Mechanical movement impact resistance testing tool and assembly method thereof

Abstract

A mechanical movement impact resistance testing tool comprises a test support, a test base plate, a pendulum clamp, a shock absorber unit, and a position limiting assembly. The test support is provided with at least one mounting hole. The test base plate is fixed in the mounting hole. The upper surface of the test base plate is provided with a groove for receiving a balance wheel. The bottom surface of the groove is provided with a recess for receiving two discs. The bottom surface of the recess is provided with a middle hole for inserting the lower shaft tip of the balance shaft. The bottom surface of the recess is provided with a positioning hole for inserting a disc nail. The pendulum clamp is fixed to the test base plate and forms a cantilever above the groove. The shock absorber unit includes a shock absorber mounted on the cantilever. The lower surface of the shock absorber is provided with a socket for allowing the upper shaft tip of the balance shaft to enter the center hole of the shock absorber. The position limiting assembly includes an outer stud fixedly connected to the shock absorber and an inner clamp. The bottom of the outer stud is provided with a first slit for receiving the end of a hairspring, and the bottom of the inner clamp is provided with a second slit for receiving the outermost arc portion of the hairspring. An assembly method for the mechanical movement impact resistance testing tool is also disclosed.

Description

Technical Field

[0001] The present invention relates to the technical field of watch performance testing, and in particular to a tool for testing the impact resistance of a mechanical movement and an assembly method thereof. Background Art

[0002] The speed regulating system is the core component of a mechanical watch, equivalent to the "heart" of the human body, and directly determines the performance of a mechanical watch. The speed regulating system primarily consists of a hairspring and a balance wheel. The hairspring is an elastic element that generates a stable oscillation period through vibration, which determines the watch's timekeeping accuracy. Basic requirements for a hairspring in a mechanical watch include stable elastic properties, minimal elastic hysteresis, a small thermal expansion coefficient, good anti-magnetic and corrosion resistance, uniform thread pitch, and a hairspring center of gravity that is aligned with its geometric center as closely as possible. However, during daily wear, mechanical watches may be subject to bumps, even drops, and external impacts. These impacts can affect the speed regulating system. In particular, the delicate hairspring can be subjected to impact forces exceeding its tolerance, causing plastic deformation and, in turn, compromising the watch's timekeeping accuracy. Currently, watches are required to undergo shock resistance testing of the hairspring before they leave the factory. However, due to limitations in testing methods and equipment, shock testing often requires the use of finished mechanical movements, which can damage other components of the movement, increasing watch production and testing costs. Summary of the Invention

[0003] Based on this, it is necessary to provide a mechanical movement impact resistance test tool and its assembly method to address the above-mentioned shortcomings. It can be used to clamp the watch speed regulation component to perform impact resistance test on the speed regulation component. It does not require the use of finished mechanical movements for impact testing, thus avoiding losses caused by damage to the movement.

[0004] A mechanical movement impact resistance testing tool is used to test the impact resistance of a speed regulating assembly. The speed regulating assembly includes a balance wheel, a balance shaft passing through the middle of the balance wheel, a hairspring located above the balance wheel and sleeved on the balance shaft, a double disc located below the balance wheel and sleeved on the balance shaft, and a disc nail fixed to the double disc and extending downwardly away from the balance wheel. The mechanical movement impact resistance testing tool includes a test support plate and at least one test unit. The test support plate is provided with at least one mounting hole corresponding to each test unit. The inner wall of the mounting hole is provided with a step forming a support portion. The test unit includes:

[0005] a test substrate, the test substrate being received in the mounting hole and fixedly connected to the upper surface of the step, the upper surface of the test substrate being provided with a groove for receiving and fixing the balance wheel, a recess being provided at the center of the bottom surface of the recess for receiving the double discs, a middle hole being provided at the center of the bottom surface of the recess, penetrating the lower surface of the test substrate and for inserting the lower shaft tip of the balance shaft, and a positioning hole being provided on the bottom surface of the recess, penetrating the lower surface of the test substrate and for inserting the disc nail, being provided next to the middle hole;

[0006] A swing clamp, the swing clamp being fixed to the upper surface of the test substrate and having a cantilever suspended above the groove, the cantilever being provided with a test hole penetrating the upper and lower surfaces of the cantilever;

[0007] A shock absorber unit, the shock absorber unit including a shock absorber having a lower portion inserted into the test hole and vertically engaged with the swing clamp, the lower surface of the shock absorber being provided with a socket for receiving the upper shaft tip of the swing shaft so as to allow the upper shaft tip of the swing shaft to enter the center hole of the shock absorber;

[0008] The limiting assembly includes an outer stud located beside the balance cock and fixedly connected to the shock absorber through an outer stud ring, and an inner clamp located beside the balance cock and fixedly connected to the shock absorber through the speed indicator. A first slit is formed at the bottom of the outer stud for passing through and fixing the end of the hairspring, and a second slit is formed at the bottom of the inner clamp for passing through the outermost arc portion of the hairspring.

[0009] In one embodiment, a plurality of countersunk holes are evenly opened at the edge of the upper surface of the test substrate, and the mechanical movement impact resistance test tool also includes a plurality of first fixing screws, each of which passes through each countersunk hole and is inserted into the step.

[0010] In one embodiment, the upper surface of the test substrate is evenly provided with a plurality of first threaded holes surrounding the groove adjacent to the groove, and the mechanical movement impact resistance test fixture also includes a plurality of second fixing screws, each of the second fixing screws is inserted into each of the first threaded holes one by one, and the lower surface of the screw head of the second fixing screw is in contact with the edge of the balance wheel.

