Worm key dimension precision detection device and detection method

Abstract

The invention relates to the technical field of worm size detection, and discloses a worm key size precision detection device and a detection method, the worm key size precision detection device comprises a detection table, the detection table is provided with a detection box used for detecting a worm, and the detection box is internally provided with a feeding assembly used for driving the worm to move. According to the scheme, flexible positioning and mechanical linkage design is adopted, and an efficient and accurate detection process is achieved. The core lies in that the feeding assembly and the positioning structure cooperatively operate, on one hand, a worm can adjust the position in a self-adaptive mode through an elastic floating mechanism, and stable clamping is ensured through cooperation with a multi-direction rolling contact system; and on the other hand, the moving part is combined with hydraulic drive to achieve horizontal conveying, meanwhile, gear and rack transmission is converted into vertical positioning, and therefore the worm can be accurately positioned in the conveying process. And meanwhile, the scheme also comprises multiple anti-separation mechanisms, so that the operation reliability is ensured, the operation convenience and the process stability are both considered in the overall design, and an efficient solution is provided for worm detection.

Description

Technical Field

[0001] The present invention relates to the technical field of worm size detection, and in particular to a device and method for precisely detecting key dimensions of a worm. Background Art

[0002] Worms, as key components in mechanical transmission systems, are widely used in applications such as reducers and steering mechanisms that require large transmission ratios and staggered shaft transmission. Worms are typically precision-machined from high-strength alloy steel. The geometric accuracy and surface quality of their helical tooth surfaces directly impact transmission efficiency, noise levels, and service life. The main failure modes of worms include tooth wear, pitting, and scuffing, often due to dimensional deviations during the manufacturing process or improper heat treatment. Therefore, accurate measurement of the worm's pitch diameter is crucial for ensuring transmission performance and reliability.

[0003] In the traditional worm detection process, although the worm detection effect can be completed through the corresponding detection equipment, the existing technology mostly adopts a step-by-step operation mode, and the transportation, positioning and detection of the worm need to be completed in independent processes, which reduces the detection efficiency to a certain extent; secondly, even through manual loading and positioning, it is difficult to ensure repeatability and it is easy to introduce human errors.

[0004] Therefore, the existing needs are not met, so we propose a precise detection device and method for the key dimensions of the worm. Summary of the Invention

[0005] This invention provides a device and method for precisely inspecting the critical dimensions of a worm. Through an innovative mechanical linkage design, the system integrates the worm's conveying, lifting, and positioning functions into a continuous process. This system utilizes a purely mechanical structure to achieve adaptive clamping and precise positioning of the worm, eliminating the need for an additional power source or complex control program. This addresses the issue mentioned in the background art above, where existing technologies often employ a step-by-step approach, requiring separate processes for worm conveying, positioning, and inspection, thus reducing inspection efficiency.

[0006] The present invention provides the following technical solution: a device for precisely detecting the key dimensions of a worm, comprising a detection platform, a detection box for detecting the worm being provided on the detection platform, a loading assembly for driving the worm to move being provided inside the detection box, the loading assembly being composed of a moving part and a placement part, the moving part being slidably arranged inside a first slide groove opened in the detection box, the placement part being used to hold the worm to be detected, and the placement part being slidably arranged inside the moving part.

[0007] As an optional solution for the worm gear key dimension precision detection device described in the present invention, two second sliding rods are installed inside the moving part, the placement part forms a sliding fit with the second sliding rods, each of the second sliding rods is provided with a third spring, and the two ends of the third spring are respectively connected to the moving part and the placement part.

[0008] As an optional solution of the worm key size precision detection device described in the present invention, wherein: a second slide groove is opened on the bottom surface of the detection box, a limit base is movably provided inside the object placement piece, a fixed connection is formed between the bottom surface of the limit base and the connecting sleeve, the connecting sleeve is internally threadedly connected to a rotating rod, the rotating rod is fixedly set on the connecting gear, the connecting gear is set below the object placement piece, the connecting gear and the movable rack are meshed with each other, and the movable rack is fixedly set on the inner wall of one side of the second slide groove As an optional solution of the worm gear key dimension precision detection device described in the present invention, a third slide groove is also opened on the inner wall of the bottom of the second slide groove, and one end of the connecting slide rod is slidably arranged inside the third slide groove, and the other end of the connecting slide rod passes through the connecting gear, and the other end of the connecting slide rod is slidably arranged inside the rotating rod.

