EPS worm gear center distance detection device and detection method

Abstract

The present invention relates to the technical field of automobile parts, and in particular to an EPS worm gear center distance detection device and detection method, comprising a base plate (1); a worm support structure and a worm wheel support structure are respectively provided on the base plate (1); a slide rail structure and a measuring assembly are respectively provided on the worm support structure; the slide rail structure is connected to a worm shaft (2); the worm wheel support structure is connected to a worm wheel (3); the worm shaft (2) is meshed with the worm wheel (3); the measuring assembly is in contact with the worm shaft (2); the slide rail structure can adjust the vertical installation position of the worm shaft, so that the device can realize the installation and detection of worm wheels and worm shafts of different specifications, and has strong versatility; the measuring assembly measures the matching center distance of the worm shaft and the worm wheel; and can also detect the meshing accuracy of the worm shaft and the worm wheel, fully ensuring the detection accuracy and reliability.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile parts, and in particular to an EPS worm gear center distance detection device and a detection method. Background Art

[0002] C-EPS (Column-Electric Power Steering) electric power steering column, P-EPS (Pinion-Electric Power Steering) gear-type electric power steering and DP-EPS (Dual Pinion-Electric Power Steering) dual pinion electric power steering system all require a worm gear pair; when the worm gear is paired, it is inconvenient to measure the center distance between the two parts, which is not conducive to analyzing the meshing of the worm gear. Poor meshing of the worm gear can easily lead to faults such as abnormal noise; the existing detection device has low detection accuracy, and cannot be used for detection of worm gears of different specifications, and has poor versatility.

[0003] After searching, the applicant found that the Chinese patent document with publication number 206192650U disclosed a worm gear detection device on May 24, 2017, with four mounting holes and a base connecting hole on the base, and a bracket connecting hole, a support hole, an observation port, and a bearing hole on the bracket. The base and the bracket are fixedly connected through the base connecting hole and the bracket connecting hole. One end of the support shaft is provided with a retaining ring groove, and the other end is provided with a limiting platform. The retaining ring is installed in the retaining ring groove. The limit block has a load rod fixing hole and a positioning hole. The positioning column is connected to the limit block. One end of the load rod is threaded, and the threaded end of the load rod is installed in the load rod fixing hole. The bracket connecting hole corresponds to the base connecting hole. The angle between the axes of the two holes is consistent with the spatial transmission angle of the worm gear. The worm wheel and the worm form a worm gear mechanism. This device also cannot solve the above technical problems.

[0004] Therefore, in order to improve or solve at least one of the above problems, it is necessary to provide an EPS worm gear center distance detection device and detection method that can realize accurate detection of worm gears of different specifications. Summary of the invention

[0005] The object of the present invention is to provide an EPS worm gear center distance detection device and detection method which can realize accurate detection of worm gears of different specifications.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is: an EPS worm gear center distance detection device, comprising a base plate; a worm support structure and a worm wheel support structure are respectively provided on the base plate; a slide rail structure and a measuring assembly are respectively provided on the worm support structure; the slide rail structure is connected to a worm shaft; the worm wheel support structure is connected to a worm wheel; the worm shaft is meshed with the worm wheel; and the measuring assembly is abutted against the worm shaft.

[0007] The worm support structure includes a first support and a second support; the slide rail structure includes a slide rail; the slide rails are respectively arranged on the first support and the second support; a slide seat is arranged on the slide rail; and the end of the worm shaft is connected to the slide seat.

[0008] A slide groove is provided on the slide rail; a clamping groove is provided on one side of the slide seat, and a mounting plate is provided on the other side of the slide seat; the slide rail is arranged in the clamping groove; a guide tooth is provided in the clamping groove; the guide tooth is arranged in the slide groove; a top is provided on the mounting plate; a connecting hole is provided at the end of the worm shaft; the top is connected to the connecting hole.

[0009] The mounting plate is connected to a slider lock; the slider lock includes a side plate; the slide rail is arranged between adjacent side plates; a threaded hole is arranged on the side plate; a screw is arranged in the threaded hole; a handle is connected to one end of the screw, and the other end of the screw is tightly pressed against the slide rail.

[0010] The bottom plate is provided with a guide groove; the bottoms of the first bracket and the second bracket are both provided with an insert block; the insert block is arranged in the guide groove.

