Special chuck for right-angle handle twist drill

Abstract

The utility model relates to the technical field of twist drills, in particular to a chuck special for a right-angle handle twist drill. The drill bit comprises a drill bit body, the arc surface of the drill bit body is in sliding connection with a main shaft, the arc surface of the main shaft is in sliding connection with a sliding sleeve, one side of the sliding sleeve is fixedly connected with a left end cover, the left end cover is in sliding connection with the arc surface of the drill bit body, and the side, away from the left end cover, of the sliding sleeve is fixedly connected with a right end cover. The right end cover is in sliding connection with the arc face of the main shaft, the arc face of the main shaft is fixedly connected with two clamping springs, the arc face of the drill bit is fixedly connected with a second spring, and the end, away from the drill bit, of the second spring is fixedly connected with a clamping tongue. The problems that when a worker needs to use a drill bit, a nut needs to be tightened through a tightening tool wrench for connection of the drill bit and a main shaft, the workload of the worker is increased, meanwhile, due to long-time vibration of the drill bit, the nut is loosened, clamping force is ordinary, and normal use of the drill bit by the worker is affected are solved.

Description

Technical Field

[0001] This utility model relates to the field of twist drill technology, and in particular to a special chuck for right-angle shank twist drills. Background Technology

[0002] A twist drill is a cutting tool that machines holes by rotating and cutting. Its shape resembles a twisted rope and mainly consists of three parts: the working part, the neck, and the shank. A twist drill chuck is a device used to hold the twist drill, securely fixing it to the spindle of a machine tool (such as a drilling machine or milling machine) or a handheld power tool (such as a pistol drill). It ensures the concentricity, stability, and axial positioning of the twist drill during operation and is an essential component for precise drilling operations. Existing screw side-locking chucks require tightening tools and are prone to loosening due to vibration. Another option, nut locking, requires a special wrench and generally offers limited clamping force.

[0003] The inventors believe that the following defects often exist: existing screw side-locking chucks require the use of tightening tools and are prone to loosening due to vibration; another type of nut locking requires a special wrench, and the clamping force is generally weak. When operators need to use the drill bit, the connection between the drill bit and the spindle requires tightening the nut with a tightening tool wrench, which increases the workload of the operators. At the same time, long-term drill bit vibration can cause the nut to loosen and the clamping force is generally weak, thus affecting the normal use of the drill bit by the operators. Therefore, a special chuck for right-angle shank twist drills is proposed to address the above problems. Utility Model Content

[0004] The purpose of this utility model is to solve the problems in the existing technology where the connection between the drill bit and the spindle requires the use of a tightening tool wrench to tighten the nut, which increases the workload of the operator. At the same time, long-term drill bit vibration can cause the nut to loosen and the clamping force to be weak, thus affecting the operator's normal use of the drill bit. Therefore, a special chuck for right-angle shank twist drills is proposed.

[0005] To achieve the above objectives, this utility model adopts the following technical solution: a chuck for right-angle shank twist drills, comprising a drill bit, a spindle slidably connected to the arc surface of the drill bit, a sliding sleeve slidably connected to the arc surface of the spindle, a left end cap fixedly connected to one side of the sliding sleeve, the left end cap slidably connected to the arc surface of the drill bit, a right end cap fixedly connected to the side of the sliding sleeve away from the left end cap, the right end cap slidably connected to the arc surface of the spindle, two retaining springs fixedly connected to the arc surface of the spindle, a second spring fixedly connected to the arc surface of the drill bit, and a retaining tongue fixedly connected to the end of the second spring away from the drill bit.

[0006] The aforementioned components achieve the following effects: they enable quick and stable installation of drill bits, avoiding the need for workers to tighten the nuts on the drill bit and spindle when they need to use the drill bit, thus reducing the workload for workers. Additionally, prolonged drill bit vibration can cause the nuts to loosen and the clamping force to weaken, thereby affecting the normal use of the drill bit by workers. This improves the practicality of the device.

[0007] Preferably, a first spring is fitted onto the arc surface of the spindle, and the two ends of the first spring are respectively slid sleeves and fixedly connected to the spindle.

[0008] The aforementioned components achieve the following effects: they automatically lock the drill bit, making the drill bit's position more stable, while reducing the number of steps required for operators to use the device and improving their work efficiency.

[0009] Preferably, the arc surface of the sliding sleeve is slidably connected to a protective sleeve, and the protective sleeve is made of rubber.

