Universal flexible clamping device for valve body

Abstract

The utility model discloses a universal flexible clamping device for a valve body, and belongs to the technical field of valve body clamps. The device comprises a mounting platform; the multiple clamping jaw assemblies are evenly arranged on the mounting face of the mounting platform at intervals in the circumferential direction, each clamping jaw assembly comprises a sliding base, an elastic buffering assembly and a clamping piece, one end of each elastic buffering assembly is connected to the side, close to the center of the mounting platform, of the lower end of the corresponding sliding base, and the clamping pieces are mounted at the other ends of the elastic buffering assemblies; measuring holes are formed in the positions, corresponding to the clamping pieces, of the lower end of the sliding seat; a driving mechanism; a plurality of distance measuring sensors; and a controller. The clamping device can clamp workpieces of different specifications, it can be guaranteed that the clamping piece is attached to the surfaces of the workpieces through the distance measuring sensor, meanwhile, automatic adjustment of the position of the clamping piece is achieved through the elastic clamping assembly, it is guaranteed that the clamping piece is attached to the surfaces of the workpieces, the workpieces are not damaged, and the clamping stability is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of valve body clamps, and more specifically to a universal flexible clamping device for valve bodies. Background Art

[0002] The valve body clamping device is an important tool used to fix and position valve body parts in mechanical manufacturing. It plays a key role in the valve processing, assembly, testing and other processes.

[0003] Different specifications of valve bodies have different weights, different flange diameters, and the valve body's pouring and riser is located around the valve body flange surface. The existing valve body clamping device generally has a small stroke and cannot adapt to the clamping work of different specifications and irregular valve bodies, and it is difficult to ensure the stability of the clamping. In addition, the valve body surface is a casting surface with a rough surface. The existing clamping device adopts rigid clamping and cannot be adjusted. It is difficult to ensure that each clamping claw can be firmly clamped on the valve body surface, thus affecting the processing accuracy of the valve body. Utility Model Content

[0004] In view of this, the utility model aims to provide a universal flexible clamping device for valve bodies to at least to some extent solve the technical problems in the prior art that the clamping devices cannot clamp valve bodies of different specifications and irregular shapes and cannot automatically adjust the clamping force, resulting in the inability to tighten the clamping.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A universal flexible clamping device for a valve body, comprising:

[0007] Installation platform;

[0008] A plurality of clamping jaw assemblies, wherein the plurality of clamping jaw assemblies are evenly spaced and arranged on the mounting surface of the mounting platform in the circumferential direction, each clamping jaw assembly comprises a slide seat, an elastic buffer assembly and a clamping member, wherein the upper ends of the plurality of slide seats are slidably connected to the mounting surface of the mounting platform along the direction from the center of the mounting platform to the circumference thereof; one end of the elastic buffer assembly is connected to a side of the lower end of the slide seat close to the center of the mounting platform, the clamping member is installed at the other end of the elastic buffer assembly, and the clamping surfaces of the plurality of clamping members are arranged opposite to each other, and a measuring hole is provided at the lower end of the slide seat corresponding to the clamping member;

[0009] A driving mechanism, wherein the driving mechanism is mounted on the mounting platform and an output end of the driving mechanism is drivingly connected to a plurality of the slide seats to drive the slide seats to slide;

[0010] A plurality of distance measuring sensors, each of which corresponds to each of the plurality of slides and is fixed at a position at the lower end of the slide corresponding to the measuring hole;

[0011] A controller, the controller being electrically connected to the driving mechanism and the ranging sensor.

[0012] The beneficial effects that the present utility model can achieve: Driven by the driving mechanism, multiple jaw assemblies slide on the mounting platform to approach or move away from each other to clamp or release the valve body, and can adjust to clamp work for valve bodies of different specifications. And when the ranging sensor detects that the clamping member reaches the set position, the controller controls the driving mechanism to stop the sliding of the sliding seat. Each clamping member is automatically fine-tuned under the action of the corresponding elastic buffer assembly to tightly clamp on the surface of the workpiece, so as to adapt to the clamping work of the rough surface of the valve body and prevent the situations of loose clamping or excessive clamping.

[0013] Preferably, it further includes a plurality of slide rails. The plurality of slide rails correspond to the plurality of sliding seats one by one and are in sliding fit. The sliding direction of each slide rail is arranged along the direction from the center of the mounting platform to its peripheral side and is fixed on the mounting surface of the mounting platform. The driving mechanism is installed on the slide rail and its output end is in transmission connection with the sliding seat.

