An input shaft loading assembly for a recirculating ball steering gear gap detection device

Abstract

The utility model relates to a kind of input shaft loading assembly of recirculating ball steering gear clearance detection device, belong to recirculating ball steering gear clearance detection device detection component technical field.The input shaft loading assembly of recirculating ball steering gear clearance detection device, including base, bearing seat A, bearing seat B, outer shell, clamp bladder, clamp tight ware, partition piston, sliding shell and transmission shaft;Base is equipped with bearing seat A and bearing seat B at interval;The bearing seat A is equipped with driving motor;The bearing seat B is equipped with intermediate shaft;Driving motor and intermediate shaft are connected by torque sensor each other;The one end of intermediate shaft is fixed with transmission shaft by coupling.The input shaft loading assembly of recirculating ball steering gear clearance detection device, compact structure, ingenious design, especially suitable for the need of recirculating ball steering gear clearance detection device use.

Description

Technical Field

[0001] This utility model relates to an input shaft loading component of a recirculating ball steering gear clearance detection device, belonging to the technical field of detection components for recirculating ball steering gear clearance detection devices. Background Technology

[0002] In the field of recirculating ball steering gear manufacturing technology, after production, the recirculating ball steering gear needs to undergo clearance testing using testing equipment. During the clearance testing process, a loading assembly is required to provide a certain torque to the input shaft of the recirculating ball steering gear. Existing loading assemblies directly engage with the splined input shaft on the recirculating ball steering gear via a splined sleeve, and then a motor provides torque to the recirculating ball steering gear through the splined sleeve. While this meets the requirements to a certain extent, because the spline teeth of the splined sleeve are inserted into the spline groove on the splined input shaft of the recirculating ball steering gear, a certain clearance inevitably exists between the spline teeth and the spline groove. This further leads to the problem of low detection accuracy in the recirculating ball steering gear clearance testing device. Therefore, it is necessary to develop a new input shaft loading assembly to solve the problem of low accuracy in the operation of existing recirculating ball steering gear clearance testing devices. Summary of the Invention

[0003] The purpose of this utility model is to provide an input shaft loading component with a compact structure and ingenious design to solve the problem of low accuracy in the operation of existing recirculating ball steering gear clearance detection devices.

[0004] The technical solution of this utility model is: An input shaft loading assembly for a recirculating ball steering gear clearance detection device includes a base, bearing housing A, bearing housing B, outer shell, clamping chamber, clamping device, separating piston, sliding shell, and drive shaft. Bearing housing A and bearing housing B are spaced apart on the base. A drive motor is mounted on bearing housing A. An intermediate shaft is mounted on bearing housing B. The drive motor and intermediate shaft are interconnected via a torque sensor. The intermediate shaft is characterized in that: a drive shaft is fixedly mounted at one end via a coupling; a clamping chamber is fixedly mounted at one end of the drive shaft; a positioning disc is fixedly mounted on the drive shaft at one end of the clamping chamber; a clamping device is mounted on the drive shaft on one side of the positioning disc; a separating piston is mounted on the drive shaft on the other side of the positioning disc via a bearing; and a sliding shell is slidably mounted on the base of the outer ring of the separating piston and clamping device.

[0005] The clamping device includes a mounting plate, a clamping sleeve, a compression spring, and guide pins; the mounting plate is fixedly mounted on the drive shaft on one side of the positioning plate; multiple guide pins are evenly installed on the mounting plate; the clamping sleeve is slidably mounted on the guide pins; a limit nut is installed after one end of the guide pin passes through the clamping sleeve; a compression spring is installed on the guide pin between the clamping sleeve and the mounting plate.

[0006] The clamping sleeve has a rotating structure with a "convex" shaped cross-section; the inner end of the clamping sleeve is provided with a trumpet-shaped extrusion surface.

[0007] The clamping liner has a cylindrical structure; one end of the clamping liner is provided with a pressure-bearing conical surface; multiple clearance slots are provided at intervals on the pressure-bearing conical surface; multiple locking teeth are evenly distributed on the inner hole of one end of the clamping liner.

