Rotator for screw installation

Abstract

The invention relates to the field of test auxiliary equipment, and discloses a rotator for installing a screw, the rotator comprises an outer layer structure and an inner layer structure movably arranged in the outer layer structure, a locking cavity is formed in the inner layer structure, and one end of the screw penetrates through the locking cavity and is locked; a transmission structure which drives the inner layer structure to rotate by pressing the outer layer structure downwards is arranged between the outer layer structure and the inner layer structure. After the screw rod is locked on the inner layer structure, through the cooperation of the outer layer structure, the inner layer structure and the transmission structure, after one end, far away from the inner layer structure, of the screw rod is aligned with and extends into a screw hole in a table board of test equipment, the screw rod can be locked by only needing to apply a downward pressing acting force after the outer layer structure is held; the inner layer structure can rotate through the transmission structure to drive the screw rod to rotate, so that the operation process is simplified, the labor intensity is reduced, and the efficiency is improved compared with manual rotation of the screw rod.

Description

Technical Field

[0001] The invention relates to the field of test auxiliary equipment, in particular to a rotator for screw rod installation. Background Art

[0002] In mechanical tests such as vibration tests and mechanical impact tests, the product needs to be fixed on the test equipment table in rigid contact. To achieve the above purpose, screws are usually needed to assist in fixing the product. The screw is screwed into the test equipment table, and then the pressure strip and nut are used to press the product onto the test table for testing. In actual tests, testers can only manually screw the screws one by one into the corresponding screw holes on the test equipment table. Since the table screw holes are deep, a large number of screws need to be screwed in, and because of the different sizes of products, screws of different lengths need to be constantly replaced. The tester relies on manual rotation, which is not only inefficient, but also causes arm fatigue and weakness after manually screwing in the screw. Therefore, a lot of time is consumed in the process of installing the screw on the test equipment table, affecting the test efficiency. Summary of the invention

[0003] In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the present invention is to provide a rotator for screw installation to solve the problem that manually screwing in the screw causes discomfort to the operator and affects the test efficiency.

[0004] In order to solve the above technical problems, a technical solution adopted by the present invention is: a rotator for screw installation is provided, including an outer layer structure and an inner layer structure movably arranged in the outer layer structure, a locking cavity is formed in the inner layer structure for allowing one end of the screw to pass through and having limiting teeth for locking the screw, and a transmission structure is arranged between the outer layer structure and the inner layer structure, which drives the inner layer structure to rotate by pressing down the outer layer structure.

[0005] Furthermore, the transmission structure includes a first transmission part arranged on the inner layer structure and a second transmission part arranged on the outer layer structure to cooperate with the first transmission part.

[0006] Furthermore, a transmission cavity opened along the axial direction is formed in the outer layer structure, and the inner layer structure is coaxially movably arranged in the transmission cavity along its axial direction and cooperates with the transmission cavity to rotate so as to be able to rotate. The first transmission part and the second transmission part drive the inner layer structure to rotate through rolling friction in the transmission cavity.

[0007] Furthermore, the first transmission part includes a spiral groove spirally opened around the outer wall of the inner layer structure; the second transmission part includes a push rod arranged on the outer layer structure, the push rod has a rolling end that penetrates into the transmission cavity and can extend into the spiral groove after the inner layer structure penetrates into the transmission cavity, the rolling end can rotate relative to the push rod, and when the outer layer structure is pressed downward in the axial direction, the rolling end and the spiral groove rolling friction cooperate to make the inner layer structure rotate relative to the outer layer structure and move axially.

[0008] Furthermore, the outer layer structure is formed with a mounting cavity which is circumferentially arranged on the outside of the transmission cavity, and the end of the push rod away from the rolling end radially penetrates into the mounting cavity and has a head; the second transmission part also includes a spring which is sleeved on the push rod and whose two ends respectively abut against the inner cavity wall and the head of the mounting cavity; when the push rod is in a state of no force, the spring is in a normal state and the rolling end is located outside the spiral groove, and when the push rod is in a state of force, the spring is compressed and the rolling end can extend into the spiral groove.

