CN215257487U - Linear actuator prevents tong mechanism and linear actuator - Google Patents
Linear actuator prevents tong mechanism and linear actuator Download PDFInfo
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- CN215257487U CN215257487U CN202023338911.5U CN202023338911U CN215257487U CN 215257487 U CN215257487 U CN 215257487U CN 202023338911 U CN202023338911 U CN 202023338911U CN 215257487 U CN215257487 U CN 215257487U
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Abstract
The utility model discloses a hand mechanism and linear actuator are prevented pressing from both sides by linear actuator, belong to linear actuator technical field, linear actuator prevents pressing from both sides hand mechanism and includes the gear, the lead screw, first connecting piece, second connecting piece and torsional spring, first connecting piece includes canned paragraph and free section, the relative gear circumference of canned paragraph of first connecting piece is fixed, the relative lead screw circumference of second connecting piece is fixed, the torsional spring both ends are looped respectively and elasticity is compelled tightly on the free section and the second connecting piece of first connecting piece, the direction of screwing of torsional spring is unanimous with the corotation direction of gear, produce reversal torque when the gear reverses, the torsional spring expands outward, part reversal torque passes through the torsional spring and transmits to the second connecting piece, part reversal torque is greater than required minimum driving torque when linear actuator unloaded the withdrawal, utilize the characteristic of the unidirectional transmission moment of torsion of torsional spring to realize preventing pressing from both sides the hand function, required part is few, The ratchet wheel and pawl combined device has the advantages of low cost, simple structure and convenience in assembly, and effectively avoids noise generated by continuous collision in the working process of the ratchet wheel and the pawl.
Description
[ technical field ] A method for producing a semiconductor device
The utility model relates to a linear actuator technical field, concretely relates to linear actuator prevents tong mechanism and linear actuator.
[ background of the invention ]
A linear driver, also known as an electric push rod, mainly comprises a novel linear actuating mechanism consisting of mechanisms such as an electric push rod, a control device and the like, can be considered as an extension of a rotating motor in the aspect of the mechanism, and comprises a driving motor, a screw rod, a fixed pipe fixed relative to the outside and a push rod extending in the fixed pipe, wherein the front end of the fixed pipe is provided with an end cover, the front end of the push rod is provided with a front pull, the linear driver drives the screw rod to continuously rotate reversely in an idle-load descending process, the screw rod drives the push rod to continuously descend, when a person is relatively close to or holds an inner pipe, the hand is injured by being clamped, the linear driver with the hand clamping prevention function in the market at present adopts the characteristic of unidirectional torque transmission similar to a ratchet mechanism to realize the hand clamping prevention function, the structure has the defects that the number of parts required for realizing the function is large, the structure is complex, and when the hand clamping prevention function is realized, the ratchet wheel and the pawl can generate continuous collision noise.
[ Utility model ] content
An object of the utility model is to design a straight line driver prevents tong mechanism, can solve above-mentioned technical problem partially at least.
In order to solve the technical problem, the utility model adopts the following technical scheme:
the utility model provides a hand mechanism is prevented pressing from both sides by sharp driver, includes gear, lead screw, first connecting piece, second connecting piece and torsional spring, first connecting piece includes canned paragraph and free section, the canned paragraph of first connecting piece is relative gear circumference is fixed, the second connecting piece is relative lead screw circumference is fixed, the torsional spring both ends are encircled respectively and elasticity is compeled tightly on the free section and the second connecting piece of first connecting piece, the direction of screwing of torsional spring is unanimous with the corotation direction of gear, produce reversal torque when the gear reversal, the torsional spring expands outward, and partial reversal torque passes through torsional spring transmission to second connecting piece, partial reversal torque slightly is greater than required minimum driving torque when the unloaded withdrawal of sharp driver.
