Rack for detecting clearance of speed reducing mechanism

Abstract

The utility model relates to a rack for detecting a gap of a speed reducing mechanism. The rack comprises a base, a shell pressing mechanism, a worm locking structure and an axial measuring mechanism, the shell pressing mechanism is installed on the upper left portion of the bottom plate. The worm locking structure is installed on the lower left portion of the bottom plate, and the axial measuring mechanism is installed on the upper right portion of the bottom plate. According to the utility model, the clearance of the speed reducing mechanism is automatically detected, the clearance result of a product is accurately traced, the operation difficulty is reduced, the operation efficiency is improved, manual operation errors are effectively avoided, the consistency of product quality is ensured, and the product quality is improved.

Description

Technical Field

[0001] The utility model relates to a detection bench, in particular to a bench used for detecting the clearance of a speed reduction mechanism, and belongs to the technical field of automobile parts manufacturing. Background Art

[0002] According to the applicant's understanding, the existing clearance detection is done manually. During operation, the reduction mechanism is first fixed on the tooling, and then the limit block is fixed on the worm end to lock the worm. A torque scale is used to apply torque at the upper end of the output shaft, and a ruler and a dial indicator are used to measure the clearance at the lower end of the output shaft. However, this method has the following disadvantages:

[0003] 1. Inspection is based on human judgment and has poor accuracy;

[0004] 2. Low work efficiency and high labor costs;

[0005] 3. It is highly dependent on employee proficiency, prone to misoperation, and difficult to ensure product quality consistency. Utility Model Content

[0006] The technical problem to be solved by the utility model is to overcome the shortcomings of the prior art and provide a clearance detection stand for a speed reduction mechanism, which has a reasonable structure, is easy to use, can realize automatic clearance detection, and greatly improves accuracy.

[0007] In order to achieve the above purpose, the specific technical scheme of the utility model is as follows: a test stand for detecting the clearance of a reduction mechanism, comprising a base and a shell clamping mechanism, a worm locking structure, and an axial measuring mechanism connected and fixed thereto; the shell clamping mechanism is vertically installed on the upper left side of the base plate; the worm locking structure is installed on the bottom of the base plate, directly below the shell clamping mechanism; the axial measuring mechanism is installed on the upper right side of the base plate, and moves left and right along the longitudinal direction of the base plate.

[0008] Furthermore, the shell clamping mechanism includes an upper left column and an upper right column symmetrically installed on the base plate, the tops of which are connected to a first electric cylinder fixing plate placed laterally along the base plate through fasteners, a first electric cylinder is vertically installed below the first electric cylinder fixing plate, the output end of the first electric cylinder is threadedly connected to the shell pressing head located directly below it, and drives the shell pressing head to move up and down; below the shell pressing head is a speed reduction mechanism fixing fixture fixedly installed on the base plate, and the speed reduction mechanism fixing fixture is used to fix the speed reduction mechanism sample.

[0009] Furthermore, the speed reduction mechanism fixing fixture and the speed reduction mechanism sample worm end are positioned through the motor bolt hole, the end face contact is limited, and the housing support block provides auxiliary support.

[0010] Furthermore, the deceleration mechanism fixing tooling includes a left handle and a right handle symmetrically installed on the fixing tooling bottom plate; a limiting boss is vertically installed above the fixing tooling bottom plate, located between the left handle and the right handle; a left locating pin and a right locating pin are distributed on the upper end surface of the limiting boss in sequence from left to right; the shell support block is located above the fixing tooling bottom plate and a shell support block is vertically installed at the rear end of the limiting step.

[0011] Furthermore, the tops of the upper left column and the upper right column are respectively connected and fixed to the first electric cylinder fixing plate via two upper nuts, and the bottoms are respectively connected and fixed to the base plate via two lower nuts.

[0012] Furthermore, the worm locking structure includes a lower left column, a lower right column, a second electric cylinder, a second electric cylinder base, a second electric cylinder fixing plate, a locking coupling and a lower locking joint; the second electric cylinder base is installed below the bottom plate and is located between the two lower nuts; the second electric cylinder and the second electric cylinder fixing plate are fixed together by bolts; the lower locking joint is riveted to the output end of the second electric cylinder through a spline; the locking coupling is arranged below the second electric cylinder base and is fixed to the lower locking joint by bolts; one end of the lower left column and the lower right column is fixed below the second electric cylinder base, and the other end is connected and fixed to the second electric cylinder fixing plate;

[0013] The locking coupling cooperates with the worm end of the reduction mechanism assembly, and is driven up and down by the electric cylinder to tighten the worm locking nut of the reduction mechanism sample and limit the displacement in the rotation direction.

