Device and method suitable for closing-up, rolling loosening and gap detection of spherical hinge assembly

Abstract

The invention discloses a set of device and method suitable for closing-in, rolling loosening and gap detection of a spherical hinge assembly. The device comprises the spherical hinge assembly, a closing-in device, a rolling loosening device and a detection device. According to the invention, the processing efficiency of the spherical hinge assembly is improved, the time for closing, rolling and detecting is shortened, the problem that the processing qualified rate of the spherical hinge is low is solved, the processing quality of the spherical hinge is improved, the problem that the clearance of the ball head in the ball seat is difficult to measure is solved, the clearance detection is convenient and rapid, three-wheel automatic floating rolling and loosening are realized, and the labor intensity of workers is reduced.

Description

Technical Field

[0001] The invention belongs to the field of mechanical processing, and relates to a device and method suitable for closing, rolling loose and gap detection of a ball joint component. Background Art

[0002] The ball joint assembly adopts a spherical bearing structure, which has the advantages of flexible control, accuracy, and large torsion angle. Therefore, it is widely used in servo mechanism feedback potentiometers, playing a key role in stabilizing signal transmission and feedback. Figure 1 ) is composed of a ball joint head and a ball joint seat. The ball head of the ball joint head matches the ball socket of the ball joint seat. One end of the ball joint head is a ball head and the other end is an external thread. One end of the ball joint seat is a ball socket (a cylindrical and spherical combined cavity) and the other end is an external hexagon. In order to ensure correct signal transmission, the ball joint assembly needs to meet the following requirements after processing: ① After closing, the ball joint head should rotate flexibly without jamming ② The clearance of the ball head in the ball seat is ≤0.025mm ③ Apply an axial force of 50N for 1min to check whether the closing quality is intact.

[0003] The existing patent for a miniature plunger closing device (patent number: CN216679721U) has a closing mold divided into two halves, and the force-bearing part is located at one end of the plunger seat. There is no guide part, and the plunger seat and the mold are coordinated for orientation. When pressure is applied, position deviation is likely to occur, resulting in poor closing consistency. A plunger assembly plunger end closing method (patent number: CN109201813B) has a double-conical closing ring with a conical closing part instead of a spherical socket. In this way, after the plunger is closed, the outer wall of the sliding shoe is deformed into a cone instead of a sphere, and the corresponding deformation of the inner wall of the sliding shoe is also not a spherical shape that fits the plunger tightly, resulting in a poor closing effect and easy to cause the plunger to get stuck during rotation. A plunger assembly loosening tool (patent number: CN202317642U) is a single-wheel loosening device, which still requires manual feeding and cannot achieve floating loosening.

[0004] In order to meet the processing requirements, it is necessary to design a set of devices suitable for closing, rolling and gap detection of ball joint components to ensure the closing quality, improve the rolling efficiency and detection efficiency, and improve the product qualification rate. Summary of the invention

[0005] The technical problem solved by the present invention is: to overcome the deficiencies of the prior art, to provide a set of devices and methods suitable for ball joint assembly closing, rolling loose and clearance detection, thereby improving the product qualification rate.

[0006] The technical solution of the present invention is:

[0007] The present invention discloses a set of devices suitable for closing, rolling and gap detection of ball joint components, comprising: a ball joint component, a closing device, a rolling device and a detection device; wherein,

[0008] The ball joint assembly comprises a ball joint head and a ball joint seat. The ball joint head comprises an external threaded rod, a ball head and an external hexagon of the ball joint head. The ball head is located at the end of the external threaded rod. The external hexagon of the ball joint head is sleeved on the external threaded rod. The ball joint seat comprises an external hexagon of the ball joint seat and a cylinder. The external hexagon of the ball joint seat is sleeved on one end of the cylinder. A ball socket matching the ball head is arranged in the cylinder. One end of the ball socket is connected to the ball joint head.

[0009] The closing device comprises an outer cylinder, a shaft, a first guide column and a second pressing plate; wherein a through hole is provided inside the shaft; an inner hole is provided in the outer cylinder; the inner hole of the outer cylinder is connected to the small end of the shaft, the small end of the second pressing plate is connected to the through hole inside the shaft, and the lower end surface of the large end of the second pressing plate is fitted with the upper end surface of the large end of the shaft; an internal threaded hole is processed at one end of the first guide column for matching with the external threaded rod of the ball joint head, and one end of the first guide column is a conical structure and passes through the through hole in the shaft;

[0010] The rolling device comprises a three-jaw chuck, a clamping seat and a plurality of rolling assemblies; wherein the plurality of rolling assemblies are actuators during floating rolling; the clamping seat fixes the plurality of rolling assemblies on the three-jaw chuck; the centers of the plurality of rolling assemblies form a circle coaxial with the three-jaw chuck;

[0011] The detection device includes a base, a second guide column and a screw; wherein one end of the base is connected to the second guide column, and the other end is connected to the dial indicator through the screw; the second guide column is provided with an internal threaded hole that cooperates with the external threaded rod of the ball joint head; the external threaded rod of the ball joint head passes through the base and the second guide column is screwed to fix the ball joint assembly.

