Variable diameter cylindrical compression device

Abstract

The variable diameter cylinder compression device comprises a box body, a clamping jaw, a disc and a driving mechanism, the top surface of the box body is provided with a plurality of radially extending slides, and each slide is slidably connected with a clamping jaw; the clamping jaw comprises a jaw body, a jaw base and a transmission mechanism, the bottom surface of the jaw body is provided with a mounting groove, the jaw body is provided with a plurality of arc-shaped side clamping surfaces with different radii, and the top surface of the jaw base is provided with a slide groove which extends radially and is uniformly distributed in the circumferential direction; the transmission mechanism comprises an intermittent pushing gear, a transmission shaft and a first gear and a second gear connected to the transmission shaft, when the intermittent pushing gear rotates to drive the eccentric pushing rod to rotate, the eccentric pushing rod can slide out of one slide groove and then slide into the next slide groove, thereby intermittently pushing the jaw body to rotate by an angle and converting the arc-shaped side clamping surface of the jaw body towards the center; when the disc rotates, the transmission shaft rotates at the same time to drive the jaw body to move radially along the slide under the action of the arc-shaped rack. The variable diameter cylinder compression device can clamp and fix cylinders with various diameters and has good centering.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of clamp equipment, in particular to a variable-diameter cylinder compression device. BACKGROUND

[0002] The maximum load that a cylinder sample can bear when reaching failure under the action of axial compression is called the axial load of the cylinder. The maximum compressive stress that a cylinder sample can bear under the action of uniaxial compression load is called the uniaxial compressive strength. When the cylinder sample appears compression failure under the action of axial compression, the stress borne by the whole cylinder, that is, the maximum load and the area of the sample perpendicular to the loading direction when the sample fails.

[0003] The uniaxial compression deformation experiment of a composite material cylinder is to measure the elastic modulus, stress and strain, buckling and other data of the sample in each direction under the action of axial compression, to obtain the stress-strain curve of the cylinder sample, and to obtain the deformation characteristics of the composite material cylinder. The characteristic indexes for characterizing the deformation of the composite material cylinder mainly include the elastic modulus and Poisson's ratio in each direction. According to the stress-strain curve, the axial elastic modulus, hoop elastic modulus, radial elastic modulus and Poisson's ratio can be defined.

[0004] Before compression, the sample needs to be accurately installed in the clamp, that is, to ensure good centering of the sample in the clamp, otherwise the sample will be unevenly stressed, stress concentration will occur, and the accuracy of the experiment will be seriously affected. At present, most compression clamps cannot guarantee the centering of the cylinder sample during installation, so during the compression of the cylinder, the cylinder is in an eccentric state relative to the center of the testing machine. During the compression process, the sample may be ejected and dangerous. Secondly, most of the current compression clamps with good centering are only suitable for single-diameter cylinders. If multiple-diameter cylinder experiments are needed during the experiment, more similar clamps are needed, which will bring great inconvenience and increase the experimental cost. SUMMARY

[0005] The purpose of the present application is to provide a variable-diameter cylinder compression device to solve the problems existing in the prior art and to realize the clamping and fixing of multiple-diameter cylinders with good centering.

[0006] To achieve the above purpose, the present application provides the following scheme:

[0007] The present application provides a variable-diameter cylinder compression device, which comprises a box body, a clamping jaw, a disc and a driving mechanism. The top surface of the box body is provided with a plurality of radially extending slides, which are uniformly distributed in the circumferential direction. Each slide is slidably connected with a clamping jaw.

[0008] The claw includes a claw body, a claw base and a transmission mechanism, the bottom surface of the claw body is provided with a mounting groove, the claw body is provided with a plurality of arc-shaped side clamping surfaces with different radii, the claw base is connected to the bottom surface of the claw body and coaxial with the claw body, the middle part of the claw base is provided with a central through hole, and the top surface of the claw base is provided with a plurality of radially extending sliding grooves equal in number to the arc-shaped side clamping surfaces, and each sliding groove is uniformly distributed along the circumferential direction and extends inwardly to communicate with the central through hole.

