Multi-station multi-point synchronous clamping jig of sleeve rod bearing structure

Abstract

The utility model provides a kind of multi-station multi-point synchronous clamping fixture of sleeve rod bearing structure, including installation bearing and the circumferential setting of several multi-point synchronous clamping modules in the outer edge of installation bearing, the multi-point synchronous clamping module includes support trunk, the point clamping component of setting in the outer end portion of support trunk and the outer extension support component of setting in the outer end portion of support trunk, the inside of the clamping end of the point clamping component is equipped with self-adapting antiskid mechanism, the outer extension support component includes product inside support long piece, and the support surface of product inside support long piece is equipped with centrifugal guide mechanism. The utility model relates to the technical field of multi-station multi-point synchronous clamping.

Description

Technical Field

[0001] This utility model relates to the technical field of multi-station multi-point synchronous clamping, and in particular to a multi-station multi-point synchronous clamping fixture with a sleeve bearing structure. Background Technology

[0002] In the surface treatment and cleaning processes of manufacturing, multi-station rotary clamping fixtures are widely used to hold workpieces and ensure uniform rotation during processes such as spraying, washing, and spin-drying. These fixtures are typically based on a sleeve-bearing structure design, using circumferentially distributed clamping modules to simultaneously fix multiple workpieces and drive them to rotate around an axis, aiming to ensure that all surfaces of the workpieces are treated uniformly, thereby improving work efficiency and processing results.

[0003] However, existing clamping fixtures of this type exhibit significant limitations in practical applications, especially under harsh conditions involving liquid spraying and high-speed rotational drying: Firstly, the friction of traditional rigid clamping surfaces decreases significantly when in contact with the workpiece surface lubricated by the sprayed liquid, easily causing the workpiece to slip or even fall off in the fixture, resulting in insufficient clamping reliability; secondly, and more problematicly, irregular liquid turbulence easily forms between the fixture support and the inner wall of the workpiece during rotation, and liquid accumulates in specific areas inside the workpiece due to centrifugal force. This not only hinders efficient liquid discharge, leading to uneven drying and affecting the next process, but may also cause secondary pollution or corrosion due to liquid residue, ultimately restricting further improvement in product processing quality.

[0004] Therefore, the inventors urgently need a multi-station, multi-point synchronous clamping fixture with a sleeve bearing structure to solve the above problems. Utility Model Content

[0005] To address the shortcomings of the existing technology, this utility model provides a multi-station, multi-point synchronous clamping fixture with a sleeve bearing structure. It aims to solve the technical problems of unstable clamping caused by the slippery surface of the workpiece and uneven drying and poor treatment effect caused by internal liquid turbulence and accumulation in the existing rotary clamping fixture under spraying and spin-drying conditions.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is: a multi-station, multi-point synchronous clamping fixture with a sleeve bearing structure, including a mounting bearing and several multi-point synchronous clamping modules circumferentially arranged on the outer edge of the mounting bearing. The multi-point synchronous clamping module includes a support main body, a point clamping assembly arranged at the outer end of the support main body, and an extended support assembly arranged at the outer end of the support main body. The inner side of the clamping end of the point clamping assembly is provided with an adaptive anti-slip mechanism. The extended support assembly includes an inner support plate of the product, and a centrifugal guiding mechanism is provided on the support surface of the inner support plate of the product.

[0007] Based on the above, the beneficial effect of a multi-station, multi-point synchronous clamping fixture with a sleeve bearing structure is to solve the technical problems of unstable clamping due to the slippery surface of the workpiece and uneven drying and poor treatment effect caused by internal liquid turbulence and accumulation in the existing rotary clamping fixtures under spraying and spin-drying conditions; mainly reflected in: 1. This utility model provides a dynamic and adaptive anti-slip mechanism on the inner side of the clamping end of the point clamping assembly. When clamping a workpiece lubricated by spray liquid, it can provide dynamic and adaptive clamping force and increased friction force, thereby preventing the workpiece from slipping under the rotating spraying condition and ensuring the stability and reliability of clamping. 2. This utility model provides stable radial support for the product by having a long support plate on the inner side of the product closely adhere to the inner side of the product when the fixture rotates. This helps to resist product deformation that may be caused by clamping force and centrifugal force, and forms the basic structure for internal flow guidance. 3. This utility model utilizes a centrifugal guiding mechanism set on the support surface of the long support plate inside the product. When the fixture rotates, it can respond to the centrifugal force and fluid impact to generate a compound motion, thereby breaking the liquid turbulence between the inside of the product and the support surface, guiding the liquid into the guiding channel in an orderly manner and quickly discharging it, thus eliminating local liquid accumulation and ensuring the uniformity and treatment effect of spin drying.