[0010] The aforementioned components achieve the following effect: they protect idle drill bits, preventing them from being impacted or covered in dust, thus avoiding any impact on the operator's use of the drill bits.

[0011] Preferably, a fixing rod is fixedly connected to the surface of the protective sleeve, an operating plate is slidably connected to the arc surface of the fixing rod, an insertion rod is fixedly connected to one side of the operating plate, and a slot is provided on the arc surface of the sliding sleeve.

[0012] The aforementioned components achieve the following effect: they reinforce and limit the protective sleeve, preventing the protective sleeve from detaching from the arc surface of the sliding sleeve due to shaking caused by the transfer of the drill bit and spindle, thus affecting the protective effect of the protective sleeve.

[0013] Preferably, a limiting plate is fixedly connected to the end of the fixing rod away from the protective sleeve, and the size of the insertion rod is adapted to the size of the sliding sleeve slot.

[0014] The effect achieved by the above components is that the limiting plate restricts the maximum sliding distance of the operating plate on the arc surface of the fixed rod, thus preventing the operating plate from detaching from the arc surface of the fixed rod due to excessive pulling force when the operator pulls it.

[0015] Preferably, a third spring is fitted onto the arc surface of the fixing rod, and the two ends of the third spring are fixedly connected to the operating plate and the protective sleeve, respectively.

[0016] The effect achieved by the above components is that the third spring improves the stability of the insertion rod in limiting the protective sleeve, thereby increasing the stability of the protective sleeve in protecting the drill bit.

[0017] Preferably, a screw is fixedly connected to the side of the protective sleeve near the fixing rod, and a support plate is threadedly connected to the arc surface of the screw.

[0018] The aforementioned components achieve the following effect: the support plate restricts the movement of the operating panel, preventing the rod and the sliding sleeve from continuously rubbing against each other when the operator removes the protective cover, thus avoiding damage to the rod or the sliding sleeve.

[0019] In summary, the beneficial effects of this utility model are as follows:

[0020] This invention achieves the effect of quick and stable installation of drill bits, avoiding the need for workers to tighten the nut between the drill bit and the spindle with a tightening tool wrench when they need to use the drill bit, which increases the workload of the workers. At the same time, long-term drill bit vibration can cause the nut to loosen and the clamping force to be weak, thus affecting the normal use of the drill bit by the workers. This invention improves the practicality of the device. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0022] Figure 2 In this utility model Figure 1 A sectional view;

[0023] Figure 3 This is a schematic diagram of the structure of the protective sleeve in this utility model.

[0024] Legend: 1. Drill bit; 2. Left end cap; 3. Snap ring; 4. Spindle; 5. Right end cap; 6. Sliding sleeve; 7. First spring; 8. Clasp; 9. Second spring; 10. Protective sleeve; 11. Fixing rod; 12. Operating panel; 13. Insert rod; 14. Limiting plate; 15. Third spring; 16. Screw; 17. Support plate. Detailed Implementation

