阅读说明：本技术 一种钢球式转向中间轴用装配设备及装配方法 (Steel ball type steering intermediate shaft assembling equipment and assembling method ) 是由 刘文凯 黄智勇 邹文红 蒋京林 吕哓君 于 2020-05-20 设计创作，主要内容包括：一种钢球式转向中间轴用装配设备及装配方法,在装配框架顶部设置有高度调整用伺服电机组件,框体一侧设置有可升降的节叉夹紧机构安装框体,框体设置有固定节叉夹紧机构组件,通过该机构组件将待装配的钢球式转向中间轴的节叉部位夹紧；施加扭矩用电机的下部与固定节叉夹紧机构组件的中心位置连接,通过该施加扭矩用电机对被固定节叉夹紧机构组件夹持的待装配的钢球式转向中间轴施加扭矩；节叉夹紧机构安装框体的下部设置有一角间隙测试机构组件,通过该角间隙测试机构组件夹持待装配的钢球式转向中间轴并选择适配的钢球对中间轴进行装配。本发明有效且精确地测试轴与管之间的角间隙,选择最佳匹配的钢球来满足各种钢球式中间轴总成的装配需求。(A servo motor assembly for height adjustment is arranged at the top of an assembly frame, a liftable joint fork clamping mechanism installation frame is arranged on one side of the frame, a fixed joint fork clamping mechanism assembly is arranged on the frame, and a joint fork part of a steel ball type steering intermediate shaft to be assembled is clamped through the mechanism assembly; the lower part of the torque applying motor is connected with the center of the fixed joint fork clamping mechanism assembly, and the torque applying motor applies torque to the steel ball type steering intermediate shaft to be assembled, which is clamped by the fixed joint fork clamping mechanism assembly; an angle clearance testing mechanism assembly is arranged at the lower part of the joint fork clamping mechanism mounting frame body, and the steel ball type steering intermediate shaft to be assembled is clamped by the angle clearance testing mechanism assembly and is selected to be assembled. The invention effectively and accurately tests the angular clearance between the shaft and the pipe, and selects the best matched steel ball to meet the assembly requirements of various steel ball type intermediate shaft assemblies.)

1. The utility model provides a steel ball formula turns to rigging equipment for jackshaft, includes assembly base (1), sets up fixed floor (3) that be vertical assembly frame (2) and fixed assembly frame on assembly base and use, its characterized in that:

the top of the assembly frame (2) is provided with a servo motor component (4) for height adjustment;

the assembling frame (2) is provided with a lifting yoke clamping mechanism mounting frame body (5) at one side of the frame body,

the pitch fork clamping mechanism mounting frame body (5) is formed by mutually and vertically combining a mounting bedplate (5a) arranged in a horizontal plane and a vertical mounting plate (5b) arranged vertically, reinforcing rib plates (5c) connected with the mounting bedplate are further arranged on two sides of the vertical mounting plate, and the vertical height of the pitch fork clamping mechanism mounting frame body is adjusted through a servo motor component (4) for height adjustment;

a fixed joint fork clamping mechanism component (A) is arranged in the middle of the mounting bedplate (5a), and a joint fork part of a steel ball type steering intermediate shaft (6) to be assembled is clamped through the fixed joint fork clamping mechanism component;

the mounting vertical plate (5b) is provided with a motor (7) for applying torque which is vertically arranged, the lower part of the motor for applying torque is connected with the central position of the fixed joint fork clamping mechanism component (A), and the motor for applying torque is used for applying torque to a steel ball type steering intermediate shaft (6) to be assembled and clamped by the fixed joint fork clamping mechanism component;

an angle clearance testing mechanism component (B) is arranged at the lower part of the mounting bedplate (5a), and the steel ball type steering intermediate shaft (6) to be assembled is clamped through the angle clearance testing mechanism component and is selected to be matched with a steel ball to assemble the intermediate shaft.

