Transmission mechanism of movable claw of electric wrench

Abstract

The utility model relates to the technical field of electric wrenches, in particular to a transmission mechanism of a movable claw of an electric wrench, which comprises a lower surface cover, an upper surface cover is fixed on the surface of the lower surface cover through bolts, one end of the upper surface cover and one end of the lower surface cover are fixedly sleeved with an adapter gearbox, and one end of the adapter gearbox is fixedly provided with a servo motor through four bolts. Two sets of wear-resistant rings are fixed in the lower surface cover and the upper surface cover, a transmission assembly is arranged between every two adjacent wear-resistant rings, a rotatable gear ring is arranged on one side of each transmission assembly and located between every two adjacent wear-resistant rings, and a fixing claw is installed on one side of the inner wall of each gear ring. By arranging the steel sleeve shaft, the problem that bearings cannot be installed on the two main idle wheels close to the driving gear side is solved, an integral steel sleeve structure is applied, abrasion resistance of the gear ring is achieved, by arranging the deep groove ball bearing, the problem of idle wheel supporting is solved, and the overall strength of the gear train supporting structure is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electric wrenches, in particular to a transmission mechanism for a movable claw of an electric wrench. Background Technique

[0002] An electric wrench is an essential tool for tightening or loosening bolts or steel bar sleeves. When in use, the electric wrench realizes tightening and loosening by the cooperation of a movable claw and a fixed claw to hold the part to be turned and rotate, and a transmission mechanism is required during rotation.

[0003] The transmission mechanisms of existing electric wrenches are all completed by using a single gear during transmission. The single gear is prone to transmission failure during transmission, which also reduces the safety of the electric wrench during use; at the same time, the two main idler gears on the active tooth side of the existing transmission mechanism cannot install bearings, and the wear resistance of the tooth ring cannot be achieved, and the problem of idler gear support is not stable enough, and the overall strength of the gear train support structure is poor. This brings great trouble to people's use. Content of the Utility Model

[0004] The purpose of the utility model is to provide a transmission mechanism for a movable claw of an electric wrench, so as to solve the problems of easy transmission failure of the transmission mechanism of the existing electric wrench, inability to install bearings on the main idler gears, and inability to achieve wear resistance of the tooth ring mentioned in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A transmission mechanism for a movable claw of an electric wrench, including a lower cover, the surface of the lower cover is fixed with an upper cover by bolts, and one end of the upper cover and the lower cover is sleeved and fixed with a transfer gearbox. One end of the transfer gearbox is fixed with a servo motor by four bolts. Two groups of wear-resistant rings are fixed inside the lower cover and the upper cover, and a transmission component is arranged between adjacent wear-resistant rings. A rotatable tooth ring is arranged on one side of the transmission component and between adjacent wear-resistant rings. One side of the inner wall of the tooth ring is provided with a fixed claw, and an active claw is hinged on one side of the inner wall of the tooth ring where the fixed claw is located, and the active claw and the fixed claw cooperate to hold the part to be turned.

[0006] Preferably, the transmission component is composed of a small bevel gear, a large bevel gear, an active tooth, a main idler gear and a secondary idler gear. One end inside the lower cover and the upper cover is installed with a circumferentially rotatable small bevel gear through a double deep groove ball bearing.

[0007] Preferably, a circumferentially rotatable large bevel gear is installed on one side of the small bevel gear inside the lower cover through a large deep groove ball bearing, and the large bevel gear meshes with the small bevel gear.

[0008] Preferably, a circumferentially rotatable active tooth is installed inside the upper cover through a small deep groove ball bearing, and the bottom end of the active tooth is inserted and fixed with the large bevel gear.

[0009] Preferably, there are two main idler gears. Main steel sleeve shafts are installed at the centers of the two main idler gears. Both the upper and lower ends of the main steel sleeve shafts are rotatably connected to wear-resistant rings through bearings, and both main idler gears are meshed with the driving gear; a driven idler gear is arranged on one side of the main idler gear. Secondary steel sleeve shafts are installed at the centers of the two driven idler gears. Both the upper and lower ends of the secondary steel sleeve shafts are rotatably connected to wear-resistant rings through bearings, and the driven idler gear is meshed with the main idler gear, and at the same time, the driven idler gear is meshed with the gear ring.

