Gap measuring device for gear rack steering assembly

Abstract

The utility model discloses a gear rack steering assembly gap measuring device comprising a U-shaped connecting support, one end of the inner side of the connecting support is provided with a cushion block, and the other end of the inner side of the connecting support is provided with a clamping jaw; the clamping jaw is disc-shaped and is provided with a first through hole, and a measuring rod of the dial indicator passes through the first through hole and is connected with the clamping jaw. During gap detection, steering torque is applied to the steering input shaft, the steering shaft drives the steering gear to rotate, radial component force generated at the meshing position of the steering gear and the rack enables the rack to move in the radial direction, the rack pushes the pressing block to move, and the numerical value of the gap of the pressing block can be detected through axial movement of the probe of the dial indicator.

Description

TECHNICAL FIELD

[0001] The utility model relates to measurement technical field especially relates to a gear and rack steering assembly gap measuring device. BACKGROUND

[0002] For gear and rack steering gear, when the gear moves, the meshing part of gear and rack will produce tangential driving force to drive rack to move linearly, but at the same time, a separation force along the radial direction of rack will be produced to make gear and rack produce mutual separation movement tendency, at this time, it is needed to increase the pressing block mechanism at the back of rack to overcome the separation force of gear to ensure that gear and rack are always in meshing state. The pressing block mechanism is often composed of pressing block, rubber O ring, spiral spring and adjusting nut, and the rack pressing block presses the rack against the steering gear through spring force to ensure the gapless meshing between gear and rack.

[0003] Since the tooth back of rack is not an absolutely ideal circular arc surface, it is needed to leave a certain gap value between pressing block and adjusting nut to compensate the circular arc surface profile, otherwise, it will lead to too large rack moving force or even rack moving jam, but due to the existence of this pressing block gap, the pressing block hits the adjusting nut to produce knocking noise at the meshing moment of gear and rack, according to a large number of tests, the noise produced when the pressing block gap is within 0.1mm is within the acceptable range, therefore, the automobile steering gear manufacturers will also control this gap to 100% when the steering gear is offline to deliver the steering gear. SUMMARY

[0004] In view of the above problems, the utility model provides a gear and rack steering assembly gap measuring device.

[0005] In order to achieve the above purpose, the utility model provides a gear and rack steering assembly gap measuring device, which comprises a connecting support, the connecting support is U-shaped, one end of the inner side of the connecting support is provided with a pad, and the other end is provided with a jaw.

[0006] Among them, the jaw is disc-shaped and is provided with a first through hole, and the measuring rod of the dial gauge is connected with the jaw through the first through hole.

[0007] Preferably, the pad is a cube, and the pad is provided with four first threaded holes and a second threaded hole, the connecting support is provided with a second through hole and a third threaded hole corresponding to the first threaded hole and the second threaded hole respectively, a supporting screw is connected with the pad through the third threaded hole and the second threaded hole, and a first screw is connected with the pad through the second through hole and the first threaded hole.

[0008] Preferably, a spring is sleeved on the supporting screw, one end of the spring is connected with the supporting screw, and the other end is in contact with the connecting support.

[0009] Preferably, a transversely-through groove is arranged on the connecting support, a third through hole is arranged on one side of the groove, a fourth threaded hole is arranged on the opposite side of the groove in correspondence, and a connecting rod is arranged on one end of the claw in correspondence with the groove.

[0010] Preferably, a fourth through hole is arranged on the connecting rod in correspondence with the third through hole.

[0011] Preferably, a boss is arranged on the claw.

[0012] Compared with the prior art, the utility model has the beneficial effects that:

[0013] The first front side special-shaped stand and the second front side special-shaped stand are in U-shaped form, compared with the columnar shape, the elevator door can run into the stand, the width of the door area running area is increased, and the width of the elevator car opening is increased. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 is the structure diagram of the rack and pinion steering assembly gap measuring device of the utility model;

[0015] Figure 2 is the structure diagram of the connecting support in the rack and pinion steering assembly gap measuring device of the utility model;

[0016] Figure 3 is the structure diagram of the cushion block in the rack and pinion steering assembly gap measuring device of the utility model;

[0017] Figure 4 is the structure diagram of the claw in the rack and pinion steering assembly gap measuring device of the utility model;

[0018] Figure 5 is the test diagram of the rack and pinion steering assembly gap measuring device of the utility model. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be described clearly and completely in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0020] In the description of the utility model, it needs to explain, the term "center", "upper", "lower", "left", "right", "vertical", "horizontal", "internal", "external" and so on indicate the orientation or position relation based on the orientation or position relation shown in the drawing, only for the convenience of describing the utility model and simplifying the description, and not indicate or imply that the device or element must have a particular orientation, construct and operate in a particular orientation, therefore, it cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0021] In the description of the utility model, it also needs to explain that, unless otherwise specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected, it can be mechanically connected, or it can be electrically connected, it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the communication between the two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0022] The following will be combined with the drawings Figures 1-5 The utility model is further described in detail:

[0023] Referring to Figure 1 The utility model provides a gear and rack steering assembly gap measuring device, connecting support 4, connecting support 4 is U type, and one end of the inner side of connecting support 4 is equipped with pad 5, and the other end is equipped with jaw 8.

[0024] Among them, the jaw 8 is discoid and is equipped with the first through hole 8-1, and the measuring rod of the dial gauge 7 is connected with the jaw 8 through the first through hole 8-1.

[0025] Specifically, the pressure block gap measuring device is composed of 1 M8 locking first screw 1, 4 M4 support screws 2, 4 compression springs 3, 1 connecting support 4, 1 pad 5, 3 M4 screws 6, 1 dial gauge 7 and 1 jaw 8, and the size of all components is adjusted according to the size of the steering gear.

