Multi-threaded-hole detection tool

Abstract

The invention relates to the technical field of automobile pump cover detection tools, and discloses a multi-threaded-hole detection tool which comprises a working platform and a sliding table arranged on the working platform, the working platform is provided with a supporting piece for driving the sliding table to move, the sliding table is provided with at least two bearing pieces, and a bearing space is formed between the two bearing pieces. The automobile pump cover is arranged on the bearing part; the connecting table is perpendicular to the plane where the working platform is located, a rotating shaft is rotationally connected to the connecting table, a connecting piece is arranged at one end of the rotating shaft in the direction facing the bearing space, a threaded measuring rod is arranged on the connecting piece, and a buffer limiting structure is arranged between the connecting piece and the rotating shaft; the distance between the automobile pump cover and the connecting table is changed; rigid contact force is converted into elastic buffering force through elastic deformation generated by the buffering spring, forced extrusion between the threaded measuring rod and the edge of the threaded hole is avoided, and irreversible damage such as scratch and deformation of the thread form of the threaded hole is prevented.

Description

Technical Field

[0001] This invention relates to the field of automotive pump cover inspection tools, specifically a multi-threaded hole inspection tooling. Background Technology

[0002] As a key component in the automotive power transmission system or hydraulic system, the threaded holes on both sides of the pump cover are the core structure for achieving a rigid connection between the pump cover and other components. Therefore, accurate inspection of the threaded holes on both sides of the automotive pump cover is a core quality control step in the automotive parts manufacturing process.

[0003] Currently, the main method for inspecting the threaded holes of car pump covers is to use a screw on a testing instrument. First, the car pump cover is placed on a platform and fixed. Then, the testing screw is used to rotate and inspect the threaded holes on the pump cover. However, if the testing screw is misaligned during this process, the axis of the threaded hole will not be concentric with the axis of the testing screw. It is difficult to ensure that the axis is aligned in the initial stage of screwing. During the rotation, the screw thread will be forcibly squeezed against the hole wall, causing irreversible damage. Summary of the Invention

[0004] This invention provides a multi-threaded hole inspection fixture that uses a buffer limiting structure, a threaded measuring rod, and a bearing component to work together to transform the rigid contact force into an elastic buffering force through the elastic deformation of the buffer spring. This solves the problem mentioned in the background art where the screw thread is forcibly squeezed against the hole wall, causing irreversible damage.

[0005] This invention provides the following technical solution: A multi-threaded hole inspection fixture includes a work platform and a slide table disposed on the work platform. A support member is provided on the work platform to drive the slide table to move. At least two load-bearing members are provided on the slide table, forming a load-bearing space between the two load-bearing members. A car pump cover is disposed on the load-bearing members. A connecting platform is disposed on the work platform, wherein the connecting platform is perpendicular to the plane of the work platform. A rotating shaft is rotatably connected to the connecting platform. One end of the rotating shaft is provided with a connecting member facing the load-bearing space. A threaded measuring rod is provided on the connecting member. A buffer limiting structure is provided between the connecting member and the rotating shaft to change the distance between the car pump cover and the connecting platform.

[0006] As a preferred embodiment of the present invention, the buffer limiting structure includes a sleeve fixedly connected to a rotating shaft, a slide rod slidably connected to the sleeve, a slide groove opened inside the sleeve, one end of the slide rod being slidably connected to the slide groove via a slider, a connecting member being disposed at the other end of the slide rod, and a buffer spring being disposed inside the sleeve, with both ends of the buffer spring being respectively connected to the sleeve and the slide rod.

[0007] As a preferred embodiment of the present invention, a concave block is fixedly connected to the slide, a first connecting rod is fixedly connected to the top of the concave block, a connecting plate is rotatably connected to the first connecting rod, a second connecting rod is fixedly connected to the connecting plate, and the bearing member is rotatably connected to the second connecting rod.

[0008] As a preferred embodiment of the present invention, a damping block is fixedly connected to the side wall of the concave block, the damping block is disposed between the concave block and the connecting plate, the connecting plate is in contact with the damping block, and a counterweight for adapting to the damping block is provided on the bearing member.

