A spring pitch adjustment device

Abstract

This utility model provides a spring pitch adjustment device, relating to the field of spring pitch adjustment technology. It includes a fixed base with a self-locking drive structure inside. Two fixing structures are located at the connection of the self-locking drive structure, used to fix both ends of the spring being tested. A protective structure is also provided on the top of the fixed base to prevent the spring from breaking and popping out during pitch adjustment. The self-locking characteristics of the worm gear transmission and the symmetrical slider design in the self-locking drive structure solve the problems of easy pitch deviation and low accuracy. The fixing structure uses a combination of a threaded rod and a movable sleeve rod, which can precisely control the clamping force, adapt to springs of different specifications, and avoid insecure fixing or damage to the spring.

Description

Technical Field

[0001] This utility model relates to the field of spring pitch adjustment technology, and in particular to a spring pitch adjustment device. Background Technology

[0002] Spring pitch is the axial distance on the mean diameter between two adjacent coils of a spring, excluding the support coil. A spring is an elastic object that stores mechanical energy. Springs are usually made of spring steel and there are many spring designs. When processing springs, adjusting the spring pitch is crucial.

[0003] According to a Chinese patent document (authorization announcement number: CN218835956U), a spring pitch adjustment device includes a base plate. The base plate has an internal mounting groove, and a dual-head motor is fixedly connected inside the mounting groove. A threaded rod is fixedly connected to the output shaft of the dual-head motor. A threaded block is threaded onto the outer surface of the threaded rod. An adjustment plate is fixedly connected to the upper end of the threaded block. The adjustment plate has an internal placement groove, and a mounting column is fixedly connected inside the placement groove. A limit groove is formed inside the mounting column, and a partition is fixedly connected inside the limit groove. Second springs are fixedly connected to both ends of the partition. One end of the second spring is fixedly connected to the limit plate, and one side of the limit plate is fixedly connected to the adjustment column. By using the dual-head motor, threaded rod, and threaded block, the adjustment plate is moved, compressing the first spring and thus adjusting its pitch. The pitch of different types of first springs can be adjusted simultaneously.

[0004] However, the above solution still has the following shortcomings when implemented:

[0005] The drive structure lacks a self-locking mechanism, and the transmission method between the threaded rod and the threaded block cannot lock the position after adjustment. It is prone to pitch deviation due to vibration or spring reaction force, affecting the adjustment accuracy. Furthermore, the spring fixing structure relies on elastic clamping, and the second spring pushes the limit plate to tighten the spring. It is impossible to accurately control the clamping force, and it is difficult to adapt to springs of different hardness and specifications. There is a risk of insecure fixing or damage to the spring. Finally, the device does not have a protective structure. When the spring suddenly breaks due to overload or material defects, the flying fragments may endanger the safety of the operator, which does not meet the safety standards of industrial equipment.

[0006] Therefore, we propose a spring pitch adjustment device. Utility Model Content

[0007] The purpose of this invention is to address the shortcomings of existing technologies. The drive structure lacks a self-locking mechanism, and the transmission method between the threaded rod and the threaded block cannot lock the position after adjustment. Pitch deviation is easily caused by vibration or spring reaction force, affecting adjustment accuracy. Furthermore, the spring fixing structure relies on elastic clamping, with the second spring pushing the limiting plate to press against the spring, making it difficult to precisely control the clamping force. This makes it difficult to adapt to springs of different hardness and specifications, posing a risk of insecure fixing or spring damage. Finally, the device lacks a protective structure; when the spring suddenly breaks due to overload or material defects, the flying fragments may endanger operator safety, failing to meet industrial equipment safety standards.

[0008] To achieve the above objectives, the present invention adopts the following technical solution:

[0009] A spring pitch adjustment device includes a fixed base, the fixed base having a self-locking drive structure inside, and two fixing structures at the connection of the self-locking drive structure for fixing the two ends of the spring being tested. The top of the fixed base also has a protective structure for preventing the spring from breaking and popping out during pitch adjustment.