[0009] As an optional solution for the worm gear key dimension precision detection device described in the present invention, wherein: extrusion arc plates are symmetrically arranged inside the limiting base, first extrusion rollers are rotatably arranged at both ends of the extrusion arc plates, and an extrusion straight plate is also arranged between the two extrusion arc plates, the extrusion straight plate is slidably arranged on the inner wall of the limiting base, a second extrusion roller is rotatably arranged on the top of the extrusion straight plate, and a limiting block is also fixedly arranged on the extrusion straight plate.

[0010] As an optional solution to the worm gear key dimension precision detection device described in the present invention, a limit seat is provided below the limit block, the limit seat is fixedly provided on the inner wall of the extruded straight plate, a fixed connection is formed between the bottom of the extruded straight plate and the movable base plate, the movable base plate is slidably provided on the inner wall of the limit base, and a fifth spring is also provided between the movable base plate and the connecting slide rod.

[0011] As an optional solution to the worm gear key dimension precision detection device described in the present invention, an extrusion block is symmetrically arranged inside the placement piece, a fourth spring is arranged between the placement piece and the extrusion block, the fourth spring is sleeved on the third slide rod, one end of the third slide rod is fixedly connected to the placement piece, and the other end of the third slide rod is slidably arranged inside the extrusion block.

[0012] As an optional solution for the worm gear key dimension precision detection device described in the present invention, a U-shaped frame is provided inside the detection box, two first sliding rods are symmetrically provided on the bottom surface of the U-shaped frame, each of the first sliding rods is movably sleeved with a movable clamping block, and a second spring is provided between the movable clamping block and the U-shaped frame.

[0013] As an optional solution to the worm gear key dimension precision detection device described in the present invention, one end of an extrusion piece is also slidably arranged inside the movable clamping block, a first spring is arranged between the extrusion piece and the movable clamping block, and the other end of the extrusion piece is arranged inside the first slide groove.

[0014] A technical solution proposed by the present invention: a method for detecting key dimensions of a worm, comprising the following steps: S1. The placement piece uses an extrusion block to achieve adaptive positioning of the worm. The blanking slope guides the worm into the center. When the movable part slides along the first chute via hydraulic drive, the moving rack engages with the connecting gear, driving the rotating rod to rotate. The connecting sleeve is driven vertically by the threaded pair, causing the worm in the limit base to move upward synchronously. The composite track of the third chute controls the movement of the connecting slide rod. The inclined section realizes axial thrust, and the horizontal section locks the position, ensuring that the worm accurately enters the V-shaped positioning space of the placement piece. When the limit base rises, the connecting slide moves along the third slide slot, pushing the extrusion straight plate upward. Its limit block forces the symmetrical extrusion arc plates to close and clamp the worm. The fifth spring provides elastic buffering: when clamping a small-sized worm, the spring maintains stable pressure, while for a large-sized worm, the spring is compressed to absorb excess displacement to prevent the mechanism from getting stuck. The extrusion arc plate is equipped with anti-slip grooves, which adapt to different outer diameters through elastic deformation. The three-point contact forms rolling friction positioning to reduce surface damage. S3. After the worm arrives at the inspection station, the extrusion rod pushes the movable clamp to retract along the first slide bar. The second spring provides preload force, and the first spring dynamically adjusts the clamping pressure. During the inspection, the operator uses a calibration tool to measure the worm's center diameter. After completion, the hydraulic drive movable part resets.

[0015] The present invention has the following beneficial effects: This device for precisely detecting the key dimensions of the worm adopts a flexible positioning and mechanical linkage design to achieve an efficient and accurate detection process. Its core lies in the coordinated operation of the feeding assembly and the positioning structure. On the one hand, the elastic floating mechanism enables the worm to adaptively adjust its position, and the multi-directional rolling contact system ensures stable clamping. On the other hand, the moving part is combined with the hydraulic drive to achieve horizontal transportation, and at the same time, it is converted into vertical positioning through the gear rack transmission, so that the worm can complete precise positioning during transportation. At the same time, this solution also includes multiple anti-disengagement mechanisms to ensure operational reliability. The overall design takes into account both operational convenience and process stability, providing an efficient solution for worm detection.