[0009] As a preferred embodiment of the present invention, a guide rod is fixedly connected to the support member, and a movable block is provided at the bottom of the slide table. The movable block is slidably connected to the guide rod, and the axis of the guide rod is parallel to the axis of the rotating shaft.

[0010] As a preferred embodiment of the present invention, an extension plate is provided on the connecting platform, a connecting shaft is rotatably connected to the extension plate, a driving component is fixedly connected to the connecting shaft, and an mounting component is provided on the rotating shaft. The mounting component is connected to the driving component via a transmission belt to drive the rotating shaft to rotate.

[0011] As a preferred embodiment of the present invention, the transmission belt includes a flexible ring, the driving member has a driving groove, the mounting member has a mounting groove, and the flexible ring is sleeved on the driving groove and the mounting groove.

[0012] As a preferred embodiment of the present invention, the transmission belt includes a toothed belt, the driving member is provided with a first connecting tooth, the mounting member is provided with a second connecting tooth, and the toothed belt is sleeved on the first connecting tooth and the second connecting tooth.

[0013] As a preferred embodiment of the present invention, a handle is fixedly connected to the connecting shaft. The handle is a bent and extended tubular gripping end for the operator to hold.

[0014] As a preferred embodiment of the present invention, a connecting cylinder is connected to the connecting platform, a bearing is fixedly connected inside the connecting cylinder, and the rotating shaft is mounted on the bearing.

[0015] Compared with the prior art, the present invention provides a multi-threaded hole inspection fixture, which has the following beneficial effects: 1. In this multi-threaded hole inspection fixture, the resistance felt by the handle determines whether the threaded hole is qualified. If the threaded hole has problems such as dimensional deviation or tooth shape defects, the elastic deformation generated by the buffer spring on the buffer limit structure can convert the rigid contact force into elastic buffer force, avoid the thread probe from being forcibly squeezed with the edge of the threaded hole, and prevent irreversible damage such as scratches and deformation of the threaded hole tooth shape. 2. In this multi-threaded hole inspection fixture, the connecting plate and the damping block are matched to give it friction while also facilitating the rotation of the connecting plate. In addition, the damping block made of polyurethane material has good wear resistance and elasticity, and is not easy to fail due to wear during long-term use. 3. In this multi-threaded hole inspection fixture, by selecting a toothed belt or a flexible ring-style transmission belt, power can be transmitted through tooth meshing or friction to drive the rotating shaft.

[0016] The parts of this device not covered are the same as or can be implemented using existing technology. This invention can convert rigid contact force into elastic buffer force through the elastic deformation generated by the buffer spring, so as to avoid forced compression between the thread probe and the edge of the threaded hole and prevent irreversible damage such as scratches and deformation of the threaded hole profile. Attached Figure Description

[0017] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, the elements or parts are not necessarily drawn to actual scale.

[0018] Figure 1 This is a schematic diagram of the entire invention; Figure 2 For the present invention Figure 1 Schematic diagram of part A Figure 3 This is a schematic diagram of the left connecting platform of the present invention; Figure 4 This is a schematic diagram of the right connecting platform of the present invention; Figure 5 This is a schematic diagram of the interior of the sleeve of the present invention; Figure 6 This is a schematic diagram of the interior of the carrier component of the present invention; Figure 7 This is a schematic diagram of the toothed belt of the present invention.

