External stirring driving device for bone cement mixing

Abstract

The utility model relates to the technical field of bone cement mixing, in particular to an external stirring driving device for bone cement mixing, the external stirring driving device and a bone cement mixing cylinder are of a split structure, the external stirring driving device can be used by general components, and the manufacturing cost and the use cost of the bone cement mixing cylinder are greatly reduced; when bone cement mixing needs to be carried out, the cylinder body of the bone cement mixing cylinder is inserted into the inserting groove, and positioning is completed by rotating the cylinder body; then a driving motor can drive a driving face gear to rotate through a transmission transverse shaft, an umbrella-shaped steering gear set, a driven vertical shaft and a sleeve, the driving face gear automatically moves downwards under the abutting pressure of a driven face gear, and the driving face gear and the driven face gear can automatically move upwards under the supporting effect of a compression spring after being clamped with each other; at the moment, the driving face gear can drive the driven face gear to synchronously rotate along with the driving face gear, and the rapid stirring requirement of the bone cement mixing barrel can be met in this way.

Description

Technical Field

[0001] The utility model relates to the technical field of bone cement mixing, in particular to an external stirring driving device for bone cement mixing. Background Art

[0002] PMMA bone cement is a room temperature curing polymer material, usually provided as a set of two components, liquid and powder. The liquid is methyl methacrylate monomer, which is colorless and transparent, with a certain volatility and pungent odor. The liquid and powder need to be mixed before use during surgery. The mixed liquid and powder undergo a polymerization reaction, which produces a highly fluid, low-viscosity mass. Over time, the viscosity of the mass gradually increases until it reaches the dough stage, and finally hardens completely into a hard mass. In order to prevent bone cement from releasing irritating gases during the mixing process, existing bone cement mixing devices generally adopt a closed structure.

[0003] The patent specification with publication number CN214915442U discloses a bone cement mixing device, including a mixing barrel, an end cover, an outer rotating barrel and a stirring blade; an end cover is provided at one end of the mixing barrel, and a stirring inlet is provided at the other end of the mixing barrel; the outer rotating barrel is sleeved on the outside of the mixing barrel, and the axis of the outer rotating barrel coincides with the axis of the mixing barrel; the stirring blade is built into the mixing barrel, and the stirring blade passes through the stirring inlet and is connected to the outer rotating barrel; the outer rotating barrel can rotate relative to the mixing barrel around its own axis. The outer rotating barrel can drive the stirring blade to rotate in the mixing barrel to complete the mixing of the bone cement components; and the end cover is located at one end of the mixing barrel for placing the bone cement components and also for exporting the bone cement. The overall structure of the bone cement mixing device is simplified and the operation is simple, which greatly improves the mixing efficiency of the bone cement.

[0004] This bone cement mixing device integrates the stirring drive part on the bone cement mixing cylinder, resulting in high cost of manufacture and use of the bone cement mixing cylinder, which is not conducive to popularization and use. Based on this, the inventor hopes to design an external stirring drive device for bone cement mixing, which is a separate structure from the bone cement mixing cylinder and can be used as a universal component, greatly reducing the cost of manufacture and use of the bone cement mixing cylinder. Utility Model Content

[0005] The purpose of the utility model is to overcome the above problems existing in the traditional technology and provide an external stirring drive device for mixing bone cement.

[0006] In order to achieve the above technical objectives and the above technical effects, the present invention is implemented through the following technical solutions:

[0007] An external stirring drive device for bone cement mixing, the external stirring drive device and the bone cement mixing cylinder are separate structures, the bone cement mixing cylinder comprises a cylinder body and a cap, the open end of the cylinder body is equipped with a cap, the bottom plate of the cylinder body is movable with a stirring shaft, the bottom end of the stirring shaft is equipped with a driven face gear, and the bottom of the cylinder body is provided with a plurality of plunger positioning grooves along the circumferential direction;

[0008] The external stirring drive device includes a socket, a plurality of socket grooves are arranged inwardly and side by side at the upper end of the socket, a plurality of spring plungers are embedded and installed on the bottom circumference of the socket groove, a driving motor is embedded and installed inside the socket, the output end of the driving motor is connected with a transmission horizontal shaft via a coupling, the transmission horizontal shaft is connected to the driven vertical shaft through an umbrella-shaped steering gear set, a sleeve is sleeved on the outer side of the driven vertical shaft, the inner end of the sleeve is fixedly connected to the top end of the driven vertical shaft via a compression spring, the top end of the sleeve supports a driving face gear that can engage with the driven face gear, and an avoidance groove is opened inward at the center of the socket groove to facilitate the vertical displacement of the driving face gear.

