling structure. Specifically, the corresponding non-falling structure is to set a U-shaped dovetail groove on the base side wall at the corresponding hole position. The end of the axial non-falling nut 4a and the axial non-falling nut 4b has a protruding ring 18, and the protruding ring of the corresponding non-falling nut is installed from the slot opening to the slot bottom of the U-shaped dovetail groove 17. Figure 1 As shown, the two axial non-falling nuts are respectively installed on the thread section of the screw rod gear shaft, and the protruding ring 18 of each axial non-falling nut is matched and fitted into the U-shaped dovetail groove.

[0046] As shown, the protruding ring 18 of the non-falling nut is matched and fitted into the U-shaped dovetail groove 17, and the protruding ring 18 is fixedly installed on the protruding ring fixing plate 16. Figure 20 As shown, the protruding ring 18 of the non-falling nut is matched and fitted into the U-shaped dovetail groove 17, and the protruding ring 18 is fixedly installed on the protruding ring fixing plate 16. Figure 1 As shown, the protruding ring 18 of the non-falling nut is matched and fitted into the U-shaped dovetail groove 17, and the protruding ring 18 is fixedly installed on the protruding ring fixing plate 16.

[0047] As shown, the protruding ring 18 of the non-falling nut is matched and fitted into the U-shaped dovetail groove 17, and the protruding ring 18 is fixedly installed on the protruding ring fixing plate 16. Figure 16 As shown, the protruding ring 18 of the non-falling nut is matched and fitted into the U-shaped dovetail groove 17, and the protruding ring 18 is fixedly installed on the protruding ring fixing plate 16.

[0048] As shown, the protruding ring 18 of the non-falling nut is matched and fitted into the U-shaped dovetail groove 17, and the protruding ring 18 is fixedly installed on the protruding ring fixing plate 16.

[0049] As shown, the protruding ring 18 of the non-falling nut is matched and fitted into the U-shaped dovetail groove 17, and the protruding ring 18 is fixedly installed on the protruding ring fixing plate 16. Figure 2 As shown, the protruding ring 18 of the non-falling nut is matched and fitted into the U-shaped dovetail groove 17, and the protruding ring 18 is fixedly installed on the protruding ring fixing plate 16.

[0050] As shown, the protruding ring 18 of the non-falling nut is matched and fitted into the U-shaped dovetail groove 17, and the protruding ring 18 is fixedly installed on the protruding ring fixing plate 16.

[0051] The feature of the embodiment is that the two nuts are axially fixed on the shell without affecting the rotation. The meshing of the rack screw and the gear shaft is equivalent to axial guidance. When the screw nut on the gear shaft rotates, the gear shaft can only move axially under the guidance. When the screw nut on the rack screw shaft rotates, the rack screw shaft moves axially, and under the meshing condition with the gear shaft, the gear shaft achieves the rotating effect.

[0052] In use, refer to Figure 1 Take the rack gear shaft 2 as the vertical shaft, and its bottom is connected with other fixed parts, so that the fixing and leveling are easy to realize (leveling the four-dimensional control seat 1 to ensure that the rack gear shaft 2 is vertical). (1) When the rotation direction non-loose nut 8a is rotated, the rack screw 5 moves along its axial direction, the rack part 51 located on the side of the rack screw 5 drives the gear segment 21 of the rack gear shaft 2 to rotate, thereby promoting the four-dimensional control seat 1 to produce a rotating effect relative to the rack gear shaft 2. (2) When the rotation axial non-loose nut 4a is rotated, the four-dimensional control seat 1 can be lifted and translated relative to the rack gear shaft 2, and this adjustment is only lifting and rotating adjustment. (3) When the rotation direction non-loose nut 8b is rotated, the rack screw 9 moves along its axial direction, the rack part located on the side of the rack screw 9 drives the gear segment 61 of the rack gear shaft 6 to rotate, thereby promoting the four-dimensional control seat 1 to produce a rotating effect relative to the rack gear shaft 6. (4) When the rotation axial non-loose nut 4b is rotated, the four-dimensional control seat 1 can be horizontally translated relative to the rack gear shaft 6, and this adjustment is only horizontal translation of the rack gear shaft 6 but not rotating adjustment. The pin hole at the end of the rack gear shaft 6 and the positioning pin 14 (2-∅3X24 positioning pin (matching) GB119-76) are used to install the target positioning instrument.

[0053] When the above steps are adjusted, i.e. first rotating adjustment and then translation adjustment, high-precision adjustment can be achieved, but when the translation adjustment is first and then the rotation adjustment, from Figure 2As can be seen, when the steering non-falling nut 8a is rotated to move the rack screw 5 along its axial direction, the rack part 51 of the rack screw 5 drives the gear segment 21 of the screw gear shaft 2 to rotate, which may drive the axial non-falling nut 4a to rotate (usually, the axial non-falling nut 4a is threadedly fastened with the screw gear shaft 2 more tightly than the axial non-falling nut 4a is with the U-shaped dovetail groove 17, so that the axial non-falling nut 4a rotates coaxially with the screw gear shaft 2), or the axial non-falling nut 4a does not rotate, or the axial non-falling nut 4a rotates slowly, but the rotation of the axial non-falling nut 4a has little effect on the axial movement of the screw gear shaft 2. However, by designing the axial non-falling nut 4a to be threadedly fastened with the screw gear shaft 2 more tightly than the axial non-falling nut 4a is with the U-shaped dovetail groove 17, so that the axial non-falling nut 4a rotates coaxially with the screw gear shaft 2, there is no factor affecting the screw gear shaft 2 due to the adjustment of the rack screw 5.

