Quick inserting device for grinding head and grinding drill handle

Abstract

The utility model relates to a grinding head quick inserting device and a grinding drill handle, and belongs to the technical field of medical instruments. The abrasive drill handle comprises a power input assembly and a grinding head rapid insertion device, the grinding head rapid insertion device comprises a connecting cylinder, an output shaft, a push sleeve, a sliding sleeve and a ball, the push sleeve is slidably arranged in the connecting cylinder, the output shaft is slidably sleeved with the sliding sleeve, and the ball is movably arranged on the side wall of the output shaft. And the grinding head quick insertion device has a mounting state in which the push sleeve pushes the sliding sleeve and enables the sliding sleeve to loosen the balls, and a working state in which the push sleeve and the sliding sleeve are reset and separated and the inner side of the sliding sleeve abuts against the balls. According to the grinding head quick inserting device and the grinding drill handle, the grinding head is not prone to failure due to high-frequency vibration in the high-speed rotating process; meanwhile, as the push sleeve is separated from the sliding sleeve, the push sleeve does not increase frictional resistance to the sliding sleeve, and the rotation of the output shaft is smoother.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical equipment, and in particular relates to a grinding head quick plug-in device and a grinding drill handle. Background Art

[0002] Drill handles are widely used in otolaryngology, orthopedics, and neurosurgery for grinding and trimming bone tissue. Drill handles have the function of quickly plugging and unplugging the grinding head, and the locking state of the grinding head must be stable and effective. The drilling speed of the drill handle is very high, and it has high-frequency vibration. Therefore, a mechanism must be set to effectively ensure that the locking position of the drill handle will not fail under high-frequency vibration to avoid accidents. Utility Model Content

[0003] In view of this, the purpose of the embodiment of the utility model is to provide a grinding head quick plug-in device and a grinding drill handle, wherein the push sleeve can push the sliding sleeve to slide, so that the sliding sleeve locks or unlocks the ball, which is convenient for installing the grinding head. In the working state, the push sleeve is disengaged from the sliding sleeve, and the sliding sleeve locks the ball. During the high-speed rotation of the grinding head, it is not easy to fail due to high-frequency vibration. At the same time, since the push sleeve is disengaged from the sliding sleeve, the push sleeve will not increase the friction resistance to the sliding sleeve, and the rotation of the output shaft is smoother.

[0004] The embodiment of the utility model is achieved as follows:

[0005] The present invention provides a quick plug-in device for a grinding head, comprising:

[0006] The connecting cylinder has a push sleeve inside which is slidable along the axial direction.

[0007] The output shaft has an outer sleeve which is slidable in the axial direction and a side wall which is provided with a movable ball. The ball is configured to roll with the annular groove at the rear end of the grinding head inserted into the output shaft.

[0008] The grinding head quick plug-in device has an installation state in which the push sleeve pushes the sliding sleeve and causes the sliding sleeve to release the ball, and a working state in which the push sleeve is reset and disengaged from the sliding sleeve and the inner side of the sliding sleeve abuts against the ball.

[0009] As an optional solution of the above embodiment, the grinding head quick plug-in device also includes a first spring for pushing the push sleeve to reset and a second spring for pushing the sliding sleeve to reset, and the movable range of the push sleeve is larger than the movable range of the sliding sleeve.

[0010] As an optional solution of the above embodiment, the grinding head quick plug-in device also includes a slip ring, which is slidably mounted on the connecting tube, and the slip ring is connected to the push sleeve via a connecting piece.

[0011] As an optional solution of the above embodiment, the grinding head quick plug-in device also includes a locking sleeve, which is slidably mounted on the connecting tube and is used to directly or indirectly push the pushing sleeve.

[0012] As an optional solution of the above embodiment, the sliding sleeve is inserted into the pushing sleeve and an abutting protrusion is provided at one end, and the pushing sleeve can abut the abutting protrusion and push the sliding sleeve to slide.

[0013] As an optional scheme of the above embodiment, at least three radial limiting holes are distributed on the circumference of the output shaft, the ball can be movably embedded in the limiting hole, the inner end of the limiting hole is provided with a closing end, and the inner surface of the sliding sleeve is provided with an annular groove for the ball to move.

