A combined special device for positioning and pressing of ball hinge

Abstract

The application relates to a combined special device for positioning and pressing of a ball hinge, which comprises a base, a positioning and pressing structure and a follow-up pressing structure; the positioning and pressing structure is manually used to realize the pressing of a ball seat by using the pre-pressure of a first compression spring, and the positioning and pressing of the ball seat are realized by the cooperation of a circular arc surface and a bottom plane; the follow-up pressing structure is used to realize the follow-up of a ball pressing cover by the rotation of a guide sleeve, realize the follow-up pressing by the preset pressure of a second compression spring, and realize the locking or changing of the follow-up pressing force during grinding by a gear and a rack structure; the base is used to change the position state of the ball hinge by a 90-degree V-shaped groove structure, so that the axis of the ball shaft neck ball rod of the ball hinge is in a vertical direction in the three-dimensional space. The application facilitates the grinding operation, guarantees the grinding quality, and improves the working efficiency of grinding.

Description

Technical Field

[0001] This invention belongs to the technical field of mechanical manufacturing, and in particular relates to a special combination device for positioning and clamping ball hinges. Background Technology

[0002] Precision ball joints, as universal mechanisms that enable spherical motion, are widely used in parallel mechanism buffer bases and robots, and are numerous in number. A precision ball joint consists of three parts: a ball seat 1, a ball journal 2, and a ball cap 3. Figure 1 As shown, in the combined grinding process of ball joints, the relevant parts of the ball joint need to be fixed on the working platform of the grinding machine. Based on the working principle of the ball joint, the ball seat needs to be positioned and clamped during combined grinding, and the ball cap needs to be dynamically clamped. During the grinding process, the ball journal is connected to the grinding machine spindle and rotates with the spindle, achieving relative movement between the outer spherical surface of the ball journal and the inner spherical surface formed by the ball seat and ball cap, generating friction. Friction cutting is achieved by coating the ball journal with a diamond abrasive, and the inner spherical surfaces of the ball joint are mutually ground until the design technical requirements are met. In the actual grinding process, a special combined device for positioning and clamping the ball joint needs to be designed to position and clamp the ball seat and dynamically clamp the ball cap. This enables automatic spherical grinding, meets technical requirements, improves production efficiency, improves operating procedures, improves the working environment, and reduces the labor intensity of operators. Summary of the Invention

[0003] In view of the shortcomings of the prior art, the present invention proposes a combined special device for positioning and pressing ball hinges.

[0004] The above-mentioned objective of this invention is achieved through the following technical solution:

[0005] A combined special device for positioning and clamping ball hinges includes a base, a positioning and clamping structure, and a follow-up clamping structure;

[0006] The positioning and clamping structure includes a positioning support and a lateral elastic clamping assembly; the upper end of the positioning support is provided with a ball seat mounting hole, and the bottom surface of the ball seat mounting hole forms a support surface; a grinding fluid discharge groove is connected to the lower part of the positioning support located at the ball seat mounting hole; the lateral elastic clamping assembly is installed on the positioning support on one side outside the ball seat mounting hole in a direction parallel to the support surface, and is clamped to the outer side of the ball seat placed in the ball seat mounting hole by a clamping head to achieve ball seat positioning and clamping;

[0007] The follow-up compression structure comprises an elastic follow-up guide structure and an elastic energy storage and adjusting mechanism acting on the elastic follow-up guide structure; the elastic follow-up guide structure comprises an upper holder, a second compression spring, a lower holder, a support shaft, a guide sleeve and a positioning pin; the lower end of the support shaft is fixedly connected with the upper end of the positioning support of the positioning compression structure on the other side of the ball seat installation hole; the upper holder and the lower holder adopt a cylindrical structure and are movably inserted and fitted; the second compression spring is press-fitted in the upper holder and the lower holder, and the three components form an elastic energy storage assembly; the elastic energy storage assembly is fitted on the support shaft; the guide sleeve is rotatably fitted on the support shaft and below the elastic energy storage assembly; two pin holes are formed on the outer side of the support shaft of the guide sleeve, and two positioning pins are vertically installed in the two pin holes; the two positioning pins are used for being inserted and fitted with the two set pin holes on the ball gland, so as to position the ball gland; the elastic energy storage and adjusting mechanism is integrally installed on the upper end surface of the support shaft and forms a pressure contact with the upper end of the upper holder through the end execution member which can be adjusted in position.

