Centering apparatus for leaf springs

Abstract

The application relates to a steel plate spring center hole forming device and belongs to the technical field of steel plate spring machining, which comprises a supporting seat, the upper end of the supporting seat being provided with a hydraulic push rod; the steel plate spring center hole forming device realizes the central clamping of the supporting seat on the steel plate, guarantees the center of the steel plate to be concentric with a drill bit, drills the steel plate as the drill bit moves downward, makes the outer cover adhere to the steel plate to bear the reaction force, makes the outer cover move upward on the guide column, compresses the stainless steel spring, and when the drilling is performed, the cooling liquid nozzle is connected with a cooling liquid supply system to perform spraying cooling, guarantees that the drilling debris and liquid are located in the outer cover, the drill bit moves upward after the drilling is completed, the stainless steel spring is stretched and reset, when the drill bit is separated from the drilling hole, waste liquid and debris are discharged into the storage seat through the drilling hole and the reserved hole to be stored, so that the drilling positioning effect and efficiency are improved, the collection and treatment of the debris and waste liquid are realized, and the machining environment is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of steel leaf spring processing technology, specifically to a steel leaf spring center hole forming device. Background Technology

[0002] Automotive leaf springs, also known as leaf springs, are common elastic elements in automotive suspension systems. They are mostly used in non-independent suspension structures, especially in medium and large trucks. They are mainly made of alloy steels such as 60Si2Mn and 50CrV, and are processed through processes such as blanking, earing, quenching, and shot peening to form multiple stacked alloy springs of unequal length and curvature, which together form an elastic beam with approximately equal strength.

[0003] When drilling the center hole of a leaf spring, a vertical drilling machine is used to drill the steel plate. During drilling, the worker places the steel plate on the processing table for alignment and stabilization. The existing technology has the following technical defects: First, it is impossible to center and fix the placed steel plate for drilling. Second, the coolant and debris generated during drilling cannot be treated, polluting the processing environment. Therefore, we propose a center hole forming device for leaf springs to solve these technical defects. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a device for forming a center hole in a leaf spring.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a steel leaf spring center hole forming device, including a support base, a hydraulic push rod at the upper end of the support base, the hydraulic push rod pushing a gearbox to move within the support base, a drive motor connected to the upper end of the gearbox, a drill bit at the output end of the gearbox, a placement platform at the middle of the upper end of the support base, a pre-drilled hole at the middle of the placement platform, a second hydraulic push rod embedded on the left and right sides of the placement platform, a loading platform at the push rod of the second hydraulic push rod, a clamping seat detachably provided at the upper end of the loading platform, and slots of equal length and width to the cross-section of the steel plate provided opposite to the clamping seat;

[0006] The lower end of the placement platform is detachably equipped with a storage base, which is connected to the reserved hole;

[0007] A pair of guide posts are provided at the lower end of the gearbox. An outer cover slides between the guide posts. The outer cover is concentric with the drill bit and the reserved hole and is passed through by the drill bit. A stainless steel spring is provided between the outer cover and the gearbox. The stainless steel spring is located outside the guide posts. A coolant nozzle is provided on the outer cover and extends into its interior.

[0008] Using the above technical solution, the hydraulic pusher pushes the clamping seats on the loading platform to move synchronously in opposite directions, allowing the slots on the clamping seats to be inserted at both ends of the steel plate. This achieves centered clamping of the steel plate, ensuring that the center of the steel plate is concentric with the drill bit. During drilling, the hydraulic pusher on the support base works, pushing the gearbox and drill bit to move downwards synchronously. The drive motor and gearbox work together to drive the drill bit to rotate, ensuring that the outer cover moves downwards synchronously with the drill bit. The outer cover first contacts the upper surface of the clamped steel plate, and then moves downwards as the drill bit moves further. Drilling into the steel plate causes the outer cover to adhere to the plate under reaction force, moving it upwards on the guide post and compressing the stainless steel spring. During drilling, a coolant nozzle connected to the cooling supply system sprays water to cool the plate, ensuring that drilling debris and liquid remain inside the outer cover. After drilling is complete, the drill bit moves upwards, and the stainless steel spring extends and returns to its original position. When the drill bit leaves the borehole, waste liquid and debris are discharged through the borehole and pre-drilled holes into the storage base for storage. This improves drilling positioning effectiveness and efficiency, achieves collection and treatment of debris and waste liquid, and ensures a safe processing environment.