[0008] Furthermore, the adaptive anti-slip mechanism includes a mounting groove opened inside the clamping end of the point clamping assembly, a preload spring disposed in the mounting groove, and a floating anti-slip block connected by the preload spring, wherein the clamping surface of the floating anti-slip block is provided with an anti-slip structure.

[0009] Based on the above, the beneficial effects of the mounting groove are that it positions, installs, and guides the movement of the preload spring and the floating anti-slip block, limiting their stroke and ensuring the stable realization of the adaptive anti-slip function; the beneficial effect of the preload spring is that it provides a continuous outward preload pressure for the floating anti-slip block, realizing the generation of adaptive elastic clamping force when clamping the workpiece, which can not only compensate for minor deviations in workpiece size, but also maintain the persistence and stability of clamping force under vibration conditions; the beneficial effect of the floating anti-slip block is that it transforms the concentrated clamping force into a more evenly distributed contact stress, avoiding excessive local pressure that could damage the workpiece surface, while also providing a mounting foundation for the anti-slip structure; the beneficial effect of the anti-slip structure is that it can still provide sufficient friction even when the workpiece surface is lubricated by sprayed liquid, effectively preventing the workpiece from slipping or circumferentially shifting during the rotation of the fixture.

[0010] Furthermore, the point clamping assembly includes two symmetrically arranged point spring clamps, each point spring clamp comprising a main straight rod and a bending pressure rod, and the adaptive anti-slip mechanism is provided on the inner side of the clamping end of both the main straight rod and the bending pressure rod.

[0011] Based on the above, the beneficial effects of the symmetrically arranged two-point spring clamps are that they apply clamping force to the workpiece simultaneously from two opposite directions, achieving self-balancing and cancellation of clamping force, avoiding workpiece skewing or displacement that may be caused by unilateral clamping, and ensuring the positioning accuracy and stability of the workpiece in the fixture; the beneficial effects of the main straight rod and the bent pressure rod are that they form a lever mechanism through the hinge point, which amplifies the operator's small pressing force into a larger opening force at the clamping end when force is applied to the pressing part, thereby achieving workpiece opening and clamping in a labor-saving manner; the beneficial effects of the adaptive anti-slip mechanism are that it provides dynamic anti-slip and elastic compensation, forming multiple anti-slip guarantees, further enhancing the overall clamping reliability under complex working conditions.

[0012] Furthermore, the anti-slip structure on the floating anti-slip blocks of the two point spring clips consists of interlocking toothed surfaces that cooperate with each other.

[0013] Based on the above, the beneficial effect of the interlocking toothed surfaces is that when clamping the workpiece, the teeth on the two floating anti-blocking blocks can bite the workpiece surface from different directions, which significantly increases the static friction force on the contact surface with the workpiece and forms a mechanical interlocking effect, effectively preventing the workpiece from circumferentially sliding and axially moving during rotation.

[0014] Furthermore, the centrifugal guiding mechanism consists of several floating guide plates arranged along the length of the inner support plate of the product. Several grooves are evenly arranged on the support surface of the inner support plate of the product. A guiding channel is provided at the bottom of the groove. The middle part of the floating guide plate is rotatably connected to the groove via a rotating shaft. The rotating shaft and the shaft hole on the groove are in clearance fit, so that the floating guide plate can rotate around the rotating shaft and can be displaced in a direction perpendicular to the surface of the inner support plate of the product.

