CN217633719U - Buffer type linear push rod - Google Patents
Buffer type linear push rod Download PDFInfo
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- CN217633719U CN217633719U CN202221157743.6U CN202221157743U CN217633719U CN 217633719 U CN217633719 U CN 217633719U CN 202221157743 U CN202221157743 U CN 202221157743U CN 217633719 U CN217633719 U CN 217633719U
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- nut
- screw
- buffer
- screw rod
- push rod
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Abstract
The utility model relates to a linear push rod of buffering formula, include: the screw rod and the nut are partially arranged in the hollow inner tube; wherein the nut is fixedly connected with the inner wall of the hollow inner tube; the screw rod is also connected with a power assembly for driving the screw rod to rotate; and a part of the screw rod, which extends out of the outer side of the hollow inner tube and faces the power assembly, is also sleeved with a buffer part which is suitable for abutting against the screw nut. The utility model discloses can reduce the fault rate of linear push rod operation through preventing that the screw from moving the limit on the lead screw.
Description
Technical Field
The utility model relates to a linear actuator technical field particularly, relates to a linear push rod of buffering formula.
Background
The linear push rod belongs to one of linear drivers, and a lead screw module is adopted in the prior art, namely, the rotation motion is converted into the linear motion by the matching of a lead screw and a nut. For the axial movement of the nut along the screw rod, two limit movement positions exist in the reciprocating movement process of the nut, wherein one position corresponds to the maximum stroke of the linear push rod, and the other position corresponds to the minimum stroke of the linear push rod. And the rotary motion of the screw rod needs to be realized through a driving structure, and in combination with a structure in the prior art, when the screw rod module is switched from the maximum stroke state to the minimum stroke state, the screw nut moves from the side far away from the driving structure to the side close to the driving structure.
In addition, for linear push rods applied in different use environments, the linear push rods can be roughly divided into three different linear push rods, namely a slow speed linear push rod, a medium speed linear push rod and a high speed linear push rod according to specific operation speeds of the linear push rods. For the high-speed linear push rod, the situation that the movement of the nut exceeds the limit can exist, so that the operation fault of the screw rod module can occur, and the service life of the whole linear push rod is shortened.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a linear push rod of buffering formula to solve the technical problem who reduces the fault rate of linear push rod operation.
The utility model discloses a linear push rod of buffering formula is realized like this:
a cushioned linear putter comprising: the screw rod and the nut are partially arranged in the hollow inner tube; wherein
The screw nut is fixedly connected with the inner wall of the hollow inner tube; the screw rod is also connected with a power assembly for driving the screw rod to rotate; and
the part of the screw rod, which extends out of the outer side of the hollow inner tube and faces the power assembly, is also sleeved with a buffer part which is suitable for abutting against the screw nut.
In an alternative embodiment of the present invention, the buffer member includes a collar made of an elastic material; and
the lantern ring is in interference fit with the screw rod.
In an optional embodiment of the present invention, the buffer further comprises a sheath disposed on an outer wall of the collar; wherein
The sheath is including locating the annular body on the circumference lateral wall of the lantern ring and with the baffle that links to each other and be located the lantern ring towards the axial end one side of screw together.
In an alternative embodiment of the present invention, the sheath is an interference fit with the collar.
In an alternative embodiment of the present invention, the sheath is made of a plastic material.
In an optional embodiment of the present invention, the buffer type linear push rod further comprises a control box body connected with the outer wall of the hollow outer tube in a matching manner;
the control box body is provided with a hollow accommodating cavity communicated with the inner cavity of the hollow outer tube; and
the buffer piece is arranged in the accommodating cavity.
In an optional embodiment of the present invention, a bearing body is further disposed between the screw rod and the cavity wall of the accommodating cavity; and
the shaft end of the buffer piece departing from the screw nut is contacted with the shaft end of the bearing body facing the screw nut.
In an alternative embodiment of the present invention, the end surface of the buffer contacting the bearing body is provided with a plurality of grooves arranged in a circumferential array.
In an alternative embodiment of the present invention, a first proximity switch and a second proximity switch for sensing the maximum stroke position and the minimum stroke position of the screw are further disposed on the inner wall of the hollow outer tube at intervals.
Compared with the prior art, the embodiment of the utility model provides a following beneficial effect has: the utility model discloses a linear push rod of buffering formula, stretch out at the cavity inner tube outside and still overlap on the position towards power component through the lead screw and be equipped with the bolster that is suitable for and offsets with the screw for even the screw also can be unlikely to the condition that the screw rushes into the control box because of the backstop of bolster under the too fast condition of velocity of motion appears, that is to say the bolster has played the cushioning effect to the screw motion. Under the structure, the nut can be prevented from moving on the screw rod to be over-limited to reduce the failure rate of the operation of the linear push rod.
