Measuring tool for detecting depth of inner inclined surface of inner pull rod of automobile

Abstract

The invention relates to the technical field of automobile part detection, in particular to a measuring tool for detecting the depth of an inner inclined plane of an automobile inner pull rod, which comprises a dial type depth gauge main body, and the inner wall of the dial type depth gauge main body is rotatably connected with an adjusting assembly. Two positioning assemblies used for abutting against the inner wall of an automobile inner pull rod measuring hole are symmetrically arranged on the adjusting assembly, a protective cover is arranged at an opening in the middle of the bottom end of the dial type depth gauge body in a sliding fit mode, and a transmission mechanism is rotationally connected to the inner wall of the dial type depth gauge body. The inner wall of the dial type depth gauge body is provided with fan blades used for cleaning the inner wall of the automobile inner pull rod measuring hole. According to the dial type depth gauge, the fan blades are arranged in the dial type depth gauge body, particulate matter in a hole can be blown out, it is ensured that the measuring needle can make smooth contact with the inclined face of the inner pull rod, interference of the particulate matter on the measuring needle is reduced, measurement errors caused by the particulate matter are avoided, and the depth measurement precision is improved.

Description

Technical Field

[0001] This invention relates to the field of automotive parts testing technology, and in particular to a measuring tool for measuring the depth of the inner inclined surface of an automotive tie rod. Background Technology

[0002] Measuring the depth of the inner bevel of a car tie rod is a delicate process that typically requires specialized measuring tools to ensure accuracy. The inner bevel of the tie rod generally has a specific geometry, and the measuring tool must be precisely adapted to this structure when measuring the depth.

[0003] The prior art publication number CN206177211U provides a measuring tool for detecting the depth of the inner inclined surface of an automotive tie rod. This technology is simple in structure, easy to operate, and practical, and process personnel and operators can perform measurements on-site.

[0004] Existing technology involves inserting a dial indicator into the test hole of an automotive tie rod to measure depth. However, due to the presence of particulate matter on the inner wall of the test hole during manufacturing and storage, and the lack of pre-measurement treatment of this inner wall, the dial indicator probe is easily obstructed or interfered with by particles during insertion. The probe may not fully contact the true bottom of the inner slope. Particles may also cause premature contact, resulting in inflated readings or measurement fluctuations. This leads to decreased depth measurement accuracy and unreliable results.

[0005] In summary, the existing technology lacks a technique for particulate matter pretreatment when measuring the depth of tie rods inside automobiles. Summary of the Invention

[0006] The purpose of this invention is to address the shortcomings of the prior art by providing a measuring tool for detecting the depth of the inner inclined surface of an automotive tie rod.

[0007] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a measuring tool for detecting the depth of the inclined surface inside a car interior tie rod, comprising a needle-type depth gauge body, an adjustment component rotatably connected to the inner wall of the needle-type depth gauge body, two positioning components symmetrically arranged on the adjustment component for abutting against the inner wall of the measuring hole of the car interior tie rod, a protective cover slidably fitted at the opening in the middle of the bottom end of the needle-type depth gauge body, a transmission mechanism rotatably connected to the inner wall of the needle-type depth gauge body, fan blades for cleaning the inner wall of the measuring hole of the car interior tie rod on the inner wall of the needle-type depth gauge body, and a handheld component for easy handling of the measuring tool rotatably connected to one side of the needle-type depth gauge body.

[0008] Preferably, the inner wall of the needle-plate depth gauge body is provided with an exhaust groove, the inner wall of the needle-plate depth gauge body is provided with a measuring needle, the measuring needle is inserted into the exhaust groove, and a filter screen is installed at the air inlet end of the exhaust groove.

[0009] Preferably, the adjustment assembly includes a bidirectional lead screw, both ends of which are rotatably connected to the inner wall of the needle-plate depth gauge body. A motor is fixedly connected to one end of the bidirectional lead screw, and the motor is fixedly connected to the inner wall of the needle-plate depth gauge body. A drive wheel is fixedly connected to the middle of the bidirectional lead screw.

[0010] Preferably, the positioning component includes a movable frame, which is slidably fitted with the inner wall of the needle-plate depth gauge body, the movable frame is threadedly connected to a bidirectional lead screw, a guide shaft is provided in the middle of the movable frame, a guide frame is slidably fitted on the outer wall of the guide shaft, the guide frame is bent, and the guide frame is fixedly connected to the inner wall of the needle-plate depth gauge body.

