Chuck with locking structure and electric drill

Abstract

The technical scheme belongs to the technical field of electric drills, and particularly relates to a chuck with a locking structure and an electric drill, the chuck comprises a chuck main body, the chuck main body is provided with a shaft hole for a main shaft to be inserted, the chuck main body is provided with the locking structure and comprises a plurality of clamping pieces distributed in the circumferential direction of the shaft hole, and the chuck main body is provided with limiting holes for the clamping pieces to be embedded in one-to-one correspondence. The limiting holes are communicated with the side wall of the shaft hole, and the clamping pieces move in the corresponding limiting holes and partially protrude into the shaft hole. The movable pressing sleeve is arranged on the outer side of the chuck main body in a sliding and sleeving mode, the movable pressing sleeve moves between a first position and a second position along the chuck main body, and the movable pressing sleeve is provided with an abutting part close to the chuck main body; the two ends of the elastic piece abut against the movable pressing sleeve and the chuck body respectively, the elastic force pushes the movable pressing sleeve to move towards the second position, the abutting portion synchronously abuts against all the clamping pieces so that parts of the clamping pieces can protrude into the limiting holes to clamp the main shaft, and the locking structure is in a locked state; when the movable pressing sleeve is moved to the first position, the clamping piece can move in the limiting hole, and the locking structure is unlocked.

Description

Technical Field

[0001] The technical solution relates to the technical field of electric drills, and in particular to a chuck and an electric drill with a locking structure. Background Art

[0002] An electric drill is a handheld or desktop electric drilling tool that is driven by electricity. It clamps and drives the drill chuck (screwdriver head) to rotate at high speed through a transmission mechanism to drill holes (tighten bolts) in various materials.

[0003] The chucks in existing electric drills on the market are often detachably connected to the drive spindle. When facing different working conditions, the functions of the electric drill can be expanded or changed by replacing chucks of different specifications and functions, so that a disassembly structure is configured between the electric drill and the chuck. This structure generally adopts threaded screws or locking sleeves to ensure the reliability of clamping and torque transmission capability. However, in application scenarios where different types of chucks need to be frequently replaced, it is necessary to hold the chuck with one hand and operate and install it with the other hand. The operation is cumbersome, resulting in a long time consumption and poor disassembly and assembly efficiency. Utility Model Content

[0004] In order to improve the problem that the disassembly method between the existing electric drill and the chuck is cumbersome and leads to poor disassembly and assembly efficiency, the present technical solution provides a chuck and an electric drill with a locking structure.

[0005] The purpose of this technical solution is achieved in this way:

[0006] A chuck with a locking structure includes a chuck body, wherein the chuck body is provided with an axial hole for a spindle to be inserted, and the chuck body is provided with a locking structure, wherein the locking structure includes:

[0007] A plurality of locking members are distributed circumferentially around the shaft hole. The chuck body is provided with limiting holes for the locking members to be fitted in a one-to-one manner. The limiting holes are all connected to the side wall of the shaft hole. The locking members are movably placed in the corresponding limiting holes, and the locking members can partially protrude into the shaft hole.

[0008] A movable pressing sleeve, wherein the sliding sleeve is arranged on the outer side of the chuck body, the movable pressing sleeve moves along the chuck body between a first position and a second position, and the movable pressing sleeve has a pressing portion near the inner side of the chuck body;

[0009] an elastic member, which is sleeved on the chuck body, and whose two ends respectively abut against the movable pressing sleeve and the chuck body, and the elastic force of the elastic member has a tendency to push the movable pressing sleeve to move toward the second position;

[0010] When the movable pressing sleeve is located at the second position, the pressing portion presses each locking member synchronously, so that the pressed locking member portion protrudes into the limiting hole for clamping the main shaft. At this time, the locking structure is in a locked state;

[0011] When the movable pressing sleeve is moved to the first position, the locking member can move in the limiting hole, and at this time the locking structure is in an unlocked state.