Drawings
The present invention will be further explained with reference to the drawings and examples.
Fig. 1 is a schematic view illustrating an overall structure of a buffer type linear push rod according to an embodiment of the present invention;
fig. 2 is a schematic cross-sectional structural diagram illustrating a buffered linear push rod according to an embodiment of the present invention;
fig. 3 shows an enlarged view of a portion a of fig. 2.
In the figure: the device comprises a hollow outer tube 1, a hollow inner tube 2, a screw rod 3, a control box body 4, a nut 5, a columnar embedding part 51, an annular connecting part 52, a lantern ring 61, an annular body 62, a baffle 63, a bearing body 8, a first proximity switch 91 and a second proximity switch 92.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic drawings and illustrate the basic structure of the present invention only in a schematic manner, and thus show only the components related to the present invention.
Referring to fig. 1 to 3, the present embodiment provides a buffered linear putter, including: the device comprises a hollow outer tube 1, a hollow inner tube 2 which is partially arranged in the hollow outer tube 1 and is suitable for linear movement along the length direction of the hollow outer tube 1, and a screw rod 3 and a screw nut 5 which are partially arranged in the hollow inner tube 2; wherein the nut 5 is fixedly connected with the inner wall of the hollow inner tube 2; the screw rod 3 is also connected with a power assembly for driving the screw rod 3 to rotate; and a part of the screw rod 3, which extends out of the hollow inner tube 2 and faces the power assembly, is also sleeved with a buffer part which is suitable for abutting against the screw nut 5.
As an alternative to the above, the buffer of the present embodiment includes a collar 61 made of elastic material; and the lantern ring 61 is in interference fit with the screw rod 3, so that the lantern ring 61 can synchronously rotate along with the screw rod 3. The elastic material here is, for example, but not limited to, rubber. The elastic collar 61 can buffer the impact force when the nut 5 may collide with the collar 61.
On the basis of the above structure, in another optional implementation case, the buffer of this embodiment further includes a sheath disposed on the outer wall of the collar 61; wherein the sheath comprises an annular body 62 provided on the circumferential side wall of the collar 61 and a baffle 63 connected with the annular body 62 and located on the side of the collar 61 toward the axial end of the nut 5. The sheath has an interference fit with the collar 61 so that the sheath can be securely mated with the collar 61. The sheath can be made of plastic materials, the sheath made of the materials can play a role in buffering impact force when the nut 5 possibly collides with the lantern ring 61, and compared with a buffering piece with a single lantern ring 61, the buffering piece with the structure has the advantage of being longer in service life.
Furthermore, it should be noted that the buffer type linear push rod of the present embodiment further includes a control box 4 connected to the outer wall of the hollow outer tube 1 in a matching manner; the control box body 4 is provided with a hollow accommodating cavity which is communicated with the inner cavity of the hollow outer tube 1; and the buffer piece is arranged in the accommodating cavity. For example, in an optional case, a worm wheel for driving the screw rod 3 to rotate is further fixedly arranged in the accommodating cavity and on the screw rod 3, for this purpose, the power assembly adopted in this embodiment is a speed reduction motor connected with a worm, and the worm is in meshed connection with the worm wheel.
On the basis of the structure, it is also necessary to explain that a bearing body 8 is also arranged between the screw rod 3 and the cavity wall of the accommodating cavity; and the bolster deviates from the axle head of screw 5 and the axle head contact of bearing body 8 orientation screw 5, and what contact screw 5 on specific bearing body 8 is the outer lane structure of bearing body 8, and the outer lane structure then links firmly motionless with the inner chamber wall that holds the chamber. On the basis of the structure, it should be noted that, in the normal use process of the buffer type linear push rod of the embodiment, the buffer member can synchronously rotate along with the screw rod 3, and the outer ring of the bearing body 8 contacting with the buffer member does not move along with the rotation of the screw rod 3, so in view of reducing the friction between the buffer member and the bearing body 8, which is generated by the rotation of the buffer member, in an optional implementation case, the following design is made for the structure of the buffer member: that is, the end face of the buffer contacting the bearing body 8 is provided with a plurality of grooves in an array manner along the circumferential direction, and specifically, the shaft end face of the sleeve ring 61 of the buffer departing from the screw nut 5 is provided with a plurality of grooves, so that the contact area between the sleeve ring 61 and the buffer is reduced.