[0011] Preferably, lifting rods are rotatably connected to both ends of the guide shaft, the bottom end of the lifting rods is slidably connected to the movable frame, and a positioning wheel is rotatably connected to the bottom end of the lifting rods.

[0012] Preferably, the top surface of the protective cover is slidably in contact with the exhaust outlet end. Two sliding rods are fixedly connected to the top surface of the protective cover in a symmetrical structure. The sliding rods are slidably engaged with the bottom end of the needle-plate depth gauge body. Multiple tension springs are fixedly connected to the inner wall of one side of the protective cover. The other end of the tension springs is fixedly connected to the inner wall of the needle-plate depth gauge body. Two contact shafts are fixedly connected to one side of the protective cover in a symmetrical structure. A trapezoidal plate is fixedly connected to the side of the movable frame facing the contact shafts. The inclined surface of the trapezoidal plate is slidably in contact with the outer wall of the contact shaft.

[0013] Preferably, the transmission mechanism includes a rotating shaft, which is rotatably connected to the inner wall of the exhaust groove. An electric actuator is fixedly connected to the bottom end of the rotating shaft, and a first transmission wheel is fixedly connected to the output end of the electric actuator. The first transmission wheel meshes with the driving wheel for transmission, and a second transmission wheel is fixedly connected to one end of the rotating shaft located inside the exhaust groove.

[0014] Preferably, a fixed frame is rotatably connected to the end of the fan blade shaft, the fixed frame is fixedly connected to the inner wall of the exhaust groove, and a driven wheel is fixedly connected to the end of the fan blade shaft, the driven wheel and the transmission wheel are meshed and driven.

[0015] Preferably, the handheld assembly includes a worm gear, which is rotatably connected to the outer wall of the needle-plate depth gauge body. A knob is fixedly connected to one end of the worm gear, and worm wheels are meshed and driven on both sides of the worm gear. An L-shaped rod is fixedly connected through and through the worm wheels. One end of the L-shaped rod is rotatably connected to the outer wall of the needle-plate depth gauge body, and a handle is fixedly connected to the other end of the L-shaped rod. A universal joint is fixedly connected to the other end of the worm gear, and a brush rod is fixedly connected to the other end of the universal joint. The brush rod is rotatably connected to the outer wall of the needle-plate depth gauge body and slides in contact with the outer side of the filter screen.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. By setting fan blades inside the main body of the needle-plate depth gauge, when the adjustment component moves the positioning component to perform positioning measurement on the main body of the needle-plate depth gauge, the fan blades can be driven to rotate rapidly, thereby blowing high-speed airflow into the test hole of the inner tie rod of the car, thus blowing out the particles in the hole, ensuring that the measuring needle can smoothly contact the inclined surface of the inner tie rod, reducing the interference of particles on the measuring needle, avoiding measurement errors caused by particles, improving the accuracy of depth measurement, and enabling more accurate acquisition of depth data of the inner inclined surface; 2. Simultaneously, by setting up a positioning component, the main body of the needle-plate depth gauge is placed at the top of the hole to be measured on the inner rod of the vehicle. Then, driven by the adjusting component, the two moving frames move to the sides respectively. At this time, the two positioning wheels at the bottom of the moving frames will abut against the inner wall of the hole to be measured, so that the depth gauge main body can be stably positioned at the top of the hole during measurement, avoiding positioning deviations caused by human operation or equipment vibration. This ensures the accuracy of the measurement position, making the measurement results more accurate and reducing errors caused by inaccurate positioning.

