Multi-stage planetary gear structure suitable for surgical electric anastomat
By designing a multi-stage planetary gear structure, the stability problem of the surgical electric stapler when cutting thick tissue was solved, achieving smooth output and safe use of the stapler, and avoiding motor damage and surgical risks.
Patent Information
- Application Number
- CN202423085108.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-13
- Publication Date
- 2026-02-13
- Estimated Expiration
- 2034-12-13
AI Technical Summary
Existing electric surgical staplers struggle to overcome resistance when cutting thicker tissues, leading to problems such as device vibration, bleeding, and anastomotic leakage. Furthermore, the motor may burn out, affecting surgical outcomes.
It adopts a multi-stage planetary gear structure, including a non-differential planetary gear transmission mechanism and a multi-stage planetary gear transmission. Each stage of gears shares the same fixed internal gear ring. It adopts a factor decomposition-type gear matching design to compensate for system torsional vibration and avoid periodic impacts.
It improves the meshing quality between the planetary gears and the sun gear, ensuring smooth torque output and stable and safe use of the stapler, avoiding motor damage and adverse surgical effects.
Smart Images
Figure CN223900816U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to medical instrument technical field especially a kind of multi-stage planetary gear structure suitable for surgical electric anastomat. BACKGROUND
[0002] Anastomat, such as medical anastomat, is a commonly used medical instrument in clinic, and its application range involves gastrointestinal surgery, hepatobiliary surgery, urological surgery and thoracic surgery fields, and using medical anastomat can reduce operation time, reduce bleeding, and has many advantages such as being beneficial to postoperative functional recovery. With the appearance of laparoscope anastomat, the traditional manual suture method is gradually replaced, which is fast and convenient in clinical operation and has excellent postoperative recovery effect.
[0003] Since different tissues have different thicknesses, the resistance caused by different tissues to the anastomat is different. When cutting and suturing thick tissues using the anastomat, the firing force is difficult to overcome the cutting resistance, the anastomat body shakes to cause bleeding, anastomotic fistula and other problems, which affect the postoperative healing effect of the patient. Even the cutting may not be complete, at this time the load torque exceeds the maximum torque that the motor can provide, and the motor may be burned and the anastomat may be damaged, which may adversely affect the operation. Therefore, we propose a multi-stage planetary gear structure suitable for surgical electric anastomat to solve the above problems. SUMMARY
[0004] The utility model aims at providing a multi-stage planetary gear structure suitable for surgical electric anastomat to solve the problems proposed in the above background.
[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:
[0006] A multi-stage planetary gear structure suitable for surgical electric anastomat, comprising an anastomat main body, a non-differential planetary gear transmission mechanism is installed inside the anastomat main body, the non-differential planetary gear transmission mechanism comprises a first-stage planetary gear transmission mechanism, a second-stage planetary gear transmission mechanism, a third-stage planetary gear transmission mechanism and a fourth-stage planetary gear transmission mechanism.
[0007] In further embodiments, the non-differential planetary gear transmission mechanism is coupled by multi-stage simple planetary gear transmission.
[0008] In further embodiments, the sun gear and the planet carrier in each stage of the multi-stage planetary gear transmission are non-fixed elements.
[0009] In further embodiments, the first-stage planetary gear transmission mechanism, the second-stage planetary gear transmission mechanism, the third-stage planetary gear transmission mechanism and the fourth-stage planetary gear transmission mechanism all share the same fixed inner ring gear element.
[0010] In further embodiments, the first, second and third planetary gear mechanisms are assembled with factorial split gearing.
[0011] In further embodiments, the fourth planetary gear mechanism is assembled with non-factorial split gearing.
[0012] In further embodiments, the gap Δg between the outer diameters of adjacent planets of the first planetary gear mechanism is 2.63mm 2 .
[0013] In further embodiments, the gap Δg between the outer diameters of adjacent planets of the second planetary gear mechanism is 2.63mm 2 .
[0014] In further embodiments, the gap Δg between the outer diameters of adjacent planets of the third planetary gear mechanism is 2.63mm 2 .
[0015] In further embodiments, the gap Δg between the outer diameters of adjacent planets of the fourth planetary gear mechanism is 0.925mm 2 .