[0012] Furthermore, in the above-mentioned device, a wide groove is opened at one end of the base; a small through hole is provided at the other end of the base for inserting the straight rod of the dial indicator; a stepped square groove is provided on one side of the base for realizing the external hexagonal shape support of the ball joint seat and the ball joint head; a threaded hole is provided perpendicular to the upper end surface of the small through hole, which is connected to the small through hole, and a screw is screwed into the threaded hole for fixing the dial indicator; the second guide column is provided with an internal threaded hole that cooperates with the external threaded rod of the ball joint head; the external threaded rod of the ball joint head passes through the wide groove of the base, and the second guide column is screwed to realize the fixation of the ball joint assembly.

[0013] Furthermore, in the above-mentioned device, the loosening assembly includes a roller seat, a roller, a pin shaft and a clamping ring; wherein a clamping groove is set at one end of the roller seat, and the roller is installed in the clamping groove with the pin shaft as the axis, and is fixed by the pin shaft and the clamping ring; multiple rollers are the actuators during floating loosening; after the loosening assembly is assembled, the rollers can rotate; the centers of the multiple rollers form a circle coaxial with the three-jaw chuck.

[0014] Furthermore, in the above-mentioned device, a first hole is arranged at one end of the outer cylinder; a second hole and a third hole are arranged at the other end; wherein, the first hole is used to cooperate with the outer circle of one end of the shaft to play a directional role, ensuring that when pressure is applied, the pressure is vertically downward; the diameter of the second hole is larger than the outer circle diameter of the ball joint seat, and smaller than the outer circle diameter of the outer hexagon of the ball joint seat; the diameter of the third hole is larger than the outer circle diameter of the outer hexagon of the ball joint seat, and the depth of the third hole is set to ensure that after the ball joint seat is placed in the outer cylinder, the bottom surface of the outer cylinder contacts the workbench of the external press machine.

[0015] Furthermore, in the above-mentioned device, the shaft is a stepped shaft, the small end cooperates with the first hole of the outer cylinder, and the large end is used to withstand the pressure applied by the press. A through hole is provided in the shaft for accommodating the ball joint head and the first guide column, and a ball socket is provided at the lower end of the shaft for compressing the outer wall of the ball joint assembly to achieve closing.

[0016] Furthermore, in the above-mentioned device, the closing device also includes a first pressure plate and a second pressure plate; wherein, the first pressure plate and the second pressure plate are in the shape of a stepped shaft, and the small end of the first pressure plate is longer than the large end, and is used to confirm that the ball head of the ball joint head is aligned and contacted with the ball socket of the ball joint seat before the press applies pressure; the small end of the second pressure plate is shorter than the large end, and its small end is inserted into the through hole of the shaft during press assembly, and the press applies pressure to it to drive the shaft to move downward.

[0017] Furthermore, in the above device, when the loosening device is rolling, the axis of the ball joint assembly is always coaxial with the outer circle formed by the multiple rollers, and there is relative rotation between the ball joint assembly and the rollers to achieve floating loosening.

[0018] Furthermore, in the above device, the shaft and the outer cylinder of the closing device are clearance-fitted.

[0019] Furthermore, in the above-mentioned device, there are small annular grooves at both ends of the pin shaft, the pin shaft passes through the through holes on the roller seat and the roller, and the clamping rings are respectively inserted into the small annular grooves at both ends of the pin shaft to achieve fixation; the hexagon socket screw passes through the countersunk hole on the roller seat and is screwed into the threaded hole of the clamping seat to achieve the fixation of the rolling loosening assembly and the clamping seat.

[0020] The present invention discloses a method for detecting the closing, rolling loose and gap of a ball joint assembly, which adopts a set of devices for detecting the closing, rolling loose and gap of a ball joint assembly. The specific steps are as follows:

[0021] Assemble the small end of the shaft with the inner hole of the outer cylinder;

[0022] Screw the external threaded rod of the ball joint into the internal threaded hole of the first guide column;

[0023] Pass the assembled ball joint assembly and the first guide column through the third hole of the outer cylinder through the hole system formed by the outer cylinder and the shaft until the outer hexagon of the ball joint head contacts the end surface of the third hole of the outer cylinder;

[0024] Place the end face of the outer cylinder where the third hole is located on the workbench of the press machine, leaving a gap between the lower end face of the shaft and the upper end face of the outer cylinder;

[0025] Place the small end of the first pressing plate into the shaft through hole, and press the large end of the first pressing plate by hand to ensure that the ball joint head and the ball joint seat are in contact with each other;

[0026] Remove the first pressing plate, replace it with the second pressing plate, operate the press to press the large end of the second pressing plate, and the ball socket of the shaft squeezes the outer wall of the ball joint seat to achieve closing;

[0027] The three-jaw chuck is fixedly connected to the lathe spindle;

[0028] Adjust the three-jaw chuck to move the three rolling assemblies toward the center of the three-jaw chuck until they clamp the outer wall of the ball joint seat;

[0029] A floating chuck is installed in the direction of the lathe tailstock to clamp one end of the ball joint, and the floating chuck floats with the ball joint assembly;

[0030] Start the machine tool, and the roller and the ball joint assembly rotate relative to each other, so that the ball joint assembly can be loosened by floating;

[0031] Separate the second guide column from the ball joint assembly by a certain distance, clamp the external threaded rod of the ball joint head into the wide groove of the base, and make the external hexagonal end face of the ball joint head contact the inner end face of the wide groove;

[0032] The highest end of the stepped square groove of the base contacts the outer hexagon of the ball joint head, and the second highest end contacts the outer hexagon of the ball joint seat. The second guide column is screwed until it is close to the outer end surface of the wide groove of the base;

[0033] Pass the dial indicator rod through the small through hole on the base, press the dial indicator needle against the outer hexagonal end face of the ball joint seat, tighten the screws, and fix the dial indicator;

[0034] Drag the ball joint seat toward the dial indicator until the maximum gap between the ball joint head and the ball joint seat is reached, and observe the runout of the dial indicator. The runout is the maximum gap value.

