Automobile steering device tooth direction distance testing fixture

Abstract

The utility model relates to the technical field of automobile steering devices, in particular to an automobile steering device tooth direction distance testing fixture, which comprises a bottom plate, a first cavity and a second cavity are arranged in the bottom plate, a measuring assembly is arranged in the second cavity, a sliding chute is arranged at the upper end of a measuring plate, first scales are arranged on the outer wall of the measuring plate, and a second scale is arranged on the outer wall of the measuring plate. A measuring rod is inserted into the middle end of the sliding groove. When the tooth direction distance needs to be measured and calculated, the measuring rod is inserted between the sliding grooves, the measuring plate slides downwards along the sliding grooves until the lower end of the measuring rod makes contact with the upper end of the gear to be measured, the distance from the lower end face of the measuring rod to the upper end face of the ball screw sleeve is measured and calculated through the first scales, then the width of the rack to be measured is subtracted, and the diameter length of the gear to be measured is obtained. And dividing the width of the rack to be measured by two and adding the radius length of the gear to be measured to obtain the tooth direction distance between the center line of the gear and the center line of the rack.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of automobile steering gear, especially relates to a distance gauge for automobile steering gear tooth direction. BACKGROUND

[0002] The steering gear is also named steering machine or direction machine, and it is the most important component in the steering system, and its function is to increase the force transmitted to the steering transmission mechanism by the steering wheel and change the transmission direction of the force, and the gear rack steering gear is the most common steering gear, and the basic structure is a pair of meshing pinion gears and a rack, when the steering shaft drives the pinion gear to rotate, the rack moves linearly, and the rack directly drives the tie rod to make the steered wheels steer, and the gear rack steering gear has the advantages of simple structure, low cost, sensitive steering and small size, and is widely applied to automobiles.

[0003] The distance between the gear center line and the rack center line is an important design parameter, and is also called the automobile steering gear tooth direction distance, and the automobile steering gear tooth direction distance influences the overall layout and performance of the steering gear, but the current tooth direction distance detection is usually measured by manually using a measuring scale, and the detection result is relatively inaccurate due to the influence of hand shaking during the measurement process. UTILITY MODEL CONTENT

[0004] In order to overcome the defects of the prior art as described above, the present inventors have made in-depth research, and after a lot of creative labor, the utility model is completed.

[0005] Specifically, the technical problem to be solved by the utility model is to provide a distance gauge for automobile steering gear tooth direction, so as to solve the technical problem that the current tooth direction distance detection is usually measured by manually using a measuring scale, and the detection result is relatively inaccurate due to the influence of hand shaking during the measurement process.

[0006] In order to solve the above technical problems, the utility model provides the following technical scheme:

[0007] The utility model provides an automobile steering gear tooth direction distance testing fixture, including the bottom plate, the first cavity and the second cavity are set up in the bottom plate, the second cavity is equipped with the measurement subassembly, the measurement subassembly includes the motor fixed in the second cavity, the motor output end is connected with the two -way screw rod, the two -way screw rod outer wall is equipped with two groups of ball nut that are symmetrical to each other, the ball nut upper end is equipped with the measuring plate, the measuring plate upper end is equipped with the sliding slot, the measuring plate outer wall is equipped with the first scale, the sliding slot middle end is inserted with the measuring rod, the second cavity is located two -way screw rod upper end and is equipped with the sliding rod, the sliding rod outer wall is equipped with the sleeve, the sleeve upper end front and back two sides are fixed with two groups of fixed blocks that are symmetrical to each other, the fixed block middle end is inserted with the locking bolt, the bottom plate upper end surface one side is equipped with the drive assembly, the drive assembly includes the toothed rack of being measured between two groups of fixed blocks, the toothed rack upper end is equipped with the gear of being measured, the bottom plate upper end is equipped with the second scale close to the second cavity one side.

[0008] As an improved technical solution, the ball nut is movably inserted into the inner wall of the second cavity, the upper end of the ball nut is movably sleeved on the outer end of the sliding rod, and the two-way screw rod is rotatably connected to the inner wall of the second cavity away from the motor.

[0009] As an improved technical solution, the measuring rod is movably inserted into the sliding slot, the sleeve is movably sleeved on the outer wall of the sliding rod, the sleeve is movably inserted into the second cavity, and the locking bolt is threadedly inserted into the middle end of the fixed block.