[0009] Furthermore, the transmission structure also includes a third transmission part arranged in the installation cavity, and the third transmission part is used to switch the push rod between a stressed state and a non-stressed state.

[0010] Furthermore, the third transmission part switches the state of the push rod by sliding along the axial direction of the outer layer structure.

[0011] Furthermore, the third transmission part includes an operating plate slidably arranged in the installation cavity along the axial direction of the outer layer structure, a trigger part connected to the side of the operating plate facing the transmission cavity, and a push switch connected to the operating plate and exposed outside the outer layer structure; the trigger part has a guide section distributed along the axial direction of the outer layer structure for gradually squeezing the push rod head and an abutting section for abutting the push rod head to put it in a stressed state.

[0012] Furthermore, the spiral groove includes a first spiral segment and a second spiral segment which are distributed in sequence along the axial direction of the inner layer structure and have opposite rotation directions, and the push rods are correspondingly arranged in two groups to correspond to the first spiral segment and the second spiral segment respectively along the radial direction; the installation cavity has a window space that makes the trigger part offset in the push rod distribution so that the push rods are in a state of no force, and the trigger part is used to put one group of push rods in a state of force.

[0013] Furthermore, the guide segments are provided in two and are inclined relative to the axial direction, the two guide segments are symmetrically arranged on both sides of the abutment segment along the axial direction of the outer layer structure, and the abutment segment is narrower than the spacing between the two groups of push rods.

[0014] The rotator for screw installation of the present invention has at least the following beneficial effects: after the screw is locked on the inner layer structure, through the cooperation between the outer layer structure, the inner layer structure and the transmission structure, the end of the screw away from the inner layer structure can be aligned and extended into the screw hole on the table top of the test equipment. It is only necessary to apply a downward force after holding the outer layer structure, so that the inner layer structure can be rotated through the transmission structure to drive the screw to rotate, thereby simplifying the operation process, reducing labor intensity, and improving efficiency compared to manually turning the screw. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0016] Figure 1 It is a schematic diagram of the structure of the cooperation between the rotator and the screw rod of the present invention;

[0017] Figure 2 It is a structural schematic diagram of the rotator of the present invention (partially cut away);

[0018] Figure 3 It is a front structural schematic diagram of the cooperation between the rotator (in cross-section) and the screw rod of the present invention;

[0019] Figure 4 It is a cross-sectional view of the inner layer structure and the screw rod of the present invention;

[0020] Figure 5 It is an exploded view of the inner layer structure (partial, cut-away state) and the screw (partial) of the present invention;

[0021] Figure 6 It is a partial top view of the outer cylinder and the third transmission part of the present invention.

[0022] The meanings of the symbols in the accompanying drawings are:

[0023] Screw 1, outer layer structure 2, sleeve 21, toggle hole 211, outer cylinder 22, transmission cavity 221, limiting structure 222, ring mouth 223, first slide groove 224, installation cavity 23, rolling auxiliary structure 24, universal ball 241, inner layer structure 3, inner cylinder 31, sliding section 311, matching section 312, locking cavity 32, limiting tooth 321, protruding structure 33, first transmission part 41, spiral groove 411, first spiral section 4111, second threaded section 4112, second transmission part 42, push rod 421, rolling end 4211, head 4212, spring 422, third transmission part 43, operating plate 431, slider 4311, T-shaped end 4312, trigger part 432, guide section 4321, abutment section 4322, push switch 433. DETAILED DESCRIPTION

[0024] The present invention will be further described below in conjunction with the accompanying drawings.

[0025] See also Figures 1 to 6 The rotator for screw installation of the present invention includes an outer layer structure 2, an inner layer structure 3 movably arranged in the outer layer structure 2, and a transmission structure arranged between the outer layer structure 2 and the inner layer structure 3. The inner layer structure 3 is used to lock the screw 1 so that the screw 1 cannot rotate and move downward axially relative to the inner layer structure 3. The outer layer structure 2 provides support and force application points for the transmission structure and the inner layer structure 3. The transmission structure applies a downward force to the outer layer structure 2 so that the inner layer structure 3 can be driven to rotate when one end of the screw 1 away from the inner layer structure 3 is against the screw hole opening of the test equipment table. The inner layer structure 3 drives the screw 1 locked by it to rotate, so as to convert the applied axial force into a tangential force, making the operation easier, greatly reducing the labor intensity of the operator, and improving the work efficiency.

