A face gear structure and tracker connection device

Abstract

The utility model relates to a kind of end face gear disc structure and tracker connecting device, end face gear disc structure includes tooth slot end and tooth tip end, tooth slot end has the continuous concave tooth slot of uniform arrangement and spread over its end face, tooth tip end has the convex tooth tip of uniform arrangement and not spread over its end face, convex tooth tip and concave tooth slot form asymmetric spaced meshing structure, the utility model can solve the technical problems of the deficiencies of the reliability and anti-interference capability of the fixing mode based on end face gear disc in prior art.

Description

Technical Field

[0001] This utility model belongs to the field of medical equipment technology, specifically relating to an end face toothed disc structure and a tracker connection device. Background Technology

[0002] In modern minimally invasive surgery and computer-assisted surgical systems, surgical robots are widely used to improve the precision and safety of surgeries. Optical navigation systems, as a crucial component of surgical robots, typically include one or more optical cameras and optical trackers attached to the patient's anatomical structures. The optical cameras capture the position and orientation of markers on the tracker in real time, thereby achieving spatial localization of the patient's anatomical sites. To ensure positioning accuracy, the spatial relative position between the optical camera and the tracker must remain highly stable. Therefore, existing technologies often employ mechanical locking structures (such as end-face toothed disc connection mechanisms) to secure the tracker's mounting bracket or support arm, preventing relative displacement during surgery caused by external forces, equipment movement, or environmental vibrations.

[0003] However, existing end-face toothed disc locking structures have certain technical defects in practical applications. For example, manufacturing tolerances, assembly errors, or improper operation may lead to incomplete engagement of the toothed discs. In this case, even slight external disturbances or continuous minor vibrations may cause slight relative rotation between the end-face toothed discs, resulting in a shift in the spatial position or orientation of the tracker. This directly affects the calibration accuracy of the optical navigation system, causing inaccurate spatial mapping between surgical instruments and the patient's anatomical structures. Once positioning failure occurs, the surgical procedure must be interrupted, and the tracker must be recalibrated or reset. This not only significantly reduces surgical efficiency and prolongs the patient's anesthesia time but may also introduce positioning errors during critical operational stages, posing a potential risk to patient safety. Utility Model Content

[0004] To address the shortcomings of existing technologies, an end-face gear disk structure and a tracker connection device are proposed to solve the technical problems of insufficient reliability and anti-interference capability of existing technologies based on end-face gear disk fixing methods.

[0005] To achieve the above objectives, this utility model provides the following technical solution: In a first aspect, the present invention provides an end face toothed disc structure, including a tooth groove end and a tooth tip. The tooth groove end has a continuous concave tooth groove that is evenly arranged and covers its end face, and the tooth tip has a convex tooth tip that is evenly arranged and does not cover its end face. The convex tooth tip and the concave tooth groove form an asymmetrical intermittent meshing structure.

[0006] The technical solution is further configured such that the bottom of the concave tooth groove and the junction of adjacent concave tooth grooves are both rounded.

[0007] The technical solution is further configured such that the top of the convex tooth tip and its root are both rounded.

[0008] The technical solution is further configured such that the root fillets of adjacent convex tooth tips are connected by a continuous curved surface.

[0009] The technical solution is further configured such that the included angle of the convex tooth tip is N times the included angle of the concave tooth groove, where N≥1.

[0010] The technical solution is further configured such that a groove is provided at the bottom of the concave tooth groove.

[0011] The technical solution is further configured such that the number of concave tooth grooves is greater than the number of convex tooth tips, and adjacent convex tooth tips are distributed with n concave tooth grooves spaced apart, where n≥1 and n is an integer.

[0012] Secondly, this utility model provides a tracker connection device, including two connectors, which are respectively connected to a bone needle connector and a tracker, and the two connectors are connected through the end face toothed disc structure.

[0013] The technical solution is further configured to include a fixing member, which sequentially passes through the two connecting members and the end face toothed disc structure. The fixing member is provided with an external thread, and one of the connecting members is provided with an internal thread hole that matches the external thread.

