Electric bone saw with anti-falling structure

Abstract

The utility model provides an electric bone saw with an anti-drop structure, which comprises a saw head assembly, an auxiliary handle and a driving assembly, the saw head assembly is fixed at the front end of the driving assembly through a screw, and the upper side of the left end of the saw head assembly is in threaded connection with the auxiliary handle used for conveniently applying cutting depth force. Compared with the prior art, the anti-falling driving assembly has the advantages that by arranging the anti-falling shell sleeve, when the whole driving assembly falls off, the external anti-falling shell sleeve makes contact with the ground firstly, then certain protection can be formed on the driving assembly, and damage caused by falling impact is reduced; the impact damage of the impact force to the connecting shaft and the transmission shaft is attenuated under the combined action of potential energy recovery of the compression spring and friction force, so that the connecting shaft and the transmission shaft have high anti-falling capacity, and the anti-impact capacity of the transmission part structure of the saw head assembly is greatly improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of medical equipment, especially relates to an electric bone saw with anti-falling structure. BACKGROUND

[0002] Many medical electric bone saws are made of plastic or light alloy, which lacks sufficient anti-falling ability while ensuring the lightness of the tool, so that the equipment is prone to shell damage or internal mechanical component displacement when falling in a high-intensity surgical environment, especially the shaft rod type components driving the saw blade, which are very easy to shake or even damage related parts under a large drop impact, affecting normal use of the equipment. The traditional anti-falling methods include adding a protective rubber sleeve outside the electric bone saw, installing a shockproof structure, and using a more solid material.

[0003] However, these methods are not universal, although the protective rubber sleeve can absorb impact force to some extent and reduce damage caused by falling, it often increases the weight of the tool, affecting the operation flexibility and comfort of the surgeon, therefore, we hope to design an electric bone saw with a new structure to solve this problem. UTILITY MODEL CONTENTS

[0004] In view of the deficiencies in the prior art, the utility model aims to provide an electric bone saw with an anti-falling structure to solve the problems raised in the background.

[0005] The utility model realizes the following technical scheme: an electric bone saw with an anti-falling structure, comprising: a saw head assembly, an auxiliary handle, and a driving assembly, the saw head assembly is fixed at the front end of the driving assembly through screws, and the left end of the saw head assembly is screw-connected with an auxiliary handle on the upper side for conveniently applying cutting depth;

[0006] The saw head assembly comprises a transmission head, a transmission shaft, a saw blade, a connecting shaft, and a fixed cover, the transmission head is rotatably installed with a transmission shaft on the lower side, the connecting shaft is fixed with a saw blade at the lower end, and the connecting shaft is fixed with a saw blade at the lower end through screws and a fixed cover;

[0007] The driving assembly comprises a bone saw body, a mobile power supply, a driving motor, and an anti-falling shell cover, the mobile power supply is movably installed at the rear end of the bone saw body, the driving motor is installed inside the bone saw body, and the bone saw body and the mobile power supply are externally sleeved with the anti-falling shell cover.

[0008] As a preferred implementation, the transmission shaft comprises a shaft rod, a compression spring, a limiting plate and a threaded cylinder, the lower end of the shaft rod is provided with an expansion cavity upward, the inner wall of the lower end of the expansion cavity is fixed with a flexible sleeve one, the inner diameter of the lower end of the flexible sleeve one is matched with the diameter of the connecting ball, and the upper side of the connecting ball is partially arranged in the inner part of the lower end of the flexible sleeve one, and the lower end of the connecting ball is partially arranged in the rotating cavity of the inner part of the flexible sleeve two.

[0009] As a preferred implementation, the upper side of the inner part of the shaft rod is fixed with the compression spring, the upper end of the compression spring is fixedly connected with the bottom of the expansion cavity, and the lower end of the compression spring is fixedly connected with the upper surface of the limiting plate.

[0010] The edge of the limiting plate is provided with a semicircular structure, and the limiting plate is arranged in the middle part of the expansion cavity.

