Electric wrench facilitating quick replacement of sleeve head

Abstract

The utility model relates to the technical field of electric wrenches, in particular to an electric wrench convenient for quickly replacing a sleeve head, which comprises a mechanical arm, a servo motor arranged at the working end of the mechanical arm, a mounting part arranged at the output end of the servo motor and the sleeve head mounted on the mounting part, clamping grooves are formed in the outer circumferential surface of the sleeve head at equal intervals around the central axis of the sleeve head; the mounting part comprises a rotating shaft fixed to the output end of the servo motor, a plurality of first mounting frames are arranged on the outer circumferential face of the other end of the rotating shaft around the center axis of the rotating shaft at equal intervals, clamping rods used for fixing the sleeve heads are hinged to the first mounting frames, and linkage rods are hinged to one ends of the clamping rods. The rotating shaft is sleeved with a sliding sleeve capable of moving in the direction of the center axis of the rotating shaft, and a plurality of second mounting frames are fixed to the outer circumferential face of the sliding sleeve at equal intervals. The sleeve head is fixed to the end of the rotating shaft through the clamping rod. The problem that the sleeve head is easy to fall off is solved.

Description

Technical Field

[0001] This utility model application relates to the field of electric wrench technology, specifically to an electric wrench that facilitates quick change of the socket. Background Technology

[0002] An electric wrench typically consists of a motor, a battery, and replaceable sockets. A mounting sleeve is located at the motor's output end, and the motor's working end is positioned at the center of the sleeve. When the electric wrench is in operation, the socket is inserted into the mounting sleeve, allowing it to engage with the motor's working end inside the sleeve. As the motor rotates the working end, it in turn rotates the socket, thus enabling the installation and removal of nuts or bolts.

[0003] Chinese Patent Publication No. CN220882154U discloses an electric wrench for easy socket replacement. It includes: a motor housed inside a housing; a drive shaft connected to a reducer for transmitting output torque; a wrench head mounted on the drive shaft; and a mounting assembly mounted on the wrench head. The mounting assembly includes: ear plates located on the front and rear sides and the top and bottom sides of the left end face of the wrench head; a connecting rod located between two ear plates on the same side; a connecting plate rotatably mounted on the connecting rod; an inner clamping block located on the connecting plate and inside the wrench head, the inner clamping block being inclined; an outer clamping block located on the side of the connecting plate away from the inner clamping block, and the outer clamping block being located outside the wrench head; and an elastic element located between the connecting plate and the ear plates, the elastic element providing a restoring elastic force to the inner clamping block.

[0004] Existing electric wrenches require changing the socket size according to the nut or bolt size during operation. Currently, the socket and motor are typically mounted via a direct insertion method, which causes the socket to easily detach from the motor's working end during operation, thus affecting work efficiency. Therefore, this paper proposes an electric wrench that allows for quick and easy socket changes. Utility Model Content

[0005] To address the aforementioned problems, an electric wrench that facilitates quick socket replacement is provided. It utilizes an internally threaded rotating sleeve that moves along the central axis of a rotating shaft, causing the internally threaded rotating sleeve to press against a sliding sleeve that moves synchronously along the central axis of the rotating shaft. The sliding sleeve, via a second mounting bracket, drives a linkage rod, which simultaneously rotates around its hinge point with the second mounting bracket, gradually increasing the angle between the central axis of the linkage rod and the central axis of the rotating shaft. At this point, the linkage rod drives a clamping rod to rotate around its hinge point with the first mounting bracket, with the end of the clamping rod away from the linkage rod engaging in a slot. This effectively secures the socket to the end of the rotating shaft, solving the problem of the socket easily detaching.

[0006] To address the existing technical problems, this application provides an electric wrench that facilitates quick change of socket heads, including a robotic arm, a servo motor disposed at the working end of the robotic arm, a mounting part disposed at the output end of the servo motor, and a socket head mounted on the mounting part. The socket head has slots equidistantly distributed around its central axis on its outer circumferential surface.

[0007] The mounting part includes a rotating shaft fixed to the output end of the servo motor. Several first mounting brackets are equidistantly arranged on the outer circumference of the other end of the rotating shaft around its central axis. Each first mounting bracket has a clamping rod hinged to it for fixing the sleeve. One end of the clamping rod is hinged to a linkage rod.