[0010] As an improved technical solution, the drive assembly further includes a connecting shaft fixed to one end of the gear to be measured, a connecting sleeve movably sleeved on the outer wall of the connecting shaft, the connecting sleeve being fixedly connected to the bottom plate at the lower end, a three-jaw chuck connected to the end of the connecting shaft away from the gear to be measured, a drive gear connected to the end of the three-jaw chuck away from the connecting sleeve, a drive rack provided at the lower end of the drive gear, and the drive gear and the drive rack being meshed with each other.

[0011] As an improved technical solution, the fixed plates are fixed to the outer wall of the drive rack on both sides of the upper end.

[0012] As an improved technical solution, the connecting frame is fixed to one side of the outer wall of the bottom plate, the air cylinder is provided at the upper end of the connecting frame, and the air cylinder is fixedly connected to one end of the drive rack at the extended end.

[0013] After adopting the above technical scheme, the utility model has the beneficial effects that:

[0014] The utility model discloses, when needing to measure and calculate the tooth direction distance, the measuring rod is inserted between the sliding slot, and the measuring plate slides down along the sliding slot until the lower end of the measuring rod and the upper end of the gear to be measured contact, the distance from the lower end surface of the measuring rod to the upper end surface of the ball screw is measured and calculated through the first scale, then the width of the rack to be measured is subtracted, that is the diameter length of the gear to be measured, then the width of the rack to be measured is divided by two and then the length of the radius of the gear to be measured is added, that is the tooth direction distance between the gear center line and the rack center line. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to make the technical scheme of the embodiments of the utility model clearer, the following will briefly introduce the drawings needed to be used in the embodiment description, obviously, the drawings in the following description are only some embodiments of the utility model, and for the ordinary skilled in the art, other drawings can also be obtained according to these drawings without the creative labor. Among them:

[0016] Figure 1 It is the overall three-dimensional structure schematic diagram of the utility model car steering gear tooth direction distance gauge.

[0017] Figure 2 It is the overall front view part cross section structure schematic diagram of the utility model car steering gear tooth direction distance gauge.

[0018] Figure 3 It is the measuring assembly three-dimensional structure schematic diagram of the utility model car steering gear tooth direction distance gauge.

[0019] Figure 4 It is the driving assembly three-dimensional structure schematic diagram of the utility model car steering gear tooth direction distance gauge.

[0020] Explanation of the drawings:

[0021] 1, bottom plate, 2, first cavity, 3, second cavity, 4, measuring assembly, 401, motor, 402, bidirectional screw rod, 403, ball screw, 404, sliding rod, 405, measuring plate, 406, sliding slot, 407, first scale, 408, measuring rod, 409, sliding sleeve, 410, fixed block, 411, locking bolt, 5, driving assembly, 51, rack to be measured, 52, gear to be measured, 53, connecting shaft, 54, connecting sleeve, 55, three-jaw chuck, 56, driving gear, 57, driving rack, 58, fixed plate, 59, air cylinder, 6, connecting frame, 7, second scale. DETAILED DESCRIPTION

[0022] Clearly, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0023] It should be noted that all directional indications (such as upper, lower, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative positional relationship, movement condition, etc. between components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the directional indications will also change accordingly.

[0024] Meanwhile, "and / or" or "and / or" appearing throughout the text means including three schemes, taking "A and / or B" as an example, including A scheme, or B scheme, or A and B schemes are satisfied at the same time.

[0025] In addition, the description of "first", "second" and the like in the present application is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of ordinary skill in the art, when the combination of technical solutions appears contradictory or cannot be realized, it should be considered that the combination of technical solutions does not exist, nor within the scope of protection required by the present application.

[0026] For example, Figure 1 and Figure 4As shown, the embodiment provides a kind of automobile steering gear tooth distance gauge, including bottom plate 1, first cavity 2 and second cavity 3 are set in bottom plate 1, second cavity 3 is equipped with measuring assembly 4, measuring assembly 4 includes motor 401 fixedly arranged in second cavity 3, motor 401 output end is connected with two-way screw rod 402, two-way screw rod 402 outer wall is equipped with two groups of ball nut 403 symmetrical to each other, measuring plate 405 is fixedly arranged on ball nut 403 upper end, sliding slot 406 is formed on the upper end of measuring plate 405, first scale 407 is arranged on the outer wall of measuring plate 405, measuring rod 408 is inserted in the middle end of sliding slot 406, second cavity 3 is fixedly arranged on the upper end of two-way screw rod 402 and is equipped with sliding rod 404, sliding rod 404 outer wall is equipped with sliding sleeve 409, two groups of fixed blocks 410 symmetrical to each other are fixedly arranged on the upper end of sliding sleeve 409, locking bolt 411 is inserted in the middle end of fixed block 410, driving assembly 5 is arranged on the one side of the upper end of bottom plate 1, driving assembly 5 includes the tooth bar 51 to be measured between two groups of fixed blocks 410, the tooth gear 52 to be measured is arranged on the upper end of tooth bar 51 to be measured, second scale 7 is arranged on the side of the upper end of bottom plate 1 close to second cavity 3.

