A linear adjustment device for circumferential phase

Abstract

The application discloses a linear adjustment device for circumferential phase, which comprises a core shaft, left and right two half-couplings, and upper and lower two phase adjustment assemblies; the left and right two half-couplings are sleeved on the core shaft and form rotary pairs with the core shaft, and the left and right two half-couplings are connected through the upper and lower two phase adjustment assemblies and form rotary pairs with the phase adjustment assemblies; each half-coupling is a half-fork structure, and upper and lower circular arc grooves are arranged on the half-fork; the circular arc positions of the two half-couplings correspond to each other; the upper and lower two phase adjustment assemblies are in contact with the upper and lower circular arc grooves of the two half-couplings through the circular arc surfaces at the two ends, and the upper and lower two phase adjustment assemblies connect the half-forks of the two half-couplings. The application can conveniently adjust the circumferential phase, and meanwhile, the transmission torque capacity and reliability of the whole device are improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of mechanical transmission, and relates to a phase adjustment device with a linear adjustment function, which can perform linear adjustment of the phase in a circumferential direction within a certain range. Background Art

[0002] Cross-wedge rolling, a new rolling technology developed in the 1960s, is a metal plastic processing process that uses a cross-rolling method on a machine (rolling mill) equipped with rolls equipped with wedge-shaped dies to produce variable-section stepped shaft products or blanks. During the rolling process, two rolls with wedge-shaped holes rotate in the same direction along the forward direction of the billet, gradually rolling the billet into a variable-section rotating body. Compared with traditional forging or cutting processes, the cross-wedge rolling process has the advantages of high production efficiency, high material utilization, good product quality, an improved working environment, and a high degree of automation. The core technology of cross-wedge rolling is how to accurately ensure the relative position of the wedge dies on the two rolls, thereby ensuring the dimensional tolerance of the rolled product. In actual production, multiple trial rollings are often used to determine whether the die phase of the two rolls has reached the required level. Therefore, a phase adjustment device must be designed in the drive chain of one of the rolls to achieve independent circumferential linear adjustment of the roll.

[0003] Similar to cross wedge rolling, the production process of rebar also requires ensuring that the transverse ribs of the rebar are aligned on the same spiral plane. Therefore, the current two-roller rebar finishing rolling also requires an adjustment device on one of the rolls to achieve linear adjustment on the roll's independent circumference.

[0004] CN201579266U (announcement date: September 15, 2010) discloses a phase adjuster with a linear adjustment function, which includes a left adjustment disk, a right adjustment disk and an adjustment pin fixed on an intermediate core shaft. The circumferential phase linear adjustment is achieved by screwing in and out of the adjustment pin. Its disadvantage is that due to the small contact area between the adjustment pin and the adjustment disk, the torque transmission capacity and reliability of the entire device are relatively low.

[0005] CN206111891 (announcement date 2017.4.19) discloses a circumferential phase linear adjustment coupling, which includes a half-coupling, a connecting bolt group, and a circumferential phase linear adjustment device. The circumferential phase linear adjustment device is used to achieve circumferential phase linear adjustment. Its disadvantages are: the circumferential phase linear adjustment device has a complex structure and is difficult to adjust; at the same time, the contact area between the ear shaft and the torque transmission block is small, which makes the torque transmission capacity and reliability of the entire device relatively small.

[0006] In addition, the above two solutions can be easily implemented when the roller's moment of inertia is small, but it is difficult to adjust when the roller's moment of inertia is large; and repeated adjustments will cause wear gaps, thereby affecting the accuracy of mass-produced products. Summary of the Invention

[0007] The problem to be solved by the present invention is to provide a linear adjustment device for the circumferential phase, which can conveniently perform circumferential phase adjustment; at the same time, it improves the torque transmission capacity and reliability of the entire device. At the same time, the present invention has a simple structure, low manufacturing difficulty, and low cost. In addition, the present invention can also be conveniently adjusted when the moment of inertia of the roller is large, will not cause wear gaps, and ensures the accuracy of mass-produced products. In short, the linear adjustment device for the circumferential phase of the invention is suitable for occasions with small rotation space, large transmission torque, and the need for linear adjustment in the circumferential direction. It is particularly suitable for solving the problem of phase adjustment of paired roller surfaces in wedge cross rolling mills and rebar finishing production.