[0015] Based on the above, the beneficial effect of the floating guide vanes arranged along the length of the inner support plate of the product is that they can cover a large support area inside the product when the fixture rotates, realizing multi-point, segmented disturbance and guidance of the liquid flowing through the inner wall of the product, effectively breaking the continuous liquid film and promoting more efficient flow of the liquid into the guide channel; the beneficial effect of having several grooves evenly arranged on the support surface of the inner support plate of the product is that it provides independent installation and movement space for each floating guide vane, and creates a structural basis for liquid collection and guidance; the bottom of the groove is provided with a guide channel. The beneficial effect of the channel is to collect the liquid disturbed and collected by the floating guide plate and guide it to be quickly discharged from the inside of the product along a preset path, avoiding local accumulation of liquid in the tank. The middle part of the floating guide plate is rotatably connected to the tank through a rotating shaft, and the beneficial effect of the clearance fit between the rotating shaft and the shaft hole on the tank is that the floating guide plate has two degrees of freedom of motion: rotation around the rotating shaft and displacement in the vertical direction. This realizes the complex dynamic behavior of the floating guide plate in comprehensively responding to centrifugal force, fluid impact force and its own gravity, and provides the core motion mechanism for its adaptive flow guiding function.

[0016] Furthermore, in its natural state, the lower surface of the floating guide plate fits against the bottom contour of the trough and covers the top of the guide channel. The bottom of the trough is used to limit the deflection angle of the floating guide plate around the axis of rotation to within a range of ±45 degrees.

[0017] Based on the above, the beneficial effect of the floating guide vane's lower surface fitting against the bottom contour of the tank in its natural state is that it can close the opening of the tank when the fixture is stationary or rotating at low speed, thus preventing contaminants from falling into the flow channel at the bottom of the tank and ensuring the cleanliness and smooth flow of the mechanism. The beneficial effect of the bottom of the tank limiting the deflection angle of the floating guide vane around the axis of rotation to within ±45 degrees is that it constrains the swing amplitude of the floating guide vane through mechanical interference, preventing the floating guide vane from excessively flipping at an angle or colliding with surrounding components under fluid impact, thus ensuring its reliability and service life.

[0018] Furthermore, the extended support assembly also includes a lateral extended rod connecting the support trunk and the inner support piece of the product.

[0019] Based on the above, the beneficial effect of the lateral extension rod is that it reliably positions and supports the inner support piece of the product at a certain radial distance from the clamping point on the inner side of the product, ensuring the effective transmission of the support force and the reasonable distribution of the support area.

[0020] Furthermore, the mounting bearing is a sleeve bearing, and the inner ring of the mounting bearing is used for fixed installation to external equipment.

[0021] Furthermore, spring positioning components are provided on the inner side of the pressing part of both the main straight rod and the bending pressure rod, and a pressing spring is connected between the two spring positioning components.

[0022] Based on the above, the beneficial effects of the spring positioning component are that it precisely limits and fixes the end of the pressing spring, preventing the pressing spring from slipping or shifting position during repeated compression and rebound, thus ensuring the stability of the clamping force transmission; the beneficial effects of the pressing spring are that it drives the clamping ends of the main straight rod and the bent pressing rod to remain closed in the natural state, realizing the normally closed function of the split spring clamp, and providing elastic restoring force when the operator presses the pressing part, ensuring the convenience of clamping operation and automatic reset capability.

[0023] Furthermore, hinge plates are respectively provided on both sides of the clamping end of the main straight rod, and the clamping end of the bending pressure rod is hinged between the two hinge plates.

[0024] Based on the above, the beneficial effect of the hinge plate is that it evenly distributes the force of the bending pressure bar onto the hinge plate, realizing the smooth transmission of force and motion guidance of the lever mechanism at the clamping end, avoiding the jamming or additional bending moment that may occur with unilateral hinge, and ensuring the reliability and durability of the point spring clamp action.