[0008] The rotating shaft is fitted with a sliding sleeve that can move along its central axis. Several second mounting brackets are fixed at equal intervals on the outer circumference of the sliding sleeve. The end of the linkage rod away from the clamping rod is hinged to the second mounting bracket.

[0009] An internally threaded rotating sleeve that can move along its central axis is also rotatably mounted on the outside of the rotating shaft.

[0010] As one technical solution of this application, a spring seat is fixed on the side of the outer circumference of the rotating shaft near the first mounting bracket, and a reset spring for driving the sliding sleeve to reset is provided on the side of the spring seat. The reset spring is sleeved on the first mounting bracket.

[0011] As one technical solution of this application, a limiting block for limiting the sliding sleeve is fixed on the outer circumferential surface of the rotating shaft;

[0012] The inner circumferential surface of the sliding sleeve is provided with a limiting groove that slides with the limiting block.

[0013] As one technical solution of this application, the rotating shaft is provided with an external thread that mates with the internal thread rotating sleeve thread.

[0014] As one technical solution of this application, a polygonal column is provided at one end of the rotating shaft;

[0015] The mounting head has a mounting groove adapted to the polygonal column, and the mounting groove is fitted onto the polygonal column.

[0016] As one technical solution of this application, a reinforcing sleeve is fixed on one side of the servo motor, the reinforcing sleeve is sleeved on the rotating shaft, and a bearing sleeved on the rotating shaft is fixed inside the end of the reinforcing sleeve away from the servo motor.

[0017] The advantages of this utility model application compared to the prior art are:

[0018] This application utilizes an internally threaded rotating sleeve that moves along the central axis of a rotating shaft, causing the internally threaded rotating sleeve to press against a sliding sleeve that moves synchronously along the central axis of the rotating shaft. This allows the sliding sleeve to drive a linkage rod via a second mounting bracket, while the linkage rod rotates around its hinge point with the second mounting bracket, gradually increasing the angle between the central axis of the linkage rod and the central axis of the rotating shaft. At this point, the linkage rod drives a clamping rod to rotate around its hinge point with the first mounting bracket, and the end of the clamping rod away from the linkage rod is engaged in a slot. This effectively secures the sleeve head to the end of the rotating shaft, solving the problem of the sleeve head easily detaching. Attached Figure Description

[0019] Figure 1 This is a 3D diagram of an electric wrench that allows for quick and easy change of sockets.

[0020] Figure 2 This is an exploded view of an electric wrench that allows for quick and easy change of sockets.

[0021] Figure 3 This is a three-dimensional view of the mounting part of an electric wrench that facilitates quick change of sockets.

[0022] Figure 4 This is a sectional view of the mounting part of an electric wrench that facilitates quick change of sockets.

[0023] Figure 5 This is a 3D diagram of a sliding sleeve in an electric wrench that facilitates quick sleeve replacement.

[0024] Figure 6 This is a 3D diagram of the socket in an electric wrench that allows for quick and easy socket changes.

[0025] Figure 7 yes Figure 4 Enlarged view of point A in the image.

[0026] Figure 8 yes Figure 4 Enlarged view of point B in the image.

[0027] The following are the labels in the diagram: 1. Robotic arm; 2. Servo motor; 3. Reinforcing sleeve; 31. Bearing; 4. Mounting part; 41. Rotating shaft; 411. First mounting bracket; 412. External thread; 413. Limiting block; 42. Internal thread rotating sleeve; 43. Clamping rod; 431. Linkage rod; 44. Spring seat; 45. Sliding sleeve; 451. Second mounting bracket; 452. Limiting groove; 46. Return spring; 47. Polygonal cylinder; 5. Sleeve head; 51. Slot; 52. Mounting groove. Detailed Implementation

[0028] To further understand the features, technical means, and specific objectives and functions achieved by this utility model application, the following detailed description of this utility model application is provided in conjunction with the accompanying drawings and specific embodiments.

[0029] See Figures 1-8 As shown, an electric wrench that facilitates quick change of socket head includes a robotic arm 1, a servo motor 2 disposed at the working end of the robotic arm 1, a mounting part 4 disposed at the output end of the servo motor 2, and a socket head 5 mounted on the mounting part 4. The outer circumferential surface of the socket head 5 is provided with slots 51 equidistantly distributed around its central axis.

