A quick-change drill bit punching machine

Abstract

This utility model discloses a quick-change drill bit punching machine, which includes a spindle sleeve, elastic jaws, a push-pull ring, and a limiting locking plate. The spindle sleeve has a guide groove, and the elastic jaws are embedded in the groove. The push-pull ring is driven by an inclined surface to clamp or release the drill bit, and the limiting locking plate controls the stroke of the push-pull ring. The elastic jaws are equipped with a micro-tooth structure to enhance the locking force, a dust cover blocks foreign objects, the push-pull ring has an optimized anti-slip design, and the limiting locking plate has scale markings to indicate the locking status. This application can realize quick replacement of drill bits, improve locking reliability and operation convenience, and reduce maintenance difficulty, making it suitable for high-intensity operation needs.

Description

Technical Field

[0001] This utility model relates to the technical field of machining equipment, and in particular to a quick-change cutting head drilling machine. Background Technology

[0002] Current methods for replacing drill bit heads typically require auxiliary tools and multiple steps. For example, disassembling the bit head requires loosening the fixing bolts with a screwdriver and then manually removing the bit head; similar steps must be repeated during installation. This replacement method is time-consuming, especially in scenarios where different bit sizes are frequently changed, where efficiency becomes a significant issue. Furthermore, during operation, users may damage the bit head due to improper tool use or operational errors, affecting the normal operation and lifespan of the equipment.

[0003] To address these issues, a drilling machine with a quick-release mechanism for rapid cutter head replacement has been designed. However, traditional technology still has certain shortcomings. First, the locking force of the quick-release mechanism is limited, making it difficult to meet the demands of high-intensity operations. Second, the quick-release device requires high manufacturing precision, increasing production costs and making it susceptible to dust or foreign objects, leading to decreased reliability. Furthermore, some quick-release mechanisms have complex designs, making maintenance difficult and impacting the user experience. These problems limit the practical application of existing technologies and restrict their applicability. Utility Model Content

[0004] The purpose of this invention is to provide a quick-change drill bit punching machine to overcome the shortcomings of the existing technology.

[0005] To achieve the above objectives, this utility model provides the following technical solution: A quick-change drill bit replacement machine is proposed to solve the technical problems of long replacement time, insufficient locking force, poor reliability, and complex maintenance in existing technologies. By optimizing the quick-release structure design and introducing a new mechanical engagement principle, this invention provides a drill bit replacement solution that is easy to operate, has reliable locking, and is easy to maintain.

[0006] The core of this invention lies in a cutter head mounting assembly based on a bidirectional self-locking mechanism. This assembly includes a spindle sleeve, a set of elastic jaws, a push-pull ring, and a limiting locking disc. The spindle sleeve has a cylindrical cavity structure with several axially extending guide grooves on its inner wall to guide the movement of the elastic jaws. The number of elastic jaws matches the number of guide grooves, and each elastic jaw is embedded in its corresponding guide groove. The outer side of the elastic jaw has a protrusion for contacting the inner inclined surface of the push-pull ring; the inner side has an arc-shaped clamping surface for tightly fitting the tapered positioning section at the tail of the cutter head. The push-pull ring has an annular structure with a continuous inclined surface on its inner side. The angle of the inclined surface is precisely calculated to ensure that the push-pull ring can push the elastic jaws to radially contract or expand when moving axially. The limiting locking disc is located at the end of the spindle sleeve and is fixed by a threaded connection to limit the axial travel of the push-pull ring.

[0007] During the tool head installation process, first insert the tapered positioning section at the tail of the tool head into the center hole of the spindle sleeve. At this point, the arc-shaped clamping surface of the elastic pawl initially contacts the tapered positioning section at the tail of the tool head. Then, the user manually rotates the limiting locking disc, pushing it forward along the thread direction. The pushing action of the limiting locking disc causes the push-pull ring to move axially, and the inclined surface inside the push-pull ring gradually presses against the protrusion of the elastic pawl, causing the elastic pawl to retract inward and firmly clamp the tapered positioning section at the tail of the tool head. When the limiting locking disc rotates to the predetermined position, the clamping force of the elastic pawl reaches its maximum value, thus achieving a stable installation of the tool head. When disassembling the tool head, the user rotates the limiting locking disc in the opposite direction, retracting it along the thread direction. The push-pull ring then moves backward, reducing the pressure of its inner inclined surface on the elastic pawl. Under its own elastic force, the elastic pawl expands outward, releasing its clamping grip on the tail of the tool head, allowing the tool head to be easily removed.

