CN109590504B - Automatic centering and punching device for torque sensor assembly of automobile power-assisted steering system - Google Patents
Automatic centering and punching device for torque sensor assembly of automobile power-assisted steering system Download PDFInfo
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- CN109590504B CN109590504B CN201811436073.XA CN201811436073A CN109590504B CN 109590504 B CN109590504 B CN 109590504B CN 201811436073 A CN201811436073 A CN 201811436073A CN 109590504 B CN109590504 B CN 109590504B
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- torque sensor
- sensor assembly
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- positioning
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B41/00—Boring or drilling machines or devices specially adapted for particular work; Accessories specially adapted therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B47/00—Constructional features of components specially designed for boring or drilling machines; Accessories therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q15/00—Automatic control or regulation of feed movement, cutting velocity or position of tool or work
- B23Q15/20—Automatic control or regulation of feed movement, cutting velocity or position of tool or work before or after the tool acts upon the workpiece
- B23Q15/22—Control or regulation of position of tool or workpiece
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Power Steering Mechanism (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
The invention discloses an automatic centering and punching device for a torque sensor assembly of an automobile power-assisted steering system, which comprises the torque sensor assembly, a supporting plate and a centering mechanism, wherein the torque sensor assembly consists of a lower steering shaft, a worm gear shaft, a torsion bar, a sliding sleeve and a return spring which are coaxial; the centering mechanism comprises a bracket fixedly arranged on the supporting plate, and the bracket is sequentially connected with a coaxial encoder, a rotating motor, a first coupler, a torque sensor, a second coupler and a spline sleeve; the supporting and positioning mechanism comprises a first supporting block, a second supporting block and a positioning motor which are sequentially arranged along the axial direction of the spline sleeve; the clamping mechanism comprises a first electric clamping unit and a second electric clamping unit which are identical in size and structure. The automatic centering device can automatically adjust the centering, improve the punching efficiency and precision, improve the convenience of equipment and reduce the energy consumption.
Description
Technical Field
The invention relates to the technical field of assembly line processing equipment, in particular to an automatic centering and punching device for a torque sensor assembly of an automobile power-assisted steering system.
Background
The torque sensor assembly is a key component in an automobile electric power steering system, and in the production process of the automobile electric power steering system, the punching of a worm wheel shaft and a torsion bar of the torque sensor assembly is usually completed through a positioning mechanism and a punching mechanism.
Fig. 1 is a schematic structural diagram of a measured torque sensor assembly, and fig. 2 is a sectional view of the measured torque sensor assembly. The torque sensor assembly 100 is composed of a lower steering shaft 101, a worm gear shaft 102, a torsion bar 103, a sliding sleeve 104 and a return spring 105 which are coaxial, the lower steering shaft 101 and the worm gear shaft 102 are connected together through the torsion bar 103 and an internal limiting mechanism, before drilling, one end of the torsion bar 103 is pressed into a central hole of the lower steering shaft 101 in an interference mode through a cold extrusion spline, the other end of the torsion bar 103 is in sliding fit with the central hole of the worm gear shaft 102, the return spring 105 and the sliding sleeve 104 are sleeved on a spiral rolling groove 106 on the outer side of the worm gear shaft 102, balls are installed in the spiral rolling groove 106, when the worm gear shaft 102 and the lower steering shaft 101 rotate relatively, the sliding sleeve 104 moves along the spiral rolling groove 106 to generate axial displacement, and the limiting mechanism allows the angle of relative rotation between the lower.
The positioning mechanism is used for automatically searching the midpoint 0 degrees, after positioning is finished, holes are drilled at one ends of the worm gear shaft 102 and the torsion bar 103 through the drilling mechanism, and the worm gear shaft 102 is connected with the torsion bar 103 through a shaft pin 107.
The problem that the middle point can be conveniently and accurately found and drilled before drilling is urgently needed to be solved in the production process of the automobile electric power steering system.
The accuracy and the convenience of the positioning mechanism and the punching mechanism are related to the quality and the production efficiency of the torque sensor assembly, and the conventional drilling mode has low precision, low efficiency, poor equipment convenience and high energy consumption.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide the automatic centering and punching device for the torque sensor assembly of the automobile power-assisted steering system, which improves the punching efficiency and precision, improves the convenience of equipment and reduces the energy consumption.
