Internal supporting jig

Abstract

The utility model relates to the technical field of jigs, in particular to an inner supporting jig which comprises a driving mechanism and executing mechanisms, the executing mechanisms are detachably installed on the driving mechanism and are in driving connection with the driving mechanism, a material disc is movably arranged below the executing mechanisms, and a plurality of workpieces distributed at equal intervals are movably arranged on the material disc. The driving mechanism comprises a frame, a sliding adjusting frame and a driving assembly, the internal supporting jig drives a stroke shaft to be in linkage with a rack and a connecting rod through an air cylinder, the position of the stroke shaft is adjusted by combining a locking bolt so as to accurately control the opening degree of a clamping jaw and adapt to workpieces with different inner diameters, and a buffer spring and a stroke shaft buffer pad in the executing mechanism cooperatively absorb impact and balance clamping force; overload damage is avoided; according to the modularized executing mechanisms, the number and the distance of the executing mechanisms can be adjusted through flexible arrangement of the sliding blocks on the sliding adjusting frame, equidistant synchronous clamping or special-shaped contour adaptation of multiple workpieces is achieved through the cooperation of the modularized executing mechanisms and the detachable clamping jaws, and the flexible production capacity is remarkably improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to jig technical field, concretely is a kind of inner support jig. BACKGROUND

[0002] The inner support jig is a kind of fixture device for fixing and positioning workpiece, it is expanded by being applied to workpiece inside, makes workpiece be firmly clamped from inside to outside, to realize stable support, this design is suitable for hollow parts, avoids deformation or damage possibly caused by outer clamp, its structure usually includes inflatable inner core and driving mechanism, by adjusting driving mechanism to make the diameter of inner core increase, tightly adhere to workpiece inner wall, ensure high-precision positioning when processing or detecting, inner support jig is easy to operate, can be quickly clamped and disassembled, widely used in the production and processing of parts in automobile, aviation and other industries.

[0003] The inner support jig can effectively improve production efficiency and product quality, but it still has some problems: 1) the traditional three-jaw cylinder drive has poor adaptability and low synchronization accuracy, which causes uneven wear; 2) rigid impact damages the workpiece; 3) the clamping efficiency of multiple workpieces is insufficient; therefore, in view of the above status, it is urgent to develop an inner support jig to overcome the shortcomings in current practical applications and meet the current needs. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing an inner support jig to solve the problems raised in the background art.

[0005] To achieve the above object, the utility model provides the following technical scheme: an inner support jig, comprising a driving mechanism and an execution mechanism, a plurality of execution mechanisms are detachably installed on the driving mechanism, the execution mechanism is drivingly connected with the driving mechanism, a tray is movably arranged below the execution mechanism, and a plurality of workpieces are movably arranged on the tray at equal intervals.

[0006] The driving mechanism comprises a frame, a sliding adjusting frame and a driving assembly, the sliding adjusting frame is horizontally installed in the frame, the driving assembly is installed on the frame, the driving assembly comprises a cylinder, a limiting sleeve, a stroke shaft and a connecting rod and a rack, the cylinder and the limiting sleeve are sequentially installed horizontally on the frame, one end of the stroke shaft is movably arranged in the limiting sleeve, a shaft seat is slidably arranged on the connecting rod, the shaft seat is fixedly arranged on the frame, one end of the connecting rod is fixedly provided with a connecting frame a, one end of the connecting frame a is slidably arranged on the stroke shaft, a locking bolt for fixing the stroke shaft is threadedly connected to the connecting frame a, a buffer pad is installed at one end of the stroke shaft in the limiting sleeve, a piston rod of the cylinder is movably arranged in the limiting sleeve, and the piston rod of the cylinder is coaxial with the stroke shaft, specifically, a buffer pad with the same structure as the stroke shaft is arranged at the end of the piston rod of the cylinder, when the piston rod moves towards the outside of the cylinder, it will finally contact the buffer pad of the stroke shaft and force the stroke shaft to displace, and the buffer pad can have a buffering effect.