[0014] As an optional solution of the above embodiment, the output shaft and the connecting cylinder are connected via at least two first bearings.

[0015] As an optional solution of the above embodiment, the grinding head quick plug-in device also includes a support tube, which is directly or indirectly connected to the front end of the connecting tube, and at least one second bearing is arranged on the inner side of the support tube.

[0016] As an optional solution of the above embodiment, the support tube and the connecting tube are connected via an adapter, the adapter and the connecting tube are connected via threads, and the adapter and the support tube are connected via threads.

[0017] As an optional solution of the above embodiment, a positioning block is arranged in the output shaft, and a straight groove matching the grinding head is arranged on the positioning block.

[0018] As an optional solution of the above embodiment, the transmission shaft is stepped, both ends of the bearing are respectively limited by a detachable clamping ring or a shaft shoulder, and the front end of the sleeve is limited by a detachable clamping ring.

[0019] The embodiment of the utility model also provides a drill grinding handle, comprising a power input assembly and the above-mentioned grinding head quick plug-in device, wherein the power input assembly is arranged at the rear end of the grinding head quick plug-in device and the two are transmission-connected.

[0020] The beneficial effects of the utility model are:

[0021] The utility model provides a grinding head quick plug-in device and a grinding drill handle. The push sleeve can push the sliding sleeve to move along the axial direction of the output shaft, so that the sliding sleeve can loosen the ball, and the ball can be pushed open by the rear end of the grinding head to facilitate the insertion of the grinding head, which is convenient for installation. In the working state, the sliding sleeve can limit the position of the ball, and the grinding head is not easy to fail due to high-frequency vibration during high-speed rotation. At the same time, since the push sleeve is separated from the sliding sleeve, the push sleeve will not increase the friction resistance of the sliding sleeve, and the rotation of the output shaft is smoother. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can also be obtained based on these drawings without creative work. As shown in the drawings, the above and other purposes, features and advantages of the utility model will be clearer. The same reference numerals in all the drawings indicate the same parts. The drawings are not deliberately scaled according to the actual size, and the focus is on showing the main purpose of the utility model.

[0023] Figure 1 A schematic diagram of the structure of a drill handle provided by an embodiment of the utility model;

[0024] Figure 2 A schematic diagram of the structure of a grinding head quick plug-in device provided in an embodiment of the utility model;

[0025] Figure 3 for Figure 1 A partial enlarged schematic diagram of part A;

[0026] Figure 4 for Figure 2 A partial enlarged schematic diagram of part B;

[0027] Figure 5 for Figure 2 A partial enlarged schematic diagram of part C of FIG.

[0028] icon:

[0029] 10-drill handle; 20-grinding head;

[0030] 11-power input assembly; 12-grinding head quick plug-in device;

[0031] 110-housing; 111-input shaft;

[0032] 120-connecting cylinder; 121-pushing sleeve; 122-slip ring; 123-locking sleeve; 124-first spring; 125-connecting piece;

[0033] 130-output shaft; 131-sliding sleeve; 132-second spring; 133-first bearing; 134-ball; 135-abutting protrusion; 136-annular groove; 137-retaining ring; 138-positioning block;

[0034] 140 - support tube; 141 - adapter; 142 - second bearing. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0036] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0038] Furthermore, the terms “first”, “second”, etc. are merely used for distinguishing descriptions and are not to be understood as indicating or implying relative importance.

[0039] Please refer to Figure 1 As shown, an embodiment of the utility model provides a grinding drill handle 10, which is mainly used in the field of minimally invasive surgery, especially in the fields of otolaryngology, orthopedics, etc., for high-speed grinding of bone tissue.

[0040] The drill handle 10 can be plugged into the grinding head 20 and drive the grinding head 20 to rotate at high speed. The structure of the grinding head 20 can refer to the existing technology. The grinding head 20 includes a head and a rod. The head is spherical and fixed to the front end of the rod. The rear end of the rod is provided with a connecting part, which can be a straight line shape. The rear end of the rod is circumferentially provided with an annular groove. The cross-section of the annular groove is not limited and can be an arc shape, etc.

