Speed reducer for medical equipment

Abstract

The utility model provides a speed reducer for medical equipment, belongs to the technical field of speed reducers, and solves the technical problems that the existing speed reducer is difficult to disassemble, and is inconvenient to disassemble for sterilization and disinfection after medical operation. The speed reducer for the medical equipment comprises a shell, a first mounting part and a second mounting part are arranged in the shell, the first mounting part comprises a limiting angle groove formed in the shell, a first bearing is in contact with the interior of the limiting angle groove, the first bearing is in interference fit with one end of a worm, and a limiting circular truncated cone is integrally formed at the other end of the worm; an input shaft is integrally formed at the rear end of the limiting circular truncated cone and sleeved with a second bearing, the rear end of the second bearing makes contact with a first elastic clamping ring, a first annular groove used for containing the first elastic clamping ring is formed in the shell, and a first bearing isolator is arranged at the rear end of the first elastic clamping ring. The first bearing isolator is detachably connected between the shell and the input shaft, and the worm is meshed with a worm gear. The utility model has the advantages of being detachable, convenient for disinfection and sterilization and the like.

Description

Technical Field

[0001] The utility model belongs to the technical field of reducers and relates to a medical direction reducer, in particular to a reducer for medical equipment. Background Art

[0002] With the advancement of the times, existing medical tools have gradually adopted automated equipment, which requires the use of reducers to better achieve the accuracy of the operation of medical tools.

[0003] A search revealed a new type of reducer, such as the one disclosed in Chinese patent literature [Application Number: 201821779620.X; Publication Number: CN209026161U]. This new reducer utilizes a single housing housing two transmission mechanisms to drive the manipulator's rotation and feed, respectively. This replaces the existing two reducers that each drive the manipulator, thus saving installation space.

[0004] Although the new reducer disclosed in this patent reduces the installation space, the equipment in the medical field should be fully sterilized after use. The existing planetary reducer is difficult to disassemble and is not convenient for sterilization after medical operation. Utility Model Content

[0005] The purpose of this utility model is to solve the above problems in the existing technology and propose a reducer for medical equipment. The technical problem to be solved by this utility model is: how to make the reducer detachable for easy disinfection and sterilization.

[0006] The purpose of this utility model can be achieved through the following technical solutions:

[0007] A reducer for medical equipment includes a shell, in which a first mounting part and a second mounting part are provided. The first mounting part includes a limiting angle groove opened in the shell, in which a first bearing is in contact, and the movable end of the first bearing is interference-fitted with one end of a worm, and the other end of the worm is integrally formed with a limiting cone, and the rear end of the limiting cone is integrally formed with an input shaft, a second bearing is sleeved on the input shaft, and the rear end of the second bearing is in contact with a first elastic retaining ring, a first ring groove for placing the first elastic retaining ring is opened in the shell, and a first bearing isolator is provided at the rear end of the first elastic retaining ring, and the first bearing isolator is detachably connected between the shell and the input shaft, a worm wheel is meshed with the worm, and the turbine is provided on the second mounting part.

[0008] The working principle of the utility model is: when the reducer needs to be disinfected, the first bearing isolator is pulled out, and the inner protrusions at both ends of the first elastic snap ring are clasped with two fingers. Force is applied to combine the two fingers so that the two ends of the first elastic snap ring are close to each other. The first elastic snap ring is deformed and disengaged from the first ring groove and can be taken out. The second bearing loses the interference of the first elastic snap ring and can be directly taken out. Then the input shaft is taken out, and the limiting cone, worm and limiting plate are all taken out along with the input shaft. The second bearing loses the limit of the limiting plate and can be taken out, thereby realizing the disassembly of the first mounting part, which is convenient for disinfection or maintenance and replacement of parts in sequence.

[0009] The rear end of the input shaft extends outside the housing.

[0010] With the above structure, the input shaft is used to connect to a drive unit such as an external motor. The input shaft drives the worm to rotate, the worm is transmitted to the turbine, and the turbine drives the shaft head to rotate to achieve reduction transmission.