[0010] Preferably, a gear shaft steel sleeve is installed inside the lower cover and the upper cover, a gear shaft is rotatably connected inside the gear shaft steel sleeve, one end of the gear shaft is inserted and fixed to the end of the pinion gear, and at the same time, the output shaft end of the servo motor penetrates through the transfer gearbox and is fixed to the other end of the gear shaft.

[0011] Compared with the prior art, the beneficial effects of the present utility model are as follows: The transmission mechanism of the movable claw of the electric wrench is provided with a transmission assembly; when the gear shaft rotates, it will drive the pinion gear to rotate. The rotation of the pinion gear will engage with the large bevel gear to drive the driving gear to rotate. The rotation of the driving gear will cause the main idler gear to rotate. The meshing of the main idler gear and the driven idler gear will drive the gear ring to rotate. When the open end of the gear ring rotates into the inside of the lower cover and the upper cover, the gear ring will disengage from one of them. When disengaging, the other driven idler gear can also engage with the gear ring to achieve transmission, thus realizing the transmission work of the electric wrench; the present utility model is provided with a transmission assembly, and the servo motor drives the transmission assembly to transmit under the action of the gear shaft, causing the gear ring to move. At the same time, the two main idler gears and the driven idler gears increase the stability during transmission, solving the problem that a single gear of the existing electric wrench is prone to transmission failure after long-term use, and improving the safety of the electric wrench during use; at the same time, the present utility model solves the problem that bearings cannot be installed on the two main idler gears close to the driving gear side by setting the steel sleeve shaft, and uses an integral steel sleeve structure, which not only realizes the wear resistance of the gear ring, but also solves the problem of the support of the idler gear by setting deep groove ball bearings and steel sleeve shafts, and also increases the overall strength of the gear train support structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a three-dimensional external structure schematic diagram of the present utility model;

[0013] Figure 2 is a structural schematic diagram of the separated state of the upper cover of the present utility model;

[0014] Figure 3 is a three-dimensional exploded structure schematic diagram of the present utility model;

[0015] Figure 4 is a structural schematic diagram of the inverted state of the transmission assembly of the present utility model.

[0016] In the figure: 1. lower cover; 2. upper cover; 3. adapter gear box; 4. servo motor; 41. gear shaft steel sleeve; 42. gear shaft; 5. transmission assembly; 51. small bevel gear; 511. double deep groove ball bearing; 52. large bevel gear; 521. large deep groove ball bearing; 53. driving gear; 531. small deep groove ball bearing; 54. main idler; 541. main steel sleeve shaft; 55. slave idler; 551. slave steel sleeve shaft; 6. gear ring; 7. movable claw; 8. fixed claw; 9. wear-resistant ring. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. In addition, the terms "first", "second", "third", "upper, lower, left, right", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. At the same time, in the description of the present invention, unless otherwise clearly specified and limited, the terms "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0018] The utility model provides a transmission mechanism of an electric wrench movable claw. Figure 1 as well as Figure 3 As shown, it includes a lower cover 1, the surface of the lower cover 1 is fixed with an upper cover 2 by bolts, and one end of the upper cover 2 and the lower cover 1 is fixed with a transfer tooth box 3, one end of the transfer tooth box 3 is fixed with a servo motor 4 by four bolts, two groups of wear-resistant rings 9 are fixed inside the lower cover 1 and the upper cover 2, and a transmission assembly 5 is arranged between adjacent wear-resistant rings 9, a rotatable gear ring 6 is arranged on one side of the transmission assembly 5 and between adjacent wear-resistant rings 9, a fixed claw 8 is installed on one side of the inner wall of the gear ring 6, and a movable claw 7 with a torsion spring is hinged on the inner wall of the gear ring 6 on one side of the fixed claw 8, and the movable claw 7 and the fixed claw 8 are used together for grasping the wrench (rebar sleeve), a gear shaft steel sleeve 41 is installed inside the lower cover 1 and the upper cover 2, and the gear shaft steel sleeve 41 is rotatably connected with a gear shaft 42, and one end of the gear shaft 42 is plugged and fixed with the end of the small bevel tooth 51, and the output shaft end of the servo motor 4 passes through the transfer tooth box 3 and is fixedly connected to the other end of the gear shaft 42.