[0009] As a preferred embodiment of this utility model, a support column is provided between the top and bottom walls of the inner cavity of the support seat, and the support column passes through the gearbox.

[0010] Using the above technical solution, the support column allows the gearbox to slide up and down in a directional manner, ensuring the stable up and down movement of the gearbox.

[0011] As a preferred embodiment of this utility model, a pair of movable columns are slidably mounted on the left and right sides of the placement platform, and the other end of the movable columns is connected to the loading platform.

[0012] Using the above technical solution, the moving column can stably support the lateral movement of the loading platform.

[0013] As a preferred embodiment of this utility model, the front end of the storage base is connected to a drain pipe, and the outside of the drain pipe is connected to a manual switch valve.

[0014] Using the above technical solution, the debris and waste liquid stored in the storage compartment can be discharged through the drain pipe by opening the manual switch valve.

[0015] In a preferred embodiment of this invention, when the guide post is in its naturally extended state, the lower surface of the outer cover is lower than the lower surface of the drill bit; when the guide post is in its retracted state, the lower surface of the outer cover is higher than the lower surface of the drill bit.

[0016] By adopting the above technical solution, it is ensured that when the drill bit moves down, the outer cover first contacts the steel plate, and that the drill bit can continue to drill holes in the steel plate.

[0017] As a preferred technical solution of this utility model, the upper end of the placement platform is provided with a lower sealing ring, the lower sealing ring being concentric with the reserved hole, and the lower end of the outer cover is provided with an upper sealing ring concentric with the outer hole.

[0018] The lower sealing ring is flush with the bottom wall of the inner cavity of the clamping seat.

[0019] By adopting the above technical solution, the lower sealing ring is in close contact with the lower surface of the steel plate to ensure the sealing performance of the lower sealing ring and prevent leakage, while the upper sealing ring ensures the sealing effect of the outer cover with the upper surface of the steel plate to prevent leakage.

[0020] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0021] The steel plate spring center drilling equipment uses a hydraulic pusher to push the clamping seats on the loading platform to move synchronously in opposite directions, so that the slots on the clamping seats allow the two ends of the steel plate to be inserted, thereby achieving the clamping seats to clamp the steel plate in the center and ensuring that the center of the steel plate is concentric with the drill bit.

[0022] During drilling, the hydraulic push rod on the support base moves the gearbox and drill bit downwards synchronously. The drive motor and gearbox work together to rotate the drill bit, ensuring that the outer cover moves downwards synchronously with the drill bit. The outer cover first contacts the upper surface of the clamped steel plate. As the drill bit moves downwards and drills into the steel plate, the outer cover adheres to the steel plate and is subjected to a reaction force, causing the outer cover to move upwards on the guide post, compressing the stainless steel spring. During drilling, the coolant nozzle is connected to the cooling supply system to spray and cool the water, ensuring that the drilling debris and liquid are contained within the outer cover. After drilling is completed, the drill bit moves upwards, and the stainless steel spring extends and returns to its original position. When the drill bit disengages from the borehole, the waste liquid and debris are discharged into the storage base through the borehole and the reserved hole for storage, thereby improving the drilling positioning effect and efficiency, achieving the collection and treatment of debris and waste liquid, and ensuring a safe processing environment. Attached Figure Description

[0023] Figure 1 This is a perspective view of the present utility model;

[0024] Figure 2 This is a front view of the present invention;

[0025] Figure 3 This is a rear-view perspective view of the present invention.

