Clamping device for universal testing machine

Abstract

The clamping device for the universal testing machine comprises a shell, a clamping mechanism, a first driving mechanism and a second driving mechanism, the second driving mechanism is arranged in the shell and connected with the clamping mechanism, the clamping mechanism is located at the top of the shell, the first driving mechanism penetrates through the side face of the shell and is movably connected with the second driving mechanism, and the second driving mechanism is movably connected with the clamping mechanism. The first driving mechanism is used for driving the second driving mechanism to rotate; the clamping mechanism comprises a fixing disc, a positioning ring and a clamping assembly, the fixing disc is installed on the upper surface of the shell, and the upper surface of the fixing disc protrudes to form the positioning ring; the second driving mechanism comprises a rotating column, a second bevel gear, a positioning mechanism and an extrusion assembly, and the rotating column is located in the shell and connected with the center of the fixing disc through the positioning mechanism. The clamping device for the universal testing machine can clamp a thin-walled tube more conveniently, and is simple in structure and convenient to operate.

Description

TECHNICAL FIELD

[0001] The utility model relates to clamping device, concretely relates to a kind of clamping device for universal testing machine. BACKGROUND

[0002] In universal testing machine, need to test thin-walled pipe, need to be positioned and clamped thin-walled pipe when testing, thus need clamping device for universal testing machine.

[0003] Chinese patent discloses a kind of application No. CN202120765421.9 clamping device of universal testing machine, the clamping device of the universal testing machine, including the fixed seat that can be detached and installed on test machine workbench, the fixed seat is rotationally connected with threaded rod and adjusting lever, the adjacent end of adjusting lever and threaded rod is all connected with the bevel gear of intermeshing connection, the inner locking block with one end and fixed seat sliding connection is threadedly connected on the threaded rod, the fixed seat is provided with several inner push block on the circumference along threaded rod axis center, and the inner push block is slidingly connected with inner locking block and along threaded rod section radial sliding.

[0004] Although the clamping device of the universal testing machine can be rotated by driving threaded rod, inner locking block is slid in vertical direction, inner locking block pushes inner push block to expand outward and moves, so that positioning and clamping thin-walled pipe are realized, but the clamping device of the universal testing machine still has the following disadvantages: when rotating threaded rod, it needs to rotate threaded rod for many circles, so that operation is troublesome, and operation efficiency is reduced. UTILITY MODEL CONTENTS

[0005] The utility model provides a kind of clamping device for universal testing machine, solve the problem that when rotating threaded rod of prior art, it needs to rotate threaded rod for many circles and lead to operation is troublesome.

[0006] To achieve the above object, the utility model adopts the following technical scheme: clamping device for universal testing machine, comprising: shell, clamping mechanism, first drive mechanism and second drive mechanism,

[0007] Second drive mechanism is connected in shell, and clamping mechanism is positioned at the top of shell, and first drive mechanism is movably connected with second drive mechanism by passing through the side surface of shell, and first drive mechanism is used to drive second drive mechanism to rotate;

[0008] Clamping mechanism includes: fixed disc, positioning ring and clamping assembly, fixed disc is installed on the upper surface of shell, positioning ring is formed on the upper surface of fixed disc, positioning ring is used to surround the outer thin-walled pipe, fixed disc is provided with clamping hole, clamping assembly is clamped into clamping hole, and clamping assembly can slide in radial direction relative to fixed disc along clamping hole;

[0009] The second driving mechanism comprises a rotating column, a second bevel gear, a positioning mechanism and a pressing assembly. The rotating column is located in the shell. The rotating column is connected with the center of the fixed disc through the positioning mechanism. The rotating column can rotate relative to the fixed disc. The second bevel gear is arranged around the lower end of the rotating column. The upper end of the rotating column is provided with the pressing assembly. The pressing assembly is used for pushing the clamping assembly to slide away from the center of the fixed disc. The positioning mechanism guides the rotation of the rotating column. The positioning mechanism prevents the rotating column from being separated from the fixed disc.