[0054] Example 2: Based on Example 1, further matching the eccentric adjusting sleeve in the vertical hole. The specific structure of the eccentric adjusting sleeve 7 is shown in Figure 18 As shown in the figure, the inner cavity of the pipe body 71 is an eccentric cavity 75, and the end of the pipe body 71 has a side notch forming a clearance groove area 72, and the gear segment of the screw gear shaft matches the clearance groove area 72. One side of the clearance groove area 72 has a straight groove bottom surface 73, and the other side has an arc groove bottom surface 74.

[0055] The function of the eccentric adjusting sleeve is to improve the reasonable gap of the gear and the rack. It can prevent the gap from loosening due to the engagement of the gear and the rack, further reduce the fitting gap between the parts, and improve the adjustment accuracy. In order to ensure the installation stability of the eccentric adjusting sleeve, as Figure 1 As shown in the figure, holes are drilled between the sleeve wall and the hole wall and a split screw 13 (4-M3X6 split screw, GB / T77-2000 inner hexagonal flat end set screw) is installed, so that each eccentric adjusting sleeve is firmly fixed with the four-dimensional control seat 1 as a whole.

[0056] Example 3: A high-precision two-dimensional adjustment device, which includes a base, a screw gear shaft, an axial non-falling nut, a rack screw, and a steering non-falling nut. For details, please refer to Figure 2 As shown in the figure, the base includes an axial hole along a straight line dimension, and another hole perpendicular to the axial hole and intersecting the axial hole, which is called a vertical hole.

[0057] The screw gear shaft, the axial non-falling nut, the rack screw and the steering non-falling nut are the same as or similar to those in Embodiment 1. Specifically, the screw gear shaft comprises a threaded segment at the head and a gear segment at the tail, and after the screw gear shaft is matched and fitted into the shaft hole, the gear segment is located at the intersection of the shaft hole and the vertical hole. The axial non-falling nut is installed on the threaded segment of the screw gear shaft, and the nut is provided with a non-falling structure one at the head of the shaft hole. The rack screw is a rod body with threads on the outer side, and the threads on one side of the rod body are flattened along the axial direction to form a rack part. The steering non-falling nut is installed on the threaded segment of the rack screw, and the nut is provided with a non-falling structure two at the head of the vertical hole. After the rack screw is matched and fitted into the vertical hole, the rack part is engaged with the gear segment of the screw gear shaft, and a constraint structure is arranged to prevent the rack screw from rotating.

[0058] When the axial non-falling nut is rotated, the rack part of the rack screw restricts the gear segment of the screw gear shaft, so that the screw gear shaft can only be adjusted in the axial direction. When the steering non-falling nut is rotated, the rack screw is driven to move in the axial direction, thereby pushing the gear segment of the screw gear shaft to rotate, so as to realize the rotational adjustment of the base relative to the screw gear shaft.

[0059] Embodiment 4: A high-precision six-dimensional adjustment device, the six-dimensional adjustment refers to three translational adjustments and steering adjustments along the corresponding axes which are perpendicular to each other. The device comprises a six-dimensional control base, three screw gear shafts, three axial non-falling nuts, three rack screws and three steering non-falling nuts.

[0060] Specifically, the six-dimensional control base comprises three shaft holes which are perpendicular to each other, and each shaft hole is provided with a vertical hole which is perpendicular to the shaft hole.

[0061] The screw gear shaft comprises a threaded segment at the head and a gear segment at the tail.

[0062] The three screw gear shafts are respectively matched and fitted into the corresponding shaft holes, and the gear segment of each screw gear shaft is located at the intersection of the corresponding shaft hole and the vertical hole.

[0063] The three axial non-falling nuts are respectively installed on the threaded segments of the screw gear shafts, and each axial non-falling nut is provided with a non-falling structure one at the head of the corresponding shaft hole.

[0064] The three rack screws are rod bodies with threads on the outer side, and the threads on one side of each rack screw are flattened along the axial direction to form a rack part.

[0065] The three steering non-falling nuts are respectively installed on the threaded segments of the corresponding rack screws, and each steering non-falling nut is provided with a non-falling structure two at the head of the corresponding vertical hole.

[0066] Three rack screws are respectively matched and sleeved in corresponding vertical connection holes, the rack part is engaged with the gear segment of the corresponding screw gear shaft, and a constraint structure for preventing rotation of each rack screw is arranged.