[0025] To more clearly illustrate the above-mentioned features of this utility model and the objectives it aims to achieve, the present utility model will be further described below in conjunction with the accompanying drawings and specific embodiments. Attached Figure Description

[0026] Figure 1 : This is a schematic diagram of the present invention; Figure 2 :for Figure 1 An enlarged schematic diagram of part A; Figure 3 This is a schematic diagram of the point-split spring clip of this utility model; Figure 4 This is a side view of the multi-point synchronous clamping module of this utility model. Figure 5 This is a schematic diagram showing the vertical movement of the floating guide vane in the centrifugal guide mechanism of this utility model. Figure 6 : This is a schematic diagram of the floating guide plate blocking the guide channel in the centrifugal guide mechanism of this utility model; Figure 7 : This is a schematic diagram showing the floating guide plate of the centrifugal guide mechanism of this utility model rising to be flush with the upper surface of the inner support plate of the product; Figure 8 This is a schematic diagram of the rotational movement of the floating guide vane of the centrifugal guide mechanism of this utility model in turbulent flow.

[0027] Explanation of reference numerals: 1-Installation bearing, 2-Multi-point synchronous clamping module, 21-Support main body, 22-Point clamping assembly, 221-Point spring clamp, 2211-Main body straight rod, 2212-Bending pressure rod, 2213-Spring positioning component, 2214-Pressing spring, 2215-Hinge piece, 222-Adaptive anti-slip mechanism, 2221-Installation groove, 2222-Preload spring, 2223-Floating anti-slip block, 2224-Anti-slip structure, 23-Extended support assembly, 231-Lateral extended rod, 232-Product inner support long piece, 233-Centrifugal guide mechanism, 2331-Floating guide piece, 2332-Rotating shaft, 234-Groove, 235-Guide channel. Detailed Implementation

[0028] like Figures 1-8 As shown, a multi-station, multi-point synchronous clamping fixture with a sleeve bearing structure includes a mounting bearing 1 and several multi-point synchronous clamping modules 2 circumferentially disposed on the outer edge of the mounting bearing 1. The multi-point synchronous clamping module 2 includes a support main body 21, a point clamping assembly 22 disposed at the outer end of the support main body 21, and an extended support assembly 23 disposed at the outer end of the support main body 21. The inner side of the clamping end of the point clamping assembly 22 is provided with an adaptive anti-slip mechanism 222. The extended support assembly 23 includes an inner support piece 232 of the product, and a centrifugal guide mechanism 233 is provided on the support surface of the inner support piece 232 of the product.

[0029] The adaptive anti-slip mechanism 222 includes a mounting groove 2221 opened on the inner side of the clamping end of the point clamping assembly 22, a preload spring 2222 disposed in the mounting groove 2221, and a floating anti-slip block 2223 connected by the preload spring 2222. The clamping surface of the floating anti-slip block 2223 is provided with an anti-slip structure 2224.

[0030] The point clamping assembly 22 includes two symmetrically arranged point spring clamps 221. Each point spring clamp 221 includes a main straight rod 2211 and a bending pressure rod 2212. The adaptive anti-slip mechanism 222 is provided on the inner side of the clamping end of both the main straight rod 2211 and the bending pressure rod 2212.

[0031] The anti-slip structure 2224 on the floating anti-slip block 2223 of the two point spring clips 221 is a mutually cooperating staggered toothed surface.

[0032] The centrifugal flow guiding mechanism 233 consists of several floating flow guiding plates 23311 arranged along the length of the inner support plate 232 of the product. Several grooves 234 are evenly arranged on the support surface of the inner support plate 232 of the product. A flow guiding channel 235 is provided at the bottom of the groove 234. The middle part of the floating flow guiding plate 23311 is rotatably connected to the groove 234 through a rotating shaft 2332. The rotating shaft 2332 and the shaft hole on the groove are in clearance fit, so that the floating flow guiding plate 2331 can rotate around the rotating shaft 2332 and can be displaced in a direction perpendicular to the surface of the inner support plate 232 of the product.

[0033] In its natural state, the lower surface of the floating guide plate 2331 fits against the bottom contour of the groove 234 and covers the top of the guide channel 235. The bottom of the groove 234 is used to limit the deflection angle of the floating guide plate 2331 around the rotating shaft 2332 to within a range of ±45 degrees.