[0011] The second mounting portion includes a connecting ring that is interference-fitted on the inner wall of the worm gear, a shaft neck passes through the connecting ring, and slots are provided on the shaft neck and the connecting ring. A connecting key is placed in the slot, and the connecting key is adapted to the slot.

[0012] Using the above structure, place the connecting key into the notch of the shaft neck, align the notch of the connecting ring with the position of the connecting key, and slide it upward until the connecting key is located between the connecting ring and the shaft neck. When the worm wheel is rotated by the worm, the connecting ring rotates with the worm wheel, the connecting key drives the shaft neck to rotate with the connecting ring, and the shaft neck drives the shaft body and the shaft head to rotate.

[0013] The journal is sleeved with a distance cylinder, the top of which contacts the bottom of the connecting ring, the bottom of which contacts the third bearing, and the third bearing is sleeved on a shaft body integrally formed with the bottom of the journal, the bottom of which is integrally formed with a shaft head.

[0014] With the above structure, the distance cylinder supports the connecting key and the connecting ring below the connecting ring, positioning the connecting ring between the shaft shoulder and the distance cylinder, thereby achieving the positioning of the worm gear fixed to the connecting ring.

[0015] A second bearing isolator is detachably connected between the shaft head and the housing.

[0016] With the above structure, the second bearing isolator supports the third bearing by being tightly mounted, and the third bearing supports the distance cylinder at the contact end with the shaft body, thereby realizing the positioning of each component.

[0017] A top column is integrally formed on the top of the shaft shoulder, a fourth bearing is interference fit on the top column, a second elastic snap ring is in contact with the top of the fourth bearing, a second ring groove matching the second elastic snap ring is opened in the shell, and an end cover is provided on the top column.

[0018] With the above structure, when disassembling, press the edge of the end cover to make the other side tilt up, pick out the end cover from the tilted part, hold the protrusions at both ends of the second elastic snap ring with two fingers, apply force to reduce the distance between the two ends, so that the second elastic snap ring is disengaged from the second ring groove, so that the second elastic snap ring can be taken out, and the fourth bearing is no longer restricted by the second elastic snap ring and can be taken out. Hold the top column to take out the one-piece molded structure of the shaft shoulder, shaft neck, shaft body, and shaft head, so that the worm gear, connecting ring, distance cylinder, third bearing and second bearing isolator can all be taken out, thereby realizing the disassembly of the second mounting part, which is convenient for disinfection or maintenance and replacement.

[0019] A magnetic layer is attached to the outer surface of the end cover, and the end cover is magnetically connected to the shell.

[0020] With the above structure, a magnetic layer is attached to the contact position between the shell and the end cover, which can be attracted to the magnetic layer on the surface of the end cover. The end cover is installed by friction and magnetically connected to the shell at the same time, thereby strengthening the connection.

[0021] Compared with the existing technology, this reducer for medical equipment has the following advantages:

[0022] 1. By providing the first mounting portion and the second mounting portion, the parts in the housing can be disassembled and assembled, which is convenient for disinfection and sterilization after use. Moreover, the parts are installed by interfering with each other, which is convenient for maintenance and replacement of parts, reducing the loss of integral replacement caused by fixation.

[0023] 2. The bearing isolator has sealing performance to reduce infection. It can be disassembled and assembled for easy sterilization and disinfection, and at the same time it plays the role of providing support force to ensure clear positioning of non-fixed parts when they support each other. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural diagram of the present utility model.

[0025] Figure 2 It is a schematic diagram of the cross-sectional structure of the shell in the utility model.

[0026] Figure 3 It is a structural diagram of the input shaft part of the utility model.

[0027] Figure 4 It is a structural diagram of the central shaft body portion of the utility model.

[0028] Figure 5 It is a structural diagram of the journal part of the utility model.

[0029] Figure 6 It is a structural diagram of the worm gear part in the utility model.

[0030] Figure 7 It is a structural diagram of the worm part in the utility model.

[0031] Figure 8It is the structure schematic view of worm part in the utility model.