[0008] The sliding housing includes a front housing, a middle housing, and a rear housing; the front housing and the rear housing are fixedly mounted at both ends of the middle housing, respectively; a guide pin is fixedly mounted at the lower end of the front housing; the guide pin is slidably connected to a long sliding hole on the base; both the front housing and the middle housing are slidably and sealingly connected to the separator piston; a sealed cavity is formed between the front housing and the middle housing; vent holes are provided at both ends of the sealed cavity; and an annular hook plate is provided at one end of the rear housing.

[0009] The advantages of this utility model are: The input shaft loading assembly of this recirculating ball steering gear clearance detection device is compact and ingeniously designed. During operation, the clamp can clamp and fix the spline shaft on the recirculating ball steering gear from the outside. At this time, the clamp and the spline shaft on the recirculating ball steering gear are in close contact without any gap. This solves the problem of low accuracy caused by gaps when existing recirculating ball steering gear clearance detection devices drive the input shaft of the recirculating ball steering gear to complete the detection through the spline shaft. It is particularly suitable for the needs of recirculating ball steering gear clearance detection devices. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the isometric structure of this utility model; Figure 2 This is a schematic diagram of the structure of this utility model; Figure 3 for Figure 2 Enlarged structural diagram at point A; Figure 4 This is a cross-sectional structural diagram of the present invention; Figure 5 for Figure 4 Enlarged structural diagram at point B; Figure 6 This is a schematic diagram of the structure of this utility model after removing the sliding shell; Figure 7 for Figure 6 Enlarged structural diagram at point C; Figure 8 for Figure 6 A schematic diagram of the right-side view structure; Figure 9 for Figure 8 Schematic diagram of the structure in the DD direction; Figure 10 for Figure 9 Enlarged structural diagram at point E; Figure 11 This is a schematic diagram of the structure of the bladder clamp of this utility model.

[0011] In the diagram: 1. Base; 2. Bearing housing A; 3. Bearing housing B; 4. Drive motor; 5. Intermediate shaft; 6. Torque sensor; 7. Coupling; 8. Drive shaft; 9. Clamping sleeve; 10. Positioning plate; 11. Clamping device; 12. Separating piston; 13. Sliding housing; 14. Mounting plate; 15. Guide pin; 16. Clamping sleeve; 17. Limiting nut; 18. Compression spring; 19. Extrusion surface; 20. Compression cone surface; 21. Clearance seam; 22. Snap-fit ​​teeth; 23. Front housing; 24. Intermediate housing; 25. Rear housing; 26. Guide pin; 27. Long sliding hole; 28. Sealing cavity; 29. ​​Vent hole; 30. Annular hook plate. Detailed Implementation

[0012] The input shaft loading assembly of the recirculating ball steering gear clearance detection device includes a base 1, bearing housing A2, bearing housing B3, outer shell, clamp 9, clamping device 11, separating piston 12, sliding housing 13, and drive shaft 8 (see the attached instruction manual). Figure 1 , 2 and 4).

[0013] Bearing housing A2 and bearing housing B3 are spaced apart on the base 1; a drive motor 4 is mounted on bearing housing A2. An intermediate shaft 5 is mounted on bearing housing B3; the drive motor 4 and the intermediate shaft 5 are interconnected via a torque sensor 6 (see the attached instruction manual). Figure 1 , 2 (and 4). When the drive motor 4 is working, it can drive the intermediate shaft 5 to rotate synchronously through the torque sensor 6; the torque sensor 6 can monitor the output torque of the drive motor 4.

[0014] One end of the intermediate shaft 5 is fixedly connected to the drive shaft 8 via the coupling 7; one end of the drive shaft 8 is fixedly connected to the clamp 9 (see the instruction manual appendix). Figure 4 and 5 ).

[0015] The clamping liner 9 has a cylindrical structure; one end of the clamping liner 9 is provided with a pressurized conical surface 20; a plurality of avoiding slots 21 are arranged at intervals on the pressurized conical surface 20; a plurality of clamping teeth 22 are uniformly distributed on the inner hole at one end of the clamping liner 9. The purpose of arranging the clamping liner 9 in this way is to enable the pressurized conical surface 20 of the clamping liner 9 to contract inward after being pressed, and finally clamp the spline groove of the spline input shaft on the recirculating ball steering gear through the clamping teeth 22; in this way, the clamping teeth 22 can be in gapless contact with the spline groove and clamp the spline input shaft; thus when the clamping liner 9 rotates, it can drive the spline input shaft of the recirculating ball steering gear to rotate synchronously, thereby solving the problem of low detection accuracy caused by the gap between the spline teeth of the spline sleeve and the spline groove on the spline input shaft when the existing gap detection device for recirculating ball steering gear directly uses the spline sleeve to sleeve with the spline input shaft.