[0011] In one embodiment, a second threaded hole and a limiting hole / groove located next to the second threaded hole are opened on the upper surface of the test substrate, and the mechanical movement impact resistance test tool also includes a fixing screw that passes through the pendulum plate and is inserted into the second threaded hole to connect the pendulum plate and the test substrate, and a limiting pin inserted into the limiting hole / groove is fixed on the lower surface of the pendulum plate.

[0012] The present invention also discloses an assembly method for the above-mentioned mechanical movement impact resistance test tool, comprising the following steps:

[0013] S1. Fix the test substrate on the step in the mounting hole of the test pallet;

[0014] S2. Assemble the balance wheel, balance shaft, hairspring, double discs, and disc nails into a speed regulating assembly, and place the speed regulating assembly on the test substrate so that the balance wheel abuts against and is fixed in the groove bottom surface, the upper portion of the double discs abuts against the groove bottom surface of the sink, the lower shaft tip of the balance shaft passes through the middle hole, and the disc nail is inserted into the positioning hole;

[0015] S3. Fix the outer pile to the shock absorber via the outer pile ring, fix the inner clamp to the shock absorber via the speed pin, install the shock absorber into the test hole of the pendulum clamp, and fix the pendulum clamp to the test base plate so that the upper shaft tip of the pendulum shaft enters the center hole of the shock absorber through the socket of the shock absorber;

[0016] S4. Pass the outermost arc portion of the hairspring through the second slit at the bottom of the inner clamp, pass the end of the hairspring through the first slit at the bottom of the outer pile, and fix the end of the hairspring in the first slit of the outer pile by glue.

[0017] The present invention also discloses a mechanical movement impact resistance test tool for testing the impact resistance of a speed regulating assembly, wherein the speed regulating assembly includes a balance wheel, a balance shaft passing through the middle of the balance wheel, a hairspring located above the balance wheel and sleeved on the balance shaft, a double disc located below the balance wheel and sleeved on the balance shaft, and a disc nail fixed to the double disc and extending downwardly away from the balance wheel. The mechanical movement impact resistance test tool includes a test support plate and at least one test unit, wherein the test support plate is provided with at least one mounting hole corresponding to the test unit, and the inner wall of the mounting hole is provided with a step forming a support portion; the test unit includes:

[0018] a test substrate, the test substrate being received in the mounting hole and fixedly connected to the upper surface of the step, the upper surface of the test substrate being provided with a groove for receiving the balance wheel and providing a swinging space for the balance wheel, and a middle hole being provided at the center of the bottom surface of the groove;

[0019] A swing clamp, the swing clamp being fixed to the upper surface of the test substrate and having a cantilever suspended above the groove, the cantilever being provided with a test hole penetrating the upper and lower surfaces of the cantilever;

[0020] The shock absorber unit includes a first shock absorber whose lower portion is inserted into the test hole and is limitedly engaged with the swing clamp in the vertical direction, and a second shock absorber fixed in the middle hole. The first shock absorber has a first insertion hole formed on its lower surface for receiving the upper shaft tip of the swing shaft so that the upper shaft tip of the swing shaft enters the center hole of the first shock absorber. The second shock absorber has a second insertion hole formed on its upper surface for receiving the lower shaft tip of the swing shaft so that the lower shaft tip of the swing shaft enters the center hole of the second shock absorber.

[0021] The limiting assembly includes an outer stud located beside the balance cock and fixedly connected to the first shock absorber through an outer stud ring, and an inner clamp located beside the balance cock and fixedly connected to the first shock absorber through an index pin. A first slit is formed at the bottom of the outer stud for inserting and fixing the end of the hairspring, and a second slit is formed at the bottom of the inner clamp for inserting the outermost arc portion of the hairspring.

[0022] In one embodiment, a plurality of countersunk holes are evenly opened at the edge of the upper surface of the test substrate, and the mechanical movement impact resistance test tool also includes a plurality of machine fixing screws, each of which passes through each countersunk hole and is inserted into the step.

[0023] In one embodiment, a fixing threaded hole and a limiting hole / groove located next to the fixing threaded hole are opened on the upper surface of the test substrate, and the mechanical movement impact resistance test tool also includes a fixing screw that passes through the pendulum plate and is inserted into the fixing threaded hole to connect the pendulum plate and the test substrate, and a limiting pin inserted into the limiting hole / groove is fixed on the lower surface of the pendulum plate.

[0024] In one embodiment, a glue layer for fixing the end of the hairspring is provided in the first gap.

[0025] The present invention also discloses an assembly method for the above-mentioned mechanical movement impact resistance test tool, comprising the following steps:

[0026] S1. Fix the test substrate on the step in the mounting hole of the test pallet;

[0027] S2. Assemble the balance wheel, balance shaft, hairspring, double discs, and disc pins into a speed regulating assembly, and place the speed regulating assembly on the test substrate so that the balance wheel enters the groove, the lower tip of the balance shaft passes through the middle hole, and enters the center hole of the second shock absorber through the second socket of the second shock absorber;

[0028] S3. Fix the outer pile to the first shock absorber via the outer pile ring, fix the inner clamp to the first shock absorber via the speed pin, install the first shock absorber in the test hole of the pendulum clamp, and fix the pendulum clamp on the test base plate so that the upper shaft tip of the pendulum shaft enters the center hole of the first shock absorber through the first insertion hole of the first shock absorber;

[0029] S4. Pass the outermost arc portion of the hairspring through the second slit at the bottom of the inner clamp, pass the end of the hairspring through the first slit at the bottom of the outer pile, and fix the end of the hairspring in the first slit of the outer pile by glue.