[0009] The transmission mechanism includes an intermittent pushing gear, a transmission shaft and first and second gears connected to the transmission shaft, the transmission shaft is rotationally connected in the central through hole, the lower end of the transmission shaft is connected to the first gear after passing through the sliding channel, the intermittent pushing gear is rotationally connected in the mounting groove and engaged with the second gear, the intermittent pushing gear is provided with an eccentric pushing rod matched with the sliding groove, and when the intermittent pushing gear rotates to drive the eccentric pushing rod to rotate, the eccentric pushing rod can slide out of one sliding groove and slide into the next sliding groove, thereby intermittently pushing the claw body to rotate by an angle and converting the arc-shaped side clamping surface of the claw body towards the center.

[0010] The disc is rotationally connected in the box and coaxial with the box, the driving mechanism is used for driving the disc to rotate, the disc is provided with a plurality of arc-shaped grooves corresponding to the first gears respectively, each arc-shaped groove is uniformly distributed along the circumferential direction, and the same inner side wall of each arc-shaped groove is provided with an arc-shaped rack, the arc-shaped rack is engaged with the first gear, and when the disc rotates, the transmission shaft rotates at the same time to drive the claw body to move radially along the sliding channel under the action of the arc-shaped rack.

[0011] Preferably, the driving mechanism includes a disc shaft, a worm gear, a worm and a motor, the disc shaft is rotationally connected in the box, the top end of the disc shaft is fixedly connected to the bottom end of the disc, the disc shaft is coaxial with the disc, the worm gear is fixedly connected to the disc shaft, the worm is rotationally connected to the box and in transmission connection with the worm gear, and the motor is connected with the worm and used for driving the worm to rotate.

[0012] Preferably, the bottom end of the box is provided with an end cover, the lower end of the disc shaft is rotationally connected in the end cover through a first bearing, the lower end of the end cover is provided with a bearing cover, a first sleeve is sleeved on the disc shaft, the first sleeve is located between the first bearing and the worm gear, and the first bearing, the first sleeve and the worm gear are pressed on a shaft shoulder through the bearing cover.

[0013] Preferably, the upper end of the transmission shaft is rotatably connected to the claw body through a self-lubricating bearing, a second sleeve is sleeved on the transmission shaft between the self-lubricating bearing and the second gear, a first circular nut is threadedly connected to the top end of the transmission shaft, and the self-lubricating bearing, the second sleeve and the second gear are pressed on the shaft shoulder through the first circular nut.

[0014] Preferably, the lower end of the transmission shaft is rotatably connected to the center through hole through a second bearing, a third sleeve is sleeved on the transmission shaft between the second bearing and the first gear, a second circular nut is threadedly connected to the bottom end of the transmission shaft, and the first gear, the third sleeve and the second bearing are pressed on the shaft shoulder through the second circular nut.

[0015] Preferably, the four slide ways are arranged, and the claw body is provided with four arc-shaped side clamping surfaces with different radii.

[0016] Preferably, a sector plate is fixedly arranged on the bottom surface of the intermittent pushing gear, and the eccentric pushing rod is fixedly connected to the sector plate.

[0017] Preferably, the end cover is connected to the box body through bolts, and the bearing cover is connected to the end cover through bolts.

[0018] The present application has the following technical effects relative to the prior art:

[0019] The present application provides a variable-diameter cylindrical compression device. The disc is driven to rotate by the driving mechanism. The transmission shaft rotates and moves radially along the slide way due to the meshing of the arc-shaped rack and the first gear, so as to change the clamping radius of the clamping jaw. After the transmission shaft rotates, the intermittent pushing gear is driven to rotate by the second gear, so as to drive the eccentric pushing rod to rotate. The eccentric pushing rod slides into and out of a slide way, and the claw base is rotated by an angle. The arc-shaped side clamping surface of the claw body towards the center is converted from an original radius to a changed clamping radius, so as to clamp the cylindrical with the changed radius. The disc is rotated to adjust the clamping radius, and the arc-shaped side clamping surface of the claw body corresponding to the clamping radius is converted to face the center, so as to clamp and fix the cylindrical with different diameters. The clamping jaws are synchronously adjusted, and the centering is good. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort.

[0021] Figure 1The structural schematic view of the variable-diameter cylinder compression device provided by the present application is shown in the figure.

[0022] Figure 2 The exploded view of the variable-diameter cylinder compression device provided by the present application is shown in the figure.

[0023] Figure 3 The structural schematic view of the clamp jaw in the present application is shown in the figure.