[0008] The base is a cuboid structure, a 90° V-shaped groove is formed in the middle upper part and is composed of an inclined surface A and an inclined surface B; rectangular through holes are formed on both sides of the bottom line of the 90° V-shaped groove for discharging grinding liquid; the inclined surface A is close to the left side surface of the positioning support, and the inclined surface B is close to the bottom surface of the positioning support; threaded holes A and threaded holes B are vertically arranged on the side walls on both sides of the inclined surface B; by installing the fixing screws, the positioning compression structure and the follow-up compression structure are fixed on the base in the form of the vertical upward ball hinge ball shaft rod body.

[0009] Moreover, the lateral elastic compression assembly comprises a compression piece, a locking support, a first compression spring and a handle; a compression piece accommodating groove is formed on one side of the positioning support corresponding to the ball seat installation hole, and a guide through hole is formed on the outer side of the compression piece accommodating groove; the compression piece adopts a rod-shaped compression piece with a compression head arranged at the inner end; the locking support adopts a sleeved support with a flange arranged at one end, and a spring limiting surface is arranged at the end of the locking support away from the flange; the locking support is fixedly installed on the outer side of the positioning support through the flange, and the inner hole of the locking support is coaxially arranged with the guide through hole on the positioning support; the compression piece is sequentially fitted in the guide through hole on the positioning support and the inner hole of the locking support with the compression head facing inward, and the compression piece extends out of the outer end of the locking support; a spring limiting surface is arranged on the end of the rod body of the compression piece close to the compression head; the first compression spring is sleeved on the rod body of the compression piece, and the two ends of the first compression spring are tightly pressed on the spring limiting surfaces on the compression piece and in the inner hole of the locking support, respectively; the handle is arranged on the outer side of the locking support and is fixedly connected with the outer end of the rod body of the locking piece.

[0010] Moreover, two positioning protrusions in 180° are arranged on the side end face of the handle close to the locking support, two sets of positioning grooves are arranged on the outer end of the locking support, the two sets of positioning grooves are arranged in a 90° angle, each set of positioning grooves is composed of two grooves arranged in 180°, one set of the positioning grooves is a shallow groove, and the other set of the positioning grooves is a deep groove; in the matching state of the two positioning protrusions and one set of the deep grooves, the pressing part is in pressing contact with the side face of the ball seat through the pressing head; in the matching state of the two positioning protrusions and one set of the shallow grooves, the pressing head of the pressing part is out of contact with the side face of the ball seat.

[0011] Moreover, the elastic energy storage, retention and adjustment mechanism comprises an operating rod, a rack, a gear, a gear seat, a connecting seat and a guide piece; the guide piece constitutes the end effector, is press-fitted above the upper support, adopts a disc structure, two through holes are arranged on the guide piece, and the upper end of the supporting shaft extends out from the two side parts of the gap slot arranged in the through holes; the connecting seat is arranged above the guide piece, the lower part of the connecting seat is clamped and fixedly connected with the upper end of the supporting shaft; a rack guide groove in the up-down direction is arranged on the connecting seat, the rack is arranged in the rack guide groove, and the lower end of the rack is in pressing contact with the upper end of the guide piece; the gear seat is fixed on the connecting seat, the gear is fixed on the gear shaft, the gear shaft is rotatably supported on the gear seat through ball bearings and bearing seats at both ends of the gear shaft, so that the gear is engaged with the rack; the operating rod is fixedly connected to one end of the gear shaft, and an external braking device is arranged on the other end of the gear shaft.