[0017] 3. By setting a sliding protective cover at the bottom of the needle-plate depth gauge body, the protective cover can be automatically closed when the positioning component resets, protecting the measuring needle that has retracted inside and preventing damage to the measuring needle from external dust, dirt, or collisions. At the same time, by setting a hand-held component on the outside of the needle-plate depth gauge body, the two handles can be rotated and flattened during use, allowing the user to hold the needle-plate depth gauge body from both sides, improving the comfort of carrying and using it. Especially in actual work, when the measuring instrument needs to be repeatedly operated, it can reduce hand fatigue. At the same time, it will drive the connected brush rod to rotate, perform self-cleaning of the filter screen, ensure the efficiency of the fan blade air extraction and cleaning, and ensure that particulate matter is thoroughly removed before measurement. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of a measuring tool for detecting the depth of the inner inclined surface of an automotive tie rod according to the present invention; Figure 2 This is a partial cross-sectional view of the overall structure of a measuring tool for detecting the depth of the inner inclined surface of an automotive tie rod according to the present invention. Figure 3 This is a partial cross-sectional schematic diagram of the main structure of a needle-type depth gauge, which is a measuring tool for detecting the depth of the inner inclined surface of an automotive tie rod according to the present invention. Figure 4 This is a schematic diagram of the structure of the adjusting component of a measuring tool for detecting the depth of the inner inclined surface of an automotive tie rod according to the present invention; Figure 5 This is a schematic diagram of the positioning component structure of a measuring tool for detecting the depth of the inner inclined surface of an automotive tie rod according to the present invention; Figure 6 This is a schematic diagram of the protective cover structure of a measuring tool for detecting the depth of the inner inclined surface of an automotive tie rod according to the present invention. Figure 7 This is a schematic diagram of the transmission mechanism and fan blade structure of a measuring tool for detecting the depth of the inner inclined surface of an automotive tie rod according to the present invention. Figure 8 This is a schematic diagram of the handheld component structure of a measuring tool for detecting the depth of the inner inclined surface of an automotive tie rod according to the present invention.

[0019] The diagram shows: 1. Main body of the needle-type depth gauge; 2. Adjustment assembly; 3. Positioning assembly; 4. Protective cover; 5. Transmission mechanism; 6. Fan blade; 7. Handheld assembly; 101. Exhaust duct; 102. Measuring needle; 103. Filter screen; 201. Two-way lead screw; 202. Motor; 203. Drive wheel; 301. Moving frame; 302. Guide shaft; 303. Guide frame; 304. Lifting rod; 30 5. Positioning wheel; 306. Trapezoidal plate; 401. Sliding rod; 402. Tension spring; 403. Contact shaft; 501. Rotating shaft; 502. Electric actuator; 503. Transmission wheel one; 504. Transmission wheel two; 601. Fixed frame; 602. Driven wheel; 701. Worm gear; 702. Knob; 703. Worm wheel; 704. L-shaped rod; 705. Handle; 706. Universal joint; 707. Brush rod. Detailed Implementation

[0020] The following description is intended to disclose the invention and enable those skilled in the art to implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art.

[0021] like Figures 1-8The instrument shown is a measuring tool for measuring the depth of the inclined surface inside a car interior tie rod. It includes a needle-type depth gauge body 1, an adjustment component 2 rotatably connected to the inner wall of the needle-type depth gauge body 1, two positioning components 3 symmetrically arranged on the adjustment component 2 for abutting against the inner wall of the measuring hole of the car interior tie rod, a protective cover 4 slidably fitted at the opening in the middle of the bottom end of the needle-type depth gauge body 1, a transmission mechanism 5 rotatably connected to the inner wall of the needle-type depth gauge body 1, a fan blade 6 for cleaning the inner wall of the measuring hole of the car interior tie rod, and a handheld component 7 rotatably connected to one side of the needle-type depth gauge body 1 for easy handling of the measuring tool.

[0022] like Figure 3 As shown, an exhaust groove 101 is provided through the inner wall of the main body 1 of the needle-type depth gauge. A measuring needle 102 is provided on the inner wall of the main body 1 of the needle-type depth gauge. The measuring needle 102 passes through the exhaust groove 101. A filter screen 103 is installed at the air inlet end of the exhaust groove 101.

[0023] The exhaust groove 101 has a cylindrical structure with a smooth inner wall. On the one hand, it provides sliding and installation space for the measuring needle 102, ensuring that the measuring needle 102 can extend and retract smoothly and accurately contact the inner inclined surface of the inner pull rod. On the other hand, it serves as an air circulation channel, working with the fan blade 6 to remove particulate matter from the measuring hole. The diameter of the exhaust groove 101 is precisely matched with the dimensions of the measuring needle 102 and the fan blade 6 to ensure smooth air circulation.

[0024] like Figure 4 As shown, the adjustment component 2 includes a bidirectional lead screw 201. Both ends of the bidirectional lead screw 201 are rotatably connected to the inner wall of the needle-plate depth gauge body 1. A motor 202 is fixedly connected to one end of the bidirectional lead screw 201. The motor 202 is fixedly connected to the inner wall of the needle-plate depth gauge body 1. A drive wheel 203 is fixedly connected to the middle of the bidirectional lead screw 201.