[0014] The technical solution is further configured such that an elastic element is provided between the fixing member and the two connecting members. The beneficial effects of this utility model are: 1. Abandoning the traditional double-sided symmetrical end face gear disk design with an equal number of teeth, it adopts an asymmetrical intermittent meshing structure, which creates space for increasing the size of individual teeth (such as tooth height) and optimizing tooth profile design (such as rounded corners), while retaining the force balance advantage brought by uniform arrangement; by increasing tooth height, the contact area of ​​the tooth side surface during meshing can be increased, increasing the ability to resist lateral forces and vibrations, and making the connection more stable; the rounded corner design acts as a chamfer and guide surface, making it easier for the convex tooth tip to slide into the concave tooth groove, avoiding false locking caused by tooth tip abutting, and ensuring that it can be fully locked only in the correct meshing position.

[0015] 2. Through the cooperation of two connectors and the end face toothed disc structure, combined with the locking of the fixing parts, an integral rigid connection is formed, which ensures that the relative position between the bone needle connector and the tracker is fixed, avoiding the risk of the tracker loosening due to improper connection during surgery. Attached Figure Description

[0016] Figure 1This is a schematic diagram of the end face toothed disk structure in an embodiment of this utility model; Figure 2 This is a schematic diagram of the tooth tip in an embodiment of this utility model; Figure 3 This is a schematic diagram of the toothed end in an embodiment of this utility model; Figure 4 This is a schematic diagram of another embodiment of the toothed end in this utility model; Figure 5 This is a schematic diagram of the tracker connection device in an embodiment of this utility model; Figure 6 This is another perspective view of the tracker connection device in this utility model embodiment; Figure 7 yes Figure 6 Sectional view of AA; Figure 8 This is an assembly diagram of the tracker connection device and the tracker mounting bracket in an embodiment of this utility model.

[0017] In the attached figures: 100, tooth tip; 101, convex tooth tip; 200, tooth groove end; 201, concave tooth groove; 202, groove; 300, first connector; 301, connecting hole; 400, second connector; 500, fixing member; 600, first elastic member; 700, second elastic member; 800, tracker mounting bracket; 900, end face toothed disc structure. Detailed Implementation

[0018] To enable those skilled in the art to better understand the technical solution of this utility model, the technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. Based on the embodiments in this application, other similar embodiments obtained by those skilled in the art without creative effort should all fall within the scope of protection of this application. Furthermore, directional terms mentioned in the following embodiments, such as "up," "down," "left," and "right," are only for reference to the directions in the accompanying drawings; therefore, the directional terms used are for illustrative purposes and not for limiting the invention.

[0019] The present invention will be further described below with reference to the accompanying drawings and preferred embodiments.

[0020] Example 1: According to an embodiment of this utility model, an end-face toothed disk structure is provided. Please refer to [link / reference]. Figures 1 to 4 It includes a tooth groove end 200 and a tooth tip 100. The tooth groove end 200 has a continuous concave tooth groove 201 that is evenly arranged and covers its end face. The tooth tip 101 has a convex tooth tip 101 that is evenly arranged and does not cover its end face. The convex tooth tip 101 and the concave tooth groove 201 form an asymmetrical interlocking structure.

[0021] It is understandable that the concave tooth grooves 201 are evenly distributed across the entire end face, that is, all the concave tooth grooves 201 are continuously arranged, and combined with the non-full tooth design of the convex tooth tip 101, they form an asymmetrical intermittent meshing.

[0022] Existing end-face gear disc designs feature a one-to-one tooth-to-tooth-groove configuration, forming a symmetrical meshing structure on both sides. This application abandons the traditional symmetrical end-face gear disc design with an equal number of teeth on both sides, and adopts an asymmetrical intermittent meshing structure. This creates space for increasing the size of individual teeth (such as tooth height) and optimizing tooth profile design (such as fillets), while retaining the advantage of balanced force distribution brought about by uniform arrangement. By increasing the tooth height, the contact area of ​​the tooth flanks during meshing can be increased, increasing the ability to resist lateral forces and vibrations. The gear disc locking force is stronger, reducing the risk of micro-movement or separation caused by external forces, and the connection is more stable.

[0023] For an example of an end face toothed disk structure in this embodiment, please refer to [link / reference]. Figures 1 to 4 The bottom of the concave tooth groove 201 and the junction of adjacent concave tooth grooves 201 are all rounded to avoid the tooth tip from having a small flat surface.

