Torque handle for medical electric drill

Abstract

The present invention discloses a torque handle for a medical electric drill, comprising a housing body, a main shaft, a pulling sleeve and a core sleeve. A fixing nut, an adjusting nut, a disc spring, an adjusting clutch and a fixing clutch are sequentially provided on the main shaft from the rear cover of the housing to the front cover of the housing. The rear cover of the housing is used to limit the movement of the fixing nut. An end of the rear cover of the housing away from the pulling sleeve extends out of the housing body and can be installed on a medical electric drill to cooperate with upper limb surgical instruments for tightening screws. The present invention is compact and lightweight, and a 1.5 Nm force limit can quickly and easily achieve screw locking, thereby eliminating the need for manual screw locking and greatly shortening surgical time.

Description

Technical Field

[0001] The invention belongs to the technical field of medical devices, and in particular relates to a torque handle for a medical electric drill. Background Art

[0002] Orthopedic surgeries often require screw implants, requiring a tightening torque that is neither too high nor too low. Excessive torque can damage the implant or the bone; too low a torque can lead to a loose implant fixation and a weak connection to the bone, potentially causing surgical failure. Manually tightening screws with uncontrollable torque can also prolong surgery. Summary of the Invention

[0003] In order to solve the above technical problems, the present invention provides a torque handle for a medical electric drill, which can be installed on the medical electric drill to cooperate with the locking screw of the upper limb surgical instrument. The limited torque can easily and quickly achieve the locking screw.

[0004] A torque handle for a medical electric drill comprises a shell body, a main shaft, a pull sleeve and a core sleeve, the main shaft being arranged in the shell body, the core sleeve being arranged in the pull sleeve, a spring being arranged outside the core sleeve, one end of the spring being connected to the core sleeve, and the other end of the spring being connected to the pull sleeve, one end of the main shaft extending into the pull sleeve and fixedly connected to the core sleeve, a sealing cover being provided at an end of the pull sleeve close to the shell body, a shell front cover being provided at an end of the shell body close to the pull sleeve, a shell rear cover being provided at an end of the shell body away from the pull sleeve, and an end of the shell rear cover away from the pull sleeve extending out of the shell body for connecting to a medical electric drill, a fixing nut, an adjusting nut, a disc spring, an adjusting clutch and a fixing clutch being provided on the main shaft in the direction from the shell rear cover to the shell front cover, and the shell rear cover being used to limit the movement of the fixing nut.

[0005] The above technical solution is preferred, wherein a thrust bearing is provided in the front cover of the housing, a ball bearing is provided in the rear cover of the housing, one end of the main shaft is provided in the inner ring of the ball bearing, and the other end of the main shaft passes through the thrust bearing and the front cover of the housing and is fixedly connected to the core sleeve.

[0006] Preferably, the fixing nut is evenly distributed with three threaded holes, each threaded hole is provided with a set screw, and one end of the housing rear cover close to the pull sleeve abuts against the set screw.

[0007] The above technical solution is preferred, wherein the disc spring has a thickness of 0.8 mm.

[0008] Preferably, the above technical solution is that the fixed clutch is connected to the main shaft via a pin.

[0009] Preferably, the above technical solution has two blocks symmetrically connected to the outer circumference of the regulating clutch, and the blocks are slidably connected to the inner wall of the housing body.

[0010] Preferably, the above technical solution is that the front cover of the shell is provided with an external thread, the shell body is correspondingly provided with an internal thread, and a sealing ring is provided between the front cover of the shell and the shell body.

[0011] Preferably, the above technical solution is that the fixed clutch is located inside the front cover of the housing.

[0012] Preferably, the above technical solution is that the rear cover of the shell is provided with an external thread, the shell body is correspondingly provided with an internal thread, and a sealing ring is provided between the rear cover of the shell and the shell body.

[0013] Preferably, the above technical solution is that the main shaft is welded to the core sleeve.

[0014] The advantages and positive effects of the present invention are as follows: the present invention provides a torque handle for a medical electric drill, comprising a shell body, a main shaft, a pulling sleeve and a core sleeve; a fixing nut, an adjusting nut, a disc spring, an adjusting clutch and a fixing clutch are sequentially provided on the main shaft from the rear cover of the shell to the front cover of the shell; the rear cover of the shell is used to limit the movement of the fixing nut; the end of the rear cover of the shell away from the pulling sleeve extends out of the shell body, and can be installed on a medical electric drill to cooperate with upper limb surgical instruments for tightening screws; the present invention is compact and light, and the 1.5 Nm force limit can quickly and easily achieve screw locking, thereby eliminating the need for manual screw locking and greatly shortening the operation time. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 1 is a schematic structural diagram of a torque handle provided by one embodiment of the present invention;

[0016] Figure 2 yes Figure 1 AA cross-sectional view.