[0016] 2. This device for precisely detecting critical worm dimensions creates a high-precision guide system for the moving clamp through the rigid coordination of a U-shaped frame and the first slide bar. It also leverages the synergistic action of dual springs to achieve dynamic clamping force adjustment, ensuring clamping stability while preventing workpiece damage. The extrusion ramp design optimizes the clamping process through varying inclination angles. The combination of rapid front-end response and rear-end pressure relief improves operational efficiency and safety. The third spring's buffering mechanism effectively absorbs residual kinetic energy from moving parts, protecting precision components from rigid impact and, to a certain extent, eliminating the risk of motion interference. The entire solution, through the integrated design of mechanical limits and elastic elements, significantly enhances equipment reliability and operational safety while ensuring detection accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0018] Figure 2 For the present invention Figure 1 Schematic diagram of the enlarged structure of the detection box.

[0019] Figure 3 For the present invention Figure 2 Schematic diagram of the cross-section structure of the detection box.

[0020] Figure 4 For the present invention Figure 3 Enlarged structural diagram at point A in the middle.

[0021] Figure 5 It is a schematic diagram of the top view of the moving part of the present invention.

[0022] Figure 6 It is a bottom view structural diagram of the moving part of the present invention.

[0023] Figure 7 It is a schematic diagram of the cross-sectional structure of the local moving part of the present invention.

[0024] Figure 8 This is a bottom view of the U-shaped frame structure of the present invention.

[0025] Figure 9 It is a schematic diagram of the structure of the movable clamping block of the present invention.

[0026] Figure 10 It is a schematic diagram of the cross-sectional structure of the movable clamping block of the present invention.

[0027] In the picture: 1. Inspection table; 2. Loading assembly; 101, detection box; 102, first chute; 103, U-shaped frame; 104, second chute; 105, movable clamp; 106, movable rack; 107, third chute; 108, extrusion member; 109, first spring; 110, first slide bar; 111, second spring; 201. Moving part; 202. Placement part; 203. Extrusion rod; 204. Second slide bar; 205. Extrusion block; 206. Limiting base; 207. Third spring; 209. Connecting sleeve; 210. Connecting gear; 211. Connecting slide bar; 212. Moving bottom plate; 213. Rotating rod; 215. Limiting seat; 216. Extrusion straight plate; 217. Extrusion arc plate; 218. First extrusion roller; 219. Second extrusion roller; 220. Limiting block; 221. Third slide bar; 222. Fourth spring; 223. Fifth spring. DETAILED DESCRIPTION

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0029] For example 1, please refer to Figures 1-10 The device for precisely detecting the key dimensions of a worm includes a detection platform 1, on which a detection box 101 for detecting the worm is provided. A loading assembly 2 for driving the worm to move is provided inside the detection box 101. The loading assembly 2 is composed of a moving part 201 and a placement part 202. The moving part 201 is slidably arranged inside a first chute 102 provided in the detection box 101. The placement part 202 is used to hold the worm to be detected. The placement part 202 is slidably arranged inside the moving part 201. Before the user performs worm detection, the worm to be detected must first be placed inside the placement part 202. Figure 5 and Figure 7 As can be seen, the device utilizes a flexible positioning structure. The extrusion block 205 in the storage unit 202 forms an elastic floating mechanism via the third slide bar 221 and the fourth spring 222, enabling the worm to adaptively adjust its position during placement. The ergonomically designed, inclined surface of the extrusion block 205 allows the operator to easily guide the worm into the desired area without precise alignment. When the worm contacts the inclined surface, its weight is distributed downward along the surface, and combined with the elastic support of the spring, the worm automatically adjusts to the center of the storage unit. The third slide bar 221 ensures that the extrusion block 205 moves smoothly along a fixed trajectory, preventing deflection and jamming. The preload of the fourth spring 222 is optimally matched to provide sufficient clamping force to maintain the worm's stability while preventing excessive pressure from affecting the free adjustment of the workpiece. This dynamic balancing mechanism allows worms of different specifications to achieve self-centering positioning within the storage unit 202. Length adaptability is achieved naturally through the floating stroke of the extrusion block 205, eliminating the need for additional adjustment devices.