[0024] Understandably, the rounded corner design serves as a chamfer and guide surface, making it easier for the convex tooth tip 101 to slide into the concave tooth groove 201, avoiding false locking caused by tooth tip abutting, and ensuring that it can be fully locked only in the correct meshing position.

[0025] For an example of an end face toothed disk structure in this embodiment, please refer to [link / reference]. Figures 1 to 4 The top and root of the convex tooth tip 101 are both rounded.

[0026] Understandably, the rounded corner at the top of the tooth guides the convex tooth tip 101 to slide into the concave tooth groove 201, reducing damage from violent assembly. The rounded corner at the root of the tooth disperses stress concentration, suppresses fatigue cracks, and extends service life.

[0027] Furthermore, the root fillets of adjacent convex tooth tips 101 are connected by continuous curved surfaces to avoid right angles or planar transitions.

[0028] For an example of an end face toothed disk structure in this embodiment, please refer to [link / reference]. Figures 1 to 3 The included angle α of the convex tooth tip 101 is N times the included angle β of the concave tooth groove 201, where N≥1.

[0029] It is understandable that when N=1, α=β, the convex tooth tip 101 and the concave tooth groove 201 are perfectly matched. When N>1, α>β, during meshing, the convex tooth tip 101 wedges into the concave tooth groove 201 and fits against its sidewall, generating radial expansion force and increasing the contact pressure of the tooth groove wall.

[0030] Preferably, when N=2, α=2β, the wider convex tooth tip 101 is easier to slide into the narrower concave tooth groove 201, reducing the difficulty of alignment.

[0031] For an example of an end face toothed disk structure in this embodiment, please refer to [link / reference]. Figure 1 and Figure 4 The bottom of the concave tooth groove 201 is provided with a groove 202. When the convex tooth tip 101 is wedged into the concave tooth groove 201, the top of the convex tooth tip 101 can fall precisely into and be accommodated in the groove 202, so as to ensure that the convex tooth tip 101 is completely inserted into the concave tooth groove 201. The groove 202, based on the bottom rounded corner, further provides functional accommodation space and precise guidance.

[0032] For an example of an end face toothed disk structure in this embodiment, please refer to [link / reference]. Figures 1 to 4 The number of concave tooth grooves 201 is greater than the number of convex tooth tips 101. Adjacent convex tooth tips 101 are distributed according to a rule of n intervals of concave tooth grooves 201, where n≥1 and n is an integer.

[0033] It is understandable that the convex tooth tip 101 does not correspond one-to-one with all the concave tooth grooves 201, but skips some of the concave tooth grooves 201 at fixed intervals, that is, the convex tooth tip 101 only meshes with some of the concave tooth grooves 201.

[0034] Preferably, the convex tooth tips 101 are distributed with one concave tooth groove 201 spaced apart, that is, convex tooth tip A → concave tooth groove a, skipping concave tooth groove b → convex tooth tip B.

[0035] Example 2: According to an embodiment of this utility model, a tracker connection device is provided. Please refer to [link / reference]. Figures 1 to 8 It includes a first connector 300 and a second connector 400, which are connected by the end face toothed disk structure 900.

[0036] It is understandable that the end face toothed disc structure 900 is located at the contact end face between the first connector 300 and the second connector 400. Specifically, the tooth groove end 200 can be set on the first connector 300 or the second connector 400. Correspondingly, the tooth tip 100 can be set on the second connector 400 or the first connector 300. That is to say, the positions of the tooth tip 100 and the tooth groove end 200 are interchangeable.

[0037] Furthermore, the first connector 300 is connected to the bone pin connector via a connecting rod. The first connector 300 includes two cover plates, one end of which is rotatably connected to a rotating shaft. The sides of the two cover plates have polygonal connecting holes 301 that match the shape of the connecting rod. The angle of the bone pin connector is adjusted through the polygonal connecting holes 301 and the polygonal connecting rod. The second connector 400 is connected to the tracker via a tracker mounting bracket 800. In some other embodiments, the first connector 300 is used to connect to the tracker, and the second connector 400 is used to connect to the bone pin connector.

[0038] For a tracker connection device in this embodiment, please refer to [link / reference]. Figures 1 to 8 It also includes a fixing member 500, which passes through the first connecting member 300, the end face toothed disc structure 900 and the second connecting member 400 in sequence, and is locked.