[0012] The chuck is then released from the locking mechanism and the chuck is released from the locking mechanism, and the chuck is then released from the locking mechanism, and the chuck is released from the locking mechanism, and the chuck is then released from the locking mechanism, and the chuck is released from the locking mechanism, and the chuck is released from the locking mechanism, and the chuck is released from the locking mechanism, and the chuck is released from the locking mechanism, and the chuck is released from the locking mechanism, and the chuck is released from the locking mechanism, and the chuck is released from the locking mechanism, and the chuck is released from the locking mechanism, and the chuck is released from the locking mechanism, and the chuck is released from the locking mechanism, and the chuck is released from the locking mechanism, and the chuck is released from the locking mechanism, and the chuck is released from the locking mechanism, and the chuck is released from the locking mechanism, and the chuck is released from the locking mechanism, and the chuck is released from the locking mechanism, and the chuck is released from the locking mechanism, and the chuck is released from the locking mechanism, and the chuck is released from the locking mechanism, and the chuck

[0013] Preferably, the movable pressing sleeve is provided with a pressing ring, the movable pressing sleeve is provided with a fixing groove, the rear end of the pressing ring is clamped with the movable pressing sleeve through the fixing groove, and the front end of the pressing ring is formed with the pressing portion.

[0014] Through the above technical solution, the pressure ring is fixedly connected to the movable pressure sleeve by inserting the inner end into the fixed groove, and the pressing part is arranged on the inner side of the pressure ring. When the pressing part is worn after long-term use, the pressure ring can be replaced, thereby reducing the use cost.

[0015] Preferably, the pressure ring has an avoidance groove corresponding to the locking member, for avoiding the locking member.

[0016] Through the above technical solution, when the locking part is in the third position, the avoidance groove provides a specific groove depth to provide a space for the locking part to protrude and accommodate, so that the locking part can be confined in the avoidance groove and will not excessively disengage or even detach from the large mouth end of the limiting hole, thereby ensuring the accurate operation of the device.

[0017] Preferably, the locking member has an arc surface, and the pressing portion correspondingly has a guide arc surface that abuts against the arc surface.

[0018] Through the technical scheme, in the process that the abutting portion abuts against the clamping piece near the clamping piece, the guiding arc surface and the circular arc surface are in progressive arc surface contact, the lowest point of the guiding arc surface is gently guided to abut against the corresponding position of the circular arc surface, the contact stress is uniformly distributed, the clamping piece is gradually extruded to move, the fluency of the abutting and fitting is improved, rigid impact is reduced, wear is reduced, and service life is prolonged.

[0019] Preferably, the inner wall of the limiting hole is an inclined inner wall, and the inclination direction of the inclined inner wall is such that the limiting hole is arranged in a tapered manner towards the shaft hole direction, and the passage cross section of the limiting hole at the necked end is smaller than the cross section size of the clamping piece.

[0020] Through the technical scheme, the inner wall of the limiting hole is arranged in an inclined manner, so that the one end port of the limiting hole is larger than the other end port, the clamping piece can be smoothly embedded into the flared end of the limiting hole, the clamping piece cannot be separated from the necked end of the limiting hole, and at the same time, it is ensured that when the clamping piece abuts against the inner wall of the necked end, part of the structure can protrude into the shaft hole, so as to ensure the abutting and fitting relationship between the clamping piece and the main shaft.

[0021] Preferably, the clamping piece moves between the third position and the fourth position along the limiting hole, when the main shaft pushes the clamping piece to the third position, the clamping piece protrudes towards the avoiding groove direction through the flared end of the limiting hole, and when the abutting portion pushes the clamping piece to the fourth position, the clamping piece protrudes towards the shaft hole direction through the necked end of the limiting hole.

[0022] Through the technical scheme, the main shaft pushes the clamping piece to the third position, at this time, the clamping piece protrudes from the flared end of the limiting hole, and it is ensured that the protruding part can be extruded by the abutting portion in the subsequent process, the abutting portion pushes the clamping piece to the fourth position, so that the extruded clamping piece protrudes from the necked end of the limiting hole, the effect of pressing and positioning the main shaft is realized, and the smooth switching of the two working conditions is ensured.

[0023] Preferably, the chuck body is sleeved with a clamping spring one, the clamping spring one protrudes from the chuck body, and is used for abutting against the movable pressing sleeve to limit separation.