[0035] The advantages of the present invention compared with the prior art are:

[0036] (1) The present invention improves the processing efficiency of ball joint assemblies, shortens the time for closing, loosening and testing, solves the problem of low ball joint processing qualification rate, improves the processing quality of ball joints, solves the problem of difficulty in measuring the clearance of the ball head in the ball seat, makes clearance detection convenient and quick, realizes 3-wheel automatic floating loosening, and reduces the labor intensity of workers.

[0037] (2) The device of the present invention shortens the time for closing, loosening and detecting the ball joint, thereby greatly improving the processing efficiency.

[0038] (3) The device of the present invention ensures the processing quality of the ball joint and greatly improves the qualified rate.

[0039] (4) The closing device of the present invention is relatively easy to use. One end of the shaft of the closing device is a ball socket (the theoretical shape of the outer wall of the ball joint seat after the inner wall of the ball joint seat fits the ball head of the ball joint head), which ensures a good closing effect and lays a good foundation for subsequent rolling loosening.

[0040] (5) The loosening device of the present invention is relatively easy to install and disassemble, and three sets of loosening assemblies can achieve floating loosening of the ball joint.

[0041] (6) The detection device of the present invention is easy to use and can accurately measure the clearance of the ball head in the ball seat.

[0042] (7) The device of the present invention can avoid the above two defects. No deviation will occur during closing. The inner wall of the ball joint seat is deformed and fits tightly to the ball joint head. The closing effect is good and the closing consistency is good.

[0043] (8) The device of the present invention can realize three-wheel floating rolling loosening, and manual clamping is sufficient without manual cutting, thereby improving efficiency and reducing labor intensity. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 A schematic diagram of a ball joint of the present invention;

[0045] Figure 2 It is a schematic diagram of the closing device of the present invention;

[0046] Figure 3 It is a cross-sectional view of the closing device of the present invention;

[0047] Figure 4 A schematic diagram of the rolling device of the present invention;

[0048] Figure 5 It is a schematic diagram of the detection device of the present invention;

[0049] Figure 6 It is a schematic diagram of the outer cylinder of the present invention;

[0050] Figure 7 It is a schematic diagram of the shaft of the present invention;

[0051] Figure 8 A schematic diagram of a guide column of the present invention;

[0052] Fig. 9 This is a schematic diagram of the first pressing plate of the present invention;

[0053] Fig.10 This is a schematic diagram of the second pressing plate of the present invention;

[0054] Fig.11 A schematic diagram of a rolling assembly of the present invention;

[0055] Fig.12 It is a schematic diagram of the card holder of the present invention;

[0056] Fig.13 A schematic diagram of a roller seat of the present invention;

[0057] Fig.14 It is a schematic diagram of the base of the present invention. DETAILED DESCRIPTION

[0058] The working principle and working process of the present invention will be further explained and illustrated below in conjunction with the accompanying drawings.

[0059] The present invention discloses a set of devices suitable for closing, rolling and gap detection of ball joint components, comprising: a ball joint component, a closing device, a rolling device and a detection device; wherein,

[0060] The ball joint assembly comprises a ball joint head 2 and a ball joint seat 1. The ball joint head 2 comprises an external threaded rod, a ball head and an external hexagonal ball joint head 4. The ball head is located at the end of the external threaded rod. The external hexagonal ball joint head 4 is sleeved on the external threaded rod. The ball joint seat 1 comprises an external hexagonal ball joint seat 3 and a cylinder. The external hexagonal ball joint seat 3 is sleeved on one end of the cylinder. A ball socket that matches the ball head is arranged in the cylinder. One end of the ball socket is connected to the ball joint head 2.

[0061] The closing device comprises an outer cylinder 11, a shaft 12, a first guide column 13 and a second pressing plate 15; wherein a through hole is provided inside the shaft 12; the outer cylinder 11 is provided with an inner hole; the inner hole of the outer cylinder 11 is connected to the small end of the shaft 12, the small end of the second pressing plate 15 is connected to the through hole inside the shaft 12, and the lower end surface of the large end of the second pressing plate 15 is fitted with the upper end surface of the large end of the shaft 12; one end of the first guide column 13 is processed with an internal threaded hole for matching with the external threaded rod of the ball joint head 2, and one end of the first guide column 13 is a conical structure, passing through the through hole in the shaft 12;

[0062] The rolling device comprises a three-jaw chuck 21, a clamping seat 22 and a plurality of rolling assemblies 20; wherein the plurality of rolling assemblies 20 are actuators during floating rolling; the clamping seat 22 fixes the plurality of rolling assemblies 20 on the three-jaw chuck 21; the centers of the plurality of rolling assemblies 20 form a circle coaxial with the three-jaw chuck 21;

[0063] The detection device includes a base 31, a second guide column 32 and a screw 33; wherein one end of the base 31 is connected to the second guide column 32, and the other end is connected to the dial indicator 34 through the screw 33; the second guide column 32 is provided with an internal threaded hole that cooperates with the external threaded rod of the ball joint head; the external threaded rod of the ball joint head passes through the base 31 and screws the second guide column 32 to fix the ball joint assembly.