[0008] The present invention provides a linear adjustment device for circumferential phase, which includes a core shaft, two left and right half-couplings, and two upper and lower phase adjustment components; the left and right half-couplings are sleeved on the core shaft and form a rotating pair with the core shaft, and the left and right half-couplings are connected by two upper and lower phase adjustment components and form a rotating pair with the phase adjustment component.

[0009] Furthermore, the core shaft has a transition fit or an interference fit with one half coupling, and a clearance fit with the other half coupling.

[0010] Furthermore, each half-coupling is a half-fork structure, and upper and lower arc grooves are provided on its half fork, and the arc positions of the two half-couplings correspond to each other; the upper and lower phase adjustment components respectively contact the upper and lower arc grooves of the two half-couplings through the arc surfaces at both ends, and the upper and lower phase adjustment components connect the half forks of the two half-couplings.

[0011] Furthermore, each phase adjustment assembly includes two left and right arc sliders, a wedge block, and two sets of locking units. Each set of locking units includes a locking screw, two locking nuts, and two washers. The left and right arc sliders respectively cooperate with the corresponding arc grooves on the left and right half-coupling half forks. The wedge block is arranged between the two arc sliders. The locking screw passes through the arc slider, the wedge block, and the half-coupling. Its two ends are locked by washers and locking nuts to connect the left and right half-couplings.

[0012] Furthermore, the arc sliders are used in pairs, one end of which is an arc surface and the other end is a flat surface, the arc surface contacts the arc groove on the half fork of the half coupling, and the flat surface contacts the wedge block; two front and rear through holes are provided on the arc slider, and a square through hole is provided in the middle of the wedge block. The locking screw passes through the mounting hole on one half coupling, the through hole of an arc slider, the through hole of the wedge block, the through hole of the other arc slider, and the mounting hole on the other half coupling, and is then locked by a washer and a locking nut.

[0013] Furthermore, two front and rear countersunk holes are provided on the circumferential surface of the half coupling, and the positions of the countersunk holes on the left and right half couplings correspond to each other; the large hole of each countersunk hole opens on the outer circumferential surface of the half coupling, and the small hole opens on its arc groove, and a spherical groove is provided on the transition surface between the large and small holes; the washers are ball washers used in pairs, one end of which is spherical and the other end is flat, the spherical surface of which cooperates with the spherical groove on the half coupling, and the flat surface contacts the locking nut.

[0014] Furthermore, there are multiple wedge blocks, and two wedge blocks form a group. The inner surfaces of the two wedge blocks in a group that are in contact with each other are wedge surfaces, and the outer surfaces of the two wedge blocks are straight surfaces.

[0015] Furthermore, there are multiple wedge blocks, and three wedge blocks form a group. The inner surfaces of the three wedge blocks in a group that are in contact with each other are wedge surfaces, and the outer surfaces of the two outermost wedge blocks are straight surfaces.

[0016] Furthermore, the included angle β between the inclined surface and the straight surface of the wedge block is smaller than the equivalent friction angle, and is any angle greater than 0° and less than 10°.

[0017] Furthermore, concave and convex stoppers are provided on the mating surfaces of the arc slider and the wedge-shaped block, and concave and convex stoppers are provided on the mating surface between the two wedge-shaped blocks.