[0024] Through the technical scheme, after the movable pressing sleeve is assembled to the chuck body, the clamping spring one is clamped in the clamping groove of the chuck body, at this time, the clamping spring one is located outside the movable pressing sleeve installation direction, and based on the fixed position of the clamping spring one and the abutment against the movable pressing sleeve, the movable pressing sleeve is limited from being separated from the chuck body, and fixed installation is realized.

[0025] Preferably, the chuck body is further provided with a replacement hole, and the chuck body is provided with a quick replacement structure, the quick replacement structure comprises:

[0026] There are at least two movable parts distributed circumferentially around the changing hole, and the chuck body is provided with locking holes for the movable parts to be engaged one by one, and the locking holes are all connected to the side wall of the changing hole, and the movable parts are movably arranged along the corresponding locking holes;

[0027] A sleeve is slidably sleeved on the outside of the chuck body, the sleeve is provided with a pressing protrusion on the inner side close to the chuck body, and the chuck body is provided with a boss surface for the pressing protrusion to abut and limit;

[0028] A reset spring, the chuck body is provided with a second retaining spring, the two ends of the reset spring respectively rest on the second retaining spring and the movable part, the sleeve moves along the chuck body between the fifth position and the sixth position, and when the sleeve is in the fifth position, the quick-change structure is in an unlocked state; the elastic force of the reset spring has a tendency to push the movable pressing sleeve to move to the sixth position, the pressing protrusions synchronously press each movable part to protrude into the changing hole, and the quick-change structure is in a locked state.

[0029] Through the above technical solution, the sleeve is pushed and maintained in the sixth position under the elastic force of the return spring. The sleeve is manually pushed to the fifth position, and an appropriate tool (such as a screwdriver head, etc.) is inserted into the changing hole. The sleeve is released, and the return spring pushes the sleeve back to the sixth position. The sleeve squeezes all the movable parts at the same time by the pressing protrusion, so that each movable part clamps the handle of the tool together, thereby realizing the rapid replacement and installation of different types of tools and convenient operation.

[0030] An electric drill comprises an electric drill body and a spindle, wherein the electric drill body is detachably connected to the chuck body, the spindle is rotatably arranged in the electric drill body, and further comprises a chuck with a locking structure as described in any one of the above items, the electric drill body is provided with a mounting seat, the spindle is provided with a plurality of locking grooves corresponding to the locking members along the circumference of the outer wall, the locking members abutting against the locking grooves one by one to realize torque transmission between the spindle and the locking member.

[0031] Through the above technical solution, each locking member can be embedded in each locking groove of the main shaft when it protrudes from the shaft hole, further improving the clamping stability of the main shaft, and the torque is further directly transmitted through the groove wall, thereby improving dynamic stability.

[0032] Preferably, the chuck body is provided with a first drive shaft and a second drive shaft, the first drive shaft and the second drive shaft are engaged with each other through a bevel gear for transmission, the first drive shaft and the second drive shaft are rotatably arranged in the chuck body, and the rotation axes of the first drive shaft and the second drive shaft are perpendicular to each other, the first drive shaft is provided with the shaft hole, and the second drive shaft is provided with a driven shaft for mating with the shaft hole on the other chuck body;

[0033] The mounting seat is provided with a plurality of positioning slots along the circumferential direction of the main shaft rotation axis, and the movable pressing sleeve is provided with a plurality of positioning protrusions for being fitted into the plurality of positioning slots in a one-to-one correspondence.

[0034] Through the above technical solution, when the chuck body is installed, the shaft hole position is aligned with the main shaft and then close to the mounting seat. The positioning protrusions are the same in number, position and size as the positioning slots. Several positioning protrusions can be embedded in the corresponding positioning slots at the same time, so that when the main shaft drives the driving shaft 1 to rotate, the movable pressure sleeve and the chuck body do not rotate; the rotation of the driving shaft 1 drives the driving shaft 2 to rotate through the bevel gear, and the bevel gear realizes 90° power steering. The driven shaft of the driving shaft 2 has the same structure as the main shaft. The driven shaft can be installed with other chuck bodies, and the driven shaft drives the other chuck bodies to operate, thereby changing the power transmission path, changing the output angle, and improving the adaptability and operational safety of the electric drill in complex spaces.