[0019] In the diagram: 100, working platform; 101, connecting table; 102, handle; 200, support component; 201, guide rod; 202, movable block; 300, slide table; 301, concave block; 302, first connecting rod; 303, connecting plate; 304, second connecting rod; 400, load-bearing component; 401, counterweight; 402, damping block; 500, connecting component; 501, thread measuring rod; 502, connecting... Connecting cylinder; 600, rotating shaft; 601, sleeve; 602, sliding rod; 603, slider; 604, sliding groove; 605, buffer spring; 700, extension plate; 701, connecting shaft; 702, driving component; 703, driving groove; 704, first connecting tooth; 800, mounting component; 801, mounting groove; 802, second connecting tooth; 900, transmission belt; 901, flexible ring; 902, toothed belt. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] Example: Reference Figures 1-7 A multi-threaded hole inspection fixture is disclosed. The main basic component is a working platform 100, which is the basic installation carrier. The working platform 100 is a rectangular rigid cast iron platform. Support members 200 are installed on the upper surface of the working platform 100. There are two sets of four support members 200 arranged in parallel and symmetrically. A guide rod 201 is also fixedly connected to the support member 200. The axis of the guide rod 201 is parallel to the surface of the working platform 100. A slide table 300 is also provided on the working platform 100. A movable block 202 is welded to the bottom of the slide table 300. The middle of the movable block 202 has a through hole that matches the guide rod 201. The movable block 202 is slidably connected to the guide rod 201, so that the slide table 300 can slide horizontally back and forth along the guide rod 201. The axis of the guide rod 201 is parallel to the axis of the rotating shaft 600.

[0022] Specifically, a concave block 301 is installed on the upper surface of the slide table 300. The concave block 301 has a U-shaped metal structure, and first connecting rods 302 are installed on both sides of its top. The axes of the two first connecting rods 302 are parallel to the axis of the guide rod 201. A connecting plate 303 is rotatably connected to the first connecting rods 302. The connecting plate 303 is a rectangular metal plate, and a second connecting rod 304 is installed at the end away from the first connecting rods 302. The axis of the second connecting rod 304 is parallel to the axis of the guide rod 201. The first connecting rod 302 is parallel to the axis. A bearing 400 is rotatably mounted on the second connecting rod 304. Each second connecting rod 304 is provided with a bearing 400, and the number of bearings is 2-4. This device uses 2 bearings. The bearing 400 is cylindrical with a cavity in the middle. The counterweight 401 is placed in the cavity of the bearing 400, and its outer arc surface is adapted to the outer contour of the car pump cover. A "bearing space" is formed between the two bearings 400 for placing the car pump cover to be tested.

[0023] Specifically, to ensure the stability of the bearing component 400, a damping block 402 is adhered to or snapped onto the inner wall of the concave block 301. The damping block 402 is made of polyurethane material with a high coefficient of friction, and its surface is in contact with the side wall of the connecting plate 303. For example, when the weight of the bearing component 400 is 200 grams, the total weight of the counterweight block 401 is 100 grams, so that the bearing component 400 has a certain weight, which can match the friction force generated by the damping block 402. This allows it to have friction while also facilitating the rotation of the connecting plate 303. Furthermore, this polyurethane damping block 402 also has good wear resistance and elasticity, and is not prone to failure due to wear during long-term use.

[0024] It should be explained that connecting platforms 101 are vertically welded to both ends of the working platform 100. Figure 3 and Figure 4As shown, the connecting platform 101 is a rectangular vertical plate, its surface being perpendicular to the upper surface of the working platform 100. A connecting cylinder 502 is fixed on the connecting platform 101. A deep groove ball bearing or angular contact ball bearing (not shown in the figure) is embedded inside the connecting cylinder 502. The rotating shaft 600 passes through the inner ring of the bearing, allowing the rotating shaft 600 to rotate around its own axis. One end of the rotating shaft 600 extends towards the bearing space of the slide table 300. At the end of the rotating shaft 600 facing the bearing space, at one end of the rotating shaft 600... A buffer limiting structure is also provided, specifically including a sleeve 601, which is a cylindrical metal tube. One end of the sleeve 601 is welded and fixed to the end of the rotating shaft 600, and the axis of the sleeve 601 is collinear with the axis of the rotating shaft 600. A sliding groove 604 is also provided inside the sleeve 601, which is a rectangular or arc-shaped groove formed on the inner wall of the sleeve 601. In this device, it is a rectangular groove that extends along the axial direction of the sleeve 601. Furthermore, a sliding rod 602 is slidably connected to the sleeve 601. That is to say, the horizontal movement of the sliding rod 602... The cross-section is cylindrical, and a slider 603 adapted to the slide groove 604 is installed on its circumference. The slider 603 is slidably embedded in the slide groove 604, allowing the slide rod 602 to slide back and forth along the axis of the sleeve 601. The cooperation between the slide groove 604 and the slider 603 restricts the rotation of the slide rod 602, ensuring that the slide rod 602 rotates synchronously with the sleeve 601. A buffer spring 605 is also provided inside the sleeve 601. The buffer spring 605 is a stainless steel compression spring, which is embedded inside the sleeve 601 and buffers... The two ends of the spring 605 are fixedly connected to the inner wall of the sleeve 601 and the end of the slide rod 602, respectively, so that it can provide elastic buffering force. Furthermore, a connector 500 is installed on the end of the slide rod 602 away from the sleeve 601. The connector 500 is cylindrical, and a threaded probe 501 is provided on the side facing the bearing space. The thread specification of the threaded probe 501 is completely matched with the threaded hole of the car pump cover to be tested. The size and tooth profile of the threaded hole can be judged by the engagement state of the threaded probe 501.