[0030] The mounting part 4 includes a rotating shaft 41 fixed to the output end of the servo motor 2. Several first mounting brackets 411 are equidistantly arranged on the outer circumferential surface of the other end of the rotating shaft 41 around its central axis. Each first mounting bracket 411 has a clamping rod 43 hinged to it for fixing the sleeve head 5. One end of the clamping rod 43 is hinged to a linkage rod 431.

[0031] The outer side of the rotating shaft 41 is fitted with a sliding sleeve 45 that can move along its central axis. Several second mounting brackets 451 are fixed at equal intervals on the outer circumference of the sliding sleeve 45. The end of the linkage rod 431 away from the clamping rod 43 is hinged to the second mounting bracket 451.

[0032] The rotating shaft 41 is also rotatably mounted with an internally threaded rotating sleeve 42 that can move along its central axis.

[0033] When fixing the sleeve 5, the internally threaded rotating sleeve 42 moves along the central axis of the rotating shaft 41, causing the internally threaded rotating sleeve 42 to press against the sliding sleeve 45, which moves synchronously along the central axis of the rotating shaft 41. This allows the sliding sleeve 45 to drive the linkage rod 431 via the second mounting bracket 451. Simultaneously, the linkage rod 431 rotates around its hinge with the second mounting bracket 451, causing the angle between the central axis of the linkage rod 431 and the central axis of the rotating shaft 41 to gradually increase. At this time, the linkage rod 431 drives the clamping rod 43 to rotate around its hinge with the first mounting bracket 411, and the end of the clamping rod 43 away from the linkage rod 431 is engaged in the slot 51. This secures the sleeve 5 to the end of the rotating shaft 41, solving the problem of the sleeve 5 easily falling off.

[0034] See Figure 3 , Figure 4 , Figure 5 , Figure 7 and Figure 8 As shown, a spring seat 44 is fixed on the side of the outer circumference of the rotating shaft 41 near the first mounting bracket 411. A reset spring 46 for driving the sliding sleeve 45 to reset is provided on the side of the spring seat 44. The reset spring 46 is sleeved on the first mounting bracket 411.

[0035] When replacing the sleeve 5, the pressure acting on the sliding sleeve 45 gradually decreases by rotating the internal threaded rotating sleeve 42 in the reverse direction. Simultaneously, the elastic potential energy of the return spring 46 pushes the sliding sleeve 45 to move in the reverse direction along the central axis of the rotating shaft 41. At this time, the sliding sleeve 45 drives the linkage rod 431 through the second mounting bracket 451. The linkage rod 431 rotates in the reverse direction around the hinge of the second mounting bracket 451, causing the central axis of the linkage rod 431 to gradually become parallel to the central axis of the rotating shaft 41. At the same time, the linkage rod 431 drives the clamping rod 43 to rotate in the reverse direction around the hinge with the first mounting bracket 411. At this time, the end of the clamping rod 43 away from the linkage rod 431 separates from the slot 51. This allows for quick disassembly of the sleeve 5, solving the problem of inconvenient replacement of the sleeve 5.

[0036] See Figure 5 and Figure 8 As shown, a limiting block 413 for limiting the sliding sleeve 45 is fixed on the outer circumferential surface of the rotating shaft 41.

[0037] A limiting groove 452 is provided on the inner circumferential surface of the sliding sleeve 45 to slide and engage with the limiting block 413.

[0038] To ensure the stability of the sliding sleeve 45, a limiting groove 452 is provided on the inner circumferential surface of the sliding sleeve 45. When the sliding sleeve 45 moves, the limiting block 413 will move along the limiting groove 452, so that the limiting block 413 and the limiting groove 452 cooperate to limit the sliding sleeve 45, effectively preventing axial rotation of the sliding sleeve 45 during movement, thereby ensuring the stability of the sliding sleeve 45.

[0039] See Figure 3 and Figure 4 As shown, the rotating shaft 41 has an external thread 412 that is threaded to engage with the internal thread rotating sleeve 42.

[0040] To enable the internal threaded rotating sleeve 42 to move along the central axis of the rotating shaft 41, an external thread 412 is provided on the outside of the rotating shaft 41, and the external thread 412 is threadedly engaged with the internal threaded rotating sleeve 42. When the internal threaded rotating sleeve 42 rotates, it uses the meshing action of the internal thread and the external thread 412 to achieve helical movement of the internal threaded rotating sleeve 42 along the central axis of the rotating shaft 41.