[0034] The extended support assembly 23 also includes a lateral extended rod 231 that connects the support trunk 21 to the inner support piece 232 of the product.

[0035] The mounting bearing 1 is a sleeve bearing, and the inner ring of the mounting bearing 1 is used for fixed installation to external equipment.

[0036] Both the main straight rod 2211 and the bending pressure rod 2212 are provided with spring positioning parts 2213 on the inner side of the pressing part, and a pressing spring 2214 is provided between the two spring positioning parts 2213.

[0037] The main straight rod 2211 has hinge pieces 2215 on both sides of its clamping end, and the clamping end of the bending pressure rod 2212 is hinged between the two hinge pieces 2215.

[0038] In summary, the specific embodiments of this utility model are as follows: In the initial state, the mounting bearing 1 is fixed on the external equipment, and the multi-point synchronous clamping modules 2 are arranged in a circle. The operator applies force to the pressing part of the main straight rod 2211 and the bending pressure rod 2212 of the point clamping assembly 22, so that the pressing spring 2214 is compressed, which drives the bending pressure rod 2212 to rotate around its hinge point with the hinge piece 2215, thereby opening the clamping ends of the two point spring clamps 221. Then the workpiece is placed in, the pressing part is released, and under the action of the restoring force of the pressing spring 2214, the clamping ends of the point spring clamps 221 close, and the workpiece is initially clamped. During this clamping process, the adaptive anti-slip mechanism 222, located on the inner side of the clamping end of the main straight rod 2211 and the bending pressure rod 2212, begins to function. The floating anti-slip block 2223, under the continuous pressure of the pre-compression spring 2222, closely adheres to the outer surface of the workpiece. The anti-slip structure 2224 on its surface, especially the interlocking toothed surfaces that cooperate with each other, increases the friction between the workpiece and the workpiece, effectively preventing the workpiece from slipping during subsequent rotation. At the same time, the inner support plate 232 of the product, connected by the lateral extension rod 231, provides radial support from the inside of the workpiece, forming an inner and outer clamping force with the point clamping assembly 22, jointly resisting the deformation that may be caused by centrifugal force and clamping force. When the external equipment drives the bearing 1 to rotate and the fixture enters the spraying or cleaning condition, the centrifugal guide mechanism 233 starts to work dynamically. As the rotation speed increases, the centrifugal force causes the floating guide plate 23311 to overcome gravity, and its lower surface gradually separates from the bottom of the tank 234, and the whole is displaced upward, making room above the guide channel 235. The sprayed liquid impacts the inside of the workpiece and generates turbulence. Under the action of centrifugal force, this liquid is thrown towards the inner support plate 232 of the product. At this time, the floating guide plate 23311, which can rotate around the rotating shaft 2332 and can be vertically displaced, generates repeated deflection within a range of ±45 degrees under the impact of the fluid. This deflection angle is limited by the bottom structure of the tank 234. This compound motion effectively disrupts the flow boundary layer of the liquid, guides the liquid into the guide channel 235 at the bottom of the tank 234, and makes it quickly thrown out along the guide channel 235. In the final spin-drying stage, the fixture maintains high-speed rotation, and the floating guide vane 23311 remains in a raised state under the continuous centrifugal force, ensuring that the guide channel 235 is completely unobstructed. The residual liquid is efficiently collected and discharged, avoiding the formation of liquid accumulation in specific areas inside the workpiece, thereby achieving a uniform and thorough spin-drying effect. After the entire process is completed, the fixture speed is reduced until it stops, and the floating guide vane 23311 falls back under the action of gravity. Its lower surface re-fits the bottom contour of the tank 234, covering the guide channel 235, completing a complete work cycle.

[0039] The above description is only the optimal solution embodiment of this utility model and is not intended to limit this utility model. Various modifications or substitutions made by those skilled in the art to this utility model without departing from the essence and protection scope of this utility model should also be within the protection scope of this utility model.