[0010] The first driving mechanism comprises a rotating rod, a first bevel gear, a rotation limiting mechanism and a fixed seat. The fixed seat is installed on one side of the shell. The rotating rod penetrates through the fixed seat and extends into the shell. The first bevel gear is arranged at the end of the rotating rod located in the shell. The first bevel gear is engaged with the second bevel gear. The rotation limiting mechanism is arranged at the connection position of the rotating rod and the shell. The rotation limiting mechanism is used for limiting the rotation of the rotating rod.

[0011] Preferably, the clamping assembly comprises a clamping block and a pressing rod. The clamping block is located above the clamping hole. The clamping block is connected with the pressing rod below. The pressing rod penetrates through the clamping hole and extends into the shell.

[0012] Preferably, there are at least three clamping holes. Each clamping hole is provided with a clamping mechanism.

[0013] Preferably, the pressing assembly comprises a pressing block. The pressing block is fixedly connected with the rotating column. Each pressing rod is provided with a pressing block. The pressing block is in an arc shape. The pressing block close to the pressing rod is a pressing surface. The pressing surface is used for pushing the pressing rod to slide.

[0014] Preferably, the positioning mechanism comprises a supporting ring and a limiting block. The supporting ring is penetrated through by the rotating column. The supporting ring is located below the pressing block. The supporting ring is provided with the limiting block at the top. The limiting block is fixedly connected with the fixed disc.

[0015] Preferably, the rotation limiting mechanism comprises a square cylinder, a tooth ring and a positioning tooth. The shell is provided with a square hole penetrated through by the square cylinder. The square cylinder and the tooth ring are arranged around the rotating rod. The square cylinder is fixedly connected with the tooth ring on the side close to the first bevel gear. The positioning tooth is fixed on the rotating rod. The positioning tooth can be engaged with the tooth ring.

[0016] Preferably, the square cylinder is provided with a push plate on the side close to the fixed seat. The push plate and the fixed seat are connected through a spring. The spring is used for keeping the positioning tooth engaged with the tooth ring.

[0017] Preferably, the rotating rod is provided with a rotation assisting nut on the end close to the fixed seat.

[0018] Preferably, the top surface of the clamping block on the side away from the center of the fixed disc is an arc surface.

[0019] Compared with the prior art, the utility model has the advantages that the clamping device for universal testing machine is equipped with a second driving mechanism and a clamping mechanism in the shell, and a first driving mechanism is further arranged on one side of the shell, the second driving mechanism is driven to rotate through the rotation of the first driving mechanism, the extrusion assembly on the second driving mechanism extrudes the extrusion rod in the clamping assembly through the extrusion surface, the clamping extrusion rod and the clamping block are close to the positioning ring to clamp the thin-walled pipe, the positioning mechanism in the first driving mechanism extrudes the push plate through the spring when the clamping block and the positioning ring clamp the thin-walled pipe, the positioning teeth on one side of the square cylinder are engaged with the tooth ring, the rotation of the first driving mechanism is limited, the clamping block and the positioning ring clamp the thin-walled pipe, and the subsequent processing of the thin-walled pipe is facilitated, the clamping device for universal testing machine can clamp the thin-walled pipe more conveniently, and the device is simple in structure and convenient to operate.

[0020] Other advantages, objects and features of the utility model will be embodied partly through the following description, and will be understood by those skilled in the art through research and practice of the utility model. BRIEF DESCRIPTION OF DRAWINGS

[0021] Fig. 1 It is a schematic view of the clamping device for universal testing machine.

[0022] Fig. 2 It is a perspective view of the clamping device for universal testing machine.