[0030] Since the object placement member 202 is arranged inside the moving member 201, and the moving member 201 is slidably arranged inside the chute opened on the inner wall of the first chute 102 through the extrusion rods 203 arranged on both sides, and referring to Figure 1 It can be seen that one end of the moving part 201 is fixedly connected to the external hydraulic rod. Therefore, when the user activates the external hydraulic rod, the moving part 201 will slide inside the detection box 101, thereby driving the object placement part 202 to move synchronously.

[0031] When the object placement member 202 moves, the internally positioned limiting base 206 also moves synchronously. The moving rack 106, fixed to the inner wall of the second chute 104, then forms a stable mesh with the connecting gear 210, driving the connecting gear 210 to rotate precisely. The rotating rod 213, coaxially fixed to the connecting gear 210, also rotates. Because the external threads of the rotating rod 213 precisely mate with the internal threads of the connecting sleeve 209, this rotational motion is converted into the vertical movement of the connecting sleeve 209. Consequently, the upward movement of the connecting sleeve 209 also drives the limiting base 206 upward, allowing the worm gear contained within it to smoothly enter the V-shaped positioning space of the object placement member 202. Simultaneously, the first squeezing rollers 218 at each end of the squeezing arc plate 217 and the second squeezing rollers 219 at the top of the squeezing straight plate 216 form a multi-directional rolling contact system. This design ensures that the worm gear maintains point contact with the rollers during the clamping process, replacing the sliding friction of traditional clamping jaws with rolling friction, significantly reducing contact stress on the workpiece surface. The symmetrical arrangement of the first squeeze roller 218 ensures even distribution of clamping force, while the second squeeze roller 219 serves as a central positioning reference, forming a stable three-point positioning structure together with the rollers on both sides. The precision machining of the roller surface allows it to adapt to the worm thread profile, ensuring sufficient clamping force while avoiding thread deformation and surface indentations that can occur with traditional rigid clamping.

[0032] At the same time, during the resetting process after the straight plate 216 is squeezed to complete the clamping action, the limit seat 215 serves as a key mechanical stop structure, and through precise cooperation with the limit block 220, ensures that the straight plate can stably return to the initial reference position.

[0033] The initial deployment of the extrusion arc plate 217 ensures the worm gear enters the positioning area smoothly. As the limiting base 206 continues to rise, the connecting slide 211, guided by the inclined track of the third slide slot 107, pushes the fifth spring 223 and acts on the movable base plate 212, allowing the extrusion straight plate 216 to gradually move upward, overcoming the elastic resistance of the fifth spring 223. At this time, the limiting block 220 on the surface of the extrusion straight plate 216 rises, applying progressive pressure to the extrusion arc plate 217, causing it to close and wrap around the worm gear like a robotic arm. The inner surface of the extrusion arc plate 217 can be provided with anti-slip grooves or elastic pads to enhance the friction coefficient. The entire clamping process exhibits a three-stage characteristic: first, the idle travel stage of the extrusion straight plate 216, then the rapid closing stage of the extrusion arc plate 217, and finally the stable clamping state during the elastic deformation stage.

[0034] The elastic buffer design of the fifth spring 223 also provides the system with adaptive adjustment capabilities: when the worm's outer diameter is large, spring compression absorbs excess displacement, preventing the mechanism from jamming; when handling smaller workpieces, spring tension maintains stable clamping force. The entire process is completed synchronously with the movement of the object placement unit 202, without any additional pauses. The worm is precisely positioned during the transport phase and ultimately arrives precisely at the inspection station as the object placement unit 202 stops.