[0026] See also Figures 1 to 3 The outer structure 2 includes a sleeve 21 and an outer cylinder 22 of the same height as the sleeve 21. The shape of the sleeve 21 can be set to a geometric shape such as a cylinder or a prism as required. The shape of the sleeve 21 is preferably for easy holding. For this reason, the size of the sleeve 21 must be within the range that can be held by a human hand. If necessary, the sleeve 21 can also be set to a shape such as a prism that can be connected to other rotators or converters in a transmission manner, so as to achieve power transmission through axial connection with other converters. An inner hole is opened on the sleeve 21 along the axial direction of the sleeve 21. The inner hole is coaxial with the sleeve 21 and is located at the center of the sleeve 21. The inner hole passes through the sleeve 21 along the axial direction. Among them, the inner hole is cylindrical, and the outer cylinder 22 is also cylindrical and the outer diameter is consistent with the diameter of the inner hole. In order to facilitate the installation of the transmission structure, a mounting cavity 23 is provided on the sleeve 21 of the outer structure 2 along the circumference of the sleeve 21 and around the outer side of the inner hole, wherein the mounting cavity 23 is directly formed along the hole wall of the inner hole and is arc-shaped, and the mounting cavity 23 penetrates the hole wall of the inner hole. The outer cylinder 22 is fixed in the inner hole by bolts or glue, and the two ends are aligned with the two ends of the sleeve 21, so that the outer cylinder 22 blocks the mounting cavity 23, and the transmission structure is installed in the mounting cavity 23 before the outer cylinder 22 is installed. In the content defined in this embodiment, a transmission cavity 221 is formed on the outer cylinder 22 along the axial direction, and the transmission cavity 221 is located at the center of the outer cylinder 22 to be coaxial with the outer cylinder 22, and the two ends of the transmission cavity 221 respectively penetrate the outer cylinder 22 along its axial direction, and the inner structure 3 is installed in the outer cylinder 22 from the transmission cavity 221.

[0027] In the content defined in this embodiment, in order to limit the position of the inner layer structure 3 after it is installed in the transmission cavity 221, and to enable the inner layer structure 3 to move and rotate in the axial direction, at least two groups of rolling auxiliary structures 24 are arranged on the inner wall of the transmission cavity 221. In this embodiment, the rolling auxiliary structures 24 are arranged in two groups and are arranged at both ends of the transmission cavity 221 in the axial direction. Each group of rolling auxiliary structures 24 includes four universal balls 241 arranged in a ring array with the center of the transmission cavity 221 as the axis. When the inner layer structure 3 is axially inserted into the transmission cavity 221, the outer wall rolls with each universal ball 241, so that the inner layer structure 3 can be axially inserted into the transmission cavity 221 and can rotate with the universal ball 241 in the transmission cavity 221. In order to prevent the inner layer structure 3 from falling out of the transmission cavity 221 before the screw 1 abuts against the corresponding screw hole, a limiting structure 222 is provided on the inner wall of the transmission cavity 221. Among them, the limiting structure 222 is fixedly arranged on the cavity wall of the transmission cavity 221 along the circumference of the transmission cavity 221. The limiting structure 222 can be a boss in the shape of a circular ring, and the inner diameter of the boss is larger than the outer diameter of the inner layer structure 3. On the outer wall of the inner layer structure 3, there is a protruding structure 33 that stops on the boss when the inner layer structure 3 penetrates the transmission cavity 221 and the two ends are aligned with the two ends of the sleeve 21. The outer diameter of the protruding structure 33 must be smaller than the diameter of the transmission cavity 221 and larger than the inner diameter of the boss. In another embodiment, the limiting structure 222 can also be a plurality of protrusions arranged in a circular array with the central axis of the transmission cavity 221 as the center. The size of the space enclosed by the inner side of each protrusion is consistent with that of the boss, which will not be described in detail here.