[0014] Preferably, the driving mechanism includes a driving motor, a plurality of transmission lead screws, a plurality of transmission nuts and a plurality of bevel gears. The driving motor is fixed at one end of any one of the slide rails away from the center of the mounting platform; the plurality of transmission lead screws correspond to the plurality of slide rails one by one. Each transmission lead screw is arranged along the sliding direction of the slide rail and is rotatably installed on the slide rail. The transmission lead screw at the position corresponding to the driving motor is in transmission connection with the output end of the driving motor; the plurality of transmission nuts correspond to the plurality of transmission lead screws one by one. Its upper end is in transmission connection with the transmission lead screw, and its lower end is in sliding connection with the slide rail; the sliding seat is fixed at the bottom of the transmission nut; the plurality of bevel gears correspond to the plurality of transmission lead screws one by one and are fixed at one end of the transmission lead screw close to the center of the mounting platform, and adjacent bevel gears are in meshing transmission connection.

[0015] Preferably, a protective cover is installed at the center of the mounting platform. Each bevel gear is placed inside the protective cover. One end of each transmission lead screw close to the center of the mounting platform passes through the side wall of the protective cover and is in transmission connection with the corresponding bevel gear.

[0016] Preferably, each of the slide rails includes a rail body and bearing seats mounted at both ends of the rail body. The rail body is fixed on the mounting surface of the mounting platform. On one side of the rail body away from the mounting platform, an installation groove is formed with a length direction arranged from its center to its circumferential direction and both ends are through. On both side walls of the installation groove, two long strip-shaped sliding grooves are symmetrically formed and both are arranged along its length direction. Sliders that are slidably matched with the two long strip-shaped sliding grooves are respectively fixed on both sides of the lower end of the transmission nut; the two bearing seats are respectively installed on the inner bottom walls at both ends of the installation groove, and both ends of the transmission screw are respectively rotatably connected to the two bearing seats through bearings.

[0017] Preferably, the transmission screw is a ball screw.

[0018] Preferably, the driving motor is a reduction servo motor.

[0019] Preferably, the elastic buffer assembly includes multiple guide rods and multiple springs. Multiple sliding holes arranged along its sliding direction are formed at the lower end of the sliding seat. The multiple guide rods correspond to the multiple sliding holes one by one and one end is slidably connected in the sliding holes. The springs are sleeved on the guide rods and one end abuts against the side wall surface of the sliding seat close to the center of the mounting platform. The clamping member is fixed at the other end of the guide rod and the side away from the clamping surface abuts against the other end of the spring.

[0020] Preferably, the clamping member includes a clamping plate and a support plate. The clamping plate is fixed at the other ends of the multiple guide rods. The support plate is arranged perpendicular to the clamping plate, and one end of it is fixed at the bottom of the clamping plate and the other end extends towards the center of the mounting platform to support the workpiece to be clamped.

[0021] Preferably, the clamping surface of the clamping plate is an arc surface.

[0022] Through the above technical solutions, compared with the prior art, the present utility model discloses a general-purpose flexible clamping device for valve bodies, which is simple in processing and low in cost. It realizes large-stroke clamping through screw drive, improves the clamping range, and adapts to workpieces of different specifications; through the distance measuring sensor, it can ensure that the clamping member fits the surface of the workpiece, and at the same time uses the elastic clamping assembly to realize automatic adjustment of the position of the clamping member, ensuring that the clamping member is closely attached to the surface of the workpiece without damaging the workpiece, and improving the stability of clamping. Description of the Drawings

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the provided drawings.

[0024] Figure 1 The structural schematic diagram of the working state of a general-purpose flexible clamping device for valve bodies provided by the present invention.

[0025] Figure 2 The upward view structural schematic diagram of a general-purpose flexible clamping device for valve bodies provided by the present invention.

[0026] Figure 3 The structural schematic diagram of a general-purpose flexible clamping device for valve bodies provided by the present invention in an inverted state.

[0027] Figure 4 The upward view structural schematic diagram of the slide rail provided by the present invention.

[0028] Figure 5 The side view structural schematic diagram of the slide rail provided by the present invention.

[0029] Figure 6 The three-dimensional structural schematic diagram of the clamping assembly provided by the present invention.