[0030] The mechanical movement impact resistance testing tool and assembly method of the present invention are implemented to install the speed regulating assembly on the test substrate, control the speed regulating assembly through the shock absorber, and limit the state of the balance wheel on the speed regulating assembly. The use scenarios of the speed regulating assembly in different states can be simulated to perform corresponding impact resistance tests on the hairspring of the speed regulating assembly, which is convenient for subsequent targeted improvement of the performance of the speed regulating assembly, especially the hairspring, based on the test results of the hairspring impact resistance, so that the hairspring can resist the impact force from the outside and ensure the travel accuracy of the mechanical watch. During the test, there is no need to use a finished mechanical movement for impact testing to avoid losses caused by damage to the movement. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 A top view of a tool for testing the impact resistance of a mechanical movement in one embodiment of the present invention;

[0032] Figure 2 A cross-sectional structural diagram of a tool for testing the impact resistance of a mechanical movement in one embodiment of the present invention;

[0033] Figure 3 This is a flow chart of a method for assembling a tool for testing the impact resistance of a mechanical movement according to one embodiment of the present invention;

[0034] Figure 4 A top view of a tool for testing the impact resistance of a mechanical movement in another embodiment of the present invention;

[0035] Figure 5 A cross-sectional structural diagram of a tool for testing the impact resistance of a mechanical movement in another embodiment of the present invention;

[0036] Figure 6 This is a flow chart of a method for assembling a tool for testing the impact resistance of a mechanical movement in another embodiment of the present invention. DETAILED DESCRIPTION

[0037] To make the above-mentioned objects, features, and advantages of the present invention more readily apparent, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings. The following description sets forth numerous specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0038] This solution targets the impact resistance testing of balance springs within mechanical movements, focusing on the reliability of the movement during testing to assess its compliance with standards and suitability for use. The reliability of a mechanical movement primarily determines whether its internal structure will malfunction during standard testing. The following describes the structure and assembly method of the impact resistance testing tool for mechanical movements of the present invention, using specific examples.

[0039] Example 1

[0040] Please combine Figure 1-2 This embodiment discloses a tool for testing the impact resistance of a mechanical movement. The tool is used to test the impact resistance of a speed regulating assembly, wherein the speed regulating assembly 10 is part of a watch movement and is used to control the watch's timekeeping accuracy. The speed regulating assembly 10 includes a balance wheel 101, a balance shaft 102 passing through the middle of the balance wheel 101, a hairspring 103 located above the balance wheel 101 and sleeved on the balance shaft 102, a double disc 104 located below the balance wheel 101 and sleeved on the balance shaft 102, and a disc spike 105 fixed to the double disc 104, facing away from the balance wheel 101 and extending downward. The hairspring 103 has a terminal end and an outermost arc portion, both of which serve as a stop for the hairspring 103. The balance shaft 102 has an upper shaft tip and a lower shaft tip.

[0041] In this embodiment, the mechanical movement impact resistance test tool includes a test pallet 100 and at least one test unit. The test pallet 100 is provided with at least one mounting hole 110 corresponding to each test unit. The inner wall of the mounting hole 110 is provided with a step 111 forming a support portion. The step 111 is used to provide a mounting portion for the test unit. In other words, the test pallet 100 can accommodate multiple test units at the same time so that the impact resistance of multiple speed regulating components 10 can be tested simultaneously to improve testing efficiency. The step 111 can be either an annular boss fixed to the inner wall of the mounting hole 110 or a plurality of bumps spaced along an annular path on the inner wall of the mounting hole 110 to provide mounting points for the test substrate 200. The test unit includes a test substrate 200, a swing clamp 300, a shock absorbing unit 400, and a limit assembly 500. The test substrate 200 is received in the mounting hole 110 and fixedly connected to the upper surface of the step 111 to prevent the test substrate 200 from loosening during the testing operation. The upper surface of the test substrate 200 is provided with a groove 210 for receiving and fixing the balance wheel 101. A recess 220 for receiving the double disc 104 is provided at the center of the bottom surface of the groove 210. A middle hole 230 is provided at the center of the bottom surface of the recess 220, which passes through the lower surface of the test substrate 200 and is used to insert the lower shaft tip of the balance shaft 102. It can be understood that the groove 210, the recess 220 and the middle hole 230 together constitute a stepped hole passing through the upper and lower surfaces of the test substrate 200. In this way, the corresponding parts of the speed regulation assembly 10 can be supported and limited by the various steps in the stepped hole (the bottom surface of the groove 210 and the bottom surface of the recess 220). The bottom surface of the sink 220, next to the central hole 230, has a positioning hole 240 extending through the lower surface of the test substrate 200 and for receiving the disc pin 105. By providing the positioning hole 240 and utilizing the mutual constraint between the disc pin 105 and the positioning hole 240, the rotational freedom of the speed regulating assembly 10 is limited. Specifically, the interaction between the disc pin 105 and the positioning hole 240 restricts the rotation of the speed regulating assembly 10 within the groove 210. A swing clamp 300 is fixed to the upper surface of the test substrate 200 and comprises a cantilever arm suspended above the groove 210. The cantilever arm has a test hole extending through both its upper and lower surfaces, the central axis of which is collinear with the central axis of the groove 210. The shock absorber unit 400 includes a shock absorber whose lower portion is inserted into the test hole and vertically engages with the pendulum clamp 300. The shock absorber can be secured within the test hole via screws or clips. Alternatively, the test hole can be designed as a stepped hole that conforms to the outer contour of the shock absorber. The shock absorber is supported by the sudden change in the inner diameter (shoulder) of the stepped hole to achieve vertical engagement with the pendulum clamp. A socket 410 is provided on the lower surface of the shock absorber for receiving the upper end of the pendulum shaft 102, allowing the upper end of the pendulum shaft 102 to enter the center hole of the shock absorber.The position-limiting assembly 500 is used to position the hairspring 103. It comprises an outer stud 520, located beside the balance cock 300 and fixedly connected to the shock absorber via an outer stud ring 510; and an inner clip 540, located beside the balance cock 300 and fixedly connected to the shock absorber via an index finger 530. The bottom of the outer stud 520 defines a first slit 521 for receiving and securing the end of the hairspring 103. The bottom of the inner clip 540 defines a second slit 541 for receiving the outermost arc portion of the hairspring 103. The index finger 530 is a device for adjusting the chronograph speed of the watch. It adjusts the effective length of the hairspring 103 to adjust the period of motion of the balance wheel 101, and thereby the chronograph speed of the watch. In this embodiment, the index finger 530 connects to the shock absorber and the inner clip 540. The index finger 530 and the inner clip 540 are fixed together, while the outer stud 520 and the outer stud ring 510 are fixed together.

