Reaming Soft Drill

Abstract

This invention relates to the field of medical device technology, specifically disclosing a reamer soft drill, including a connecting rod, a drill bit, and a locking sleeve. The drill bit has a positioning shaft with a limiting groove formed therein. The end of the connecting rod is provided with a limiting platform adapted to the limiting groove, and the limiting platform is detachably inserted into the limiting groove. The inner wall of the locking sleeve has an internal thread. The connecting rod and the positioning shaft have the same diameter, and both have external threads on their outer circumferential surfaces that mate with the internal thread. When the locking sleeve is turned, it can move to the connection point between the connecting rod and the positioning shaft to maintain the position of the drill bit relative to the connecting rod. This solves the problems of unstable connection and unstable use in existing reamer soft drills.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically to a soft drill for reaming the spinal cord and a method for operating the hip joint exoskeleton rehabilitation robot. Background Technology

[0002] Intramedullary nailing surgery commonly utilizes reamers, which consist of a connecting rod and a drill bit that engages at the end of the connecting rod. Because the drill bit and connecting rod are only connected vertically by a protrusion and a blocking groove, there is no horizontal constraint. Therefore, during intramedullary nailing reaming, hollow and solid drills must be used alternately. When using a solid drill, because it cannot be guided by a ball-tipped guide, the drill bit and connecting rod are only connected by the blocking groove and protrusion, leaving no horizontal constraint. This poses a risk of the drill bit falling into the medullary cavity, requiring surgical removal, which increases surgical risk and endangers the patient's life. While hollow drills are guided by a ball-tipped guide, preventing the drill bit from falling horizontally, the drill bit still has some movement, leading to errors during reaming and affecting surgical outcomes. Furthermore, many hospitals do not possess hollow drills specifically designed for surgical use.

[0003] Given the problems of unstable connection and unstable use of the reamer drill during operation, a more reasonable technical solution is needed to solve the current technical problems. Summary of the Invention

[0004] The purpose of this invention is to provide a reamer drill to solve the problems of unstable connection and unstable use of existing reamer drills.

[0005] To achieve the above objectives, the present invention provides a reamer soft drill, comprising a connecting rod, a drill bit, and a locking sleeve; the drill bit has a positioning shaft, in which a limiting groove is formed, and the end of the connecting rod is provided with a limiting platform adapted to the limiting groove, the limiting platform being detachably inserted into the limiting groove;

[0006] The inner wall of the locking sleeve has an internal thread, the connecting rod and the positioning shaft have the same diameter, and both of their outer circumferential surfaces are provided with external threads that mate with the internal thread; when the locking sleeve is turned, the locking sleeve can move to the connection point of the connecting rod and the positioning shaft to maintain the position of the drill bit relative to the connecting rod.

[0007] In one possible design, the outer periphery of the connecting rod is formed with a tack groove to give the connecting rod tack.

[0008] In one possible design, the grooves are arranged circumferentially and extend at uniform intervals along the axial direction of the connecting rod.

[0009] In one possible design, the groove is inclined relative to the axis of the connecting rod, with an inclination angle α of 10° to 30°.

[0010] In one possible design, the groove has an extended groove that deviates from its outline.

[0011] In one possible design, the end of the connecting rod is connected to a stop shaft, the diameter of which is larger than that of the connecting rod.

[0012] In one possible design, the connecting rod and the stop shaft are integrally formed.

[0013] In one possible design, the drill bit has multiple inclined cutting edges, the gap between adjacent cutting edges forms a chip removal groove, and each cutting edge has a blocking groove arranged along the circumference of the drill bit.

[0014] In one possible design, the walls of both the chip removal groove and the blocking groove are formed as arc surfaces.

[0015] In one possible design, the outer periphery of the locking sleeve is formed with a friction portion for increasing friction.

[0016] In one possible design, the friction part is formed as a grid-like texture.

[0017] With the above technical solution, in the non-working state, the locking sleeve of the reaming drill can slide freely on the connecting rod and has a threaded limiting structure at the bottom, so it will not fall off. When the reaming drill is in the working state, the locking sleeve is screwed onto the external thread at the connection between the drill bit and the connecting rod. At this time, the connection state of the reaming drill is as shown in the attached figure. At this time, the drill bit and the connecting rod can be stably connected. Whether using a hollow or solid drill bit, it will not fall off and can be used with both. The stable connection greatly reduces errors.