2. A fitting apparatus for a steel ball type steering intermediate shaft according to claim 1, the fixed yoke clamping mechanism component (A) comprises a clamping mechanism fixing support (A1), a circular clamping disc (A2), a clamping cylinder (A3), a driving arm (A4) and a clamping jaw (A5), wherein the round clamping disk is fixedly arranged at the middle position of the mounting bedplate (5a) through a clamping mechanism fixing bracket, the center of the circular clamping disk is over against and connected with the lower part of a motor (5) for applying torque, a clamping cylinder is arranged at one side of the circular clamping disk and is connected with the circular clamping disk through a driving arm, the driving arm pushes/pulls the circular clamping disk to rotate clockwise or anticlockwise through the telescopic motion of the clamping cylinder so as to clamp or loosen the clamping jaw to be assembled to the fixed joint fork of the steel ball type steering intermediate shaft.

3. The assembling device for the steel ball type steering intermediate shaft according to claim 1, wherein the angular gap testing mechanism assembly (B) comprises a first push-pull cylinder (B1), a sliding shaft clamping cylinder (B2) provided with a floating mechanism, a sliding shaft clamping jaw (B3), a second push-pull cylinder (B4), a sliding tube clamping cylinder (B5), a sliding tube clamping jaw (B6) and a displacement sensor assembly (B7), wherein the first push-pull cylinder is horizontally arranged at the lower part of the mounting bedplate (5a), a push-pull working end of the first push-pull cylinder is connected with the sliding shaft clamping cylinder, the shaft clamping cylinder drives the sliding shaft clamping jaw connected with the first push-pull cylinder to clamp a sliding shaft body of the steel ball type steering intermediate shaft (6) to be assembled, the second push-pull cylinder is arranged at the lower part of the first push-pull cylinder, and a push-pull working end of the second push-pull cylinder is connected with the sliding tube clamping cylinder, the sliding pipe clamping cylinder drives a sliding pipe clamping jaw connected with the sliding pipe clamping cylinder to clamp a sliding pipe body of the steel ball type steering intermediate shaft to be assembled, and the displacement sensor assembly is fixedly arranged on the lower portion of one side of the sliding pipe clamping cylinder.

4. A ball type steering countershaft assembling apparatus as set forth in claim 3, wherein said displacement sensor module (B7) comprises a sensor barrier (B7a), a main displacement sensor (B7B) and an auxiliary displacement sensor (B7c), wherein the sensor barrier is connected to a lower portion of one side of the sliding shaft clamping cylinder (B2), and the main displacement sensor and the auxiliary displacement sensor are sequentially disposed on a sidewall of the sensor barrier from top to bottom.

5. A steel ball type steering intermediate shaft assembly method is based on the steel ball type steering intermediate shaft assembly equipment of any one of the preceding claims, and the steel ball type steering intermediate shaft assembly method comprises the following specific steps:

1) firstly, the vertical height of a joint fork clamping mechanism mounting frame body (5) is adjusted through a servo motor component (4) for height adjustment to enable the joint fork clamping mechanism mounting frame body to be adapted to an intermediate shaft needing to be assembled currently, then a steel ball type steering intermediate shaft (6) to be assembled is vertically arranged in a fixed joint fork clamping mechanism component (A) at the middle position of a mounting bedplate (5a), a fixed joint fork of the intermediate shaft is arranged at the central position of a circular clamping disc (A2), and a clamping cylinder (A3) pushes a driving arm (A4) to drive the circular clamping disc to rotate clockwise to clamp a clamping jaw (A5) on the fixed joint fork;

2) starting a first push-pull cylinder (B1) to extend a sliding shaft clamping cylinder (B2), and driving a sliding shaft clamping jaw (B3) connected with the shaft clamping cylinder to clamp a sliding shaft body of a steel ball type steering intermediate shaft (6) to be assembled to be clamped;

3) starting a second push-pull cylinder (B4) to extend a sliding tube clamping cylinder (B5), and driving a sliding tube clamping jaw (B6) connected with the sliding tube clamping cylinder to clamp a sliding tube body of the steel ball type steering intermediate shaft to be assembled;