[0018] The advantages of the linear adjustment device of the present invention are: 1. Loosening the four locking screws to adjust the position of the wedge block forward and backward, increasing the circumferential position between the two half-couplings, so that the half-couplings can be easily adjusted in the circumferential phase; 2. The half-couplings cooperate with the arc surface of the arc slider through the arc groove to achieve automatic positioning between the two; the phase adjustment component and the half-coupling use arc surface contact to transmit torque, achieving high torque transmission in a limited space, and improving the torque transmission capacity and reliability of the entire device; 3. The entire adjustment device has a simple structure, low manufacturing difficulty and low cost; 4. Since the phase can be passively adjusted according to the roller, it can be easily adjusted even when the roller has a large moment of inertia, without causing wear gaps, thereby ensuring the accuracy of mass-produced products.

[0019] In summary, the invented linear adjustment device for circumferential phase is suitable for situations where the rotation space is small, the transmitted torque is large, and linear adjustment in the circumferential direction is required. It is particularly suitable for solving the problem of phase adjustment of paired roll surfaces in wedge cross rolling mills and rebar finishing production. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a perspective view of the linear adjustment device of the present invention;

[0021] Figure 2 is an exploded view of the linear adjustment device of the present invention;

[0022] Figure 3is a three-dimensional exploded view of the phase adjustment component;

[0023] Figure 4 This is the main view of the present invention when the phase linearity is adjusted to the middle position;

[0024] Figure 5 yes Figure 4 A top view of

[0025] Figure 6 This is the main view of the present invention when the phase linearity is adjusted to the limit position;

[0026] Figure 7 yes Figure 6 A top view of

[0027] Figure 8 This is a schematic diagram of the structure of the wedge block Figure 1 ;

[0028] Figure 9 This is a schematic diagram of the structure of the wedge block Figure 2 ;

[0029] Figure 10 This is a schematic diagram of the structure of the wedge block Figure 3 ;

[0030] Figure 11 This is a schematic diagram of the structure of the wedge block Figure 4 ;

[0031] Figure 12 3 is a comparative schematic diagram before and after adjustment using the wedge cross rolling of the present invention. DETAILED DESCRIPTION

[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0033] Example 1

[0034] from Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7It can be seen that the present invention provides a linear adjustment device for circumferential phase, which includes a core shaft 1, two left and right half-couplings 2, and two upper and lower phase adjustment components 3; the left and right half-couplings 2 are mounted on the core shaft 1 and form a rotating pair with the core shaft 1, and the left and right half-couplings 2 are connected by two upper and lower phase adjustment components 3 and form a rotating pair with the phase adjustment components 3.

[0035] The linear adjustment device of the present invention first adjusts the axial position of the upper and lower phase adjustment assemblies 3, increasing the circumferential position between the two coupling halves 2. One coupling halves 2 are then rotated about the core shaft 1, achieving relative rotation between the two coupling halves 2, thereby linearly adjusting the circumferential phase between the two coupling halves 2. Because the phase adjustment assembly 3 and the coupling halves 2 form a revolute pair, the phase adjustment assembly 3 and the coupling halves 2 can be compressed before and after adjustment.

[0036] In the linear adjustment device for the circumferential phase of the present invention, the end face of one half coupling is connected to the transmission shaft, and the end face of the other half coupling is connected to the rolling roller; on the production line, one of the upper and lower rolling rollers (for example, the upper roller) is connected to the phase adjustment device of the present invention to achieve rotation, so that the phase between the upper and lower rollers can be fine-tuned to ensure that the size of the rolled product meets the requirements.

[0037] Example 2

[0038] The linear adjustment device for circumferential phase of the present invention has a transition fit or interference fit between the core shaft 1 and one half coupling 2, and a clearance fit between the core shaft 1 and the other half coupling 2.

[0039] Since the end face of one half coupling is connected to the transmission shaft and the end face of the other half coupling is connected to the rolling roller, what needs to be adjusted is the phase between this rolling roller and the other rolling roller. Therefore, the fit between the inner hole of the half coupling connected to the rolling roller and the core shaft 1 is a clearance fit to facilitate its circumferential rotation.