The beneficial effect of this scheme of adoption:
adopt the utility model provides a prevent tong mechanism, when the linear actuator stretches out, gear corotation produces the forward moment of torsion, drive the synchronous corotation of first connecting piece, the free section outside and the torsional spring inboard of first connecting piece have relative motion, because the direction of screwing of torsional spring is unanimous with the corotation direction of gear, first frictional force between the two makes the torsional spring inwards hold the free section more tightly more, simultaneously, the torsional spring other end also holds the second connecting piece more tightly, finally connect first connecting piece and second connecting piece into a whole through the torsional spring, thereby pass through the torsional spring and all transmit the forward moment of torsion to the second connecting piece, the second connecting piece is all transmitted the moment of torsion to the lead screw again, finally realize the function of stretching out of linear actuator; when the linear driver retracts normally in no-load, the gear rotates reversely and generates reverse torque to drive the first connecting piece to rotate reversely synchronously, the outer side of the free section of the first connecting piece and the inner side of the torsion spring move relatively, the torsion spring expands outwards due to the friction force between the torsion spring and the gear, the inner side of the torsion spring releases the free section, but a second friction force exists between the inner side of the torsion spring and the outer side of the free section, although the second friction force is far smaller than the first friction force, the torsion spring can still be driven to rotate, the first connecting piece transmits partial reverse torque to the second connecting piece through the torsion spring, the partial reverse torque is slightly larger than the minimum driving torque required by the linear driver when retracting in no-load, the linear driver retracts normally, but when a hand or other parts of a human body are clamped between the end cover and the pull head, the minimum driving torque required by the linear driver retracting is increased, at the moment, the partial reverse torque is smaller than the minimum driving torque, the screw rod stops rotating, the free section and the torsion spring slip, and the linear driver stops and does not retract at the free section to achieve the anti-pinch function.
The utility model discloses a prevent tong mechanism utilizes the characteristic of the one-way transmission moment of torsion of torsional spring to realize preventing tong function, can guarantee the normal operation of linear actuator when accessible again, has the ratchet in prior art and prevents tong mechanism relatively, the utility model discloses prevent that the required part of tong mechanism is few, with low costs, simple structure, the assembly of being convenient for have effectively avoided the noise that continuous collision produced in ratchet, the pawl working process.
Preferably, the fixed section of the first connecting piece is connected with the gear through one of interference fit, a key groove structure, a clamping structure and a flat connecting structure.
Preferably, the fixed section of the first connecting piece is connected with the gear through a spline, the fixed section is provided with an external spline, the gear comprises a gear inner hole, and an internal spline matched with the external spline is arranged in the gear inner hole.
Preferably, the fixed section of the first connecting piece and the gear are integrally formed.
Preferably, the second connecting piece is connected with the screw rod through one of interference fit, a key groove structure, a clamping structure and a flat connecting structure.
Preferably, the first connecting piece and the second connecting piece are sequentially sleeved at the tail end of the screw rod and are arranged side by side, the first connecting piece comprises a through hole, and the screw rod freely rotates in the through hole.
The utility model discloses an another technical scheme as follows:
the utility model provides a linear actuator, includes fixed pipe that driving motor, motor casing, relative motor casing are fixed and at the intraductal telescopic push rod of fixed, the front end of fixed pipe is equipped with the end cover, the front end of push rod is equipped with preceding the drawing, still includes among the above-mentioned arbitrary technical scheme linear actuator prevent tong mechanism, driving motor include with gear engagement's output shaft, the lead screw rotates and drives the push rod is flexible.
These features and advantages of the present invention will be disclosed in more detail in the following detailed description and the accompanying drawings.
[ description of the drawings ]
The utility model is further described with the following drawings:
fig. 1 is a partial cross-sectional view of the linear actuator of the present invention.
Fig. 2 is an enlarged view of a portion a in fig. 1.
Fig. 3 is the explosion schematic diagram of the anti-pinch mechanism of the linear actuator of the present invention.
Reference numerals: a screw rod 1; a gear 2; an internal spline 201; a first connecting member 3; a fixed segment 301; an external spline 301 a; a free segment 302; a perforation 303; a torsion spring 4; a second connecting member 5; a motor housing 001; a fixed tube 002; a push rod 003; a front pull 004; end cap 005.
[ detailed description ] embodiments
The technical solutions of the embodiments of the present invention are explained and explained below with reference to the drawings of the embodiments of the present invention, but the embodiments described below are only preferred embodiments of the present invention, and not all embodiments. Based on the embodiments in the embodiment, other embodiments obtained by those skilled in the art without any creative work belong to the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, unless otherwise specified, "a plurality" means two or more unless explicitly defined otherwise.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. 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 present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
The first embodiment is as follows:
as shown in fig. 1 to 3, a finger-pinch prevention mechanism of a linear actuator includes a gear 2, a screw rod 1, a first connecting member 3, a second connecting member 5 and a torsion spring 4, wherein the first connecting member 3 includes a fixed section 301 and a free section 302, the fixed section 301 of the first connecting member 3 is circumferentially fixed with respect to the gear 2, the second connecting member 5 is circumferentially fixed with respect to the screw rod 1, two ends of the torsion spring 4 are respectively annularly arranged and elastically and tightly pressed on the free section 302 of the first connecting member 3 and the second connecting member 5, a screwing direction of the torsion spring 4 is consistent with a forward rotation direction of the gear 2, the gear 2 generates a reverse rotation torque when rotating reversely, the torsion spring 4 expands outwards, a part of the reverse rotation torque is transmitted to the second connecting member 5 through the torsion spring 4, and the part of the reverse rotation torque is slightly larger than a minimum driving torque required when the linear actuator retracts in an idle load.