[0012] The present application has the advantages and positive effects that:

[0013] The positioning and pressing structure can realize the pressing and fixing of the ball seat in the ball hinge, the follow-up pressing structure can realize the ball pressing cover in the ball hinge to be adjusted in the horizontal direction and to be floating in the up-down direction, the positioning and pressing structure and the follow-up pressing structure are matched with the V-shaped groove on the base, the ball shaft neck rod body of the ball hinge can be vertically arranged upward during the grinding operation, the grinding operation is facilitated, the grinding quality is ensured, and the working efficiency of the grinding is improved. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 is a structural schematic diagram of the precision ball hinge;

[0015] Figure 2 is an appearance schematic diagram of the combined special device for positioning and pressing of the ball hinge;

[0016] Figure 3 is an overall sectional view of the combined special device for positioning and pressing of the ball hinge;

[0017] Figure 4is the overall appearance schematic view of the positioning and pressing structure of the present application (ball seat installation state) ;

[0018] Figure 5 is the overall cross-sectional view of the positioning and pressing structure of the present application (ball seat installation state) ;

[0019] Figure 6 is the cross-sectional view of the ball seat supported on the positioning support of the present application;

[0020] Figure 7 is the cooperation schematic view of the handle and the outer end of the locking support in the positioning and pressing structure of the present application;

[0021] Figure 8 is the overall cross-sectional view of the follow-up pressing structure of the present application;

[0022] Figure 9 is the side view (including partial cross-sectional view) of the follow-up pressing structure of the present application;

[0023] Figure 10 is the cross-sectional view of the base of the present application;

[0024] Figure 11 is the perspective view of the base of the present application. DETAILED DESCRIPTION

[0025] The structure of the present application is further described below in combination with the drawings and through examples. It should be noted that the examples are descriptive rather than limiting.

[0026] A combined special device for positioning and pressing of ball hinge, please see Figures 1-11 The invention point is: including base 6, positioning and pressing structure 4 and follow-up pressing structure 5.

[0027] The positioning and pressing structure is to realize the pressing of the ball seat by hand through the pre-pressing force of the spring design, and to realize the positioning and pressing of the ball seat by the cooperation of the circular arc surface and the bottom plane. The follow-up pressing structure is to realize the follow-up of the ball pressing cover through the rotation of the guide sleeve, to realize the follow-up pressing through the pre-set pressure of the spring, and to realize the locking or changing of the follow-up pressing force during grinding through the gear and rack structure. The base changes the position state of the ball hinge through the 90° V-shaped groove structure, so that the axis of the ball shaft neck of the ball hinge is in the vertical direction in the three-dimensional space.

[0028] As Figures 4-7As shown, the positioning and pressing structure is mainly composed of a positioning support 4.1, a pressing member 4.2, a locking support 4.3, a first compression spring 4.5 and a handle 4.4. The pressing member, the locking support, the first compression spring and the handle constitute a lateral elastic pressing assembly. The positioning support is the main body of the positioning and pressing structure. The upper end of the positioning support is provided with a ball seat mounting hole. The bottom surface of the ball seat mounting hole constitutes a supporting surface 4.1.1. The supporting surface is in contact with the bottom surface of the ball seat to support the ball seat. The ball seat mounting hole is in contact with the outer circle of the ball seat. A grinding liquid discharge groove is arranged in the lower part of the ball seat mounting hole. The grinding liquid discharge groove is used for discharging the grinding liquid during grinding. The grinding liquid discharge groove is in the shape of a rectangular slot. A pressing member accommodating groove is arranged on one side of the ball seat mounting hole. A guide through hole is arranged on the outer side of the pressing member accommodating groove. The pressing member is in the shape of a rod with a pressing head arranged at the inner end. The locking support is in the shape of a sleeved support with a flange arranged at one end. A spring limiting surface is arranged at the end of the locking support away from the flange. The locking support is fixedly installed on the outer side of the positioning support through the flange. The inner hole of the locking support is coaxially arranged with the guide through hole on the positioning support. The pressing member is sequentially arranged in the guide through hole on the positioning support and the inner hole of the locking support with the pressing head facing inward from the inside to the outside. The pressing member extends out of the outer end of the locking support. A spring limiting surface is arranged on the end of the rod body of the pressing member close to the pressing head. The first compression spring is sleeved on the rod body of the pressing member. The two ends of the first compression spring are pressed on the spring limiting surfaces on the pressing member and in the inner hole of the locking support, respectively. The handle is arranged on the outer side of the locking support and is fixedly connected with the rod body of the pressing member through threaded connection or the like. Further, two positioning protrusions 4.4.1 are arranged on the side end surface of the handle close to the locking support with an angle of 180°. Two groups of positioning grooves are arranged on the outer end of the locking support. The two groups of positioning grooves are arranged at an angle of 90°. Each group of positioning grooves is composed of two grooves arranged at an angle of 180°. One group of the positioning grooves is a shallow groove 4.3.2. The other group of the positioning grooves is a deep groove 4.3.1.