4) confirming that a fixed joint fork, a sliding shaft and a sliding pipe are clamped, then starting a motor (7) for applying torque, applying torque to a clamped steel ball type steering intermediate shaft (6) to be assembled, wherein in the process, the sliding pipe generates a relative angle difference, at the moment, a sliding shaft clamping jaw (B3) drives a sliding shaft clamping cylinder (B2) provided with a floating mechanism to swing, and a sensor baffle plate (B7a) arranged at the lower part of one side of the sliding shaft clamping cylinder compresses or releases a main displacement sensor (B7B) and an auxiliary displacement sensor (B7 c);

5) in the step 4), the main displacement sensor (B7B) records the change of the displacement value, the auxiliary displacement sensor (B7c) also records the displacement value, the recorded displacement value is compared with the displacement value of the main displacement sensor, when the difference value of the two groups of displacement sensors is larger than a set range, the displacement detection is proved to have deviation, the maintenance is required, and if the difference value of the two groups of displacement sensors is in the set range, the state of the displacement detection mechanism is proved to be normal;

6) in step 5), the displacement value obtained by the main displacement sensor (B7B) is converted into an angle with the distance from the center of the displacement sensor to the center of the sliding tube body as a radius, the angle is an angular gap to be tested, and the method specifically comprises the following steps:

assuming that the compression amount of the displacement sensor is a when torque is applied in the positive and negative directions, the angular gap α between the shaft tubes at this time is 360a/(50 pi) °;

the correlation between the steel balls with different sizes and the angular gap and the sliding force is obtained through the parameter test, and the size of the steel ball required to be matched with the shaft tube is further obtained;

7) and 6) mounting the steel ball type intermediate shaft after the matched steel ball size is obtained, reversely loosening the cylinders and the clamping jaws at each position after the steel ball type intermediate shaft is mounted, taking out the assembled steel ball type steering intermediate shaft, and preparing for next operation.

6. The assembling method for the steel ball type steering intermediate shaft according to claim 5, wherein the set range of the difference value of the two sets of displacement sensors in the step 5) is 0-0.02 mm, and if the difference value exceeds 0.02mm, the steel ball type steering intermediate shaft is judged to need to be repaired.

Technical Field

The invention relates to the field of assembly of parts, in particular to an assembly device and an assembly method applied to a steel ball type steering intermediate shaft.

Background

At present, an intermediate shaft, one of parts of an automobile steering system, is used as a transmission connecting piece for connecting a steering column and a steering machine, the intermediate shaft transmits torque and rotating speed from the steering column to the steering machine, and the intermediate shaft has strong torsional rigidity and low running noise and has an easy telescopic function. Therefore, the research, development and manufacture belong to key core technologies of various large automobile part manufacturers.

With the continuous development of the automobile industry, the requirements of vehicles on an electric power steering system are gradually increased during the research and development of the vehicles, and the output torque provided by the system is continuously increased, so that higher requirements are provided for the bearable torque of an intermediate connecting component, namely an intermediate shaft, which is used for transmitting the torque.

According to the current research and analysis on the existing products on the market, the result shows that the spline type coating or injection molding coating in the prior art is difficult to meet the requirement of high torque, so the steel ball type intermediate shaft is firmly researched and developed at present, the intermediate shaft with the structure type has obvious advantages in the application of high torque, and the steel ball type structure on the current market has a plurality of differences, so the problems of overhigh processing cost, overhigh structure and increased assembly complexity, thereby reducing the efficiency of an assembly production line are caused.

In summary, there is a need for an assembly apparatus and a matching assembly method for the steel ball type intermediate shaft, which can meet the assembly requirements of steel ball type intermediate shaft assemblies with different angles and heights, and have wide applicability and high installation accuracy.

Disclosure of Invention

In order to solve various problems in the installation process of the steel ball type steering intermediate shaft in the prior art, the invention provides the steel ball type steering intermediate shaft assembling device and the assembling method.