[0007] Preferably, a positioning disc is fixed on the connecting rod, a spring is sleeved on the connecting rod, and the spring is located between the shaft seat and the positioning disc. Specifically, the spring is a buffer return spring. By arranging the positioning disc and the spring on the connecting rod and locating the spring between the shaft seat and the positioning disc, the buffer and shock absorption effects can be achieved during mechanical transmission, mechanical damage caused by impact or vibration can be effectively reduced, the stability and reliability of transmission can be improved, and the service life of the equipment can be prolonged.

[0008] Preferably, a rack is slidably arranged in the frame, and a connecting frame b is arranged between the end of the rack and the end of the connecting rod. Specifically, when the connecting rod moves, the rack is driven to move synchronously through the connecting frame b.

[0009] Preferably, the actuator comprises a shell, a top cover, a screw rod, a top disc, a sliding disc, a sliding claw and a clamping claw. The top cover is detachably arranged at the top end of the shell. The screw rod is arranged at the middle position of the top cover and is connected with the top cover through threads. A gear is sleeved on the top end of the screw rod. The top disc is fixed at the bottom end of the screw rod. The sliding disc is slidably arranged in the shell. A buffer spring is arranged between the top disc and the sliding disc. A plurality of sliding claws are slidably arranged at the bottom end of the shell. The clamping claw is detachably arranged at the bottom of the sliding claw. Specifically, the actuator realizes precise lifting adjustment through the threaded transmission of the screw rod and the gear, and cooperates with the buffer spring between the top disc and the sliding disc, so as to buffer the impact, balance the clamping force, and avoid overload damage. The modular design of the sliding claw and the clamping claw supports quick replacement, adapts to different working conditions, and the detachable structure of the shell and the top cover is convenient for maintenance. The whole has the advantages of high precision, impact resistance, multipurpose and easy maintenance.

[0010] Preferably, a sliding block is arranged on the top cover and is slidably connected with the sliding adjusting frame. A locking screw is arranged on the sliding block to fix the sliding block. Specifically, the sliding block and the sliding adjusting frame are slidably connected to realize flexible adjustment and precise positioning of the horizontal position of the actuator, so as to meet the requirements of different working conditions. The locking screw can quickly fix the position of the sliding block to avoid displacement caused by vibration or load during operation, and ensure the clamping stability. The modular design simplifies the adjustment process, reduces the maintenance difficulty, and the compact structure takes into account the space utilization rate and functional expansibility.

[0011] Preferably, an inclined table is arranged on the inner wall of the sliding claw, and the bottom of the sliding disc is conical. The inclined table of the sliding claw is slidably connected with the bottom of the sliding disc. Specifically, the conical surface of the bottom of the sliding disc is slidably connected with the inclined table of the sliding claw to efficiently convert the axial movement of the sliding disc into the radial synchronous expansion and contraction of the sliding claw, so as to simplify the transmission mechanism, reduce the friction loss, ensure the precise synchronization of the opening and closing action of the clamping claw, and evenly distribute the clamping force. The conical surface self-centering feature enhances the system rigidity, avoids partial load jamming, and optimizes the space layout through compact design to improve the overall stability and durability.

[0012] Preferably, the thickness of the gear is greater than the thickness of the rack, specifically, by increasing the thickness of the gear, it is always fully engaged with the rack during lifting, and the risk of tooth disengagement is avoided during axial displacement, thereby ensuring the continuity and stability of transmission; the increased meshing contact area of the thickened gear can disperse the load, reduce the wear of the tooth surface, and at the same time, enhance the anti-unbalanced load capacity, prolong the service life of the gear and rack, ensure the precision and reliability of the lifting action, and reduce the maintenance cost caused by transmission failure.

[0013] Preferably, a reset spring is embedded between the sliding claw and the inner wall of the shell, specifically, the embedded design of the reset spring can provide elastic restoring force after the sliding claw completes the clamping or releasing action, drive the sliding claw to automatically reset to the initial position, ensure that the clamping claw quickly returns to the original position and maintains a stable standby state; at the same time, it can reduce the rigid collision and friction loss between the sliding claw and the shell, prolong the service life of the components, and further optimize the structural space, ensure the continuity of the action and the reliability of the system.