[0029] When working, the pressing member presses the side vertical surface of the ball seat through the pressing head to make the circular side surface of the ball seat close to the surface of the ball seat mounting hole to realize the pressing and fixing of the ball seat. At this time, the two positioning protrusions are embedded in one group of deep grooves. When the ball seat after grinding needs to be taken out, the handle is pulled out of the deep groove to the right and then is turned by 90° to make the two positioning protrusions embedded in the shallow grooves. The spring is compressed to make the pressing head of the pressing member separated from the side vertical surface of the ball seat to conveniently realize the taking out of the ball seat. When the ball seat to be ground is put in again, the handle is pulled to the right to turn back to the original 0° position. The elastic force of the first compression spring is released. The pressing member moves inward to realize the pressing of the ball seat through the pressing head.

[0030] As Figure 8 , Figure 9As shown, the follow-up compression structure mainly comprises an operating lever 5.1, a rack 5.2, a gear 5.3, a bearing seat 5.13, a ball bearing 5.15, a gear seat 5.4, a connecting seat 5.5, a guide 5.6, an upper support 5.7, a second compression spring 5.8, a lower support 5.9, a support shaft 5.10, a guide sleeve 5.11, and a positioning pin 5.12.

[0031] The upper support, the second compression spring, the lower support, the support shaft, the guide sleeve, and the positioning pin constitute an elastic follow-up guide structure. The lower end of the support shaft is fixedly connected with the upper end of the positioning support of the positioning compression structure on the other side of the ball seat mounting hole, and the middle of the upper end of the support shaft is provided with a slot for giving way. The upper support and the lower support adopt a cylindrical structure, and the two supports are movably inserted and fitted, thereby protecting the second compression spring. The second compression spring is press-fitted in the upper support and the lower support, and the three components constitute a spring energy storage assembly, which is designed to be in a spring pre-compression state. The spring energy storage assembly is in penetrating fit with the support shaft. The guide sleeve is rotatably sleeved on the support shaft and located below the spring energy storage assembly. Two pin holes are formed in the outer side of the support shaft of the guide sleeve, and two positioning pins are vertically installed in the two pin holes, respectively. The two positioning pins are used for being inserted and fitted with two set pin holes on the ball gland, thereby positioning the ball gland.

[0032] The operating lever, the rack, the gear, the bearing seat, the ball bearing, the gear seat, the connecting seat, and the guide constitute a gear and rack assembly, which is used for maintaining and adjusting the spring energy storage of the elastic follow-up guide structure, and is also called a spring energy storage maintaining and adjusting mechanism. The guide is press-fitted above the upper support and adopts a disc structure. Two through holes are formed in the guide, and the upper end of the support shaft is extended from the two sides of the slot for giving way. The connecting seat is arranged above the guide. The lower part of the connecting seat is clampedly and fixedly connected with the upper end of the support shaft. A rack guide groove is formed in the connecting seat in the up-down direction. The rack is arranged in the rack guide groove, and the lower end of the rack is in press contact with the upper end of the guide. The gear seat is fixed to the connecting seat. The gear is fixed to the gear shaft 5.14. The gear shaft is rotatably supported on the gear seat through the ball bearing and the bearing seat, so that the gear is engaged with the rack. The operating lever is fixedly connected with one end of the gear shaft, so that the gear can be conveniently rotated. An external braking device, such as an electromagnetic brake or a mechanical brake, is arranged on the other end of the gear shaft. When self-locking is needed, the braking device works to limit the rotation of the gear, so that the rack is also kept stationary.