The invention relates to an assembly device and an assembly method for a steel ball type steering intermediate shaft, wherein the device part and the method part are as follows:

the utility model provides a steel ball formula turns to rigging equipment for jackshaft, includes the assembly base, sets up the fixed floor that is vertical assembly frame and fixed assembly frame usefulness on the assembly base, its characterized in that:

the assembly frame is provided with a servo motor component for height adjustment at the top part;

the assembly frame is provided with a lifting yoke clamping mechanism mounting frame body at one side of the frame body,

the pitch fork clamping mechanism mounting frame body is formed by mutually and vertically combining a mounting bedplate arranged in a horizontal plane and a vertical mounting plate arranged vertically, reinforcing rib plates connected with the mounting bedplate are further arranged on two sides of the vertical mounting plate, and the vertical height of the pitch fork clamping mechanism mounting frame body is adjusted through a servo motor assembly for height adjustment;

a fixed joint fork clamping mechanism assembly is arranged at the middle position of the mounting bedplate, and a joint fork position of the steel ball type steering intermediate shaft to be assembled is clamped through the fixed joint fork clamping mechanism assembly;

the mounting vertical plate is provided with a motor for applying torque which is vertically arranged, the lower part of the motor for applying torque is connected with the central position of the fixed yoke clamping mechanism component, and the motor for applying torque is used for applying torque to the steel ball type steering intermediate shaft to be assembled, which is clamped by the fixed yoke clamping mechanism component;

an angle clearance testing mechanism assembly is arranged at the lower part of the mounting bedplate, and is used for clamping the steel ball type steering intermediate shaft to be assembled and selecting the adaptive steel ball to assemble the intermediate shaft.

The assembling device for the steel ball type steering intermediate shaft is characterized in that the fixed joint fork clamping mechanism assembly comprises a clamping mechanism fixing support, a circular clamping disc, a clamping cylinder, a driving arm and a clamping jaw, wherein the circular clamping disc is fixedly arranged at the middle position of the mounting bedplate through the clamping mechanism fixing support, the center of the circular clamping disc is over against the lower part of a motor for applying torque and is connected with the lower part of the motor, the clamping cylinder is arranged on one side of the circular clamping disc, the clamping cylinder is connected with the circular clamping disc through the driving arm, and the driving arm pushes/pulls the circular clamping disc to rotate clockwise or anticlockwise through the telescopic motion of the clamping cylinder so as to clamp or loosen the clamping jaw to the fixed joint fork of the steel ball type steering intermediate shaft to be assembled.

The assembling device for the steel ball type steering intermediate shaft is characterized in that the angular gap testing mechanism assembly comprises a first push-pull air cylinder, a sliding shaft clamping air cylinder provided with a floating mechanism, a sliding shaft clamping jaw, a second push-pull air cylinder, a sliding pipe clamping jaw and a displacement sensor assembly, wherein the first push-pull air cylinder is horizontally arranged at the lower part of the mounting bedplate, the push-pull working end of the first push-pull air cylinder is connected with the sliding shaft clamping air cylinder, the shaft clamping air cylinder drives the sliding shaft clamping jaw connected with the shaft clamping air cylinder to clamp a sliding shaft body of the steel ball type steering intermediate shaft to be assembled, the second push-pull air cylinder is arranged at the lower part of the first push-pull air cylinder, the push-pull working end of the second push-pull air cylinder is connected with the sliding pipe clamping air cylinder, the sliding pipe clamping air cylinder drives the sliding pipe clamping jaw connected with the sliding pipe clamping air cylinder to clamp the sliding pipe body of the steel ball type steering intermediate shaft to be assembled, and the displacement sensor assembly is fixedly arranged at the lower part of one side of the sliding shaft clamping cylinder.

The design aims to test the actual clearance of any group of shaft tubes by using the standard steel ball with small-grade size through the angular clearance testing mechanism assembly, and the steel ball to be matched is selected according to the clearance value in combination with theoretical data and early-stage test data, so that the intermediate shaft can meet the requirements of angular clearance and sliding force at the same time, and the qualification rate can be ensured.

The assembling device for the steel ball type steering intermediate shaft is characterized in that the displacement sensor assembly comprises a sensor baffle, a main displacement sensor and an auxiliary displacement sensor, wherein the sensor baffle is connected with the lower part of one side of the sliding shaft clamping cylinder, and the main displacement sensor and the auxiliary displacement sensor are sequentially arranged on one side plate wall of the sensor baffle from top to bottom.