In order to effectively control the stroke track of the screw 5, a first proximity switch 91 and a second proximity switch 92 for sensing the maximum stroke position and the minimum stroke position of the screw 5 are provided at intervals on the inner wall of the hollow outer tube 1. Specifically, the first proximity switch 91 is used for sensing the maximum stroke position of the nut 5, the second proximity switch 92 is used for sensing the minimum stroke position of the nut 5, and the buffer is arranged close to the second proximity switch 92, so that even if the movement speed of the nut 5 is too high, the nut 5 cannot be rushed into the control box 4 due to the stop of the buffer. In more detail, the nut 5 includes a columnar insertion portion 51 inserted into the hollow inner tube 2 to connect the hollow inner tube 2, and an annular connection portion 52 integrally formed with the columnar insertion portion 51 and located outside one axial end of the hollow inner tube 2; the annular connecting portion 52 can be sensed by the first proximity switch 91 and the second proximity switch 92 during the axial movement of the nut 5 along the lead screw 3.
It should be noted that, when the nut 5 is located at the minimum stroke position, the second proximity switch 92 may sense the nut 5, and the nut 5 may not contact the buffer, and only when the movement of the nut 5 exceeds the second proximity switch 92, that is, when the operation of the nut 3 is abnormal, the buffer may contact the nut 5, so as to play a role of resistance to the continuous movement of the nut 5, thereby avoiding the problem of the over-limit movement of the nut 3.
In summary, the part of the screw rod 3 extending outside the hollow inner tube 2 and facing the power assembly is further sleeved with a buffer member adapted to abut against the nut 5, so that even if the movement speed of the nut 5 is too high, the nut 5 will not be rushed into the control box 4 due to the stop of the buffer member, that is, the buffer member has a buffering effect on the movement of the nut 5. With the structure, the nut 5 can be prevented from moving on the screw rod 3 to the over limit to reduce the failure rate of the operation of the linear push rod.
The above embodiments further describe the objects, technical solutions and advantages of the present invention in detail, it should be understood that the above embodiments are only specific embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, and do not indicate or imply that the equipment or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal", "vertical", "suspended" and the like do not imply that the components are absolutely horizontal or suspended, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the present disclosure, unless otherwise expressly stated or limited, the first feature may comprise both the first and second features directly contacting each other, and also may comprise the first and second features not being directly contacting each other but being in contact with each other by means of further features between them. Also, the first feature may be over, above or on the second feature including the first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is at a higher level than the second feature. A first feature that underlies, and underlies a second feature includes a first feature that is directly under and obliquely under a second feature, or simply means that the first feature is at a lesser level than the second feature.
Claims (9)
1. A cushioned linear push rod, comprising: the screw rod and the nut are partially arranged in the hollow inner tube; wherein
The screw nut is fixedly connected with the inner wall of the hollow inner tube; the screw rod is also connected with a power assembly for driving the screw rod to rotate; and
and a buffer part which is suitable for abutting against the screw nut is further sleeved on the part of the screw rod, which extends out of the outer side of the hollow inner tube and faces the power assembly.
2. The buffered linear pushrod of claim 1, wherein the buffer comprises a collar made of an elastomeric material; and
the lantern ring is in interference fit with the screw rod.
3. The buffered linear pushrod of claim 2, wherein the buffer further comprises a sheath disposed on an outer wall of the collar; wherein
The sheath is including locating the annular body on the circumference lateral wall of the lantern ring and with the baffle that links to each other and be located the lantern ring towards the axial end one side of screw together.
4. The buffered linear pushrod of claim 3, wherein the sheath is an interference fit with the collar.
5. The linear damper push rod as in claim 3 or 4, wherein the sheath is made of plastic.
6. The linear push rod of claim 1, further comprising a control box coupled to an outer wall of the hollow outer tube;
the control box body is provided with a hollow accommodating cavity communicated with the inner cavity of the hollow outer tube; and
the buffer piece is arranged in the accommodating cavity.
7. The buffer type linear push rod according to claim 6, characterized in that a bearing body is arranged between the screw rod and the cavity wall of the accommodating cavity; and
the shaft end of the buffer piece departing from the screw nut is contacted with the shaft end of the bearing body facing the screw nut.
8. The buffered linear pushrod of claim 7, wherein the end surface of the buffer contacting the bearing body is formed with a plurality of grooves arranged in a circumferential array.
9. The buffered linear tappet according to claim 1, wherein a first proximity switch and a second proximity switch for sensing a maximum stroke position and a minimum stroke position of the nut are further provided at intervals on the inner wall of the hollow outer tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221157743.6U CN217633719U (en) | 2022-05-13 | 2022-05-13 | Buffer type linear push rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221157743.6U CN217633719U (en) | 2022-05-13 | 2022-05-13 | Buffer type linear push rod |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217633719U true CN217633719U (en) | 2022-10-21 |
Family
ID=83652090
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221157743.6U Active CN217633719U (en) | 2022-05-13 | 2022-05-13 | Buffer type linear push rod |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217633719U (en) |
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2022
- 2022-05-13 CN CN202221157743.6U patent/CN217633719U/en active Active
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