The technical purpose of the invention is realized by the following technical scheme:
an automatic centering and punching device for a torque sensor assembly of an automobile power-assisted steering system comprises the torque sensor assembly, a supporting plate and a punching mechanism, wherein the torque sensor assembly consists of a lower steering shaft, a worm wheel shaft, a torsion bar, a sliding sleeve and a return spring which are coaxial;
the centering mechanism comprises a bracket fixedly arranged on the supporting plate, and the bracket is sequentially connected with a coaxial encoder, a rotating motor, a first coupler, a torque sensor, a second coupler and a spline sleeve;
the supporting and positioning mechanism comprises a first supporting block, a second supporting block and a positioning motor which are sequentially arranged along the axis direction of the spline housing, the first supporting block is fixedly arranged on the supporting plate, the second supporting block is connected with the positioning motor fixedly arranged on the supporting plate, a strip-shaped chute is further arranged on one side, close to the positioning motor, of the second supporting block, a sliding rail corresponding to the chute is fixedly arranged on the positioning motor, the torque sensor assembly is arranged on the first supporting block and the second supporting block, and the positioning motor is used for pushing the second supporting block and enabling the worm wheel shaft to be sleeved with the spline housing, so that the positioning of the torque sensor assembly is completed;
the clamping mechanism comprises a first electric clamping unit and a second electric clamping unit which are the same in size and structure, the first electric clamping unit is fixedly arranged on a supporting plate on one side of a first supporting block and used for clamping a worm wheel shaft of a torque sensor assembly on the supporting and positioning mechanism, and the second electric clamping unit is fixedly arranged on a supporting plate on one side of a second supporting block and used for clamping a steering lower shaft of the torque sensor assembly on the supporting and positioning mechanism;
the drilling mechanism comprises a support frame fixedly arranged on the supporting plate, and a drilling unit is fixedly arranged on the support frame;
the control mechanism comprises a control unit, and the control unit is respectively electrically connected with the positioning motor, the first electric clamping unit, the second electric clamping unit, the drilling unit, the torque sensor, the encoder and the touch screen.
The automatic centering and punching device for the torque sensor assembly of the automobile power-assisted steering system comprises a first electric clamping unit and a second electric clamping unit, wherein the first electric clamping unit and the second electric clamping unit respectively comprise a clamping plate, the middle part of the clamping plate is hinged to a supporting rod fixedly arranged on a supporting plate, a push rod motor is arranged below the supporting plate, and a push rod of the push rod motor penetrates through the supporting plate and is hinged to one end of the clamping plate.
The automatic centering and punching device for the torque sensor assembly of the automobile power-assisted steering system is characterized in that the rotating motor is a stepping motor.
The automatic centering and punching device for the torque sensor assembly of the automobile power-assisted steering system is characterized in that the positioning motor is a screw motor.
The automatic centering and punching device for the torque sensor assembly of the automobile power-assisted steering system is characterized in that V-shaped grooves are formed in the centers of the first supporting block and the second supporting block.
The automatic centering and punching device for the torque sensor assembly of the automobile power-assisted steering system is characterized in that the encoder is a rotary encoder.
The automatic centering and punching device for the torque sensor assembly of the automobile power-assisted steering system is characterized in that the control unit is ZK3U-32-10 AD.
The invention has the beneficial effects that: the utility model provides a perforating device in automatic accent of car power assisted steering system torque sensor assembly improves punching efficiency and precision, and the convenience of lifting means reduces the energy consumption and uses.
Meanwhile, signals of the torque sensor and the encoder are utilized, the centering and the positioning can be accurately realized through the control mechanism, the drilling machine set can automatically complete the drilling process, and the structure is compact and high in stability.
The invention is described in detail below with reference to the drawings and specific examples, but the invention is not limited thereto.
Drawings
FIG. 1 is a schematic diagram of a torque sensor;
FIG. 2 is a cross-sectional view of a torque sensor;
FIG. 3 is a schematic structural view of the present invention;
FIG. 4 is a schematic view of the clamping mechanism of the present invention;
fig. 5 is a block diagram of the control mechanism of the present invention.
Wherein, the reference numbers:
1. a support plate; 21. A support; 22. an encoder; 23. a rotating electric machine; 24. a first coupling; 25. a torque sensor; 26. a second coupling; 27. a spline housing; 31. a first support block; 32. a second support block; 321. a chute; 33. positioning a motor; 331. a slide rail; 4. a first electric clamp unit; 5. a second electric clamp unit; 61. a support frame; 62. a drilling unit; 7. a clamping plate; 8. a strut; 9. a push rod motor; 10. a push rod; 11. a control unit; 12. a touch screen;
100. a torque sensor assembly; 101. steering the lower shaft; 102. a worm gear shaft; 103. a torsion bar; 104. a sliding sleeve; 105. a return spring; 106. spirally rolling grooves; 107. a pin.