[0014] Compared with the prior art, the utility model provides an inner support jig, which has the following beneficial effects:

[0015] The inner support jig drives the stroke shaft linkage rack and connecting rod through the air cylinder, adjusts the stroke shaft position in combination with the locking bolt to accurately control the opening and closing degree of the clamping claw, adapts to different inner diameter workpieces, and the buffer spring in the actuator and the stroke shaft buffer pad cooperatively absorb impact and balance the clamping force to avoid overload damage; the modular actuator can adjust the number and spacing of the actuator through flexible arrangement of the sliding block on the sliding adjustment frame, realize equidistant synchronous clamping of multiple workpieces or special-shaped contour adaptation in cooperation with the detachable clamping claw, and significantly improve the flexible production capacity; the conical surface transmission and self-centering design ensure high-precision synchronous expansion and contraction of the clamping claw, compared with the traditional three-jaw air cylinder drive, have the advantages of high rigidity, anti-unbalanced load, complex inner cavity adaptability and fast reconfiguration, and at the same time, the compact adjustable structure and the buffer mechanism reduce the maintenance cost and prolong the service life, meet the efficient and high-stability machining requirements. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical scheme in the embodiments of the utility model, the following will briefly introduce the drawings needed to be used in the embodiment description, obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained according to these drawings without creating creative labor:

[0017] Figure 1 It is the front structure schematic diagram of the utility model;

[0018] Figure 2 It is the front structure schematic diagram of the driving mechanism and the actuator of the utility model;

[0019] Figure 3The utility model discloses a driving mechanism and execution mechanism side structure schematic view;

[0020] Figure 4 The utility model discloses a driving mechanism structure schematic view one;

[0021] Figure 5 The utility model discloses a driving mechanism structure schematic view two;

[0022] Figure 6 The utility model discloses an execution mechanism structure schematic view;

[0023] Figure 7 The utility model discloses an execution mechanism explosion map;

[0024] Figure 8 The utility model discloses an execution mechanism partial section view.

[0025] In the drawing: 10, tray;110, workpiece;20, driving mechanism;210, frame;220, sliding adjusting frame;230, driving assembly;231, air cylinder;232, limit sleeve;233, stroke shaft;2331, buffer pad;234, connecting frame a;2341, locking bolt;235, connecting rod;2351, shaft seat;2352, spring;2353, positioning disc;236, connecting frame b;237, rack;30, execution mechanism;310, shell;320, top cover;321, sliding block;330, gear;340, screw;350, top disc;360, buffer spring;370, sliding disc;380, sliding claw;381, inclined table;382, reset spring;390, clamping jaw. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the utility model will be apparently and completely described below with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all the other embodiments obtained by the ordinary skill in the art without creative work belong to the scope of the utility model.

[0027] In the utility model, unless another explicit provision and limitation, the terms "mount", "connect", "joint", "fix" and other terms should be understood broadly, for example, can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can be indirectly connected through the intermediate medium, can be the intercommunication of two elements or the interaction of two elements. For the ordinary skill in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0028] Embodiment:

[0029] Referring to Figures 1-8 The utility model provides a technical scheme: a inner support jig, including drive mechanism 20 and executing mechanism 30, a plurality of executing mechanism 30 can be detached and installed on drive mechanism 20, and executing mechanism 30 is drivenly connected with drive mechanism 20, and the tray 10 movably arranged below executing mechanism 30, and a plurality of equidistance distributed workpieces 110 movably arranged on the tray 10,