[0010] As a preferred embodiment of this utility model, the self-locking drive structure includes a first drive motor, a worm gear on the output end of the first drive motor, a turbine at the connection of the worm gear, a bidirectional lead screw at the center of the turbine, and two sliders symmetrically arranged at the connection of the bidirectional lead screw.

[0011] As a preferred embodiment of this utility model, the fixing structure includes a fixing seat, a first raising seat is provided at the center of the inner wall of the fixing seat, a connecting threaded rod is provided inside the first raising seat, and a second raising seat is provided on both sides of the first raising seat, and a movable sleeve is provided inside the two second raising seats.

[0012] As a preferred embodiment of this utility model, the protective structure includes a fixing frame, a second drive motor is provided on the top of the fixing frame, a ball screw is provided at the output end of the second drive motor, a linear optical axis is provided on the right side of the ball screw, and sliding blocks are installed on both the ball screw and the linear optical axis, with an acrylic protective cover provided between the two sliding blocks.

[0013] As a preferred embodiment of this utility model, the first drive motor drives the worm to rotate, the worm meshes with the turbine, and the turbine is fixedly connected to the bidirectional lead screw, thereby driving the bidirectional lead screw to rotate, and the slider is threadedly connected to the bidirectional lead screw.

[0014] As a preferred embodiment of this utility model, the movable sleeve rod is threadedly connected between the second heightening seat and the connecting threaded rod, the first heightening seat and the connecting threaded rod are fixedly connected, and the movable sleeve rod can move within the second heightening seat.

[0015] As a preferred embodiment of this utility model, the second drive motor drives the ball screw to rotate, thereby causing the sliding block to move on the ball screw. The linear optical axis is used to assist in supporting the sliding, and the acrylic protective cover is fixedly connected to the two sliding blocks.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] This invention solves the problems of easy pitch deviation and low precision by utilizing the self-locking characteristics of the worm gear transmission in the self-locking drive structure and the symmetrical slider design.

[0018] The fixed structure uses a combination of threaded rod and movable sleeve rod, which can precisely control the clamping force, adapt to springs of different specifications, and avoid insecure fixing or damage to the springs;

[0019] The protective structure utilizes a movable acrylic protective cover in conjunction with a ball screw and linear optical axis to effectively prevent spring breakage fragments from flying, ensuring operational safety and meeting industrial standards. Overall, it achieves significant improvements in precision, adaptability, and safety, and has high practical value. Attached Figure Description

[0020] Figure 1 This utility model provides a schematic diagram of the main structure of a spring pitch adjustment device;

[0021] Figure 2 A schematic diagram of an acrylic protective cover for a spring pitch adjustment device being raised, provided by this utility model;

[0022] Figure 3 This utility model provides an unfolded schematic diagram of a fixing structure for a spring pitch adjustment device;

[0023] Figure 4 This is a top view schematic diagram of a self-locking drive structure for a spring pitch adjustment device provided by this utility model.

[0024] Legend: 1. Fixed base; 21. First drive motor; 22. Worm gear; 23. Turbine; 24. Two-way lead screw; 25. Slider; 31. Fixed seat; 32. First height-increasing seat; 33. Connecting threaded rod; 34. Second height-increasing seat; 35. Movable sleeve rod; 41. Fixed frame; 42. Second drive motor; 43. Ball screw; 44. Linear optical axis; 45. Sliding block; 46. Acrylic protective cover. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0026] To facilitate understanding of this utility model, a more comprehensive description of this utility model will be provided below with reference to relevant embodiments, and several embodiments of this utility model will be given. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of this utility model more thorough and complete.

[0027] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0029] Example

[0030] like Figure 1-4 As shown, this utility model provides a technical solution: a spring pitch adjustment device, including a fixed base 1, the fixed base 1 having a self-locking drive structure inside, and two fixing structures at the connection of the self-locking drive structure for fixing the two ends of the spring being tested. The top of the fixed base 1 also has a protective structure for preventing the spring from breaking and popping out when the pitch is adjusted.