[0032] In the figure, 1, shell; 101, limit angle groove; 102, first ring groove; 103, second ring groove; 2, first bearing isolator; 3, input shaft; 4, limit circular table; 401, limit plate; 5, worm; 6, first bearing; 601, second bearing; 7, first elastic snap ring; 8, worm wheel; 9, connecting ring; 10, journal; 11, second bearing isolator; 12, third bearing; 13, fixed distance cylinder; 14, shaft body; 15, shaft head; 16, connecting key; 1601, notch; 17, shaft shoulder; 18, fourth bearing; 19, second elastic snap ring; 20, end cover; 21, top column. DETAILED DESCRIPTION

[0033] The following is the specific embodiment of the utility model and is further described the technical scheme of the utility model in combination with the drawings, but the utility model is not limited to these embodiments.

[0034] As Figures 1-8 The utility model discloses a speed reducer for medical equipment, including the shell 1, be provided with first installation part and second installation part in the shell 1, first installation part includes the limit angle groove 101 that sets up in the shell 1, the first bearing 6 is contacted in the limit angle groove 101, the first bearing 6 movable end interference fit has one end of worm 5, the first bearing 6 rear end contacts with limit plate 401, the limit circular table 4 is integrally formed in the other end of worm 5, the input shaft 3 is integrally formed in the rear end of limit circular table 4, the second bearing 601 is set up on input shaft 3, the second bearing 601 rear end contacts with first elastic snap ring 7, the first ring groove 102 for placing first elastic snap ring 7 is set up in the shell 1, the first bearing isolator 2 is set up in the rear end of first elastic snap ring 7, the first bearing isolator 2 can be detachably connected between the shell 1 and input shaft 3, the worm 5 is engaged with worm wheel 8, and the worm wheel 8 is arranged on the second installation part, in this embodiment, the first bearing isolator 2 and the second bearing isolator 11 are all prior art, which is installed by pressing the rotating shaft that makes the bearing isolator 2 contact with the inner wall closely, when the speed reducer needs to be sterilized, the first bearing isolator 2 is pried out, the double finger is buckled in the inner protruding place of the both ends of first elastic snap ring 7, the force is combined, the both ends of first elastic snap ring 7 are close to first elastic snap ring 7, and the deformation is separated from the first ring groove 102, so the first bearing isolator 2 can be taken out, the second bearing 601 loses the resistance of first elastic snap ring 7 and can be directly taken out, then the input shaft 3 is taken out, the limit circular table 4, the worm 5 and the limit plate 401 are taken out with the input shaft 3, the second bearing 601 loses the limitation of limit plate 401 and can be taken out, the first installation part is disassembled, and the parts are sterilized or overhauled and replaced in sequence.

[0035] The rear end of the input shaft 3 extends outside the housing 1. In this embodiment, the input shaft 3 is used to connect to a driving part such as an external motor. The input shaft 3 drives the worm 5 to rotate, and the worm 5 is transmitted to the turbine 8. The turbine 8 drives the shaft head 15 to rotate to achieve a reduction transmission.

[0036] The second mounting portion includes a connecting ring 9 that is interference fit on the inner wall of the worm gear 8, and a shaft neck 10 passes through the connecting ring 9. A slot 1601 is provided on the shaft neck 10 and the connecting ring 9, and a connecting key 16 is placed in the slot 1601. The connecting key 16 is adapted to the slot 1601. In this embodiment, the connecting key 16 is placed in the slot 1601 of the shaft neck 10, and the slot 1601 of the connecting ring 9 is aligned with the position of the connecting key 16 and slid upward until the connecting key 16 is located between the connecting ring 9 and the shaft neck 10. When the worm gear 8 is rotated by the worm 5, the connecting ring 9 rotates with the worm gear 8, the connecting key 16 drives the shaft neck 10 to rotate along with the connecting ring 9, and the shaft neck 10 drives the shaft body 14 and the shaft head 15 to rotate.