[0035] Compared with the existing technology, this technical solution has the following outstanding and beneficial technical effects:

[0036] 1. This technical solution unlocks the chuck body by pulling out the movable pressing sleeve when the chuck body is installed on the spindle. The spindle is inserted into the shaft hole and pushes the locking parts to avoid radially. After release, the movable pressing sleeve automatically resets, and all the locking parts are synchronously driven by the pressing part to clamp the spindle radially, forming a rigid transmission. When disassembling, only the pressing sleeve needs to be pulled out to release the lock between the spindle and the chuck body; simplifying the disassembly and assembly process, making the disassembly of the chuck body more convenient, and improving the efficiency of chuck replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 Schematic diagram of the overall structure of this embodiment;

[0038] Figure 2 Schematic diagram of the overall structure of the electric drill in the embodiment;

[0039] Figure 3 This is a schematic diagram of the overall structure of a chuck with a locking structure in an embodiment in which a screwdriver bit is selected for the chuck;

[0040] Figure 4 A partial exploded schematic diagram of a chuck with a locking structure according to an embodiment;

[0041] Figure 5 The embodiment of the clamp with a locking structure Figure 4 Schematic diagram from another perspective;

[0042] Figure 6 The embodiment of the clamp with a locking structure Figure 3 partial cross-sectional schematic diagram;

[0043] Figure 7 This is a schematic diagram of the overall structure of a drill chuck selected from the chuck with a locking structure in an embodiment;

[0044] Figure 8 This is a schematic diagram of the overall structure of a chuck with a locking structure in an embodiment in which a right-angle adapter is selected for the chuck;

[0045] Figure 9 The embodiment of the clamp with a locking structure Figure 8 partial cross-sectional schematic diagram;

[0046] Figure 10 Schematic diagram of the combined structure of the screwdriver bit and the right-angle adapter in this embodiment.

[0047] 1. Clamp body; 2. Shaft hole; 3. Locking structure; 31. Fixing part; 32. Movable pressure sleeve; 33. Elastic part; 4. Limiting hole; 5. Pressing part; 61. Retaining spring 1; 62. Retaining spring 2; 7. Pressing ring; 8. Fixing groove; 9. Guide arc surface; 10. Circular arc surface; 11. Avoiding groove; 12. Quick-changing structure; 121. Movable part; 122. Sleeve; 123. Return spring; 13. Changing hole; 14. Fixing hole; 15. Pressing protrusion; 16. Boss surface; 17. Electric drill body; 18. Spindle; 19. Mounting seat; 201. Positioning slot; 202. Positioning protrusion; 21. Fixing slot; 221. Driving shaft 1; 222. Driving shaft 2; 23. Driven shaft; 100. Bevel gear. DETAILED DESCRIPTION

[0048] The specific implementation of the technical solution is further described in detail below with reference to the accompanying drawings.

[0049] Example:

[0050] See also Figure 3 、 Figure 4 、 Figure 5 and Figure 6 , a chuck with a locking structure, including a chuck body 1, which is preferably a screwdriver head, and its front end can be installed with different types of screwdriver heads. The chuck body 1 is provided with an axial hole 2, which is used to be plugged into and matched with the main shaft 18; the chuck body 1 is provided with a locking structure 3, which includes a fixing part 31, a movable pressing sleeve 32 and an elastic part 33, the movable pressing sleeve 32 is sleeved on the outer side of the chuck body 1, and can be slidably set on the chuck body 1 through the sleeve fit, and the chuck body 1 is provided with a retaining spring 61. In the embodiment shown, the chuck body 1 is close to the through end of the axial hole 2 and a limiting convex ring protrudes outward along the circumferential direction. The retaining spring 61 is tightened on the chuck body 1, and one side of the retaining spring 61 abuts against the limiting convex ring, and the other side can abut against the movable pressing sleeve 32 to limit the movable pressing sleeve 32 from sliding off from the chuck body 1.