[0030] In the figure: 1, mounting platform; 2, clamping assembly; 21, slide seat; 211, measurement hole; 22, elastic buffer assembly; 221, guide rod; 222, spring; 23, clamping member; 231, clamping plate; 232, support plate; 3, driving mechanism; 31, driving motor; 32, transmission lead screw; 33, transmission nut; 34, bevel gear; 4, distance measuring sensor; 5, slide rail; 51, rail body; 511, mounting groove; 512, long strip-shaped sliding groove; 52, bearing seat; 6, protective cover; 7, valve body. Detailed implementation manners

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0032] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0033] In the present utility model, unless otherwise clearly specified and defined, the terms "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0034] Please refer to Figures 1 - 6 , an embodiment of the present utility model discloses a universal flexible clamping device for a valve body, including:

[0035] An installation platform 1;

[0036] A plurality of jaw assemblies 2, the plurality of jaw assemblies 2 are circumferentially and evenly spaced on the installation surface of the installation platform 1. Each jaw assembly 2 includes a slide base 21, an elastic buffer assembly 22 and a clamping member 23. The upper end of the slide base 21 is slidably connected to the installation surface of the installation platform 1 along the direction from the center of the installation platform 1 to its circumferential side; one end of the elastic buffer assembly 22 is connected to the lower end of the slide base 21 on the side close to the center of the installation platform 1, the clamping member 23 is installed at the other end of the elastic buffer assembly 22, and the clamping surfaces of the plurality of clamping members 23 are arranged oppositely. A measurement hole 211 is opened at the lower end of the slide base 21 corresponding to the clamping member 23;

[0037] A driving mechanism 3, the driving mechanism 3 is installed on the installation platform 1 and its output end is drivingly connected to a plurality of slide bases 21 to drive the slide bases 21 to slide;

[0038] A plurality of distance measuring sensors 4, the plurality of distance measuring sensors 4 correspond to the plurality of slide bases 21 one by one and are fixed at the lower end of the slide base 21 corresponding to the measurement hole 211;

[0039] A controller, the controller is electrically connected to the driving mechanism 3 and the distance measuring sensors 4.

[0040] Driven by the driving mechanism 3, all the jaw assemblies 2 slide on the mounting platform to approach or move away from each other, so as to clamp or release the valve body, and can be adjusted to adapt to the clamping work of valve bodies of different specifications. Each ranging sensor 4 can detect the position of the corresponding clamping member, and when any ranging sensor 4 detects that the clamping member 23 reaches the set position, the controller controls the driving mechanism to stop the sliding of the sliding seat 21. Each clamping member 23 is automatically fine-tuned under the action of the corresponding elastic buffer assembly 22 to firmly clamp it on the surface of the workpiece, so as to adapt to the clamping work of the rough surface of the valve body and prevent the valve body from being damaged due to insufficient clamping or excessive clamping.

[0041] In a specific embodiment, it further includes a plurality of slide rails 5. The plurality of slide rails 5 are in one-to-one correspondence with and slidably matched with the plurality of sliding seats 21. Each slide rail 5 is arranged with its sliding direction along the direction from the center of the mounting platform 1 to its circumferential side and is fixed on the mounting surface of the mounting platform 1. The driving mechanism 3 is mounted on the slide rail 5 and its output end is in transmission connection with the sliding seat 21.

[0042] In a specific embodiment, the driving mechanism 3 includes a driving motor 31, a plurality of transmission lead screws 32, a plurality of transmission nuts 33 and a plurality of bevel gears 34. The driving motor 31 is fixed at one end of any slide rail 5 away from the center of the mounting platform 1; the plurality of transmission lead screws 32 are in one-to-one correspondence with the plurality of slide rails 5. Each transmission lead screw 32 is arranged along the sliding direction of the slide rail 5 and is rotatably mounted on the slide rail 5. The transmission lead screw 32 corresponding to the driving motor 31 is in transmission connection with the output end of the driving motor 31; the plurality of transmission nuts 33 are in one-to-one correspondence with the plurality of transmission lead screws 32. Their upper ends are in transmission connection with the transmission lead screws 32, and their lower ends are slidably connected to the slide rail 5; the sliding seat 21 is fixed at the bottom of the transmission nut 33; the plurality of bevel gears 34 are in one-to-one correspondence with the plurality of transmission lead screws 32 and are fixed at the ends of the transmission lead screws 32 close to the center of the mounting platform 1, and the adjacent bevel gears 34 are in meshing transmission connection. Through the meshing between the bevel gears 34, the synchronous rotation of the four transmission lead screws 32 is realized, so as to realize the synchronous movement of the four clamping assemblies and realize the self-centering work of clamping the workpiece.

[0043] In a specific embodiment, refer to Figure 2 , a protective cover 6 is installed at the center of the mounting platform 1. Each bevel gear 34 is placed inside the protective cover 6. One end of each transmission lead screw 32 close to the center of the mounting platform 1 passes through the side wall of the protective cover 6 and is in transmission connection with the corresponding bevel gear 34. The protective cover 6 plays a role in protecting the bevel gear 34.