[0037] A distance cylinder 13 is sleeved on the journal 10, the top of the distance cylinder 13 contacts the bottom of the connecting ring 9, and the bottom of the distance cylinder 13 contacts the third bearing 12. The third bearing 12 is sleeved on an axle body 14 integrally formed with the bottom end of the journal 10, and a shaft head 15 is integrally formed at the bottom end of the axle body 14. In this embodiment, the distance cylinder 13 supports the connecting key 16 and the connecting ring 9 below the connecting ring 9, positioning the connecting ring 9 between the shaft shoulder 17 and the distance cylinder 13, thereby realizing the positioning of the worm gear 8 fixed to the connecting ring 9.

[0038] A second bearing isolator 11 is detachably connected between the shaft head 15 and the housing 1. In this embodiment, the second bearing isolator 11 supports the third bearing 12 by being tightly installed. The contact end of the third bearing 12 and the shaft body 14 supports the distance cylinder 13 to achieve the positioning of each part.

[0039] The top of the journal 10 is integrally formed with a shaft shoulder 17, and the top of the shaft shoulder 17 is integrally formed with a top column 21. A fourth bearing 18 is interference-fitted on the top column 21. The top of the fourth bearing 18 contacts a second elastic snap ring 19. A second ring groove 103 adapted to the second elastic snap ring 19 is provided in the housing 1. An end cover 20 is provided on the top column 21. In this embodiment, when disassembling, press the edge of the end cover 20 to make the other side tilt up, pull out the end cover 20 from the tilted part, and hold the two ends of the second elastic snap ring 19 with two fingers. At the protrusion, force is applied to reduce the distance between the two ends, so that the second elastic retaining ring 19 is disengaged from the second ring groove 103, so that the second elastic retaining ring 19 can be removed, and the fourth bearing 18 is no longer restricted by the second elastic retaining ring 19 and can be removed. The handheld top column 21 is used to remove the shaft shoulder 17, the shaft neck 10, the shaft body 14, and the shaft head 15 together constitute a stepped shaft, so that the worm gear 8, the connecting ring 9, the distance cylinder 13, the third bearing 12 and the second bearing isolator 11 can all be removed, thereby realizing the disassembly of the second mounting part, which is convenient for disinfection or maintenance and replacement.

[0040] A magnetic layer is attached to the outer surface of the end cover 20, and the end cover 20 is magnetically connected to the shell 1. In this embodiment, a magnetic layer is attached to the contact position between the shell 1 and the end cover 20, which can be attracted to the magnetic layer on the surface of the end cover 20. The end cover 20 is installed by friction and is magnetically connected to the shell 1 at the same time, thereby strengthening the connection.

[0041] The working principle of the utility model is as follows: put the connecting key 16 into the notch 1601 of the journal 10, align the notch 1601 of the connecting ring 9 with the position of the connecting key 16 and slide it upward until the connecting key 16 is located between the connecting ring 9 and the journal 10. When the worm wheel 8 is driven by the worm 5 to rotate, the connecting ring 9 rotates with the worm wheel 8, the connecting key 16 drives the journal 10 to rotate with the connecting ring 9, and the journal 10 drives the shaft body 14 and the shaft head 15 to rotate. The distance cylinder 13 supports the connecting key 16 and the connecting ring 9 below the connecting ring 9, and positions the connecting ring 9 on the shaft shoulder 17. The second bearing isolator 11 supports the third bearing 12 by tightly mounting, and the third bearing 12 supports the distance cylinder 13 at the contact end of the shaft body 14 to realize the positioning of each part. The contact position between the housing 1 and the end cover 20 is provided with a magnetic layer, which can be attracted to the magnetic layer on the surface of the end cover 20. The end cover 20 is installed by friction and is magnetically connected to the housing 1 at the same time. The input shaft 3 is used to connect with a drive part such as an external motor. The input shaft 3 drives the worm 5 to rotate, and the worm 5 transmits Move to the turbine 8, the turbine 8 drives the shaft head 15 to rotate, realizing the reduction transmission. When the reducer needs to be disinfected, pull out the first bearing isolator 2, hold the inner protrusions at both ends of the first elastic snap ring 7 with two fingers, apply force and combine the two fingers, so that the two ends of the first elastic snap ring 7 are close to each other. The first elastic snap ring 7 is deformed and disengaged from the first ring groove 102 and can be taken out. The second bearing 601 loses the resistance of the first elastic snap ring 7 and can be taken out directly. Then take out the input shaft 3, the limiting cone 4, the worm 5 and the limiting plate 401 are all taken out with the input shaft 3, and the second bearing 601 loses the limiting plate The limit of 401 can be removed to realize the disassembly of the first mounting part. During disassembly, press the edge of the end cover 20 to make the other side tilt up, and pull out the end cover 20 from the tilted part. Hold the protrusions at both ends of the second elastic snap ring 19 with two fingers, apply force to reduce the distance between the two ends, so that the second elastic snap ring 19 is disengaged from the second ring groove 103, so that the second elastic snap ring 19 can be removed. The fourth bearing 18 loses the restriction of the second elastic snap ring 19 and can be removed. Hold the top column 21 to remove the stepped shaft, so that the worm gear 8, connecting ring 9, distance cylinder 13, third bearing 12 and second bearing isolator 11 can all be removed.