[0023] The drawing comprises a shell 1, a clamping mechanism 2, a fixed disc 21, a positioning ring 22, a clamping assembly 23, a clamping block 231, an extrusion rod 232, a clamping hole 24, a first driving mechanism 3, a rotating rod 31, a first bevel gear 32, a rotation limiting mechanism 33, a square cylinder 331, a tooth ring 332, positioning teeth 333, a fixed seat 34, a spring 35, a rotation assisting nut 36, a second driving mechanism 4, a rotating column 41, a second bevel gear 42, a positioning mechanism 43, a supporting ring 431, a limiting block 432, an extrusion assembly 44, an extrusion block 441 and an extrusion surface 442. DETAILED DESCRIPTION

[0024] In order to make the technical means, creative features, purposes and effects of the utility model more clear and easy to understand, the utility model is further described below in combination with the drawings and specific embodiments:

[0025] For example, Figs. 1-2The utility model provides a kind of clamping device for universal testing machine, it include: shell 1, clamping mechanism 2, first drive mechanism 3 and second drive mechanism 4, shell 1 is equipped with second drive mechanism 4, second drive mechanism 4 connects clamping mechanism 2, clamping mechanism 2 position shell 1 top, first drive mechanism 3 passes through shell 1 side and second drive mechanism 4 movably connected, first drive mechanism 3 is used to drive second drive mechanism 4 rotation;Clamping mechanism 2 includes: fixed disc 21, locating ring 22 and clamping assembly 23, fixed disc 21 is installed on shell 1 upper surface, fixed disc 21 upper surface is projected and is formed with locating ring 22, locating ring 22 is used to surround in thin-walled pipe, fixed disc 21 is opened with clamping hole 24, clamping assembly 23 is inserted into clamping hole 24, clamping assembly 23 can be slid in radial direction with respect to fixed disc 21 in clamping hole 24;Second drive mechanism 4 includes: rotating column 41, second bevel gear 42, positioning mechanism 43 and extrusion assembly 44, rotating column 41 is located in shell 1, rotating column 41 is connected with the center of fixed disc 21 by positioning mechanism 43, rotating column 41 can rotate relative to fixed disc 21, second bevel gear 42 surrounds rotating column 41 lower end, rotating column 41 upper end is equipped with extrusion assembly 44, extrusion assembly 44 is used to push clamping assembly 23 to slide away from the center direction of fixed disc 21, positioning mechanism 43 guides rotating column 41 rotation, positioning mechanism 43 prevents rotating column 41 and fixed disc 21 from disengaging;First drive mechanism 3 includes: rotating rod 31, first bevel gear 32, rotation limiting mechanism 33 and fixed seat 34, fixed seat 34 is installed on one side of shell 1, rotating rod 31 passes through fixed seat 34 and extends into shell 1, rotating rod 31 is equipped with first bevel gear 32 in one end in shell 1, first bevel gear 32 is engaged with second bevel gear 42, rotating rod 31 is equipped with rotation limiting mechanism 33, and rotation limiting mechanism 33 is located at the connecting place of rotating rod 31 and shell 1, and rotation limiting mechanism 33 is used to limit the rotation of rotating rod 31.Use, place thin-walled pipe into locating ring 22, rotate second bevel gear 42 in second drive mechanism 4 by first bevel gear 32 in first drive mechanism 3, extrusion assembly 44 above rotating column 41 rotates extrusion clamping assembly 23, so that clamping assembly 23 slides in the direction of clamping hole 24 to locating ring 22, and clamping assembly 23 and locating ring 22 cooperate to complete clamping of thin-walled pipe.

[0026] Clamping assembly 23 includes: clamping block 231 and extrusion rod 232, clamping block 231 is located above clamping hole 24, extrusion rod 232 is connected below clamping block 231, and extrusion rod 232 extends into shell 1 through clamping hole 24.Extrusion rod 232 is used to be extruded by extrusion assembly 44, so that extrusion rod 232 slides outward along clamping hole 24.

[0027] Clamping hole 24 is equipped with at least three, and one clamping mechanism 2 is arranged in each clamping hole 24.Clamping mechanism 2 is evenly distributed around the vertical axis of fixed disc 21.