[0040] Example 3

[0041] from Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 6 It can be seen that the linear adjustment device of the circumferential phase of the present invention: each half-coupling 2 is a half-fork structure, and the half fork is provided with an upper and lower circular arc groove, and the arc positions of the two half-couplings 2 correspond to each other; the upper and lower phase adjustment components 3 are in contact with the upper and lower circular arc grooves of the two half-couplings 2 through the circular arc surfaces at both ends thereof, and the upper and lower phase adjustment components 3 connect the half forks of the two half-couplings 2.

[0042] The arcuate grooves on the forks of half coupling 2 mate with the arcuate surface of phase adjustment assembly 3, achieving automatic positioning between the two, ensuring constant contact and tight compression. Furthermore, the arcuate contact between phase adjustment assembly 3 and half coupling 2 transmits torque, enabling high torque transfer within a limited space and improving the torque transfer capacity and reliability of the entire device.

[0043] Example 4

[0044] from Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 It can be seen that the linear adjustment device of the circumferential phase of the present invention: each phase adjustment component 3 includes two left and right arc sliders 31, a wedge block 32, and two sets of locking units, each set of locking units includes a locking screw 33, two locking nuts 34, and two washers 35; the left and right arc sliders 31 respectively cooperate with the corresponding arc grooves on the left and right half-couplings 2 half forks, the wedge block 32 is arranged between the two arc sliders 31, and the locking screw 33 passes through the arc slider 31, the wedge block 32, and the half coupling 2, and its two ends are locked by washers 35 and locking nuts 34 to connect the left and right half-couplings 2.

[0045] The locking screw 33 may be an integral structure or may be composed of multiple screws connected in series.

[0046] The locking unit connects the arc slider 31, the wedge block 32, and the half coupling 2: when the locking unit is loosened, the position of the wedge block 32 can be adjusted forward and backward, so that the half coupling 2 can be phase-adjusted; after the phase adjustment is completed, the arc slider 32, the wedge block 32, and the half coupling 2 are connected through the locking unit.

[0047] Example 5

[0048] from Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7It can be seen that the linear adjustment device of the circumferential phase of the present invention: the arc slider 31 is used in pairs, one end of which is an arc surface and the other end is a flat surface, the arc surface contacts the arc groove on the half fork of the half coupling 2, and the flat surface contacts the wedge block 32; two front and rear through holes are provided on the arc slider 31, and a square through hole is provided in the middle of the wedge block 32. The locking screw 33 passes through the mounting hole on one half coupling 2, the through hole of one arc slider 31, the through hole of the wedge block 32, the through hole of the other arc slider 31, and the mounting hole on the other half coupling 2, and is then locked by a washer 35 and a locking nut 34.

[0049] The contact surface between the wedge block 32 and the arc slider 31 can be a straight surface or an inclined surface. Considering the convenience of processing, the contact surface between the wedge block and the circular slider is preferably a straight surface.

[0050] The arc grooves on the forks of the coupling halves 2 mate with the arc surfaces of the arc sliders 31, achieving automatic positioning between the two. Furthermore, the arc sliders 31 and the coupling halves 2 transmit torque through surface contact, enabling high torque transmission within a limited space and improving the torque transmission capacity and reliability of the entire device. Furthermore, when the circumferential phase between the two coupling halves 2 changes, the arc surfaces of the left and right arc sliders 31 and the arc grooves of the coupling halves rotate relative to each other, while the planes of the arc sliders remain parallel, ensuring effective load transmission after phase adjustment.

[0051] The two through holes of the arc slider 31 ensure the fastening of the locking screw 33; the function of the square through hole of the wedge block 32 is that when the wedge block 32 moves back and forth, there will be no interference between the locking screw 33 passing through the square through hole and the wedge block 32, which facilitates the adjustment of the wedge block 32.

