CN214603103U - Linear driving mechanism with unlimited stroke - Google Patents
Linear driving mechanism with unlimited stroke Download PDFInfo
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- CN214603103U CN214603103U CN202120994976.0U CN202120994976U CN214603103U CN 214603103 U CN214603103 U CN 214603103U CN 202120994976 U CN202120994976 U CN 202120994976U CN 214603103 U CN214603103 U CN 214603103U
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Abstract
The utility model discloses a linear driving mechanism with unlimited stroke, which comprises a mobile station, a first passive screw rod and a second passive screw rod which are fixedly arranged at the lower end of the mobile station, an active screw rod meshed with the first passive screw rod and the second passive screw rod, and a motor module used for driving the active screw rod to rotate, wherein the external thread directions of the first passive screw rod and the second passive screw rod are the same, the external thread directions of the active screw rod and the first passive screw rod are opposite, and the motor module is arranged on a frame; after the motor module drives the driving screw to rotate, the driving screw is arranged on the first and second passive screws to perform front and rear spiral linear movement, so as to drive the mobile station to perform front and rear linear movement, and the driving screw can partially extend out of the end part of the first passive screw or the end part of the second passive screw, so that the stroke of the mobile station is greater than the length of the first passive screw or the second passive screw, and the large-stroke linear movement can be realized.
Description
The technical field is as follows:
the utility model relates to a linear drive technical field refers in particular to a straight line actuating mechanism that stroke is unrestricted.
Background art:
the linear driving mechanism is a mechanism that must be used for linear movement of various mechanical devices, such as a machine tool, an automation device (e.g., a digital printer), a robot, and the like. At present, the widely used linear driving mechanism comprises a ball screw pair, a gear rack pair and a belt gear pair.
The ball screw pair is widely used on various precision equipment, such as a machine tool, has multiple advantages of high speed, high precision, high stability and the like in short distance, but the ball screw pair is assembled, two bearing seats are arranged on two sides of the ball screw, the ball screw is driven to rotate by a servo motor, a driving sleeve is sleeved on the ball screw and drives a movable seat to move linearly, the ball screw pair of the structure can only control the movable seat to move linearly within the distance that the stroke is less than the length of the ball screw, the stroke of the ball screw pair is limited, so that the width of the movable seat and the width of the base are increased when the stroke needs to be increased, the size of the whole equipment can be greatly increased, the cost is also higher, the purpose of small size and large stroke of the equipment cannot be realized, and great troubles are caused to users.
The gear rack pair and the belt gear pair have the technical problems.
In view of the above, the present inventors propose the following.
The utility model has the following contents:
an object of the utility model is to overcome prior art's not enough, provide an unlimited straight line actuating mechanism of stroke.
In order to solve the technical problem, the utility model discloses a following technical scheme: the linear driving mechanism with unlimited stroke comprises a mobile station, a first passive screw rod and a second passive screw rod which are fixedly installed at the lower end of the mobile station, an active screw rod meshed with the first passive screw rod and the second passive screw rod, and a motor module used for driving the active screw rod to rotate.
Further, in the above technical solution, the surfaces of the first passive screw and the second passive screw are respectively provided with a first counter bore and a second counter bore, the first screw passes through the first counter bore and then locks the first passive screw to the lower end of the mobile station, the second screw passes through the second counter bore and then locks the second passive screw to the lower end of the mobile station, a gap is formed between the first passive screw and the second passive screw, and the active screw is disposed in the gap.
Further, in the above technical solution, two ends of the first passive screw and the second passive screw respectively extend to two ends of the mobile station.
Further, in the above technical solution, a boss is disposed on a lower end surface of the mobile station, and a first mounting groove and a second mounting groove which are distributed in parallel are disposed on the lower end surface of the boss; the first passive screw and the second passive screw are respectively arranged in the first mounting groove and the second mounting groove; the first passive screw and the second passive screw are both made of stainless steel.