[0031] The fixed base 1 provides stable support for the entire device. The self-locking drive structure converts power into linear motion, driving the fixed structure to move and adjust the spring pitch. The fixed structure is mechanically connected to firmly fix both ends of the spring, ensuring that the spring does not move during adjustment. The protective structure forms a physical barrier through movable parts to prevent spring fragments from flying, ensuring operational safety. Additional features: The fixed base 1 is made of high-strength material and has shock-absorbing components at the bottom to reduce vibration during device operation and ensure adjustment accuracy. The self-locking drive structure is fixed to the fixed base 1 through high-precision positioning and connecting parts to ensure stable power transmission.

[0032] The self-locking drive structure includes a first drive motor 21, a worm gear 22 at the output end of the first drive motor 21, a turbine 23 at the connection of the worm gear 22, a bidirectional lead screw 24 at the center of the turbine 23, and two sliders 25 symmetrically arranged at the connection of the bidirectional lead screw 24. The working principle is as follows: when the first drive motor 21 is energized, it generates rotational power, driving the worm gear 22 to rotate. The worm gear 22 meshes with the turbine 23, causing the turbine 23 to rotate. The turbine 23 is fixedly connected to the bidirectional lead screw 24, thus causing the bidirectional lead screw 24 to rotate. The sliders 25 are threadedly connected to the bidirectional lead screw 24. When the bidirectional lead screw 24 rotates, the two sliders 25 move linearly in opposite directions, thereby adjusting the spacing of the fixed structure.

[0033] The first drive motor 21 has high precision and high response characteristics. The worm gear 22 and the turbine gear 23 are made of high-strength materials and precision machined to ensure tight meshing and improve transmission efficiency and stability. The double-acting screw 24 adopts a thread design suitable for transmission, which can provide greater thrust and ensure adjustment accuracy. The slider 25 and the double-acting screw 24 adopt a low-friction connection method to improve transmission efficiency and service life.

[0034] The fixing structure includes a fixing seat 31, a first raising seat 32 is provided at the center of the inner wall of the fixing seat 31, a connecting threaded rod 33 is provided inside the first raising seat 32, and a second raising seat 34 is provided on both sides of the first raising seat 32. A movable sleeve rod 35 is provided inside the two second raising seats 34.

[0035] The connecting threaded rod 33 is threadedly connected to the movable sleeve rod 35. When fixing the spring, place both ends of the spring in the appropriate position in the fixed seat 31, and rotate the connecting threaded rod 33. Since the first lifting seat 32 is fixed to the connecting threaded rod 33, the axial displacement of the connecting threaded rod 33 drives the movable sleeve rod 35 to move in the second lifting seat 34. One end of the movable sleeve rod 35 is designed to fit the shape of the spring support ring. By adjusting the extension length of the movable sleeve rod 35, it can be tightly fitted to the spring support ring to achieve locking and fixing. During the stretching or compression operation, the fixing structure relies on the friction between the movable sleeve rod 35 and the spring support ring and the fastening force of the threaded connection to prevent the spring from loosening or shifting. By controlling the rotation of the connecting threaded rod 33, the clamping force can be precisely adjusted to avoid insecure fixing or damage to the spring.

[0036] The fixed base 31 adopts a reinforced structural design to improve strength and stability. The first heightening base 32 and the second heightening base 34 are made of high-strength, wear-resistant and corrosion-resistant materials. One end of the connecting threaded rod 33 is equipped with a component that is easy to manually adjust, and a scale is set on it to easily display the adjustment amount. The end of the movable sleeve rod 35 is equipped with a component with an anti-slip and anti-damage spring. At the same time, the inner wall of the fixed base 31 is equipped with an auxiliary spring positioning structure to facilitate precise locking of the movable sleeve rod 35.