[0016] Compared with the prior art, the utility model has the advantages of:
[0017] The device is provided with non-differential planetary gear mechanisms, first, second, third and fourth planetary gear mechanisms, and the sun gears and planet carriers in each level of the multi-stage planetary gear transmission are non-fixed elements, the first, second, third and fourth planetary gear mechanisms share the same fixed inner ring gear element, the fourth planetary gear mechanism is assembled with non-factorial split gearing, the torque variation is 1 / 4 of the factorial split gearing, and the frequency is 4 times, which is favorable for improving the meshing quality between the planets and the sun gears, compensating the torsional vibration of the system, effectively avoiding periodic impact, stably outputting torque, and facilitating the stable and safe use of the main machine of the anastomat. BRIEF DESCRIPTION OF DRAWINGS
[0018] Figure 1 It is a whole three-dimensional structure schematic view of the multi-stage planetary gear structure suitable for the electric anastomat for surgical operation.
[0019] Figure 2 It is an explosion structure schematic view of the main machine of the anastomat in the multi-stage planetary gear structure suitable for the electric anastomat for surgical operation.
[0020] Figure 3 It is a rear view of the main machine of the anastomat in the multi-stage planetary gear structure suitable for the electric anastomat for surgical operation.
[0021] Figure 4 Figure 4 is a cross-sectional view of a rear view of the anastomat main machine in a multi-stage planetary gear structure suitable for a surgical electric anastomat.
[0022] Figure 5 Figure 5 is a cross-sectional view of a rear view of the anastomat main machine in a multi-stage planetary gear structure suitable for a surgical electric anastomat. Figure 4 Figure 6 is a partially enlarged structural schematic view of the anastomat main machine in a multi-stage planetary gear structure suitable for a surgical electric anastomat.
[0023] Figure 6 Figure 7 is a bottom view of the anastomat main machine in a multi-stage planetary gear structure suitable for a surgical electric anastomat.
[0024] Figure 7 Figure 8 is a three-dimensional structural schematic view of a non-differential planetary gear transmission mechanism in a multi-stage planetary gear structure suitable for a surgical electric anastomat.
[0025] In the figure: 1, anastomat main machine; 2, non-differential planetary gear transmission mechanism; 21, first-stage planetary gear transmission mechanism; 22, second-stage planetary gear transmission mechanism; 23, third-stage planetary gear transmission mechanism; 24, fourth-stage planetary gear transmission mechanism. DETAILED DESCRIPTION
[0026] In the description of the present application, it is to be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second" and the like are only for the purpose of description and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features limited by "first", "second" and the like can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.
[0027] In the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication between two elements inside. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0028] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the utility model.
[0029] Please refer to Figures 1-7 In the utility model, a kind of multi-stage planetary gear structure suitable for surgical electric anastomat, including anastomat main machine 1, non-differential planetary gear transmission mechanism 2 is installed in the inside of anastomat main machine 1, non-differential planetary gear transmission mechanism 2 includes first-stage planetary gear transmission mechanism 21, second-stage planetary gear transmission mechanism 22, third-stage planetary gear transmission mechanism 23 and fourth-stage planetary gear transmission mechanism 24.
[0030] Non-differential planetary gear transmission mechanism 2 of the utility model is coupled by multi-stage simple planetary gear transmission, sun gear, planet carrier in each stage in multi-stage planetary gear transmission are all non-fixed elements, first-stage planetary gear transmission mechanism 21, second-stage planetary gear transmission mechanism 22, third-stage planetary gear transmission mechanism 23 and fourth-stage planetary gear transmission mechanism 24 all share same fixed inner ring gear element, which can improve the quality of meshing between planetary gear and sun gear.
[0031] First-stage planetary gear transmission mechanism 21, second-stage planetary gear transmission mechanism 22 and third-stage planetary gear transmission mechanism 23 are assembled with factor decomposition type tooth matching, and fourth-stage planetary gear transmission mechanism 24 is assembled with non-factor decomposition type tooth matching, which can compensate system torsional vibration, and facilitate anastomat main machine 1 to output torque smoothly.