[0052] Example 6

[0053] from Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 It can be seen that the linear adjustment device of the circumferential phase of the present invention: two front and rear countersunk holes are provided on the circumferential surface of the half coupling 2, and the positions of the countersunk holes on the left and right half couplings 2 correspond to each other; the large hole of each countersunk hole opens on the outer circumferential surface of the half coupling 2, and the small hole opens on its arc groove, and a spherical groove is provided on the transition surface between the large and small holes; the washer 35 is a ball washer used in pairs, one end of which is spherical and the other end is flat, its spherical surface cooperates with the spherical groove on the half coupling 2, and the flat surface contacts with the locking nut 34.

[0054] When the phase between the two half-couplings 2 changes, the spherical surface of the ball pad 35 and the spherical groove of the half-coupling 2 slide relative to each other, while the planes of the paired ball pads remain parallel, thereby achieving a close fit between the locking nut 34 and the plane of the ball pad 35 after the phase adjustment, thereby ensuring a close connection between the two half-couplings 2 and the arc slider 31 and the wedge block 32.

[0055] Example 7

[0056] The linear adjustment device for the circumferential phase of the present invention: The structure of the wedge block 32 can be the following structures but is not limited to the following structures:

[0057] like Figure 8 、 9 As shown, there are multiple wedge blocks 32, two wedge blocks form a group, the inner surfaces of the two wedge blocks in a group that are in contact with each other are wedge surfaces, and the outer surfaces of the two wedge blocks are straight surfaces.

[0058] The wedge blocks can be arranged in one, two, or more groups. When there are multiple groups of wedge blocks, the wedge directions of the wedge blocks in two adjacent groups can be the same or opposite. When the wedge directions are opposite, both wedge blocks can be adjusted simultaneously, improving work efficiency.

[0059] like Figure 10 、 11 As shown, there are multiple wedge blocks 32, three wedge blocks form a group, the inner surfaces of the three wedge blocks in a group that are in contact with each other are wedge surfaces, and the outer surfaces of the two outermost wedge blocks are straight surfaces.

[0060] The wedge directions of the three wedges in a set are as follows: the left and right ends of the middle wedge have the same wedge direction, or the left and right ends of the middle wedge have opposite wedge directions. If the wedge angles are the same and the axial movement distances of the wedges are the same, a middle wedge with opposite wedge directions on the left and right ends can achieve a larger adjustment angle.

[0061] from Figure 5 、 Figure 7 As can be seen, the wedge blocks 32 move axially back and forth through their wedge-shaped surfaces, changing the thickness of the phase adjustment assembly 3 (the distance between the two arc-shaped sliders), thereby providing circumferential adjustment space between the two coupling halves. The specific number of wedge blocks 32 can be determined based on their size and wedge angle.

[0062] by Figure 8 For example, the transmission of torque is achieved through the arc surface of a circular slider - straight surface - inclined surface - straight surface - inclined surface - straight surface - arc surface of another circular slider.

[0063] Example 8

[0064] like Figure 8 As shown, in the linear adjustment device for circumferential phase of the present invention, the angle β between the inclined surface and the straight surface of the wedge block 32 is smaller than the equivalent friction angle and is any angle greater than 0° and less than 10°.

[0065] The angle β of the wedge block 32 is smaller than the equivalent friction angle, so that the wedge block 32 can be self-locking. After the wedge block 32 is adjusted into place and the screw is tightened, it can be ensured that no sliding occurs, thereby ensuring the reliability of the phase angle.

[0066] Example 9

[0067] from Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 6 It can be seen that in the linear adjustment device for circumferential phase of the present invention, concave and convex stoppers are provided on the mating surfaces of the arc slider 31 and the wedge block 32 , and concave and convex stoppers are provided on the mating surface between the two wedge blocks 32 .

[0068] The concave and convex stoppers provide guidance for the forward and backward movement of the wedge blocks 31 along the wedge surface, while achieving positioning between the wedge blocks 32 and between the wedge blocks 32 and the arc slider 31.