[0011] The first bracket includes a support rod; a mounting cross bar is provided on the top of the support rod; the measuring assembly includes a dial indicator; a mounting hole is provided on the mounting cross bar; the dial indicator includes a measuring rod; the measuring rod is connected in the mounting hole, and the detection head of the measuring rod is tightly pressed against the worm shaft.

[0012] The worm gear support structure includes a support plate; the support plate is arranged between the first support and the second support; a limiting groove is provided on the support plate; the worm gear includes a connecting shaft; the connecting shaft is arranged in the limiting groove; the worm wheel is arranged at the bottom of the worm shaft, and the worm wheel is meshed with the worm shaft.

[0013] The guide grooves are respectively arranged at the two ends of the bottom plate; the support plates are respectively arranged at the two sides of the worm gear; and the cross section of the limiting groove is V-shaped.

[0014] A detection method of the EPS worm gear center distance detection device comprises the following steps:

[0015] S1: Install the worm wheel on the support plate; install the worm shaft on the top; adjust the height of the worm shaft so that the worm shaft meshes with the worm wheel;

[0016] S2: Measure the matching center distance between the worm shaft and the worm wheel.

[0017] The S1 includes:

[0018] S11: Connecting the two ends of the worm shaft to the top respectively; sliding the slide seat on the slide rail to adjust the vertical height of the worm shaft; turning the handle to lock the slide seat;

[0019] The S2 includes:

[0020] S21: Use a height gauge to measure the matching center distance between the worm shaft and the worm wheel; rotate the worm wheel and use a dial indicator to detect the meshing accuracy of the worm shaft and the worm wheel.

[0021] The beneficial effects of this application are:

[0022] The present application is provided with a worm support structure, on which a slide rail structure is provided; both ends of the worm shaft are connected to the slide rail structure, so that the vertical installation position of the worm shaft can be adjusted, and the center distance detection of worm wheels of different diameters can be adapted; the worm support structure comprises a first support and a second support; an insert block is provided at the bottom of the first support and the second support; the insert block cooperates with the guide groove on the bottom plate to adjust the distance between the first support and the second support, so that the installation detection of worm shafts of different sizes can be realized; a support plate is provided on the bottom plate, and a V-shaped limit groove is provided on the support plate, so that the installation of worm wheels of different specifications can be realized; the present device can realize the installation and detection of worm wheels and worm shafts of different specifications, and has strong versatility.

[0023] The present application can use a height gauge to measure the matching center distance between the worm shaft and the worm wheel; at the same time, the staff rotates the worm wheel and can detect the meshing accuracy of the worm shaft and the worm wheel through a dial indicator, fully ensuring the accuracy and reliability of the detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The specific embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings, wherein:

[0025] Figure 1 This is a structural schematic diagram of the EPS worm gear center distance detection device.

[0026] Figure 2 This is a schematic diagram of the working status of the EPS worm gear center distance detection device.

[0027] Figure 3This is a schematic diagram of the structure of the slide of the EPS worm gear center distance detection device.

[0028] The marks in the above figure are:

[0029] The markings in the figure are:

[0030] 1. Bottom plate, 101. Guide groove,

[0031] 2. Worm shaft, 201, connecting hole,

[0032] 3. Worm gear, 301, connecting shaft,

[0033] 4. First bracket, 401. Support rod, 402. Mounting cross bar, 403. Mounting hole,

[0034] 5. Second bracket, 501, plug block,

[0035] 6. Slide rail, 601. Slide seat, 602. Slide groove, 603. Slot, 604. Mounting plate, 605. Guide gear, 606. Top,

[0036] 7. Slider lock, 701. Side plate, 702. Threaded hole, 703. Screw, 704. Handle,

[0037] 8. Dial indicator, 801, measuring rod,

[0038] 9. Support plate, 901. Limiting groove. DETAILED DESCRIPTION

[0039] The specific implementation methods of the present invention are further explained in detail below by describing the embodiments with reference to the accompanying drawings, with the aim of helping those skilled in the art to have a more complete, accurate and in-depth understanding of the inventive concept and technical solution of the present invention and facilitating their implementation.

[0040] Figure 1-2 The EPS worm gear center distance detection device shown includes a base plate 1; a worm support structure and a worm wheel support structure are respectively provided on the base plate 1; a slide rail structure and a measuring assembly are respectively provided on the worm support structure; the slide rail structure is connected to a worm shaft 2; the worm wheel support structure is connected to a worm wheel 3; the worm shaft 2 is meshed with the worm wheel 3; and the measuring assembly abuts against the worm shaft 2.