[0041] It should be noted that the front and back mentioned in this embodiment are defined based on the distance from the lesion site during actual use, that is, the front is close to the lesion site and the back is far from the lesion site.

[0042] The drill handle 10 is mainly composed of a power input component 11 and a grinding head quick plug-in device 12. The power input component 11 is arranged at the rear end of the grinding head quick plug-in device 12, and the two are transmission connected. The power input component 11 can provide power for the grinding head quick plug-in device 12, and the grinding head quick plug-in device 12 is used to plug in the grinding head 20 and drive the grinding head 20 to rotate at high speed.

[0043] In this embodiment, the drill bit handle 10 can be a bent handle, which is bent at the connection portion between the power input assembly 11 and the grinding head quick plug-in device 12 .

[0044] The structure of the power input assembly 11 is not limited and can refer to the existing technology. It is mainly composed of a shell 110, a power motor (not shown in the figure), and an input shaft 111. The power motor is arranged at the rear end of the shell 110 and the cable extends from the rear end of the shell 110. The input shaft 111 is rotatably arranged in the shell 110 through a bearing. The rear end of the input shaft 111 is transmission-connected to the output end of the power motor, and the front end of the input shaft 111 may be provided with transmission teeth.

[0045] Please refer to Figure 2-Figure 4 As shown, the specific structure of the grinding head quick plug-in device 12 is as follows: the grinding head quick plug-in device 12 includes a connecting tube 120, a push sleeve 121, a slip ring 122, a sliding sleeve 131, a locking sleeve 123, an output shaft 130, a sliding sleeve 131, etc.

[0046] The connecting tube 120 is cylindrical, and its inner and outer sides may be stepped shafts and stepped holes. The rear end of the connecting tube 120 is connected to the outer shell 110 of the power input assembly 11, and the connection method is not limited, such as welding, clamping, threaded connection, etc.

[0047] The push sleeve 121 is disposed on the inner side of the connecting tube 120 . The push sleeve 121 is annular. The push sleeve 121 and the connecting tube 120 may be coaxial. Moreover, the push sleeve 121 may slide along the axial direction of the connecting tube 120 .

[0048] The slip ring 122 is sleeved on the outer side of the connecting tube 120 . The slip ring 122 is annular. The slip ring 122 and the connecting tube 120 may be coaxial, and the slip ring 122 may slide along the axial direction of the connecting tube 120 .

[0049] The push sleeve 121 and the slip ring 122 are connected and slide synchronously, and the connection method can be but not limited to the following schemes: a strip through hole is provided on the side wall of the connecting tube 120, and the strip through hole extends along the axial direction of the connecting tube 120. A connecting member 125 is passed through the strip through hole. The connecting member 125 can slide in the strip hole along the axial direction of the connecting tube 120 but cannot rotate around the center line of the connecting tube 120. The two ends of the connecting member 125 are respectively connected to the push sleeve 121 and the slip ring 122.

[0050] The type and connection method of the connecting member 125 are not limited. For example, the connecting member 125 is a pin or a bolt, and the two ends of the connecting member 125 are respectively interference fit with the push sleeve 121 and the slip ring 122. In this embodiment, the connecting member 125 is a screw, a through hole is provided on the slip ring 122, and a threaded hole is provided on the push sleeve 121. The connecting member 125 passes through the through hole and the strip through hole and is threadedly engaged with the threaded hole.

[0051] Such an arrangement enables the push sleeve 121 and the slip ring 122 to slide synchronously, and the push sleeve 121 on the inner side of the connecting tube 120 can be driven to slide by controlling the slip ring 122 on the outer side of the connecting tube 120 , and the control method is simple and reliable.

[0052] The locking sleeve 123 is sleeved on the outer side of the connecting tube 120. The locking sleeve 123 can slide along the axial direction of the connecting tube 120. The slip ring 122 can be located on the inner side of the locking sleeve 123. An annular protrusion can be provided on the inner side of the locking sleeve 123. The annular protrusion can abut against one end of the slip ring 122 or be embedded in the slip ring 122. The slip ring 122 is in a relatively closed space and is not easily affected by external interference. The structure is more stable.