Detailed Description
The invention will be described in detail with reference to the following drawings, which are provided for illustration purposes and the like:
as shown in fig. 1-5, an automatic centering and punching device for a torque sensor assembly of an automobile power steering system comprises a torque sensor assembly 100, wherein the torque sensor assembly 100 is composed of a lower steering shaft 101, a worm gear shaft 102, a torsion bar 103, a sliding sleeve 104 and a return spring 105 which are coaxial, and further comprises a supporting plate 1, wherein a centering mechanism, a supporting and positioning mechanism, a clamping mechanism, a drilling mechanism and a control mechanism are arranged above the supporting plate 1;
the centering mechanism comprises a bracket 21 fixedly arranged on the supporting plate 1, and the bracket 21 is sequentially connected with a coaxial encoder 22, a rotating motor 23, a first coupler 24, a torque sensor 25, a second coupler 26 and a spline housing 27;
the first coupling 24 and the second coupling 26 in this embodiment are preferably both elastic couplings to reduce errors caused by different axes between the connectors;
the supporting and positioning mechanism comprises a first supporting block 31, a second supporting block 32 and a positioning motor 33 which are sequentially arranged along the axial direction of the spline housing 27, the first supporting block 31 is fixedly arranged on the supporting plate 1, a strip-shaped chute 321 is also arranged on one side of the second supporting block 32 close to the positioning motor 33, a sliding rail 331 corresponding to the chute 321 is fixedly arranged on the positioning motor 33, the torque sensor assembly 100 is arranged on the first supporting block 31 and the second supporting block 32, the positioning motor 33 is used for pushing the second supporting block 32 and enabling the worm wheel shaft 102 to be sleeved with the spline housing 27, and positioning of the torque sensor assembly 100 is completed,
and a limit switch corresponding to the second supporting block 32 is further arranged on the supporting plate 1 and used for limiting the displacement of the second supporting block 32, when the second supporting block 32 is pushed by the positioning motor 33 to enable the worm gear shaft 102 to be sleeved with the spline housing 27, the limit switch is contacted with the second supporting block 32, and the positioning motor 33 stops working.
The clamping mechanism comprises a first electric clamping unit 4 and a second electric clamping unit 5 which are the same in size and structure, the first electric clamping unit 4 is fixedly arranged on the supporting plate 1 on one side of the first supporting block 31 and used for clamping and supporting a worm wheel shaft 102 of the torque sensor assembly 100 on the positioning mechanism, and the second electric clamping unit 5 is fixedly arranged on the supporting plate 1 on one side of the second supporting block 32 and used for clamping and supporting a steering lower shaft 101 of the torque sensor assembly 100 on the positioning mechanism;
the drilling mechanism comprises a support frame 61 fixedly arranged on the supporting plate 1, and a drilling unit 62 is fixedly arranged on the support frame 61;
the control mechanism comprises a control unit 11, and the control unit 11 is respectively electrically connected with the positioning motor 33, the first electric clamping unit 4, the second electric clamping unit 5, the drilling unit 62, the torque sensor 25, the encoder 22 and the touch screen 12.
As shown in fig. 4, the first electric clamping unit 4 and the second electric clamping unit 5 in this embodiment have the same size and structure, the first electric clamping unit 4 and the second electric clamping unit 5 both include a clamping plate 7, the middle portion of the clamping plate 7 is hinged to a supporting rod 8 fixedly disposed on the supporting plate 1, a push rod motor 9 is disposed below the supporting plate 1, and a push rod 10 of the push rod motor 9 penetrates through the supporting plate 1 and is hinged to one end of the clamping plate 7. The push rod 10 is driven to move up and down by the push rod motor 9, so that one end of the clamping plate 7 is driven to move up and down, and the purpose of clamping the worm wheel shaft 102 or steering the lower shaft 101 is achieved. The magnitude of the clamping force is controlled by the number of PWM duty cycles of the control unit 11 and the feedback current of the push rod motor 9.
The rotating motor 23 in the embodiment is preferably a stepping motor, and the rotating step distance of the stepping motor meets the requirement of centering rotary displacement precision;
the positioning motor 33 is preferably a lead screw motor; the encoder 22 is preferably a rotary encoder; the control unit 11 is preferably ZK3U-32-10 AD.