[0014] Furthermore, a support plate is provided between the lower locking joint and the locking coupling, and the support plate is clearance-matched with the left and right columns through bearings.

[0015] Furthermore, the axial measuring mechanism comprises a spline locking joint, a flexible coupling structure, a servo motor, a measuring mechanism base and a slide rail structure;

[0016] The spline locking joint and the flexible coupling structure are connected together through a rotating shaft and bolts; a locking joint adjustment fixing sleeve, an angle sensor and a torque sensor are interference-connected between the two from left to right in sequence; the right side of the flexible coupling structure is connected to a servo motor, and the servo motor is connected and fixed to a measuring mechanism base arranged parallel to the bottom plate through a servo motor support seat; the locking joint adjustment fixing sleeve, the lower end of the torque sensor and the measuring mechanism base are connected together through bolts;

[0017] The slide rail structure is arranged between the measuring mechanism base and the bottom plate, and drives the measuring mechanism bottom plate to slide left and right and up and down.

[0018] Furthermore, the slide rail structure includes an upper slide rail, a lower slide rail and a slide rail base; the upper slide rails are two and are symmetrically arranged between the measuring mechanism base and the slide rail base, and the lower slide rails are two and are symmetrically arranged between the slide rail base and the bottom plate.

[0019] Furthermore, the slide rail base is connected to the bottom plate through a left fixing pin and a right fixing pin; by sliding the slide rail up and down left and right, the spline locking joint is ensured to lock the output end of the speed reduction mechanism sample and provide torque for detection.

[0020] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0021] The utility model realizes the function of automatically detecting the gap. Manual personnel only need to install the reduction mechanism assembly into the lower tooling, thereby reducing a large number of manual production beats, liberating labor, and eliminating errors caused by manual operation, thereby eliminating the risk of gap measurement errors; during the operation, the gap test results can be directly obtained, and the test results are matched one by one with the product for later traceability.

[0022] Since the electric steering column is a vital part of the vehicle steering system, the OEM will directly use the electric steering column in the process of producing the whole vehicle. The clearance of the electric steering column speed reduction mechanism is very important, which directly affects the driving experience of the whole vehicle on bumpy roads. The utility model speed reduction mechanism detection and measurement bench can automatically measure the clearance, accurately trace the clearance result of the product, reduce the difficulty of operation, improve the operation efficiency, effectively avoid manual operation errors, ensure the consistency of product quality, and improve customer satisfaction. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the utility model.

[0024] Figure 2 The left side view of the utility model Figure 1 .

[0025] Figure 3 The left side view of the utility model Figure 2 .

[0026] Figure 4 It is the front view of the utility model.

[0027] Figure 5 It is the front view of the fixing tool of the speed reduction mechanism of the utility model.

[0028] Description of the drawings: 1-upper left column nut; 2-upper right column nut; 3-first electric cylinder fixing plate; 4-first electric cylinder; 5-housing pressure head; 6-upper left column; 7-upper right column; 8-speed reduction mechanism fixing tool; 9-bottom plate; 10-lower right column nut; 11-lower left column nut; 12-lower locking joint; 13-second electric cylinder; 14-lower left column; 15-second electric cylinder fixing plate; 16-second electric cylinder base; 17-locking coupling; 18-support plate; 19-lower right column; 20-spline locking joint; 21- Locking joint adjustment fixing sleeve; 22-angle sensor; 23-torque sensor; 24-flexible coupling structure; 25-servo motor; 26-servo motor support seat; 27-measuring mechanism base; 28-upper left slide rail; 29-upper right slide rail; 30-right fixing pin; 31-lower right slide rail; 32-slide rail base; 33-lower left slide rail; 34-left fixing pin; 35-left handle; 36-left positioning pin; 37-right positioning pin; 38-right handle; 39-fixed tooling bottom plate; 40-limiting boss; 41-shell support block. DETAILED DESCRIPTION Example

[0029] This embodiment provides a clearance detection stand for a speed reduction mechanism, the structure of which is as follows: Figure 1-Figure 4 As shown, it includes a base and a pressing mechanism with the shell, a worm locking structure, and an axial measuring mechanism.

[0030] The housing clamping mechanism includes a left upper column nut, a right upper column nut, a first electric cylinder fixing plate, a first electric cylinder, a housing pressure head, a left upper column, a right upper column, a speed reduction mechanism fixing tool, a bottom plate, a right lower column nut, and a left lower column nut. The top of the left column and the right column are connected to the first electric cylinder fixing plate through the left upper column nut and the right upper column nut; the first electric cylinder upper fixing plate is connected to the first electric cylinder vertically below; the first electric cylinder is connected to the housing pressure head through a threaded connection directly below; the bottom of the left column and the right column are connected to the base through the left lower column nut and the right lower column nut; the lower part of the speed reduction mechanism fixing tool is connected to the base through bolts.