[0053] The outer surface of the lock sleeve 123 may be provided with anti-skid stripes or the like to increase the friction during rotation and make the operation smoother.

[0054] In this embodiment, the locking sleeve 123 indirectly pushes the push sleeve 121 to slide through the slip ring 122, etc. In other embodiments, the locking sleeve 123 can also directly push the push sleeve 121 to slide. For example, a rod-shaped protrusion is provided on the inner side of the locking sleeve 123, and the rod-shaped protrusion passes through the bar-shaped through hole and is directly connected to the push sleeve 121, and the two can move synchronously.

[0055] The output shaft 130 is rotatably disposed inside the connecting tube 120 . The output shaft 130 and the connecting tube 120 are connected via at least two first bearings 133 . In this embodiment, both ends of the output shaft 130 are connected to the connecting tube 120 via the first bearings 133 .

[0056] The outer side of the output shaft 130 can be in the shape of a stepped shaft, and a plurality of annular clamping grooves can be arranged on the outer surface of the output shaft 130. The clamping grooves are arranged along the axial direction of the output shaft 130, and a clamping ring 137 is embedded in the clamping groove. Both sides of the inner ring of the first bearing 133 can be limited by the clamping ring 137, or one side of the inner ring of the first bearing 133 is limited by the clamping ring 137 and the other end is limited by the shoulder of the stepped shaft.

[0057] The clamping ring 137 can be disassembled and can be quickly disassembled under the effect of limiting, so the installation and disassembly are relatively simple, saving time and effort.

[0058] The rear end of the output shaft 130 can be connected to the front end of the input shaft 111 by gear transmission, etc. The interior of the output shaft 130 is hollow, so the rear end of the grinding head 20 can be inserted. A guide portion with a gradually decreasing inner diameter can be provided at the front end of the output shaft 130.

[0059] Limiting holes are provided on the side wall of the output shaft 130 , and the number of the limiting holes is not limited. For example, three limiting holes are provided on the side wall of the output shaft 130 , and the three limiting holes are evenly distributed along the circumference of the output shaft 130 .

[0060] The limiting hole extends along the radial direction of the output shaft 130 , that is, the axial direction of the limiting hole is the radial direction of the output shaft 130 . The limiting hole passes through the side wall of the output shaft 130 and is used to connect the inner and outer sections of the output shaft 130 .

[0061] A ball 134 is arranged in the limiting hole, and the ball 134 can move along the limiting hole. There are two kinds of movement modes, namely, the ball 134 can rotate around its own spherical center, and the ball 134 can move along the axial direction of the limiting hole.

[0062] The ball bearing 134 can be a steel ball or the like. The ball bearing 134 can extend into the interior of the output shaft 130 and be embedded in the annular groove at the rear end of the grinding head 20 to limit the axial movement of the grinding head 20 .

[0063] A positioning block 138 is provided inside the output shaft 130 . The positioning block 138 is provided with a straight groove. The connecting portion at the rear end of the grinding head 20 can be embedded in the straight groove to limit the rotation of the grinding head 20 relative to the output shaft 130 , so that the output shaft 130 can drive the grinding head 20 to rotate.

[0064] When the ball 134 can only roll, the grinding head 20 cannot be inserted or pulled out; when the ball 134 can move along the axial direction of the limiting hole, the two sides of the annular groove can push the ball 134 open, so that the ball 134 enters the annular groove and is fixed, or the ball 134 is detached from the annular groove and the grinding head 20 is disassembled.

[0065] In order to prevent the grinding head 20 from moving abnormally (preventing the grinding head 20 from entering the interior of the output shaft 130 from the inner end of the limiting hole), the limiting hole can be provided with a closing opening, and the form of the closing opening is not limited. For example, the limiting hole is in the form of a stepped hole, and the diameter of the portion close to the center line of the output shaft 130 is smaller than the diameter of the portion close to the center line of the original output shaft 130, or a spherical closing opening is provided at the inner end of the limiting hole, and the diameter of the closing opening gradually decreases from the outside to the inside, but it is necessary to ensure that a portion of the ball 134 can enter the interior of the output shaft 130 and be embedded in the annular groove.