[0042] Test support plate 100 is used for supporting each test unit, so that multiple speed regulation components 10 are tested in batches. In the present embodiment, test support plate 100 is rectangular plate structure, and it adopts the lighter aluminum alloy material of density to make, the upper surface of test support plate 100 offers four mounting holes 110 that are arranged in a square array, the cross section of mounting hole 110 is circular, and a disc-shaped test substrate 200 is installed on the step 111 of each mounting hole 110, so that four speed regulation components 10 are tested simultaneously. Preferably, the length of test support plate 100 is 80mm, and width is 50mm. The diameter of test substrate 200 is 20mm, and test substrate 200 adopts metallic copper to make. When actual processing, the diameter of test substrate 200 and the length and width of test support plate 100 can be determined according to the size comprehensive numerical value of mechanical movement speed regulation component 10 to be tested and control mechanism (swing clamp 300, shockproof unit 400 and limit assembly 500).

[0043] A plurality of countersunk holes 250 are evenly provided at the edge of the upper surface of the test substrate 200. The mechanical movement impact resistance test fixture also includes a plurality of first fixing screws 600, each of which passes through each countersunk hole 250 and is inserted into the step 111. Furthermore, a screw hole connected to the countersunk hole 250 is provided on the step 111, and the bottom of the first fixing screw 600 is inserted into the screw hole and threadedly connected to the step 111. By providing the countersunk hole 250 at the edge of the upper surface of the test substrate 200, when the first fixing screw 600 is locked in the countersunk hole 250 and the screw hole, the screw head of the first fixing screw 600 is located in the countersunk hole 250, thereby achieving a fixed connection between the test substrate and the test pallet and preventing the test substrate 200 from loosening during the test process, while reducing the impact of the screw head of the first fixing screw on the operator. Preferably, in this embodiment, three countersunk holes 250 are evenly formed at the edge of the upper surface of the test substrate 200 , and the test substrate 200 is fastened to the test support plate 100 by three first fixing screws 600 .

[0044] Furthermore, the upper surface of the test substrate 200 is uniformly formed with a plurality of first threaded holes 260 surrounding the groove 210, adjacent to the groove 210. The mechanical movement impact resistance test fixture also includes a plurality of second fixing screws 700, each of which is inserted into a corresponding first threaded hole 260, with the lower surface of the screw head of the second fixing screw 700 abutting the edge of the balance wheel 101. The second fixing screws 700 squeeze and restrict the edge of the balance wheel 101, thereby confining the balance wheel 101 of the speed regulating assembly 10 within the groove 210, preventing the balance wheel 101 from rotating during the test and preventing the balance wheel 101 from falling out of the groove 210. At the same time, by fixing the balance wheel 101, the impact force during the test can be directly applied to the hairspring 103, thereby testing the load-bearing capacity of the hairspring 103. Preferably, three first threaded holes 260 surrounding the groove 210 are evenly opened on the upper surface of the test substrate 200 adjacent to the groove 210, and the balance wheel 101 is fixed in the groove 210 by three second fixing screws 700 to ensure that the balance wheel 101 is evenly stressed and prevent the balance wheel 101 from loosening.

[0045] In this embodiment, the upper surface of the test substrate 200 is provided with a second threaded hole 270 and a retaining hole / slot 280 adjacent to the second threaded hole 270. The mechanical movement shock resistance testing fixture also includes a fixing screw 800 that passes through the balance cock 300 and is inserted into the second threaded hole 270 to connect the balance cock 300 and the test substrate 200. A retaining pin 301 is fixed to the lower surface of the balance cock 300 and inserted into the retaining hole / slot 280. Specifically, the fixing screw 800 secures the balance cock 300 to the test substrate 200. Simultaneously, the restraint between the retaining pin 301 and the retaining hole / slot 280 limits the rotational freedom of the balance cock 300, preventing it from rotating on the test substrate 200. Furthermore, in this embodiment, an adhesive layer is provided within the first slit 521 to secure the end of the hairspring 103. This adhesive layer secures the end of the hairspring 103 within the first slit 521.

[0046] Please combine Figure 1-3 The present invention also discloses an assembly method for the above-mentioned mechanical movement impact resistance test tool, which is suitable for testing the impact resistance of mechanical movements in a laboratory. The assembly method includes the following steps:

[0047] S1 . Fix the test substrate 200 on the step 111 in the mounting hole 110 of the test pallet 100 .