[0019] During implementation, the steel bar sleeve to be turned is clamped by the movable claw 7 and the fixed claw 8 under the elastic force of the torsion spring. After clamping, the servo motor 4 drives the gear shaft 42 inside the gear shaft steel sleeve 41 to rotate under the action of the output shaft.

[0020] Further, as Figure 2 and Figure 4 shown, the transmission assembly 5 is composed of a small bevel gear 51, a large bevel gear 52, a driving gear 53, a main idler gear 54 and a driven idler gear 55. One end inside the lower cover 1 and the upper cover 2 is installed with a circumferentially rotatable small bevel gear 51 through a double deep groove ball bearing 511. A circumferentially rotatable large bevel gear 52 is installed inside the lower cover 1 and on one side of the small bevel gear 51 through a large deep groove ball bearing 521, and the large bevel gear 52 meshes with the small bevel gear 51. The driving gear 53 is installed inside the upper cover 2 through a small deep groove ball bearing 531 and is circumferentially rotatable, and the bottom end of the driving gear 53 is fixedly inserted and connected with the large bevel gear 52. There are two main idler gears 54, and main steel sleeve shafts 541 are installed at the centers of the two main idler gears 54. The upper and lower ends of the main steel sleeve shafts 541 are rotationally connected to the wear-resistant ring 9 through bearings, and the two main idler gears 54 are both meshed with the driving gear 53; a driven idler gear 55 is arranged on one side of the main idler gear 54, and driven steel sleeve shafts 551 are installed at the centers of the two driven idler gears 55. The upper and lower ends of the driven steel sleeve shafts 551 are rotationally connected to the wear-resistant ring 9 through bearings, and the driven idler gear 55 meshes with the main idler gear 54, and at the same time the driven idler gear 55 meshes with the gear ring 6.

[0021] During implementation, when the gear shaft 42 rotates, it will drive the small bevel gear 51 to rotate. The rotation of the small bevel gear 51 will mesh with the large bevel gear 52 to drive the driving gear 53 to rotate. The rotation of the driving gear 53 will cause the main idler gear 54 to rotate. The meshing of the main idler gear 54 and the driven idler gear 55 will drive the gear ring 6 to rotate. When the open end of the gear ring 6 turns to the inside of the lower cover 1 and the upper cover 2, the gear ring 6 will disengage from one of the driven idler gears 55. When disengaging, the other driven idler gear 55 can also mesh with the gear ring 6 to achieve transmission, thus realizing the transmission work of the electric wrench.

[0022] Working principle: When in use, the steel bar sleeve to be turned is clamped by the movable claw 7 and the fixed claw 8 under the elastic force of the torsion spring. After clamping, the servo motor 4 drives the gear shaft 42 inside the gear shaft steel sleeve 41 to rotate under the action of the output shaft. When the gear shaft 42 rotates, it will drive the small bevel gear 51 to rotate. The rotation of the small bevel gear 51 will mesh with the large bevel gear 52 to drive the driving gear 53 to rotate. The rotation of the driving gear 53 will cause the main idler gear 54 to rotate. The meshing of the main idler gear 54 and the driven idler gear 55 will drive the gear ring 6 to rotate. When the open end of the gear ring 6 turns to the inside of the lower cover 1 and the upper cover 2, the gear ring 6 will disengage from one of the driven idler gears 55. When disengaging, the other driven idler gear 55 can also mesh with the gear ring 6 to achieve transmission, thus realizing the transmission work of the electric wrench.