The independently arranged displacement sensor assembly is a core component of the assembling equipment for the steel ball type steering intermediate shaft, the main displacement sensor and the auxiliary displacement sensor can accurately and effectively monitor displacement values, and the final test result cannot be influenced by the relative displacement between a non-shaft and a pipe.

An assembly method for a steel ball type steering intermediate shaft is based on the assembly equipment for the steel ball type steering intermediate shaft, and comprises the following specific steps:

1) firstly, adjusting the vertical height of a joint fork clamping mechanism mounting frame body through a servo motor component for height adjustment to enable the joint fork clamping mechanism mounting frame body to be adapted to a middle shaft needing to be assembled at present, vertically arranging a steel ball type steering middle shaft to be assembled in a fixed joint fork clamping mechanism component at the middle position of a mounting platen, arranging a fixed joint fork of the middle shaft in the center position of a circular clamping disk, and pushing a driving arm to drive the circular clamping disk to rotate clockwise through a clamping cylinder to clamp a clamping jaw to the fixed joint fork;

2) starting a first push-pull air cylinder to extend out a sliding shaft clamping air cylinder, and driving a sliding shaft clamping jaw connected with the shaft clamping air cylinder to clamp a sliding shaft body of a steel ball type steering intermediate shaft to be assembled to clamp the sliding shaft body;

3) starting a second push-pull cylinder to extend out a sliding pipe clamping cylinder, and driving a sliding pipe clamping jaw connected with the sliding pipe clamping cylinder to clamp a sliding pipe body of the steel ball type steering intermediate shaft to be assembled;

4) confirming that a fixed joint fork, a sliding shaft and a sliding pipe are clamped tightly, then starting a motor for applying torque, applying torque to a clamped steel ball type steering intermediate shaft to be assembled, wherein in the process, the sliding pipe generates a relative angle difference, at the moment, a sliding shaft clamping jaw drives a sliding shaft clamping cylinder provided with a floating mechanism to swing, and a sensor baffle plate arranged at the lower part of one side of the sliding shaft clamping cylinder tightly presses or loosens a main displacement sensor and an auxiliary displacement sensor;

5) in step 4), the main displacement sensor records the change of the displacement value, the auxiliary displacement sensor records the displacement value, the recorded displacement value is compared with the displacement value of the main displacement sensor, when the difference value of the two groups of displacement sensors is larger than a set range, the displacement detection is proved to have deviation, the maintenance is required, and if the difference value of the two groups of displacement sensors is within the set range, the state of the displacement detection mechanism is proved to be normal;

two sets of displacement sensors are arranged herein, wherein one set of primary displacement sensors is used for testing the angular gap, and the other set of secondary displacement sensors is used as secondary sensors for verifying the validity of the primary sensors.

6) In step 5), the displacement value obtained by the main displacement sensor is converted into an angle taking the distance from the center of the displacement sensor to the circle center of the sliding pipe body as a radius, the angle is an angular gap required to be tested, and the method specifically comprises the following steps:

assuming that the compression amount of the displacement sensor is a when torque is applied in the positive and negative directions, the angular gap α between the shaft tubes at this time is 360a/(50 pi) °;

the correlation between the steel balls with different sizes and the angular gap and the sliding force is obtained through the parameter test, and the size of the steel ball required to be matched with the shaft tube is further obtained;

7) and 6) mounting the steel ball type intermediate shaft after the matched steel ball size is obtained, reversely loosening the cylinders and the clamping jaws at each position after the steel ball type intermediate shaft is mounted, taking out the assembled steel ball type steering intermediate shaft, and preparing for next operation.

The assembling method for the steel ball type steering intermediate shaft is characterized in that the set range of the difference value of the two sets of displacement sensors in the step 5) is 0-0.02 mm, and if the difference value exceeds 0.02mm, the steel ball type steering intermediate shaft is judged to need to be overhauled.

The design here is intended to make the invention self-checking-when there is an anomaly in the angular gap testing mechanism assembly.

In summary, the conventional scheme of the prior art measures the dimensions of the sliding shaft and the ball grooves of the sliding tube and the angular relationship between the ball grooves, and then selects a proper steel ball according to the measurement correlation result. The assembling device and the assembling method for the steel ball type steering intermediate shaft directly test the angular gap of the shaft tube, and obtain the correlations between the steel balls with different sizes and the angular gap and the sliding force through tests, thereby obtaining the size of the steel ball required to be matched with the shaft tube.