[0030] Drive mechanism 20 includes frame 210, sliding adjustment frame 220 and drive assembly 230, sliding adjustment frame 220 is horizontally installed in frame 210, drive assembly 230 is installed on frame 210, drive assembly 230 includes cylinder 231, limiting sleeve 232, stroke shaft 233 and connecting rod 235 and rack 237, cylinder 231, limiting sleeve 232 are sequentially installed horizontally on frame 210, one end of stroke shaft 233 is movably arranged in limiting sleeve 232, shaft seat 2351 is slidably arranged on connecting rod 235, and shaft seat 2351 is fixedly arranged on frame 210, one end of connecting rod 235 is fixedly provided with connecting frame a 234, one end of connecting frame a 234 is slidably arranged on stroke shaft 233, locking bolt 2341 for fixing stroke shaft 233 is threadedly connected on connecting frame a 234, one end of stroke shaft 233 in limiting sleeve 232 is provided with buffer pad 2331, the piston rod end of cylinder 231 is movably arranged in limiting sleeve 232, and the piston rod of cylinder 231 is coaxial with stroke shaft 233, specifically, the piston rod end of cylinder 231 is provided with buffer pad 2331 identical with stroke shaft 233, when the piston rod moves towards cylinder 231, finally contacts the buffer pad 2331 of stroke shaft 233, and stroke shaft 233 is forced to displace, and buffer pad 2331 can play a buffering effect.

[0031] Preferably, the connecting rod 235 is fixedly provided with a positioning disc 2353, and a spring 2352 is sleeved on the connecting rod 235, and the spring 2352 is located between the shaft seat 2351 and the positioning disc 2353, specifically, the spring 2352 is a buffer reset spring, by arranging the positioning disc 2353 and the spring 2352 on the connecting rod 235 and locating the spring 2353 between the shaft seat 2351 and the positioning disc 2353, the spring 2352 can play a buffering and damping role in the mechanical transmission process, effectively reducing the mechanical damage caused by impact or vibration, improving the stability and reliability of transmission, and also helping to prolong the service life of the equipment.

[0032] Preferably, the rack 237 is slidably installed in the frame 210, and a connecting frame b 236 is installed between the end of the rack 237 and the end of the connecting rod 235, specifically, when the connecting rod 235 displaces, the rack 237 is driven to move synchronously through the connecting frame b 236.

[0033] Preferably, the actuator 30 comprises a shell 310, a top cover 320, a screw rod 340, a top disc 350, a sliding disc 370, a sliding claw 380 and a clamping claw 390, the top cover 320 is detachably mounted at the top end of the shell 310, the screw rod 340 is arranged at the middle position of the top cover 320 and is connected with the top cover 320 through threads, the top end of the screw rod 340 is sleeved with a gear 330, the top disc 350 is fixedly arranged at the bottom end of the screw rod 340, the sliding disc 370 is slidably arranged in the shell 310, the buffer spring 360 is arranged between the top disc 350 and the sliding disc 370, the sliding claw 380 is slidably arranged at the bottom end of the shell 310, and the clamping claw 390 is detachably arranged at the bottom of the sliding claw 380. Specifically, the actuator 30 realizes precise lifting adjustment through the threaded transmission of the screw rod 340 and the gear 330, and cooperates with the buffer spring 360 between the top disc 350 and the sliding disc 370, so as to not only buffer the impact and balance the transmission of the clamping force, but also avoid overload damage; the modular design of the sliding claw 380 and the clamping claw 390 supports quick replacement, adapts to different working conditions, and the detachable structure of the shell 310 and the top cover 320 is convenient for maintenance, and the whole has the advantages of high precision, impact resistance, multipurpose and easy maintenance.

[0034] Preferably, the top cover 320 is provided with a sliding block 321, the sliding block 321 is slidably connected with the sliding adjusting frame 220, and a locking screw can be arranged on the sliding block 321 for fixation. Specifically, the sliding block 321 and the sliding adjusting frame 220 are slidably connected, so as to realize flexible adjustment and precise positioning of the horizontal position of the actuator 30, and meet the needs of different working conditions; the locking screw can quickly fix the position of the sliding block, avoid displacement caused by vibration or load during operation, and ensure the clamping stability. The modular design simplifies the adjustment process, reduces the maintenance difficulty, and at the same time, the compact structure takes into account the space utilization rate and functional expansibility.