[0016] A positioning disc 10 is fixedly installed on the transmission shaft 8 at one end of the clamping liner 9; a clamper 11 is installed on the transmission shaft 8 at one side of the positioning disc 10 (see the description of the drawings Figure 7 and 10 ).

[0017] The clamper 11 comprises a mounting disc 14, a clamping sleeve 16, a compression spring 18 and a guide sliding pin 15; the transmission shaft 8 at one side of the positioning disc 10 is fixedly provided with the mounting disc 14; a plurality of guide sliding pins 15 are uniformly installed on the mounting disc 14; the clamping sleeve 16 is slidably installed on the guide sliding pins 15; a limit nut 17 is installed after one end of the guide sliding pin 15 passes through the clamping sleeve 16; the compression spring 18 is installed on the guide sliding pin 15 between the clamping sleeve 16 and the mounting disc 14 (see the description of the drawings Figure 7 and 10 ).

[0018] The clamping sleeve 16 is a revolving body structure with a convex-shaped cross section; a flared extrusion surface 19 is arranged at the inner hole end of the clamping sleeve 16 (see the description of the drawings Figure 10 ).

[0019] The purpose of arranging the clamper 11 in this way is: under the extrusion of the elastic force of the compression spring 18, the clamping sleeve 16 always has a tendency to move toward the clamping liner 9; when the clamping sleeve 16 moves to the end position of the guide sliding pin 15, it can extrude the pressurized conical surface 20 of the clamping liner 9 through the extrusion surface 19, so that the pressurized conical surface 20 contracts inward into a clamping state.

[0020] A separating piston 12 is installed on the transmission shaft 8 at the other side of the positioning disc 10 through a bearing (see the description of the drawings Figure 5 and 7 ). The separating piston 12 is a revolving body structure with a "middle"-shaped cross section.

[0021] A sliding housing 13 is slidably installed on the base 1 at the outer ring of the separating piston 12 and the clamper 11 (see the description of the drawings Figure 3 , 4 and 5).

[0022] The sliding housing 13 includes a front housing 23, a middle housing 24, and a rear housing 25; the front housing 23 and the rear housing 25 are fixedly mounted at both ends of the middle housing 24, respectively; a guide pin 26 is fixedly mounted at the lower end of the front housing 23; the guide pin 26 is slidably connected to the elongated sliding hole 27 on the base 1; both the front housing 23 and the middle housing 24 are slidably and sealingly connected to the separator piston 12; a sealed cavity 28 is formed between the front housing 23 and the middle housing 24; vent holes 29 are provided at both ends of the sealed cavity 28; an annular hook plate 30 is provided at one end of the rear housing 25 (see the appendix of the specification). Figure 3 , 4 and 5).

[0023] The purpose of this sliding housing 13 configuration is to allow the sliding housing 13 to move to the left or right by filling or deflating the vent holes 29 at both ends of the sealed cavity 28 during operation.

[0024] When the splined input shaft of the recirculating ball steering gear gap detection device is inserted into the clamping chamber 9 and needs to be clamped, the sliding housing 13 moves to the extreme position towards the clamping chamber 9 by inflating or deflating the vent holes 29 at both ends of the sealed cavity 28. This position is where the front housing 23 contacts the separating piston 12. At this time, there is a certain gap between the annular hook plate 30 and the clamping sleeve 16, which reduces the frictional torque. The clamping sleeve 16 moves to the end of the guide pin 15 under the pressure of the compression spring 18. At this point, the clamping sleeve 16 can press the pressure cone surface 20 of the clamping chamber 9 through the compression surface 19, causing it to contract inward and clamp the splined input shaft of the recirculating ball steering gear. Subsequently, the drive motor 4 drives the intermediate shaft 5, transmission shaft 8, and clamping chamber 9 through the torque sensor 6 to rotate the splined input shaft of the recirculating ball steering gear. Thus, the loading assembly can cooperate with the recirculating ball steering gear gap detection device to complete the gap detection.