Adopt the utility model provides a prevent tong mechanism, when the linear actuator stretches out, 2 corotation of gear and production forward moment of torsion, the arrow point direction in fig. 2 is the corotation direction, drive the synchronous corotation of first connecting piece 3, the free section 302 outside and the 4 inboard relative motion of torsional spring of first connecting piece 3, because the direction of screwing of torsional spring 4 is unanimous with the corotation direction of gear 2, first frictional force between the two makes torsional spring 4 inwards hold tightly free section 302 more, simultaneously, the second connecting piece 5 is also held tightly more to the other end of torsional spring 4, finally connect first connecting piece 3 and second connecting piece 5 into a whole through torsional spring 4, thereby transmit forward moment of torsion to second connecting piece 5 entirely through torsional spring 4, second connecting piece 5 transmits the whole lead screw 1 of moment of torsion again, finally realize the function of stretching out of linear actuator; when the linear driver normally retracts in an idle state, the gear 2 rotates reversely to generate a reverse torque to drive the first connecting piece 3 to synchronously rotate reversely, the outer side of the free section 302 of the first connecting piece 3 and the inner side of the torsion spring 4 have relative motion, because the screwing direction of the torsion spring 4 is opposite to the reverse direction of the gear 2, the friction force between the two causes the torsion spring 4 to expand outwards, the inner side of the torsion spring 4 releases the free section 302, but a second friction force exists between the inner side of the torsion spring 4 and the outer side of the free section 302, although the second friction force is far smaller than the first friction force, the torsion spring 4 can still be driven to rotate, the first connecting piece 3 transmits a part of the reverse torque to the second connecting piece 5 through the torsion spring 4, the part of the reverse torque is slightly larger than the minimum driving torque required by the linear driver when the linear driver retracts in the idle state, but when a hand or other parts of a human body are clamped between the end cover 005 and the pull head, the minimum driving torque required by retraction of the linear driver is increased, at the moment, the partial reverse torque is smaller than the minimum driving torque, the screw rod 1 stops rotating, the free section 302 and the torsion spring 4 slip, and the linear driver stops and does not retract at the position, so that the anti-pinch function is realized.
The utility model discloses a prevent tong mechanism utilizes the characteristic of 4 one-way transmission moments of torsion springs to realize preventing tong function, can guarantee the normal operation of linear actuator when the barrier-free thing again, has the ratchet in prior art and prevents tong mechanism relatively, the utility model discloses prevent that the required part of tong mechanism is few, with low costs, simple structure, the assembly of being convenient for have effectively avoided the noise that the continuous collision produced in ratchet, the pawl working process.
In this embodiment, the order of assembling each part of the anti-pinch mechanism is, first connecting piece 3 and second connecting piece 5 are overlapped in proper order along the axial direction and are established at 1 tail end of lead screw and set up side by side, first connecting piece 3 is in the front, second connecting piece 5 is in the back, first connecting piece 3 is including perforating 303, lead screw 1 is free rotation in perforating 303, free section 302 of first connecting piece 3 is closer to second connecting piece 5 relative to fixed section 301, 4 rings of torsional spring are established and elasticity is pressed tightly on free section 302 and second connecting piece 5, 2 covers of gear are established on fixed section 301 of first connecting piece 3.
In this embodiment, in order to realize that first connecting piece 3 rotates along with gear 2 is synchronous, in order to transmit the moment of torsion of gear 2 for first connecting piece 3 entirely, in order to make things convenient for mould and assembly, fixed section 301 and gear 2 of first connecting piece 3 adopt the components of a whole that can function independently setting, through interference fit, the keyway structure, the joint structure, one of them in the flat position connection structure is connected, preferred spline coupling, concrete connection mode is equipped with external splines 301a for fixed section 301, gear 2 includes the gear hole, gear hole pore wall is equipped with and connects with external splines 301a complex internal splines 201, it is more even to make circumferential force transfer through spline coupling, reduce stress concentration, bear load bigger.