[0035] Preferably, the inner wall of the sliding claw 380 is provided with an inclined table 381, the bottom of the sliding disc 370 is conical, and the inclined table 381 of the sliding claw 380 is slidably connected with the bottom of the sliding disc 370. Specifically, the conical surface at the bottom of the sliding disc 370 is slidably connected with the inclined table 381 of the sliding claw 380, so as to efficiently convert the axial movement of the sliding disc 370 into the radial synchronous expansion and contraction of the sliding claw 380, which not only simplifies the transmission mechanism and reduces the friction loss, but also ensures the precise synchronization of the opening and closing action of the clamping claw 390 and the uniform distribution of the clamping force; the conical surface self-centering feature enhances the system rigidity, avoids partial load jamming, and at the same time, the compact design optimizes the space layout, improves the overall stability and durability.

[0036] Preferably, the thickness of the gear 330 is greater than that of the rack 237, specifically, by increasing the thickness of the gear 330, it is always fully engaged with the rack 237 during lifting, avoiding the risk of tooth disengagement during axial displacement, thereby ensuring the continuity and stability of transmission; the increased meshing contact area of the thickened gear 330 can disperse the load, reduce the tooth surface wear, and at the same time enhance the anti-unbalanced load capacity, prolong the service life of the gear 330 and the rack 237, ensure the precision and reliability of the lifting action, and reduce the maintenance cost caused by transmission failure.

[0037] Preferably, the reset spring 382 is embedded between the sliding claw 380 and the inner wall of the shell 310, specifically, the embedded design of the reset spring 382 can provide elastic recovery force after the sliding claw 380 completes the clamping or releasing action, driving the sliding claw 380 to automatically reset to the initial position, ensuring that the clamping claw 390 quickly returns to the original position and maintains a stable standby state; at the same time, it can reduce the rigid collision and friction loss between the sliding claw 380 and the shell 310, prolong the service life of the components, and its compact layout further optimizes the structural space, ensuring the continuity of the action and the reliability of the system.

[0038] Working principle: the driving mechanism 20 drives a plurality of groups of execution mechanism 30 to move synchronously, through the clamping jaw 390 at the bottom of the execution mechanism 30 to support and clamp the plurality of hollow workpieces 110 synchronously, when the driving mechanism 20 works, the cylinder 231 starts, the piston rod end thereof contacts the buffer pad 2331 and forces the travel shaft 233 to displace, the travel shaft 233 cooperates with the connecting frame a 234 to drive the connecting rod 235 to move synchronously, then through the connecting frame b 236 to drive the rack 237 to move synchronously, the rack 237 meshes with the gear 330 of the execution mechanism 30, thereby driving the gear 330 and the screw rod 340 to rotate, the screw rod 340 cooperates with the top cover 320 in screw thread, thus the screw rod 340 rotates to drive the top disc 350 connected therewith to descend, and cooperates with the buffer spring 360 to drive the sliding disc 370 to descend, the conical slope at the bottom of the sliding disc 370 is adapted to the inclined table 381 of the sliding jaw 380, thereby driving the three sliding jaws 380 to move outward synchronously, and finally driving the clamping jaw 390 to move outward synchronously, thereby realizing the inside support of the clamping jaw 390 in the hollow workpiece 110 and the inside clamping effect of the workpiece 110, when the cylinder 231 resets, the connecting rod 235 resets automatically under the action of the spring 2352 and the positioning disc 2353, thereby driving the travel shaft 233 and the rack 237 to reset, and cooperates with the gear 330 to drive the screw rod 340 and the top disc 350 to reset, at this time the sliding jaw 380 is not restricted and resets automatically under the action of the reset spring 382, it is to be explained here that the installation position of the clamping jaw 390 on the sliding jaw 380 can be adjusted according to the inner diameter of the workpiece 110, so as to adapt to each other, when the movement stroke of the rack 237 needs to be adjusted, the length of the travel shaft 233 in the limiting sleeve 232 is adjusted and cooperates with the locking bolt 2341 to fix, that is, the stroke of the rack 237 can be freely adjusted under the condition that the stroke of the cylinder 231 is unchanged.