[0008] To further improve locking force and reliability, this invention adds a micro-tooth structure to the arc-shaped clamping surface of the elastic claw. The tips of the micro-tooth structure face the tapered positioning section at the tail of the cutter head, which can embed into the cutter head surface during clamping, forming additional frictional resistance and thus significantly enhancing the locking effect. In addition, the elastic claw is made of high-strength spring steel and strengthened through heat treatment to ensure stable elasticity and wear resistance during long-term use.

[0009] To address the issue of traditional quick-release mechanisms being susceptible to dust or foreign objects, this invention incorporates a dust cover at the end of the spindle sleeve. The dust cover is a ring-shaped thin sheet structure; its inner edge fits tightly against the outer edge of the limiting locking disc, while its outer edge is secured to the spindle sleeve with clips. This dust cover effectively prevents external dust and foreign objects from entering the spindle sleeve, thereby improving the reliability of the entire quick-release mechanism. Furthermore, the dust cover is removable, facilitating regular cleaning and maintenance by the user.

[0010] This invention also optimizes the structure of the push-pull ring. A set of anti-slip ridges is provided on the outer side of the push-pull ring. The cross-section of the ridges is semi-circular and evenly distributed on the outer circumference of the push-pull ring. These anti-slip ridges not only improve the user's feel during operation but also increase the friction between the push-pull ring and the fingers, preventing operational errors caused by sweaty or oily hands. Furthermore, the inner beveled surface of the push-pull ring is precision polished, with a surface roughness controlled below Ra0.4 to reduce frictional wear between it and the elastic claw protrusions, extending its service life.

[0011] The design of the limit locking disc also reflects the innovation of this utility model. The outer edge of the limit locking disc has a ring of scale markings to indicate the current locking state. The scale markings are divided into several equal parts, each corresponding to a specific locking force level. Users can select the appropriate locking force level according to actual operational needs, thus balancing ease of operation and operational safety. Furthermore, the threaded portion of the limit locking disc adopts a trapezoidal thread design. Compared to ordinary triangular threads, trapezoidal threads have higher load-bearing capacity and smoother transmission performance, further improving the reliability of the quick-release mechanism.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: First, the bidirectional self-locking mechanism enables rapid installation and removal of the cutter head without the need for auxiliary tools, significantly reducing replacement time. Second, the combination of elastic jaws and micro-tooth structure significantly enhances locking force, meeting the demands of high-intensity operations. Third, the dust cover effectively blocks external dust and foreign objects, improving the reliability of the quick-release mechanism. Fourth, the optimized design of the push-pull ring and limit locking disc improves the user experience and reduces maintenance difficulty. Fifth, the overall structure is simple and compact, with low manufacturing costs, making it easy to promote and apply.

[0013] In summary, this utility model, through innovative mechanical cooperation principles and optimized structural design, successfully solves the problems of low cutting head replacement efficiency, insufficient locking force, poor reliability, and complex maintenance in the existing technology, providing an efficient, reliable, and economical solution for the rapid replacement of cutting heads in drilling machines. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0015] Figure 2 This is a cross-sectional view of the present invention.

[0016] Figure 3 This is a schematic diagram of the installation of the dust cover in this utility model.

[0017] Figure 4 This is a top view of the limiting locking disc in this utility model. The attached figures are labeled as follows: 1. Spindle sleeve; 2. Elastic chuck; 3. Push-pull ring; 4. Limit locking disc; 5. Cutting head; 6. Dust cover; 7. Guide groove; 8. Protrusion; 9. Arc-shaped clamping surface; 10. Micro-tooth structure. Detailed Implementation

[0018] The present invention will now be described in detail with reference to the embodiments shown in the accompanying drawings: A quick-change drill bit punching machine, the core structure of which consists of a spindle sleeve 1, elastic chucks 2, push-pull rings 3, limit locking discs 4, and dust covers 6. The specific embodiments of this utility model are described in detail below with reference to the accompanying drawings.

[0019] like Figure 1 As shown, the spindle sleeve 1 has a cylindrical cavity structure with several axially extending guide grooves 7 inside. The number of guide grooves 7 is the same as the number of elastic claws 2 and they are evenly distributed on the inner wall of the spindle sleeve 1. The elastic claws 2 are embedded in the guide grooves 7, and their outer sides have protrusions 8 for contacting and engaging with the inner inclined surface of the push-pull ring 3. The inner side of the elastic claw 2 has an arc-shaped clamping surface 9, which is designed to match the shape of the tapered positioning section at the tail of the cutter head 5. The push-pull ring 3 is an annular structure with continuous inclined surfaces on its inner side. The angle of the inclined surfaces is precisely calculated to ensure that the push-pull ring 3 can push the elastic claws 2 to contract or expand radially when moving axially. The outer side of the push-pull ring 3 has a set of anti-slip ridges, which are evenly distributed on the outer circumference of the push-pull ring 3 and have a semi-circular cross-section. The limiting locking disc 4 is located at the end of the spindle sleeve 1 and is fixed by a threaded connection. Its outer edge has a ring of scale markings to indicate the current locking status. The threaded portion of the limit locking disc 4 adopts a trapezoidal thread design. The dust cover 6 is an annular thin sheet structure, with its inner edge tightly fitting against the outer edge of the limit locking disc 4, and its outer edge fixed to the spindle sleeve 1 by a snap fastener.