[0024] Figure 4 The schematic view of the meshing of the first gear and the arc-shaped rack in the clamp jaw in the present application is shown in the figure.

[0025] Figure 5 The sectional structural schematic view of the clamp jaw in the present application is shown in the figure.

[0026] Figure 6 The schematic view of the connection structure of the jaw seat and the transmission mechanism in the present application is shown in the figure.

[0027] Figure 7 The structural schematic view of the intermittent pushing gear and the second gear in the present application is shown in the figure.

[0028] In the figure: 1 - box, 2 - clamp jaw, 3 - disc, 4 - slide, 5 - jaw body, 6 - jaw seat, 7 - mounting groove, 8 - arc-shaped side clamping surface, 9 - sliding groove, 10 - intermittent pushing gear, 11 - transmission shaft, 12 - first gear, 13 - second gear, 14 - eccentric pushing rod, 15 - arc-shaped groove, 16 - arc-shaped rack, 17 - disc shaft, 18 - worm wheel, 19 - worm, 20 - end cover, 21 - first bearing, 22 - bearing cover, 23 - first sleeve, 24 - self-lubricating bearing, 25 - second sleeve, 26 - first round nut, 27 - second bearing, 28 - third sleeve, 29 - second round nut, 30 - sector. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0030] The present application aims to provide a variable-diameter cylinder compression device to solve the problems existing in the prior art and to achieve the clamping and fixing of cylinders with various diameters and good centering.

[0031] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0032] As Figures 1-7As shown, the embodiment provides a variable diameter cylinder compression device, comprising a box 1, a clamp jaw 2, a disc 3 and a driving mechanism, the top surface of the box 1 is provided with a plurality of radially extending slides 4, each slide 4 is uniformly distributed along the circumferential direction, and each slide 4 is slidingly connected with a clamp jaw 2;

[0033] The clamp jaw 2 comprises a jaw body 5, a jaw base 6 and a transmission mechanism, the bottom surface of the jaw body 5 is provided with a mounting groove 7, the jaw body 5 is provided with a plurality of arc-shaped side clamping surfaces 8 with different radii, the jaw base 6 is connected to the bottom surface of the jaw body 5 and coaxial with the jaw body 5, the central through hole is arranged in the middle of the jaw base 6, and the top surface of the jaw base 6 is provided with a plurality of radially extending sliding grooves 9 equal in number to the arc-shaped side clamping surfaces 8, each sliding groove 9 is uniformly distributed along the circumferential direction and extends inwardly to communicate with the central through hole;

[0034] The transmission mechanism comprises an intermittent push gear 10, a transmission shaft 11, a first gear 12 and a second gear 13 connected to the transmission shaft 11, the transmission shaft 11 is rotatably connected in the central through hole, the lower end of the transmission shaft 11 is connected with the first gear 12 after passing through the slide 4, the intermittent push gear 10 is rotatably connected in the mounting groove 7 and engaged with the second gear 13, the eccentric push rod 14 matched with the sliding groove 9 is arranged on the intermittent push gear 10, when the intermittent push gear 10 rotates to drive the eccentric push rod 14 to rotate, the eccentric push rod 14 can slide out of one sliding groove 9 and slide into the next sliding groove 9, thereby intermittently pushing the jaw body 5 to rotate by an angle and converting the arc-shaped side clamping surface 8 of the jaw body 5 towards the center;

[0035] The disc 3 is rotatably connected in the box 1 and coaxial with the box 1, the driving mechanism is used for driving the disc 3 to rotate, the disc 3 is provided with a plurality of arc-shaped grooves 15 corresponding to each first gear 12 respectively, each arc-shaped groove 15 is uniformly distributed along the circumferential direction, and the same inner side wall of each arc-shaped groove 15 is provided with an arc-shaped rack 16, the arc-shaped rack 16 is engaged with the first gear 12, and when the disc 3 rotates, the transmission shaft 11 rotates at the same time to drive the jaw body 5 to move radially along the slide 4 under the action of the arc-shaped rack 16.