[0009] Furthermore, in the above-mentioned external stirring drive device for mixing bone cement, the outer diameter of the bone cement mixing cylinder and the diameter of the insertion groove match each other.

[0010] Furthermore, in the above-mentioned external stirring drive device for bone cement mixing, after the cylinder body of the bone cement mixing cylinder is inserted into the insertion groove, the plunger positioning groove on the periphery can be clamped on the outside of the corresponding spring plunger by rotating the cylinder body.

[0011] Furthermore, in the above-mentioned external stirring drive device for mixing bone cement, the position of the umbrella-shaped steering gear set corresponds one-to-one to the position of the plug-in slot.

[0012] Furthermore, in the above-mentioned external stirring drive device for mixing bone cement, the cross-section of the driven vertical shaft is a square structure, and the sleeve is a square sleeve that matches the driven vertical shaft.

[0013] Furthermore, in the above-mentioned external stirring drive device for mixing bone cement, an active cavity is provided in the socket to facilitate the rotation of the transmission horizontal shaft, the umbrella-shaped steering gear set, the driven vertical shaft, the sleeve and the active face gear.

[0014] The beneficial effects of the utility model are:

[0015] The external stirring drive device provided by the utility model is reasonably designed. It is a split structure with the bone cement mixing cylinder, and common parts can be used, which greatly reduces the cost of manufacturing and using the bone cement mixing cylinder. When bone cement mixing is required, the cylinder body of the bone cement mixing cylinder is inserted into the plug-in slot, and the positioning is completed by rotating the cylinder body so that the plunger positioning slot on the periphery is clamped on the outer side of the corresponding spring plunger. Then, the driving motor can drive the active face gear to rotate through the transmission horizontal shaft, the umbrella-shaped steering gear set, the driven vertical shaft, and the sleeve. The active face gear automatically moves downward under the pressure of the driven face gear. When the active face gear and the driven face gear are engaged with each other, they will automatically move upward under the support of the compression spring. At this time, the active face gear can drive the driven face gear to rotate synchronously, and the rapid stirring demand of the bone cement mixing cylinder can be met in this way.

[0016] Of course, any product implementing the present invention does not necessarily need to achieve all of the above advantages at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 It is a schematic diagram of the use state of the utility model;

[0019] Figure 2 It is a structural schematic diagram of a bone cement mixing cylinder in the utility model;

[0020] Figure 3 This is a schematic diagram of the main structure of the external stirring drive device in the utility model;

[0021] Figure 4 It is a schematic diagram of the top view of the structure of the external stirring drive device in the utility model;

[0022] Figure 5 It is a schematic diagram of the supporting structure of the active face gear in the utility model;

[0023] Figure 6 It is a cross-sectional schematic diagram of the driven vertical shaft and the sleeve in the utility model;

[0024] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0025] 1-external stirring drive device, 101-socket, 102-socket slot, 103-spring plunger, 104-avoidance slot, 105-driving motor, 106-transmission horizontal shaft, 107-umbrella steering gear set, 108-driven vertical shaft, 109-sleeve, 110-compression spring, 111-driving face gear, 2-bone cement mixing cylinder, 201-cylinder body, 202-cap, 203-stirring shaft, 204-driven face gear, 205-plunger positioning slot. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] like Figure 1-Figure 6 As shown, this embodiment is an external stirring drive device for bone cement mixing, the external stirring drive device 1 and the bone cement mixing barrel 2 are separate structures, the bone cement mixing barrel 2 includes a barrel 201 and a cap 202, the cap 202 is installed at the open end of the barrel 201, the bottom plate of the barrel 201 is restricted by a stirring shaft 203, the bottom end of the stirring shaft 203 is installed with a driven face gear 204, and the bottom of the barrel 201 is provided with a plurality of plunger positioning grooves 205 along the circumferential direction. The external stirring drive device 1 includes a socket 101, the upper end of the socket 101 is provided with a plurality of plug-in grooves 102 arranged side by side inwardly, and a plurality of spring plungers 103 are embedded and installed on the circumference of the bottom surface of the plug-in groove 102. A driving motor 105 is embedded and installed inside the socket 101. The output end of the driving motor 105 is connected to a transmission horizontal shaft 106 via a coupling. The transmission horizontal shaft 106 is transmission-connected to a driven vertical shaft 108 via an umbrella-shaped steering gear set 107. A sleeve 109 is sleeved and installed on the outer side of the driven vertical shaft 108. The inner end of the sleeve 109 is fixedly connected to the top of the driven vertical shaft 108 via a compression spring 110. The top of the sleeve 109 supports a driving face gear 111 that can engage with the driven face gear 204. A avoidance groove 104 is opened inward at the center of the plug slot 102 to facilitate the vertical displacement of the driving face gear.

