Rotator for screw installation

Abstract

The utility model relates to the field of test auxiliary equipment, and discloses a rotator used for installing a screw rod, which 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 rod 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] This utility model relates to the field of experimental auxiliary equipment, and in particular to a rotator for screw mounting. Background Technology

[0002] In mechanical tests such as vibration and mechanical impact tests, products need to be rigidly fixed to the test equipment platform. To achieve this, screws are typically used to assist in securing the product. The screws are screwed into the test equipment platform, and then a clamping strip and nut are used to press the product firmly onto the platform for testing. In actual testing, the operator can only manually screw the screws one by one into the corresponding holes on the test equipment platform. Because the platform's holes are deep, a large number of screws need to be screwed in, and different lengths of screws are required due to varying product sizes. Manual rotation is not only inefficient, but also causes arm fatigue and weakness. Therefore, installing the screws onto the test equipment platform consumes a significant amount of time, impacting testing efficiency. Utility Model Content

[0003] In view of the shortcomings of the prior art, the technical problem to be solved by this utility model is to provide a rotator for screw installation to solve the problem of operator discomfort and reduced test efficiency caused by manually rotating and screwing in the screw.

[0004] To solve the above-mentioned technical problems, the present invention provides a rotator for screw mounting, comprising an outer layer structure and an inner layer structure movably disposed within the outer layer structure. The inner layer structure has a locking cavity for one end of the screw to pass through and be locked therein. A transmission structure is provided 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 disposed on the inner layer structure and a second transmission part disposed on the outer layer structure to drive and cooperate with the first transmission part.

[0006] Furthermore, the outer layer structure has a transmission cavity formed along the axial direction, and the inner layer structure is coaxially and movably inserted into the transmission cavity along its axial direction and rotates in cooperation with the transmission cavity to be able to rotate. The first transmission part and the second transmission part drive the inner layer structure to rotate in the transmission cavity through rolling friction cooperation.

[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 disposed on the outer layer structure, the push rod having 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 being able to rotate relative to the push rod, and when the outer layer structure is pressed down axially, the rolling end and the spiral groove roll and rub together, causing the inner layer structure to rotate relative to the outer layer structure and move axially.

[0008] Furthermore, the outer structure has a mounting cavity formed circumferentially around the outside of the transmission cavity, and the end of the push rod away from the rolling end enters the mounting cavity radially and has a head; the second transmission part also includes a spring sleeved on the push rod with its two ends abutting against the inner wall of the mounting cavity and the head, respectively; when the push rod is in a stress-free state, the spring is in a normal state and the rolling end is located outside the helical groove; when the push rod is under stress, the spring is compressed and the rolling end can extend into the helical groove.

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

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

[0011] Furthermore, the third transmission unit includes an operating plate that is slidably disposed in the mounting cavity along the axial direction of the outer layer structure, a triggering 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 triggering part has a guide section distributed along the axial direction of the outer layer structure for gradually pressing the push rod head and an abutting section for resisting the push rod head to make it in a stressed state.

[0012] Furthermore, the spiral groove includes a first spiral segment and a second spiral segment that are sequentially distributed along the axial direction of the inner layer structure and have opposite spiral directions. The push rods are correspondingly arranged in two sets to correspond to the first spiral segment and the second spiral segment in the radial direction, respectively. The mounting cavity has a window space that allows the trigger part to be misaligned with the push rod distribution so that the push rods are in a state of no force. The trigger part is used to put one set of push rods in a state of force.

[0013] Furthermore, the guide section is configured as two sections and is 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 distance between the two sets of push rods.

[0014] The rotary device for screw installation of this utility model has at least the following beneficial effects: After the screw is locked onto 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 inserted into the screw hole on the test equipment platform. Then, only a downward pressure is needed after holding the outer layer structure, and 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 rotating the screw. Attached Figure Description

[0015] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0016] Figure 1 This is a schematic diagram of the structure of the rotator and screw of this utility model;

[0017] Figure 2 This is a schematic diagram of the structure of the rotator of this utility model (partially cut out);

[0018] Figure 3 This is a front structural diagram of the rotator (section view) and screw of this utility model.