[0035] At the same time, the mechanical transmission system achieves multi-stage motion control of the connecting slide 211 through the composite structural design of the third slide 107. When the object 202 begins to move, the connecting slide 211 first slides along the inclined first moving station. At this time, the inclined structure of the slide decomposes the horizontal driving force into axial and radial components, forcing the connecting slide 211 to produce axial displacement within the rotating rod 213. This arrangement ensures smooth movement while avoiding rigid impact. Moreover, when the connecting slide 211 enters the horizontally arranged second moving station, the motion mode changes to pure translation. At this time, the axial position of the rotating rod 213 is locked, forming a stable working state. Throughout this process, the boundary contour of the third slide 107 not only serves as a motion guide, but its station transition area also has certain mechanical self-locking properties, which can prevent the connecting slide 211 from accidentally retreating in a vibrating environment. This structural design cleverly uses geometric constraints to replace complex electronic control systems, simplifying the mechanism while ensuring motion accuracy.

[0036] Furthermore, the pre-assembled relationship between the connecting slide rod 211 and the rotating rod 213 forms a reliable axial constraint. This built-in layout not only ensures the continuity of power transmission, but also eliminates the risk of the rod falling off.

[0037] Through the above-mentioned arrangement, not only the transportation effect of the worm to be inspected is achieved, but also compared with the prior art, this solution allows the limit base 206 to achieve a corresponding upward movement while following the movement of the moving part 201 and the object placement part 202. This upward movement is to drive the worm to be inspected set inside the limit base 206 to move upward accordingly, so that after the object placement part 202 stops moving, the worm to be inspected is already between the inspection components, thereby completing the loading effect of the worm to be inspected.

[0038] Example 2: This example is intended to solve the problem in the prior art that even if the worm is transported by a corresponding transport device, manual loading and unloading is still required. This example is an improvement made on the basis of Example 1. For details, please refer to Figures 1-10 In the structural design of the interior of the detection box 101, the U-shaped frame 103 provides a stable sliding track for the mobile clamp 105 through the symmetrically distributed first slide rod 110. The preload force of the second spring 111 enables the mobile clamp 105 to maintain a tendency to expand outward in a natural state, while the cooperation between the extrusion member 108 and the first slide groove 102 forms a dynamic guiding system: when the external drive mechanism pushes the mobile part 201 to move toward the detection area, the object placement part 202 gradually slows down under the composite trajectory constraints of the second slide groove 104 and the third slide groove 107 until its range of motion is completely blocked by the mechanical limit. At this time, the rigidity of the third spring 207 plays a key role. It absorbs the remaining kinetic energy of the mobile part 201 through elastic potential energy at the moment the object placement part 202 stops, preventing damage to precision components caused by rigid impact.

[0039] As the moving part 201 continues to move, the storage part 202 sleeved on the second slide bar 204 begins to come into contact with the moving clamp 105. The end of the extrusion part 108 slides along the inclined profile of the first slide groove 102, forcing the two moving clamps 105 to overcome the elastic force of the second spring 111 and retract toward the center. At this time, the progressive compression of the first spring 109 not only provides a flexible clamping force, but also realizes the adaptive adjustment of the contact pressure through deformation feedback. The synergistic effect of this dual spring system ensures that the storage part 202 is always in a dynamic equilibrium state during the clamping process - it not only ensures the stability of the clamping, but also avoids mechanical damage caused by overload. The completion of the entire clamping action forms a precise linkage with the stroke of the moving part 201, and ultimately realizes the precise positioning and stress-free fixation of the test piece at the detection station, creating ideal physical conditions for subsequent detection processes.

[0040] When the movable clamp 105 completes the reliable clamping of the worm to be tested, the operator can use a calibrated professional measuring tool to precisely measure the mean diameter of the worm. To ensure measurement accuracy, it is recommended to clean the surface of the worm and check the calibration status of the measuring tool before measurement. During the measurement process, the operator should maintain a stable measuring force and consistent measuring position to obtain repeatable measurement results. After the measurement is completed, the movable part 201 is smoothly driven to reset through the external hydraulic control system, and a mechanical limit device is provided during the reset process to ensure positioning accuracy. After the movable part 201 is reset into place, the system will issue a prompt signal, and the operator can safely remove the measured worm. At this time, the operator needs to check the cleanliness of the positioning surface of the placement part 202 to ensure that the next worm to be measured can be accurately positioned. The entire measurement cycle adopts a modular design, and each functional unit operates in coordination, which ensures both measurement efficiency and operational safety.