[0066] Whether the ball 134 can move along the axial direction of the limiting hole can be controlled by the sliding sleeve 131. The sliding sleeve 131 is annular and sleeved on the output shaft 130. The sliding sleeve 131 can slide along the axial direction of the output shaft 130.

[0067] An annular groove 136 is provided on the inner surface of the sleeve 131. Both sides of the annular groove 136 can be abutment portions. The diameter of the annular groove 136 is larger than the inner diameter of the abutment portion. As the sleeve 131 moves along the output shaft 130, the ball 134 can be respectively opposite to the annular groove 136 and the abutment portion: when the ball 134 abuts against the abutment portion, the ball 134 is limited in the limiting hole and cannot move along the axial direction of the limiting hole, thereby locking the axial movement of the grinding head 20; when the ball 134 is opposite to the annular groove 136, the moving range of the ball 134 is increased, and the ball 134 can move along the axial direction of the limiting hole, that is, the ball 134 can be pushed open by the rod of the grinding head 20, which is convenient for installation and disassembly.

[0068] The sliding of the sleeve 131 is pushed by the push sleeve 121, and the cooperation mode of the two is not limited. In the present embodiment, the sleeve 131 is coaxially arranged with the push sleeve 121, and the sleeve 131 is inserted into the push sleeve 121. The inner diameter of the push sleeve 121 needs to be larger than the outer diameter of the sleeve 131, that is, there is a certain gap between the inner surface of the push sleeve 121 and the outer surface of the sleeve 131.

[0069] An abutment protrusion 135 is provided at one end of the sliding sleeve 131. The outer diameter of the abutment protrusion 135 is larger than the inner diameter of the push sleeve 121. The abutment protrusion 135 can be provided at the front end or the rear end of the sliding sleeve 131, depending on whether the push sleeve 121 is pushed forward or backward to slide the sliding sleeve 131. In the present embodiment, the abutment protrusion 135 is located at the rear end of the sliding sleeve 131. When the push sleeve 121 is pulled backward, the push sleeve 121 can abut against the abutment protrusion 135 and push it backward. The front end of the sliding sleeve 131 can be limited by the clamping ring 137.

[0070] In addition, the push sleeve 121 is reset by the first spring 124, and the sliding sleeve 131 is reset by the second spring 132. Specifically, the first spring 124 is sleeved on the outside of the connecting tube 120, and the first spring 124 is located inside the locking sleeve 123, and the two ends of the first spring 124 are respectively abutted against the shaft shoulder of the connecting tube 120 and the slip ring 122, and the first spring 124 can push the push sleeve 121 to slide forward through the slip ring 122. The second spring 132 is sleeved on the outside of the output shaft 130, and the two ends of the second spring 132 are respectively abutted against the shaft shoulder of the output shaft 130 and the sliding sleeve 131, and the second spring 132 can push the sliding sleeve 131 to slide forward relative to the output shaft 130. At this time, after the locking sleeve 123 is not applied with external force, the first spring 124 pushes the push sleeve 121 to reset forward, and the second spring 132 pushes the sliding sleeve 131 to move forward, so as to achieve the locking of the ball 134, and the locking sleeve 123 needs to be pulled backward to achieve the unlocking of the ball 134.

[0071] In other embodiments, it is also possible that the first spring 124 can push the sliding ring 122 to move backward and the second spring 132 can push the sliding sleeve 131 to move backward. In this case, the locking sleeve 123 needs to be pushed forward to unlock the ball 134.

[0072] In addition, the movable range of the push sleeve 121 needs to be larger than the movable range of the sliding sleeve 131, that is, the axial sliding distance of the push sleeve 121 along the connecting tube 120 is larger than the axial sliding distance of the sliding sleeve 131 along the output shaft 130, so that after the push sleeve 121 and the sliding sleeve 131 are reset, the two can be disengaged from each other, and the push sleeve 121 will not exert frictional resistance on the sliding sleeve 131.