[0026] In the diagram: 1. Support base; 2. Hydraulic push rod; 3. Gearbox; 4. Support column; 5. Drive motor; 6. Drill bit; 7. Placement platform; 8. Reserved hole; 9. Second hydraulic push rod; 10. Loading platform; 11. Moving column; 12. Clamping seat; 13. Storage seat; 14. Drain pipe; 15. Manual switch valve; 16. Guide column; 17. Outer cover; 18. Stainless steel spring; 19. Coolant nozzle; 20. Lower sealing ring; 21. Upper sealing ring. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] Please see Figures 1 to 3 The leaf spring center hole forming device in this embodiment includes a support base 1, a hydraulic system, a transmission system, a clamping system, and a debris collection system. The specific structure and connection relationship are as follows:

[0029] The support base 1 serves as the basic frame of the equipment and is made of high-strength cast iron. A support column 4 is vertically fixed between the top and bottom walls of its inner cavity. The support column 4 passes through the gearbox 3 and provides guiding support for the directional sliding of the gearbox 3.

[0030] The hydraulic system includes:

[0031] Hydraulic push rod 2 is installed and fixed on the upper surface of support base 1, and its piston rod is connected and fixed to the top of gearbox 3. Hydraulic drive pushes gearbox 3 to move up and down along support column 4.

[0032] The hydraulic push rod 29 is embedded and fixed on the left and right sides of the placement platform 7, and its piston rod is connected and fixed to the loading platform 10. It is driven by hydraulic power to push the loading platform 10 to move laterally.

[0033] The transmission system includes:

[0034] The drive motor 5 is mounted and fixed on the upper surface of the gearbox 3, and is connected to the input shaft of the gearbox 3 through a coupling to provide rotational power;

[0035] The gearbox 3 is equipped with a reduction gear set, which converts the high-speed rotation of the drive motor 5 into the low-speed, high-torque output required by the drill bit 6;

[0036] The drill bit 6 is mounted and fixed at the output end of the gearbox 3. It is made of cemented carbide and its axis is coaxial with the center of the reserved hole 8.

[0037] The clamping system includes:

[0038] The placement platform 7 is fixed to the middle of the upper surface of the support base 1. A lower sealing ring 20 is fixed on its upper surface. The placement platform 7 has a reserved hole 8. The lower sealing ring 20 is concentric with the reserved hole 8 and fits and seals against the lower surface of the steel plate to prevent coolant leakage. Movable columns 11 are slidably installed inside the left and right sides of the placement platform 7. The other end of the movable column 11 is connected and fixed to the loading platform 10 to provide lateral movement support for the loading platform 10.

[0039] The loading platform 10 is installed and fixed to the end of the piston rod of the hydraulic push rod 2 9. The upper end of the platform is detachably connected to the clamping seat 12. The clamping seat 12 is connected and fixed by bolts, which makes it easy to replace the clamping seat 12 with a suitable inner cavity size according to the cross-sectional length and width of the steel plate.

[0040] The clamping base 12 has slots on opposite sides that are the same length and width as the cross-section of the steel plate. The steel plate is clamped in the center by inserting the slots into both ends of the steel plate.

[0041] The debris collection system includes:

[0042] The storage base 13 is detachably installed and fixed to the lower surface of the placement platform 7 by bolts. Its interior is connected to the reserved hole 8, and its front end is connected to the drain pipe 14. The drain pipe 14 is connected to a manual switch valve 15 to facilitate cleaning of waste liquid and debris in the storage base 13.

[0043] The outer cover 17 is slidably mounted between a pair of guide posts 16 symmetrically distributed around the drill bit 6, which are fixed at the lower end of the gearbox 3. An upper sealing ring 21 is fixed at the lower end of the outer cover 17 and is fitted to the upper surface of the steel plate to seal and further prevent coolant leakage. The upper sealing ring 21 and the lower sealing ring 20 cooperate to form a sealed space. A stainless steel spring 18 is fixed between the outer cover 17 and the gearbox 3. The stainless steel spring 18 is sleeved on the outside of the guide posts 16 and is used to compress the outer cover 17 when it is under pressure and to extend and reset when the external force is removed. A coolant nozzle 19 is fixed to the side wall of the outer cover 17 and extends into its interior. The coolant nozzle 19 is connected to an external coolant supply system through a flexible pipe to spray coolant during drilling, reduce the temperature of the drill bit, and reduce the splashing of debris.