[0041] Through the ingenious structural design of the U-shaped frame 103, in conjunction with the arrangement of the first slide bar 110 along its bottom surface, it is ensured that the motion trajectory of the mobile clamping block 105 is strictly limited to the guide range of the U-shaped frame 103. Since the U-shaped frame 103 is firmly fixed to the main frame of the detection box 101 by a rigid connection, this arrangement not only provides a stable motion reference for the mobile clamping block 105, but also achieves safe avoidance with the mobile member 201 through a spatial dislocation design. Specifically, the installation height of the mobile clamping block 105 is accurately calculated and always remains above the operating plane of the mobile member 201, and the two maintain a reliable safety distance in the vertical direction. This three-dimensional layout allows the two moving parts to form a clear upper and lower hierarchical relationship in space when the mobile member 201 moves horizontally to the position directly below the mobile clamping block 105, completely eliminating the risk of possible plane interference.

[0042] In order to further better explain the above embodiment, the present invention also provides an embodiment, a method for detecting key dimensions of a worm, comprising the following steps: Step 1: The object placement part 202 realizes adaptive positioning of the worm through the extrusion block 205. The blanking slope guides the worm to slide into the center. When the movable part 201 slides along the first slide groove 102 by hydraulic drive, the movable rack 106 engages with the connecting gear 210, driving the rotating rod 213 to rotate. The connecting sleeve 209 is driven vertically by the thread pair, so that the worm in the limit base 206 moves upward synchronously. The composite track of the third slide groove 107 controls the movement of the connecting slide rod 211. The inclined section realizes axial thrust, and the horizontal section locks the position to ensure that the worm accurately enters the V-shaped positioning space of the object placement part 202. Step 2: When the limiting base 206 rises, the connecting slide 211 moves along the third slide groove 107, pushing the extrusion straight plate 216 upward. Its limiting block 220 forces the symmetrical extrusion arc plate 217 to close and clamp the worm. The fifth spring 223 provides elastic buffering: when a small-sized worm is clamped, the spring maintains stable pressure. When a large-sized worm is clamped, the spring is compressed to absorb excess displacement to prevent the mechanism from getting stuck. The extrusion arc plate 217 is provided with anti-slip grooves. Through elastic deformation, it adapts to different outer diameters. The three-point contact forms rolling friction positioning to reduce surface damage. Step 3: After the worm arrives at the inspection station, the extrusion rod 203 pushes the movable clamp 105 to retract along the first slide bar 110, the second spring 111 provides preload force, and the first spring 109 dynamically adjusts the clamping pressure. During the inspection, the operator uses a calibration tool to measure the worm's center diameter. After completion, the hydraulic drive movable part 201 is reset.

[0043] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0044] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A device for precisely detecting the key dimensions of a worm, comprising a detection table (1), characterized in that: The inspection table (1) is provided with an inspection box (101) for inspecting a worm, and a loading assembly (2) for driving the worm to move is provided inside the inspection box (101). The loading assembly (2) is composed of a moving part (201) and a placement part (202). The moving part (201) is slidably arranged inside a first chute (102) provided in the inspection box (101), and the placement part (202) is used to hold the worm to be inspected, and the placement part (202) is slidably arranged inside the moving part (201).

2. The worm gear key dimension precision detection device according to claim 1 is characterized in that: Two second slide bars (204) are installed inside the movable member (201), and the object placement member (202) forms a sliding fit with the second slide bars (204). A third spring (207) is sleeved on each of the second slide bars (204), and two ends of the third spring (207) are respectively connected to the movable member (201) and the object placement member (202).

3. The worm gear key dimension precision detection device according to claim 2, characterized in that: A second chute (104) is provided on the bottom surface of the detection box (101), and a limit base (206) is movably provided inside the object placement part (202). A fixed connection is formed between the bottom surface of the limit base (206) and the connecting sleeve (209), and the connecting sleeve (209) is internally threadedly connected to the rotating rod (213). The rotating rod (213) is fixedly provided on the connecting gear (210), and the connecting gear (210) is provided below the object placement part (202). The connecting gear (210) and the movable rack (106) are engaged with each other, and the movable rack (106) is fixedly provided on the inner wall of one side of the second chute (104).