[0048] In this embodiment, before securing the test substrate 200 to the test pallet 100, an aluminum alloy sheet is processed using a CNC machine to obtain a test pallet 100 having a rectangular plate structure of 80 mm in length and 50 mm in width. Four mounting holes 110 arranged in a square matrix are provided on the test pallet 100, each with a corresponding screw hole. Subsequently, a copper sheet is processed using a CNC machine to obtain four disc-shaped test substrates 200 having a diameter of 20 mm. The corresponding grooves 210, recessed grooves 220, positioning holes 240, intermediate holes 230, and first threaded holes 260 are machined on the test pallet 100. After the test pallet 100 and test substrates 200 are machined, each test substrate 200 is secured to its corresponding mounting holes 110 of the test pallet 100 using first screws 600. The thread size of the first screws 600 is selected to be S0.7.

[0049] S2. Assemble the balance wheel 101, balance staff 102, hairspring 103, double disc 104, and disc pin 105 into the speed regulating assembly 10. Place the speed regulating assembly 10 on the test substrate 200, ensuring that the balance wheel 101 abuts and is secured within the bottom surface of the groove 210, the upper portion of the double disc 104 abuts the bottom surface of the recess 220, the lower tip of the balance staff 102 penetrates the middle hole 230, and the disc pin 105 is inserted into the positioning hole 240, thereby restricting the rotation of the speed regulating assembly 10. In this embodiment, the balance wheel 101 is restrained within the groove 210 by three second fixing screws 700 to achieve fixation within the groove 210. The thread size of the second fixing screws 700 is selected to be S0.7.

[0050] S3. Secure the outer stud 520 to the shock absorber via the outer stud ring 510. Secure the inner clamp 540 to the shock absorber via the speed selector 530. Install the shock absorber into the test hole of the swing bridge 300. Secure the swing bridge 300 to the test substrate 200, ensuring that the tip of the swing shaft 102 enters the center hole of the shock absorber through the shock absorber's receptacle 410. In this embodiment, the retaining pin 301 on the bottom of the swing bridge 300 is inserted into the retaining hole / slot 280, and the swing bridge 300 is secured to the test substrate 200 using the fixing screw 800.

[0051] S4. Pass the outermost arc portion of the hairspring 103 through the second slit 541 at the bottom of the inner clamp 540, pass the end of the hairspring 103 through the first slit 521 at the bottom of the outer stud 520, and fix the end of the hairspring 103 in the first slit 521 of the outer stud 520 by glue.

[0052] Repeat the above steps S2-S4 until all four test units are installed on the test pallet 100, and then perform a shock resistance test on the four speed regulating components 10 on the entire fixture according to the standard process.

[0053] In this embodiment, the speed regulating assembly 10 is placed on the test substrate 200 and the balance wheel 101 of the speed regulating assembly 10 is fixed, so that the impact force during the test directly acts on the hairspring 103, thereby testing the load-bearing capacity of the hairspring 103 to the limit.

[0054] Example 2

[0055] Please combine Figure 4-5 The present invention also discloses a tool for testing the impact resistance of a mechanical movement. The tool is used to test the impact resistance of a speed regulating assembly 10, which is part of a watch movement and controls the watch's timekeeping accuracy. The speed regulating assembly 10 includes a balance wheel 101, a balance shaft 102 passing through the middle of the balance wheel 101, a hairspring 103 located above the balance wheel 101 and sleeved on the balance shaft 102, a double disc 104 located below the balance wheel 101 and sleeved on the balance shaft 102, and a disc spike 105 fixed to the double disc 104, facing away from the balance wheel 101 and extending downward. The hairspring 103 has a terminal end and an outermost arc portion, both of which serve as a limit for the hairspring 103. The balance shaft 102 has an upper shaft tip and a lower shaft tip.

[0056] In this embodiment, the mechanical movement impact resistance test tool includes a test pallet 100 and at least one test unit. The test pallet 100 is provided with at least one mounting hole 110 corresponding to the test unit. The inner wall of the mounting hole 110 is provided with a step 111 forming a support portion. The step 111 is used to provide a mounting portion for the test unit. In other words, the test pallet 100 can accommodate multiple test units at the same time so that the impact resistance of multiple speed regulating components 10 can be tested simultaneously to improve testing efficiency. The step 111 can be either an annular boss fixed to the inner wall of the mounting hole 110 or a plurality of bumps distributed along an annular path on the inner wall of the mounting hole 110 to provide mounting points for the test substrate 200. The test unit includes a test substrate 200, a swing clamp 300, a shock absorbing unit, and a limit assembly 500. The test substrate 200 is received in the mounting hole 110 and fixedly connected to the upper surface of the step 111 to prevent the test substrate 200 from loosening during the testing operation. The upper surface of the test substrate 200 is provided with a groove 210 for receiving the balance wheel 101 and providing a swinging space for the balance wheel 101. A central hole 230 is defined at the center of the bottom surface of the groove 210. This allows the balance wheel 101 to swing within the groove 210 during testing. A pendulum cock 300 is fixed to the upper surface of the test substrate 200 and comprises a cantilever arm suspended above the groove 210. The cantilever arm has a test hole extending through its upper and lower surfaces, with the central axis of the test hole collinear with the central axis of the groove 210. The shock absorber unit includes a first shock absorber 420 whose lower portion is inserted into the test hole and is limited in the vertical direction with the swing clamp 300, and a second shock absorber 430 fixed in the middle hole 230. The first shock absorber can be fixed in the test hole by screws or clips, or the test hole can be designed as a stepped hole that adapts to the outer contour of the first shock absorber, and the first shock absorber is supported by the sudden change in the inner diameter of the stepped hole (shoulder) to achieve the limited cooperation between the first shock absorber and the swing clamp in the vertical direction. Similarly, the middle hole can be designed as a stepped hole that adapts to the outer contour of the second shock absorber, and the second shock absorber is supported by the sudden change in the inner diameter of the stepped hole (shoulder) to achieve the installation of the second shock absorber in the middle hole. The lower surface of the first shock absorber 420 defines a first insertion hole 421 for receiving the upper tip of the oscillating shaft 102 so that the upper tip of the oscillating shaft 102 enters the center hole of the first shock absorber 420. The upper surface of the second shock absorber 430 defines a second insertion hole 431 for receiving the lower tip of the oscillating shaft 102 so that the lower tip of the oscillating shaft 102 enters the center hole of the second shock absorber 430. In other words, in this embodiment, after the speed control assembly 10 is mounted on the test substrate 200, a shock absorber is disposed on the top and bottom of the speed control assembly 10. Thus, the two shock absorbers work together to simulate the state of the speed control assembly 10 on a mechanical movement.The position-limiting assembly 500 is used to position the hairspring 103. It comprises an outer stud 520, located beside the balance cock 300 and fixedly connected to the first shock absorber 420 via an outer stud ring 510; and an inner clip 540, located beside the balance cock 300 and fixedly connected to the first shock absorber 420 via an index finger 530. A first slit 521 is defined at the bottom of the outer stud 520 for receiving and securing the end of the hairspring 103. A second slit 541 is defined at the bottom of the inner clip 540 for receiving the outermost arc portion of the hairspring 103. The index finger 530 is a device for adjusting the speed of the watch. It adjusts the effective length of the hairspring 103 to adjust the period of motion of the balance wheel 101, and thereby the speed of the watch. In this embodiment, the index finger 530 connects the shock absorber and the inner clip 540. The index finger 530 and the inner clip 540 are fixed together, while the outer stud 520 and the outer stud ring 510 are fixed together.

