CN217107971U - One-way friction mechanism and lifting push rod - Google Patents
One-way friction mechanism and lifting push rod Download PDFInfo
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- CN217107971U CN217107971U CN202123240541.6U CN202123240541U CN217107971U CN 217107971 U CN217107971 U CN 217107971U CN 202123240541 U CN202123240541 U CN 202123240541U CN 217107971 U CN217107971 U CN 217107971U
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Abstract
The utility model relates to a one-way friction mechanism and lifting push rod, a one-way friction mechanism, including lead screw, friction generation subassembly, bearing baffle, connecting piece, the linkage segment of lead screw upper end is connected with the connecting piece and is realized synchronous rotation, the friction generation subassembly includes friction piece and torsional spring, the up end of friction piece with the baffle lower end face laminating of bearing baffle, the torsional spring inner circle of torsional spring with pass the bearing baffle the axle journal interference suit of connecting piece, the torsion arm embedding of torsional spring is installed in the recess of friction piece; when the connecting piece rotates, the inner ring of the torsion spring and the shaft neck can be in a holding state or a loosening state. The utility model discloses can realize that the connecting piece in the one-way friction mechanism is when certain direction is rotatory, and the whole frictional force of mechanism is great, and its connecting piece is when another direction is rotatory, and the whole frictional force of mechanism is less.
Description
Technical Field
The utility model relates to an one-way friction mechanism and lifting push rod.
Background
The existing lifting table is a lifting table with adjustable height, and the height of the existing lifting table can be adjusted according to the height, sitting posture and standing posture of a person. Most of the existing lifting tables are driven by electricity, and a motor drives a lifting mechanism in table legs to act through a reduction gear, so that the table top can move up and down. At present, consumers put forward higher requirements on the self-locking of the lifting table, the power of the driving motor corresponding to the lifting of the self-locking needs to be increased, and the self-locking table is not practical and practical at present, and in the actual assembly process, the degree of tightness of the table legs can cause the phenomenon that the two table legs are not synchronous, so that the driving torsion for lifting the two table legs tends to be consistent, and the problem that needs to be solved urgently is solved.
The friction resistance that elevating system receives in the inside elevating system of table leg in prior art is unanimous at the in-process that the table leg rises and descends, adopts current scheme, and during the rising, the friction resistance is great, and the desktop load-carrying capacity is lower and complete machine efficiency is lower under the condition of same motor, and when the desktop is static and descend, stability is lower.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is: the defects of the prior art are overcome, and the one-way friction mechanism and the lifting push rod are provided.
The utility model provides a technical scheme that its technical problem adopted is: a one-way friction mechanism comprises a screw rod, a friction generating assembly, a bearing baffle and a connecting piece, wherein a connecting section at the upper end of the screw rod is connected with the connecting piece to realize synchronous rotation, the friction generating assembly comprises a friction piece and a torsional spring, the upper end surface of the friction piece is attached to the lower end surface of the baffle of the bearing baffle, the inner ring of the torsional spring is in interference fit with the shaft neck of the connecting piece penetrating through the bearing baffle, and a torsion arm of the torsional spring is embedded in a groove of the friction piece; when the connecting piece rotates, the inner ring of the torsion spring and the shaft neck can be in a holding state or a loosening state.
Preferably, the rotating direction of the connecting piece is the same as the rotating direction of the inner ring of the torsion spring, and the inner ring of the torsion spring can be in a tightly-holding state with the shaft neck; when the rotating direction of the connecting piece is opposite to the rotating direction of the inner ring of the torsion spring, the inner ring of the torsion spring can be in a loosening state with the shaft neck.
Preferably, when the inner ring of the torsion spring is in a holding state with the journal and the friction force F1 between the torsion spring and the connecting piece is greater than the friction force F2 between the friction piece and the bearing baffle, the friction piece and the bearing baffle rotate relatively; when the inner ring of the torsion spring and the shaft neck are in a holding state and the friction force F1 between the torsion spring and the connecting piece is smaller than the friction force F2 between the friction piece and the bearing baffle, the torsion spring and the connecting piece rotate relatively.
Preferably, when the inner ring of the torsion spring is in a loose state with the shaft journal, the friction force is generated between the connecting piece and the bearing baffle.
Preferably, the friction piece comprises a shell and an upper friction plate positioned at the upper end of the shell, and the upper end surface of the upper friction plate is attached to the lower end surface of the baffle of the bearing baffle.