[0028] In another embodiment, in order to further enhance the limiting effect on the inner layer structure 3, a ring mouth 223 with an inner diameter smaller than the outer diameter of the inner layer structure 3 is formed extending inward at one end of the transmission cavity 221 away from the limiting structure 222, so that the inner layer structure 3 is supported on the ring mouth 223 after being inserted into the transmission cavity 221, and the other end of the inner layer structure 3 is flush with the end where the sleeve 21 is located.

[0029] See also Figures 1 to 5The inner structure 3 includes a cylindrical inner cylinder 31, the length and outer diameter of which are adapted to the transmission cavity 221 so as to be inserted into the transmission cavity 221 and roll with the universal ball 241. A locking cavity 32 is formed on the inner cylinder 31 for one end of the screw 1 to be inserted therein. The locking cavity 32 is a cylindrical structure and is located at the center of the inner cylinder 31 and is coaxial with the inner cylinder 31. The two ends of the locking cavity 32 respectively pass through the two ends of the inner cylinder 31 in the axial direction. A limiting tooth 321 is formed in the middle position of the locking cavity 32 and is distributed in a circular array with the center of the locking cavity 32 as the center of the circle. A limiting groove is formed at the end of the screw 1 corresponding to the limiting tooth 321. The limiting tooth 321 is a structure that gradually narrows toward the bottom side so that the limiting groove can be quickly aligned with it. The specific structure can refer to the structure of the end gear, which will not be described in detail here. The diameter of the locking cavity 32 is larger than the diameter of the screw 1, and the diameter of the inner space formed by each limiting tooth 321 needs to be smaller than the diameter of the screw 1 to limit the penetration depth of the screw 1 and lock the screw 1 so that the screw 1 cannot rotate after matching with the limiting tooth 321. The protruding structure 33 is formed on the outer wall of the inner cylinder 31.

[0030] See also Figures 1 to 3 , Figure 6 In this embodiment, the transmission structure includes a first transmission part 41 arranged on the inner layer structure 3, a second transmission part 42 arranged on the outer layer structure 2 to cooperate with the first transmission part 41, and a third transmission part 43 arranged in the installation cavity 23. The third transmission part 43 is used to switch the first transmission part 41 and the second transmission part 42 between two states of transmission contact or separation. After an external force is applied to the outer layer structure 2, the first transmission part 41 and the second transmission part 42 drive the inner layer structure 3 to rotate through rolling friction cooperation.

[0031] In this embodiment, the first transmission part 41 includes a spiral groove 411 spirally opened around the outer wall of the inner cylinder 31, wherein, after the inner cylinder 31 is installed in the transmission cavity 221, the spiral groove 411 on the inner cylinder 31 is located on the inner side of the limiting structure 222, and the spiral groove 411 is located between the two sets of rolling auxiliary structures 24, so as to facilitate the cooperation between the spiral groove 411 and the second transmission part 42. In order to prevent the inner cylinder 31 from contacting with the rolling auxiliary structure 24 after the movement of the inner cylinder 31 and affecting the use, sliding sections 311 are provided on both ends of the inner cylinder 31, and the portion between the two sliding sections 311 is defined as a matching section 312, and the spiral groove 411 is formed on the matching section 312, and the axial size of the spiral groove 411 is adapted to the sliding section 311. When the second transmission part 42 starts to cooperate with the spiral groove 411 from the top side of the spiral groove 411, the two sets of rolling auxiliary structures 24 are respectively located at the top positions of the two sliding sections 311, and when the second transmission part 42 cooperates to the bottom position of the spiral groove 411, the two sets of rolling auxiliary structures 24 are respectively located at the bottom positions of the two sliding sections 311. It should be noted that the side of the end of the entire device facing the test equipment table along the axial direction is defined as the bottom or bottom surface, and the side of the end opposite to the axial direction is defined as the top or top surface, and the screw 1 is inserted into the inner cylinder 31 from the bottom side thereof.