[0073] It should be noted that the "activity range" mentioned here does not refer to the range in which the push sleeve 121 or the sliding sleeve 131 can move, but refers to that when the push sleeve 121 pushes the sliding sleeve 131 to move, since the push sleeve 121 is the active part and the sliding sleeve 131 is the driven part, in the initial state, the push sleeve 121 and the sliding sleeve 131 are out of contact, and only when the push sleeve 121 is pushed backward and slid a certain distance can it contact the sliding sleeve 131 (this distance is the extra activity range), and then the two are always in contact and the movement distance is equal. After the first spring 124 and the second spring 132 push the push sleeve 121 and the sliding sleeve 131 to slide forward a certain distance, the sliding sleeve 131 no longer continues to slide and the push sleeve 121 continues to slide forward, so that the two are out of contact.

[0074] Therefore, in summary, the grinding head quick plug-in device 12 has an installation state and a working state. When the grinding head quick plug-in device 12 is in the installation state, the push sleeve 121 pushes the sliding sleeve 131 to slide backward, and the first spring 124 and the second spring 132 are both compressed (in other embodiments, the first spring 124 and the second spring 132 may be stretched), so that the annular groove 136 of the sliding sleeve 131 is opposite to the ball 134, and the ball 134 is unlocked; when the grinding head quick plug-in device 12 is in the working state, the first spring 124 and the second spring 132 push the push sleeve 121 and the sliding sleeve 131 to reset, and the push sleeve 121 and the sliding sleeve 131 are out of contact, and the push sleeve 121 will not exert friction resistance on the sliding sleeve 131.

[0075] In addition, in order to further prevent the grinding head 20 from vibrating at high frequencies, the following solution may also be adopted: Figure 5 As shown, the grinding head quick plug-in device 12 also includes an adapter 141 and a support cylinder 140 , and the support cylinder 140 is indirectly connected to the connecting cylinder 120 via the adapter 141 .

[0076] The rear end of the adapter 141 is connected to the front end of the connecting tube 120 via a threaded connection, and the front end of the adapter 141 is connected to the rear end of the supporting tube 140 via a threaded connection.

[0077] At least one second bearing 142 is provided on the inner side of the support cylinder 140. After the grinding head 20 is inserted into the input shaft 111, the rod portion of the grinding head 20 can contact the inner ring of the second bearing 142 (or there is a small gap). During the high-speed rotation of the grinding head 20, it is not easy to move radially, thereby effectively ensuring the stability of the grinding head 20.

[0078] The method of using the drill handle 10 provided in this embodiment is as follows:

[0079] Grasp the drill handle 10 and pull the lock sleeve 123 backwards. The lock sleeve 123 pushes the sliding ring 122 and the push sleeve 121 to move backwards, and the first spring 124 is gradually compressed.

[0080] The push sleeve 121 abuts against the abutting protrusion 135 of the sliding sleeve 131;

[0081] The lock sleeve 123 is continuously pulled backward, and the push sleeve 121 pushes the slide sleeve 131 to move backward, and the second spring 132 is gradually compressed;

[0082] The sleeve 131 moves backward until the annular groove 136 is opposite to the ball 134, and the ball 134 is unlocked. At this time, the ball 134 can move along the axial direction of the limiting hole. Please refer to Figure 2 , Figure 4 As shown;

[0083] Insert the rod of the grinding head 20 from the front end of the support tube 140 until the rod enters the output shaft 130;

[0084] The grinding head 20 is further inserted, and the rear end of the grinding head 20 pushes the ball 134 outward, and the connecting portion of the grinding head 20 is inserted into the positioning block 138, and the ball 134 is opposite to the annular groove of the rod;

[0085] Release the lock sleeve 123, the first spring 124 pushes the push sleeve 121, the slip ring 122, the lock sleeve 123, etc. to move forward, and the second spring 132 pushes the slide sleeve 131, the push sleeve 121, the slip ring 122, the lock sleeve 123, etc. to move forward (it can also push only the slide sleeve 131 to move forward);

[0086] The sliding sleeve 131 reaches the front dead point and cannot slide further. At this time, the push sleeve 121, the sliding ring 122, the locking sleeve 123, etc. continue to move forward, and the push sleeve 121 is out of contact with the abutting protrusion 135 of the sliding sleeve 131.