[0025] Reference Figure 1-3As shown, this utility model provides a technical solution: a chuck for right-angle shank twist drills, including a drill bit 1. A spindle 4 is slidably connected to the arc surface of the drill bit 1. A sliding sleeve 6 is slidably connected to the arc surface of the spindle 4. A left end cap 2 is fixedly connected to one side of the sliding sleeve 6, and the left end cap 2 is slidably connected to the arc surface of the drill bit 1. A right end cap 5 is fixedly connected to the side of the sliding sleeve 6 away from the left end cap 2, and the right end cap 5 is slidably connected to the arc surface of the spindle 4. Two retaining springs 3 are fixedly connected to the arc surface of the spindle 4. A second spring 9 is fixedly connected to the arc surface of the drill bit 1. A latch 8 is fixedly connected to the end of the second spring 9 away from the drill bit. When the operator needs to use the drill bit 1, pressing the latch 8 compresses the second spring 9, inserting the drill bit 1 into the spindle 4. At this time, the sliding sleeve 6 slides to the left. This causes the sliding sleeve 6 to slide to the left on the arc surface of the main spindle 4. The sliding sleeve 6 drives the left end cover 2 to move, and the left end cover 2 and the latch 8 are pressed together. The latch 8 drives the second spring 9 to compress until the left end cover 2 passes the latch 8. At this time, the rebound force of the second spring 9 drives the latch 8 to move upward and push it out. At this time, the latch 8 blocks the left end cover 2 from moving to the right. This achieves the effect of quick and stable installation of drill bit 1, avoiding the need for workers to use a tightening tool or wrench to tighten the nut when using drill bit 1 and connecting it to the main spindle 4, which increases the workload of workers. At the same time, long-term vibration of drill bit 1 can cause the nut to loosen and the clamping force to be weak, which will affect the normal use of drill bit 1 by workers. This improves the practicality of the device. The arc surface of the main spindle 4 is fitted with the second spring 9. A spring 7 has two ends fixedly connected to a sliding sleeve 6 and a main shaft 4, respectively. When the operator releases the sliding sleeve 6, the rebound force of the first spring 7 drives the sliding sleeve 6 to move. At the same time, the sliding sleeve 6 drives the left end cover 2 to move until the left end cover 2 abuts against the latch 8. At this point, the drill bit 1 is automatically locked, making the limiting of the drill bit 1 more stable. This also reduces the operator's operation steps and improves the operator's work efficiency. A protective sleeve 10 is slidably connected to the arc surface of the sliding sleeve 6. The protective sleeve 10 is made of rubber. When the operator does not need to use the drill bit 1, the protective sleeve 10 is opened and placed on the drill bit 1. At the same time, the contraction force of the rubber material of the protective sleeve 10 causes the protective sleeve 10 to contract on the arc surface of the sliding sleeve 6, thus achieving the effect of locking the drill bit 1. The protective sleeve 10 protects the idle drill bit 1, preventing it from being impacted or covered in dust, which could hinder its use by the operator. A fixing rod 11 is fixedly connected to the surface of the protective sleeve 10. An operating plate 12 is slidably connected to the arc surface of the fixing rod 11. A insertion rod 13 is fixedly connected to one side of the operating plate 12. A slot is provided on the arc surface of the sliding sleeve 6. When the operator puts the protective sleeve 10 on the drill bit 1, they push the operating plate 12, causing it to slide on the arc surface of the fixing rod 11. Simultaneously, the operating plate 12 moves the insertion rod 13 until it inserts into the slot of the sliding sleeve 6. This achieves the effect of reinforcing and limiting the protective sleeve 10, preventing damage when the operator moves the drill bit 1 and spindle 4.The shaking caused by the transfer causes the protective sleeve 10 to detach from the arc surface of the sliding sleeve 6, thus affecting the protective effect of the protective sleeve 10. A limiting plate 14 is fixedly connected to the end of the fixing rod 11 away from the protective sleeve 10. The size of the insertion rod 13 matches the size of the slot in the sliding sleeve 6. When the operator pulls the operating plate 12, the operating plate 12 slides on the arc surface of the fixing rod 11. At this time, the limiting plate 14 effectively limits the maximum sliding distance of the operating plate 12 on the arc surface of the fixing rod 11, preventing the operating plate 12 from detaching from the arc surface of the fixing rod 11 due to excessive pulling force. A third spring 15 is fitted onto the arc surface of the fixing rod 11. The two ends of the third spring 15 are fixedly connected to the operating plate 12 and the protective sleeve 10, respectively. When the operator releases the operating plate 12, the rebound force of the third spring 15 causes the operating plate 12 to slide on the arc surface of the fixing rod 11. Simultaneously, the operating plate 12 drives the insertion rod 13 to move until it inserts into the slot of the sliding sleeve 6. At this point, the third spring 15 improves the stability of the insertion rod 13 in limiting the protective sleeve 10, thereby increasing the stability of the protective sleeve 10 in protecting the drill bit 1. A screw 16 is fixedly connected to the side of the protective sleeve 10 near the fixed rod 11. The arc surface of the screw 16 is threadedly connected to a support plate 17. When the operator releases the limitation of the insertion rod 13 on the protective sleeve 10, they continue to pull the operating plate 12 until it moves to the highest point of the fixed rod 11. At this point, the support plate 17 is rotated, causing it to move threadedly on the arc surface of the screw 16 until it moves below the operating plate 12. The support plate 17 then effectively restricts the movement of the operating plate 12, preventing continuous friction between the insertion rod 13 and the sliding sleeve 6 when the operator removes the protective sleeve 10, which could damage either the insertion rod 13 or the sliding sleeve 6.