[0032] In this embodiment, the spiral groove 411 includes a first spiral segment 4111 and a second spiral segment 4112 which are sequentially distributed along the axial direction of the inner cylinder 31 and have opposite rotation directions. The first spiral segment 4111 and the second spiral segment 4112 are symmetrically arranged and are both located on the matching segment 312. When the screw 1 needs to be installed, only the second spiral segment 4112 needs to be used to match the second transmission part 42. When the screw 1 needs to be unscrewed, the first spiral segment 4111 needs to be used to match the second transmission part 42. The rotation direction can be adjusted by determining whether to use the first spiral segment 4111 or the second spiral segment 4112 according to the installation or removal target of the screw 1.

[0033] In this embodiment, the second transmission parts 42 are arranged in two groups corresponding to the first spiral segment 4111 and the second spiral segment 4112. The two groups of second transmission parts 42 are distributed along the axial direction at intervals and correspond to the first spiral segment 4111 and the second spiral segment 4112 along the radial direction of the inner cylinder 31, that is, one group of the second transmission parts 42 is used to cooperate with the first spiral segment 4111, and the other group of the second transmission parts 42 is used to cooperate with the second spiral segment 4112. In the content defined in this embodiment, both sets of second transmission parts 42 include a push rod 421 arranged on the outer structure 2 and a spring 422 sleeved on the push rod 421. The push rod 421 is used to extend into the spiral groove 411 to cooperate with the spiral groove 411, and the spring 422 cooperates with the third transmission part 43. When the push rod 421 is not in contact with the third transmission part 43 and is in a state of no force, the spring 422 is in a normal state and the push rod 421 is located outside the spiral groove 411; when the push rod 421 is in contact with the third transmission part 43 and is in a state of force, the spring 422 is compressed and the push rod 421 extends into the spiral groove 411. At this time, the sleeve 21 is pressed down along the axial direction, and the cooperation between the push rod 421 and the spiral groove 411 can cause the inner cylinder 31 to rotate and move upward. In order to ensure stability, each set of the second transmission part 42 has two push rods 421 and springs 422, and the two push rods 421 are arranged on two opposite sides of the outer cylinder 22.

[0034] In the content defined in this embodiment, one end of the push rod 421 has a rolling end 4211 that penetrates into the transmission cavity 221 and can extend into the spiral groove 411 after the inner layer structure 3 penetrates into the transmission cavity 221, and a head 4212 located at an end away from the rolling end 4211, the rolling end 4211 can rotate relative to the push rod 421, and the head 4212 is used to resist the spring 422 and facilitate the cooperation with the third transmission part 43. Among them, a T-shaped connecting part (not shown in the figure) can be fixedly set on the end of the rolling end 4211 close to the push rod 421, and the wide end of the connecting part faces the push rod 421. A corresponding T-shaped groove is opened at the end of the push rod 421, and the connecting part is movably connected in the T-shaped groove so that the rolling end 4211 can roll relative to the push rod 421. At the positions on the outer cylinder 22 corresponding to the tops of the first spiral segment 4111 and the second spiral segment 4112, holes are provided along the radial direction for the push rod 421 to pass through. The size of the holes is smaller than the size of the head 4212 so that the head 4212 cannot pass through. The head 4212 is located in the installation cavity 23. When in use, after the rolling end 4211 of one group of push rods 421 is inserted into the corresponding first spiral segment 4111 or second spiral segment 4112, when the outer structure 2 is pressed down in the axial direction, the rolling end 4211 and the spiral groove 411 are rolled and frictionally matched to make the inner cylinder 31 rotate relative to the outer structure 2 and move upward in the axial direction. It should be noted that the rotation and axial upward movement of the inner cylinder 31 are carried out simultaneously. After the rolling end 4211 is inserted into the spiral groove 411, the rear end surface is spaced from the inner groove surface of the spiral groove 411.