[0042] In summary, by providing the first mounting portion and the second mounting portion, the reducer can be disassembled to facilitate disinfection, maintenance and replacement of parts.

[0043] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments without departing from the spirit of the present invention or exceeding the scope defined by the appended claims.

Claims

1. A reducer for medical equipment, comprising a housing (1), characterized in that: The housing (1) is provided with a first mounting portion and a second mounting portion. The first mounting portion includes a limiting angle groove (101) provided in the housing (1). The limiting angle groove (101) contacts a first bearing (6). The movable end of the first bearing (6) is interference-fitted with one end of the worm (5). The rear end of the first bearing (6) contacts a limiting plate (401). The other end of the worm (5) is integrally formed with a limiting truncated cone (4). The rear end of the limiting truncated cone (4) is integrally formed with an input shaft (3). The input A second bearing (601) is sleeved on the shaft (3), and the rear end of the second bearing (601) contacts a first elastic snap ring (7). A first ring groove (102) for accommodating the first elastic snap ring (7) is provided in the housing (1). A first bearing isolator (2) is provided at the rear end of the first elastic snap ring (7). The first bearing isolator (2) is detachably connected between the housing (1) and the input shaft (3). A worm wheel (8) is engaged with the worm (5), and the turbine (8) is provided on the second mounting portion.

2. A reducer for medical equipment according to claim 1, characterized in that: The rear end of the input shaft (3) extends outside the housing (1).

3. The reducer for medical equipment according to claim 1, characterized in that: The second mounting portion includes a connecting ring (9) that is interference-fitted on the inner wall of the worm gear (8), a shaft neck (10) passing through the connecting ring (9), a notch (1601) being provided on both the shaft neck (10) and the connecting ring (9), a connecting key (16) being placed in the notch (1601), and the connecting key (16) being adapted to the notch (1601).

4. A reducer for medical equipment according to claim 3, characterized in that: A distance cylinder (13) is sleeved on the journal (10), the top of the distance cylinder (13) contacts the bottom of the connecting ring (9), the bottom of the distance cylinder (13) contacts a third bearing (12), the third bearing (12) is sleeved on an axle body (14) integrally formed with the bottom end of the journal (10), and a shaft head (15) is integrally formed at the bottom end of the axle body (14).

5. The reducer for medical equipment according to claim 4, characterized in that: A second bearing isolator (11) is detachably connected between the shaft head (15) and the housing (1).

6. The reducer for medical equipment according to claim 3, characterized in that: The top of the shaft neck (10) is integrally formed with a shaft shoulder (17), the top of the shaft shoulder (17) is integrally formed with a top column (21), a fourth bearing (18) is interference-fitted on the top column (21), the top of the fourth bearing (18) contacts a second elastic snap ring (19), a second annular groove (103) adapted to the second elastic snap ring (19) is provided in the housing (1), and an end cover (20) is provided on the top column (21).

7. The reducer for medical equipment according to claim 6, characterized in that: A magnetic attraction layer is attached to the outer surface of the end cover (20), and the end cover (20) is magnetically connected to the housing (1).

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