[0064] Preferably, a wide groove is provided at one end of the base 31; a small through hole is provided at the other end of the base 31 for inserting the straight rod of the dial indicator 34; a stepped square groove is provided on one side of the base 31 for realizing the external support of the hexagonal ball joint seat 3 and the hexagonal ball joint head 4; a threaded hole is provided perpendicular to the upper end surface of the small through hole, which is connected to the small through hole, and a screw 33 is screwed into the threaded hole for fixing the dial indicator 34; the second guide column 32 is provided with an internal threaded hole that cooperates with the external threaded rod of the ball joint head; the external threaded rod of the ball joint head passes through the wide groove of the base 31, and the second guide column 32 is screwed to realize the fixation of the ball joint assembly.

[0065] Preferably, the loosening assembly 20 includes a roller seat 23, a roller 24, a pin 25 and a clamping ring 27; wherein a clamping groove is set at one end of the roller seat 23, and the roller 24 is installed in the clamping groove with the pin 25 as the axis, and is fixed by the pin 25 and the clamping ring 27; multiple rollers 24 are the actuators during floating loosening; after the loosening assembly is assembled, the rollers can rotate; the centers of the multiple rollers 24 form a circle coaxial with the three-jaw chuck 21.

[0066] Preferably, a first hole is set at one end of the outer cylinder 11; a second hole and a third hole are set at the other end; wherein, the first hole is used to cooperate with the outer circle of one end of the shaft 12 to play a directional role, ensuring that when pressure is applied, the pressure is vertically downward; the diameter of the second hole is larger than the outer diameter of the ball joint seat, and smaller than the outer diameter of the outer hexagon of the ball joint seat; the diameter of the third hole is larger than the outer diameter of the outer hexagon 3 of the ball joint seat, and the depth of the third hole is set to ensure that after the ball joint seat 1 is placed in the outer cylinder 11, the bottom surface of the outer cylinder 11 contacts the workbench of the external press machine.

[0067] Preferably, the shaft 12 is a stepped shaft, the small end of which cooperates with the first hole of the outer cylinder 11, and the large end is used to withstand the pressure applied by the press. A through hole is provided in the shaft 12 for accommodating the ball joint head and the first guide column 13, and a ball socket is provided at the lower end of the shaft 12 for compressing the outer wall of the ball joint assembly to achieve closing.

[0068] Preferably, the closing device also includes a first pressing plate 14 and a second pressing plate 15; wherein the first pressing plate 14 and the second pressing plate 15 are in the shape of stepped shafts, and the small end of the first pressing plate 14 is longer than the large end, and is used to confirm that the ball head of the ball joint head is aligned and in contact with the ball socket of the ball joint seat before the press machine applies pressure; the small end of the second pressing plate 15 is shorter than the large end, and its small end is inserted into the through hole of the shaft 12 during press assembly, and the press machine applies pressure to it to drive the shaft 12 to move downward.

[0069] Preferably, the closing device and the shape of the ball socket of the shaft 12 are inferred. When the inner wall of the ball joint seat is deformed to reach the ball diameter of the ball joint head, the approximate deformed shape of the outer wall of the ball joint seat is inferred to be the shape of the ball socket of the shaft 12.

[0070] Preferably, in the rolling loosening device, when rolling loose, the axis of the ball joint assembly is always coaxial with the outer circle formed by the multiple rollers 24, and there is relative rotation between the ball joint assembly and the rollers 24 to achieve floating rolling loosening.

[0071] Preferably, in the closing device, the shaft 12 and the outer cylinder 11 are clearance-fitted, and the internal through hole of the shaft 12 is of appropriate size, larger than the diameter of the outer hexagonal circumscribed circle of the ball joint, but not too large. The first guide column 13 tilts too much after passing through the ball joint, thereby affecting the closing quality.

[0072] Preferably, there are small annular grooves at both ends of the pin shaft 25, and the pin shaft 25 passes through the through holes on the roller seat 23 and the roller 24, and the clamping ring 27 is respectively inserted into the small annular grooves at both ends of the pin shaft 25 to achieve fixation; the hexagon socket screw passes through the countersunk hole on the roller seat 23 and is screwed into the threaded hole of the clamping seat 22 to achieve the fixation of the rolling assembly 20 and the clamping seat 22.