[0057] Test support plate 100 is used for supporting each test unit, so that multiple speed regulation components 10 are tested in batches. In the present embodiment, test support plate 100 is rectangular plate structure, and it adopts the aluminum alloy material with lighter density to make, the upper surface of test support plate 100 offers four mounting holes 110 that are arranged in a square array, the cross section of mounting hole 110 is circular, and a disc-shaped test substrate 200 is installed on the step 111 of each mounting hole 110, so that four speed regulation components 10 are tested simultaneously. Preferably, the length of test support plate 100 is 80mm, and width is 50mm. The diameter of test substrate 200 is 20mm, and test substrate 200 adopts metallic copper to make. When actual processing, the diameter of test substrate 200 and the length and width of test support plate 100 can be determined according to the size comprehensive numerical value of mechanical movement speed regulation component 10 to be tested and control mechanism (swing clamp 300, shockproof unit and limit assembly 500).

[0058] A plurality of countersunk holes 250 are evenly provided at the edge of the upper surface of the test substrate 200. The mechanical movement impact resistance test fixture also includes a plurality of fixing screws 900, each of which passes through each countersunk hole 250 and is inserted into the step 111. Furthermore, a screw hole connected to the countersunk hole 250 is provided on the step 111, and the bottom of the fixing screw 900 is inserted into the screw hole and threadedly connected to the step 111. By providing the countersunk hole 250 at the edge of the upper surface of the test substrate 200, when the fixing screw 900 is locked in the countersunk hole 250 and the screw hole, the screw head of the fixing screw 900 is located in the countersunk hole 250, thereby achieving a fixed connection between the test substrate and the test tray and preventing the test substrate 200 from loosening during the test process, while reducing the impact of the screw head of the fixing screw on the operator. Preferably, in this embodiment, three countersunk holes 250 are evenly formed at the edge of the upper surface of the test substrate 200 , and the test substrate 200 is fastened to the test support plate 100 by three fixing screws 900 .

[0059] In this embodiment, the upper surface of the test substrate 200 is provided with a fixing threaded hole 201 and a limiting hole / slot 280 located adjacent to the fixing threaded hole 201. The mechanical movement shock resistance testing fixture also includes a fixing screw 800 that passes through the balance cock 300 and is inserted into the fixing threaded hole 201 to connect the balance cock 300 and the test substrate 200. A limiting pin 301 is fixed to the lower surface of the balance cock 300 and inserted into the limiting hole / slot 280. Specifically, the fixing screw 800 secures the balance cock 300 to the test substrate 200. Simultaneously, the mutual restraint between the limiting pin 301 and the limiting hole / slot 280 limits the rotational freedom of the balance cock 300, preventing it from rotating on the test substrate 200. Furthermore, in this embodiment, an adhesive layer is provided within the first slit 521 to secure the end of the hairspring 103. This adhesive layer secures the end of the hairspring 103 within the first slit 521.

[0060] Please combine Figure 4-6 The present invention also discloses an assembly method for the above-mentioned mechanical movement impact resistance test tool, which is suitable for testing the impact resistance of mechanical movements in a laboratory. The assembly method includes the following steps:

[0061] S1 . Fix the test substrate 200 on the step 111 in the mounting hole 110 of the test pallet 100 .

[0062] In this embodiment, before the test substrate 200 is fixed to the test support plate 100, an aluminum alloy sheet is processed by a CNC machine to obtain a test support plate 100 with a rectangular plate structure of 80 mm in length and 50 mm in width. Four mounting holes 110 arranged in a square matrix are provided on the test support plate 100, and corresponding screw holes are provided in each mounting hole 110. Subsequently, a metal copper sheet is processed by a CNC machine to obtain four test substrates 200 with a diameter of 20 mm in a disc-shaped structure. Corresponding grooves 210, intermediate holes 230, and fixing threaded holes 201 are machined on the test substrates 200. After the test support plate 100 and the test substrates 200 are processed, each test substrate 200 is fixed one-to-one to each mounting hole 110 of the test support plate 100 using screws 900. The thread of the screws 900 is selected to be S0.7.