[0035] In this embodiment, the spring 422 is sleeved on the push rod 421 and the two ends are respectively against the inner cavity wall of the installation cavity 23 and the head 4212. When the push rod 421 is not under stress, the spring 422 is in a normal state and the rolling end 4211 is located outside the spiral groove 411. When the push rod 421 is under stress, the spring 422 is compressed and the rolling end 4211 extends toward the transmission cavity 221. When the inner cylinder 31 is installed in place, the rolling end 4211 in this state can extend into the spiral groove 411 after being aligned with the spiral groove 411; when the spring 422 in the compressed state is not squeezed at the head 4212, the spring 422 rebounds to reset the push rod 421 and drive the rolling end 4211 to move out of the spiral groove 411.

[0036] See also Figures 1 to 3 , Figure 6 The third transmission part 43 is arranged in the installation cavity 23 corresponding to the head 4212 of each push rod 421. The third transmission part 43 is used to switch the push rod 421 between the stressed state and the unstressed state. For the convenience of distinction, the group of push rods 421 located at the top is defined as the first group of push rods 421, and the group of push rods 421 located at the bottom is defined as the second group of push rods 421. The third transmission part 43 cooperates with the push rod 421 to have three working states. The first type: the third transmission part 43 cooperates with the first group of push rods 421 to squeeze this group of push rods 421 so that they cooperate with the first spiral segment 4111. At this time, the second group of push rods 421 are in an unstressed state; the second type: the third transmission part 43 cooperates with the second group of push rods 421 to squeeze this group of push rods 421 so that they cooperate with the second spiral segment 4112. At this time, the first group of push rods 421 are in an unstressed state; the third type: the third transmission part 43 does not cooperate with any group of push rods 421, so that the first group and the second group of push rods 421 are both in an unstressed state, and the rolling end 4211 in the unstressed state is outside the moving range of the inner cylinder 31, which is convenient for taking and putting the inner cylinder 31.

[0037] In this embodiment, the third transmission part 43 includes an operating plate 431 which is slidably arranged in the installation cavity 23 along the axial direction of the outer layer structure 2, a trigger part 432 connected to the side of the operating plate 431 facing the transmission cavity 221, and a push switch 433 connected to the operating plate 431 and exposed outside the outer layer structure 2. The operating plate 431 provides support for the trigger part 432. The trigger part 432 is set to two corresponding to the push rod 421 and the two push rods 421 corresponding to each group of the second transmission part 42 are arranged on the opposite sides of the outer cylinder 22. The trigger part 432 is used to squeeze the push rod 421 so that the rolling end 4211 can extend into the spiral groove 411. The push switch 433 drives the operating plate 431 and the trigger part 432 to slide along the axial direction by sliding along the axial direction, thereby switching the state of the push rod 421.

[0038] In the content defined in this embodiment, the operating plate 431 is an arc-shaped sheet structure and the curvature is consistent with the curvature of the cavity wall on the side of the installation cavity 23 away from the outer cylinder 22. In this embodiment, the axial size of the operating plate 431 is smaller than the axial size of the installation cavity 23. A slider 4311 extending radially inward along the outer cylinder 22 is fixedly connected to the inner side of the operating plate 431, and a TT-shaped end 4312 is formed on the end of the slider 4311 away from the operating plate 431. A first slide groove 224 with a T-shaped cross section is correspondingly formed on the outer wall of the outer cylinder 22, and the first slide groove 224 has a sliding space for sliding in the axial direction, so that the operating plate 431 can slide in the axial direction relative to the outer structure 2. The number of the slider 4311 and the first slide groove 224 is set to at least two to ensure stability. In another embodiment, a slide rail distributed along the axial direction may be provided on the operating plate 431 , and a corresponding second slide groove may be provided on the mounting cavity 23 , so that the slide rail is slidably provided in the second slide groove to realize the sliding fit between the operating plate 431 and the sleeve 21 .