Preferably, the friction piece includes the casing, be equipped with hole, well hole, lower hole in the casing of friction piece, it is formed with first step face with well hole to go up the hole, well hole and lower hole are formed with second step face, the torsional spring inner circle of torsional spring is located the vestibule of well hole, the recess is located the pore wall of well hole, install the bearing in the vestibule of hole down, the bearing up end and the laminating of second step face of bearing.
Preferably, the hole wall of the lower inner hole is provided with a plurality of convex edges, and the end surface of the bearing outer ring of the bearing is attached to the inner end surface of the convex edges.
Preferably, the upper part of the shaft neck of the connecting piece is provided with a connecting end, the joint of the shaft neck and the connecting end is provided with a transverse extending part, the lower end surface of the transverse extending part is provided with a convex ring, and the lower end surface of the convex ring is attached to the upper end surface of the baffle plate of the bearing baffle plate.
Preferably, the one-way friction mechanism further comprises a gasket, a shaft shoulder is formed at the joint of the thread section and the connecting section of the screw rod, the lower end face of the gasket is attached to the shaft shoulder, and the lower end face of the bearing is attached to the upper end face of the gasket.
Preferably, the linkage segment of lead screw is equipped with the external splines, the hole of journal be equipped with external splines complex internal splines, the journal passes the baffle centre bore of bearing baffle, the internal splines of journal with the external splines cooperation of lead screw is connected, the upper end of the linkage segment of lead screw has the lead screw end, the lead screw end and the fastener threaded connection of lead screw.
A lifting push rod comprises the one-way friction mechanism. The lifting push rod comprises a motor, and the motor drives the connecting piece of the one-way friction mechanism to rotate through the gear assembly.
The utility model has the advantages that: when the inner ring of the torsion spring and the shaft neck are in a holding state, and the friction force F1 between the torsion spring and the connecting piece is greater than the friction force F2 between the friction piece and the bearing baffle, the friction piece and the bearing baffle rotate relatively, the total friction force is equal to the sum of the friction force F2 between the friction piece and the bearing baffle and the friction force F3 between the connecting piece and the bearing baffle, namely F is F3+ F2; when the inner ring of the torsion spring is in a tightly holding state with the journal, and the friction force F1 between the torsion spring and the connecting piece is smaller than the friction force F2 between the friction piece and the bearing baffle, the torsion spring and the connecting piece rotate relatively, the total friction force is equal to the sum of the friction force F1 between the torsion spring and the connecting piece and the friction force F between the connecting piece and the bearing baffle, namely F3+ F1; according to the switching of the two independent lifting push rods between F1 and F2, the total friction force of the two independent lifting push rods tends to be consistent.
When the inner ring of the torsion spring and the journal are in an unclamped state, the overall friction force of the friction mechanism is mainly the friction force F3 between the connecting piece and the bearing baffle, and obviously, F3 is smaller than any one of F3+ F1 or F3+ F2. Therefore, when the one-way friction mechanism rotates in one direction, the whole friction force of the mechanism is larger, and when the connecting piece rotates in the other direction, the whole friction force of the mechanism is smaller.
Drawings
The present invention will be further described with reference to the accompanying drawings and embodiments.
Fig. 1 is an exploded schematic view of the one-way friction mechanism of the present invention;
fig. 2 is an exploded schematic view of another perspective of the one-way friction mechanism of the present invention;
FIG. 3 is a front view of the one-way friction mechanism of the present invention;
FIG. 4 is a schematic cross-sectional view of FIG. 3;
fig. 5 is a partial perspective cross-sectional view of the one-way friction mechanism of fig. 3;
FIG. 6 is a schematic structural view of the friction member of the present invention;
FIG. 7 is a schematic structural view of a lift ram incorporating the present one-way friction mechanism;
wherein: 1. a fastener member for fastening the fastener member to the body,
2. a connecting piece 201, a connecting end 202, a shaft neck 203 and a convex ring;
3. a bearing baffle plate 301, a baffle plate lower end face 302, a baffle plate upper end face 303 and a baffle plate central hole,
4. the friction piece 401, the shell 402, the upper friction plate 403, the upper inner hole 404, the middle inner hole 405, the lower inner hole 406, the first step surface 407, the second step surface 408, the groove 409 and the convex rib,
5. a torsion spring 501, a torsion spring inner ring 502, a torsion arm,
6. bearing 601, lower end surface of bearing 602, upper end surface of bearing 603, end surface of bearing outer ring,
7. a gasket 701, a gasket lower end face, 702, a gasket upper end face,
8. the screw rod 801, the thread section 802, the connecting section 803, the screw rod end 804 and the shaft shoulder;
9. a motor box.