[0087] The push sleeve 121, the slip ring 122, the locking sleeve 123, etc. reach the front dead point and no longer move. Please refer to the installation of the grinding handle 10. Figure 1 , Figure 3 As shown;

[0088] The surgery is performed using the burr handle 10 after the burr head 20 is installed.

[0089] When the grinding head 20 needs to be disassembled, refer to the installation steps, which will not be repeated here.

[0090] The above steps can be added, deleted, modified, or the order can be adjusted as needed.

[0091] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A grinding head quick plug-in device, characterized in that: include: A connecting cylinder (120) having a push sleeve (121) disposed therein and slidable in the axial direction; An output shaft (130), the outer side of which is provided with a sliding sleeve (131) that can slide in the axial direction and the side wall of which is provided with a movable ball (134); the interior of the output shaft (130) is hollow and the rear end of the grinding head can be inserted therein, so that the output shaft (130) can drive the grinding head to rotate; The grinding head quick plug-in device (12) has an installation state in which the push sleeve (121) pushes the sliding sleeve (131) and causes the sliding sleeve (131) to release the ball (134), and a working state in which the push sleeve (121) and the sliding sleeve (131) are reset and disengaged and the inner side of the sliding sleeve (131) abuts against the ball (134); The grinding head quick plug-in device (12) further comprises a first spring (124) for pushing the push sleeve (121) to return to its original position and a second spring (132) for pushing the sliding sleeve (131) to return to its original position to a front dead point, wherein the movable range of the push sleeve (121) is greater than the movable range of the sliding sleeve (131).

2. The grinding head quick plug-in device according to claim 1, characterized in that: The grinding head quick plug-in device (12) further comprises a slip ring (122), wherein the slip ring (122) is slidably sleeved on the connecting tube (120), and the slip ring (122) is connected to the push sleeve (121) via a connecting piece (125).

3. The grinding head quick plug-in device according to claim 1, characterized in that: The grinding head quick plug-in device (12) further comprises a locking sleeve (123), wherein the locking sleeve (123) is slidably sleeved on the connecting tube (120) and is used to directly or indirectly push the pushing sleeve (121).

4. The grinding head quick plug-in device according to claim 1, characterized in that: The sliding sleeve (131) is inserted into the pushing sleeve (121) and is provided with an abutting protrusion (135) at one end; the pushing sleeve (121) can abut against the abutting protrusion (135) and push the sliding sleeve (131) to slide.

5. The grinding head quick plug-in device according to any one of claims 1 to 4, characterized in that: At least three radial limiting holes are distributed in the circumference of the output shaft (130), the balls (134) are movably embedded in the limiting holes, the inner ends of the limiting holes are provided with closing ends, and the inner surface of the sliding sleeve (131) is provided with an annular groove (136) for the balls (134) to move.

6. The grinding head quick plug-in device according to any one of claims 1 to 4, characterized in that: The output shaft (130) and the connecting cylinder (120) are connected via at least two first bearings (133).

7. The grinding head quick plug-in device according to any one of claims 1 to 4, characterized in that: The grinding head quick plug-in device (12) further comprises a support cylinder (140), the support cylinder (140) being directly or indirectly connected to the front end of the connecting cylinder (120), and at least one second bearing (142) being arranged on the inner side of the support cylinder (140).

8. The grinding head quick plug-in device according to any one of claims 1 to 4, characterized in that: A positioning block (138) is arranged inside the output shaft (130), and a slot matching the grinding head (20) is arranged on the positioning block (138).

9. A drill handle, characterized in that: It comprises a power input assembly (11) and a grinding head quick plug-in device (12) according to any one of claims 1 to 8, wherein the power input assembly (11) is arranged at the rear end of the grinding head quick plug-in device (12) and the two are transmission-connected.

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