[0031] The deceleration mechanism fixing tooling includes a left handle and a right handle symmetrically installed on the fixing tooling bottom plate; a limiting boss is vertically installed above the fixing tooling bottom plate, located between the left handle and the right handle; a left locating pin and a right locating pin are distributed on the upper end surface of the limiting boss from left to right in sequence; the shell support block is located above the fixing tooling bottom plate and a shell support block is vertically installed at the rear end of the limiting step.

[0032] The worm locking structure includes a lower locking joint, a second electric cylinder, a lower left column, a second electric cylinder fixing plate, a second electric cylinder base, a locking coupling, a support plate, and a lower right column. The second electric cylinder base is connected to the bottom plate by bolts; the lower left column and the lower right column are connected to the second electric cylinder base by bolts; the support plate is connected to the left and right columns by bearings and is located at the lower end of the second electric cylinder base; the left and right columns are fixed to the second electric cylinder fixing plate by nuts; the second electric cylinder is fixed to the second electric cylinder base by bolts; the second electric cylinder is connected to the lower locking joint by spline riveting; the locking coupling is fixed to the support plate and the lower locking joint by bolts.

[0033] The axial measuring mechanism includes a spline locking joint, a locking joint adjustment sleeve, an angle sensor, a torque sensor, a flexible coupling structure, a servo motor, a servo motor support seat, a measuring mechanism base, a left upper slide rail, a right upper slide rail, a right fixing pin, a right lower slide rail, a slide rail base, a left lower slide rail, and a left fixing pin. The spline joint and the flexible coupling structure are connected together by a rotating shaft and a bolt process; the locking joint adjustment sleeve, the angle sensor, the torque sensor and the spline locking joint are connected together by bearing interference press-fitting, and are distributed from left to right between the spline locking joint and the flexible coupling; the flexible coupling structure and the servo motor are connected together by bolts; the servo motor and the servo motor support seat are connected together by bolts and a bearing structure; the servo motor support seat and the measuring mechanism base are connected together by bolts; the locking joint adjustment sleeve, the lower end of the torque sensor and the measuring mechanism base are connected together by bolts; the upper left slide rail and the upper right slide rail are connected to the measuring mechanism base by bolts; the upper left slide rail and the upper right slide rail are connected to the slide rail base by bolts; the left lower rail and the right lower rail are connected to the slide rail base by bolts; the left lower rail and the right lower rail are connected to the bottom plate by bolts; the slide rail base and the bottom plate are connected together by a left fixing pin and a right fixing pin.

[0034] The working process is as follows: the manual operation only requires the reduction mechanism assembly to be installed into the lower fixture, where the end face of the housing worm gear is matched with the contour constraint of the reduction mechanism fixed fixture. Further scan the housing code to start the equipment, and lightly press the clamping button. First, the housing pressure head presses the reduction mechanism assembly through the cylinder output to ensure that the reduction mechanism assembly has no displacement. Secondly, the locking coupling is moved up through the cylinder and the support block to lock the worm coupling and limit the movement of the worm in the rotation direction. Finally, by adjusting the slider forward and backward, ensure that the axis of the axial measuring mechanism is consistent with the reduction mechanism assembly, and lock the left and right fixing pins. Push the axial measuring mechanism to move left and right to ensure that the spline locking joint on the dynamic axial measuring mechanism matches the spline at the output end of the reduction mechanism, and the locking spline joint is locked.

[0035] Further press the test button, the axial measuring mechanism applies torque and measures the gap, and automatically generates the gap measurement value. After the test is completed, the clamping cylinder automatically releases, and the gap test results are uploaded to the traceability system and correspond to the assembly one by one for later traceability. After the test is completed, the housing pressure head and the lower locking joint are reset.

[0036] Manually take out the inspected product and put it into the next assembly station, take out a reduction mechanism assembly and put it into the lower tooling, scan the shell code to start the equipment, and perform gap detection.

[0037] In addition to the above embodiments, the present invention may also have other implementations. Any technical solution formed by equivalent replacement or equivalent transformation falls within the protection scope required by the present invention.

Claims

1. A test bench for detecting clearance of a speed reduction mechanism, characterized in that: It includes a base and a shell clamping mechanism, a worm locking structure, and an axial measuring mechanism connected and fixed thereto; the shell clamping mechanism is vertically installed on the upper left side of the base plate; the worm locking structure is installed below the base plate, directly below the shell clamping mechanism; the axial measuring mechanism is installed on the upper right side of the base plate and moves left and right along the longitudinal direction of the base plate.