[0073] The present invention discloses a method for detecting the closing, rolling loose and gap of a ball joint assembly, which adopts a set of devices for detecting the closing, rolling loose and gap of a ball joint assembly. The specific steps are as follows:

[0074] Assemble the small end of the shaft 12 with the inner hole of the outer cylinder 11;

[0075] Screw the external threaded rod of the ball joint 2 into the internal threaded hole of the first guide column 13;

[0076] The assembled ball joint assembly and the first guide column 13 are passed through the third hole of the outer cylinder 11 through the hole system formed by the outer cylinder 11 and the shaft 12 until the outer hexagonal part 4 of the ball joint head contacts the end surface of the third hole of the outer cylinder 11;

[0077] Place the end face of the outer cylinder where the third hole is located on the workbench of the press machine, leaving a gap between the lower end face of the shaft 12 and the upper end face of the outer cylinder 11;

[0078] Place the small end of the first pressing plate into the through hole of the shaft 12, and press the large end of the first pressing plate by hand to ensure that the ball joint head is in contact with the ball joint seat;

[0079] Remove the first pressing plate, replace it with the second pressing plate, operate the press to press the large end of the second pressing plate, and the ball socket of the shaft squeezes the outer wall of the ball joint seat to achieve closing;

[0080] The three-jaw chuck 21 is fixedly connected to the lathe spindle;

[0081] Adjust the three-jaw chuck 21 to move the three rolling assemblies 20 toward the center of the three-jaw chuck 21 until they clamp the outer wall of the ball joint seat;

[0082] A floating chuck is installed in the direction of the lathe tailstock to clamp one end of the ball joint, and the floating chuck floats with the ball joint assembly;

[0083] Start the machine tool, and the roller 24 and the ball joint assembly rotate relative to each other, so that the ball joint assembly can be loosened by floating;

[0084] Separate the second guide column 32 from the ball joint assembly by a certain distance, clamp the external threaded rod of the ball joint head into the wide groove of the base 31, and make the external hexagonal end face of the ball joint head contact the inner end face of the wide groove;

[0085] The highest end of the stepped square groove of the base contacts the outer hexagonal side 4 of the ball joint head, and the second highest end contacts the outer hexagonal side 3 of the ball joint seat. The second guide column 32 is screwed until it is close to the outer end surface of the wide groove of the base.

[0086] Pass the dial indicator rod through the small through hole on the base, press the dial indicator needle against the outer hexagonal 3 end surface of the ball joint seat, tighten the screw 33, and fix the dial indicator;

[0087] Drag the ball joint seat toward the dial indicator until the maximum gap between the ball joint head and the ball joint seat is reached, and observe the runout of the dial indicator. The runout is the maximum gap value.

[0088] Example

[0089] like Figure 3 This is a cross-sectional view of the closing device. Assemble the small end of the shaft with the main hole of the outer cylinder, screw the outer thread of the ball joint into the inner thread hole of the guide column, and pass the assembled ball joint and guide column from the small end of the outer cylinder through the hole system composed of the outer cylinder and the shaft. Put the whole vertically flat (the end face where the small end hole of the outer cylinder is facing down) on the workbench of the press, insert the small end of the second pressure plate into the shaft through hole, operate the press to apply pressure to the large end of the second pressure plate, and the ball socket on the shaft squeezes the outer wall of the ball joint to achieve closing. (Principle: There is a ball socket at the small end of the shaft (such as Figure 7 ), the shape of the ball socket is similar to the outer wall shape of the ball joint seat after deformation (the origin of the shaft ball socket: when the inner wall of the ball joint seat is deformed and smoothly fits against the ball joint head, the approximate deformed shape of the outer wall of the ball joint seat is the shape of the shaft ball socket), the small end of the shaft cooperates with the main hole of the outer cylinder, and when the press applies pressure, the ball socket of the shaft decomposes the pressure applied by the press to the outer wall of the ball joint seat, causing the outer wall of the ball joint seat to deform, and when the outer wall of the ball joint seat is deformed and fits closely to the shaft ball socket, the inner wall of the ball joint seat also deforms and fits closely to the ball joint head to achieve closing).

[0090] like Figure 4 The following is a schematic diagram of the rolling device. The three-jaw chuck, the chuck seat (3 pieces), and the rolling assembly (3 pieces) are assembled to form the rolling device. The rolling device is installed on the lathe. The three-jaw chuck is screwed to make the rolling assembly move toward the center to clamp the outer wall of the ball joint. The machine tool is started to achieve floating rolling. (Principle: In order for the ball joint axis and the outer axis of the three rollers to be coaxial at all times, there will be relative movement between them. The relative movement between them is floating rolling)

[0091] like Figure 5This is a schematic diagram of the detection device. The detection device is relatively simple. After fixing the ball joint and the dial indicator, drag the ball joint seat to move. The amount of runout of the dial indicator during movement is the gap between the ball joint head and the ball joint seat.

[0092] The whole set of devices consists of 3 sets of small devices, which work together to achieve the closing, rolling and gap detection of the ball joint assembly. The components of the closing device include the outer cylinder, shaft, guide column, first pressure plate, and second pressure plate; the components of the rolling device include three-jaw chuck, chuck seat, roller seat, roller, pin shaft, hexagon socket screw, and clamp ring; the components of the detection device include base, guide column, hexagon socket screw; the schematic diagram of the ball joint closing device, rolling device, and detection device are shown in Figure 2 , Figure 4 , Figure 5 .

[0093] 2.1 Main structure of the device

[0094] 1) Closing device

[0095] The guide part consists of an outer cylinder ( Figure 6 ) and axis( Figure 7 )composition.