[0011] The inner wall of the expansion cavity is provided with an annular boss in the middle part, the inner diameter of the upper side of the expansion cavity is smaller than that of the lower side, when the limiting plate abuts against the upper side of the annular boss in the middle part of the expansion cavity, the compression spring is in a compressed state, the compressed state is at the half position of the conventional compression stroke of the compression spring, when the connecting shaft is rotated by the transmission shaft, the pressing force of the compression spring makes the connecting shaft always in a stable state and cannot shake.

[0012] As a preferred implementation, the upper end of the flexible sleeve one is clamped with the annular boss of the middle inner wall of the expansion cavity, and the inner part of the flexible sleeve one is provided with a mounting cavity.

[0013] As a preferred implementation, the inner diameter of the lower end of the mounting cavity is larger than that of the upper end, the lower surface of the limiting plate is provided with the threaded cylinder in the middle part, and the threaded cylinder is movably mounted in the upper side of the inner part of the flexible sleeve one.

[0014] As a preferred implementation, the connecting shaft comprises a screw rod one, a limiting skirt one, a screw rod two, a limiting skirt two and a connecting ball, the lower end of the screw rod one is integrally provided with the limiting skirt one.

[0015] The lower end of the limiting skirt one is integrally provided with the upper end of the connecting ball, the lower end of the connecting ball is integrally provided with the upper end of the limiting skirt two, and the lower end of the limiting skirt two is integrally provided with the screw rod two.

[0016] As a preferred implementation, the fixed cover comprises a flexible sleeve two cover, the cover is divided into a left cover and a right cover, the left cover and the right cover are combined to form a complete cover, and the inner wall of the cover is glued with the flexible sleeve two.

[0017] The flexible sleeve two is divided into a left sleeve and a right sleeve, the inner part of the flexible sleeve two is provided with a rotating cavity, and the cross-sectional structure and size of the rotating cavity are matched with the structure and size of the outer wall of the lower end of the connecting ball.

[0018] The beneficial effects of the utility model are that the anti-falling shell sleeve is fixed to the outer wall of the bone saw main body and the outer side of the mobile power supply, so that the outer side of the bone saw main body and the outer wall of the mobile power supply have a protective structure, the external anti-falling shell sleeve contacts the ground first when the whole driving assembly falls, thereby forming a certain protection for the driving assembly and reducing damage caused by falling impact;

[0019] The transmission shaft, the connecting shaft and the fixing cover are arranged, and the impact damage of the impact force to the connecting shaft and the transmission shaft is attenuated under the joint action of the potential energy and the friction force of the compression spring, so that the connecting shaft and the transmission shaft have strong anti-falling capability, and the impact resistance of the transmission part structure of the saw head assembly is greatly improved. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the embodiment or the prior art description will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained according to these drawings without creative labor for those skilled in the art.

[0021] Figure 1 It is a whole structure schematic view of the utility model of the electric bone saw with the anti-falling structure.

[0022] Figure 2 It is an anti-falling shell sleeve structure schematic view of the utility model of the electric bone saw with the anti-falling structure.

[0023] Figure 3 It is a saw head assembly structure schematic view of the utility model of the electric bone saw with the anti-falling structure.

[0024] Figure 4 It is a transmission shaft and connecting shaft connecting structure schematic view of the utility model of the electric bone saw with the anti-falling structure.

[0025] Figure 5 It is a transmission shaft and fixing cover connecting schematic view of the utility model of the electric bone saw with the anti-falling structure.

[0026] Figure 6 It is a fixing cover structure schematic view of the utility model of the electric bone saw with the anti-falling structure.

[0027] Figure 7 It is a connecting shaft structure schematic view of the utility model of the electric bone saw with the anti-falling structure.