[0069] When assembling the linear adjustment device of the present invention, first place one half coupling flat, then place the arc sliders and wedge blocks of the two sets of phase adjustment components in order, align the two end surfaces of the wedge blocks, so that the arc surface of one arc slider fits into the arc groove of this half coupling, then hoist the other half coupling so that the arc groove of the other half coupling fits into the arc surface of the other arc slider, finally insert the locking screw, and lock it through the locking nut and ball washer.

[0070] The following combination Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 The adjustment steps for the linear adjustment device of the present invention are as follows: 1. Loosen the locking nut 34; 2. Move the wedge block 32 back and forth along the wedge surface, adjusting the axial position of the wedge block 32 to reduce the thickness between the two arc sliders 31, thereby freeing up circumferential adjustment space between the two coupling halves 2; 3. Manually adjust the phase between the two coupling halves 2 to meet the required position; 4. Adjust the axial position of the wedge block 32 again to eliminate the gap between the coupling halves 2, the arc sliders 31, and the wedge block 32; 5. Tighten the locking nut 34 to complete the phase adjustment. In other words, the linear adjustment device of the present invention can conveniently adjust the phase between the two coupling halves within a certain range by loosening the locking nut and adjusting the axial position of the wedge block.

[0071] from Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 It can be seen that when the linear adjustment device of the present invention is in the neutral position, the angle between its two half-couplings is 30°. After the phase adjustment α = 2.5°, the angles between the two half-couplings are 30° + 2.5° = 32.5° and 30° - 2.5° = 27.5°, respectively. The neutral angle of the linear adjustment device of the present invention is designed based on the strength of the half-coupling 2 and the size of the phase adjustment assembly 3, and may be 25°, 35°, or other angles. The adjustment angle α is determined by the customer's required roll adjustment angle. Based on α, the wedge angle and number of wedges in the phase adjustment assembly can be reasonably designed to ensure that the wedges can axially expand and contract within the allowable range during phase adjustment (the expansion and contraction range is limited by the size of the wedge hole), thereby meeting the maximum adjustment angle requirement.

[0072] The linear adjustment device for the circumferential phase of the present invention has the following advantages: 1. Phase adjustment can be performed by loosening four locking screws, and the phase adjustment speed is quick and convenient; 2. Surface contact is used to transmit torque between the phase adjustment component and the half-coupling, thereby realizing the transmission of large torque in a limited space and ensuring the reliability of the device; 3. The structure of the entire device is simple, the manufacturing difficulty is low, and the cost is low; 4. Since the phase can be passively adjusted according to the rolling roller, it can be easily adjusted even when the rolling roller has a large moment of inertia, and no wear gap will be caused, thereby ensuring the accuracy of mass-produced products.

[0073] In summary, the invented linear adjustment device for circumferential phase is suitable for situations where the rotation space is small, the transmitted torque is large, and linear adjustment in the circumferential direction is required. It is particularly suitable for solving the problem of phase adjustment of paired roll surfaces in wedge cross rolling mills and rebar finishing production.

[0074] The following combination Figure 12 The effects of wedge cross-rolling using the linear circumferential phase adjustment device of the present invention are described as follows: the upper roller is the male die, and the lower roller is the female die. Due to manufacturing and installation errors in the transmission system and the rollers, when there is no phase adjustment device, the circumferential phase of the upper and lower rollers deviates, and the male and female dies cannot be accurately aligned, making it difficult to ensure that the rolled product meets the requirements. When the phase adjustment device of the present invention is used on the upper roller, after loosening the locking nut and adjusting the wedge block to make room for circumferential adjustment, since one of the half-couplings is connected to the upper roller, the upper roller phase can be manually fine-tuned until the male and female dies of the upper and lower rollers are aligned. The wedge block is then adjusted to eliminate the gap, and the nut is finally tightened. After a successful trial rolling, continuous batch production can be carried out to ensure that the dimensions of the rolled product meet the requirements.