Detailed Description
The invention will now be further described with reference to the accompanying drawings. The drawings are simplified schematic diagrams only illustrating the basic structure of the present invention in a schematic manner, and thus show only the components related to the present invention.
As shown in fig. 1 to 6, a one-way friction mechanism includes a screw 8, a friction generating assembly, a bearing baffle 3, and a connecting piece 2, wherein a connecting section 802 at the upper end of the screw 8 is connected with the connecting piece 2 to realize synchronous rotation, the friction generating assembly includes a friction piece 4 and a torsion spring 5, the upper end surface of the friction piece 4 is attached to a baffle lower end surface 301 of the bearing baffle 3, a torsion spring inner ring 501 of the torsion spring 5 is in interference fit with a journal 202 of the connecting piece 2 passing through the bearing baffle 3, and a torsion arm 502 of the torsion spring 5 is embedded in a groove 408 of the friction piece 4; when the connecting element 2 rotates, the inner ring 501 of the torsion spring can be in a holding state or a releasing state with the journal 202.
The rotating direction of the connecting piece 2 is the same as the rotating direction of the torsion spring inner ring 501, and the torsion spring inner ring 501 and the shaft neck 202 can be in a tightly-holding state; when the rotation direction of the connecting element 2 is opposite to the rotation direction of the torsion spring inner ring 501, the torsion spring inner ring 501 and the journal 202 can be in a loosening state.
When the inner ring 501 of the torsion spring and the journal 202 are in a tightly clasped state, a large friction force can be generated between the inner ring 501 of the torsion spring and the journal 202, and when the friction force F1 between the torsion spring 5 and the connecting piece 2 is greater than the friction force F2 between the friction piece 4 and the bearing baffle 3, the friction piece 4 and the bearing baffle 3 rotate relatively. At this time, the total friction force F of the friction mechanism mainly includes the friction force F2 between the friction piece 4 and the bearing baffle plate 3 and the friction force F3 between the bearing baffle plate 3 and the connecting piece 2, that is, F2+ F3, and the friction forces between other components are supplementary to the overall friction force of the friction mechanism and are not taken into account;
when the inner ring 501 of the torsion spring and the journal 202 are in a tightly clasped state, the friction member 4 and the bearing baffle 3 can generate a large friction force, and when the friction force F1 between the torsion spring 5 and the connecting member 2 is smaller than the friction force F2 between the friction member 4 and the bearing baffle 3, the torsion spring 5 and the connecting member 2 rotate relatively. At this time, the total friction force F of the friction mechanism mainly includes the friction force F1 between the torsion spring 5 and the connecting piece 2 and the friction force F3 between the bearing baffle 3 and the connecting piece 2, that is, F1+ F3, and the friction forces between other components are supplementary to the overall friction force of the friction mechanism and are ignored;
when the torsion spring inner ring 501 and the shaft journal 202 are in an unclamped state, the friction member 4 and the bearing baffle 3 are relatively stationary. At this time, the total frictional force of the friction mechanism is mainly the frictional force F3 between the bearing shield 3 and the link 2, that is, F3, and the frictional force between the other components is a supplement to the total frictional force of the friction mechanism and is not taken into account. At this time, the total friction force of the friction mechanism is smaller than the overall friction force of the friction mechanism when the torsion spring inner ring 501 and the journal 202 are in a clasping state.
The friction member 4 includes a housing 401 and an upper friction plate 402 located at the upper end of the housing 401, and the upper end surface of the upper friction plate 402 is attached to the baffle lower end surface 301 of the bearing baffle 3. The upper end surface of the upper friction plate 402 and the lower end surface 301 of the baffle plate can generate a certain friction force.
As shown in fig. 6, an upper inner hole 403, a middle inner hole 404 and a lower inner hole 405 are arranged in the housing 401 of the friction member 4, a first step surface 406 is formed between the upper inner hole 403 and the middle inner hole 404, a second step surface 407 is formed between the middle inner hole 404 and the lower inner hole 405, the torsion spring inner ring 501 of the torsion spring 5 is located in the bore of the middle inner hole 404, the groove 408 is located on the hole wall of the middle inner hole 404, a bearing 6 is installed in the bore of the lower inner hole 405, and the bearing upper end surface 602 of the bearing 6 is attached to the second step surface 407.
The hole wall of the lower inner hole 405 is provided with a plurality of convex ribs 409, and the bearing outer ring end surface 603 of the bearing 6 is attached to the inner end surfaces of the convex ribs 409.