[0039] In the content defined in this embodiment, the two triggering parts 432 are fixedly connected to the inner side wall of the operating plate 431 and are arranged respectively opposite to the two push rods 421 located on the same side of the first group of push rods 421 and the second group of push rods 421. The two triggering parts 432 have a guide section 4321 distributed along the axial direction of the outer layer structure 2 for gradually squeezing the head 4212 of the push rod 421 and a contact section 4322 for abutting the head 4212 of the push rod 421 to make it in a stressed state. The guide sections 4321 are provided in two and are inclined relative to the axial direction. The two guide sections 4321 are symmetrically arranged on both sides of the contact section 4322 along the axial direction of the outer layer structure 2, so that the triggering part 432 is in a trapezoidal shape that is narrow inward and wide outward, and the two guide sections 4321 are distributed corresponding to the two waists of the trapezoid.

[0040] The abutment section 4322 is narrower than the spacing between the two groups of push rods 421, so that the installation cavity 23 has a window space in which the abutment section 4322 of the trigger portion 432 is offset from the distribution of each push rod 421. The window space is usually the space between the two groups of push rods 421. When the abutment section 4322 is completely located in the window space between the two groups of push rods 421, the two groups of push rods 421 are in a state of no force, and when the abutment section 4322 abuts against one of the groups of push rods 421, the abutted push rod 421 is in a state of force and the rolling end 4211 can extend into the spiral groove 411. At this time, a part of the abutment section 4322 is not in the window space.

[0041] In the content defined in this embodiment, the push switch 433 is fixedly connected to the side surface of the operating plate 431 facing away from the outer tube 22, and a toggle hole 211 connected to the mounting cavity 23 is opened at a position of the sleeve 21 corresponding to the push switch 433. The push switch 433 movably extends into the toggle hole 211, and the axial dimension of the toggle hole 211 of the outer tube 22 is larger than the axial dimension of the push switch 433 of the outer tube 22, so that the push switch 433 can slide in the toggle hole 211.

[0042] The working method of one embodiment of the rotator for installing the screw rod 1 of the present invention is as follows: first, the top end of the screw rod 1 is passed through the ring opening 223 and into the locking cavity 32, and the screw rod 1 is meshed and locked therewith by the limit tooth 321. When the screw rod 1 needs to be screwed into the screw hole, the second spiral segment 4112 is selected as the spiral groove 411 to be used, and the switch 433 is pushed by sliding axially to make the guide segment 4321 at the top gradually approach the head 4212 of the second group of push rods 421. After contacting the head 4212, the guide segment 4321 guides it to move radially inward under extrusion, and the spring 422 is in a compressed state until the head 4212 abuts against the abutting segment 4322. At this time, the top side of the operating plate 431 abuts against The top side of the installation cavity 23, during this process, the rolling end 4211 gradually penetrates into the second spiral segment 4112. If the rolling end 4211 cannot penetrate therein due to not aligning with the second spiral segment 4112 at this time, it can be adjusted by rotating the inner cylinder 31 until the rolling end 4211 penetrates therein; after the screw 1 is aligned with the screw hole opening of the test equipment table, the outer structure 2 is pressed down to apply a downward force to the push rod 421. Since the rolling end 4211 can rotate, under the action of the force, the rolling end 4211 rolls and rubs with the second spiral segment 4112 to rotate the inner cylinder 31 and move upward relative to the outer structure 2, thereby driving the screw 1 to rotate, so that the screw 1 is gradually screwed into the screw hole, and then the screw 1 can be separated by moving upward along the axial direction. When it is necessary to unscrew the screw 1, slide and push the switch 433 to make the abutment section 4322 gradually abut against the first group of push rods 421. When the abutment section 4322 abuts against the head 4212 of the push rod 421 at the bottom position, the bottom side of the operating plate 431 abuts against the bottom side of the installation cavity 23, and the rolling end 4211 of the push rod 421 at the bottom extends into the first spiral section 4111. Then, the outer layer structure 2 is still pressed downward to drive the screw 1 to rotate in the opposite direction to unscrew the screw 1.