[0036] In use, according to the diameter size of the cylinder to be clamped, the disc 3 is driven to rotate by the driving mechanism, the transmission shaft 11 is simultaneously rotated and radially moved along the slide 4 due to the engagement of the arc-shaped rack 16 and the first gear 12, the clamping radius of the clamping jaw 2 is changed to adapt to the diameter size of the cylinder, after the transmission shaft 11 is rotated, the second gear 13 drives the intermittent push gear 10 to rotate, thereby driving the eccentric push rod 14 to rotate, the eccentric push rod 14 drives the jaw base 6 to rotate by an angle, the arc-shaped side clamping surface 8 of the jaw body 5 is converted to the corresponding radius of the cylinder, thereby realizing the clamping of the cylinder of the size, the disc 3 can be rotated to realize the adjustment of different clamping radii, and the arc-shaped side clamping surface 8 of the jaw body corresponding to the clamping radius is converted to the center, thereby realizing the clamping and fixing of cylinders of various diameters, the clamping jaws 2 are synchronously adjusted, the centering is good, the stability and uniformity of clamping can be ensured, the sample part is prevented from flying in the compression process, and the safety and reliability are higher.

[0037] In the embodiment, the driving mechanism comprises a disc shaft 17, a worm wheel 18, a worm 19 and a motor, the disc shaft 17 is rotationally connected in the box body 1, the top end of the disc shaft 17 is fixedly connected to the bottom end of the disc 3, the disc shaft 17 is coaxial with the disc 3, the worm wheel 18 is fixedly connected to the disc shaft 17, the worm 19 is rotationally connected to the box body 1 and is in transmission connection with the worm wheel 18, and the motor is connected with the worm 19 and is used for driving the worm 19 to rotate. The motor drives the worm 19 to rotate, the rotation of the worm 19 drives the worm wheel 18 to rotate, thereby driving the disc shaft 17 and the disc 3 to rotate, and the adjustment of the clamping jaw 2 is realized.

[0038] In the embodiment, the bottom end of the box body 1 is provided with an end cover 20, the lower end of the disc shaft 17 is rotationally connected in the end cover 20 through a first bearing 21, the lower end of the end cover 20 is provided with a bearing cover 22, a first sleeve 23 is sleeved on the disc shaft 17, the first sleeve 23 is located between the first bearing 21 and the worm wheel 18, and the first bearing 21, the first sleeve 23 and the worm wheel 18 are pressed on the shaft shoulder through the bearing cover 22.

[0039] In the embodiment, the upper end of the transmission shaft 11 is rotationally connected to the jaw body 5 through a self-lubricating bearing 24, a second sleeve 25 is sleeved on the transmission shaft 11 between the self-lubricating bearing 24 and the second gear 13, a first circular nut 26 is threadedly connected to the top end of the transmission shaft 11, and the self-lubricating bearing 24, the second sleeve 25 and the second gear 13 are pressed on the shaft shoulder through the first circular nut 26.

[0040] In the embodiment, the lower end of the transmission shaft 11 is rotationally connected in the center through hole through a second bearing 27, a third sleeve 28 is sleeved on the transmission shaft 11 between the second bearing 27 and the first gear 12, a second circular nut 29 is threadedly connected to the bottom end of the transmission shaft 11, and the first gear 12, the third sleeve 28 and the second bearing 27 are pressed on the shaft shoulder through the second circular nut 29.

[0041] In the embodiment, the slide 4 is provided as four, and the claw body 5 is provided with four arc-shaped side clamping surfaces 8 with different radii. The four clamps 2 on the four slides 4 can clamp the circumference of the cylinder, ensuring the stability and uniformity of clamping. By converting the arc-shaped side clamping surfaces 8 with different radii to face the center, clamping and fixing of four different diameter cylinders can be achieved.

[0042] In the embodiment, the intermittent pushing gear 10 is fixedly provided with a sector plate 30 on the bottom surface, and the eccentric pushing rod 14 is fixedly connected to the sector plate 30.

[0043] In the embodiment, the end cover 20 is connected to the box body 1 through bolts, and the bearing cover 22 is connected to the end cover 20 through bolts, facilitating dismounting and mounting.

[0044] The principles and implementation manners of the present application are described by applying specific examples in the present application. The above embodiment is only used to help understand the method of the present application and its core idea; meanwhile, for the general technical personnel in the field, according to the idea of the present application, the specific implementation manner and application range will be changed. In conclusion, the content of the present application should not be understood as the limitation of the present application.