[0025] After the test is completed, by inflating or deflating the vents 29 at both ends of the sealed cavity 28, the sliding housing 13 is moved to its extreme position towards the drive motor 4. During this process, the annular hook plate 30 can press the clamping sleeve 16 to move towards the drive motor 4, causing the pressure cone surface 20 of the clamping chamber 9 to lose pressure. When the pressure cone surface 20 of the clamping chamber 9 loses pressure, it will return to its original position under its own elastic force, allowing the clamping chamber 9 to release the spline input shaft of the recirculating ball steering gear.

[0026] The input shaft loading assembly of this recirculating ball steering gear clearance detection device is compact and ingeniously designed. During operation, the clamp 9 can clamp and fix the spline shaft on the recirculating ball steering gear from the outside. At this time, the clamp 9 and the spline shaft on the recirculating ball steering gear are in close contact without any gap. This solves the problem of low accuracy caused by gaps when existing recirculating ball steering gear clearance detection devices drive the input shaft of the recirculating ball steering gear to complete the detection through the spline shaft. It is particularly suitable for the needs of recirculating ball steering gear clearance detection devices.

Claims

1. An input shaft loading assembly for a recirculating ball steering gear clearance detection device, comprising a base (1), bearing seat A (2), bearing seat B (3), outer shell, clamp (9), clamping device (11), separating piston (12), sliding shell (13), and drive shaft (8); bearing seat A (2) and bearing seat B (3) are spaced apart on the base (1); a drive motor (4) is mounted on the bearing seat A (2); an intermediate shaft (5) is mounted on the bearing seat B (3); the drive motor (4) and the intermediate shaft (5) are interconnected by a torque sensor (6); characterized in that: One end of the intermediate shaft (5) is fixedly mounted with a drive shaft (8) via a coupling (7); one end of the drive shaft (8) is fixedly mounted with a clamp (9); a positioning plate (10) is fixedly mounted on the drive shaft (8) at one end of the clamp (9); a clamp (11) is mounted on the drive shaft (8) on one side of the positioning plate (10); a separating piston (12) is mounted on the drive shaft (8) on the other side of the positioning plate (10) via a bearing; a sliding housing (13) is slidably mounted on the base (1) of the outer ring of the separating piston (12) and the clamp (11).

2. A pitman loading assembly for a recirculating ball steering gear gap detection device as defined in claim 1 wherein: The clamping device (11) includes a mounting plate (14), a clamping sleeve (16), a compression spring (18), and a guide pin (15); the mounting plate (14) is fixedly mounted on the drive shaft (8) on one side of the positioning plate (10); a plurality of guide pins (15) are evenly mounted on the mounting plate (14); the clamping sleeve (16) is slidably mounted on the guide pin (15); a limit nut (17) is installed after one end of the guide pin (15) passes through the clamping sleeve (16); a compression spring (18) is installed on the guide pin (15) between the clamping sleeve (16) and the mounting plate (14).

3. A pitman loading assembly for a recirculating ball steering gear gap detection device as defined in claim 2 wherein: The clamping sleeve (16) has a rotating structure with a "convex" cross-section; the inner end of the clamping sleeve (16) is provided with a trumpet-shaped extrusion surface (19).

4. A pitman loading assembly for a recirculating ball steering gear gap detection device according to claim 3, wherein: The clamping liner (9) has a cylindrical structure; one end of the clamping liner (9) is provided with a pressure-bearing conical surface (20); multiple clearance slots (21) are provided at intervals on the pressure-bearing conical surface (20); multiple snap-fit ​​teeth (22) are evenly distributed on the inner hole of one end of the clamping liner (9).

5. A pitman loading assembly for a recirculating ball steering gear gap detection device as defined in claim 4 wherein: The sliding housing (13) includes a front housing (23), a middle housing (24), and a rear housing (25); the two ends of the middle housing (24) are respectively fixedly fitted with the front housing (23) and the rear housing (25); the lower end of the front housing (23) is fixedly fitted with a guide pin (26); the guide pin (26) is slidably connected to the long sliding hole (27) on the base (1); the front housing (23) and the middle housing (24) are both slidably sealed connected to the separator piston (12); a sealed cavity (28) is formed between the front housing (23) and the middle housing (24); both ends of the sealed cavity (28) are provided with vent holes (29); one end of the rear housing (25) is provided with an annular hook plate (30).

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