[0020] In actual operation, the tapered positioning section at the tail of the cutter head 5 is first inserted into the center hole of the spindle sleeve 1. At this time, the tapered positioning section at the tail of the cutter head 5 initially contacts the arc-shaped clamping surface 9 of the elastic jaw 2, but no clamping force has yet been formed. Subsequently, the user manually rotates the limiting locking disc 4, causing it to move forward along the trapezoidal thread direction. The pushing action of the limiting locking disc 4 drives the push-pull ring 3 to move axially, and the inclined surface on the inner side of the push-pull ring 3 gradually squeezes the protrusion 8 of the elastic jaw 2, causing the elastic jaw 2 to retract inward and firmly clamp the tapered positioning section at the tail of the cutter head 5. When the limiting locking disc 4 is rotated to the predetermined position, the clamping force of the elastic jaw 2 reaches its maximum value, thereby achieving a stable installation of the cutter head 5. In this process, the micro-tooth structure 10 on the arc-shaped clamping surface 9 of the elastic jaw 2 plays a key role. Its tooth tips face the tapered positioning section at the tail of the cutter head 5 and embed into the surface of the cutter head 5 during the clamping process, further enhancing the clamping effect.

[0021] When disassembling the cutter head 5, the user rotates the limiting locking disc 4 in the opposite direction, causing it to retract along the trapezoidal thread. The push-pull ring 3 then moves backward, reducing the pressure of its inner inclined surface on the elastic claw 2. The elastic claw 2 expands outward under its own elastic force, releasing its grip on the tail of the cutter head 5, allowing it to be easily removed. During this process, the scale markings on the limiting locking disc 4 help the user accurately determine the locking status, preventing damage to components due to excessive rotation.

[0022] The dust cover 6 plays a crucial role in improving the reliability of the quick-release mechanism. For example... Figure 3 As shown, the inner edge of the dust cover 6 fits tightly against the outer edge of the limiting locking disc 4, and the outer edge is fixed to the spindle sleeve 1 by a snap fastener. This design effectively prevents external dust and foreign objects from entering the spindle sleeve 1, thereby protecting critical components such as the elastic claw 2 and the push-pull ring 3 from contamination. The dust cover 6 is detachable, allowing users to regularly clean and maintain it by removing the snap fastener, ensuring the long-term stable operation of the quick-release mechanism.

[0023] like Figure 2 As shown, the anti-slip ridges on the outer side of the push-pull ring 3 not only increase the friction between the user's fingers and the push-pull ring 3, but also improve the operating feel, especially maintaining good operational stability even in environments with sweaty or oily hands. The inner bevel of the push-pull ring 3 is precision polished, with a surface roughness controlled below Ra0.4, reducing frictional wear between it and the protrusion 8 of the elastic claw 2, and extending its service life.

[0024] like Figure 4 As shown, the outer edge of the limit locking disc 4 is divided into several equal parts, each corresponding to a specific locking force level. Users can select the appropriate locking force level according to actual operating needs, thus balancing ease of operation and operational safety. The trapezoidal thread design of the limit locking disc 4 has a higher load-bearing capacity and smoother transmission performance compared to ordinary triangular threads, further improving the reliability of the quick-release mechanism.

[0025] In practical applications, the quick-release mechanism of this invention is suitable for various types of drilling machines. For example, operators need to frequently change different specifications of cutting heads to adapt to different material processing requirements. Through the bidirectional self-locking mechanism design of this invention, operators can quickly change cutting heads without the need for auxiliary tools, significantly shortening preparation time. Simultaneously, the combination of the elastic claw 2 and the micro-tooth structure 10 significantly enhances the locking force, meeting the demands of high-intensity operations. The dust cover 6 effectively blocks external dust and foreign objects, improving the reliability of the quick-release mechanism. The optimized design of the push-pull ring 3 and the limit locking disc 4 improves the user's operating experience and reduces maintenance difficulty.