[0096] Guide column( Figure 8 ) One end of the joint has an internal thread hole for mating with the external thread of the ball joint.

[0097] The outer cylinder is processed with a stepped hole system. The first hole of Φ40 is used to match the outer circle of one end of the shaft and plays a directional role to ensure that when pressure is applied, the pressure is vertically downward. The second hole of Φ15.5 can ensure that the outer circle of the ball joint seat can pass through, but the outer hexagonal cannot pass through. The third hole of Φ18.5 can ensure that the outer hexagonal can pass through. The depth ensures that after the ball joint seat is placed in the outer cylinder, the bottom surface of the outer cylinder contacts the workbench of the press machine.

[0098] The shaft is a stepped shaft. The small end is used to cooperate with the Φ40 hole of the outer cylinder, and the large end is used to withstand the pressure applied by the press. There is a through hole inside the shaft to accommodate the ball joint head and guide column. There is a ball socket at the lower end of the shaft to compress the outer wall of the ball joint to achieve closing.

[0099] The first block ( Fig. 9 ) and the second pressing block ( Fig.10 ) is in the shape of a stepped shaft. The small end of the first pressing block is longer and is used to confirm that the ball head of the ball joint head is aligned and in contact with the ball socket of the ball joint seat before the press machine applies pressure. The small end of the second pressing block is shorter and is inserted into the shaft through hole during press assembly. The press machine applies pressure to it to drive the shaft downward.

[0100] 2) Loosening device

[0101] Roller seat( Fig.13 ), roller, pin and clamp ring each 3 to form a rolling assembly ( Fig.11 ).

[0102] The roller seat is a mounting base used to support rollers, pins, and clamps.

[0103] The roller is the actuator for floating loosening.

[0104] After the rolling assembly is assembled, the roller can rotate flexibly, and the edge of the roller forms a circle coaxial with the three-jaw chuck.

[0105] 3) Detection device

[0106] Base( Fig.14 ) A 6.5-wide groove is opened on one end to fix the position of the ball joint, and a stepped square groove is processed in the middle to support the ball joint and avoid the dial indicator rod. The highest end of the stepped groove contacts the outer hexagon of the ball joint head, and the second highest end contacts the outer hexagon of the ball joint seat. A small through hole is processed on the other end to allow the dial indicator rod to pass through. A small threaded hole is processed on the upper surface of the through hole to communicate with the through hole. A small screw is screwed into the threaded hole to play a role similar to a top screw, which is used to fix the dial indicator.

[0107] 2.2 Device connection method

[0108] Closing device: the main hole of the outer cylinder matches with the outer circle of the small end of the shaft, the internal thread hole of the guide column matches with the external thread rod of the ball joint, and they pass through the hole system composed of the outer cylinder and the shaft together, and the small end of the second pressing block is inserted into the shaft through hole.

[0109] Rolling loosening device: The holder and the three-jaw chuck are assembled through the slot, the roller seat countersunk hole is aligned with the holder threaded hole and connected with screws, the pin passes through the through holes on the roller seat and the roller, and the clamp ring is clamped into the annular groove of the pin. There are three holders, roller seat, roller, pin and clamp ring.

[0110] Detection device: The internal threaded hole of the guide column cooperates with the external threaded rod of the ball joint. The external threaded rod passes through the 6.5-wide slot on the base. The guide column is screwed to fix the ball joint. The stepped square groove in the middle is used to support the ball joint and avoid the dial indicator rod. The dial indicator rod passes through the small through hole at one end of the base. The small screw is screwed into the threaded hole on the end face of the base to play a role similar to a jackscrew and is used to fix the dial indicator.

[0111] 2.3 Implementation of the device

[0112] Assemble the small end of the shaft 12 with the inner hole of the outer cylinder 11;

[0113] Screw the external threaded rod of the ball joint 2 into the internal threaded hole of the first guide column 13;

[0114] The assembled ball joint assembly and the first guide column 13 are passed through the third hole of the outer cylinder 11 through the hole system formed by the outer cylinder 11 and the shaft 12 until the outer hexagonal part 4 of the ball joint head contacts the end surface of the third hole of the outer cylinder 11;

[0115] Place the end face of the outer cylinder where the third hole is located on the workbench of the press machine, leaving a gap between the lower end face of the shaft 12 and the upper end face of the outer cylinder 11;

[0116] Place the small end of the first pressing plate into the through hole of the shaft 12, and press the large end of the first pressing plate by hand to ensure that the ball joint head is in contact with the ball joint seat;

[0117] Remove the first pressing plate, replace it with the second pressing plate, operate the press to press the large end of the second pressing plate, and the ball socket of the shaft squeezes the outer wall of the ball joint seat to achieve closing;

[0118] The three-jaw chuck 21 is fixedly connected to the lathe spindle;

[0119] Adjust the three-jaw chuck 21 to move the three rolling assemblies 20 toward the center of the three-jaw chuck 21 until they clamp the outer wall of the ball joint seat;

[0120] A floating chuck is installed in the direction of the lathe tailstock to clamp one end of the ball joint, and the floating chuck floats with the ball joint assembly;

[0121] Start the machine tool, and the roller 24 and the ball joint assembly rotate relative to each other, so that the ball joint assembly can be loosened by floating;

[0122] Separate the second guide column 32 from the ball joint assembly by a certain distance, clamp the external threaded rod of the ball joint head into the wide groove of the base 31, and make the external hexagonal end face of the ball joint head contact the inner end face of the wide groove;

[0123] The highest end of the stepped square groove of the base contacts the outer hexagonal side 4 of the ball joint head, and the second highest end contacts the outer hexagonal side 3 of the ball joint seat. The second guide column 32 is screwed until it is close to the outer end surface of the wide groove of the base.