[0041] A slide rail structure is provided on the worm support structure; both ends of the worm shaft 2 are connected to the slide rail structure, so that the vertical installation position of the worm shaft 2 can be adjusted, and the center distance detection of worm wheels 3 with different diameters can be adapted; this enables the device to realize the installation and detection of worm wheels 3 and worm shafts 2 of different specifications, and has strong versatility; the measuring component measures the matching center distance of the worm shaft 2 and the worm wheel 3; and at the same time, the meshing accuracy of the worm shaft 2 and the worm wheel 3 can be detected, fully ensuring the accuracy and reliability of the detection.

[0042] The worm support structure includes a first support 4 and a second support 5 ; the slide rail structure includes a slide rail 6 ; the slide rail 6 is respectively arranged on the first support 4 and the second support 5 ; a slide seat 601 is arranged on the slide rail 6 ; and the end of the worm shaft 2 is connected to the slide seat 601 .

[0043] The first bracket 4 and the second bracket 5 are both fixedly connected with a slide rail 6 ; the slide rail 6 is vertically arranged; the slide seat 601 is connected to the slide rail 6 and can slide flexibly along the slide rail 6 ; the end of the worm shaft 2 is fixedly connected to the slide seat 601 .

[0044] like Figure 3 As shown, a slide groove 602 is provided on the slide rail 6; a slot 603 is provided on one side of the slide seat 601, and a mounting plate 604 is provided on the other side of the slide seat 601; the slide rail 6 is arranged in the slot 603; a guide tooth 605 is provided in the slot 603; the guide tooth 605 is arranged in the slide groove 602; a top point 606 is provided on the mounting plate 604; a connecting hole 201 is provided at the end of the worm shaft 2; and the top point 606 is connected to the connecting hole 201.

[0045] The guide teeth 605 are respectively arranged on the inner walls on both sides of the slot 603; the slide 601 is connected to the slide rail 6 through the slot 603, and the guide teeth 605 are connected in the slide groove 602, so that the slide 601 can be limited and guided on the slide rail 6, and the slide 601 can slide flexibly along the slide rail 6; the slide 601 is connected to the mounting plate 604 by bolts; the mounting plate 604 is fixedly connected with a top 606; both ends of the worm shaft 2 are provided with connecting holes 201, and the top 606 is inserted into the connecting hole 201, so that the worm shaft 2 can be fixed on the slide 601, so that the vertical installation position of the worm shaft 2 can be adjusted.

[0046] The mounting plate 604 is connected to the slider lock 7; the slider lock 7 includes a side plate 701; the slide rail 6 is arranged between adjacent side plates 701; a threaded hole 702 is provided on the side plate 701; a screw rod 703 is provided in the threaded hole 702; one end of the screw rod 703 is connected to the handle 704, and the other end of the screw rod 703 is tightly pressed against the slide rail 6.

[0047] The slider lock 7 is a U-shaped structure; side plates 701 are provided on both sides of the slider lock 7; the slider lock 7 is arranged at the bottom of the slide seat 601, and the slider lock 7 is fixedly connected to the mounting plate 604; the screw 703 is fixedly connected to the handle 704; by rotating the handle 704, the screw 703 moves axially along the threaded hole 702, and the screw 703 is pressed against the side of the slide rail 6, so that the locking operation of the slider lock 7 and the slide seat 601 can be realized.

[0048] A guide groove 101 is provided on the bottom plate 1 ; an insert block 501 is provided at the bottom of each of the first bracket 4 and the second bracket 5 ; and the insert block 501 is arranged in the guide groove 101 .

[0049] The guide groove 101 is a through groove; the guide grooves 101 are respectively arranged at both ends of the bottom plate 1; the bottoms of the first bracket 4 and the second bracket 5 are fixedly connected with an insert block 501; the insert block 501 is inserted into the guide groove 101 and can slide in the guide groove 101, so as to adjust the distance between the first bracket 4 and the second bracket 5.

[0050] The first bracket 4 includes a support rod 401; a mounting cross bar 402 is provided on the top of the support rod 401; the measuring assembly includes a dial indicator 8; a mounting hole 403 is provided on the mounting cross bar 402; the dial indicator 8 includes a measuring rod 801; the measuring rod 801 is connected to the mounting hole 403, and the detection head of the measuring rod 801 is tightly pressed against the worm shaft 2.