[0028] The extrusion assembly 44 comprises extrusion blocks 441 fixedly connected with the rotating column 41, one extrusion block 441 being arranged beside each extrusion rod 232, each extrusion block 441 being of arc structure, and each extrusion block 441 having an extrusion surface 442 close to the extrusion rod 232, the extrusion surface 442 being used to push the extrusion rod 232 to slide. When the extrusion block 441 rotates towards the extrusion rod 232, the extrusion surface 442 of the extrusion block 441 generates pressure on the extrusion rod 232, and the extrusion surface 442 pushes the extrusion rod 232 to slide towards the positioning ring 22 through the arc structure.

[0029] The positioning mechanism 43 comprises a support ring 431 and a limiting block 432, the support ring 431 being arranged for the rotating column 41 to pass through, the support ring 431 being arranged below the extrusion block 441, the support ring 431 having the limiting block 432 arranged on the top of the support ring 431, and the limiting block 432 being fixedly connected with the fixed disc 21. The limiting block 432 is connected with the bottom surface of the fixed disc 21, the support ring 431 supports the bottom of the limiting block 432, and the limiting block 432 blocks the rotation of the extrusion block 441 away from the extrusion rod 232.

[0030] The limiting rotation mechanism 33 comprises a square cylinder 331, a tooth ring 332 and positioning teeth 333, the square cylinder 331 being arranged for the rotating rod 31 to pass through through a square hole arranged on the side of the shell 1, the square cylinder 331 and the tooth ring 332 being arranged around the rotating rod 31, the square cylinder 331 being fixedly connected with the tooth ring 332 on the side close to the first bevel gear 32, and the positioning teeth 333 being fixedly arranged on the rotating rod 31 and capable of being engaged with the tooth ring 332. In use, the first driving mechanism 3 is rotated to make the clamping mechanism 2 clamp the thin-walled pipe, after clamping is completed, the square cylinder 331 is pushed to move towards the second driving mechanism 4 to make the tooth ring 332 engage with the positioning teeth 333, the square cylinder 331 is clamped into the side wall of the shell 1 to prevent the square cylinder 331 from rotating, and the tooth ring 332 limits the rotation of the positioning teeth 333.

[0031] The square cylinder 331 is arranged with a push plate on the side close to the fixed seat 34, the push plate is connected with the fixed seat 34 through a spring 35, and the spring 35 is used to keep the positioning teeth 333 engaged with the tooth ring 332. When the tooth ring 332 engages with the positioning teeth 333, the spring 35 keeps the tooth ring 332 engaged with the positioning teeth 333 through the elastic force to keep the clamping mechanism 2 clamping the thin-walled pipe.

[0032] The rotating rod 31 is arranged with a rotating nut 36 on the end close to the fixed seat 34. When the first driving mechanism 3 needs to be rotated, the rotating nut 36 is manually held to rotate the rotating rod 31 to make the first bevel gear 32 drive the second bevel gear 42 to rotate.

[0033] The top surface of the clamping block 231 is arranged with an arc surface on the side away from the center of the fixed disc 21. The arc surface is used to facilitate the thin-walled pipe to be clamped into the clamping block 231.

[0034] Finally, it is explained that the above embodiments are only used to illustrate the technical solutions of the present application and are not limited. Although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present application can be modified or replaced by equivalents without departing from the purpose and scope of the present application. The technical solutions of the present application should be covered in the scope of the claims of the present application.