Claims

1. A variable diameter cylindrical compression device, characterized in that: It includes a housing, grippers, a disc, and a drive mechanism. The top surface of the housing is provided with multiple radially extending slides, each slide being evenly distributed along the circumference, and each slide being slidably connected to a gripper. The gripper includes a gripper body, a gripper base, and a transmission mechanism. The bottom surface of the gripper body is provided with a mounting groove. The gripper body is provided with multiple arc-shaped side gripping surfaces of different radii. The gripper base is connected to the bottom surface of the gripper body and is coaxial with the gripper body. The center of the gripper base is provided with a central through hole. The top surface of the gripper base is provided with radially extending sliding grooves equal in number to the arc-shaped side gripping surfaces. Each of the sliding grooves is evenly distributed along the circumferential direction and extends inward to connect with the central through hole. The transmission mechanism includes an intermittently driven gear, a transmission shaft, and a first gear and a second gear connected to the transmission shaft. The transmission shaft is rotatably connected in the central through hole. The lower end of the transmission shaft passes through the slide rail and connects to the first gear. The intermittently driven gear is rotatably connected in the mounting groove and meshes with the second gear. The intermittently driven gear is provided with an eccentric push rod that cooperates with the slide rail. When the intermittently driven gear rotates and drives the eccentric push rod to rotate, the eccentric push rod can slide out of one slide rail and slide into the next slide rail, thereby intermittently driving the claw body to rotate by an angle and turning the claw body toward the central arc-shaped side clamping surface. The disc is rotatably connected to the housing and coaxial with the housing. The driving mechanism is used to drive the disc to rotate. The disc is provided with a plurality of arc-shaped grooves corresponding to each of the first gears. The arc-shaped grooves are evenly distributed along the circumferential direction. An arc-shaped rack is provided on the same inner sidewall of each arc-shaped groove. The arc-shaped rack meshes with the first gear. When the disc rotates, under the action of the arc-shaped rack, the transmission shaft rotates and drives the claw to move radially along the slide.

2. The variable diameter cylindrical compression device according to claim 1, characterized in that: The driving mechanism includes a disc shaft, a worm gear, a worm, and a motor. The disc shaft is rotatably connected to the housing, and the top end of the disc shaft is fixedly connected to the bottom end of the disc. The disc shaft and the disc are coaxial. The worm gear is fixedly connected to the disc shaft. The worm is rotatably connected to the housing and is driven by the worm gear. The motor is connected to the worm and is used to drive the worm to rotate.

3. The variable diameter cylindrical compression device according to claim 2, characterized in that: The bottom of the housing is provided with an end cover. The lower end of the disc shaft is rotatably connected to the end cover through a first bearing. The lower end of the end cover is provided with a bearing cover. A first sleeve is sleeved on the disc shaft. The first sleeve is located between the first bearing and the worm gear. The bearing cover presses the first bearing, the first sleeve and the worm gear onto the shaft shoulder.

4. The variable diameter cylindrical compression device according to claim 1, characterized in that: The upper end of the drive shaft is rotatably connected to the claw body via a self-lubricating bearing. A second sleeve is fitted on the drive shaft between the self-lubricating bearing and the second gear. A first round nut is threaded to the top end of the drive shaft. The self-lubricating bearing, the second sleeve, and the second gear are pressed onto the shaft shoulder by the first round nut.

5. The variable diameter cylindrical compression device according to claim 1, characterized in that: The lower end of the drive shaft is rotatably connected to the central through hole via a second bearing. A third sleeve is fitted on the drive shaft between the second bearing and the first gear. A second round nut is threaded onto the bottom end of the drive shaft. The first gear, the third sleeve, and the second bearing are pressed onto the shaft shoulder by the second round nut.

6. The variable diameter cylindrical compression device according to claim 1, characterized in that: The slide rails are configured as four, and the claw body has four arc-shaped side clamping surfaces with different radii.

7. The variable diameter cylindrical compression device according to claim 1, characterized in that: The bottom surface of the intermittent drive gear is fixedly provided with a sector-shaped disk, and the eccentric push rod is fixedly connected to the sector-shaped disk.

8. The variable diameter cylindrical compression device according to claim 3, characterized in that: The end cap is bolted to the housing, and the bearing cover is bolted to the end cap.

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