[0124] Pass the dial indicator rod through the small through hole on the base, press the dial indicator needle against the outer hexagonal 3 end surface of the ball joint seat, tighten the screw 33, and fix the dial indicator;

[0125] Drag the ball joint seat toward the dial indicator until the maximum gap between the ball joint head and the ball joint seat is reached, and observe the runout of the dial indicator. The runout is the maximum gap value.

[0126] The above embodiments are only explanations of the present invention and cannot be used as limitations of the present invention. Therefore, all implementation methods similar to the concept of the present invention or implementation methods used in other similar structures but with similar concepts to the present invention are within the protection scope of the present invention.

[0127] The above description is only the best specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

[0128] The contents not described in detail in the specification of the present invention belong to the common knowledge of the professionals in this field.

Claims

1. A device suitable for ball joint assembly closing, rolling loose and clearance detection, characterized in that: include: Ball joint assembly, closing device, rolling device and detection device; wherein, The ball joint assembly comprises a ball joint head (2) and a ball joint seat (1), wherein the ball joint head (2) comprises an externally threaded rod, a ball head and an external hexagonal ball joint head (4); the ball head is located at the end of the externally threaded rod; the external hexagonal ball joint head (4) is sleeved on the externally threaded rod; the ball joint seat (1) comprises an external hexagonal ball joint seat (3) and a cylinder, the external hexagonal ball joint seat (3) is sleeved on one end of the cylinder; a ball socket matching the ball head is provided in the cylinder; one end of the ball socket is connected to the ball joint head (2); The closing device comprises an outer cylinder (11), a shaft (12), a first guide column (13) and a second pressing plate (15); wherein a through hole is provided inside the shaft (12); the outer cylinder (11) is provided with an inner hole; the inner hole of the outer cylinder (11) is connected to the small end of the shaft (12), the small end of the second pressing plate (15) is connected to the through hole inside the shaft (12), and the lower end surface of the large end of the second pressing plate (15) is in contact with the upper end surface of the large end of the shaft (12); one end of the first guide column (13) is processed with an internal threaded hole for matching with the external threaded rod of the ball joint head (2), and one end of the first guide column (13) is a conical structure and passes through the through hole in the shaft (12); The rolling device comprises a three-jaw chuck (21), a clamping seat (22) and a plurality of rolling assemblies (20); wherein the plurality of rolling assemblies (20) are execution components for floating rolling of the ball joint assembly; the clamping seat (22) fixes the plurality of rolling assemblies (20) on the three-jaw chuck (21); the centers of the plurality of rolling assemblies (20) form a circle coaxial with the three-jaw chuck (21); The detection device comprises a base (31), a second guide column (32) and a screw (33); wherein one end of the base (31) is connected to the second guide column (32), and the other end is connected to a dial indicator (34) via the screw (33); the second guide column (32) is provided with an internal threaded hole that cooperates with the external threaded rod of the ball joint head (2); the external threaded rod of the ball joint head passes through the base (31), and the second guide column (32) is screwed to fix the ball joint assembly.

2. The device for detecting the closing, rolling and clearance of a ball joint assembly according to claim 1, characterized in that: A wide groove is formed at one end of the base (31); a small through hole is formed at the other end of the base (31) for inserting a straight rod of a dial indicator (34); a stepped square groove is formed on one side of the base (31) for supporting the outer hexagon of the ball joint seat (3) and the outer hexagon of the ball joint head (4); a threaded hole is formed perpendicular to the upper end surface of the small through hole and communicates with the small through hole, and a screw (33) is screwed into the threaded hole for fixing the dial indicator (34); a second guide column (32) is provided with an internal threaded hole that cooperates with the external threaded rod of the ball joint head; the external threaded rod of the ball joint head passes through the wide groove of the base (31), and the second guide column (32) is screwed to fix the ball joint assembly.

3. The device for detecting the closing, rolling and clearance of a ball joint assembly according to claim 1, characterized in that: The rolling loosening assembly (20) comprises a roller seat (23), a roller (24), a pin (25) and a clamping ring (27); wherein a clamping groove is arranged at one end of the roller seat (23), and the roller (24) is installed in the clamping groove with the pin (25) as an axis, and is fixed by the pin (25) and the clamping ring (27); the plurality of rollers (24) are actuators for floating rolling loosening; after the rolling loosening assembly is assembled, the rollers can rotate; the centers of the plurality of rollers (24) form a circle coaxial with the three-jaw chuck (21).