[0028] In this embodiment, the outer diameter of the cylinder body 201 of the bone cement mixing cylinder 2 matches the diameter of the inserting groove 102 .

[0029] In this embodiment, after the cylinder body 201 of the bone cement mixing cylinder 2 is inserted into the insertion groove 102 , the plunger positioning groove 205 on the periphery can be clamped on the outer side of the corresponding spring plunger 103 by rotating the cylinder body 201 .

[0030] In this embodiment, the position of the umbrella-shaped steering gear set 107 corresponds to the position of the plug-in slot 102 one by one.

[0031] In this embodiment, the cross section of the driven vertical shaft 108 is a square structure, and the sleeve 109 is a square sleeve that matches the driven vertical shaft 108 .

[0032] In this embodiment, a movable cavity is provided in the socket 101 to facilitate the rotation of the transmission horizontal shaft 106, the umbrella-shaped steering gear set 107, the driven vertical shaft 108, the sleeve 109 and the driving face gear 111.

[0033] A specific application of this embodiment is as follows: the external stirring drive device 1 is reasonably designed, and it is a split structure with the bone cement mixing cylinder 2, and common components can be used, which greatly reduces the cost of the bone cement mixing cylinder and the cost of use; when bone cement mixing is required, the cylinder body of the bone cement mixing cylinder 2 is inserted into the plug-in slot 102, and the positioning can be completed by rotating the cylinder body 201 so that the plunger positioning slot 205 on the periphery is stuck on the outer side of the corresponding spring plunger 103; then the driving motor 105 can drive the active face gear 111 to rotate through the transmission horizontal shaft 106, the umbrella-shaped steering gear set 107, the driven vertical shaft 108, and the sleeve 109, and the active face gear 111 automatically moves down under the pressure of the driven face gear 204, and when the active face gear 11 and the driven face gear 204 are engaged with each other, they will automatically move up under the support of the compression spring 110, and at this time, the active face gear 111 can drive the driven face gear 204 to rotate synchronously, and in this way, the rapid stirring demand of the bone cement mixing cylinder can be met.

[0034] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to only specific implementation methods. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. The utility model is only limited by the claims and their full scope and equivalents.

Claims

1. An external stirring drive device for mixing bone cement, the external stirring drive device and the bone cement mixing barrel are separate structures, characterized in that: The bone cement mixing cylinder comprises a cylinder body and a cap, wherein the cap is installed at the open end of the cylinder body, a stirring shaft is movablely restricted on the bottom plate of the cylinder body, a driven face gear is installed at the bottom end of the stirring shaft, and a plurality of plunger positioning grooves are opened along the circumferential direction at the bottom of the cylinder body; The external stirring drive device includes a socket, a plurality of socket grooves are arranged inwardly and side by side at the upper end of the socket, a plurality of spring plungers are embedded and installed on the bottom circumference of the socket groove, a driving motor is embedded and installed inside the socket, the output end of the driving motor is connected with a transmission horizontal shaft via a coupling, the transmission horizontal shaft is connected to the driven vertical shaft through an umbrella-shaped steering gear set, a sleeve is sleeved on the outer side of the driven vertical shaft, the inner end of the sleeve is fixedly connected to the top end of the driven vertical shaft via a compression spring, the top end of the sleeve supports a driving face gear that can engage with the driven face gear, and an avoidance groove is opened inward at the center of the socket groove to facilitate the vertical displacement of the driving face gear.

2. The external stirring driving device for mixing bone cement according to claim 1, characterized in that: The outer diameter of the bone cement mixing cylinder matches the diameter of the inserting groove.

3. The external stirring driving device for mixing bone cement according to claim 1, characterized in that: After the cylinder body of the bone cement mixing cylinder is inserted into the insertion groove, the plunger positioning groove on the periphery can be clamped on the outer side of the corresponding spring plunger by rotating the cylinder body.

4. The external stirring driving device for mixing bone cement according to claim 1, characterized in that: The position of the umbrella-shaped steering gear set corresponds to the position of the plug-in slot one by one.

5. The external stirring driving device for mixing bone cement according to claim 1, characterized in that: The cross section of the driven vertical shaft is a square structure, and the sleeve is a square sleeve matched with the driven vertical shaft.

6. The external stirring driving device for mixing bone cement according to claim 1, characterized in that: The socket is provided with an active cavity which is convenient for the transmission horizontal shaft, the umbrella-shaped steering gear set, the driven vertical shaft, the sleeve and the driving face gear to rotate.

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