[0025] The motor 202 is a small geared motor with adjustable speed and stable power. It can accurately drive the bidirectional lead screw 201 to rotate, so as to achieve precise adjustment of the positioning component 3.

[0026] like Figure 5As shown, the positioning component 3 includes a movable frame 301, which is slidably fitted to the inner wall of the needle-plate depth gauge body 1. The movable frame 301 is threadedly connected to a bidirectional lead screw 201. A guide shaft 302 is provided in the middle of the movable frame 301, and a guide frame 303 is slidably fitted to the outer wall of the guide shaft 302. The guide frame 303 has a bent structure and is fixedly connected to the inner wall of the needle-plate depth gauge body 1. The bent structure of the guide frame 303 is precisely designed. When the movable frame 301 moves to both sides, the guide shaft 302 slides along the bent guide frame 303, driving the lifting rod 304 to move downward, so that the positioning wheel 305 extends out of the measuring instrument and abuts against the inner wall of the measuring hole. When the movable frame 301 returns to its original position, the guide shaft 302 slides in the opposite direction along the guide frame 303, driving the lifting rod 304 to move upward, so that the positioning wheel 305 retracts into the measuring instrument, realizing automatic retraction and avoiding damage to the positioning wheel 305 when not in use.

[0027] The guide shaft 302 is rotatably connected to both ends with lifting rods 304. The bottom end of the lifting rod 304 is slidably connected to the movable frame 301. The bottom end of the lifting rod 304 is rotatably connected to a positioning wheel 305.

[0028] The positioning wheel 305 is made of wear-resistant rubber with an anti-slip surface. It can fit tightly against the inner wall of the measuring hole of the car's inner tie rod, increasing friction and preventing the measuring tool from slipping during positioning. At the same time, it avoids scratching the inner wall of the measuring hole and protects the inner tie rod from damage.

[0029] like Figure 6 As shown, the top surface of the protective cover 4 is slidably contacted with the output end of the exhaust groove 101. Two sliding rods 401 are fixedly connected to the top surface of the protective cover 4 in a symmetrical structure. The sliding rods 401 are slidably engaged with the bottom end of the needle-plate depth gauge body 1. Multiple tension springs 402 are fixedly connected to the inner wall of one side of the protective cover 4. The other end of the tension springs 402 is fixedly connected to the inner wall of the needle-plate depth gauge body 1. Two contact shafts 403 are fixedly connected to one side of the protective cover 4 in a symmetrical structure. A trapezoidal plate 306 is fixedly connected to the side of the moving frame 301 facing the contact shafts 403. The inclined surface of the trapezoidal plate 306 is slidably contacted with the outer wall of the contact shafts 403.

[0030] The protective cover 4 is made of wear-resistant plastic material with a scratch-resistant surface treatment, which can effectively block external dust and dirt from entering the exhaust groove 101, protect the measuring needle 102 from damage, and prevent the measuring needle 102 from being deformed by impact; the tension spring 402 is made of high elasticity spring steel, which is in a contracted state under normal conditions and can pull the protective cover 4 to open automatically.

[0031] like Figure 7As shown, the transmission mechanism 5 includes a rotating shaft 501, which is rotatably connected to the inner wall of the exhaust groove 101. An electric actuator 502 is fixedly connected to the bottom end of the rotating shaft 501, and a transmission wheel 503 is fixedly connected to the output end of the electric actuator 502. The transmission wheel 503 meshes with the drive wheel 203 for transmission. A transmission wheel 504 is fixedly connected to one end of the rotating shaft 501 located inside the exhaust groove 101.

[0032] The electric actuator 502 is a small electric actuator with precise extension and retraction and stable power. It can drive the transmission wheel 503 to move up and down, realizing the engagement and disengagement of the transmission wheel 503 and the drive wheel 203. The gear ratio between the drive wheel 203 and the transmission wheel 503 is precisely designed. The large gear drives the small gear to rotate, which can amplify the speed of the bidirectional lead screw 201, increase the speed of the transmission wheel 504, and thus increase the rotational speed of the fan blade 6.