[0018] Other features and advantages of the present invention will be described in detail in the following detailed description section. Attached Figure Description

[0019] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the following detailed description to explain the invention, but do not constitute a limitation thereof. In the drawings:

[0020] Figure 1 This is a schematic diagram of the structure of a reamer in one embodiment, wherein the reamer is in a non-working state;

[0021] Figure 2 yes Figure 1 Enlarged structural diagram of section A;

[0022] Figure 3 This is a schematic diagram of the structure of a reamer in one embodiment, wherein the reamer is in operation.

[0023] Explanation of reference numerals in the attached figures

[0024] 1-Connecting rod, 11-Limiting platform, 2-Drill bit, 21-Cutting edge, 22-Chip removal groove, 23-Blocking groove, 3-Locking sleeve, 31-Friction part, 4-Positioning shaft, 41-Limiting groove, 51-Tough groove, 52-Extension groove, 6-Stop shaft. Detailed Implementation

[0025] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0026] According to a specific embodiment of the present invention, a soft drill for reaming is provided. Wherein, Figures 1 to 3 One specific embodiment is shown.

[0027] See Figures 1 to 3 As shown, the reamer includes a connecting rod 1, a drill bit 2, and a locking sleeve 3. The drill bit 2 has a positioning shaft 4, in which a limiting groove 41 is formed. The end of the connecting rod 1 is provided with a limiting platform 11 that is adapted to the limiting groove 41, and the limiting platform 11 is detachably inserted into the limiting groove 41. The inner wall of the locking sleeve 3 is formed with an internal thread. The connecting rod 1 and the positioning shaft 4 have the same diameter, and both have external threads on their outer circumferential surfaces that mate with the internal thread. When the locking sleeve 3 is turned, the locking sleeve 3 can move to the connection point between the connecting rod 1 and the positioning shaft 4 to maintain the position of the drill bit 2 relative to the connecting rod 1.

[0028] Through the above technical solution, when the reamer is not in operation, the locking sleeve 3 can slide freely on the connecting rod 1 and has a threaded limiting structure at the bottom, so it will not fall off. When the reamer is in operation, the locking sleeve 3 is screwed onto the external thread at the connection between the drill bit 2 and the connecting rod 1. At this time, the connection state of the reamer is as follows: Figure 3 As shown, at this time, the drill bit 2 and the connecting rod 1 can be stably connected. Whether using a hollow electric drill or a solid electric drill, the drill bit 2 will not fall off and can be used with both. The stable connection greatly reduces errors.

[0029] In one embodiment provided in this disclosure, the outer periphery of the connecting rod 1 is formed with a ductile groove 51 to make the connecting rod 1 flexible, so that the connecting rod 1 can be bent and deformed to adapt to the bending structure of the medullary cavity, so that the drill bit 2 can be inserted into the medullary cavity as a whole.

[0030] Specifically, the grooves 51 are arranged circumferentially and extend at uniform intervals along the axial direction of the connecting rod 1. This increases the deformation range of the connecting rod 1, thereby improving its adaptability to the medullary cavity.

[0031] Furthermore, the groove 51 is inclined relative to the axis of the connecting rod 1, with an inclination angle α of 10° to 30°. This arrangement allows the connecting rod 1 to maintain good rigidity while deforming uniformly. This ensures effective power transmission and better adapts to different bending structures within the medullary cavity.

[0032] In this disclosure, the inclination angle α of the groove 51 is 15°. In other embodiments, the inclination angle α of the groove 51 can also be set to 10°, 20°, 25°, or 30°. Those skilled in the art can make comprehensive reference settings based on the specifications of the connecting rod 1 and the groove depth and width of the groove 51.

[0033] In one embodiment provided in this disclosure, the ductile groove 51 has an extended groove 52 that deviates from its contour line. This design allows the connecting rod 1 to have better resistance to torsional fracture. Consequently, the connecting rod 1 has better toughness and rigidity, enabling it to better adapt to the bending structure of the medullary cavity while effectively transmitting power, thereby ensuring its performance.