The steel ball type steering intermediate shaft assembling device and the assembling method have the following beneficial effects that:

1. according to the assembling device and the assembling method for the steel ball type steering intermediate shaft, the higher rigidity requirement and the larger torque range can be realized through structural design calculation and experimental verification, so that the assembling requirements of steel ball type intermediate shaft assemblies with different angles and heights can be met;

2. according to the assembling device and the assembling method for the steel ball type steering intermediate shaft, the high-precision and high-stability structural design is adopted, so that the angle clearance between the shaft and the pipe can be effectively and accurately tested, and the influence of other interference factors on the test result is eliminated;

3. according to the assembling device and the assembling method for the steel ball type steering intermediate shaft, the best matching steel ball can be selected through early-stage test data and matching logic, so that the cost and complexity of measurement during part assembling are saved, the best matching of the sliding pair position is realized, the extremely high flexible design is realized, and a larger product design range can be met;

4. the assembling device and the assembling method for the steel ball type steering intermediate shaft have a self-checking function, and self-checking can be carried out when the angular clearance testing mechanism assembly is abnormal.

Drawings

FIG. 1 is a detailed structural schematic diagram of a device part of the assembling device and the assembling method for the steel ball type steering intermediate shaft;

FIG. 2 is a schematic structural diagram of a fixed joint fork clamping mechanism assembly of the device part of the assembling equipment and the assembling method for the steel ball type steering intermediate shaft;

fig. 3a is a specific structural schematic diagram of an angular clearance testing mechanism assembly of the device part of the assembling equipment and the assembling method for the steel ball type steering intermediate shaft, which are disclosed by the invention;

fig. 3b is a concrete structural diagram of an angular clearance testing mechanism assembly of the device part of the assembling equipment and the assembling method for the steel ball type steering intermediate shaft in the other direction;

fig. 4 is a schematic diagram showing the correlation between the size of the steel ball and the angular clearance and the sliding force of the assembling device and the assembling method for the steel ball type steering intermediate shaft.

In the figure: 1-an assembly base, 2-an assembly frame, 3-a fixed ribbed plate, 4-a servo motor component for height adjustment, 5-a yoke clamping mechanism installation frame body, 5 a-an installation bedplate, 5B-an installation vertical plate, 5 c-a reinforcing rib plate, 6-a steel ball type steering intermediate shaft to be assembled, 7-a motor for applying torque, an A-a fixed yoke clamping mechanism component, A1-a clamping mechanism fixing support, A2-a circular clamping disc, A3-a clamping cylinder, A4-a driving arm, A5-a clamping jaw, a B-angle clearance testing mechanism component, B1-a first push-pull cylinder, B2-a sliding shaft clamping cylinder provided with a floating mechanism, B3-a sliding shaft clamping jaw, B4-a second push-pull cylinder and B5-a sliding pipe clamping cylinder, b6-sliding tube gripper, B7-displacement sensor assembly, B7 a-sensor barrier, B7B-primary displacement sensor, B7 c-secondary displacement sensor.

Detailed Description

The assembling device and the assembling method for the steel ball type steering intermediate shaft are further described by combining the attached drawings and the embodiment:

examples

As shown in fig. 1 to 3b, the steel ball type steering intermediate shaft assembling device comprises an assembling base 1, a vertical assembling frame 2 arranged on the assembling base, and a fixed ribbed slab 3 for fixing the assembling frame, wherein:

the assembly frame 2 is provided with a servo motor component 4 for height adjustment at the top thereof;

the assembly frame 2 is provided with a liftable joint fork clamping mechanism mounting frame body 5 at one side of the frame body,

the pitch fork clamping mechanism mounting frame body 5 is formed by mutually and vertically combining a mounting bedplate 5a arranged in a horizontal plane and a mounting vertical plate 5b arranged vertically, reinforcing rib plates 5c connected with the mounting bedplate are further arranged on two sides of the mounting vertical plate, and the vertical height of the pitch fork clamping mechanism mounting frame body is adjusted through a servo motor component 4 for height adjustment;