[0037] The protective structure includes a fixed frame 41, a second drive motor 42 is provided on the top of the fixed frame 41, a ball screw 43 is provided at the output end of the second drive motor 42, a linear optical axis 44 is provided on the right side of the ball screw 43, and sliding blocks 45 are installed on both the ball screw 43 and the linear optical axis 44. An acrylic protective cover 46 is provided between the two sliding blocks 45.

[0038] The second drive motor 42 drives the ball screw 43 to rotate. The sliding block 45 and the ball screw 43 are connected in a specific way to convert the rotation of the ball screw 43 into the linear motion of the sliding block 45. The linear optical axis 44 provides auxiliary support and guidance for the sliding block 45 to ensure smooth and accurate movement. The acrylic protective cover 46 is fixedly connected to the two sliding blocks 45 and moves with the sliding blocks 45. When the spring pitch is adjusted, it can move to a suitable position to form a protective barrier.

[0039] The mounting bracket 41 adopts a robust structure and rust-proof treatment. The second drive motor 42 can be precisely controlled by the control system to rotate, thereby precisely controlling the moving distance of the acrylic protective cover 46. The ball screw 43 and the linear optical axis 44 adopt a suitable design and processing technology to ensure the moving accuracy and smoothness of the protective cover. The acrylic protective cover 46 has high transparency and impact resistance, is easy to observe and can effectively block debris, and is also equipped with a structure that facilitates observation.

[0040] The first drive motor 21 drives the worm 22 to rotate. The worm 22 meshes with the turbine 23, and the turbine 23 is fixedly connected to the bidirectional lead screw 24, thereby driving the bidirectional lead screw 24 to rotate. The slider 25 is threadedly connected to the bidirectional lead screw 24.

[0041] Repeating the working principle of the self-locking drive structure described above, the rotational motion of the motor is converted into the linear motion of the slider 25 through the transmission and cooperation of various components, thereby realizing the power transmission and displacement control of the spring pitch adjustment.

[0042] A lubrication device is installed in the transmission parts of the worm 22 and the turbine 23 to reduce friction and wear. A component is provided between the first drive motor 21 and the worm 22 to compensate for coaxiality error, ensuring smooth power transmission. A component for monitoring position is installed on the slider 25 to feed the data back to the control system, realize closed-loop control, and improve adjustment accuracy.

[0043] The movable sleeve 35 passes through the threaded connection between the second heightening seat 34 and the connecting threaded rod 33. The first heightening seat 32 is fixedly connected to the connecting threaded rod 33. The movable sleeve 35 can move within the second heightening seat 34.

[0044] Repeating the working principle of the above-mentioned fixed structure, the position of the movable sleeve 35 is adjusted by the threaded transmission between the threaded rod 33 and the movable sleeve 35, thereby achieving the purpose of clamping and fixing the spring.

[0045] A friction-reducing component is provided at the connection between the threaded rod 33 and the first heightening seat 32. A guide structure is provided at the contact part between the movable sleeve rod 35 and the second heightening seat 34 to ensure the linear movement of the movable sleeve rod 35 and improve the stability and accuracy of the fixation. The fixed seat 31 is marked with markings to facilitate the adjustment of the fixing structure to adapt to different springs.

[0046] The second drive motor 42 drives the ball screw 43 to rotate, which in turn drives the sliding block 45 to move on the ball screw 43. The linear optical axis 44 is used to assist in supporting the sliding. The acrylic protective cover 46 is fixedly connected to the two sliding blocks 45.

[0047] Repeating the working principle of the above protective structure, the acrylic protective cover 46 is moved through the cooperation of various components, providing safety protection for the spring pitch adjustment process.

[0048] A component for adjusting the speed and torque is provided between the second drive motor 42 and the ball screw 43 to improve the smoothness of the protective cover movement. A component for reducing friction is provided at the contact part between the sliding block 45 and the linear optical axis 44 to improve sliding efficiency and service life.

[0049] Workflow

[0050] Place the support rings at both ends of the spring into the fixed seat 31, rotate the connecting threaded rod 33 to drive the movable sleeve rod 35 to move within the second heightening seat 34, so that the end of the movable sleeve rod 35 fits tightly against the spring support ring, thus achieving a firm fixation of the spring. This process precisely controls the clamping force through thread transmission, which can both stably fix the spring and avoid damage to the spring.