[0028] In the figure, 100 - saw head assembly, 110 - transmission head, 120 - transmission shaft, 121 - shaft rod, 122 - compression spring, 123 - limit plate, 124 - threaded cylinder, 125 - flexible sleeve I, 126 - telescopic cavity, 127 - mounting cavity, 130 - saw blade, 140 - connecting shaft, 141 - screw rod I, 142 - limit skirt block I, 143 - connecting ball, 144 - limit skirt block, 145 - screw rod II, 150 - fixed cover, 151 - cover, 152 - flexible sleeve II, 153 - rotating cavity;

[0029] 200 - auxiliary handle;

[0030] 300 - drive assembly, 310 - osteotome body, 320 - anti-falling shell. DETAILED DESCRIPTION

[0031] 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 protection scope of the utility model.

[0032] Please refer to Figures 1 to 7 The utility model provides a kind of technical solutions: an electric osteotome with anti-falling structure, comprising: saw head assembly 100, auxiliary handle 200 and drive assembly 300, saw head assembly 100 is fixed in drive assembly 300 front end by screw, the auxiliary handle 200 for facilitating the application of cutting depth degree of force is threadedly connected on the left end upper side of saw head assembly 100;

[0033] Saw head assembly 100 includes transmission head 110, transmission shaft 120, saw blade 130, connecting shaft 140 and fixed cover 150, transmission head 110 lower side is rotatably installed with transmission shaft 120, the lower end of transmission shaft 120 is fixed with connecting shaft 140 by screw and fixed cover 150, connecting shaft 140 lower end is fixed with saw blade 130;

[0034] Drive assembly 300 includes osteotome body 310, mobile power supply, drive motor and anti-falling shell 320, mobile power supply is movably installed in the rear end of osteotome body 310, drive motor is installed in osteotome body 310, osteotome body 310 and mobile power supply are externally sleeved with anti-falling shell 320.

[0035] By setting the anti-falling shell 320, the anti-falling shell 320 is fixed on the outer wall of the bone saw main body 310 and the outer side of the mobile power supply, which makes the outer side of the bone saw main body 310 and the outer wall of the mobile power supply have a protective structure (the inner wall structure of the anti-falling shell 320 matches the position corresponding to the outer side of the bone saw main body 310 and the outer wall of the mobile power supply, and the anti-falling shell 320 can be fixed on the outer wall of the bone saw main body 310 and the outer side of the mobile power supply by heat shrinkage technology, and the material of the anti-falling shell 320 is preferably a material that shrinks and deforms upon heating, or a material with high elasticity), When the entire drive assembly 300 falls, the external anti-falling shell 320 first contacts the ground, thereby forming a certain protection for the drive assembly 300, reducing damage caused by falling impact.

[0036] Please refer to Figures 3 to 7 The transmission shaft 120 includes a shaft rod 121, a compression spring 122, a limiting plate 123, and a threaded cylinder 124. The lower end of the shaft rod 121 is upwardly provided with an expansion cavity 126. The inner wall of the lower end of the expansion cavity 126 is fixedly provided with a flexible sleeve 125. The inner diameter of the lower end of the flexible sleeve 125 matches the diameter of the connecting ball 143. The upper side of the connecting ball 143 is disposed inside the lower end of the flexible sleeve 125, and the lower end of the connecting ball 143 is disposed inside a rotating cavity 153 in the flexible sleeve 152.

[0037] The upper side of the inside of the shaft rod 121 is fixedly provided with the compression spring 122. The upper end of the compression spring 122 is fixedly connected with the bottom of the expansion cavity 126. The lower end of the compression spring 122 is fixedly connected with the upper surface of the limiting plate 123.

[0038] The edge of the limiting plate 123 is in a semicircular structure. The limiting plate 123 is disposed in the middle part of the expansion cavity 126.

[0039] The inner wall of the expansion cavity 126 is provided with an annular boss in the middle. The inner diameter of the upper side of the expansion cavity 126 is smaller than that of the lower side. When the limiting plate 123 abuts against the annular boss in the middle of the expansion cavity 126, the compression spring 122 is in a compressed state, which is at the half position of the normal compression stroke of the compression spring 122. When the transmission shaft 120 drives the connecting shaft 140 to rotate, the pressing force of the compression spring 122 makes the connecting shaft 140 always in a stable state and does not shake.