[0033] like Figure 7 As shown, a fixed frame 601 is rotatably connected to the end of the fan blade 6 shaft. The fixed frame 601 is fixedly connected to the inner wall of the exhaust groove 101. A driven wheel 602 is fixedly connected to the end of the fan blade 6 shaft. The driven wheel 602 is meshed with the transmission wheel 504 for transmission.

[0034] Driven wheel 602 is welded and fixed to the shaft end of fan blade 6. The gear ratio with transmission wheel 504 is precise. The large gear drives the small gear to rotate, further amplifying the rotation speed, so that fan blade 6 reaches a high-speed rotation state and generates high-speed airflow.

[0035] By setting a fan blade 6 inside the main body 1 of the needle-plate depth gauge, when the adjusting component 2 drives the positioning component 3 to move and perform positioning measurement on the main body 1 of the needle-plate depth gauge, the fan blade 6 can be driven to rotate rapidly, thereby blowing high-speed airflow into the test hole of the inner tie rod of the car, thus blowing out the particles in the hole, ensuring that the measuring needle 102 can smoothly contact the inclined surface of the inner tie rod, reducing the interference of particles on the measuring needle 102, avoiding measurement errors caused by particles, improving the accuracy of depth measurement, and enabling more accurate acquisition of depth data of the inner inclined surface.

[0036] like Figure 8As shown, the handheld component 7 includes a worm gear 701, which is rotatably connected to the outer wall of the needle-plate depth gauge body 1. A knob 702 is fixedly connected to one end of the worm gear 701. Worm wheels 703 are meshed and driven on both sides of the worm gear 701. An L-shaped rod 704 is fixedly connected through the worm wheel 703. One end of the L-shaped rod 704 is rotatably connected to the outer wall of the needle-plate depth gauge body 1, and a handle 705 is fixedly connected to the other end of the L-shaped rod 704. A universal joint 706 is fixedly connected to the other end of the worm gear 701, and a brush rod 707 is fixedly connected to the other end of the universal joint 706. The brush rod 707 is rotatably connected to the outer wall of the needle-plate depth gauge body 1 and slides in contact with the outer side of the filter screen 103.

[0037] The handle 705 is made of soft rubber with a non-slip and sweat-proof surface, providing high hand comfort and effectively reducing hand fatigue. The brush bar 707 is equipped with soft bristles that can thoroughly clean dust and particles from the surface of the filter 103, preventing the filter 103 from clogging and scratching the surface of the filter 103, thus extending the service life of the filter 103.

[0038] Working principle: First, in the device preparation and handheld adjustment stage: the operator rotates knob 702, which drives worm gear 701 to rotate. Worm gear 701 meshes with worm wheels 703 on both sides, driving worm wheels 703 to rotate synchronously. Worm wheels 703 drive L-shaped rod 704 to rotate around the rotating connection with the needle-type depth gauge body 1, rotating the two handles 705 to flatten them, making it easier for the operator to hold the measuring instrument from both sides of the needle-type depth gauge body 1, improving operating comfort. At the same time, the rotation of worm gear 701 drives brush rod 707 to rotate through universal joint 706. Brush rod 707 slides in contact with the outer side of filter screen 103, performing self-cleaning on the surface of filter screen 103, removing dust and particles from filter screen 103, preventing filter screen 103 from clogging, and ensuring the efficiency of subsequent air extraction and cleaning by fan blade 6.

[0039] The operator then holds handle 705 and aligns the bottom of the needle-type depth gauge body 1 with the top of the hole to be tested on the car's inner tie rod, ensuring that the measuring needle 102 is aligned with the center of the measuring hole. The motor 202 is then started, causing the bidirectional lead screw 201 to rotate at a constant speed. The reverse threads at both ends of the bidirectional lead screw 201 drive the two moving frames 301 to move synchronously to both sides. As the moving frames 301 move, the guide shaft 302 slides along the bent guide frame 303, causing the lifting rod 304 to move downwards. The lifting rod 304 then causes the positioning wheel 305 to extend... The probe is moved outwards until the two positioning wheels 305 are tightly pressed against the inner wall of the hole to be tested. The motor 202 is then turned off to achieve precise positioning of the measuring instrument at the top of the measuring hole, avoiding positioning deviations caused by human operation or vibration during the testing process. At the same time, when the moving frame 301 moves to both sides, the trapezoidal plate 306 on its side moves synchronously. The trapezoidal plate 306 moves away from the contact shaft 403. At this time, the tension spring 402 drives the protective cover 4 to automatically open, exposing the exhaust groove 101 and the measuring needle 102, preparing for subsequent cleaning and measurement.