[0041] See Figure 3 and Figure 4 As shown, a polygonal prism 47 is provided at one end of the rotation axis 41;

[0042] The mounting head 5 has a mounting groove 52 that is adapted to the polygonal column 47, and the mounting groove 52 is fitted onto the polygonal column 47.

[0043] To enable the rotating shaft 41 to effectively drive the sleeve head 5 to rotate, a polygonal column 47 is fixed to one end of the rotating shaft 41, and then the sleeve head 5 is mounted on the polygonal column 47 through the mounting groove 52. When the rotating shaft 41 rotates, the rotating shaft 41 can drive the sleeve head 5 to rotate synchronously by the cooperation between the polygonal column 47 and the mounting groove 52.

[0044] See Figure 1 and Figure 2 As shown, a reinforcing sleeve 3 is fixed on one side of the servo motor 2. The reinforcing sleeve 3 is sleeved on the rotating shaft 41. A bearing 31 sleeved on the rotating shaft 41 is fixed inside the end of the reinforcing sleeve 3 away from the servo motor 2.

[0045] To ensure the stability of the rotating shaft 41, it is installed inside the reinforcing sleeve 3 and the bearing 31. When the servo motor 2 drives the rotating shaft 41 to rotate, the bearing 31 installed inside the reinforcing sleeve 3 limits the rotation of the shaft 41. This effectively avoids the problem of vibration during high-speed rotation of the rotating shaft 41, thus ensuring its stability.

[0046] The above embodiments only illustrate one or more implementation methods of this utility model application, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this utility model application. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of this utility model application, and these all fall within the protection scope of this utility model application. Therefore, the protection scope of this utility model application should be determined by the appended claims.

Claims

1. An electric wrench for quick and easy socket changing, comprising a robotic arm (1), a servo motor (2) disposed at the working end of the robotic arm (1), a mounting part (4) disposed at the output end of the servo motor (2), and a socket (5) mounted on the mounting part (4), characterized in that, The outer circumference of the sleeve (5) is provided with slots (51) at equal intervals around its central axis. The mounting part (4) includes a rotating shaft (41) fixed to the output end of the servo motor (2). On the outer circumference of the other end of the rotating shaft (41), a plurality of first mounting brackets (411) are equidistantly arranged around its central axis. The first mounting bracket (411) has a clamping rod (43) hinged on it for fixing the sleeve (5). One end of the clamping rod (43) is hinged to a linkage rod (431). The rotating shaft (41) is fitted with a sliding sleeve (45) that can move along its central axis. Several second mounting brackets (451) are fixed at equal intervals on the outer circumference of the sliding sleeve (45). The end of the linkage rod (431) away from the clamping rod (43) is hinged to the second mounting bracket (451). The rotating shaft (41) is also rotatably mounted with an internally threaded rotating sleeve (42) that can move along its central axis.

2. The electric wrench for quick and easy socket changing according to claim 1, characterized in that, A spring seat (44) is fixed on the outer circumference of the rotating shaft (41) near the side of the first mounting bracket (411). A reset spring (46) for driving the sliding sleeve (45) to reset is provided on the side of the spring seat (44). The reset spring (46) is sleeved on the first mounting bracket (411).

3. The electric wrench for easy and quick socket changing according to claim 1, characterized in that, A limiting block (413) for limiting the sliding sleeve (45) is fixed on the outer circumferential surface of the rotating shaft (41). The inner circumferential surface of the sliding sleeve (45) is provided with a limiting groove (452) that slides and engages with the limiting block (413).

4. The electric wrench for quick and easy socket changing according to claim 1, characterized in that, The rotating shaft (41) has an external thread (412) that engages with the internal thread rotating sleeve (42).

5. An electric wrench for quick and easy socket changing according to claim 1, characterized in that, One end of the rotation axis (41) is provided with a polygonal column (47). The mounting head (5) has a mounting groove (52) adapted to the polygonal column (47), and the mounting groove (52) is fitted onto the polygonal column (47).

6. An electric wrench for quick and easy socket changing according to claim 1, characterized in that, A reinforcing sleeve (3) is fixed on one side of the servo motor (2). The reinforcing sleeve (3) is sleeved on the rotating shaft (41). A bearing (31) sleeved on the rotating shaft (41) is fixed inside the end of the reinforcing sleeve (3) away from the servo motor (2).

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