In this embodiment, the first supporting block 31 and the second supporting block 32 are provided with a V-shaped groove (not shown) at the center, so as to stably place the torque sensor assembly 100.
The torque sensor 25 outputs an analog voltage signal, which can be directly collected and calculated through an AD port of the control unit 11. The position signal of the encoder 22 is sent to the I/O port of the control unit, and the exact rotation angle can be calculated according to the signal logic relationship and the number of pulses.
The centering mechanism can reduce the influence caused by different shafts by using the first coupling and the second coupling.
The touch screen 12 is communicated with the control unit 11 through RS485, various control signals can be sent to the control unit 11 through the touch screen 12, and meanwhile, the operation and control results of the control unit 11 can be displayed.
The working process of the invention is as follows:
firstly, a torque sensor assembly 100 to be punched is horizontally placed on a V-shaped groove of a first supporting block 31 and a V-shaped groove of a second supporting block 32, the torque sensor assembly 100 is coaxial with a spline housing 27 at the moment, a positioning motor 33 is started, the positioning motor 33 pushes the second supporting block 32 to move towards the spline housing, the second supporting block 32 pushes the side face of a worm gear shaft 102 of the torque sensor assembly 100 to abut against the side face of the first supporting block, a shaft rod of the worm gear shaft 102 is embedded into the spline housing 27, and the side face of the second supporting block 32 abuts against a shaft shoulder of a steering lower shaft 101, so that the supporting and positioning of the torque sensor assembly 100 are completed.
The second electric clamp unit 5 in the clamp mechanism is activated to clamp the steering lower shaft 101 of the torque sensor assembly 100 to the second support block 32.
When the steering lower shaft is clamped according to the preset clamping force, the centering mechanism is started, the rotating motor 23 drives the worm wheel shaft 102 to start rotating, after the forward limit is reached, the steering lower shaft 101 is clamped and fixed, the torque values of the worm wheel shaft 102 and the steering lower shaft 101 start increasing, and when the torque value reaches the set initial value, the angle of the encoder 22 is set to zero, namely theta = theta1When the worm wheel shaft 102 rotates in the reverse direction, the encoder 22 starts recording the angle and reaches the reverse limit, the output of the torque sensor 25 reaches the limit, and the angle of the encoder 22 at the moment is recorded, namely, theta = theta2The angle of the midpoint can be calculated and determined as thetaM=（θ2-θ1) /2, the rotating electrical machine 23 rotates in the forward direction θM=（θ2-θ1) And 2, finding a middle point which is the angle middle point between the forward limiting position and the reverse limiting position.
After centering is completed, the first electric clamping unit 4 is started to clamp the worm gear shaft 102 of the torque sensor assembly 100 on the first supporting block 31, and the drilling unit 62 is started to drill holes, so that automatic centering and drilling work of the torque sensor assembly of the automobile power-assisted steering system is completed.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.
Claims (7)
1. An automatic centering and punching device for a torque sensor assembly of an automobile power-assisted steering system comprises the torque sensor assembly, wherein the torque sensor assembly consists of a lower steering shaft, a worm wheel shaft, a torsion bar, a sliding sleeve and a return spring which are coaxial;
the centering mechanism comprises a bracket fixedly arranged on the supporting plate, and the bracket is sequentially connected with a coaxial encoder, a rotating motor, a first coupler, a torque sensor, a second coupler and a spline sleeve;
the supporting and positioning mechanism comprises a first supporting block, a second supporting block and a positioning motor which are sequentially arranged along the axis direction of the spline housing, the first supporting block is fixedly arranged on the supporting plate, the second supporting block is connected with the positioning motor fixedly arranged on the supporting plate, a strip-shaped chute is further arranged on one side, close to the positioning motor, of the second supporting block, a sliding rail corresponding to the chute is fixedly arranged on the positioning motor, the torque sensor assembly is arranged on the first supporting block and the second supporting block, and the positioning motor is used for pushing the second supporting block and enabling the worm wheel shaft to be sleeved with the spline housing, so that the positioning of the torque sensor assembly is completed;
the specific positioning process is as follows:
firstly, horizontally placing a torque sensor assembly to be punched on a V-shaped groove of a first supporting block and a V-shaped groove of a second supporting block, starting a positioning motor when the torque sensor assembly is coaxial with a spline sleeve, pushing the second supporting block to move towards the spline sleeve by the positioning motor, pushing the side face of a worm wheel shaft of the torque sensor assembly to abut against the side face of the first supporting block by the second supporting block, embedding a shaft lever of the worm wheel shaft into the spline sleeve, and abutting the side face of the second supporting block against a shaft shoulder of a steering lower shaft to complete supporting and positioning of the torque sensor assembly;
the clamping mechanism comprises a first electric clamping unit and a second electric clamping unit which are the same in size and structure, the first electric clamping unit is fixedly arranged on a supporting plate on one side of a first supporting block and used for clamping a worm wheel shaft of a torque sensor assembly on the supporting and positioning mechanism, and the second electric clamping unit is fixedly arranged on a supporting plate on one side of a second supporting block and used for clamping a steering lower shaft of the torque sensor assembly on the supporting and positioning mechanism;
the drilling mechanism comprises a support frame fixedly arranged on the supporting plate, and a drilling unit is fixedly arranged on the support frame;
the control mechanism comprises a control unit, and the control unit is respectively electrically connected with the positioning motor, the first electric clamping unit, the second electric clamping unit, the drilling unit, the torque sensor, the encoder and the touch screen.