[0027] Ball nut 403 is movably inserted in the inner wall of second cavity 3, and the upper end of ball nut 403 is movably sleeved on the outer end of sliding rod 404, and the end of two-way screw rod 402 away from motor 401 is rotatably connected with the inner wall of second cavity 3.

[0028] Measuring rod 408 is movably inserted in sliding slot 406, sliding sleeve 409 is movably sleeved on the outer wall of sliding rod 404, and sliding sleeve 409 is movably inserted in second cavity 3, and locking bolt 411 is threadedly inserted in the middle end of fixed block 410.

[0029] Driving assembly 5 further includes connecting shaft 53 fixedly arranged at one end of tooth gear 52 to be measured, connecting sleeve 54 is movably sleeved on the outer wall of connecting shaft 53, and the lower end of connecting sleeve 54 is fixedly connected with bottom plate 1, three-jaw chuck 55 is connected with the end of connecting shaft 53 away from tooth gear 52 to be measured, driving gear 56 is connected with the end of three-jaw chuck 55 away from connecting sleeve 54, driving gear 56 is provided with driving rack 57 at the lower end, and driving gear 56 and driving rack 57 are engaged with each other.

[0030] Fixed plate 58 is fixedly arranged on the outer wall of driving rack 57 at the upper end, and driving rack 57 is movably inserted in the middle end of two groups of fixed plates 58.

[0031] Connecting frame 6 is fixedly arranged on the outer wall of bottom plate 1, air cylinder 59 is arranged on the upper end of connecting frame 6, and the extension end of air cylinder 59 is fixedly connected with one end of driving rack 57.

[0032] The measured rack 51 to be detected is placed between the two groups of fixed blocks 410, and the measured rack 51 is overlapped on the upper end of the sliding sleeve 409. Then the two groups of locking bolts 411 are turned to lock the measured rack 51 between the fixed blocks 410. Then the motor 401 is started to drive the bidirectional lead screw 402 to rotate, and the bidirectional lead screw 402 drives the ball bearing sleeve 403 to slide along the bidirectional lead screw 402. When one of the measuring plates 405 and the measured rack 51 touch, the measuring plate 405 pushes the measured rack 51 to drive the sliding sleeve 409 to slide along the sliding rod 404 until the other end of the measured rack 51 touches the second measuring plate 405. At this time, the measured rack 51 is located between the two measuring plates 405. Then the side in contact with the measured rack 51 of the measuring plate 405 is aligned with the second scale 7 arranged on the bottom plate 1 to measure the length of the measured rack 51. The lower end surface of the first scale 407 and the upper end surface of the sliding sleeve 409 are in the same horizontal plane, so that the width of the measured rack 51 can be measured through the sliding groove 406, so as to measure whether the length and width of the measured rack 51 meet the quality requirements. Then the connecting shaft 53 of the measured gear 52 to be detected is inserted into the three-jaw chuck 55 through the connecting sleeve 54, and the three-jaw chuck 55 is locked. At this time, the motor 401 is reversed to drive the two ball bearing sleeves 403 to move away from each other, and the measuring plate 405 is moved to the two ends of the second cavity 3. Then the cylinder 59 is started to push the cylinder 59 forward, and the extension speed of the cylinder 59 is kept unchanged. The cylinder 59 drives the driving rack 57 to slide along the inner wall of the two fixed plates 58. Since the driving rack 57 and the driving gear 56 are meshed with each other, the driving gear 56 rotates. The driving gear 56 rotates to drive the measured gear 52 to rotate through the fixation of the three-jaw chuck 55. In the process of rotating the measured gear 52, the sliding sleeve 409 is driven to slide along the sliding rod 404 by the measured rack 51. The time required for the sliding sleeve 409 to slide to the maximum distance along the sliding rod 404 is measured by the second scale 7. The maximum distance is the length of the measured rack 51. Whether the gear ratio between the measured rack 51 and the measured gear 52 meets the requirements is measured. When the tooth distance needs to be measured, the measuring rod 408 is inserted between the sliding grooves 406, and the measuring plate 405 slides downward along the sliding groove 406 until the lower end of the measuring rod 408 contacts the upper end of the measured gear 52. The distance between the lower end surface of the measuring rod 408 and the upper end surface of the ball bearing sleeve 403 is measured by the first scale 407. Then the width of the measured rack 51, that is, the diameter of the measured gear 52, is subtracted. Then the width of the measured rack 51 is divided by two, and the length of the radius of the measured gear 52, that is, the tooth distance between the gear center line and the rack center line, is added.