[0051] The movable pressing sleeve 32 is provided with a fixing groove 8 on the inner side near the chuck body 1. The movable pressing sleeve 32 is also provided with a pressing ring 7, which is preferably made of metal. The rear end of the pressing ring 7 is clamped in the adapted fixing groove 8 and fixed. The front end of the pressing ring 7 has a pressing portion 5, which is protruding toward the direction of the chuck body 1. The pressing portion 5 has a guiding arc surface 9, which is located on the side of the pressing portion 5 facing the chuck body 1, so that the pressing portion 5 has a lowest point. The pressing ring 7 is also formed with an avoidance groove 11, which leaves a gap between the pressing ring 7 and the chuck body 1. The avoidance groove 11 is located on the outside of the pressing ring 7 along the sliding direction of the movable pressing sleeve 32. Alternatively, the pressing ring 7 can also be connected to the movable pressing sleeve 32 as a whole, or the rear end of the pressing ring 7 is embedded in the inner side of the movable pressing sleeve 32, and the rear end of the pressing ring 7 is stretched and clamped into the fixing groove 8 by stamping, so that the pressing ring 7 is shaped into a shape suitable for the fixing groove 8.

[0052] The elastic member 33 is preferably a spring, one end of which abuts against the chuck body 1 and the other end abuts against the movable pressing sleeve 32. The elastic force pushes the movable pressing sleeve 32 to move away from the chuck body 1. Therefore, under normal circumstances, the elastic member 33 pushes the movable pressing sleeve 32 to abut against the retaining spring 61 to maintain a stable state.

[0053] The locking members 31 are preferably ball bearings, of which there are several. Several locking members 31 are located on the chuck body 1 and are arranged circumferentially at intervals along the sliding direction of the movable sleeve 32. Each locking member 31 has a circular arc surface 10. The chuck body 1 is provided with a limiting hole 4 for the locking members 31 to be fitted one by one. The inner wall of each limiting hole 4 is an inclined inner wall. The inclination direction of the inclined inner wall makes the channel of each limiting hole 4 gradually shrink toward the position of the axial hole 2, so that the end port of the limiting hole 4 passing through to the axial hole 2 is the shrinking end, and the port passing through to the outside is the flaring end. The maximum diameter size of the locking member 31 needs to be smaller than the flaring end of the limiting hole 4 and larger than the shrinking end of the limiting hole 4, to ensure that the locking member 31 can be embedded in the limiting hole 4 through the flaring end, while preventing it from escaping from the limiting hole 4 through the shrinking end and falling into the axial hole 2.

[0054] The movable pressing sleeve 32 moves back and forth between the first position and the second position along the chuck body 1, and the locking member 31 moves between the third position and the fourth position along the limiting hole 4. When the movable pressing sleeve 32 is pushed to the first position, the locking structure 3 is in the unlocked state, the main shaft 18 is inserted into the shaft hole 2 adapted thereto, and the main shaft pushes all the locking members 31 to move synchronously to the third position. At this time, the locking members 31 all protrude from the flared ends of the corresponding limiting holes 4; then the movable pressing sleeve 32 is released, and the elastic force of the elastic member 33 pushes the movable pressing sleeve 32 to move to the second position, guiding The arc surface 9 contacts and guides the circular arc surface 10, and the pressing portion 5 synchronously presses each locking member 31 to move. All the locking members 31 move to the fourth position, and the locking members 31 all protrude into the limiting hole 4. The protruding parts resist the outer wall of the main shaft 18, and the multi-point resistance forms a clamping effect on the main shaft 18. At this time, the locking structure 3 is in a locked state, and the main shaft 18 is limited to the shaft hole 2 to limit disengagement. The driving device drives the main shaft 18 to rotate, and the main shaft 18 drives the chuck body 1 to rotate synchronously through the torque transmission of each locking member 31, so that the chuck drives the screwdriver to work.

[0055] See also Figure 6 The chuck body 1 is provided with a quick-change structure 12, which includes a movable part 121, a sleeve 122 and a reset spring 123. A changing hole 13 is opened at the front end of the chuck body 1, and the sleeve 122 is slidably sleeved on the outside of the corresponding changing hole 13 of the chuck body 1, and the sliding direction of the sleeve 122 is set axially along the sleeve position.