[0044] In a specific embodiment, refer to Figures 4 - 5, each slide rail 5 includes a rail body 51 and bearing seats 52 installed at both ends of the rail body 51. The rail body 51 is fixed on the installation surface of the installation platform 1. On the side of the rail body 51 away from the installation platform 1, an installation groove 511 is formed with a length direction arranged from its center to its circumferential direction and both ends are through. On both side walls of the installation groove 511, two long strip-shaped sliding grooves 512 are symmetrically arranged along its length direction. At both lower ends of the transmission nut 33, sliders that are slidably matched with the two long strip-shaped sliding grooves 512 are respectively fixed; the two bearing seats 52 are respectively installed on the inner bottom walls at both ends of the installation groove 511, and both ends of the transmission screw 32 are rotatably connected to the two bearing seats 52 through bearings to ensure the stable rotation of the transmission screw 32.

[0045] In a specific embodiment, the transmission screw 32 is a ball screw.

[0046] In a specific embodiment, the driving motor 31 is a reduction servo motor.

[0047] In a specific embodiment, as Figure 6 shown, the elastic buffer assembly 22 includes multiple guide rods 221 and multiple springs 222. Multiple slide holes are formed at the lower end of the slide seat 21 along its sliding direction. The multiple guide rods 221 correspond to the multiple slide holes one by one and one end is slidably connected in the slide holes. The springs 222 are sleeved on the guide rods 221 and one end abuts against the side wall surface of the slide seat 21 on the side close to the center of the installation platform 1. The clamping member 23 is fixed at the other end of the guide rod 221 and the side away from the clamping surface abuts against the other end of the spring 222.

[0048] In a specific embodiment, the clamping member 23 includes a clamping plate 231 and a support plate 232. The clamping plate 231 is fixed at the other end of the multiple guide rods 221. The support plate 232 is arranged perpendicular to the clamping plate 231, and one end of it is fixed at the bottom of the clamping plate 231 and the other end extends towards the center of the installation platform 1 to support the workpiece to be clamped. The clamping plate 231 contacts the side wall of the valve body flange, and the support plate 232 supports on the bottom end face of the flange to improve the stability of the valve body clamping.

[0049] In a specific embodiment, the clamping surface of the clamping plate 231 is an arc surface to ensure the firmness of clamping on the valve body surface. In some other embodiments, when clamping other workpieces, according to the surface shape of the workpiece to be clamped, the shape of the clamping surface can be adaptively changed.

[0050] Working principle:

[0051] Before each grasping using this clamping device, the product specifications need to be input in advance. When grasping, start the driving motor 31, and drive the clamping component to slide along the slide rail through the transmission lead screw 32 and the transmission nut 33 for clamping. During the clamping process of the clamping component, the clamping piece 23 first contacts the valve body flange, and then continues to move the compression spring to a preset position. Subsequently, the threshold trigger signal of the corresponding distance measuring sensor 4 is transmitted to the controller to control the driving motor 31 to stop rotating, and the clamping component stops moving. Each clamping piece 23 automatically fits tightly with the valve body flange under the action of the spring 222 to complete the clamping.

[0052] The various embodiments in this specification are described in a progressive manner. The key point of each embodiment is to illustrate the differences from other embodiments. The same or similar parts among the embodiments can be referred to each other. For the device disclosed in the embodiments, since it corresponds to the method disclosed in the embodiments, the description is relatively simple. For the relevant parts, please refer to the description in the method section.

[0053] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A general-purpose flexible clamping device for valve bodies, characterized in that, Including: An installation platform (1); A plurality of jaw components (2), the plurality of jaw components (2) are circumferentially and evenly spaced on the installation surface of the installation platform (1). Each jaw component (2) includes a sliding seat (21), an elastic buffer component (22) and a clamping member (23). The upper ends of the plurality of sliding seats (21) are slidably connected to the installation surface of the installation platform (1) along the direction from the center of the installation platform (1) to its circumferential side; one end of the elastic buffer component (22) is connected to the lower end of the sliding seat (21) on the side close to the center of the installation platform (1), the clamping member (23) is installed at the other end of the elastic buffer component (22), and the clamping surfaces of the plurality of clamping members (23) are arranged oppositely. A measurement hole (211) is provided at the lower end of the sliding seat (21) corresponding to the clamping member (23); A driving mechanism (3), the driving mechanism (3) is installed on the installation platform (1) and its output end is in transmission connection with the plurality of sliding seats (21) to drive the sliding seats (21) to slide; A plurality of distance measuring sensors (4), the plurality of distance measuring sensors (4) correspond to the plurality of sliding seats (21) one by one and are fixed at the lower end of the sliding seat (21) corresponding to the measurement hole (211); A controller, the controller is electrically connected to the driving mechanism (3) and the distance measuring sensors (4).