[0040] The upper end of the flexible sleeve 125 is externally connected with the annular boss in the middle of the inner wall of the expansion cavity 126. The inside of the flexible sleeve 125 is provided with a mounting cavity 127. The upper end of the mounting cavity 127 is in communication with the lower end of the expansion cavity 126.

[0041] The inner diameter of the lower end of the mounting cavity 127 is larger than that of the upper end. The lower surface of the limiting plate 123 is provided with the threaded cylinder 124. The threaded cylinder 124 is movably installed in the inside of the upper side of the flexible sleeve 125.

[0042] The connecting shaft 140 comprises a screw rod one 141, a limiting skirt block one 144 one 142, a screw rod two 145, a limiting skirt block two 144, and a connecting ball 143, the lower end of the screw rod one 141 is integrally provided with the limiting skirt block one 144 one 142;

[0043] The lower end of the limiting skirt block one 144 one 142 is integrally provided with the upper end of the connecting ball 143, the lower end of the connecting ball 143 is integrally provided with the upper end of the limiting skirt block two 144, and the lower end of the limiting skirt block two 144 is integrally provided with the screw rod two 145.

[0044] The fixed cover 150 comprises a flexible sleeve two 152 and a cover 151, the cover 151 is divided into a left cover and a right cover, the left cover and the right cover form a complete cover 151, and the inner wall of the cover 151 is glued with the flexible sleeve two 152;

[0045] The flexible sleeve two 152 is divided into a left sleeve and a right sleeve, and the flexible sleeve two 152 is provided with a rotating cavity 153, the cross-sectional structure and the size of the rotating cavity 153 are matched with the structure and the size of the outer wall of the lower end of the connecting ball 143.

[0046] As a second embodiment of the utility model, in actual use, when the whole bone saw falls and the lower end of the connecting shaft 140 first contacts the ground, at this moment, the connecting shaft 140 is subjected to a greater impact force and has a tendency to move along the direction of the impact force, at the moment when the connecting shaft 140 is impacted, the connecting ball 143 extrudes the position of the connection between the flexible sleeve one 125 and the flexible sleeve two 152 along the direction of the impact force, so that the position of the connection between the flexible sleeve one 125 and the flexible sleeve two 152 is deformed, since the connecting shaft 140 is connected with the limiting plate 123 through the screw rod one 141 and the threaded cylinder 124, at the moment when the connecting shaft 140 is impacted, the connecting shaft 140 drives the limiting plate 123 to move along the direction of the impact force through the screw rod one 141 and the threaded cylinder 124, if it is vertically upward, the limiting plate 123 is extruded and pressed against the compression spring 122, if it is inclined at a certain angle, the limiting plate 123 will be deflected by a certain angle, the deflection angle is determined based on the impact angle and the size of the impact force, while the limiting plate 123 is deflected, the impact force has an upward resultant force to push the limiting plate 123 to press against the compression spring 122, at this moment, the whole connecting shaft 140 is contracted and compressed to press against the compression spring 122, and under the joint action of the potential energy and the friction force of the compression spring 122, the impact damage of the impact force to the connecting shaft 140 and the transmission shaft 120 is attenuated, so that the connecting shaft 140 and the transmission shaft 120 have strong anti-falling ability, and the impact resistance of the transmission part structure of the saw head assembly 100 is greatly improved (the transmission shaft 120 is commonly used in the market to be connected with the output shaft of the driving motor in a right-angle transmission structure, which is prior art, and the specific structure and working principle are not described here).