[0051] The first bracket 4 is an L-shaped structure; the mounting cross bar 402 and the support rod 401 are an integral structure; the mounting hole 403 is a through hole, and the mounting hole 403 is arranged at the end of the mounting cross bar 402 away from the support rod 401; the measuring rod 801 of the dial indicator 8 is inserted into the mounting hole 403, so as to fix the dial indicator 8; the detection head of the measuring rod 801 is tightly pressed against the worm shaft 2, and when the meshing accuracy of the worm shaft 2 and the worm wheel 3 is not high, the detection head will be lifted or relaxed. At this time, the index change of the dial indicator 8 can be manually observed to detect whether the meshing accuracy of the worm shaft 2 and the worm wheel 3 is qualified.

[0052] The worm gear support structure includes a support plate 9; the support plate 9 is arranged between the first bracket 4 and the second bracket 5; a limiting groove 901 is provided on the support plate 9; the worm gear 3 includes a connecting shaft 301; the connecting shaft 301 is arranged in the limiting groove 901; the worm gear 3 is arranged at the bottom of the worm shaft 2, and the worm gear 3 is meshed with the worm shaft 2.

[0053] Two support plates 9 are provided between the first bracket 4 and the second bracket 5; the support plate 9 is fixedly connected to the base plate 1; the limiting groove 901 is a V-shaped groove, and the limiting groove 901 is provided at the top of the support plate 9, and the connecting shaft 301 is provided in the limiting groove 901, which can realize stable fixation of the worm gear 3.

[0054] The guide grooves 101 are respectively arranged at both ends of the bottom plate 1; the support plates 9 are respectively arranged at both sides of the worm gear 3; and the cross section of the limiting groove 901 is V-shaped.

[0055] A detection method for an EPS worm gear center distance detection device comprises the following steps:

[0056] S1: Install the worm wheel 3 on the support plate 9; install the worm shaft 2 on the top 606; adjust the height of the worm shaft 2 so that the worm shaft 2 is meshed with the worm wheel 3;

[0057] S2: Measure the center distance between the worm shaft 2 and the worm wheel 3.

[0058] In S1, the worm wheel 3 is first mounted on the support plate 9 on the base plate 1, so as to achieve stable installation of the worm wheel 3 on the device; then the two ends of the worm shaft 2 are stably mounted on the slide 601 through the top 606, so as to adjust the height of the worm shaft 2 so that the worm shaft 2 and the worm wheel 3 are meshed; in S2, the matching center distance of the worm shaft 2 and the worm wheel 3 is measured.

[0059] S1 includes:

[0060] S11: Connect the two ends of the worm shaft 2 to the top 606 respectively; slide the slide 601 on the slide rail 6 to adjust the vertical height of the worm shaft 2; turn the handle 704 to lock the slide 601;

[0061] S2 includes:

[0062] S21: Use a height gauge to measure the matching center distance between the worm shaft 2 and the worm wheel 3; rotate the worm wheel 3 and use a dial indicator 8 to check the meshing accuracy of the worm shaft 2 and the worm wheel 3.

[0063] In S21, the staff manually measures the matching center distance between the worm shaft 2 and the worm wheel 3 using a height gauge; then drives the worm shaft 2 or the worm wheel 3 to make the worm shaft 2 and the worm wheel 3 rotate, and observes the index change of the dial indicator 8 to detect whether the meshing accuracy of the worm shaft 2 and the worm wheel 3 is qualified.

[0064] The specific workflow of the present invention is as follows:

[0065] First, install the worm wheel 3 on the support plate 9 on the base plate 1, so as to achieve stable installation of the worm wheel 3 on the device; then stably install the two ends of the worm shaft 2 on the slide 601 through the top 606, so as to adjust the height of the worm shaft 2 so that the worm shaft 2 and the worm wheel 3 are meshed; the staff manually measures the matching center distance of the worm shaft 2 and the worm wheel 3 by using a height gauge; then drive the worm shaft 2 or the worm wheel 3 so that the worm shaft 2 and the worm wheel 3 are in a rotating state, and observe the index change of the dial indicator 8 to detect whether the meshing accuracy of the worm shaft 2 and the worm wheel 3 is qualified.