[0032] The gap Δg between the outer diameters of adjacent planetary gears of first-stage planetary gear transmission mechanism 21 is 2.63mm 2 The gap Δg between the outer diameters of adjacent planetary gears of second-stage planetary gear transmission mechanism 22 is 2.63mm 2 The gap Δg between the outer diameters of adjacent planetary gears of third-stage planetary gear transmission mechanism 23 is 2.63mm 2 The gap Δg between the outer diameters of adjacent planetary gears of fourth-stage planetary gear transmission mechanism 24 is 0.925mm 2 , which can compensate system torsional vibration, avoid periodic impact, and facilitate smooth torque output.
[0033] The working principle of the utility model is:
[0034] When the anastomat main machine 1 is used for suturing, the sun gear and the planet carrier in each stage of the multi-stage planetary gear transmission are non-fixed elements, the first-stage, second-stage, third-stage and fourth-stage planetary gear transmission units all share the same fixed inner ring element, the fourth-stage planetary gear transmission assembly is a non-factor decomposition type gear, the torque variation is 1 / 4 of the factor decomposition type gear, the frequency is 4 times, the engagement quality between the planetary gear and the sun gear can be improved, the system torsional vibration can be compensated, the periodic impact can be avoided, the anastomat main machine 1 can stably output torque, and stable and safe suturing use of the anastomat main machine 1 is realized.
[0035] It is apparent for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, but can be implemented in other concrete forms without departing from the spirit or essential characteristics of the present application. Accordingly, no matter from which point of view, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and range of the equivalent elements of the claims are intended to be embraced in the present application. Any reference signs in the claims should not be regarded as limiting the claims to which they relate.
[0036] In addition, it should be understood that, although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the specification is described in this way only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that those skilled in the art can understand.
Claims
1. A multi-stage planetary gear structure suitable for use in a surgical electric anastomat, characterized by: The application relates to an anastomat main body machine (1), wherein a non-differential planetary gear transmission mechanism (2) is internally installed in the anastomat main body machine (1), and the non-differential planetary gear transmission mechanism (2) comprises a first-stage planetary gear transmission mechanism (21), a second-stage planetary gear transmission mechanism (22), a third-stage planetary gear transmission mechanism (23) and a fourth-stage planetary gear transmission mechanism (24).
2. The multi-stage planetary gear structure for use in a surgical electric anastomat according to claim 1, characterized in that: The non-differential planetary gear transmission mechanism (2) is coupled by multiple-stage simple planetary gear transmission.
3. A multi-stage planetary gear structure suitable for use in a surgical electric anastomat according to claim 1 or 2, characterized in that: The sun gears and the planet carriers in each stage of the multiple-stage planetary gear transmission are non-fixed elements.
4. The multi-stage planetary gear structure for use in a surgical electric anastomat according to claim 1, characterized in that: The first-stage planetary gear transmission mechanism (21), the second-stage planetary gear transmission mechanism (22), the third-stage planetary gear transmission mechanism (23) and the fourth-stage planetary gear transmission mechanism (24) all share the same fixed inner ring gear element.
5. The multi-stage planetary gear structure for use in a surgical electric anastomat according to claim 1, characterized in that: The first-stage planetary gear transmission mechanism (21), the second-stage planetary gear transmission mechanism (22) and the third-stage planetary gear transmission mechanism (23) are assembled by factor decomposition type tooth matching.
6. The multi-stage planetary gear structure for use in a surgical electric anastomat according to claim 1, characterized in that: The fourth-stage planetary gear transmission mechanism (24) is assembled by non-factor decomposition type tooth matching.
7. The multi-stage planetary gear structure for use in a surgical electric anastomat according to claim 1, characterized in that: The gap Ag between the outer diameters of the adjacent planet gears of the primary planetary gear mechanism (21) is 2.63 mm 2 .
8. The multi-stage planetary gear structure for use in a surgical electric anastomat according to claim 1, characterized by: The gap Ag between the outer diameters of the adjacent planet wheels of the secondary planetary gear mechanism (22) is 2.63 mm 2 .
9. The multi-stage planetary gear structure for use in a surgical electric anastomat according to claim 1, characterized in that: The gap Ag between the outer diameters of the adjacent planet gears of the three-stage planetary gear mechanism (23) is 2.63 mm 2 .
10. The multi-stage planetary gear structure for use in a surgical electric anastomat according to claim 1, characterized in that: The gap Ag between the outer diameters of the adjacent planet gears of the fourth stage planetary gear mechanism (24) is 0.925 mm 2 .