a fixed joint fork clamping mechanism component A is arranged at the middle position of the mounting bedplate 5a, and the joint fork position of the steel ball type steering intermediate shaft 6 to be assembled is clamped through the fixed joint fork clamping mechanism component;

a motor 7 for applying torque is vertically arranged on the mounting vertical plate 5b, the lower part of the motor for applying torque is connected with the central position of the fixed joint fork clamping mechanism component A, and the motor for applying torque is used for applying torque to a steel ball type steering intermediate shaft 6 to be assembled, which is clamped by the fixed joint fork clamping mechanism component;

an angular gap testing mechanism component B is arranged at the lower part of the mounting bedplate 5a, and the steel ball type steering intermediate shaft to be assembled is clamped through the angular gap testing mechanism component and the intermediate shaft is assembled by selecting the adaptive steel ball.

The fixed yoke clamping mechanism assembly A comprises a clamping mechanism fixing support A1, a circular clamping disk A2, a clamping cylinder A3, a driving arm A4 and a clamping jaw A5, wherein the circular clamping disk is fixedly arranged at the middle position of the installation bedplate 5a through the clamping mechanism fixing support, the center of the circular clamping disk is over against and connected with the lower part of the motor 5 for applying torque, the clamping cylinder is arranged on one side of the circular clamping disk, the clamping cylinder is connected with the circular clamping disk through the driving arm, and the driving arm is pushed/pulled through the telescopic motion of the clamping cylinder to rotate the circular clamping disk clockwise or anticlockwise to clamp or loosen the clamping jaw to a fixed yoke of a steel ball type steering intermediate shaft to be assembled.

The angular gap testing mechanism component B comprises a first push-pull air cylinder B1, a sliding shaft clamping air cylinder B2 provided with a floating mechanism, a sliding shaft clamping jaw B3, a second push-pull air cylinder B4, a sliding pipe clamping air cylinder B5, a sliding pipe clamping jaw B6 and a displacement sensor component B7, the first push-pull air cylinder is horizontally arranged at the lower part of the installation bedplate 5a, the push-pull working end of the first push-pull air cylinder is connected with the sliding shaft clamping air cylinder, the shaft clamping air cylinder drives the sliding shaft clamping jaw connected with the shaft clamping air cylinder to clamp the sliding shaft body of the steel ball type steering intermediate shaft 6 to be assembled, the second push-pull air cylinder is arranged at the lower part of the first push-pull air cylinder, the push-pull working end of the second push-pull air cylinder is connected with the sliding pipe clamping air cylinder, the sliding pipe clamping air cylinder drives the sliding pipe clamping jaw connected with the sliding pipe clamping air cylinder to clamp the sliding pipe body of the steel ball type steering intermediate shaft to be assembled, and the displacement sensor assembly is fixedly arranged at the lower part of one side of the sliding shaft clamping air cylinder.

The displacement sensor assembly B7 includes a sensor bezel B7a, a main displacement sensor B7B, and an auxiliary displacement sensor B7c, wherein the sensor bezel is connected to a lower portion of one side of the sliding shaft clamping cylinder B2, and the main displacement sensor and the auxiliary displacement sensor are sequentially disposed from top to bottom on a side panel wall of the sensor bezel.

An assembly method for a steel ball type steering intermediate shaft is based on the assembly equipment for the steel ball type steering intermediate shaft, and comprises the following specific steps:

1) firstly, the vertical height of a joint fork clamping mechanism mounting frame body 5 is adjusted through a servo motor component 4 for height adjustment so as to be adapted to a middle shaft needing to be assembled at present, then a steel ball type steering middle shaft 6 to be assembled is vertically arranged in a fixed joint fork clamping mechanism component A at the middle position of a mounting bedplate 5a, a fixed joint fork of the middle shaft is arranged at the central position of a circular clamping disc A2, and a clamping cylinder A3 pushes a driving arm A4 to drive the circular clamping disc to rotate clockwise so as to clamp the fixed joint fork by a clamping jaw A5;