4. The device for detecting the closing, rolling and clearance of a ball joint assembly according to claim 1, characterized in that: A first hole is provided at one end of the outer cylinder (11); a second hole and a third hole are provided at the other end; wherein the first hole is used to cooperate with the outer circle of one end of the shaft (12) to play a directional role, ensuring that when pressure is applied, the pressure is vertically downward; the diameter of the second hole is larger than the outer circle diameter of the ball joint seat and smaller than the outer circle diameter of the outer hexagon of the ball joint seat; the diameter of the third hole is larger than the outer circle diameter of the outer hexagon of the ball joint seat (3), and the depth of the third hole is set to ensure that after the ball joint seat (1) is placed in the outer cylinder (11), the bottom surface of the outer cylinder (11) contacts the workbench of the external press machine.

5. The device for detecting the closing, rolling and clearance of a ball joint assembly according to claim 4, characterized in that: The shaft (12) is a stepped shaft, the small end of which cooperates with the first hole of the outer cylinder (11), and the large end of which is used to withstand the pressure applied by the press. A through hole is provided in the shaft (12) for accommodating the ball joint head and the first guide column (13), and a ball socket is provided at the lower end of the shaft (12) for compressing the outer wall of the ball joint assembly to achieve closing.

6. The device for detecting the closing, rolling and clearance of a ball joint assembly according to claim 1, characterized in that: The closing device also includes a first pressing plate (14) and a second pressing plate (15); wherein the first pressing plate (14) and the second pressing plate (15) are in the shape of stepped shafts, the small end of the first pressing plate (14) being longer than the large end, and being used to confirm that the ball head of the ball joint head is aligned and in contact with the ball socket of the ball joint seat before the press machine applies pressure; the small end of the second pressing plate (15) is shorter than the large end, and its small end is inserted into the through hole of the shaft (12) during press assembly, and the press machine applies pressure to it to drive the shaft (12) to move downward.

7. The device for detecting the closing, rolling and clearance of a ball joint assembly according to claim 3, characterized in that: When the loosening device is loosening, the axis of the ball joint assembly is always coaxial with the outer circle formed by the plurality of rollers (24), and there is relative rotation between the ball joint assembly and the rollers (24), thereby achieving floating loosening.

8. The device for detecting the closing, rolling and clearance of a ball joint assembly according to claim 1, characterized in that: The closing device has a shaft (12) and an outer cylinder (11) that are clearance-matched.

9. The device for detecting the closing, rolling and clearance of a ball joint assembly according to claim 3, characterized in that: The pin shaft (25) has small annular grooves at both ends. The pin shaft (25) passes through through holes on the roller seat (23) and the roller (24). The clamping rings (27) are respectively inserted into the small annular grooves at both ends of the pin shaft (25) to achieve fixation. The hexagon socket screw passes through the countersunk hole on the roller seat (23) and is screwed into the threaded hole of the clamping seat (22) to achieve fixation of the rolling assembly (20) and the clamping seat (22).

10. A method for detecting the closing, rolling looseness and clearance of a ball joint assembly, characterized in that: A device for detecting the closing, rolling and clearance of a ball joint assembly as described in any one of claims 1 to 9 is used, and the specific steps are as follows: Assemble the small end of the shaft (12) with the inner hole of the outer cylinder (11); Screwing the external threaded rod of the ball joint (2) into the internal threaded hole of the first guide column (13); The assembled ball joint assembly and the first guide column (13) are passed through the third hole of the outer cylinder (11) and the hole system formed by the outer cylinder (11) and the shaft (12) until the outer hexagonal part (4) of the ball joint head contacts the end surface of the third hole of the outer cylinder (11); The end face of the outer cylinder where the third hole is located is placed on the workbench of the press machine, with a gap left between the lower end face of the shaft (12) and the upper end face of the outer cylinder (11); Place the small end of the first pressing plate into the through hole of the shaft (12), and press the large end of the first pressing plate by hand to ensure that the ball joint head is in contact with the ball joint seat; Remove the first pressing plate, replace it with the second pressing plate, operate the press to press the large end of the second pressing plate, and the ball socket of the shaft squeezes the outer wall of the ball joint seat to achieve closing; The three-jaw chuck (21) is fixedly connected to the main shaft of the lathe; Adjust the three-jaw chuck (21) so that the three rolling assemblies (20) move toward the center of the three-jaw chuck (21) until they clamp the outer wall of the ball joint seat; A floating chuck is installed in the direction of the lathe tailstock to clamp one end of the ball joint, and the floating chuck floats with the ball joint assembly; The machine tool is started, and the roller (24) and the ball joint assembly rotate relative to each other, so that the ball joint assembly can be loosened by floating; The second guide column (32) is separated from the ball joint assembly by a certain distance, and the external threaded rod of the ball joint head is clamped into the wide groove of the base (31), and the end face of the external hexagonal (4) of the ball joint head is against the inner end face of the wide groove; The highest end of the stepped square groove of the base contacts the outer hexagon of the ball joint head (4), and the second highest end contacts the outer hexagon of the ball joint seat (3), and the second guide column (32) is screwed until it is close to the outer end surface of the wide groove of the base; Pass the dial indicator rod through the small through hole on the base, press the dial indicator needle against the end face of the outer hexagon of the ball joint seat (3), tighten the screw (33) to fix the dial indicator; Drag the ball joint seat toward the dial indicator until the maximum gap between the ball joint head and the ball joint seat is reached, and observe the runout of the dial indicator. The runout is the maximum gap value.

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