[0026] This utility model features a simple and compact overall structure, low manufacturing cost, and is easy to promote and apply. The elastic jaw 2 is made of high-strength spring steel and strengthened through heat treatment to ensure stable elasticity and wear resistance during long-term use. The threaded connection design of the spindle sleeve 1 and the limiting locking disc 4 has undergone rigorous testing to ensure reliable connection performance even under high-frequency use. The dust cover 6 is made of lightweight and durable materials, reducing overall weight while maintaining protective effectiveness.

[0027] During assembly, firstly, the elastic claws 2 are inserted one by one into the guide grooves 7 of the spindle sleeve 1, ensuring that the protrusion 8 of each elastic claw 2 is correctly aligned with the inner inclined surface of the push-pull ring 3. Then, the push-pull ring 3 is installed onto the end of the spindle sleeve 1, and its position is adjusted to ensure complete contact between the inner inclined surface and the protrusion 8 of the elastic claw 2. Next, the limiting locking disc 4 is fixed to the end of the spindle sleeve 1 via a trapezoidal thread connection, ensuring that its outer edge scale markings are clearly visible. Finally, the dust cover 6 is fixed to the spindle sleeve 1 with clips, and it is checked whether its inner edge fits tightly against the outer edge of the limiting locking disc 4.

[0028] During maintenance, users can clean the inside of the spindle sleeve 1 by removing the dust cover 6. Regularly check the wear of the elastic pawl 2 and replace it if necessary. The inner bevel of the push-pull ring 3 should be regularly lubricated to reduce friction loss. The trapezoidal thread of the limit locking disc 4 should be kept clean to prevent a decrease in locking force due to dust or foreign objects. These maintenance measures ensure the long-term stable operation of the quick-release mechanism and meet the demands of high-intensity operations.

[0029] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as the combination of these technical features does not contradict each other, it should be considered within the scope of this specification. For those skilled in the art, several modifications and improvements can be made without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A quick-change drill bit punching machine, characterized in that: The device includes a spindle sleeve (1), an elastic pawl (2), a push-pull ring (3), and a limiting locking disc (4). The spindle sleeve (1) is a cylindrical cavity structure with several axially extending guide grooves (7) on its inner wall. The elastic pawl (2) is embedded in the guide groove (7). The outer side of the elastic pawl (2) has a protrusion (8), and the inner side has an arc-shaped clamping surface (9). The push-pull ring (3) is an annular structure with a continuous inclined surface on its inner side. The inclined surface of the push-pull ring (3) contacts and cooperates with the protrusion (8) of the elastic pawl (2). The limiting locking disc (4) is fixed to the end of the spindle sleeve (1) by a threaded connection. The limiting locking disc (4) is used to limit the axial travel of the push-pull ring (3).

2. The quick-change drill bit punching machine as described in claim 1, characterized in that: The elastic jaw (2) has a micro-tooth structure (10) on its arc-shaped clamping surface (9), with the tooth tip of the micro-tooth structure (10) facing the tapered positioning section at the tail of the cutter head (5).

3. A quick-change drill bit punching machine as described in claim 1, characterized in that: A set of anti-slip ridges is provided on the outer side of the push-pull ring (3). The anti-slip ridges are evenly distributed on the outer circumference of the push-pull ring (3), and the cross section of the anti-slip ridges is semi-circular.

4. A quick-change drill bit punching machine as described in claim 1, characterized in that: The outer edge of the limiting locking disc (4) is marked with a scale, which is divided into several equal parts. Each part corresponds to a specific locking force level. The threaded part of the limiting locking disc (4) adopts a trapezoidal thread design.

5. A quick-change drill bit punching machine as described in claim 1, characterized in that: It also includes a dust cover (6), which is a ring-shaped thin sheet structure. Its inner edge is closely fitted with the outer edge of the limiting locking disc (4), and its outer edge is fixed to the main shaft sleeve (1) by a buckle.

6. A quick-change drill bit punching machine as described in claim 1, characterized in that: The elastic claw (2) is made of high-strength spring steel and is strengthened by heat treatment.

7. A quick-change drill bit punching machine as described in claim 1, characterized in that: The inner bevel of the push-pull ring (3) is precision polished, and the surface roughness is controlled to be below Ra0.

4.

8. A quick-change drill bit punching machine as described in claim 1, characterized in that: The central hole of the spindle sleeve (1) is used to accommodate the tapered positioning section of the tail of the cutter head (5), and the tapered positioning section of the tail of the cutter head (5) matches the arc-shaped clamping surface (9) of the elastic chuck (2).

9. A quick-change drill bit punching machine as described in claim 1, characterized in that: The rotation direction of the limiting locking disc (4) is used to control the axial movement of the push-pull ring (3), thereby enabling the elastic pawl (2) to clamp or release the tail of the cutter head (5).

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