2) starting a first push-pull cylinder B1 to extend a sliding shaft clamping cylinder B2, and driving a sliding shaft clamping jaw B3 connected with the shaft clamping cylinder to clamp a sliding shaft body of the steel ball type steering intermediate shaft 6 to be assembled to clamp the sliding shaft body;

3) starting a second push-pull cylinder B4 to extend a sliding tube clamping cylinder B5, and driving a sliding tube clamping jaw B6 connected with the sliding tube clamping cylinder to clamp a sliding tube body of the steel ball type steering intermediate shaft to be assembled;

4) confirming that a fixed joint fork, a sliding shaft and a sliding pipe are clamped, starting a motor 7 for applying torque, applying torque to a clamped steel ball type steering intermediate shaft 6 to be assembled, wherein in the process, the sliding pipe generates a relative angle difference, at the moment, a sliding shaft clamping jaw B3 drives a sliding shaft clamping cylinder B2 provided with a floating mechanism to swing, and a sensor baffle B7a arranged at the lower part of one side of the sliding shaft clamping cylinder compresses or releases a main displacement sensor B7B and an auxiliary displacement sensor B7 c;

5) in step 4), the main displacement sensor B7B records the change of the displacement value, the auxiliary displacement sensor B7c also records the displacement value, and compares the recorded displacement value with the displacement value of the main displacement sensor, when the difference between the two sets of displacement sensors is greater than the set range, it is proved that the displacement detection has deviation, and the maintenance is required, and if the difference between the two sets of displacement sensors is within the set range, it is proved that the displacement detection mechanism is normal;

6) in step 5), the displacement value obtained by the main displacement sensor B7B is converted into an angle with the distance from the center of the displacement sensor to the center of the sliding tube body (in this embodiment, the distance from the center of the displacement sensor to the center of the sliding tube body is 25mm) as a radius, and the angle is an angular gap to be measured, and specifically:

assuming that the compression amount of the displacement sensor is a when torque is applied in the positive and negative directions, the angular gap α between the shaft tubes at this time is 360a/(50 pi) °;

the correlation between the steel balls with different sizes and the angular gap and the sliding force is obtained through the parameter test, and the size of the steel ball required to be matched with the shaft tube is further obtained;

7) and 6) mounting the steel ball type intermediate shaft after the matched steel ball size is obtained, reversely loosening the cylinders and the clamping jaws at each position after the steel ball type intermediate shaft is mounted, taking out the assembled steel ball type steering intermediate shaft, and preparing for next operation.

And 5) setting the difference value of the two groups of displacement sensors in the step 5) within the range of 0-0.02 mm, and judging that the maintenance is required if the difference value exceeds 0.02 mm.

In the embodiment, the actual clearance of any group of shaft tubes is tested by using the standard steel ball with small gear size, and the steel ball to be matched is selected according to the clearance value in combination with theoretical data and early-stage test data, so that the intermediate shaft can meet the requirements of angular clearance and sliding force at the same time, and the qualification rate can be ensured. As shown in FIG. 4, the correlation of the size of the steel ball with the angular gap and the sliding force is obtained by testing the angular gap and the sliding force of the steel ball of 4.7625mm-20 mu to 4.7625mm (every 2 mu and one gear, 10 gears in total). When the production line is automatically produced, the matched axle tube is tested by using a steel ball with the diameter of 4.7625mm-20 mu, and the steel ball with the proper size is matched according to the actually measured gap value.

According to the assembling device and the assembling method for the steel ball type steering intermediate shaft, the higher rigidity requirement and the larger torque range can be realized through structural design calculation and experimental verification, so that the assembling requirements of steel ball type intermediate shaft assemblies with different angles and heights can be met; the invention has high-precision and high-stability structural design, so that the invention can effectively and accurately test the angular gap between the shaft and the tube, and eliminate the influence of other interference factors on the test result; the invention can select the steel ball which is best matched through early-stage test data and matching logic, saves the cost and complexity of measurement when parts are assembled, realizes the best matching of the sliding pair position, has extremely high flexible design, can meet a larger product design range, is designed with a self-checking function, and can perform self-checking when the angular gap testing mechanism assembly is abnormal.