[0026] Referring to Figure 2 Connecting support 4 is equipped with transverse through groove 4-5, one side of groove 4-5 is equipped with through third through hole 4-4, and the opposite side is equipped with through fourth threaded hole 4-3, and one end of jaw 8 is equipped with connecting rod matched with groove 4-5.

[0027] Specifically, the two ends of the connecting bracket 4 are respectively provided with four second through holes 4-1 matched with the structure of the M4 supporting screw 2, one third threaded hole 4-2 matched with the structure of the M8 locking screw 1, two through holes 4-4 matched with the M4 screw 6, two threaded through holes 4-3 connected with the M4 screw 6, and a transversely penetrating groove 4-5, and the outer dimensions of the connecting bracket are adjusted according to the outer dimensions of the steering housing.

[0028] Referring to Figure 3 , the cushion block 5 is a cube, and the cushion block is provided with four first threaded holes 5-1 and one second threaded hole 5-2, and the connecting bracket 4 is provided with a second through hole 4-1 and a third threaded hole 4-2 corresponding to the first threaded hole 5-1 and the second threaded hole 5-2, respectively, the supporting screw 2 is connected with the cushion block 5 by penetrating the third threaded hole 4-2 and the second threaded hole 5-1, and the first screw 1 is connected with the cushion block 5 by penetrating the third threaded hole 4-2 and the first threaded hole 5-1.

[0029] Further, the supporting screw 2 is sleeved with a spring 3, one end of the spring 3 is connected with the supporting screw 2, and the other end is in contact with the connecting bracket 4.

[0030] Specifically, the end face of the cushion block 5 is provided with four threaded holes 5-1 matched with the supporting screw, and one threaded hole 5-2 matched with the locking screw 1, and in order to prevent the shell from being scratched during detection, the material of the cushion block is selected as PBT plastic material.

[0031] Referring to Figure 4 , the claw 8 is provided with a boss 8-3, and the connecting rod is provided with a fourth through hole 8-4 corresponding to the third through hole 4-4.

[0032] Specifically, the claw 8 is provided with a through hole 8-1 for passing through the dial gauge, a threaded through hole 8-2 matched with the screw 6, a characteristic boss 8-3 matched with the reinforcing rib on the steering housing, and a threaded through hole 8-4 matched with the screw 6.

[0033] Further, the four supporting screws 2 are pre-tightened and connected with the four threaded holes 5-1 of the cushion block 5 by penetrating the four compression springs 3 and the four through holes 4-1 of the connecting bracket 4, the locking screw 1 is connected with the threaded through hole 5-2 of the cushion block 5 by penetrating the threaded through hole 4-2 of the connecting bracket 4, the boss of the claw 8 penetrates into the groove 4-5 of the connecting bracket 4, and the two screws 6 are connected with the threaded through hole 4-3 of the connecting bracket 4 by penetrating the through hole 4-4 of the connecting bracket 4, the through hole 8-4 of the claw 8, respectively.

[0034] Referring to Figure 5After the completion of the assembly of the steering gear, first, the block gap measuring device is installed on the steering gear, the jaw 8 is attached to the end surface of the steering housing 10 at the block, the gasket 5 is pressed on the steering housing 10 by tightening the locking screw 1, then the dial gauge 7 is passed through the through hole 8-1 of the jaw 8, the probe of the dial gauge is pressed on the rack liner, the locking screw 6 is used to fix the dial gauge 8 on the block gap measuring device, and finally the dial pointer is reset to zero. When the gap is detected, the steering torque is applied to the steering input shaft, the steering shaft drives the steering gear 13 to rotate, the radial component force generated at the meshing position of the steering gear 13 and the rack 12 makes the rack move along the radial direction, the rack pushes the block 11 to move, and the axial movement of the probe of the dial gauge can detect the value of the block gap; the main function of the supporting screw 2 and the compression spring 3 is to pre-tighten the gasket 5 and reduce the shaking of the gasket 5 when the turntable is pre-tightened.

[0035] The preferred embodiments of the utility model are merely used for limiting the utility model, and the utility model can be changed and varied for the person skilled in the art. Any modification, equivalent replacement, improvement and the like within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A rack and pinion steering assembly lash measuring device, characterized by, The connecting support is in U shape, and a pad is arranged at one end of the inner side of the connecting support, and a claw is arranged at the other end. The claw is in disc shape, and a first through hole is arranged on the claw, and a measuring rod of the dial gauge is connected with the claw through the first through hole.

2. The rack and pinion steering assembly lash measuring device of claim 1, wherein, The pad is in square shape, and four first threaded holes and a second threaded hole are arranged on the pad, and a second through hole and a third threaded hole corresponding to the first threaded hole and the second threaded hole are arranged on the connecting support, a supporting screw is connected with the pad through the third threaded hole and the second threaded hole, and a first screw is connected with the pad through the second through hole and the first threaded hole.

3. The rack and pinion steering assembly lash measuring device of claim 2, wherein, A spring is sleeved on the supporting screw, one end of the spring is connected with the supporting screw, and the other end of the spring is in contact with the connecting support.

4. The rack and pinion steering assembly lash measuring device of claim 3 wherein, A transversely-through groove is arranged on the connecting support, a third through hole is arranged on one side of the groove, a fourth threaded hole is arranged on the opposite side of the groove, and a connecting rod matched with the groove is arranged at one end of the claw.

5. The rack and pinion steering assembly lash measuring device of claim 4 wherein, A fourth through hole corresponding to the third through hole is arranged on the connecting rod.

6. The rack and pinion steering assembly lash measuring device of claim 5 wherein, A boss is arranged on the claw.

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