[0025] Specifically, an extension plate 700 is installed at the top of the connecting platform 101. The extension plate 700 is a horizontally arranged L-shaped plate with its long plate surface parallel to the working platform 100. A rotatable connecting shaft 701 is provided on the short plate surface of the extension plate 700. The axis of the connecting shaft 701 is parallel to the axis of the rotating shaft 600. A driving component 702 is also provided on the connecting shaft 701. An installation component 800 is fixed at the other end of the rotating shaft 600 away from the threaded measuring rod 501. The driving component 702 and the installation component 800 are connected by a transmission belt 900 to realize power transmission. A handle 102 is installed and fixed at the other end of the connecting shaft 701. The handle 102 is a bent and extended tubular metal component with a bending angle adapted to the operator's grip posture, making it convenient for the operator to manually apply force to rotate, so as to drive the installation component 800 to drive the rotating shaft 600 to rotate.

[0026] In the above scheme, the transmission belt 900 has two optional forms. The first is a flexible ring 901. An annular drive groove 703 is provided on the drive member 702, and an annular mounting groove 801 is provided on the mounting member 800. In this case, the transmission belt 900 is a flexible ring 901 made of rubber or silicone material that fits the drive groove 703 and the mounting groove 801. The flexible ring 901 is sleeved on the drive groove 703 and the mounting groove 801. During this process, the flexible ring 901 will be stretched, and then power will be transmitted through friction.

[0027] The second type is a toothed belt 902. When the outer periphery of the driving component 702 is provided with an annular first connecting tooth 704 and the outer periphery of the mounting component 800 is provided with an annular second connecting tooth 802, the transmission belt 900 can be a synchronous toothed belt 902 that is adapted to the tooth shape. The toothed belt 902 is sleeved on the first connecting tooth 704 and the second connecting tooth 802, and power is transmitted through tooth meshing, which can avoid slippage.

[0028] The working principle is as follows: The operator places the car pump cover to be tested into the bearing space between the two bearing members 400 on the slide table 300. The bottom of the pump cover is in contact with the arc-shaped surface of the bearing member 400. At this time, due to the weight of the pump cover itself, the bearing member 400 will drive the connecting plate 303 to rotate slightly around the first connecting rod 302. At the same time, the connecting plate 303 is in contact with the damping block 402. The rotational damping provided by the damping block 402 can keep the pump cover in a certain posture. Meanwhile, the counterweight 401 can prevent the bearing member 400 from tilting excessively, so that it has friction and also facilitates the rotation of the connecting plate 303.

[0029] Subsequently, the operator manually pushes the slide table 300. The movable block 202 at the bottom of the slide table 300 slides horizontally along the guide rod 201 on the support 200. The design of the guide rod 201 being parallel to the axis of the rotating shaft 600 ensures that the axis of the threaded hole of the car pump cover and the axis of the thread measuring rod 501 are on the same horizontal plane until the pump cover is close to the connecting table 101 and the threaded hole on one side is roughly aligned with the thread measuring rod 501. At this point, the position adjustment of the slide table 300 is completed.