[0075] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A linear adjustment device for circumferential phase, characterized by: It comprises a core shaft (1), two left and right half-couplings (2), and two upper and lower phase adjustment components (3); the left and right half-couplings (2) are sleeved on the core shaft (1) and form a rotation pair with the core shaft (1); the left and right half-couplings (2) are connected via two upper and lower phase adjustment components (3) and form a rotation pair with the phase adjustment components (3); each half-coupling (2) is a half-fork structure, and upper and lower arc grooves are provided on the half-fork, and the arc positions of the two half-couplings (2) correspond to each other; the upper and lower phase adjustment components (3) contact the upper and lower arc grooves of the two half-couplings (2) through the arc surfaces at both ends thereof, and the upper and lower phase adjustment components (3) adjust the two half-couplings (2) to form a rotation pair. The half forks of the half coupling (2) are connected; each phase adjustment component (3) includes two left and right arc sliders (31), a wedge block (32), and two sets of locking units, each set of locking units includes a locking screw (33), two locking nuts (34), and two washers (35); the left and right arc sliders (31) respectively cooperate with the corresponding arc grooves on the half forks of the left and right half couplings (2), the wedge block (32) is set between the two arc sliders (31), the locking screw (33) passes through the arc slider (31), the wedge block (32), and the half coupling (2), and its two ends are locked by washers (35) and locking nuts (34), so that the left and right half couplings (2) are connected.

2. The linear adjustment device according to claim 1, wherein: The core shaft (1) and one half coupling (2) have a transition fit or an interference fit, and the core shaft (1) and the other half coupling (2) have a clearance fit.

3. The linear adjustment device according to claim 1, wherein: The arc slider (31) is used in pairs, one end of which is an arc surface and the other end is a flat surface, the arc surface contacts the arc groove on the half fork of the half coupling (2), and the flat surface contacts the wedge block (32); two front and rear through holes are provided on the arc slider (31), and a square through hole is provided in the middle of the wedge block (32); the locking screw (33) passes through the mounting hole on one half coupling (2), the through hole of one arc slider (31), the through hole of the wedge block (32), the through hole of the other arc slider (31), and the mounting hole on the other half coupling (2), and is then locked by a washer (35) and a locking nut (34).

4. The linear adjustment device according to claim 1, wherein: Two front and rear countersunk holes are provided on the circumferential surface of the half coupling (2), and the positions of the countersunk holes on the left and right half couplings (2) correspond to each other; the large hole of each countersunk hole opens on the outer circumferential surface of the half coupling (2), and the small hole opens on its arc groove, and a spherical groove is provided on the transition surface between the large and small holes; the washer (35) is a ball washer used in pairs, one end of which is spherical and the other end is flat, the spherical surface of the washer matches the spherical groove on the half coupling (2), and the flat surface contacts the locking nut (34).

5. The linear adjustment device according to claim 1, wherein: There are a plurality of wedge-shaped blocks (32), two wedge-shaped blocks form a group, the inner surfaces of the two wedge-shaped blocks in a group that are in contact with each other are wedge-shaped surfaces, and the outer surfaces of the two wedge-shaped blocks are straight surfaces.

6. The linear adjustment device according to claim 1, characterized in that: There are multiple wedge blocks (32), and three wedge blocks form a group. The inner surfaces of the three wedge blocks in a group that are in contact with each other are wedge surfaces, and the outer surfaces of the two outermost wedge blocks are straight surfaces.

7. The linear adjustment device according to claim 1, wherein: The included angle β between the inclined surface and the straight surface of the wedge block (32) is smaller than the equivalent friction angle and is any angle greater than 0° and less than 10°.

8. The linear adjustment device according to claim 1, wherein: Concave and convex stoppers are provided on the matching surfaces of the arc slider (31) and the wedge-shaped block (32), and a concave and convex stopper is provided on the matching surface between the two wedge-shaped blocks (32).

Images