[0033] The aforementioned follow-up clamping structure uses two locating pins to position the ball caps. During grinding, as the grinding material is removed, the position of the ball caps is adjusted by the rotation of the guide sleeve around the support shaft and the slight downward movement of the guide sleeve. This follow-up clamping structure changes the force of the second compression spring by altering the stroke of the rack. Specifically, rotating the operating lever drives the gear to rotate, and the meshing of the gear teeth causes the rack to move up and down along the guide groove of the gear seat. The change in stroke, through the guide component, compresses or releases the force of the second compression spring.

[0034] like Figure 10 , Figure 11 As shown, the base structure is a cuboid with a 90° V-groove at the top center, formed by inclined surfaces A6.1 and B6.2. Rectangular through holes are located on both sides of the bottom line of the 90° V-groove for discharging grinding fluid. Inclined surface A is flush with the left side of the positioning support, and inclined surface B is flush with the bottom surface of the positioning support. Threaded holes A6.3 and B6.4 are vertically arranged on the side walls of inclined surface B. Threaded holes A and B are used to position and press the positioning support components; either threaded hole A or threaded hole B is used depending on the actual working requirements.

[0035] Method of using the combined special device for positioning and clamping ball hinges according to the present invention:

[0036] First, assemble and debug the ball hinge positioning and clamping assembly device. During the grinding process, install the various parts of the ball hinge to achieve the function of the designed assembly device. The specific usage method is as follows:

[0037] 1. Rotate the operating lever to the bottom, with the rack facing upwards, and rotate the guide sleeve component 90° counterclockwise or clockwise to ensure that the positioning support has unobstructed space, facilitating subsequent process operations.

[0038] 2. Pull the handle to the right and rotate it 90°. The handle will move the clamping part to the right. The positioning protrusion on the handle will engage with the shallow groove on the locking support to limit the clamping part. Place the ball seat into the ball seat mounting hole of the positioning support. Pull the handle to the right and rotate it back to the original 0° position. The elastic force of the first compression spring will be released, and the clamping part will press the ball seat.

[0039] 3. Install the ball journal and ball cap, rotate the guide sleeve back to the top of the ball cap, insert the locating pin into the pin hole of the ball cap, operate the operating lever to the top, the rack presses down to tighten the guide, the guide compresses the second compression spring downward, realizing the follow-up clamping force of the ball cap, connect the shaft of the ball journal to the spindle of the grinding machine, start the grinding machine, and perform ball joint grinding.

[0040] Although the embodiments of the present application and the drawings disclose the present application for illustrative purposes, those skilled in the art can understand that various substitutions, changes and modifications are possible without departing from the spirit and scope of the present application and the appended claims, and therefore the scope of the present application is not limited to the disclosed embodiments and drawings.