[0063] S2. Assemble the balance wheel 101, the balance shaft 102, the hairspring 103, the double disc 104, and the disc pin 105 into a speed regulating assembly 10, and place the speed regulating assembly 10 on the test substrate 200 so that the balance wheel 101 enters the groove 210, and the lower shaft tip of the balance shaft 102 penetrates the middle hole 230 and enters the center hole of the second shock absorber 430 through the second insertion hole 431 of the second shock absorber 430.

[0064] S3. Secure the outer stud 520 to the first shock absorber 420 via the outer stud ring 510, secure the inner clamp 540 to the first shock absorber 420 via the speed pin 530, install the first shock absorber 420 in the test hole of the swing cock 300, and secure the swing cock 300 to the test substrate 200, so that the tip of the swing shaft 102 enters the center hole of the first shock absorber 420 through the first insertion hole 421 of the first shock absorber 420. In this embodiment, the limiting pin 301 at the bottom of the swing cock 300 is inserted into the limiting hole / slot 280, and the swing cock 300 is secured to the test substrate 200 using the fixing screw 800.

[0065] S4. Pass the outermost arc portion of the hairspring 103 through the second slit 541 at the bottom of the inner clamp 540, and pass the end of the hairspring 103 through the first slit 521 at the bottom of the outer stud 520. Then, glue the end of the hairspring 103 into the first slit 521 of the outer stud 520. At this time, the balance wheel 101 can swing normally under the drive of the hairspring 103.

[0066] Repeat the above steps S2-S4 until all four test units are installed on the test pallet 100, and then perform a shock resistance test on the four speed regulating components 10 on the entire fixture according to the standard process.

[0067] In this embodiment, the speed regulating assembly 10 is set on the test substrate 200, and the speed regulating assembly 10 is controlled by the upper and lower shock absorbers, which can simulate the state of the speed regulating assembly 10 on the mechanical movement. After the speed regulating assembly 10 is subjected to impact force, the state of the hairspring 103 and the states of the two shaft tips (upper shaft tip and lower shaft tip) of the balance shaft 102 of the speed regulating assembly 10 are verified to detect the impact resistance of the hairspring 103.

[0068] The above-mentioned mechanical movement impact resistance test tooling and assembly method install the speed regulating component 10 on the test substrate 200, control the speed regulating component 10 through the shock absorber, and limit the state of the balance wheel 101 on the speed regulating component 10, which can simulate the use scenarios of the speed regulating component 10 in different states, so as to perform corresponding impact resistance tests on the hairspring 103 of the speed regulating component 10, and then facilitate the subsequent targeted improvement of the performance of the speed regulating component 10, especially the hairspring 103, based on the impact resistance test results of the hairspring 103, so that the hairspring 103 can resist the impact force from the outside and ensure the accuracy of the mechanical watch. During the test, there is no need to use a finished mechanical movement for impact testing to avoid losses caused by damage to the movement.

[0069] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0070] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

Claims

1. A tool for testing the impact resistance of a mechanical movement, used to test the impact resistance of a speed regulating assembly, the speed regulating assembly comprising a balance wheel, a balance shaft passing through the middle of the balance wheel, a hairspring located above the balance wheel and sleeved on the balance shaft, a double disc located below the balance wheel and sleeved on the balance shaft, and a disc spike fixed to the double disc, facing away from the balance wheel and extending downward, characterized in that: The mechanical movement impact resistance test tool includes a test pallet and at least one test unit. The test pallet is provided with at least one mounting hole corresponding to the test unit, and the inner wall of the mounting hole is provided with a step forming a support portion. The test unit includes: a test substrate, the test substrate being received in the mounting hole and fixedly connected to the upper surface of the step, the upper surface of the test substrate being provided with a groove for receiving and fixing the balance wheel, a recess being provided at the center of the bottom surface of the recess for receiving the double discs, a middle hole being provided at the center of the bottom surface of the recess, penetrating the lower surface of the test substrate and for inserting the lower shaft tip of the balance shaft, and a positioning hole being provided on the bottom surface of the recess, penetrating the lower surface of the test substrate and for inserting the disc nail, being provided next to the middle hole; A swing clamp, the swing clamp being fixed to the upper surface of the test substrate and having a cantilever suspended above the groove, the cantilever being provided with a test hole penetrating the upper and lower surfaces of the cantilever; A shock absorber unit, the shock absorber unit including a shock absorber having a lower portion inserted into the test hole and vertically engaged with the swing clamp, the lower surface of the shock absorber being provided with a socket for receiving the upper shaft tip of the swing shaft so as to allow the upper shaft tip of the swing shaft to enter the center hole of the shock absorber; The limiting assembly includes an outer stud located beside the balance cock and fixedly connected to the shock absorber through an outer stud ring, and an inner clamp located beside the balance cock and fixedly connected to the shock absorber through the speed indicator. A first slit is formed at the bottom of the outer stud for passing through and fixing the end of the hairspring, and a second slit is formed at the bottom of the inner clamp for passing through the outermost arc portion of the hairspring.

2. The mechanical movement impact resistance testing tool according to claim 1, characterized in that: A plurality of countersunk holes are evenly opened at the edge of the upper surface of the test substrate. The mechanical movement impact resistance test fixture also includes a plurality of first fixing screws, each of which passes through each countersunk hole and is inserted into the step.

3. The mechanical movement impact resistance testing tool according to claim 1, characterized in that: The upper surface of the test substrate is evenly provided with a plurality of first threaded holes surrounding the groove adjacent to the groove. The mechanical movement impact resistance test fixture also includes a plurality of second fixing screws, each of which is inserted into each first threaded hole one by one, and the lower surface of the screw head of the second fixing screw is in contact with the edge of the balance wheel.