[0051] Adjusting the position of the protective cover: Start the second drive motor 42 to drive the ball screw 43 to rotate, which in turn drives the sliding block 45 to move on the ball screw 43 and the linear optical axis 44, thereby moving the acrylic protective cover 46 to the appropriate position to form a protective barrier and prevent the spring fragments from flying during subsequent adjustment.

[0052] Pitch adjustment: The first drive motor 21 is turned on, which drives the worm 22 to rotate. The worm 22 meshes with the worm gear 23, causing the worm gear 23 to drive the double-acting screw 24 to rotate. Since the slider 25 is threadedly connected to the double-acting screw 24, when the double-acting screw 24 rotates, the two sliders 25 move linearly in opposite directions, thereby driving the fixed structure to move and realize the stretching or compression adjustment of the spring pitch. During the adjustment process, the self-locking drive structure uses the self-locking characteristics of the worm gear 22 and worm gear 23 transmission to ensure the accuracy and stability of the pitch adjustment and prevent deviation.

[0053] Work completed: After the pitch adjustment is completed, turn off the drive motor, remove the protective device, loosen the fixing structure, and take out the spring to complete one spring pitch adjustment.

[0054] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A spring pitch adjustment device comprising a fixed base (1), characterised in that: The fixed base (1) is provided with a self-locking drive structure inside. The connection of the self-locking drive structure is provided with two fixing structures. The two fixing structures are used to fix the two ends of the spring being tested. The top of the fixed base (1) is also provided with a protective structure. The protective structure is used to prevent the spring from breaking and popping out when the spacing is adjusted.

2. The spring pitch adjustment device according to claim 1, characterized in that: The self-locking drive structure includes a first drive motor (21), a worm gear (22) is provided on the output end of the first drive motor (21), a turbine (23) is provided at the connection of the worm gear (22), a bidirectional lead screw (24) is located at the center of the turbine (23), and two sliders (25) are symmetrically provided at the connection of the bidirectional lead screw (24).

3. A spring pitch adjustment device according to claim 2, wherein: The fixing structure includes a fixing seat (31), a first raising seat (32) is provided at the center of the inner wall of the fixing seat (31), a connecting threaded rod (33) is provided inside the first raising seat (32), a second raising seat (34) is provided on both sides of the first raising seat (32), and a movable sleeve rod (35) is provided inside the two second raising seats (34).

4. A spring pitch adjustment device according to claim 3, wherein: The protective structure includes a fixed frame (41), a second drive motor (42) is provided on the top of the fixed frame (41), a ball screw (43) is provided at the output end of the second drive motor (42), a linear optical axis (44) is provided on the right side of the ball screw (43), and sliding blocks (45) are installed on both the ball screw (43) and the linear optical axis (44), and an acrylic protective cover (46) is provided between the two sliding blocks (45).

5. A spring pitch adjustment device according to claim 4, wherein: The first drive motor (21) drives the worm (22) to rotate. The worm (22) meshes with the turbine (23), and the turbine (23) is fixedly connected to the bidirectional lead screw (24), thereby driving the bidirectional lead screw (24) to rotate. The slider (25) is threadedly connected to the bidirectional lead screw (24).

6. A spring pitch adjustment device according to claim 5, wherein: The movable sleeve (35) is threaded through the second heightening seat (34) and the connecting threaded rod (33). The first heightening seat (32) is fixedly connected to the connecting threaded rod (33). The movable sleeve (35) can move within the second heightening seat (34).

7. A spring pitch adjustment device according to claim 6, wherein: The second drive motor (42) drives the ball screw (43) to rotate, thereby causing the sliding block (45) to move on the ball screw (43). The linear optical axis (44) is used to assist in supporting the sliding. The acrylic protective cover (46) is fixedly connected to the two sliding blocks (45).

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