[0019] Figure 4 This is a cross-sectional view of the inner layer structure of this utility model in conjunction with the screw.

[0020] Figure 5 This is an exploded view of the inner structure (partial, cross-sectional view) and screw (partial view) of this utility model;

[0021] Figure 6 This is a partial top view of the outer cylinder and the third transmission part of this utility model.

[0022] The meanings of the labels in the attached diagram are as follows:

[0023] Screw 1, outer structure 2, sleeve 21, actuating hole 211, outer cylinder 22, transmission cavity 221, limiting structure 222, ring 223, first sliding groove 224, mounting cavity 23, rolling auxiliary structure 24, universal ball 241, inner structure 3, inner cylinder 31, sliding section 311, mating 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 Implementation

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

[0025] Please see Figures 1 to 6 The rotary device for screw installation of this utility model includes an outer layer structure 2, an inner layer structure 3 movably disposed within the outer layer structure 2, and a transmission structure disposed 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 relative to the inner layer structure 3 and cannot move downward along the axial direction. 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 when the end of the screw 1 away from the inner layer structure 3 abuts against the screw hole opening on the test equipment platform, it can drive the inner layer structure 3 to rotate. The inner layer structure 3 then drives the screw 1, which is locked by the air, to rotate, so as to convert the applied axial force into tangential force, making the operation simpler, greatly reducing the labor intensity of the operator, and improving work efficiency.

[0026] Please see 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 needed. The shape of the sleeve 21 is primarily for ease of gripping, so the size of the sleeve 21 must be within the range that a person can hold. If necessary, the sleeve 21 can also be set to a shape such as a prism that can be driven and connected to other rotators or converters to achieve power transmission through shaft connection with other converters. An inner hole is formed on the sleeve 21 along the axial direction of the sleeve 21. The inner hole is coaxial with the sleeve 21 and located at the center of the sleeve 21, and the inner hole extends through the sleeve 21 axially. The inner hole is cylindrical, and the outer cylinder 22 is also cylindrical with the same outer diameter as the inner hole. To facilitate the installation of the transmission structure, an installation cavity 23 is formed on the sleeve 21 of the outer layer structure 2, which is circumferentially arranged around the outer side of the inner hole. The installation cavity 23 is formed directly along the wall of the inner hole and is arc-shaped, penetrating the wall of the inner hole. The outer cylinder 22 is fixed in the inner hole by bolts or glue, with both ends aligned with the ends of the sleeve 21, so that the outer cylinder 22 blocks the installation cavity 23. The transmission structure is installed in the installation cavity 23 before the outer cylinder 22 is installed. In this embodiment, an axially oriented transmission cavity 221 is formed on the outer cylinder 22. The transmission cavity 221 is located at the center of the outer cylinder 22 and is coaxial with the outer cylinder 22. Both ends of the transmission cavity 221 penetrate the outer cylinder 22 axially. The inner layer structure 3 is installed in the outer cylinder 22 from the transmission cavity 221.

[0027] In this embodiment, to ensure that the inner layer structure 3 is positioned within the transmission cavity 221 after installation, and to allow it to move and rotate axially, at least two sets of axially spaced rolling auxiliary structures 24 are provided on the inner wall of the transmission cavity 221. In this embodiment, the rolling auxiliary structures 24 are arranged in two sets, axially positioned at both ends of the transmission cavity 221. Each set of rolling auxiliary structures 24 includes four universal balls 241 arranged in a circular array around the center of the transmission cavity 221. When the inner layer structure 3 passes through the transmission cavity 221 axially, its outer wall rolls in contact with each universal ball 241, allowing the inner layer structure 3 to move axially within the transmission cavity 221 and rotate in conjunction with the universal balls 241. 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 opening, a limiting structure 222 is provided on the inner wall of the transmission cavity 221. The limiting structure 222 is fixedly disposed on the cavity wall of the transmission cavity 221 along the circumference of the transmission cavity 221. The limiting structure 222 can be a ring-shaped boss, 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 abuts against the boss when the inner layer structure 3 penetrates the transmission cavity 221 and its 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 ring 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 the same as that of the boss, which will not be described in detail here.