[0026] Working principle: When the operator needs to use drill bit 1, pressing the latch 8 compresses the second spring 9, inserting drill bit 1 into the spindle 4. At this time, the sliding sleeve 6 slides to the left, causing it to slide on the arc surface of the spindle 4. The sliding sleeve 6 drives the left end cover 2 to move, stretching the first spring 7. The left end cover 2 and the latch 8 are pressed together, causing the latch 8 to compress the second spring 9 until the left end cover 2 passes the latch 8. The rebound force of the second spring 9 then pushes the latch 8 upwards. Releasing the sliding sleeve 6 causes the first spring 7 to move the sliding sleeve 6 to the right, simultaneously moving the left end cover 2... The cover 2 moves until the left end cover 2 abuts against the latch 8. At this point, the latch 8 prevents the left end cover 2 from moving to the right, achieving a quick and stable installation of the drill bit 1. This avoids the need for workers to tighten the nut with a wrench when the drill bit 1 needs to be used, thus reducing their workload. Furthermore, prolonged vibration of the drill bit 1 can cause the nut to loosen, weakening the clamping force and affecting the normal use of the drill bit 1. This improves the practicality of the device. When the drill bit 1 is no longer needed and can be protected, pull... The operating plate 12 slides on the arc surface of the fixed rod 11, stretching the third spring 15. Simultaneously, the operating plate 12 drives the insertion rod 13 to move. The operating plate 12 is continuously pulled until it reaches the highest point of the fixed rod 11. Then, the support plate 17 is rotated, causing it to move along the arc surface of the screw 16 until it moves below the operating plate 12. At this point, the protective sleeve 10 expands and fits onto the drill bit 1. Simultaneously, the contraction force of the rubber material of the protective sleeve 10 causes it to contract onto the arc surface of the sliding sleeve 6. The support plate 17 is then rotated again. The support plate 17 moves along the arc surface of the screw 16 until it disengages from below the operating plate 12. At this time, the rebound force of the third spring 15 causes the operating plate 12 to slide on the arc surface of the fixed rod 11. Simultaneously, the operating plate 12 drives the insertion rod 13 to move until it is inserted into the slot of the sliding sleeve 6. This achieves the effect of reinforcing and limiting the protective sleeve 10, preventing the protective sleeve 10 from disengaging from the arc surface of the sliding sleeve 6 due to the shaking caused by the transfer of the drill bit 1 and the spindle 4, thus affecting the protective effect of the protective sleeve 10.

[0027] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

Claims

1. A chuck for right-angle shank twist drills, comprising a drill bit (1), characterized in that: The drill bit (1) is slidably connected to the main shaft (4) on its arc surface. The main shaft (4) is slidably connected to the sliding sleeve (6) on its arc surface. A left end cap (2) is fixedly connected to one side of the sliding sleeve (6). The left end cap (2) is slidably connected to the arc surface of the drill bit (1). A right end cap (5) is fixedly connected to the side of the sliding sleeve (6) away from the left end cap (2). The right end cap (5) is slidably connected to the arc surface of the main shaft (4). Two retaining rings (3) are fixedly connected to the arc surface of the main shaft (4). A second spring (9) is fixedly connected to the arc surface of the drill bit (1). A retaining tongue (8) is fixedly connected to the end of the second spring (9) away from the drill bit.

2. The right-angle shank twist drill chuck according to claim 1, characterized in that: The arc surface of the main shaft (4) is fitted with a first spring (7), and the two ends of the first spring (7) are respectively fixedly connected to the main shaft (4) by sliding sleeves (6).

3. The right-angle shank twist drill chuck according to claim 1, characterized in that: The arc surface of the sliding sleeve (6) is slidably connected to a protective sleeve (10), and the protective sleeve (10) is made of rubber.

4. The right-angle shank twist drill chuck according to claim 3, characterized in that: A fixing rod (11) is fixedly connected to the surface of the protective sleeve (10), and an operating plate (12) is slidably connected to the arc surface of the fixing rod (11). A plug rod (13) is fixedly connected to one side of the operating plate (12), and a slot is provided on the arc surface of the sliding sleeve (6).

5. The right-angle shank twist drill chuck according to claim 4, characterized in that: The end of the fixing rod (11) away from the protective sleeve (10) is fixedly connected to the limiting plate (14), and the size of the insertion rod (13) is adapted to the size of the slot of the sliding sleeve (6).

6. The right-angle shank twist drill chuck according to claim 4, characterized in that: The arc surface of the fixing rod (11) is fitted with a third spring (15), and the two ends of the third spring (15) are fixedly connected to the operating plate (12) and the protective sleeve (10) respectively.

7. The right-angle shank twist drill chuck according to claim 4, characterized in that: The protective sleeve (10) is fixedly connected to a screw (16) on the side near the fixing rod (11), and the arc surface of the screw (16) is threadedly connected to a support plate (17).

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