[0030] Then, the operator holds handle 102 with one hand and rotates it clockwise (or counterclockwise). Handle 102 drives connecting shaft 701 to rotate around its own axis. Connecting shaft 701 synchronously drives drive component 702 to rotate. Drive component 702 transmits power to mounting component 800 through transmission belt 900 (taking toothed belt 902 as an example). Mounting component 800 drives rotating shaft 600 to rotate around its own axis. Rotating shaft 600 synchronously drives sleeve 601 to rotate. Sleeve 601 drives sliding rod 602 to rotate through the cooperation of sliding groove 604 and slider 603. Sliding rod 602 then drives connecting component 500 and threaded probe 501 to rotate synchronously. At this time, threaded probe 501 enters the threaded hole of the car pump cover in a rotating state. Specifically, when there is a deviation between the axis of the threaded probe 501 and the axis of the threaded hole in the pump cover, the end of the threaded probe 501 will first contact the edge of the threaded hole. At this time, the threaded probe 501 is in a rotating state, and the end of the threaded probe 501 will be subjected to the reaction force of the edge of the threaded hole. This reaction force will be transmitted to the end of the slide rod 602 along the axis of the slide rod 602, causing the slide rod 602 to slide towards the inside of the sleeve 601. The slider 603 slides along the slide groove 604, while compressing the buffer spring 605. The elastic deformation of the buffer spring 605 can convert the rigid contact force into an elastic buffer force, avoiding forced compression between the threaded probe 501 and the edge of the threaded hole, and preventing irreversible damage such as scratches and deformation of the threaded hole profile.

[0031] Finally, when the axis of the threaded hole in the pump cover gradually aligns with the axis of the threaded probe 501, the rotating threaded probe 501 will smoothly screw into the threaded hole. At this time, under the elastic restoring force of the buffer spring 605, the slide bar 602 slides along the slide groove 604 towards the outside of the sleeve 601 and gradually returns to the initial position. The operator continues to turn the handle 102, and the threaded probe 501 continues to screw into the threaded hole until it is screwed into the preset depth. Repeat steps 1-3 times to complete this test.

[0032] In the above process, if the size and tooth profile of the threaded hole meet the requirements, the thread test rod 501 can be smoothly screwed in. The operator can feel the resistance through the handle 102 and determine that the threaded hole is qualified. If the threaded hole has problems such as out-of-tolerance size or tooth profile defects, the thread test rod 501 will encounter abnormal resistance when screwed in. At this time, the buffer spring 605 will be compressed again to avoid excessive damage to the thread test rod 501 and the threaded hole. At the same time, the operator can determine that the threaded hole is unqualified by the change in resistance of the handle 102. Then, stop rotating, remove it and check again.

[0033] Reference Figure 1As shown, after the threaded hole on the left side of the car pump cover is inspected, the operator turns the handle 102 in the opposite direction, causing the thread probe 501 to rotate in the opposite direction and exit the inspected threaded hole. Then, the operator pushes the slide 300 to slide to the right along the guide rod 201 to adjust the position of the pump cover so that the thread probe 501 on the right side connecting platform 101 of the pump cover is aligned with the threaded hole on the right side of the car pump cover. The operation of steps 1-3 is repeated to complete the inspection of the threaded hole on the other side. The number can be set according to the actual number of threaded holes on the car pump cover, for example, 1-10 sets on the left side and 1-5 sets on the right side. Specifically, in this device, there are five sets of thread probes 501 on the left side and three sets of thread probes 501 on the right side.

[0034] In the above solution, the sleeve 601, slide rod 602 and buffer spring 605 on the buffer limiting structure work together to solve the problem of forced extrusion when the threaded hole and the axis of the thread measuring rod 501 are not concentric, thus avoiding irreversible damage to the threaded hole.

[0035] Components not described in detail in this article are existing technologies.