[0028] In another embodiment, in order to further enhance the restriction effect on the inner layer structure 3, an annular opening 223 with an inner diameter smaller than the outer diameter of the inner layer structure 3 is formed at the end port of the transmission cavity 221 away from the limiting structure 222, so that the inner layer structure 3 is supported on the annular opening 223 after passing through the transmission cavity 221, and the other end of the inner layer structure 3 is flush with the end of the sleeve 21.

[0029] Please see Figures 1 to 5The inner structure 3 includes a cylindrical inner cylinder 31. The length and outer diameter of the inner cylinder 31 are adapted to the transmission cavity 221 so that it passes through the transmission cavity 221 and rolls with the universal ball 241. A locking cavity 32 is formed on the inner cylinder 31 for one end of the screw 1 to pass through. The locking cavity 32 is cylindrical and located at the center of the inner cylinder 31 and coaxial with the inner cylinder 31. The two ends of the locking cavity 32 extend axially through both ends of the inner cylinder 31. At the middle position of the locking cavity 32, a limiting tooth 321 is formed in a circular array with the center of the locking cavity 32 as the center. At the end of the screw 1, a limiting groove is formed corresponding to the limiting tooth 321. The limiting tooth 321 has a structure that gradually narrows towards the bottom to facilitate quick alignment with the limiting groove. The specific structure can be referred to the structure of the end face gear, and will not be described in detail here. The diameter of the locking cavity 32 is larger than the diameter of the screw 1, while the diameter of each limiting tooth 321 located in the formed inner space must be smaller than the diameter of the screw 1 to limit the penetration depth of the screw 1, and to lock the screw 1 so that the screw 1 cannot rotate after engaging with the limiting tooth 321. The protruding structure 33 is formed on the outer wall of the inner cylinder 31.

[0030] Please see Figures 1 to 3 , Figure 6 In this embodiment, the transmission structure includes a first transmission part 41 disposed on the inner layer structure 3, a second transmission part 42 disposed on the outer layer structure 2 for transmission cooperation with the first transmission part 41, and a third transmission part 43 disposed in the mounting 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 the outer layer structure 2 is subjected to external force, 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 formed around the outer wall of the inner cylinder 31. 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 inward side of the limiting structure 222, and the spiral groove 411 is located between the two sets of rolling auxiliary structures 24 to facilitate the engagement between the spiral groove 411 and the second transmission part 42. To avoid the spiral groove 411 contacting the rolling auxiliary structure 24 after the inner cylinder 31 moves, thus affecting its use, sliding sections 311 are provided at both ends of the inner cylinder 31. The portion between the two sliding sections 311 is defined as a mating section 312, and the spiral groove 411 is formed on the mating section 312. The axial dimension of the spiral groove 411 is adapted to the sliding section 311. When the second transmission part 42 engages with the spiral groove 411 from the top side, the two sets of rolling auxiliary structures 24 are located at the top of the two sliding sections 311 respectively. When the second transmission part 42 engages with the spiral groove 411 to the bottom, the two sets of rolling auxiliary structures 24 are located at the bottom of the two sliding sections 311 respectively. It should be noted that the side of the entire device facing the test equipment platform along the axial direction is defined as the bottom or bottom surface, while the side facing the opposite direction along the axial direction is defined as the top or top surface. The screw 1 passes through the inner cylinder 31 from the bottom side.

[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 both are located on the mating section 312. When the screw 1 needs to be installed, only the second spiral segment 4112 needs to be used to engage with the second transmission part 42. When the screw 1 needs to be unscrewed, the first spiral segment 4111 is used to engage with 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 part 42 is configured as two sets corresponding to the first helical segment 4111 and the second helical segment 4112. The two sets of second transmission parts 42 are distributed axially and respectively correspond to the first helical segment 4111 and the second helical segment 4112 radially along the inner cylinder 31. That is, one set of second transmission parts 42 is used to cooperate with the first helical segment 4111, and the other set of second transmission parts 42 is used to cooperate with the second helical segment 4112. In this embodiment, both sets of second transmission parts 42 include push rods 421 mounted on the outer structure 2 and springs 422 sleeved on the push rods 421. The push rods 421 extend into the spiral grooves 411 to engage with them, while the springs 422 engage with the third transmission part 43. When the push rods 421 are not in contact with the third transmission part 43 and are not under stress, the springs 422 are in their normal state, and the push rods 421 are outside the spiral grooves 411. When the push rods 421 are in contact with the third transmission part 43 and are under stress, the springs 422 are compressed, and the push rods 421 extend into the spiral grooves 411. At this time, pressing the sleeve 21 axially downwards can cause the inner cylinder 31 to rotate and move upwards through the engagement of the push rods 421 and the spiral grooves 411. To ensure stability, each set of second transmission parts 42 has two push rods 421 and two springs 422, with the two push rods 421 positioned on opposite sides of the outer cylinder 22.