[0034] In this disclosure, the end of the connecting rod 1 is connected to a stop shaft 6, the diameter of which is larger than that of the connecting rod 1. This not only limits the locking sleeve 3 but also ensures stable power transmission in this section.

[0035] To ensure connection strength, the connecting rod 1 and the stop shaft 6 are integrally formed, which not only facilitates manufacturing but also ensures the reliability of the connection relationship and is beneficial for power transmission. This facilitates use during surgery, makes the connection between the drill bit 2 and the connecting rod 1 more stable, reduces surgical risks, and minimizes errors in medullary reaming.

[0036] In one exemplary embodiment provided in this disclosure, the drill bit 2 has multiple inclined cutting edges 21, and the gaps between adjacent cutting edges 21 form chip removal grooves 22. Each cutting edge 21 is provided with a blocking groove 23 arranged along the circumference of the drill bit 2. This helps the drill bit 2 to expand the medullary cavity and reduces surgical risks.

[0037] In a preferred embodiment, the walls of both the chip removal groove 22 and the blocking groove 23 are formed as arc surfaces. This prevents chip accumulation and facilitates chip removal and subsequent cleaning and maintenance.

[0038] To facilitate operation, the outer periphery of the locking sleeve 3 is formed with a friction part 31 to increase friction. This increases the friction between the locking sleeve 3 and the hand, making it easier for medical staff to adjust the position of the locking sleeve 3 so that the locking sleeve 3 can be quickly and effectively adjusted to the target position to meet different needs.

[0039] In this disclosure, the friction part 31 is formed with a grid-like texture, which can effectively improve the feel during operation and thus adjust the locking sleeve 3 to the target position.

[0040] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the protection scope of the present invention.

Claims

1. A reaming soft drill, characterized by, The utility model provides a drill rod, which comprises a connecting rod (1), a drill bit (2) and a locking sleeve (3), wherein the drill bit (2) is provided with a positioning shaft (4) having a limiting groove (41) formed therein, the end of the connecting rod (1) is provided with a limiting platform (11) matched with the limiting groove (41), and the limiting platform (11) is inserted into the limiting groove (41) in a detachable manner. The inner wall of the locking sleeve (3) is provided with an internal thread, the connecting rod (1) and the positioning shaft (4) have the same diameter, and the outer circumferential surfaces of the connecting rod (1) and the positioning shaft (4) are provided with external threads matched with the internal thread of the locking sleeve (3), and when the locking sleeve (3) is screwed, the locking sleeve (3) can be moved to the joint of the connecting rod (1) and the positioning shaft (4) to keep the position of the drill bit (2) relative to the connecting rod (1). The outer circumference of the connecting rod (1) is provided with a flexible groove (51) so that the connecting rod (1) has flexibility. The end of the connecting rod (1) is connected with a stop shaft (6), and the diameter of the stop shaft (6) is larger than that of the connecting rod (1). The drill bit (2) is provided with a plurality of obliquely arranged cutting edges (21), the gap between adjacent cutting edges (21) is formed into a chip removal groove (22), and each cutting edge (21) is provided with a blocking groove (23) arranged along the circumferential direction of the drill bit (2).

2. The broach of claim 1, wherein, The flexible groove (51) is arranged in a ring shape, and the flexible groove (51) is uniformly spaced along the axis direction of the connecting rod (1).

3. The broach of claim 1, wherein, The flexible groove (51) is obliquely arranged relative to the axis of the connecting rod (1), and the oblique angle a is 10°-30°.

4. The broach of claim 1, wherein, The flexible groove (51) has an extension groove (52) deviating from the profile line thereof.

5. The broach of claim 1, wherein, The connecting rod (1) and the stop shaft (6) are integrally formed.

6. The broach of claim 1, wherein, The groove walls of the chip removal groove (22) and the blocking groove (23) are formed into arc surfaces.

7. The reamer according to any one of claims 1 to 4, wherein, The outer circumference of the locking sleeve (3) is provided with a friction portion (31) for increasing friction, and the friction portion (31) is formed into a grid-shaped pattern.

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