4. The mechanical movement impact resistance testing tool according to claim 1, characterized in that: A second threaded hole and a limiting hole / slot are provided on the upper surface of the test substrate. The mechanical movement impact resistance test fixture also includes a fixing screw that passes through the pendulum plate and is inserted into the second threaded hole to connect the pendulum plate and the test substrate. A limiting pin inserted into the limiting hole / slot is fixed on the lower surface of the pendulum plate.

5. A method for assembling the tooling for testing the impact resistance of a mechanical movement according to any one of claims 1 to 4, characterized in that: The following steps are involved: S1. Fix the test substrate on the step in the mounting hole of the test pallet; S2. Assemble the balance wheel, balance shaft, hairspring, double discs, and disc nails into a speed regulating assembly, and place the speed regulating assembly on the test substrate so that the balance wheel abuts against and is fixed in the groove bottom surface, the upper portion of the double discs abuts against the groove bottom surface of the sink, the lower shaft tip of the balance shaft passes through the middle hole, and the disc nail is inserted into the positioning hole; S3. Fix the outer pile to the shock absorber via the outer pile ring, fix the inner clamp to the shock absorber via the speed pin, install the shock absorber into the test hole of the pendulum clamp, and fix the pendulum clamp to the test base plate so that the upper shaft tip of the pendulum shaft enters the center hole of the shock absorber through the socket of the shock absorber; S4. Pass the outermost arc portion of the hairspring through the second slit at the bottom of the inner clamp, pass the end of the hairspring through the first slit at the bottom of the outer pile, and fix the end of the hairspring in the first slit of the outer pile by glue.

6. A tool for testing the impact resistance of a mechanical movement, used to test the impact resistance of a speed regulating assembly, the speed regulating assembly comprising a balance wheel, a balance shaft passing through the middle of the balance wheel, a hairspring located above the balance wheel and sleeved on the balance shaft, a double disc located below the balance wheel and sleeved on the balance shaft, and a disc spike fixed to the double disc, facing away from the balance wheel and extending downward, characterized in that: The mechanical movement impact resistance test tool includes a test pallet and at least one test unit. The test pallet is provided with at least one mounting hole corresponding to the test unit, and the inner wall of the mounting hole is provided with a step forming a support portion. The test unit includes: a test substrate, the test substrate being received in the mounting hole and fixedly connected to the upper surface of the step, the upper surface of the test substrate being provided with a groove for receiving the balance wheel and providing a swinging space for the balance wheel, and a middle hole being provided at the center of the bottom surface of the groove; A swing clamp, the swing clamp being fixed to the upper surface of the test substrate and having a cantilever suspended above the groove, the cantilever being provided with a test hole penetrating the upper and lower surfaces of the cantilever; The shock absorber unit includes a first shock absorber whose lower portion is inserted into the test hole and is limitedly engaged with the swing clamp in the vertical direction, and a second shock absorber fixed in the middle hole. The first shock absorber has a first insertion hole formed on its lower surface for receiving the upper shaft tip of the swing shaft so that the upper shaft tip of the swing shaft enters the center hole of the first shock absorber. The second shock absorber has a second insertion hole formed on its upper surface for receiving the lower shaft tip of the swing shaft so that the lower shaft tip of the swing shaft enters the center hole of the second shock absorber. The limiting assembly includes an outer stud located beside the balance cock and fixedly connected to the first shock absorber through an outer stud ring, and an inner clamp located beside the balance cock and fixedly connected to the first shock absorber through an index pin. A first slit is formed at the bottom of the outer stud for inserting and fixing the end of the hairspring, and a second slit is formed at the bottom of the inner clamp for inserting the outermost arc portion of the hairspring.

7. The mechanical movement impact resistance testing tool according to claim 6, characterized in that: A plurality of countersunk holes are evenly opened at the edge of the upper surface of the test substrate. The mechanical movement impact resistance test fixture also includes a plurality of fixing screws, each of which passes through each countersunk hole and is inserted into the step.

8. The mechanical movement impact resistance testing tool according to claim 6, characterized in that: The upper surface of the test substrate is provided with a fixed threaded hole and a limiting hole / slot located next to the fixed threaded hole. The mechanical movement impact resistance test fixture also includes a fixing screw that passes through the pendulum plate and is inserted into the fixed threaded hole to connect the pendulum plate and the test substrate. The lower surface of the pendulum plate is fixed with a limiting pin that is inserted into the limiting hole / slot.

9. The mechanical movement impact resistance testing tool according to claim 6, characterized in that: A glue layer for fixing the end of the hairspring is provided in the first gap.

10. A method for assembling the mechanical movement impact resistance test tool according to any one of claims 6 to 9, characterized in that: The following steps are involved: S1. Fix the test substrate on the step in the mounting hole of the test pallet; S2. Assemble the balance wheel, balance shaft, hairspring, double discs, and disc pins into a speed regulating assembly, and place the speed regulating assembly on the test substrate so that the balance wheel enters the groove, the lower tip of the balance shaft passes through the middle hole, and enters the center hole of the second shock absorber through the second socket of the second shock absorber; S3. Fix the outer pile to the first shock absorber via the outer pile ring, fix the inner clamp to the first shock absorber via the speed pin, install the first shock absorber in the test hole of the pendulum clamp, and fix the pendulum clamp on the test base plate so that the upper shaft tip of the pendulum shaft enters the center hole of the first shock absorber through the first insertion hole of the first shock absorber; S4. Pass the outermost arc portion of the hairspring through the second slit at the bottom of the inner clamp, pass the end of the hairspring through the first slit at the bottom of the outer pile, and fix the end of the hairspring in the first slit of the outer pile by glue.

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