[0023] The utility model solves the problem that a single gear is prone to transmission failure after long-term use of the existing electric wrench and improves the safety of the electric wrench during use by arranging a transmission assembly 5, driving the transmission assembly 5 to transmit under the action of a servo motor 4 on a gear shaft 42, enabling a gear ring 6 to move, and increasing the stability during transmission by two main idler gears 54 and a driven idler gear 55.

[0024] The utility model solves the problem that two main idler gears close to the active tooth side cannot be installed with bearings by arranging a steel sleeve shaft, adopts an integral steel sleeve structure, not only realizes the wear resistance of the gear ring, but also solves the problem of idler gear support by arranging deep groove ball bearings and a steel sleeve shaft, and also increases the overall strength of the gear train support structure.

[0025] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above-described exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present utility model. Any reference signs in the claims should not be regarded as limiting the claimed rights.

Claims

1. A transmission mechanism of a movable jaw of an electric wrench, comprising a lower cover (1), characterized in that: The surface of the lower cover (1) is fixed with an upper cover (2) by bolts, and a transfer tooth box (3) is fixedly mounted on one end of the upper cover (2) and the lower cover (1), and a servo motor (4) is fixed to one end of the transfer tooth box (3) by four bolts. Two groups of wear-resistant rings (9) are fixed inside the lower cover (1) and the upper cover (2), and a transmission assembly (5) is arranged between adjacent wear-resistant rings (9). A rotatable tooth ring (6) is arranged on one side of the transmission assembly (5) and between adjacent wear-resistant rings (9). A fixed claw (8) is installed on one side of the inner wall of the tooth ring (6), and a movable claw (7) is hingedly connected to the inner wall of the tooth ring (6) on one side of the fixed claw (8), and the movable claw (7) and the fixed claw (8) cooperate to grasp the wrench to be pulled.

2. The transmission mechanism of the movable jaw of an electric wrench according to claim 1, characterized in that: The transmission assembly (5) is composed of small bevel gears (51), large bevel gears (52), driving gears (53), a main idler gear (54) and a slave idler gear (55). The small bevel gears (51) that can rotate in a circumferential direction are installed at one end of the lower cover (1) and the upper cover (2) via a double deep groove ball bearing (511).

3. The transmission mechanism of the movable jaw of an electric wrench according to claim 2, characterized in that: A large bevel tooth (52) that can rotate in a circumferential direction is installed inside the lower cover (1) and on one side of the small bevel tooth (51) via a large deep groove ball bearing (521), and the large bevel tooth (52) and the small bevel tooth (51) are meshed with each other.

4. The transmission mechanism of the movable jaw of an electric wrench according to claim 3, characterized in that: A driving tooth (53) capable of circumferential rotation is installed inside the upper cover (2) via a small deep groove ball bearing (531), and the bottom end of the driving tooth (53) is plugged and fixed to the large bevel tooth (52).

5. The transmission mechanism of the movable jaw of an electric wrench according to claim 4, characterized in that: Two main idler wheels (54) are provided, and a main steel sleeve shaft (541) is installed at the center of the two main idler wheels (54). The upper and lower ends of the main steel sleeve shaft (541) are rotatably connected to the wear-resistant ring (9) through bearings, and the two main idler wheels (54) are meshed with the driving gear (53); a slave idler wheel (55) is provided on one side of the main idler wheel (54). A slave steel sleeve shaft (551) is installed at the center of the two slave idler wheels (55). The upper and lower ends of the slave steel sleeve shaft (551) are rotatably connected to the wear-resistant ring (9) through bearings, and the slave idler wheel (55) is meshed with the main idler wheel (54), and the slave idler wheel (55) is meshed with the gear ring (6).

6. The transmission mechanism of the movable jaw of an electric wrench according to claim 2, characterized in that: A gear shaft steel sleeve (41) is installed inside the lower cover (1) and the upper cover (2), and a gear shaft (42) is rotatably connected inside the gear shaft steel sleeve (41), and one end of the gear shaft (42) is plugged and fixed to the end of the small bevel gear (51), while the output shaft end of the servo motor (4) passes through the adapter gear box (3) and is fixedly connected to the other end of the gear shaft (42).

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