[0056] The chuck body 1 is provided with a second retaining spring 62, and the chuck body 1 is provided with a ring groove for the second retaining spring 62 to be embedded and fixed. One end of the return spring 123 rests on the second retaining spring 62 and the other end rests on the sleeve 122. Based on the fixed position of the second retaining spring 62, its elastic force pushes the sleeve 122 to slide inward away from the second retaining spring 62. A pressing protrusion 15 protrudes from the inner side of the sleeve 122 close to the chuck body 1, and the chuck body 1 has a boss surface 16, whose end face faces the sliding direction of the sleeve 122. Under normal circumstances, the pressing protrusion 15 rests on the boss surface 16 to limit further inward movement of the sleeve 122.

[0057] The chuck body 1 is provided with a plurality of fixing holes 14, each of which passes through the changing hole 13 to the outside. The plurality of fixing holes 14 are arranged circumferentially along the sliding direction of the sleeve 122 on the chuck body 1. The inner walls of the fixing holes 14 are all inclined inner walls. The inclined direction of the inner walls of the holes makes the fixing holes 14 gradually shrink toward the changing hole 13. The outer hole opening of the fixing hole 14 passing through to the outside is the large hole end, and the inner hole opening passing through to the changing hole 13 is the small hole end; the movable part 121 is preferably a ball, and the number of the movable parts 121 is the same as that of the movable part 121. The fixing holes 14 are the same, and several movable parts 121 are embedded in the fixing holes 14 one by one. The maximum diameter of the movable part 121 is smaller than the large hole end of the fixing hole 14 and larger than the small hole end of the fixing hole 14, ensuring that the movable part 121 can be embedded in the fixing hole 14 through the large hole end, while preventing it from falling into the changing hole 13 through the small hole end; the principle of the quick-changing structure 12 is similar to that of the locking structure 3, and the specific implementation method is similar, which will not be repeated here. The handle of the bit is adapted to the changing hole 13 and can be inserted into the changing hole 13.

[0058] See also Figure 7 and Figure 8 The chuck is preferably a drill chuck with a drill bit at its end. The specific implementation is similar to the solution of using a screwdriver head for the chuck, and will not be described in detail here.

[0059] The specific working process of this program is as follows:

[0060] When the chuck body 1 is assembled with the chuck body 1 and the chuck body 1 is assembled, the chuck body 1 is assembled with the chuck body 1 and the chuck body 1 is assembled with the chuck body 1. When the chuck body 1 is assembled with the chuck body 1 and the chuck body 1 is assembled with the chuck body 1, the chuck body 1 is assembled with the chuck body 1 and the chuck body 1 is assembled with the chuck body 1. When the chuck body 1 is assembled with the chuck body 1, the chuck body 1 is assembled with the chuck body 1 and the chuck body 1 is assembled with the chuck body 1. When the chuck needs to be disassembled, since the chuck body 1 and the main shaft 18 are still fixed, it is only necessary to pull out the movable pressure sleeve 32 with one hand, and the pressing part 5 is then moved away so that the locking part 31 loses the external force constraint, and the main shaft 18 is unlocked, and the shaft hole 2 can be pulled out, thereby achieving reliable and fast locking and unlocking between the main shaft 18 and the chuck body 1, simplifying the chuck disassembly and assembly operation steps and improving the chuck replacement efficiency.

[0061] See also Figure 1 and Figure 2, an electric drill, including an electric drill body 17 and a main shaft 18. The electric drill body 17 is a prior art and will not be described in detail here. The electric drill body 17 is often provided with a drive motor, a battery and a switch for controlling the start or shut down of the drive motor installed therein. A mounting seat 19 is provided at the front end of the electric drill body 17. One end of the main shaft 18 extends outward through the mounting seat 19 and the other end is connected to the output end of the drive motor. The drive motor can drive the main shaft 18 to rotate around its own axis. The main shaft 18 is provided with a plurality of fixing grooves 21 along the circumference of the outer wall. The number of the fixing grooves 21 is equal to the number of the fixing parts 31, and the distribution positions are set in a one-to-one correspondence with the positions of the fixing parts 31.