Furthermore, in the above technical solution, the motor module includes a fixed base fixedly installed at the upper end of the base, a first supporting plate and a second supporting plate rotatably installed at two sides of the fixed base, a first spring mechanism connected between the first supporting plate and the fixed base, a second spring mechanism connected between the second supporting plate and the fixed base, a motor frame installed on the first supporting plate, a motor installed on the motor frame, a first belt pulley installed on a rotating shaft of the motor, a second belt pulley installed at an end of the driving screw rod, and a transmission belt connected between the first belt pulley and the second belt pulley, two ends of the driving screw rod are respectively installed on the first supporting plate and the second supporting plate through a first bearing and a second bearing, and the first supporting plate and the second supporting plate are respectively abutted against the first passive screw rod and the second passive screw rod under the elastic force of the first spring mechanism and the second spring mechanism, so that the driving screw rod is always tightly matched with the first driven screw rod and the second driven screw rod.
Further, in the above technical solution, a counterweight is installed on the second supporting plate.
Further, in the above technical solution, the surface of the driving screw protrudes out of the surfaces of the first support plate and the second support plate, and the surface of the driving screw protrudes out of the surface of the second pulley.
Further, in the above technical solution, the first support plate is provided with a third bearing, a first shaft body penetrates through the third bearing, and the first shaft body is installed on one side of the fixed seat; and a fourth bearing is installed on the second supporting plate, a second shaft body penetrates through the fourth bearing, and the second shaft body is installed on the other side of the fixed seat.
Furthermore, in the above technical solution, the first spring mechanism includes a first connecting piece fixed to one side of the fixing base and a first spring connected between the first connecting piece and the first supporting plate; the second spring mechanism comprises a second connecting sheet fixed on the other side of the fixed seat and a second spring connected between the second connecting sheet and the second support plate.
Further, in the above technical solution, the base is provided with a round shaft guide rail for drawing aluminum; the lower end of the mobile station is provided with a plurality of pulleys, the pulleys are positioned on two sides of the aluminum pulling circular shaft guide rail, and circular shafts on two sides of the aluminum pulling circular shaft guide rail are respectively arranged in sliding grooves on the outer surface of the pulleys.
After the technical scheme is adopted, compared with the prior art, the utility model has following beneficial effect: the utility model is characterized in that a first passive screw and a second passive screw are fixedly arranged at the lower end of the mobile station, and an active screw is engaged with the first passive screw and the second passive screw, after a motor module drives the active screw to rotate, because the first passive screw and the second passive screw are fixed, the active screw can linearly move back and forth on the first passive screw and the second passive screw to drive the mobile station to linearly move back and forth, and the active screw can partially extend out of the end part of the first passive screw or the second passive screw, so that the stroke of the mobile station is larger than that of the first passive screw or the second passive screw, and the stroke of the mobile station is not limited by the active screw and the first passive screw and the second passive screw, thereby realizing large-stroke linear motion without increasing the width of the mobile station and a machine base, and reducing the cost, the purpose of small volume and large stroke of the equipment can be realized, and the use is very convenient.
Description of the drawings:
fig. 1 is a perspective view of the present invention;
fig. 2 is a front view of the present invention;
fig. 3 is a perspective view of another perspective of the present invention;
fig. 4 is a perspective view of the present invention after the base is disassembled;
FIG. 5 is an assembly view of the driving screw and the motor module of the present invention;
fig. 6 is an assembly view of the driving screw and the motor module in another view angle.
The specific implementation mode is as follows:
the present invention will be further described with reference to the following specific embodiments and accompanying drawings.