Claims

1. A multi-station, multi-point synchronous clamping fixture with a sleeve bearing structure, characterized in that: The device includes a mounting bearing (1) and several multi-point synchronous clamping modules (2) circumferentially arranged on the outer edge of the mounting bearing (1). The multi-point synchronous clamping module (2) includes a support main body (21), a point clamping assembly (22) arranged at the outer end of the support main body (21), and an extension support assembly (23) arranged at the outer end of the support main body (21). The inner side of the clamping end of the point clamping assembly (22) is provided with an adaptive anti-slip mechanism (222). The extension support assembly (23) includes an inner support piece (232) of the product. The support surface of the inner support piece (232) of the product is provided with a centrifugal guide mechanism (233).

2. The multi-station, multi-point synchronous clamping fixture for a sleeve bearing structure according to claim 1, characterized in that: The adaptive anti-slip mechanism (222) includes a mounting groove (2221) opened inside the clamping end of the point clamping assembly (22), a preload spring (2222) disposed in the mounting groove (2221), and a floating anti-slip block (2223) connected by the preload spring (2222). The clamping surface of the floating anti-slip block (2223) is provided with an anti-slip structure (2224).

3. The multi-station, multi-point synchronous clamping fixture for a sleeve bearing structure according to claim 1, characterized in that: The point clamping assembly (22) includes two symmetrically arranged point spring clamps (221). The point spring clamp (221) includes a main straight rod (2211) and a bending pressure rod (2212). The adaptive anti-slip mechanism (222) is provided on the inner side of the clamping end of the main straight rod (2211) and the bending pressure rod (2212).

4. The multi-station, multi-point synchronous clamping fixture for a sleeve bearing structure according to claim 3, characterized in that: The anti-slip structure (2224) on the floating anti-slip block (2223) of the two said split point spring clips (221) is an interlocking toothed surface that cooperates with each other.

5. The multi-station, multi-point synchronous clamping fixture for a sleeve bearing structure according to claim 1, characterized in that: The centrifugal flow guiding mechanism (233) consists of several floating flow guiding plates (2331) arranged along the length of the inner support plate (232) of the product. Several grooves (234) are evenly arranged on the support surface of the inner support plate (232). A flow guiding channel (235) is provided at the bottom of the groove (234). The middle part of the floating flow guiding plate (2331) is rotatably connected to the groove (234) through a rotating shaft (2332). The rotating shaft (2332) and the shaft hole on the groove are in clearance fit, so that the floating flow guiding plate (2331) can rotate around the rotating shaft (2332) and can be displaced in a direction perpendicular to the surface of the inner support plate (232) of the product.

6. The multi-station, multi-point synchronous clamping fixture for a sleeve bearing structure according to claim 5, characterized in that: In its natural state, the lower surface of the floating guide vane (2331) fits against the bottom contour of the groove (234) and covers the top of the guide channel (235). The bottom of the groove (234) is used to limit the deflection angle of the floating guide vane (2331) around the rotating shaft (2332) to within ±45 degrees.

7. The multi-station, multi-point synchronous clamping fixture for a sleeve bearing structure according to claim 1, characterized in that: The extended support assembly (23) also includes a lateral extended rod (231) connecting the support trunk (21) and the inner support piece (232) of the product.

8. The multi-station, multi-point synchronous clamping fixture for a sleeve bearing structure according to claim 1, characterized in that: The mounting bearing (1) is a sleeve bearing, and the inner ring of the mounting bearing (1) is used for fixed installation to external equipment.

9. A multi-station, multi-point synchronous clamping fixture for a sleeve bearing structure according to claim 3, characterized in that: The inner side of the pressing part of the main straight rod (2211) and the bending pressure rod (2212) is provided with a spring positioning member (2213), and a pressing spring (2214) is provided between the two spring positioning members (2213).

10. A multi-station, multi-point synchronous clamping fixture for a sleeve bearing structure according to claim 3, characterized in that: The main straight rod (2211) has hinge plates (2215) on both sides of its clamping end, and the clamping end of the bending pressure rod (2212) is hinged between the two hinge plates (2215).

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