[0062] See also Figure 2 、 Figure 8 、 Figure 9 When the chuck is preferably a right-angle adapter, the spindle 18 is provided with a plurality of positioning slots 201 along the outer peripheral wall of the rotation axis, and the movable pressing sleeve 32 protrudes with a plurality of positioning protrusions 202 for one-to-one matching with the plurality of positioning slots 201, so that the movable pressing sleeve 32 is fixed to the electric drill body 17, limiting the rotation of the movable pressing sleeve 32; a driving shaft 1 221 and a driving shaft 2 222 are provided in the chuck body 1, and the driving shaft 1 221 and the driving shaft 2 222 are meshed with each other through the bevel gear 100 for transmission, and the driving shaft 1 221 and the driving shaft 2 222 are rotatably arranged in the chuck body 1, and the rotation axes of the driving shaft 1 221 and the driving shaft 2 222 are perpendicular to each other, and the driving shaft 1 221 is provided with the shaft hole 2, and the driving shaft 2 222 has a driven shaft 23, whose structure is the same as that of the spindle 18, and the driven shaft 23 is inserted into the shaft hole 2 of the other chucks, see Figure 10 The driving shaft 1 221 rotates through the bevel gear 100 to drive the driving shaft 2 222 to rotate. The original transmission path of the bevel gear 100 is turned 90 degrees. The driven shaft 23 is connected to a second chuck (such as a screwdriver head), which can change the power transmission path and the output angle. The driven shaft 23 drives the second chuck to rotate. Depending on the situation, by changing the installation direction of the right-angle adapter, the working direction of other chucks connected to it can be changed accordingly to expand the scope of application.

[0063] The above shows and describes the basic principles and main features of the present technical solution and the advantages of the present technical solution. Those skilled in the art should understand that the present technical solution is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present technical solution. Various changes and improvements may be made to the present technical solution without departing from the spirit and scope of the present technical solution. Such changes and improvements fall within the scope of the present technical solution for which protection is sought. The scope of protection claimed by the present technical solution is defined by the appended claims and their equivalents.

Claims

1. A chuck with a locking structure, comprising a chuck body (1), wherein the chuck body (1) is provided with an axial hole (2) for a spindle to be inserted, and wherein: The chuck body (1) is provided with a locking structure (3), and the locking structure (3) comprises: A plurality of locking members (31) are circumferentially distributed around the shaft hole (2); the chuck body (1) is provided with limiting holes (4) for the locking members (31) to be fitted one-to-one; the limiting holes (4) are all connected to the side walls of the shaft hole (2); the locking members (31) are movably placed in the corresponding limiting holes (4), and the locking members (31) can partially protrude from the shaft hole (2); A movable pressing sleeve (32), the sliding sleeve of which is arranged on the outside of the chuck body (1), the movable pressing sleeve (32) moves along the chuck body (1) between a first position and a second position, and the movable pressing sleeve (32) has a pressing portion (5) near the inner side of the chuck body (1); an elastic member (33) which is sleeved on the chuck body (1), with two ends respectively abutting against the movable pressing sleeve (32) and the chuck body (1), and the elastic force of the elastic member (33) has a tendency to push the movable pressing sleeve (32) to move toward the second position; When the movable pressing sleeve (32) is located at the second position, the pressing portion (5) presses each locking member (31) synchronously, so that the pressed locking member (31) partially protrudes into the limiting hole (4) for clamping the main shaft, and at this time, the locking structure (3) is in a locked state; When the movable pressing sleeve (32) is moved to the first position, the locking member (31) can move in the limiting hole (4), and at this time the locking structure (3) is in an unlocked state.

2. The chuck with a locking structure according to claim 1, characterized in that: The movable pressing sleeve (32) is provided with a pressing ring (7), and the movable pressing sleeve (32) is provided with a fixing groove (8). The rear end of the pressing ring (7) is snap-connected with the movable pressing sleeve (32) through the fixing groove (8), and the front end of the pressing ring (7) is formed with the pressing portion (5).

3. The chuck with a locking structure according to claim 2, characterized in that: The pressure ring (7) has an avoidance groove (11) corresponding to the locking member (31) and is used to avoid the locking member (31).