4. The worm gear key dimension precision detection device according to claim 3 is characterized in that: A third slide groove (107) is further provided on the inner wall of the bottom of the second slide groove (104), and one end of a connecting slide rod (211) is slidably arranged inside the third slide groove (107), and the other end of the connecting slide rod (211) passes through the connecting gear (210), and the other end of the connecting slide rod (211) is slidably arranged inside the rotating rod (213).

5. The worm gear key dimension precision detection device according to claim 3, characterized in that: The limiting base (206) is symmetrically provided with extrusion arc plates (217), and first extrusion rollers (218) are rotatably provided at both ends of the extrusion arc plates (217). An extrusion straight plate (216) is also provided between the two extrusion arc plates (217). The extrusion straight plate (216) is slidably provided on the inner wall of the limiting base (206), and a second extrusion roller (219) is rotatably provided on the top of the extrusion straight plate (216). A limiting block (220) is also fixedly provided on the extrusion straight plate (216).

6. The worm gear key dimension precision detection device according to claim 5, characterized in that: A limiting seat (215) is provided below the limiting block (220), and the limiting seat (215) is fixedly provided on the inner wall of the limiting base (206). A fixed connection is formed between the bottom of the extruded straight plate (216) and the movable base (212). The movable base (212) is slidably provided on the inner wall of the limiting base (206), and a fifth spring (223) is further provided between the movable base (212) and the connecting slide rod (211).

7. The worm gear key dimension precision detection device according to claim 1, characterized in that: An extrusion block (205) is symmetrically arranged inside the object placement piece (202), and a fourth spring (222) is arranged between the object placement piece (202) and the extrusion block (205). The fourth spring (222) is sleeved on the third slide bar (221), and one end of the third slide bar (221) is fixedly connected to the object placement piece (202), and the other end of the third slide bar (221) is slidably arranged inside the extrusion block (205).

8. The worm gear key dimension precision detection device according to claim 1, characterized in that: A U-shaped frame (103) is provided inside the detection box (101), and two first sliding rods (110) are symmetrically provided on the bottom surface of the U-shaped frame (103). A movable clamping block (105) is movably sleeved on each of the first sliding rods (110), and a second spring (111) is provided between the movable clamping block (105) and the U-shaped frame (103).

9. The worm gear key dimension precision detection device according to claim 8, characterized in that: One end of an extrusion member (108) is also slidably arranged inside the movable clamping block (105), a first spring (109) is arranged between the extrusion member (108) and the movable clamping block (105), and the other end of the extrusion member (108) is arranged inside the first sliding groove (102).

10. A method for detecting key dimensions of a worm, characterized in that: The device for precisely detecting the key dimensions of a worm according to any one of claims 1 to 9 comprises the following steps: S1, the placement part (202) realizes adaptive positioning of the worm through the extrusion block (205), and the blanking slope guides the worm to slide into the center. When the moving part (201) slides along the first slide groove (102) through hydraulic drive, the moving rack (106) engages with the connecting gear (210), drives the rotating rod (213) to rotate, and drives the connecting sleeve (209) to rise and fall vertically through the thread pair, so that the worm in the limit base (206) moves upward synchronously. The composite track of the third slide groove (107) controls the movement of the connecting slide rod (211), the inclined section realizes axial thrust, and the horizontal section locks the position, ensuring that the worm accurately enters the V-shaped positioning space of the placement part (202); S2. When the limit base (206) rises, the connecting slide (211) moves along the third slide groove (107), pushing the extrusion straight plate (216) to move upward, and its limit block (220) forces the symmetrical extrusion arc plate (217) to retract and clamp the worm. The fifth spring (223) provides elastic buffering: when a small-sized worm is clamped, the spring maintains a stable pressure, and when a large-sized worm is clamped, the spring is compressed to absorb excess displacement to avoid mechanism jamming. The extrusion arc plate (217) is provided with anti-slip grooves, which adapt to different outer diameters through elastic deformation, and three-point contact forms rolling friction positioning to reduce surface damage; S3. After the worm arrives at the inspection station, the extrusion rod (203) pushes the movable clamp (105) to retract along the first slide bar (110), the second spring (111) provides preload force, and the first spring (109) dynamically adjusts the clamping pressure. During the inspection, the operator uses a calibration tool to measure the worm's center diameter. After completion, the hydraulic drive movable part (201) is reset.

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