[0033] It should be understood that the use of these embodiments is by way of illustration only and is not intended to limit the scope of the present application. In addition, it should also be understood that, after reading the technical content of the present application, those skilled in the art can make various modifications, modifications and / or variations to the present application, and all of these equivalent forms also fall within the protection scope defined by the claims attached to the present application.

Claims

1. A vehicle steering gear tooth distance measuring tool, comprising a base plate (1), characterized in that: The bottom plate (1) is provided with a first cavity (2) and a second cavity (3), the second cavity (3) is provided with a measuring assembly (4), the measuring assembly (4) comprises a motor (401) fixedly arranged in the second cavity (3), the output end of the motor (401) is connected to a bidirectional screw rod (402), the outer wall of the bidirectional screw rod (402) is provided with two mutually symmetrical groups of ball screw sleeves (403), the upper end of the ball screw sleeve (403) is fixed with a measuring plate (405), the upper end of the measuring plate (405) is provided with a slide groove (406), the outer wall of the measuring plate (405) is provided with a first scale (407), the middle end of the slide groove (406) is provided with a measuring rod (408), and the upper end of the measuring plate (405) is provided with a first scale (407). 08), the second cavity (3) is located at the upper end of the bidirectional screw rod (402) and is fixed with a slide rod (404), the outer wall of the slide rod (404) is provided with a slide sleeve (409), and two groups of mutually symmetrical fixed blocks (410) are fixed on the front and rear sides of the upper end of the slide sleeve (409), and a locking bolt (411) is inserted into the middle end of the fixed block (410), and a driving component (5) is provided on one side of the upper end surface of the base plate (1), and the driving component (5) includes a rack to be measured (51) arranged between the two groups of the fixed blocks (410), and a gear to be measured (52) is provided on the upper end of the rack to be measured (51), and a second scale (7) is provided on the side of the upper end of the base plate (1) close to the second cavity (3).

2. The automobile steering gear tooth distance measuring tool according to claim 1, characterized in that: The ball screw sleeve (403) is movably inserted into the inner wall of the second cavity (3), the upper end of the ball screw sleeve (403) is movably sleeved on the upper end of the outer wall of the slide rod (404), and the end of the bidirectional screw rod (402) away from the motor (401) is rotatably connected to the inner wall of the second cavity (3).

3. The automobile steering gear tooth distance measuring tool according to claim 1, characterized in that: The measuring rod (408) is movably inserted into the sliding groove (406), the sliding sleeve (409) is movably sleeved on the outer wall of the sliding rod (404), the sliding sleeve (409) is movably inserted into the second cavity (3), and the locking bolt (411) is threadedly inserted into the middle end of the fixing block (410).

4. The automobile steering gear tooth distance measuring tool according to claim 1, characterized in that: The driving assembly (5) further comprises a connecting shaft (53) fixedly arranged at one end of the gear to be measured (52); a connecting sleeve (54) is movably sleeved on the outer wall of the connecting shaft (53); the lower end of the connecting sleeve (54) is fixedly connected to the bottom plate (1); the end of the connecting shaft (53) away from the gear to be measured (52) is connected to a three-jaw chuck (55); the end of the three-jaw chuck (55) away from the connecting sleeve (54) is connected to a driving gear (56); a driving rack (57) is provided at the lower end of the driving gear (56); the driving gear (56) and the driving rack (57) are meshed with each other.

5. The automobile steering gear tooth distance measuring tool according to claim 4, characterized in that: The upper end is located on both sides of the outer wall of the driving rack (57) and fixed with fixed plates (58), and the driving rack (57) is movably inserted in the middle ends of the two groups of fixed plates (58).

6. The automobile steering gear tooth distance measuring tool according to claim 4, characterized in that: A connecting frame (6) is fixedly provided on one side of the outer wall of the base plate (1), a cylinder (59) is provided on the upper end of the connecting frame (6), and an extended end of the cylinder (59) is fixedly connected to one end of the driving rack (57).

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