[0034] In this embodiment, the push rod 421 has a rolling end 4211 that penetrates into the transmission cavity 221 and extends into the spiral groove 411 after the inner layer structure 3 penetrates into the transmission cavity 221, and a head 4212 located at the 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 abut against the spring 422 and facilitates cooperation with the third transmission part 43. A T-shaped connecting part (not shown in the figure) can be fixedly provided on the end of the rolling end 4211 near the push rod 421, with the wider end of the connecting part facing the push rod 421. A corresponding T-shaped groove is formed 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. On the outer cylinder 22, at positions corresponding to the tops of the first helical segment 4111 and the second helical segment 4112, radial holes are provided 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, and the head 4212 is located within the mounting cavity 23. In use, when the rolling end 4211 of one set of push rods 421 is inserted into the corresponding first helical segment 4111 or second helical segment 4112, and the outer layer structure 2 is pressed down axially, the rolling end 4211 and the helical groove 411 engage in rolling friction, causing the inner cylinder 31 to rotate relative to the outer layer structure 2 and move axially upward. It should be noted that the rotation and upward axial movement of the inner cylinder 31 occur simultaneously. The rear end face of the rolling end 4211 extending into the helical groove 411 is spaced apart from the inner groove surface of the helical groove 411.

[0035] In this embodiment, the spring 422 is sleeved on the push rod 421, with its two ends abutting against the inner wall of the mounting cavity 23 and the head 4212, respectively. When the push rod 421 is not under force, the spring 422 is in its normal state and the rolling end 4211 is located outside the spiral groove 411. When the push rod 421 is under force, the spring 422 is compressed and the rolling end 4211 extends into the transmission cavity 221. After the inner cylinder 31 is installed in place, the rolling end 4211 in this state can extend into the spiral groove 411 after aligning with it. When the compressed spring 422 is no longer compressed at the head 4212, the spring 422 rebounds, causing the push rod 421 to reset and driving the rolling end 4211 to move out of the spiral groove 411.

[0036] Please see Figures 1 to 3 , Figure 6 The third transmission unit 43 is disposed in the mounting cavity 23 corresponding to the head 4212 of each push rod 421. The third transmission unit 43 is used to switch the push rod 421 between a stressed state and an unstressed state. For easy 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 unit 43 cooperates with the push rod 421 to have three working states. The first configuration involves the third transmission unit 43 cooperating with the first set of push rods 421 to press the push rods 421 together, making them engage with the first spiral segment 4111. At this time, the second set of push rods 421 is in an unloaded state. The second configuration involves the third transmission unit 43 cooperating with the second set of push rods 421 to press the push rods 421 together, making them engage with the second spiral segment 4112. At this time, the first set of push rods 421 is in an unloaded state. The third configuration involves the third transmission unit 43 not cooperating with any set of push rods 421, so that both the first and second sets of push rods 421 are in an unloaded state. The unloaded rolling end 4211 is outside the movement range of the inner cylinder 31, which facilitates the taking and placing of the inner cylinder 31.

[0037] In this embodiment, the third transmission unit 43 includes an operation plate 431 that is slidably disposed in the mounting cavity 23 along the axial direction of the outer layer structure 2, a trigger part 432 connected to the side of the operation plate 431 facing the transmission cavity 221, and a push switch 433 connected to the operation plate 431 and exposed outside the outer layer structure 2. The operation plate 431 provides support for the trigger part 432. The trigger part 432 is configured as two push rods 421, and the two push rods 421 corresponding to each group of second transmission units 42 are respectively disposed on 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 operation plate 431 and the trigger part 432 to slide axially by sliding along the axial direction, thereby switching the state of the push rod 421.