Claims

1. Clamping device for a universal testing machine, characterized in that The utility model relates to a thin-walled pipe clamping device, including: The shell (1) is equipped with the second drive mechanism (4) in, the second drive mechanism (4) is connected clamping mechanism (2), clamping mechanism (2) position shell (1) top, first drive mechanism (3) passes through shell (1) side and second drive mechanism (4) swing joint, first drive mechanism (3) is used to drive second drive mechanism (4) rotation; Clamping mechanism (2) includes: fixed disc (21), positioning ring (22) and clamping assembly (23), fixed disc (21) installs on shell (1) upper surface, fixed disc (21) upper surface protrudes and is formed with positioning ring (22), positioning ring (22) is used to surround in thin-walled pipe, fixed disc (21) is opened and is clamped into the hole (24), clamping assembly (23) is inserted into the hole (24), and clamping assembly (23) can slide in the radial direction of fixed disc (21) along the hole (24); Second drive mechanism (4) includes: rotating column (41), second bevel gear (42), positioning mechanism (43) and extrusion assembly (44), rotating column (41) is located in shell (1), rotating column (41) is connected with the center of fixed disc (21) through positioning mechanism (43), rotating column (41) can rotate relative to fixed disc (21), second bevel gear (42) surrounds the lower end of rotating column (41), and the upper end of rotating column (41) is equipped with extrusion assembly (44), and extrusion assembly (44) is used to push clamping assembly (23) to slide away from the center direction of fixed disc (21), positioning mechanism (43) guides rotating column (41) rotation, and positioning mechanism (43) prevents rotating column (41) from separating from fixed disc (21); First drive mechanism (3) includes: rotating rod (31), first bevel gear (32), rotation limiting mechanism (33) and fixed seat (34), fixed seat (34) is installed on one side of shell (1), rotating rod (31) passes through fixed seat (34) and extends into shell (1), and the end of rotating rod (31) in shell (1) is equipped with first bevel gear (32), first bevel gear (32) is engaged with second bevel gear (42), and rotating rod (31) is equipped with rotation limiting mechanism (33), and rotation limiting mechanism (33) is located at the connecting place of rotating rod (31) and shell (1), and rotation limiting mechanism (33) is used to limit the rotation of rotating rod (31). Clamping assembly (23) includes: clamping block (231) and extrusion rod (232), clamping block (231) is located above the hole (24), and extrusion rod (232) is connected below clamping block (231), and extrusion rod (232) passes through the hole (24) and extends into shell (1).

2. The gripping device for a universal testing machine according to claim 1, characterized in that There are at least three clamping holes (24), and each clamping hole (24) is equipped with a clamping mechanism (2).

3. The gripping device for a universal testing machine according to claim 2, characterized in that ​ 4. The gripping device for a universal testing machine according to claim 3, characterized in that The extrusion assembly (44) comprises extrusion blocks (441), the extrusion blocks (441) are fixedly connected with the rotating column (41), one extrusion block (441) is arranged beside each extrusion rod (232), the extrusion block (441) is of arc-shaped structure, the extrusion block (441) is provided with an extrusion surface (442) close to the extrusion rod (232), and the extrusion surface (442) is used for pushing the extrusion rod (232) to slide.

5. The gripping device for a universal testing machine according to claim 4, characterized in that The positioning mechanism (43) comprises a supporting ring (431) and a limiting block (432), the supporting ring (431) is penetrated through by the rotating column (41), the supporting ring (431) is located below the extrusion block (441), the limiting block (432) is arranged at the top of the supporting ring (431), and the limiting block (432) is fixedly connected with the fixed disc (21).

6. The gripping device for a universal testing machine according to claim 5, characterized in that The limiting rotation mechanism (33) comprises a square cylinder (331), a tooth ring (332) and a positioning tooth (333), a square hole is formed in the side surface of the shell (1) and penetrates through the square cylinder (331), the square cylinder (331) and the tooth ring (332) are both annularly arranged outside the rotating rod (31), the square cylinder (331) is fixedly connected with the tooth ring (332) on the side close to the first bevel gear (32), the positioning tooth (333) is fixed on the rotating rod (31), and the positioning tooth (333) can be engaged with the tooth ring (332).

7. The gripping device for a universal testing machine according to claim 6, characterized in that The square cylinder (331) is provided with a push plate on the side close to the fixed base (34), the push plate and the fixed base (34) are connected through a spring (35), and the spring (35) is used for keeping the positioning tooth (333) engaged with the tooth ring (332).

8. The gripping device for a universal testing machine according to claim 7, characterized in that The rotating rod (31) is provided with a rotating nut (36) on the end close to the fixed base (34).

9. The gripping device for a universal testing machine according to claim 8, characterized in that The top surface of the clamping block (231) is an arc-shaped surface away from the center of the fixed disc (21).

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