Referring to fig. 1-6, a linear driving mechanism with unlimited stroke is disclosed, which comprises a movable stage 1, a first passive screw 2 and a second passive screw 3 fixedly mounted at the lower end of the movable stage 1, an active screw 4 engaged with the first passive screw 2 and the second passive screw 3, and a motor module 5 for driving the active screw 4 to rotate, the external thread directions of the first passive screw rod 2 and the second passive screw rod 3 are the same, the external thread directions of the active screw rod 4 and the first passive screw rod 2 are opposite, the motor module 5 is installed on the base 6, after the motor module 5 drives the driving screw 4 to rotate, the driving screw rod 4 drives the first driven screw rod 2 and the second driven screw rod 3 to synchronously move back and forth, so as to drive the mobile station 1 to move back and forth, and the stroke of the mobile station 1 is larger than the length of the first driven screw 2 or the second driven screw 3. The utility model is characterized in that a first passive screw rod 2 and a second passive screw rod 3 are fixedly arranged at the lower end of a mobile station 1, and an active screw rod 4 is meshed with the first passive screw rod 2 and the second passive screw rod 3, after a motor module 5 drives the active screw rod 4 to rotate, because the first passive screw rod 2 and the second passive screw rod 3 are fixed, the active screw rod 4 spirally and linearly moves back and forth on the first passive screw rod 2 and the second passive screw rod 3 to drive the mobile station 1 to linearly move back and forth, and the active screw rod 4 can partially extend out of the end part of the first passive screw rod 2 or the second passive screw rod 3, so that the stroke of the mobile station 1 is larger than the length of the first passive screw rod 2 or the second passive screw rod 3, and the stroke of the mobile station 1 is not limited by the active screw rod 4 and the first passive screw rod 2 and the second passive screw rod 3, and can realize large stroke linear motion, the widths of the mobile station 1 and the base 6 do not need to be increased, the cost is reduced, the purpose of small volume and large stroke of the equipment can be realized, and the use is very convenient.
The external thread directions of the first passive screw rod 2 and the second passive screw rod 3 are the same, and the external thread directions of the active screw rod 4 and the first passive screw rod 2 are opposite; that is, when the external threads of the first and second passive screws 2 and 3 are forward threads, the external threads of the active screw 4 are reverse threads. Alternatively, when the external threads of the first and second passive screws 2 and 3 are reverse threads, the external threads of the active screw 4 are forward threads.
The first driven screw 2 and the second driven screw 3 are both made of a steel material, so that the screw is light in weight, wear-resistant, low in cost and more convenient to use.
The surfaces of the first passive screw rod 2 and the second passive screw rod 3 are respectively provided with a first counter bore 21 and a second counter bore 31, a first screw penetrates through the first counter bore 21 to lock the first passive screw rod 2 at the lower end of the mobile platform 1, a second screw penetrates through the second counter bore 31 to lock the second passive screw rod 3 at the lower end of the mobile platform 1, a gap is formed between the first passive screw rod 2 and the second passive screw rod 3, and the active screw rod 4 is arranged in the gap. The first driven screw 2 and the second driven screw 3 are simple in assembly structure, and the surfaces of the first driven screw 2 and the second driven screw 3 are free of any shielding object, so that infinite transmission can be realized, and the purpose of unlimited stroke is achieved. Specifically, two ends of the first passive screw 2 and the second passive screw 3 extend to two ends of the mobile station 1 respectively; a boss 11 is arranged on the lower end surface of the mobile station 1, and a first mounting groove 111 and a second mounting groove 112 which are distributed in parallel are arranged on the lower end surface of the boss 11; the first and second driven screws 2 and 3 are respectively installed in the first and second installation grooves 111 and 112.