[0038] In this embodiment, the operating plate 431 has an arc-shaped sheet structure, and its curvature matches the curvature of the cavity wall of the mounting cavity 23 away from the outer cylinder 22. In this embodiment, the axial dimension of the operating plate 431 is smaller than the axial dimension of the mounting 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. A TT-shaped end 4312 is formed on the end of the slider 4311 away from the operating plate 431. A first groove 224 with a T-shaped cross-section is correspondingly formed on the outer wall of the outer cylinder 22, and the first groove 224 has a sliding space for sliding axially, so that the operating plate 431 can slide axially relative to the outer structure 2. The number of sliders 4311 and first grooves 224 is set to at least two to ensure stability. In another embodiment, a slide rail distributed along the axial direction can be provided on the operation plate 431, and a corresponding second slide groove can be opened on the mounting cavity 23, so that the slide rail is slidably set in the second slide groove to realize the sliding cooperation between the operation plate 431 and the sleeve 21.

[0039] In this embodiment, both trigger portions 432 are fixedly connected to the inner wall of the operation plate 431 and are arranged on the same side as the first set of push rods 421 and the second set of push rods 421, respectively. Each trigger portion 432 has a guide section 4321 distributed along the axial direction of the outer structure 2 for gradually pressing the head 4212 of the push rod 421, and an abutting section 4322 for pressing against the head 4212 of the push rod 421 to bring it into a stressed state. Two guide sections 4321 are provided and inclined relative to the axial direction. The two guide sections 4321 are symmetrically distributed on both sides of the abutting section 4322 along the axial direction of the outer structure 2, so that the trigger portion 432 has a trapezoidal shape that is narrower inwards and wider outwards, with the two guide sections 4321 corresponding to the two sides of the trapezoid.

[0040] The abutting section 4322 is narrower than the distance between the two sets of push rods 421, so that the mounting cavity 23 has a window space in which the abutting section 4322 of the trigger part 432 is misaligned with the distribution of each push rod 421. The window space is usually the space between the two sets of push rods 421. When the abutting section 4322 is completely located in the window space between the two sets of push rods 421, both sets of push rods 421 are in a state of no force. When the abutting section 4322 abuts against one of the sets of push rods 421, the abutting push rod 421 is in a state of force and the rolling end 4211 can extend into the spiral groove 411. At this time, part of the abutting section 4322 is not in the window space.

[0041] In this embodiment, the push switch 433 is fixedly connected to the side of the operating plate 431 facing away from the outer cylinder 22. A toggle hole 211 communicating with the mounting cavity 23 is provided on the sleeve 21 at the position corresponding to the push switch 433. The push switch 433 extends movably into the toggle hole 211. The size of the toggle hole 211 in the axial direction of the outer cylinder 22 is larger than the size of the push switch 433 in the axial direction of the outer cylinder 22, so that the push switch 433 can slide in the toggle hole 211.

[0042] The working method of one embodiment of the rotary device for screw installation of this utility model is as follows: First, the top end of the screw 1 is passed through the annular opening 223 and into the locking cavity 32. The screw 1 is locked by engaging with the locking tooth 321. When it is necessary to screw the screw 1 into the screw hole, the second helical segment 4112 is selected as the helical groove 411. By sliding the switch 433 axially, the guide segment 4321 located at the top gradually approaches the head 4212 of the second set of push rods 421. After contacting the head 4212, the guide segment 4321 guides it to move radially inward under compression. 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... On the top side of the mounting cavity 23, during this process, the rolling end 4211 gradually penetrates into the second helical section 4112. If the rolling end 4211 cannot penetrate into the second helical section 4112 due to misalignment, it can be adjusted by rotating the inner cylinder 31 until the rolling end 4211 penetrates into it. After aligning the screw 1 with the screw hole opening on the test equipment platform, the outer layer 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 against the second helical section 4112, causing the inner cylinder 31 to rotate and move upward relative to the outer layer structure 2, thereby driving the screw 1 to rotate so that the screw 1 is gradually screwed into the screw hole. Then, it can be separated by moving upward along the axial direction. When it is necessary to unscrew screw 1, slide and push switch 433 to make the abutment section 4322 gradually press against the first set of push rods 421. When the abutment section 4322 abuts against the head 4212 of the push rod 421 located at the bottom, the bottom side of the operating plate 431 abuts against the bottom side of the mounting cavity 23. The rolling end 4211 of the push rod 421 located at the bottom extends into the first spiral section 4111. Then it still presses down on the outer layer structure 2, driving the screw 1 to rotate in the opposite direction to unscrew screw 1.