[0040] While the bidirectional lead screw 201 drives the moving frame 301 to move, the bidirectional lead screw 201 drives the drive wheel 203 to rotate, and the drive wheel 203 drives the transmission wheel 503 to rotate at high speed, amplifying the rotation speed; the transmission wheel 503 drives the rotating shaft 501 to rotate at high speed synchronously, and the rotating shaft 501 drives the transmission wheel 504 in the exhaust groove 101 to rotate, and the transmission wheel 504 drives the driven wheel 602 to rotate at high speed further, and the driven wheel 602 drives the fan blade 6 to rotate at high speed on the fixed frame 601; the high-speed rotation of the fan blade 6 generates a high-speed airflow, and the air is drawn in from the air inlet end of the exhaust groove 101, filtered by the filter screen 103 to remove external dust, and then blown at high speed into the test hole of the inner tie rod of the car, thoroughly blowing out the dust, metal fragments and other particles in the hole, ensuring that the measuring needle 102 can smoothly contact the inner inclined surface of the inner tie rod. Then, the measuring needle 102 inside the main body 1 of the needle-plate depth gauge passes through the exhaust groove 101 and precisely fits the inner inclined surface of the inner pull rod to be tested. The depth data of the inner inclined surface is read through the dial of the main body 1 of the needle-plate depth gauge to complete the depth test. Since there is no particulate interference in the measuring hole and the measuring tool is accurately positioned, the measurement data is more accurate.

[0041] After depth measurement is completed, the electric actuator 502 retracts, causing the transmission wheel 503 to separate from the drive wheel 203, allowing the measuring needle 102 to retract into the exhaust groove 101. The motor 202 is then started and reversed, causing the bidirectional lead screw 201 to rotate in the opposite direction. The bidirectional lead screw 201 drives the two moving frames 301 to synchronously reset inwards. When the moving frames 301 reset, the guide shaft 302 slides in the opposite direction along the guide frame 303, causing the lifting rod 304 to move upwards. The lifting rod 304 then drives the positioning wheel 305 to retract into the main body 1 of the needle-disc depth gauge, thus retracting the positioning wheel 305. 05 Automatically retracts; simultaneously, the trapezoidal plate 306 on the movable frame 301 contacts and presses against the contact shaft 403 of the protective cover 4, causing the protective cover 4 to slide back to its original position via the sliding rod 401, closing the output end of the exhaust groove 101, sealing and protecting the measuring needle 102, preventing external dust and dirt from entering or damaging the measuring needle 102; turn off the motor 202, turn the knob 702, causing the worm gear 701 to rotate in the opposite direction, the worm gear 701 to rotate the worm wheel 703 in the opposite direction, the worm wheel 703 to rotate the L-shaped rod 704, retracting the handle 705, reducing the space occupied by the measuring tool, and facilitating storage.

[0042] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0043] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention. The scope of protection claimed by the appended claims and their equivalents is defined.

Claims

1. A measuring instrument for detecting the depth of the inner inclined surface of a car tie rod, comprising a needle-type depth gauge body (1), characterized in that: The inner wall of the needle-type depth gauge body (1) is rotatably connected to an adjustment component (2). The adjustment component (2) has two positioning components (3) arranged symmetrically to abut against the inner wall of the measuring hole of the car's inner tie rod. A protective cover (4) is slidably fitted at the opening at the middle of the bottom end of the needle-type depth gauge body (1). A transmission mechanism (5) is rotatably connected to the inner wall of the needle-type depth gauge body (1). A fan blade (6) is provided on the inner wall of the needle-type depth gauge body (1) for cleaning the inner wall of the measuring hole of the car's inner tie rod. A handheld component (7) for easy handling of measuring tools is rotatably connected to one side of the needle-type depth gauge body (1).

2. The measuring tool for detecting the depth of the inner inclined surface of an automotive tie rod according to claim 1, characterized in that: The inner wall of the needle-type depth gauge body (1) is provided with an exhaust groove (101), and a measuring needle (102) is provided on the inner wall of the needle-type depth gauge body (1). The measuring needle (102) passes through the exhaust groove (101), and a filter screen (103) is installed at the air inlet end of the exhaust groove (101).