[0017] Among them: 1. Pull sleeve; 2. Core sleeve; 3. Steel ball; 4. Spring; 5. Cover; 6. Main shaft; 7. Sealing ring; 8. Front cover of the housing; 9. Thrust bearing; 10. Housing body; 11. Fixed clutch; 12. Pin; 13. Adjusting clutch; 14. Stopper; 15. Disc spring; 16. Adjusting nut; 17. Fixed nut; 18. Set screw; 19. Back cover of the housing; 20. Ball bearing; 21. Sealing ring. DETAILED DESCRIPTION

[0018] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0019] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0020] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0021] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0022] This embodiment provides a torque handle for a medical electric drill, such as Figure 1 、 2 As shown, it includes a shell body 10, a main shaft 6, a pull sleeve 1 and a core sleeve 2, the main shaft 6 is arranged in the shell body 10, the core sleeve 2 is arranged in the pull sleeve 1, and a spring 4 is provided on the outer sleeve of the core sleeve 2, one end of the spring 4 is connected to the core sleeve 2, and the other end of the spring 4 is connected to the pull sleeve 1, one end of the main shaft 6 extends into the pull sleeve 1 and is fixedly connected to the core sleeve 2, the pull sleeve 1 is provided with a sealing cover 5 at the end close to the shell body 10, the shell body 10 is provided with a shell front cover 8 at the end close to the pull sleeve 1, the shell body 10 is provided with a shell rear cover 19 at the end away from the pull sleeve 1, and the shell rear cover 19 extends out of the shell body 10 at the end away from the pull sleeve 1 for connecting a medical electric drill, and a fixing nut 17, an adjusting nut 16, a disc spring 15, an adjusting clutch 13 and a fixing clutch 11 are provided on the main shaft 6 in the direction from the shell rear cover 19 to the shell front cover 8, and the shell rear cover 19 is used to limit the movement of the fixing nut 17.

[0023] A thrust bearing 9 is housed within the front housing cover 8, and a ball bearing 20 is housed within the rear housing cover 19. One end of the main shaft 6 is positioned within the inner ring of the ball bearing 20, while the other end of the main shaft 6 passes through the thrust bearing 9 and the front housing cover 8 and is fixedly connected to the core sleeve 2. The main shaft 6 partially extends into the core sleeve 2, and the two are welded to each other. In this embodiment, the thrust bearing 9 is a one-way thrust ball bearing, and the ball bearing 20 is a deep groove ball bearing.

[0024] There are three threaded holes evenly distributed on the fixing nut 17, and set screws 18 are provided in the threaded holes. The end of the rear cover 19 of the housing close to the pull sleeve 1 abuts against the set screws 18. After a period of use, the elasticity of the disc spring 15 may decrease. The disc spring 15 is adjusted by twisting the adjusting nut 16 to prevent the disc spring 15 from failing and causing the torque value of the torque handle to be substandard. The fixing nut 17 is used to tighten the adjusting nut 16 to prevent the adjusting nut 16 from loosening. Adjust the depth of the set screw 18 into the fixing nut 17 so that the set screw 18 abuts against the end of the rear cover 19 of the housing close to the pull sleeve 1, thereby fixing the adjusting nut.

[0025] In this embodiment, the disc spring 15 has a thickness of 0.8 mm. The number of disc springs 15 can be adjusted according to the torque value. A steel ball 3 is positioned within the core sleeve 2. The fixed clutch 11 is connected to the main shaft 6 via a pin 12. Two stoppers 14 are symmetrically connected to the outer circumference of the adjustable clutch 13 and are slidably connected to the inner wall of the housing body 10.

[0026] The front cover 8 has external threads, the housing body 10 has corresponding internal threads, and a sealing ring 7 is installed between the front cover 8 and the housing body 10. A fixed clutch 11 is located inside the front cover 8, making the overall structure compact. The rear cover 19 has external threads, the housing body 10 has corresponding internal threads, and a sealing ring 21 is installed between the rear cover 19 and the housing body 10. During assembly, the external threads of the rear cover 19 are coated with thread glue to further ensure a tight seal.