[0043] Compared with the prior art, the rotator for installing the screw 1 of the present invention only needs to provide an axial downward force to rotate the screw 1 and screw it into the screw hole. Compared with the prior art, the operation is simplified to reduce labor intensity through force transmission, and there is no need to install an additional power device, thereby improving the convenience of installation and disassembly of the screw 1.

Claims

1. A rotator for screw installation, characterized in that: It includes an outer layer structure and an inner layer structure movably arranged in the outer layer structure. A locking cavity is formed in the inner layer structure for one end of the screw to pass through and has limiting teeth for locking the screw. A transmission structure is arranged between the outer layer structure and the inner layer structure, which drives the inner layer structure to rotate by pressing down the outer layer structure.

2. The rotator for screw installation according to claim 1, characterized in that: The transmission structure comprises a first transmission part arranged on the inner layer structure and a second transmission part arranged on the outer layer structure to cooperate with the first transmission part in transmission.

3. The rotator for screw installation according to claim 2, characterized in that: The outer layer structure is formed with a transmission cavity opened along the axial direction, the inner layer structure is coaxially movably arranged in the transmission cavity along its axial direction and cooperates with the transmission cavity to rotate on its own, and the first transmission part and the second transmission part drive the inner layer structure to rotate through rolling friction cooperation in the transmission cavity.

4. The rotator for screw installation according to claim 3, characterized in that: The first transmission part includes a spiral groove spirally opened around the outer wall of the inner layer structure; the second transmission part includes a push rod arranged on the outer layer structure, the push rod has a rolling end that penetrates into the transmission cavity and can extend into the spiral groove after the inner layer structure penetrates into the transmission cavity, the rolling end can rotate relative to the push rod, and when the outer layer structure is pressed downward in the axial direction, the rolling end and the spiral groove rolling friction cooperate to make the inner layer structure rotate relative to the outer layer structure and move axially.

5. The rotator for screw installation according to claim 4, characterized in that: The outer layer structure is formed with a mounting cavity which is circumferentially arranged on the outside of the transmission cavity, and the end of the push rod away from the rolling end radially penetrates into the mounting cavity and has a head; the second transmission part also includes a spring which is sleeved on the push rod and whose two ends respectively abut against the inner cavity wall and the head of the mounting cavity; when the push rod is in a state without force, the spring is in a normal state and the rolling end is located outside the spiral groove, and when the push rod is in a state under force, the spring is compressed and the rolling end can extend into the spiral groove.

6. The rotator for screw installation according to claim 5, characterized in that: The transmission structure further comprises a third transmission part arranged in the installation cavity, and the third transmission part is used to switch the push rod between a stressed state and a non-stressed state.

7. The rotator for screw installation according to claim 6, characterized in that: The third transmission part switches the state of the push rod by sliding along the axial direction of the outer layer structure.

8. The rotator for screw installation according to claim 7, characterized in that: The third transmission part includes an operating plate slidably arranged in the installation cavity along the axial direction of the outer layer structure, a trigger part connected to the side of the operating plate facing the transmission cavity, and a push switch connected to the operating plate and exposed outside the outer layer structure; the trigger part has a guide section distributed along the axial direction of the outer layer structure for gradually squeezing the push rod head and an abutting section for abutting the push rod head to put it in a stressed state.

9. The rotator for screw installation according to claim 8, characterized in that: The spiral groove includes a first spiral segment and a second spiral segment which are sequentially distributed along the axial direction of the inner layer structure and have opposite rotation directions. The push rods are correspondingly arranged in two groups to correspond to the first spiral segment and the second spiral segment respectively along the radial direction. The installation cavity has a window space which makes the trigger part offset in the push rod distribution so that the push rod is in a stress-free state. The trigger part is used to put one group of push rods in a stress-bearing state.

10. The rotator for screw installation according to claim 9, characterized in that: The guide sections are provided in two and are inclined relative to the axial direction. The two guide sections are symmetrically arranged on both sides of the abutment section along the axial direction of the outer layer structure, and the abutment section is narrower than the spacing between the two groups of push rods.

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