Claims

1. A combination special device for ball joint positioning and compression, characterized by: The base, the positioning and pressing structure and the follow-up pressing structure are included. The positioning and pressing structure includes a positioning support and a lateral elastic pressing assembly; the upper end of the positioning support is provided with a ball seat mounting hole, the bottom surface of the ball seat mounting hole forms a support surface; a grinding liquid discharge groove is arranged in communication with the lower part of the ball seat mounting hole on the positioning support; the lateral elastic pressing assembly is installed on the positioning support outside one side of the ball seat mounting hole in a direction parallel to the support surface, and presses the outer side surface of the ball seat arranged in the ball seat mounting hole through a pressing head, so as to realize positioning and pressing of the ball seat. The follow-up pressing structure includes an elastic follow-up guide structure and an elastic force energy storage and adjustment mechanism acting on the elastic follow-up guide structure; the elastic follow-up guide structure includes an upper support, a second compression spring, a lower support, a support shaft, a guide sleeve and a positioning pin; the lower end of the support shaft is fixedly connected with the upper end of the positioning support of the positioning and pressing structure on the other side of the ball seat mounting hole, the upper support and the lower support adopt a cylindrical structure, and the upper and lower supports are movably inserted and assembled; the second compression spring is press-fitted in the upper support and the lower support, and the three components form an elastic force energy storage assembly; the elastic force energy storage assembly is inserted and assembled with the support shaft; the guide sleeve is rotatably sleeved on the support shaft and located below the elastic force energy storage assembly; two pin holes are arranged on the outer side of the support shaft on the guide sleeve, and two positioning pins are vertically arranged in the two pin holes, respectively; the two positioning pins are used for being inserted and assembled with two set pin holes on the ball gland, so as to realize positioning of the ball gland; the elastic force energy storage and adjustment mechanism is integrally installed on the upper end surface of the support shaft, and forms a pressing contact with the upper end of the upper support through a terminal actuator with adjustable position. The base is a rectangular structure, a 90° V-shaped groove is arranged in the middle upper part and is composed of a slope A and a slope B, rectangular through holes are arranged on both sides of the bottom line of the 90° V-shaped groove and are used for discharging grinding liquid; the slope A is closely arranged on the left side of the positioning support, and the slope B is closely arranged on the bottom surface of the positioning support; threaded holes A and threaded holes B are vertically arranged on the side walls on both sides of the slope B, and a positioning and pressing structure and a follow-up pressing structure are fixed on the base in a vertical upward manner of a ball hinge ball shaft neck rod body through installation of fixing screws. The lateral elastic compression assembly comprises a compression piece, a locking support, a first compression spring and a handle; a compression piece accommodating groove is arranged on one side of the positioning support seat in communication with the ball seat mounting hole, and a guide through hole is arranged on the outer side of the compression piece accommodating groove; the compression piece is a rod-shaped compression piece with a compression head arranged at the inner end; the locking support is a sleeved support with a flange arranged at one end, and a spring limiting surface is arranged at the end of the locking support away from the flange; the locking support is fixedly installed on the outer side of the positioning support seat through the flange, and the inner hole of the locking support is coaxially arranged with the guide through hole on the positioning support seat; the compression piece is sequentially and inwardly outwardly arranged in the guide through hole on the positioning support seat and the inner hole on the locking support with the compression head inward, and the compression piece extends out of the outer end of the locking support, and a spring limiting surface is arranged on the end of the rod body of the compression piece close to the compression head; the first compression spring is sleeved on the rod body of the compression piece, and the two ends of the first compression spring are pressed on the spring limiting surfaces on the compression piece and in the inner hole of the locking support respectively; the handle is arranged on the outer side of the locking support and is fixedly connected with the outer end of the rod body of the locking support. The elastic energy storage retaining and adjusting mechanism comprises an operating rod, a rack, a gear, a gear seat, a connecting seat and a guide piece; the guide piece constitutes the end effector, the guide piece is press-fitted above the upper support seat and adopts a disc-shaped structure, two through holes are arranged on the guide piece for the upper end of the support shaft to extend out from the two side parts of the clearance slot arranged thereon; the connecting seat is arranged above the guide piece, the lower part of the connecting seat is clamped and fixedly connected with the upper end of the support shaft; a rack guide groove is arranged on the connecting seat in the upward and downward direction, the rack is arranged in the rack guide groove, and the lower end of the rack is in press contact with the upper end of the guide piece; the gear seat is fixed on the connecting seat, the gear is fixed on the gear shaft, the two ends of the gear shaft are rotatably supported on the gear seat through the ball bearing and the bearing seat, so that the gear is engaged with the rack; the operating rod is fixedly connected to one end of the gear shaft, and an external braking device is arranged on the other end of the gear shaft.

2. The combination special device for ball hinge positioning and pressing according to claim 1, characterized in that: Two positioning protrusions with an angle of 180° are arranged on the side end face of the handle close to the locking support, two groups of positioning grooves are arranged on the outer end of the locking support, the two groups of positioning grooves are arranged at an angle of 90°, each group of positioning grooves is composed of two grooves arranged at an angle of 180°, one group of the positioning grooves is a shallow groove, and the other group of the positioning grooves is a deep groove; in the matching state of the two positioning protrusions and one group of the deep grooves, the compression piece is in press contact with the side face of the ball seat through the compression head; in the matching state of the two positioning protrusions and one group of the shallow grooves, the compression head of the compression piece is out of contact with the side face of the ball seat.

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