[0043] Compared with the prior art, the rotary device for screw installation of this utility model only requires an axial downward force to rotate the screw 1 and screw it into the screw hole. Compared with the prior art, it simplifies the operation, reduces labor intensity by force transmission, eliminates the need for an additional power device, and improves the convenience of screw installation and disassembly.

Claims

1. A rotator for screw mounting, characterized in that: It includes an outer layer structure and an inner layer structure movably disposed within the outer layer structure. The inner layer structure has a locking cavity formed therein for one end of a screw to pass through and be locked therein. A transmission structure is provided between the outer layer structure and the inner layer structure, which drives the inner layer structure to rotate by pressing down on the outer layer structure.

2. The rotary device for screw mounting as described in claim 1, characterized in that: The transmission structure includes a first transmission part disposed on the inner layer structure and a second transmission part disposed on the outer layer structure to drive and cooperate with the first transmission part.

3. The rotary device for screw mounting as described in claim 2, characterized in that: The outer layer structure has a transmission cavity formed along the axial direction. The inner layer structure is coaxially and movably inserted into the transmission cavity along its axial direction and rotates with the transmission cavity to be able to rotate. The first transmission part and the second transmission part drive the inner layer structure to rotate through rolling friction within the transmission cavity.

4. The rotary device for screw mounting as described in 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 disposed on the outer layer structure, the push rod having 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 being rotatable relative to the push rod, and when the outer layer structure is pressed down axially, the rolling end and the spiral groove engage in rolling friction to cause the inner layer structure to rotate relative to the outer layer structure and move axially.

5. The rotary device for screw mounting as described in claim 4, characterized in that: The outer structure has a mounting cavity formed around it circumferentially outside the transmission cavity. The end of the push rod away from the rolling end enters the mounting cavity radially and has a head. The second transmission part also includes a spring sleeved on the push rod with its two ends abutting against the inner wall of the mounting cavity and the head, respectively. When the push rod is not under force, the spring is in a normal state and the rolling end is located outside the spiral groove. When the push rod is under force, the spring is compressed and the rolling end can extend into the spiral groove.

6. The rotary device for screw mounting as described in claim 5, characterized in that: The transmission structure also includes a third transmission part disposed in the mounting cavity, which is used to switch the push rod between a stressed state and a non-stressed state.

7. The rotary device for screw mounting as described in claim 6, characterized in that: The third transmission unit switches the state of the push rod by sliding along the axial direction of the outer structure.

8. The rotary device for screw mounting as described in claim 7, characterized in that: The third transmission unit includes an operating plate that is slidably disposed in the mounting cavity along the axial direction of the outer layer structure, a triggering 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 triggering part has a guide section distributed along the axial direction of the outer layer structure for gradually pressing the push rod head and an abutting section for pressing against the push rod head to make it in a stressed state.

9. The rotary device for screw mounting as described in claim 8, characterized in that: The spiral groove includes a first spiral segment and a second spiral segment that are sequentially distributed along the axial direction of the inner layer structure and have opposite spiral directions. The push rods are configured in two sets to correspond to the first spiral segment and the second spiral segment respectively in the radial direction. The mounting cavity has a window space that allows the trigger part to be misaligned with the push rod distribution so that the push rods are in a state of no force. The trigger part is used to put one set of push rods in a state of force.

10. The rotary device for screw mounting as described in claim 9, characterized in that: The guide section is configured as two sections and is 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 distance between the two sets of push rods.

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