[0044] When the guide post 16 is in its naturally extended state, the lower surface of the outer cover 17 is lower than the lower surface of the drill bit 6. When the guide post 16 is in its retracted state, the lower surface of the outer cover 17 is higher than the lower surface of the drill bit 6, ensuring that when the drill bit 6 moves down, the outer cover 17 first contacts the steel plate, and ensuring that the drill bit 6 can continue to drill into the steel plate.

[0045] The lower sealing ring 20 is aligned with the bottom wall of the inner cavity of the clamping seat 12.

[0046] Both the lower sealing ring 20 and the upper sealing ring 21 are elastic rubber sealing rings.

[0047] To further improve the automation level and ease of operation of the equipment, this utility model can be equipped with a control system, which includes components such as a controller and an actuator, and is specifically implemented as follows:

[0048] The controller uses a PLC or microcontroller as the core control unit, which is responsible for receiving sensor signals and controlling the actions of the actuators.

[0049] The actuators include hydraulic push rod 2 and hydraulic push rod 9, etc., which perform corresponding actions according to the controller's instructions to achieve operations such as clamping and drilling of steel plates.

[0050] Through the control system, operators can input operating commands via touch screen or buttons. The controller then controls the various actuators to work together in accordance with the commands, thereby achieving automated drilling of the center hole of the leaf spring.

[0051] Usage steps,

[0052] The operator places the steel plate spring to be drilled on the placement table 7, ensuring that both ends of the steel plate are aligned with the slots of the clamping seat 12.

[0053] The control system activates hydraulic push rod 29, which pushes loading platform 10 to move synchronously in opposite directions, so that the slots of clamping seat 12 clamp the two ends of the steel plate, thus achieving centered clamping of the steel plate.

[0054] The control system activates the hydraulic push rod 2, which pushes the gearbox 3 and drill bit 6 to move down synchronously. At the same time, the drive motor 5 is activated, which drives the drill bit 6 to rotate through the transmission mechanism.

[0055] During the downward movement of drill bit 6, the upper sealing ring 21 on the outer cover 17 first contacts and seals against the upper surface of the steel plate, and the lower sealing ring 20 contacts and seals against the lower surface of the steel plate. As drill bit 6 continues to move downward, the outer cover 17 moves upward on the guide post 16 under the reaction force, compressing the stainless steel spring 18.

[0056] At the same time, the coolant nozzle 19 begins to spray coolant to reduce the drill bit temperature and reduce debris splashing. The debris and coolant generated during drilling are blocked and collected inside the outer cover 17.

[0057] After the drill bit 6 completes drilling, the hydraulic push rod 2 is controlled by the control system to move the drill bit 6 upward, the stainless steel spring 18 extends and resets, and the outer cover 17 moves downward accordingly.

[0058] When the drill bit 6 is removed from the borehole, the waste liquid and debris are discharged into the storage base 13 through the borehole and the reserved hole 8 for storage.

[0059] Operators can open the manual switch valve 15 to discharge the debris and waste liquid stored in the storage seat 13 through the drain pipe 14 for cleaning and treatment.