[0039] It is to be noted that, in the present text, relational terms such as first and second and the like can only be used to distinguish one entity or action from another entity or action, without necessarily requiring or implying that there is any such actual relationship or order between these entities or actions. Moreover, the terms "comprising", "containing" or any other variant thereof are intended to cover non-exclusive inclusions, so that a process, method, article or apparatus that includes a list of elements not only includes those elements, but also includes other elements not explicitly listed, or further includes elements inherent in such a process, method, article or apparatus. Without more limitations, the element defined by the phrase "comprising a" does not exclude the presence of additional identical elements in the process, method, article or apparatus that includes the element.

Claims

1. An internal support fixture, characterized in that: It includes a drive mechanism (20) and an actuator (30). Several actuators (30) are detachably mounted on the drive mechanism (20). The actuators (30) are drivenly connected to the drive mechanism (20). A material tray (10) is movably arranged below the actuator (30). Several workpieces (110) are movably arranged on the material tray (10). The drive mechanism (20) includes a frame (210), a sliding adjustment bracket (220), and a drive assembly (230). The sliding adjustment bracket (220) is horizontally installed inside the frame (210). The drive assembly (230) is installed on the frame (210). The drive assembly (230) includes a cylinder (231), a limiting sleeve (232), a stroke shaft (233), a connecting rod (235), and a rack (237). The cylinder (231) and the limiting sleeve (232) are horizontally installed sequentially on the frame (210). One end of the stroke shaft (233) is movably disposed inside the limiting sleeve (232). The connecting rod (235) is slidably sleeved on the limiting sleeve (232). There is a bearing seat (2351), which is fixed on the frame (210). One end of the connecting rod (235) is fixed with a connecting bracket a (234). One end of the connecting bracket a (234) is slidably sleeved on the stroke shaft (233). The connecting bracket a (234) is threaded with a locking bolt (2341) for fixing the stroke shaft (233). One end of the stroke shaft (233) located in the limiting sleeve (232) is equipped with a buffer pad (2331). The piston rod end of the cylinder (231) is movably set in the limiting sleeve (232), and the piston rod of the cylinder (231) is coaxial with the stroke shaft (233).

2. The internal support fixture according to claim 1, characterized in that: A positioning disk (2353) is fixed on the connecting rod (235), and a spring (2352) is sleeved on the connecting rod (235). The spring (2352) is located between the bearing seat (2351) and the positioning disk (2353).

3. The internal support fixture according to claim 1, characterized in that: A rack (237) is slidably installed inside the frame (210), and a connecting bracket b (236) is installed between the end of the rack (237) and the end of the connecting rod (235).

4. The internal support fixture according to claim 1, characterized in that: The actuator (30) includes a housing (310), a top cover (320), a screw (340), a top plate (350), a sliding plate (370), a sliding claw (380), and a clamping claw (390). The top cover (320) is detachably installed on the top of the housing (310). The screw (340) passes through the middle of the top cover (320) and is threadedly connected to the top cover (320). A gear (330) is sleeved on the top of the screw (340). The top plate (350) is fixed at the bottom of the screw (340). The sliding plate (370) is slidably installed inside the housing (310). A buffer spring (360) is installed between the top plate (350) and the sliding plate (370). Several sliding claws (380) are slidably installed at the bottom of the housing (310). A clamping claw (390) is detachably installed at the bottom of the sliding claw (380).

5. The internal support fixture according to claim 4, characterized in that: A slider (321) is installed on the top cover (320). The slider (321) is slidably connected to the sliding adjustment bracket (220). A locking screw can be installed on the slider (321) for fixation.

6. The internal support fixture according to claim 4, characterized in that: The inner wall of the sliding claw (380) is provided with a ramp (381), the bottom of the sliding disk (370) is conical, and the ramp (381) of the sliding claw (380) is slidably connected to the bottom of the sliding disk (370).

7. The internal support fixture according to claim 4, characterized in that: The thickness of the gear (330) is greater than the thickness of the rack (237).

8. The internal support fixture according to claim 4, characterized in that: A return spring (382) is embedded between the sliding claw (380) and the inner wall of the housing (310).

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