[0066] The present invention is described above by way of example in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-mentioned methods. As long as various non-substantial improvements are made using the method concept and technical solution of the present invention; or the above concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. An EPS worm gear center distance detection device, characterized in that: The invention comprises a base plate (1); a worm support structure and a worm wheel support structure are respectively provided on the base plate (1); a slide rail structure and a measuring assembly are respectively provided on the worm support structure; the slide rail structure is connected to a worm shaft (2); the worm wheel support structure is connected to a worm wheel (3); the worm shaft (2) is meshed with the worm wheel (3); and the measuring assembly is in contact with the worm shaft (2).

2. The EPS worm gear center distance detection device according to claim 1, characterized in that: The worm support structure comprises a first support (4) and a second support (5); the slide rail structure comprises a slide rail (6); the slide rail (6) is respectively arranged on the first support (4) and the second support (5); a slide seat (601) is arranged on the slide rail (6); and the end of the worm shaft (2) is connected to the slide seat (601).

3. The EPS worm gear center distance detection device according to claim 2, characterized in that: The slide rail (6) is provided with a slide groove (602); a clamping groove (603) is provided on one side of the slide seat (601), and a mounting plate (604) is provided on the other side of the slide seat (601); the slide rail (6) is arranged in the clamping groove (603); a guide tooth (605) is provided in the clamping groove (603); the guide tooth (605) is arranged in the slide groove (602); a top point (606) is provided on the mounting plate (604); a connecting hole (201) is provided at the end of the worm shaft (2); and the top point (606) is connected to the connecting hole (201).

4. The EPS worm gear center distance detection device according to claim 3, characterized in that: The mounting plate (604) is connected to a slider lock (7); the slider lock (7) comprises a side plate (701); the slide rail (6) is arranged between adjacent side plates (701); a threaded hole (702) is arranged on the side plate (701); a screw rod (703) is arranged in the threaded hole (702); one end of the screw rod (703) is connected to a handle (704), and the other end of the screw rod (703) is tightly pressed against the slide rail (6).

5. An EPS worm gear center distance detection device according to any one of claims 2 to 4, characterized in that: A guide groove (101) is provided on the bottom plate (1); an insert block (501) is provided at the bottom of each of the first bracket (4) and the second bracket (5); and the insert block (501) is arranged in the guide groove (101).

6. The EPS worm gear center distance detection device according to claim 5, characterized in that: The first bracket (4) comprises a support rod (401); a mounting cross bar (402) is provided on the top of the support rod (401); the measuring assembly comprises a dial indicator (8); a mounting hole (403) is provided on the mounting cross bar (402); the dial indicator (8) comprises a measuring rod (801); the measuring rod (801) is connected to the mounting hole (403), and a detection head of the measuring rod (801) is tightly pressed against the worm shaft (2).

7. The EPS worm gear center distance detection device according to claim 6, characterized in that: The worm gear support structure comprises a support plate (9); the support plate (9) is arranged between the first support (4) and the second support (5); a limiting groove (901) is provided on the support plate (9); the worm gear (3) comprises a connecting shaft (301); the connecting shaft (301) is arranged in the limiting groove (901); the worm gear (3) is arranged at the bottom of the worm shaft (2), and the worm gear (3) is meshed with the worm shaft (2).

8. The EPS worm gear center distance detection device according to claim 7, characterized in that: The guide grooves (101) are respectively arranged at the two ends of the bottom plate (1); the support plates (9) are respectively arranged at the two sides of the worm wheel (3); and the cross section of the limiting groove (901) is V-shaped.

9. A detection method for the EPS worm gear center distance detection device according to any one of claims 1 to 8, characterized in that: The following steps are involved: S1: Install the worm wheel (3) on the support plate (9); install the worm shaft (2) on the top (606); adjust the height of the worm shaft (2) so that the worm shaft (2) is meshed with the worm wheel (3); S2: Measure the matching center distance between the worm shaft (2) and the worm wheel (3).

10. The detection method according to claim 9, characterized in that: The S1 includes: S11: Connecting the two ends of the worm shaft (2) to the top (606) respectively; sliding the slide seat (601) on the slide rail (6) to adjust the vertical height of the worm shaft (2); turning the handle (704) to lock the slide seat (601); The S2 includes: S21: using a height gauge to measure the matching center distance between the worm shaft (2) and the worm wheel (3); rotating the worm wheel (3), and detecting the meshing accuracy between the worm shaft (2) and the worm wheel (3) using a dial indicator (8).

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