[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A multi-threaded hole inspection fixture, comprising a work platform (100), characterized in that, Also includes: A slide (300) is set on the work platform (100). The work platform (100) is provided with a support (200) for driving the slide (300) to move. The slide (300) has at least two load-bearing members (400), and a load-bearing space is formed between the two load-bearing members (400). The car pump cover is set on the load-bearing member (400). A connection station (101) is set on the work platform (100). The connecting platform (101) is perpendicular to the plane of the working platform (100). A rotating shaft (600) is rotatably connected to the connecting platform (101). A connector (500) is provided at one end of the rotating shaft (600) facing the bearing space. A threaded measuring rod (501) is provided on the connector (500). A buffer limiting structure is provided between the connector (500) and the rotating shaft (600) to change the distance between the car pump cover and the connecting platform (101).

2. The multi-threaded hole inspection fixture according to claim 1, characterized in that, The buffer limiting structure includes a sleeve (601) fixedly connected to a rotating shaft (600), a slide rod (602) slidably connected to the sleeve (601), a slide groove (604) provided inside the sleeve (601), one end of the slide rod (602) being slidably connected to the slide groove (604) via a slider (603), a connecting piece (500) being provided at the other end of the slide rod (602), and a buffer spring (605) being provided inside the sleeve (601), with both ends of the buffer spring (605) being connected to the sleeve (601) and the slide rod (602) respectively.

3. The multi-threaded hole inspection fixture according to claim 1, characterized in that, A concave block (301) is fixedly connected to the slide (300), a first connecting rod (302) is fixedly connected to the top of the concave block (301), a connecting plate (303) is rotatably connected to the first connecting rod (302), a second connecting rod (304) is fixedly connected to the connecting plate (303), and the bearing (400) is rotatably connected to the second connecting rod (304).

4. The multi-threaded hole inspection fixture according to claim 3, characterized in that, A damping block (402) is fixedly connected to the side wall of the concave block (301). The damping block (402) is disposed between the concave block (301) and the connecting plate (303). The connecting plate (303) is in contact with the damping block (402). A counterweight (401) for adapting to the damping block (402) is provided on the bearing member (400).

5. The multi-threaded hole inspection fixture according to claim 1, characterized in that, A guide rod (201) is fixedly connected to the support member (200), and a movable block (202) is provided at the bottom of the slide (300). The movable block (202) is slidably connected to the guide rod (201), and the axis of the guide rod (201) is parallel to the axis of the rotating shaft (600).

6. The multi-threaded hole inspection fixture according to claim 1, characterized in that, An extension plate (700) is provided on the connecting platform (101), a connecting shaft (701) is rotatably connected to the extension plate (700), a driving component (702) is fixedly connected to the connecting shaft (701), and an mounting component (800) is provided on the rotating shaft (600). The mounting component (800) is connected to the driving component (702) via a transmission belt (900) to drive the rotating shaft (600) to rotate.

7. A multi-threaded hole inspection fixture according to claim 6, characterized in that, The transmission belt (900) includes a flexible ring (901), the driving member (702) has a driving groove (703), the mounting member (800) has a mounting groove (801), and the flexible ring (901) is sleeved on the driving groove (703) and the mounting groove (801).

8. A multi-threaded hole inspection fixture according to claim 6, characterized in that, The transmission belt (900) includes a toothed belt (902), the drive member (702) is provided with a first connecting tooth (704), the mounting member (800) is provided with a second connecting tooth (802), and the toothed belt (902) is sleeved on the first connecting tooth (704) and the second connecting tooth (802).

9. A multi-threaded hole inspection fixture according to claim 6, characterized in that, A handle (102) is fixedly connected to the connecting shaft (701). The handle (102) is a bent and extended tubular gripping end for the operator to hold.

10. A multi-threaded hole inspection fixture according to claim 1, characterized in that, A connecting cylinder (502) is connected to the connecting platform (101), and a bearing is fixedly connected inside the connecting cylinder (502). The rotating shaft (600) is mounted on the bearing.

Images