The upper part of the shaft neck 202 of the connecting piece 2 is provided with a connecting end 201, the joint of the shaft neck 202 and the connecting end 201 is provided with a transverse extension part, the lower end surface of the transverse extension part is provided with a convex ring 203, and the lower end surface of the convex ring 203 is attached to the baffle upper end surface 302 of the bearing baffle 3. A certain friction force can be generated between the lower end surface of the convex ring 203 and the baffle upper end surface 302 of the bearing baffle 3.
The one-way friction mechanism further comprises a gasket 7, a shaft shoulder 804 is formed at the joint of the thread section 801 and the connecting section 802 of the screw rod 8, the lower end face 701 of the gasket 7 is attached to the shaft shoulder 804, and the lower end face 601 of the bearing 6 is attached to the upper end face 702 of the gasket 7.
The connecting section 802 of the screw rod 8 is provided with an external spline, an inner hole of the journal 202 is provided with an internal spline matched with the external spline, the journal 202 penetrates through the baffle center hole 303 of the bearing baffle 3, the internal spline of the journal 202 is matched and connected with the external spline of the screw rod 8, the upper end part of the connecting section 802 of the screw rod 8 is provided with a screw rod end 803, and the screw rod end 803 of the screw rod 8 is in threaded connection with the fastener 1.
As shown in fig. 7, the lifting push rod comprises the one-way friction mechanism. And a bearing baffle 3 of the one-way friction mechanism is fixedly arranged with a motor box 9. A motor of the lifting push rod drives a connecting piece 2 of the one-way friction mechanism to rotate through a gear assembly, the connecting piece 2 drives a screw rod 8 to synchronously rotate, a screw rod sliding block matched with the screw rod 8 in the lifting push rod can move up and down, and then a lifting part connected with the screw rod sliding block can move up and down.
When the tabletop of the lifting table rises, the motor of the lifting push rod drives the connecting piece 2 of the one-way friction mechanism to rotate through the gear assembly, the connecting piece 2 and the bearing baffle 3 generate friction, meanwhile, the connecting piece 2 drives the screw rod 8 to synchronously rotate, the gasket 7 rotates along with the screw rod 8, and the bearing 6 is further arranged between the gasket 7 and the friction piece 4, so that the friction piece 4 is not influenced by the rotation of the gasket 7. At this moment, the rotating direction of the connecting piece 2 is opposite to the rotating direction of the torsion spring inner ring 501, the diameter of the torsion spring inner ring 501 is increased, the torsion spring inner ring 501 and the shaft neck 202 are in a loosening state, the friction force between the torsion spring and the connecting piece 2 can be almost ignored, the torsion spring 5 does not rotate along with the connecting piece 2, and the friction piece 4 and the bearing baffle 3 are relatively static. Therefore, the friction resistance is mainly the friction between the connecting member 2 and the bearing shield 3 when the elevating table is lifted.
At the lift table complete machine static, when there is certain load in the desktop of lift table, lead screw 8 has the trend of reversal, it has the reversal trend to drive connecting piece 2, the rotation direction of connecting piece 2 is the same with the rotation direction of torsional spring 5, the internal diameter of torsional spring 5 diminishes, be the state of hugging closely between torsional spring 5 and the connecting piece 2, and frictional force increase each other, it has the rotation trend to drive friction piece 4 through torsional spring 5's torsion arm 502, and then there is relative motion between messenger friction piece 4 and the bearing baffle 3, produce certain frictional force, thereby desktop load-carrying capacity when improving static.
The desktop at the lift table descends, when there is certain load in the desktop, it is the same with the above-mentioned static trend that there is the reversal of lead screw 8 that exists of lift table complete machine, the direction of rotation of connecting piece 2 is the same with the direction of rotation of torsional spring 5, the internal diameter of torsional spring 5 diminishes, be the state of holding tightly between torsional spring 5 and connecting piece 2, and frictional force increases, it has the trend of rotating to drive friction piece 4 through torsional spring 5's torsion arm 502, and then there is relative motion between friction piece 4 and the bearing baffle 3, produce certain frictional force, and at the in-process that descends, frictional force between torsional spring 5 and connecting piece 2 and the frictional force between friction piece 4 and the bearing baffle 3 can be played by the smaller person, thereby make the frictional resistance of two table legs of lift table tend to unanimity, and then improve the stability when lift table descends.
The utility model discloses low cost, the installation is succinct, and the structure is reliable, does not have complicated mechanisms such as upset, compress tightly, has avoided the not enough risk of reliability that the structure is complicated to produce.
The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and the protection scope of the present invention should not be limited thereby, and all equivalent changes or modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.