4. The chuck with a locking structure according to claim 1, characterized in that: The locking member (31) has a circular arc surface (10), and the pressing portion (5) correspondingly has a guide arc surface (9) that abuts against the circular arc surface (10).

5. The chuck with a locking structure according to claim 1, characterized in that: The inner wall of the limiting hole (4) is an inclined inner wall, and the inclination direction of the inclined inner wall causes the limiting hole (4) to be gradually contracted toward the axial hole (2). The channel cross-section of the limiting hole (4) at the contracted end is smaller than the cross-sectional size of the locking member (31).

6. The chuck with a locking structure according to claim 3, characterized in that: The locking member (31) moves between a third position and a fourth position along the limiting hole (4). When the main shaft pushes the locking member (31) to the third position, the locking member (31) protrudes toward the avoidance groove (11) through the expanded end of the limiting hole (4). When the pressing portion (5) pushes the locking member (31) to the fourth position, the locking member (31) protrudes toward the shaft hole (2) through the contracted end of the limiting hole (4).

7. The chuck with a locking structure according to claim 5, characterized in that: The chuck body (1) is sleeved with a retaining spring (61), which protrudes from the chuck body (1) and is used to abut against the movable pressing sleeve (32) to limit separation.

8. The chuck with a locking structure according to claim 1, characterized in that: The chuck body (1) is further provided with a replacement hole (13), and the chuck body (1) is provided with a quick-change structure (12), and the quick-change structure (12) comprises: There are at least two movable parts (121) distributed circumferentially around the changing hole (13); the chuck body (1) is provided with fixing holes (14) for the movable parts (121) to be fitted one-to-one; the fixing holes (14) are all connected to the side walls of the changing hole (13); and the movable parts (121) are movably arranged along the corresponding fixing holes (14); A sleeve (122) is slidably sleeved on the outside of the chuck body (1), a pressing protrusion (15) is protruded from the inner side of the sleeve (122) close to the chuck body (1), and the chuck body (1) is provided with a boss surface (16) for the pressing protrusion (15) to abut and limit; A reset spring (123), the chuck body (1) is provided with a second retaining spring (62), the two ends of the reset spring (123) respectively abut against the second retaining spring (62) and the movable part (121), the sleeve (122) moves along the chuck body (1) between the fifth position and the sixth position, when the sleeve (122) is in the fifth position, the quick-change structure (12) is in an unlocked state; the elastic force of the reset spring (123) has a tendency to push the movable pressing sleeve (32) to move to the sixth position, the pressing protrusion (15) synchronously presses each movable part (121) to move into the changing hole (13), and the quick-change structure (12) is in a locked state.

9. An electric drill comprising an electric drill body (17) and a spindle (18), wherein the electric drill body (17) is detachably connected to the chuck body (1), and the spindle (18) is rotatably arranged in the electric drill body (17), characterized in that: It also includes a chuck with a locking structure as described in any one of claims 1 to 8, the electric drill body (17) is provided with a mounting seat (19), the main shaft (18) passes through the mounting seat (19), and the main shaft (18) is provided with a plurality of locking grooves (21) corresponding to the locking member (31) along the circumference of the outer wall, and the locking members (31) are in contact with the corresponding locking grooves (21) one by one to realize torque transmission between the main shaft (18) and the locking member (31).

10. The electric drill according to claim 9, characterized in that: The chuck body (1) is provided with a driving shaft 1 (221) and a driving shaft 2 (222), wherein the driving shaft 1 (221) and the driving shaft 2 (222) are meshed with each other through bevel gears for transmission, the driving shaft 1 (221) and the driving shaft 2 (222) are rotatably arranged in the chuck body (1), and the rotation axes of the driving shaft 1 (221) and the driving shaft 2 (222) are perpendicular to each other, the driving shaft 1 (221) is provided with the shaft hole (2), and the driving shaft 2 (222) has a driven shaft (23) for mating with the shaft hole on the other chuck body; The mounting seat (19) is provided with a plurality of positioning slots (201) along the circumference of the rotation axis of the main shaft (18), and the movable pressing sleeve (32) is provided with a plurality of positioning protrusions (202) for correspondingly fitting with the plurality of positioning slots (201).

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