[0039] Furthermore, the fixing member 500 is a locking screw with an external thread on its shank, the second connecting member 400 is provided with an internal thread hole that matches the external thread, the first connecting member 300 is provided with a central hole through which the locking screw passes, and a locking member is provided at the end of the second connecting member 400 away from the first connecting member 300.

[0040] In use, align the first connector 300 and the second connector 400 at the required meshing angle, so that the convex tooth tip 101 is embedded in the concave tooth groove 201, forming a stable end face toothed disc meshing. Pass the shank of the locking screw through the central hole of the first connector 300 and continue to screw it into the internal thread hole of the second connector 400. Begin rotating the locking screw, so that its threaded portion gradually screws into the internal thread hole, generating an initial axial clamping force. Continue rotating the locking screw to increase the axial clamping force. The end of the locking screw shank passes through the locking member and generates radial expansion. The expanded end of the shank forms greater friction with the inner wall of the hole of the locking member, achieving locking. Through the cooperation of the first connector 300, the second connector 400, and the end face toothed disc structure 900, combined with the locking of the fixing member 500, an integral rigid connection is formed, ensuring that the relative position between the bone pin connector and the tracker is fixed, avoiding the risk of tracker loosening due to improper connection during surgery.

[0041] It is understandable that when the fastener 500 passes through the second connector 400, the end face gear structure 900 and the first connector 300 in sequence, the first connector 300 is provided with an internal thread hole that matches the external thread.

[0042] For a tracker connection device in this embodiment, please refer to [link / reference]. Figures 1 to 8A first elastic element 600 is provided between the fixing member 500 and the first connecting member 300, and a second elastic element 700 is provided between the fixing member 500 and the second connecting member 400.

[0043] Understandably, when adjustment or disassembly is required, the user only needs to loosen the fastener 500 (without completely removing it). The elastic force of the first elastic element 600 and the second elastic element 700 will push or pull the first connector 300 and the second connector 400, ensuring that the end faces of the two always maintain slight contact. The relative position of the first connector 300 and the second connector 400 can be easily rotated and changed without complete disassembly to select a new engagement angle. The adjustment process is more intuitive and faster.

[0044] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0045] Optionally, specific examples in this embodiment can refer to the examples described in the above embodiments, and will not be repeated here.

[0046] The sequence numbers of the embodiments in this application are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0047] In the above embodiments of this application, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0048] The above description is only a preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A toothed disc structure with an end face, characterized in that, It includes a tooth groove end and a tooth tip. The tooth groove end has a continuous concave tooth groove that is evenly arranged and covers its end face. The tooth tip has a convex tooth tip that is evenly arranged and does not cover its end face. The convex tooth tip and the concave tooth groove form an asymmetrical intermittent meshing structure.

2. The end face toothed disk structure according to claim 1, characterized in that, The bottom of the concave tooth groove and the junction of adjacent concave tooth grooves are both rounded.

3. The end face toothed disk structure according to claim 1, characterized in that, The top and root of the convex tooth tip are both rounded.

4. The end face toothed disk structure according to claim 3, characterized in that, The root fillets of adjacent convex tooth tips are connected by continuous curved surfaces.

5. The end face toothed disk structure according to claim 1, characterized in that, The included angle of the convex tooth tip is N times the included angle of the concave tooth groove, where N≥1.

6. The end face toothed disk structure according to claim 2, characterized in that, The bottom of the concave tooth groove is provided with a groove.

7. The end face toothed disk structure according to claim 1, characterized in that, The number of concave tooth grooves is greater than the number of convex tooth tips. Adjacent convex tooth tips are distributed with n concave tooth grooves spaced apart, where n≥1 and n is an integer.

8. A tracker connection device, characterized in that, It includes two connectors, which are respectively connected to the bone needle connector and the tracker, and the two connectors are connected by the end face toothed disc structure as described in any one of claims 1-7.

9. The tracker connection device according to claim 8, characterized in that, It also includes a fixing member that passes through the two connecting members and the end face toothed disc structure in sequence. The fixing member is provided with an external thread, and one of the connecting members is provided with an internal thread hole that matches the external thread.

10. The tracker connection device according to claim 9, characterized in that, An elastic element is provided between the fixing member and the two connecting members.

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