Claims (10)
1. A one-way friction mechanism is characterized in that: the friction-type friction bearing comprises a screw rod (8), a friction generating assembly, a bearing baffle (3) and a connecting piece (2), wherein a connecting section (802) at the upper end of the screw rod (8) is connected with the connecting piece (2) to realize synchronous rotation, the friction generating assembly comprises a friction piece (4) and a torsion spring (5), the upper end surface of the friction piece (4) is attached to the lower end surface (301) of the baffle of the bearing baffle (3), a torsion spring inner ring (501) of the torsion spring (5) is in interference fit with a shaft neck (202) of the connecting piece (2) penetrating through the bearing baffle (3), and a torsion arm (502) of the torsion spring (5) is embedded in a groove (408) of the friction piece (4); when the connecting piece (2) rotates, the inner ring (501) of the torsion spring can be in a holding state or a loosening state with the journal (202).
2. A one-way friction mechanism according to claim 1, wherein: the rotating direction of the connecting piece (2) is the same as that of the torsion spring inner ring (501), and the torsion spring inner ring (501) can be in a tightly-holding state with the journal (202); when the rotating direction of the connecting piece (2) is opposite to the rotating direction of the torsion spring inner ring (501), the torsion spring inner ring (501) can be in a loosening state with the shaft neck (202).
3. A one-way friction mechanism according to claim 1, wherein: the friction piece (4) comprises a shell (401) and an upper friction plate (402) located at the upper end of the shell (401), and the upper end face of the upper friction plate (402) is attached to the lower end face (301) of the bearing baffle (3).
4. A one-way friction mechanism according to claim 1, wherein: friction piece (4) include casing (401), be equipped with in casing (401) of friction piece (4) and go up hole (403), well hole (404), lower hole (405), it is formed with first step face (406) with well hole (404) to go up hole (403), well hole (404) are formed with second step face (407) with lower hole (405), torsion spring inner circle (501) of torsion spring (5) are located the vestibule of well hole (404), recess (408) are located the pore wall of well hole (404), install bearing (6) in the vestibule of hole (405) down, bearing up end (602) and the laminating of second step face (407) of bearing (6).
5. A one-way friction mechanism according to claim 4, wherein: the pore wall of hole (405) has a plurality of bead (409) down, the laminating of bearing inner race terminal surface (603) and the interior terminal surface of bead (409) of bearing (6).
6. A one-way friction mechanism according to claim 1, wherein: the upper portion of the shaft neck (202) of the connecting piece (2) is provided with a connecting end head (201), the joint of the shaft neck (202) and the connecting end head (201) is provided with a transverse extending portion, the lower end face of the transverse extending portion is provided with a convex ring (203), and the lower end face of the convex ring (203) is attached to the upper end face (302) of the bearing baffle (3).
7. A one-way friction mechanism according to claim 4, wherein: the screw rod is characterized by further comprising a gasket (7), a shaft shoulder (804) is formed at the joint of the screw thread section (801) and the connecting section (802) of the screw rod (8), the lower gasket end face (701) of the gasket (7) is attached to the shaft shoulder (804), and the lower bearing end face (601) of the bearing (6) is attached to the upper gasket end face (702) of the gasket (7).
8. A one-way friction mechanism according to claim 1, wherein: the connecting section (802) of lead screw (8) is equipped with the external splines, the hole of journal (202) be equipped with external splines complex internal splines, the baffle centre bore (303) of bearing baffle (3) are passed in journal (202), the internal splines of journal (202) with the external splines cooperation of lead screw (8) is connected, the upper end of connecting section (802) of lead screw (8) has lead screw end (803), lead screw end (803) and fastener (1) threaded connection of lead screw (8).
9. A lifting push rod is characterized in that: comprising a one-way friction mechanism according to any one of claims 1 to 8.
10. The lifting pushrod of claim 9 wherein: the one-way friction mechanism comprises a motor, wherein the motor drives a connecting piece (2) of the one-way friction mechanism to rotate through a gear assembly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123240541.6U CN217107971U (en) | 2021-12-21 | 2021-12-21 | One-way friction mechanism and lifting push rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123240541.6U CN217107971U (en) | 2021-12-21 | 2021-12-21 | One-way friction mechanism and lifting push rod |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217107971U true CN217107971U (en) | 2022-08-02 |
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ID=82589789
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123240541.6U Active CN217107971U (en) | 2021-12-21 | 2021-12-21 | One-way friction mechanism and lifting push rod |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217107971U (en) |
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2021
- 2021-12-21 CN CN202123240541.6U patent/CN217107971U/en active Active
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