3. The measuring tool for detecting the depth of the inner inclined surface of an automotive tie rod according to claim 1, characterized in that: The adjustment component (2) includes a bidirectional lead screw (201), both ends of which are rotatably connected to the inner wall of the needle-plate depth gauge body (1). A motor (202) is fixedly connected to one end of the bidirectional lead screw (201), and the motor (202) is fixedly connected to the inner wall of the needle-plate depth gauge body (1). A drive wheel (203) is fixedly connected to the middle of the bidirectional lead screw (201).

4. The measuring tool for detecting the depth of the inner inclined surface of an automotive tie rod according to claim 1, characterized in that: The positioning component (3) includes a movable frame (301), which is slidably fitted with the inner wall of the needle-plate depth gauge body (1). The movable frame (301) is threadedly connected to a two-way lead screw (201). A guide shaft (302) is provided in the middle of the movable frame (301). A guide frame (303) is slidably fitted on the outer wall of the guide shaft (302). The guide frame (303) is bent and fixedly connected to the inner wall of the needle-plate depth gauge body (1).

5. The measuring tool for detecting the depth of the inner inclined surface of an automotive tie rod according to claim 4, characterized in that: The guide shaft (302) is rotatably connected to both ends with lifting rods (304), the bottom end of the lifting rod (304) is slidably connected to the moving frame (301), and the bottom end of the lifting rod (304) is rotatably connected to a positioning wheel (305).

6. The measuring tool for detecting the depth of the inner inclined surface of an automotive tie rod according to claim 4, characterized in that: The top surface of the protective cover (4) is slidably contacted with the output end of the exhaust groove (101). The top surface of the protective cover (4) is symmetrically connected with two sliding rods (401). The sliding rods (401) are slidably engaged with the bottom end of the needle-plate depth gauge body (1). Multiple tension springs (402) are fixedly connected to the inner wall of one side of the protective cover (4). The other end of the tension springs (402) is fixedly connected to the inner wall of the needle-plate depth gauge body (1). Two contact shafts (403) are symmetrically connected to one side of the protective cover (4). A trapezoidal plate (306) is fixedly connected to the side of the moving frame (301) facing the contact shafts (403). The inclined surface of the trapezoidal plate (306) is slidably contacted with the outer wall of the contact shafts (403).

7. The measuring tool for detecting the depth of the inner inclined surface of an automotive tie rod according to claim 1, characterized in that: The transmission mechanism (5) includes a rotating shaft (501), which is rotatably connected to the inner wall of the exhaust groove (101). An electric actuator (502) is fixedly connected to the bottom end of the rotating shaft (501), and a transmission wheel (503) is fixedly connected to the output end of the electric actuator (502). The transmission wheel (503) meshes with the drive wheel (203) for transmission. A transmission wheel (504) is fixedly connected to one end of the rotating shaft (501) located in the exhaust groove (101).

8. A measuring tool for detecting the depth of the inner inclined surface of an automotive tie rod according to claim 7, characterized in that: A fixed frame (601) is rotatably connected to the end of the fan blade (6). The fixed frame (601) is fixedly connected to the inner wall of the exhaust groove (101). A driven wheel (602) is fixedly connected to the end of the fan blade (6). The driven wheel (602) is meshed with the transmission wheel (504) for transmission.

9. A measuring tool for detecting the depth of the inner inclined surface of an automotive tie rod according to claim 2, characterized in that: The handheld assembly (7) includes a worm gear (701), which is rotatably connected to the outer wall of the needle-plate depth gauge body (1). A knob (702) is fixedly connected to one end of the worm gear (701). Worm wheels (703) are meshed and driven on both sides of the worm gear (701). An L-shaped rod (704) is fixedly connected through the worm wheel (703). One end of the L-shaped rod (704) is rotatably connected to the outer wall of the needle-plate depth gauge body (1). A handle (705) is fixedly connected to the other end of the L-shaped rod (704). A universal joint (706) is fixedly connected to the other end of the worm gear (701). A brush rod (707) is fixedly connected to the other end of the universal joint (706). The brush rod (707) is rotatably connected to the outer wall of the needle-plate depth gauge body (1). The brush rod (707) is in sliding contact with the outer side of the filter screen (103).

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