Of course, the first connecting member 3 and the gear 2 may also be integrally formed, in which case the fixed section 301 is a part of the gear 2, and the rear end of the gear 2 is further provided with a protrusion as a free section 302 engaged with the torsion spring 4.
In this embodiment, in order to realize that the second connecting member 5 is circumferentially fixed relative to the screw rod 1, so that the second connecting member 5 drives the screw rod 1 to synchronously rotate, the second connecting member 5 is connected with the screw rod 1 through one of an interference fit, a key groove structure, a clamping structure and a flat connecting structure.
Example two:
as shown in fig. 1, a linear actuator, including driving motor, motor casing 001, the fixed pipe 002 fixed relative to motor casing 001 and the push rod 003 of stretching out and drawing back in fixed pipe 002, the front end of fixed pipe 002 is equipped with end cover 005, the front end of push rod 003 is equipped with preceding 004 of pulling back, still include the above-mentioned embodiment linear actuator prevent tong mechanism, driving motor includes the output shaft with gear 2 meshing, lead screw 1 rotates and drives push rod 003 flexible.
The above description is only for the embodiments of the present invention, but the scope of the present invention is not limited thereto, and those skilled in the art should understand that the present invention includes but is not limited to the description in the above embodiments and the accompanying drawings. Any modification which does not depart from the functional and structural principles of the invention is intended to be included within the scope of the claims.
Claims (7)
1. The utility model provides a hand mechanism is prevented pressing from both sides by sharp driver, a serial communication port, including gear, lead screw, first connecting piece, second connecting piece and torsional spring, first connecting piece includes canned paragraph and free section, the canned paragraph of first connecting piece is relative gear circumference is fixed, the second connecting piece is relative lead screw circumference is fixed, the torsional spring both ends are encircleed respectively and elasticity is compeled tightly on the free section and the second connecting piece of first connecting piece, the direction of screwing of torsional spring is unanimous with the corotation direction of gear, produce reversal torque during the gear reversal, the torsional spring expands outward, and partial reversal torque passes through torsional spring transmission to second connecting piece, partial reversal torque is greater than required minimum driving torque when sharp driver no-load retracts.
2. The linear actuator anti-pinch mechanism according to claim 1, wherein the fixed section of the first connecting piece is connected with the gear through one of interference fit, a key groove structure, a clamping structure and a flat connecting structure.
3. The linear actuator anti-pinch mechanism according to claim 2, wherein the fixed section of the first connecting piece is connected with the gear through a spline, the fixed section is provided with an external spline, the gear comprises a gear inner hole, and an internal spline matched with the external spline is arranged in the gear inner hole.
4. The linear actuator pinch resistant mechanism of claim 1, wherein the fixed section of the first link is integrally formed with the gear.
5. The linear actuator anti-pinch mechanism according to claim 1, wherein the second connecting piece is connected with the screw rod through one of interference fit, a key groove structure, a clamping structure and a flat connecting structure.
6. The linear actuator hand-clamping prevention mechanism as claimed in claim 1, wherein the first connecting piece and the second connecting piece are sequentially sleeved at the tail end of the screw rod and arranged side by side, the first connecting piece comprises a through hole, and the screw rod freely rotates in the through hole.
7. A linear actuator, includes driving motor, motor casing, the fixed pipe of relative motor casing fixed and the push rod of stretching out and drawing back in the fixed pipe, the front end of fixed pipe is equipped with the end cover, the front end of push rod is equipped with the front-pull, its characterized in that still includes in any claim 1 ~ 6 linear actuator prevent tong mechanism, driving motor include with gear engagement's output shaft, the lead screw rotates and drives the push rod is flexible.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023338911.5U CN215257487U (en) | 2020-12-31 | 2020-12-31 | Linear actuator prevents tong mechanism and linear actuator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023338911.5U CN215257487U (en) | 2020-12-31 | 2020-12-31 | Linear actuator prevents tong mechanism and linear actuator |
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| CN215257487U true CN215257487U (en) | 2021-12-21 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023245770A1 (en) * | 2022-06-21 | 2023-12-28 | 东莞市本末科技有限公司 | Power accumulation device and electric motor |
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2020
- 2020-12-31 CN CN202023338911.5U patent/CN215257487U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023245770A1 (en) * | 2022-06-21 | 2023-12-28 | 东莞市本末科技有限公司 | Power accumulation device and electric motor |
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