2. The stand for detecting the clearance of the speed reduction mechanism according to claim 1, characterized in that: The shell clamping mechanism includes an upper left column and an upper right column symmetrically installed on the base plate, the tops of which are connected to a first electric cylinder fixing plate placed laterally along the base plate through fasteners, a first electric cylinder is vertically installed below the first electric cylinder fixing plate, the output end of the first electric cylinder is threadedly connected to a shell pressing head located directly below it, and drives the shell pressing head to move up and down; below the shell pressing head is a speed reduction mechanism fixing fixture fixedly installed on the base plate, and the speed reduction mechanism fixing fixture is used to fix the speed reduction mechanism sample.

3. The stand for detecting the clearance of the speed reduction mechanism according to claim 2, characterized in that: The speed reduction mechanism fixing fixture and the speed reduction mechanism sample worm end are positioned through the motor bolt hole, the end face contact is limited, and the housing support block provides auxiliary support.

4. The stand for detecting the clearance of the speed reduction mechanism according to claim 3, characterized in that: The deceleration mechanism fixing tooling includes a left handle and a right handle symmetrically installed on the fixing tooling bottom plate; a limiting boss is vertically installed above the fixing tooling bottom plate, located between the left handle and the right handle; a left locating pin and a right locating pin are distributed on the upper end surface of the limiting boss from left to right in sequence; the shell support block is located above the fixing tooling bottom plate and a shell support block is vertically installed at the rear end of the limiting step.

5. The stand for detecting the clearance of the speed reduction mechanism according to claim 4, characterized in that: The tops of the left upper column and the right upper column are respectively connected and fixed to the first electric cylinder fixing plate through two upper nuts, and the bottoms are respectively connected and fixed to the bottom plate through two lower nuts.

6. The stand for detecting the clearance of the speed reduction mechanism according to claim 1, characterized in that: The worm locking structure includes a lower left column, a lower right column, a second electric cylinder, a second electric cylinder base, a second electric cylinder fixing plate, a locking coupling and a lower locking joint; the second electric cylinder base is installed below the bottom plate and is located between the two lower nuts; the second electric cylinder and the second electric cylinder fixing plate are fixed together by bolts; the lower locking joint is riveted to the output end of the second electric cylinder through a spline; the locking coupling is arranged below the second electric cylinder base and is fixed to the lower locking joint by bolts; one end of the lower left column and the lower right column is fixed below the second electric cylinder base, and the other end is connected and fixed to the second electric cylinder fixing plate; The locking coupling cooperates with the worm end of the reduction mechanism assembly, and is driven up and down by the electric cylinder to tighten the worm locking nut of the reduction mechanism sample and limit the displacement in the rotation direction.

7. The stand for detecting the clearance of the speed reduction mechanism according to claim 6, characterized in that: A support plate is also provided between the lower locking joint and the locking coupling, and the support plate is clearance-matched with the left and right columns through bearings.

8. The stand for detecting the clearance of the speed reduction mechanism according to claim 7, characterized in that: The axial measuring mechanism comprises a spline locking joint, a flexible coupling structure, a servo motor, a measuring mechanism base and a slide rail structure; The spline locking joint and the flexible coupling structure are connected together through a rotating shaft and bolts; a locking joint adjustment fixing sleeve, an angle sensor and a torque sensor are interference-connected between the two from left to right in sequence; the right side of the flexible coupling structure is connected to a servo motor, and the servo motor is connected and fixed to a measuring mechanism base arranged parallel to the bottom plate through a servo motor support seat; the locking joint adjustment fixing sleeve, the lower end of the torque sensor and the measuring mechanism base are connected together through bolts; The slide rail structure is arranged between the measuring mechanism base and the bottom plate, and drives the measuring mechanism bottom plate to slide left and right and up and down.

9. The stand for detecting the clearance of the speed reduction mechanism according to claim 8, characterized in that: The slide rail structure comprises an upper slide rail, a lower slide rail and a slide rail base; there are two upper slide rails, which are symmetrically arranged between the measuring mechanism base and the slide rail base, and there are two lower slide rails, which are symmetrically arranged between the slide rail base and the bottom plate.

10. The stand for detecting the clearance of the speed reduction mechanism according to claim 9, characterized in that: The slide rail base and the bottom plate are connected together by a left fixing pin and a right fixing pin; by sliding the slide rail left and right and up and down, it is ensured that the spline locking joint locks the output end of the reduction mechanism sample and provides torque for detection.

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