2. The general-purpose flexible clamping device for valve bodies according to claim 1, wherein, It further includes a plurality of slide rails (5), the plurality of slide rails (5) correspond to the plurality of sliding seats (21) one by one and are in sliding fit. The sliding direction of each slide rail (5) is arranged along the direction from the center of the installation platform (1) to its circumferential side and is fixed on the installation surface of the installation platform (1). The driving mechanism (3) is installed on the slide rail (5) and its output end is in transmission connection with the sliding seat (21).

3. A general-purpose flexible clamping device for a valve body according to claim 2, characterized in that, The driving mechanism (3) includes a driving motor (31), a plurality of transmission lead screws (32), a plurality of transmission nuts (33) and a plurality of bevel gears (34). The driving motor (31) is fixed at one end of any one of the slide rails (5) away from the center of the installation platform (1); the plurality of transmission lead screws (32) correspond to the plurality of slide rails (5) one by one. Each transmission lead screw (32) is arranged along the sliding direction of the slide rail (5) and is rotatably installed on the slide rail (5). The transmission lead screw (32) corresponding to the driving motor (31) is in transmission connection with the output end of the driving motor (31); the plurality of transmission nuts (33) correspond to the plurality of transmission lead screws (32) one by one. Its upper end is in transmission connection with the transmission lead screw (32), and its lower end is slidably connected to the slide rail (5); the sliding seat (21) is fixed at the bottom of the transmission nut (33); the plurality of bevel gears (34) correspond to the plurality of transmission lead screws (32) one by one and are fixed at the end of the transmission lead screw (32) close to the center of the installation platform (1), and the adjacent bevel gears (34) are in meshing transmission connection.

4. A general-purpose flexible clamping device for a valve body according to claim 3, characterized in that, A protective cover (6) is installed at the center of the installation platform (1). Each bevel gear (34) is placed inside the protective cover (6). One end of each transmission lead screw (32) close to the center of the installation platform (1) passes through the side wall of the protective cover (6) and is in transmission connection with the corresponding bevel gear (34).

5. A general-purpose flexible clamping device for a valve body according to claim 3, characterized in that Each slide rail (5) includes a rail body (51) and bearing seats (52) installed at both ends of the rail body (51). The rail body (51) is fixed on the installation surface of the installation platform (1). An installation groove (511) with a length direction arranged from its center to its circumferential side and both ends being through is formed on the side of the rail body (51) away from the installation platform (1). Two long strip-shaped sliding grooves (512) both arranged along its length direction are symmetrically formed on both side walls of the installation groove (511). Sliders that are slidably matched with the two long strip-shaped sliding grooves (512) are respectively fixed on both sides of the lower end of the transmission nut (33). The two bearing seats (52) are respectively installed on the inner bottom walls at both ends of the installation groove (511). Both ends of the transmission lead screw (32) are rotatably connected to the two bearing seats (52) through bearings.

6. A general-purpose flexible clamping device for a valve body according to claim 3, characterized in that, The transmission lead screw (32) is a ball screw.

7. A general-purpose flexible clamping device for a valve body according to claim 3, characterized in that, The driving motor (31) is a reduction servo motor.

8. A general-purpose flexible clamping device for a valve body according to claim 1, characterized in that, The elastic buffer assembly (22) includes multiple guide rods (221) and multiple springs (222). Multiple sliding holes arranged along its sliding direction are formed at the lower end of the sliding seat (21). The multiple guide rods (221) correspond to the multiple sliding holes one by one and one end of each guide rod is slidably connected in the sliding hole. The spring (222) is sleeved on the guide rod (221) and one end of the spring abuts against the side wall surface of the sliding seat (21) on the side close to the center of the installation platform (1). The clamping member (23) is fixed at the other end of the guide rod (221) and the side of the clamping member away from the clamping surface abuts against the other end of the spring (222).

9. A general-purpose flexible clamping device for valve bodies according to claim 8, characterized in that, The clamping member (23) includes a clamping plate (231) and a support plate (232). The clamping plate (231) is fixed at the other ends of the multiple guide rods (221). The support plate (232) is arranged perpendicular to the clamping plate (231), and one end of the support plate is fixed at the bottom of the clamping plate (231), and the other end extends towards the direction close to the center of the installation platform (1) to support the workpiece to be clamped.

10. The general-purpose flexible clamping device for valve body according to claim 9, characterized in that, The clamping surface of the clamping plate (231) is an arc surface.

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