[0027] The torque handle for the medical electric drill provided in this embodiment has a right-hand rotation direction in its working state and should be subjected to a running-in test before leaving the factory. The torque value is limited to a range of 1.5 Nm ± 0.1 Nm.

[0028] The present invention provides a torque handle for a medical electric drill, comprising a housing body 10, a spindle 6, a pulling sleeve 1 and a core sleeve 2. A fixing nut 17, an adjusting nut 16, a disc spring 15, an adjusting clutch 13 and a fixing clutch 11 are provided on the spindle 6 in sequence from the housing rear cover 19 to the housing front cover 8. The housing rear cover 19 is used to limit the movement of the fixing nut 17; the end of the housing rear cover 19 away from the pulling sleeve 1 extends out of the housing body 10, and can be installed on a medical electric drill to cooperate with upper limb surgical instruments for tightening screws; the present invention is compact and lightweight, and the 1.5 Nm force limit can quickly and easily achieve screw locking, thereby eliminating the need for manual screw locking and greatly shortening the operation time.

[0029] The above is a detailed description of an embodiment of the present invention. However, the content described is only a preferred embodiment of the present invention and should not be considered to limit the scope of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A torque handle for a medical electric drill, characterized by: The invention comprises a shell body (10), a main shaft (6), a pull sleeve (1) and a core sleeve (2), wherein the main shaft (6) is arranged in the shell body (10), the core sleeve (2) is arranged in the pull sleeve (1), a spring (4) is provided on the outer sleeve of the core sleeve (2), one end of the spring (4) is connected to the core sleeve (2), and the other end of the spring (4) is connected to the pull sleeve (1), one end of the main shaft (6) extends into the pull sleeve (1) and is fixedly connected to the core sleeve (2), a cover (5) is provided on one end of the pull sleeve (1) close to the shell body (10), and the shell body (10) close to the pull sleeve (1) is provided with a cover (5). One end of the pull sleeve (1) is provided with a shell front cover (8), and the end of the shell body (10) away from the pull sleeve (1) is provided with a shell rear cover (19), and the end of the shell rear cover (19) away from the pull sleeve (1) extends out of the shell body (10) and is used to connect a medical electric drill. The main shaft (6) is provided with a fixing nut (17), an adjusting nut (16), a disc spring (15), an adjusting clutch (13) and a fixing clutch (11) in sequence from the shell rear cover (19) to the shell front cover (8), and the shell rear cover (19) is used to limit the movement of the fixing nut (17).

2. The torque handle for a medical electric drill according to claim 1, characterized in that: A thrust bearing (9) is provided in the front cover (8) of the housing, a ball bearing (20) is provided in the rear cover (19) of the housing, one end of the main shaft (6) is provided in the inner ring of the ball bearing (20), and the other end of the main shaft (6) passes through the thrust bearing (9) and the front cover (8) of the housing and is fixedly connected to the core sleeve (2).

3. The torque handle for a medical electric drill according to claim 2, characterized in that: The fixing nut (17) is evenly distributed with three threaded holes, and a set screw (18) is provided in the threaded hole. One end of the housing rear cover (19) close to the pull sleeve (1) abuts against the set screw (18).

4. The torque handle for a medical electric drill according to claim 1, characterized in that: The disc spring (15) has a thickness of 0.8 mm.

5. The torque handle for a medical electric drill according to claim 1, characterized in that: The fixed clutch (11) is connected to the main shaft (6) via a pin (12).

6. The torque handle for a medical electric drill according to claim 1, characterized in that: Two stoppers (14) are symmetrically connected to the outer circumference of the regulating clutch (13), and the stoppers (14) are slidably connected to the inner wall of the housing body (10).

7. The torque handle for a medical electric drill according to claim 1, characterized in that: The housing front cover (8) is provided with an external thread, the housing body (10) is correspondingly provided with an internal thread, and a sealing ring (7) is provided between the housing front cover (8) and the housing body (10).

8. The torque handle for a medical electric drill according to claim 7, characterized in that: The fixed clutch (11) is located inside the housing front cover (8).

9. The torque handle for a medical electric drill according to claim 1, characterized in that: The shell rear cover (19) is provided with an external thread, the shell body (10) is correspondingly provided with an internal thread, and a sealing ring (21) is provided between the shell rear cover (19) and the shell body (10).

10. The torque handle for a medical electric drill according to claim 1, characterized in that: The main shaft (6) is welded to the core sleeve (2).

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