[0047] The above merely describes preferred embodiments of the present application and is not intended to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An electric osteotome having a fall-proof structure, comprising: The saw head assembly (100), the auxiliary handle (200) and the driving assembly (300) are characterized in that the saw head assembly (100) is fixed on the front end of the driving assembly (300) through screws, and the auxiliary handle (200) is threadedly connected to the upper side of the left end of the saw head assembly (100) to facilitate the application of cutting depth force. The saw head assembly (100) comprises a transmission head (110), a transmission shaft (120), a saw blade (130), a connecting shaft (140) and a fixing cover (150), the transmission shaft (120) is rotatably installed on the lower side of the transmission head (110), the connecting shaft (140) is fixed on the lower end of the transmission shaft (120) through screws and the fixing cover (150), and the saw blade (130) is fixed on the lower end of the connecting shaft (140). The driving assembly (300) comprises a bone saw body (310), a mobile power supply, a driving motor and an anti-falling shell (320), the mobile power supply is movably installed on the rear end of the bone saw body (310), the driving motor is installed in the bone saw body (310), and the bone saw body (310) and the mobile power supply are sleeved with the anti-falling shell (320) outside.

2. The electric osteotome with anti-falling structure according to claim 1, characterized in that: The transmission shaft (120) comprises a shaft rod (121), a compression spring (122), a limiting plate (123) and a threaded cylinder (124), the lower end of the shaft rod (121) is upwardly provided with an expansion cavity (126), and the lower end inner wall of the expansion cavity (126) is fixedly provided with a flexible sleeve one (125).

3. The electric osteotome with an anti-falling structure according to claim 2, characterized in that: The upper side of the inside of the shaft rod (121) is fixedly provided with the compression spring (122), the upper end of the compression spring (122) is fixedly connected with the bottom of the expansion cavity (126), and the lower end of the compression spring (122) is fixedly connected with the upper surface of the limiting plate (123). The edge cross section of the limiting plate (123) is in a semicircular structure, and the limiting plate (123) is arranged in the middle part of the expansion cavity (126). The middle part of the inner wall of the expansion cavity (126) is provided with an annular boss, and the inner diameter of the upper side part of the expansion cavity (126) is smaller than that of the lower side part.

4. The electric osteosaw according to claim 3, wherein: The upper end part outer wall of the flexible sleeve one (125) is clamped with the annular boss of the middle inner wall of the expansion cavity (126), and the inside of the flexible sleeve one (125) is provided with a mounting cavity (127), and the upper end of the mounting cavity (127) is in communication with the lower end of the expansion cavity (126).

5. The electric osteosaw according to claim 4, wherein: The inner diameter of the lower end of the mounting cavity (127) is larger than that of the upper end part, the middle of the lower surface of the limiting plate (123) is provided with the threaded cylinder (124), and the threaded cylinder (124) is movably installed in the inside of the upper side of the flexible sleeve one (125).

6. The electric bone saw with an anti-falling structure according to claim 1, characterized in that: The connecting shaft (140) comprises a screw rod one (141), a limiting skirt block (144) one (142), a screw rod two (145), a limiting skirt block (144) two and a connecting ball (143), the lower end of the screw rod one (141) is integrally provided with the limiting skirt block (144) one (142). The lower end of the limiting skirt block (144) is integrally provided with the upper end of the connecting ball (143), the lower end of the connecting ball (143) is integrally provided with the upper end of the limiting skirt block (144), and the lower end of the limiting skirt block (144) is integrally provided with the screw rod (145).

7. The electric osteosaw according to claim 6, wherein: The fixed cover (150) comprises a flexible sleeve (152) sleeved with a cover (151), the cover (151) is divided into a left cover and a right cover, the left cover and the right cover are combined to form a complete cover (151), and the inner wall of the cover (151) is glued with the flexible sleeve (152); The flexible sleeve (152) is divided into a left sleeve and a right sleeve, the flexible sleeve (152) is internally provided with a rotating cavity (153), and the cross-sectional structure and size of the rotating cavity (153) are matched with the structure and size of the outer wall of the lower end of the connecting ball (143).

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