2. The automatic centering and punching device for the torque sensor assembly of the power steering system of an automobile according to claim 1, wherein the first electric clamping unit and the second electric clamping unit each comprise a clamping plate, the middle portion of the clamping plate is hinged to a support rod fixedly arranged on a support plate, a push rod motor is arranged below the support plate, and a push rod of the push rod motor penetrates through the support plate and is hinged to one end of the clamping plate.
3. The automatic centering and punching device for a torque sensor assembly of an automobile power steering system according to claim 1, wherein the rotating motor is a stepping motor.
4. The automatic centering and punching device for a torque sensor assembly of an automobile power steering system according to claim 1, wherein the positioning motor is a lead screw motor.
5. The automatic centering and punching device for a torque sensor assembly of an automobile power steering system according to claim 1, wherein the first support block and the second support block are provided with a V-shaped groove at the center.
6. The automatic centering and punching device for a torque sensor assembly of an automobile power steering system according to claim 1, wherein the encoder is a rotary encoder.
7. The automatic centering and punching device for a torque sensor assembly of an automobile power steering system of claim 1, wherein the control unit is ZK3U-32-10 AD.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811436073.XA CN109590504B (en) | 2018-11-28 | 2018-11-28 | Automatic centering and punching device for torque sensor assembly of automobile power-assisted steering system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811436073.XA CN109590504B (en) | 2018-11-28 | 2018-11-28 | Automatic centering and punching device for torque sensor assembly of automobile power-assisted steering system |
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| Publication Number | Publication Date |
|---|---|
| CN109590504A CN109590504A (en) | 2019-04-09 |
| CN109590504B true CN109590504B (en) | 2020-10-13 |
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| CN201811436073.XA Active CN109590504B (en) | 2018-11-28 | 2018-11-28 | Automatic centering and punching device for torque sensor assembly of automobile power-assisted steering system |
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Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2725872Y (en) * | 2004-07-12 | 2005-09-14 | 天津市天派工业自动化技术有限公司 | Automobile gear box loading detection test bench |
| CN202648962U (en) * | 2012-05-24 | 2013-01-02 | 长春科威机械有限责任公司 | Rack-and-pinion type hydraulic power steering gear performance test stand |
| CN203518982U (en) * | 2013-10-26 | 2014-04-02 | 湖北唯思凌科装备制造有限公司 | Clearance detecting machine station for worm gear and worm of automotive electric steering device |
| CN204495545U (en) * | 2015-01-07 | 2015-07-22 | 广东和氏自动化技术股份有限公司 | Automobile rotary valve assembly synthesis intelligent detection equipment |
| CN204495382U (en) * | 2015-01-07 | 2015-07-22 | 广东和氏自动化技术股份有限公司 | Automobile rotary valve assembly and nut assembly synthesize intelligent detection equipment |
| CN204679209U (en) * | 2015-04-30 | 2015-09-30 | 荆州恒隆汽车零部件制造有限公司 | A kind of electric steering column torque sensor mid point demarcates board |
| CN106002756A (en) * | 2016-06-21 | 2016-10-12 | 苏州骏发精密机械有限公司 | Lever type clamping jig |
| CN106124202B (en) * | 2016-08-16 | 2018-10-16 | 合肥通用机械研究院有限公司 | A kind of passenger car control axle assembly shifting property test platform |
| CN107097078A (en) * | 2017-05-16 | 2017-08-29 | 常熟市金华机械股份有限公司 | A kind of frock clamp for being exclusively used in motor turning Enforceable shaft Milling Machining |
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