Claims

1. A high-precision multi-dimensional adjustment device comprising a base, a screw gear shaft, an axial non-falling nut, a rack screw, and a steering non-falling nut, characterized in that, The base comprises a shaft hole, another hole perpendicular to the shaft hole and the intersection of the two holes, called the vertical hole; the lead screw gear shaft comprises a threaded section at the head and a gear section at the tail, and after the lead screw gear shaft is matched and fitted into the shaft hole, the gear section is located at the intersection of the two holes, and the lead screw gear shaft can slide along the tooth surface of the gear section when it moves axially; the axial non-falling nut is installed on the threaded section of the lead screw gear shaft, and the nut is provided with a non-falling structure one at the head of the shaft hole; the non-falling structure one is a U-shaped dovetail groove provided on the side wall of the base at the corresponding hole position; the end of the axial non-falling nut has a protruding ring which is installed from the slot opening to the groove bottom of the U-shaped dovetail groove, and a matching patch is fixedly installed on the slot opening of the U-shaped dovetail groove to block the axial non-falling nut; the rack lead screw is a threaded rod body with external threads, and the threads on one side are axially flattened to form a rack part; after the rack lead screw is matched and fitted into the vertical hole, the rack part is engaged with the gear section of the lead screw gear shaft; the turning non-falling nut is installed on the threaded section of the rack lead screw, and the nut is provided with a non-falling structure two at the head of the vertical hole; the non-falling structure two is a U-shaped dovetail groove provided on the side wall of the base at the corresponding hole position; the end of the turning non-falling nut has a protruding ring which is installed from the slot opening to the groove bottom of the U-shaped dovetail groove, and a matching patch is fixedly installed on the slot opening of the U-shaped dovetail groove to block the turning non-falling nut; a restraining structure is provided to prevent the rack lead screw from rotating; the restraining structure is a planar restraining component matched with the plane of the rack part provided on the inner wall of the vertical hole at the side of the rack part, or a recess is provided on the side surface of the rack lead screw along the generatrix and a locking pin is installed in the recess on the inner wall of the vertical hole; an eccentric adjusting sleeve is matched and fitted into the vertical hole; the inner cavity of the tube body of the eccentric adjusting sleeve is an eccentric cavity; the end of the tube body has a side notch forming a give-way groove area; the gear section of the lead screw gear shaft is matched with the give-way groove area.

2. A high-precision multi-dimensional adjusting device, comprising a four-dimensional control seat, two lead screw gear shafts, an axial non-falling nut corresponding to each lead screw gear shaft, a rack lead screw corresponding to each lead screw gear shaft, and a turning non-falling nut corresponding to each rack lead screw, characterized in that: the four-dimensional control seat is provided with two mutually perpendicular shaft holes, and each shaft hole is provided with a vertical hole corresponding to the intersection thereof; each lead screw gear shaft comprises a threaded section at the head and a gear section at the tail, and after the lead screw gear shaft is matched and fitted into the corresponding shaft hole, the gear section is located at the intersection of the shaft hole and the vertical hole, and the lead screw gear shaft can slide along the tooth surface of the gear section when it moves axially; each axial non-falling nut is installed on the threaded section of the corresponding lead screw gear shaft, and the axial non-falling nut is provided with a non-falling structure one at the head of the shaft hole; the non-falling structure one is a U-shaped dovetail groove provided on the side wall of the four-dimensional control seat at the corresponding hole position; the end of the axial non-falling nut has a protruding ring which is installed from the slot opening to the groove bottom of the U-shaped dovetail groove, and a matching patch is fixedly installed on the slot opening of the U-shaped dovetail groove to block the axial non-falling nut; ​ ​ ​ Each rack screw is a threaded rod, one side of which is threaded and flattened along the axial direction to form a rack section; the rack screw is matched and fitted into the corresponding vertical hole, and the rack section is engaged with the gear section of the corresponding rack gear shaft; Each steering non-falling nut is installed on the threaded section of the corresponding rack screw, and the steering non-falling nut is provided with non-falling structure two at the first end of the vertical hole; the non-falling structure two is a U-shaped dovetail groove provided on the side wall of the four-dimensional control seat at the corresponding hole position; the end of the steering non-falling nut has a protruding ring which is installed from the slot opening to the slot bottom of the U-shaped dovetail groove, and the slot opening of the U-shaped dovetail groove is fixedly installed with a matching patch to block the steering non-falling nut; Each vertical hole is provided with a constraint structure for preventing the corresponding rack screw from rotating, or a recess is provided on the side surface of the rack screw along the generatrix, and a locking pin is installed in the inner wall of the vertical hole to insert into the recess; the constraint structure and the engagement of the gear section-rack section together ensure that the rack screw can only move axially and cannot rotate; Each vertical hole is matched and fitted with an eccentric adjusting sleeve, the inner cavity of the tube body of the eccentric adjusting sleeve is an eccentric cavity, and the end of the tube body has a gap on one side to form a gap slot area; the gear section of the corresponding rack gear shaft is matched in the gap slot area.

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