[0060] Working principle

[0061] This invention uses a hydraulic push rod 29 to push the clamping seat 12 on the loading platform 10 to move synchronously in opposite directions, thereby achieving centered clamping of the steel plate and ensuring that the center of the steel plate is concentric with the drill bit 6. During drilling, the hydraulic push rod 2 pushes the gearbox 3 and the drill bit 6 to move downwards synchronously. The drive motor 5 drives the drill bit 6 to rotate through the transmission mechanism. During the downward movement of the drill bit 6, the outer cover 17 first contacts and seals against the steel plate. As the drill bit 6 continues to drill, the outer cover 17 moves upwards under the reaction force and compresses the stainless steel spring 18. The coolant nozzle 19 sprays coolant to reduce the temperature of the drill bit and reduce debris splashing. After drilling is completed, the drill bit 6 moves upwards, the stainless steel spring 18 extends and returns to its original position, and the waste liquid and debris are discharged into the storage seat 13 through the drill hole and the reserved hole 8 for storage. Through the above structural design and working principle, this invention achieves precise drilling of the center hole of the steel plate spring and effective collection and treatment of debris and coolant.

[0062] Beneficial effects

[0063] Accurate positioning: The centered clamping design of the clamping seat 12 ensures that the center of the steel plate is concentric with the drill bit 6, improving drilling positioning accuracy and product quality.

[0064] Effective collection of debris and coolant: The design of the outer cover 17 effectively blocks the splashing of debris and coolant generated during drilling, and collects and processes them through the reserved hole 8 and the storage seat 13, keeping the processing environment clean.

[0065] High degree of automation: By equipping a control system, the drilling of the center hole of the leaf spring is automated, which improves production efficiency and ease of operation.

[0066] Stable and reliable structure: Through reasonable structural design and positional connection of each component, the stability and reliability of the equipment are ensured, reducing the failure rate and maintenance costs.

[0067] All electrical components mentioned in the text are electrically connected to the main controller and power supply. The main controller can be a conventional known device such as a computer that performs control functions, and the existing publicly available power connection technologies are not described in detail in the text.

[0068] 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 device for center drilling of a leaf spring, comprising a support base, a hydraulic push rod at the upper end of the support base, the hydraulic push rod driving a gearbox to move within the support base, a drive motor connected to the upper end of the gearbox, and a drill bit at the output end of the gearbox, characterized in that... The support base has a placement platform at the middle of its upper end. The placement platform has a reserved hole in the middle. Hydraulic push rods 2 are embedded and installed on the left and right sides of the placement platform. The push rod of the hydraulic push rod 2 is equipped with a loading platform. The upper end of the loading platform is detachably equipped with a clamping seat. The clamping seat is equipped with a slot with the same length and width as the steel plate cross section. The lower end of the placement platform is detachably equipped with a storage base, which communicates with the reserved hole; A pair of guide posts are provided at the lower end of the gearbox. An outer cover slides between the guide posts. The outer cover is concentric with the drill bit and the reserved hole and is passed through by the drill bit. A stainless steel spring is provided between the outer cover and the gearbox. The stainless steel spring is located outside the guide posts. A coolant nozzle is provided on the outer cover and extends into its interior.

2. The steel leaf spring center hole forming equipment according to claim 1, characterized in that: A support column is provided between the top and bottom walls of the inner cavity of the support seat, and the support column passes through the gearbox.

3. The steel leaf spring center hole forming equipment according to claim 1, characterized in that: A pair of movable columns slide inside the left and right sides of the placement platform, and the other end of the movable columns is connected to the loading platform.

4. The steel leaf spring center hole forming equipment according to claim 1, characterized in that: The front end of the storage base is connected to a drain pipe, and the outside of the drain pipe is connected to a manual switch valve.

5. The steel leaf spring center hole forming equipment according to claim 1, characterized in that: When the guide post is in its naturally extended state, the lower surface of the outer cover is lower than the lower surface of the drill bit; when the guide post is in its retracted state, the lower surface of the outer cover is higher than the lower surface of the drill bit.

6. The steel leaf spring center hole forming equipment according to claim 1, characterized in that: The upper end of the placement platform is provided with a lower sealing ring, which is concentric with the reserved hole. The lower end of the outer cover is provided with an upper sealing ring concentric with the hole. The lower sealing ring is flush with the bottom wall of the inner cavity of the clamping seat.

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