The motor module 5 includes a fixing base 51 fixedly installed at the upper end of the base 6, a first supporting plate 52 and a second supporting plate 53 rotatably installed at both sides of the fixing base 51, a first spring mechanism 54 connected between the first supporting plate 52 and the fixing base 51, a second spring mechanism 55 connected between the second supporting plate 53 and the fixing base 51, a motor bracket 56 installed on the first supporting plate 52, a motor 57 installed on the motor bracket 56, a first belt pulley installed on a rotating shaft of the motor 57, a second belt pulley 59 installed at an end of the driving screw rod 4, and a transmission belt 50 connected between the first belt pulley and the second belt pulley 59, wherein both ends of the driving screw rod 4 are installed on the first supporting plate 52 and the second supporting plate 53 through a first bearing and a second bearing, and the first supporting plate 52 and the second supporting plate 53 are installed toward the first driven screw rod 2 under the elastic force of the first spring mechanism 54 and the second spring mechanism 55 respectively And the direction of the second passive screw rod 3 is abutted, so that the driving screw rod 4 is always tightly matched with the first passive screw rod 2 and the second passive screw rod 3, and the driving stability between the driving screw rod 4 and the first passive screw rod 2 and the second passive screw rod 3 is ensured.
Install balancing weight 500 on the second backup pad 53, guarantee that first backup pad 52 and second backup pad 53's bearing is equal, make the operation of overall structure more stable.
The surface of the driving screw rod 4 protrudes out of the surfaces of the first support plate 52 and the second support plate 53, and the surface of the driving screw rod 4 protrudes out of the surface of the second pulley 59; a third bearing 521 is mounted on the first support plate 52, a first shaft 522 penetrates through the third bearing 521, and the first shaft 522 is mounted on one side of the fixed seat 51; the second support plate 53 is provided with a fourth bearing 531, a second shaft 532 penetrates through the fourth bearing 531, and the second shaft 532 is mounted on the other side of the fixed seat 51.
The first spring mechanism 54 includes a first connecting piece 541 fixed on one side of the fixing seat 51 and a first spring 542 connected between the first connecting piece 541 and the first supporting plate 52; the second spring mechanism 55 includes a second connecting piece 551 fixed on the other side of the fixing base 51 and a second spring connected between the second connecting piece 551 and the second supporting plate 53, so that the driving screw 4 is always tightly matched with the first driven screw 2 and the second driven screw 3, and the stability of transmission between the driving screw 4 and the first driven screw 2 and the second driven screw 3 is ensured.
The machine base 6 is provided with an aluminum drawing round shaft guide rail 61; the lower end of the mobile station 1 is provided with a plurality of pulleys 12, the pulleys 12 are located on two sides of the aluminum-drawn circular shaft guide rail 61, and the circular shafts 611 on two sides of the aluminum-drawn circular shaft guide rail 61 are respectively arranged in the sliding grooves on the outer surface of the pulleys 12, so that the mobile station 1 is stably installed on the machine base 6, and the mobile station 1 can stably move on the machine base 6.
To sum up, the present invention fixedly mounts the first passive screw 2 and the second passive screw 3 at the lower end of the mobile station 1, and uses the active screw 4 to engage with the first passive screw 2 and the second passive screw 3, after the motor module 5 drives the active screw 4 to rotate, because the first passive screw 2 and the second passive screw 3 are fixed, the active screw 4 linearly moves back and forth on the first passive screw 2 and the second passive screw 3 to drive the mobile station 1 to linearly move back and forth, and the active screw 4 can partially extend out of the end of the first passive screw 2 or the second passive screw 3, so that the stroke of the mobile station 1 is greater than the length of the first passive screw 2 or the second passive screw 3, and the stroke of the mobile station 1 is not limited by the active screw 4 and the first passive screw 2 and the second passive screw 3, the linear motion with large stroke can be realized without increasing the width of the mobile station 1 and the base 6, the cost is reduced, the purpose of small volume and large stroke of the equipment can be realized, and the use is very convenient.
Of course, the above description is only an exemplary embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent changes and modifications made by the constructions, features, and principles of the present invention in accordance with the claims of the present invention are intended to be included in the scope of the present invention.
Claims (10)
1. A linear driving mechanism with unlimited stroke is characterized in that: which comprises a mobile station (1), a first passive screw (2) and a second passive screw (3) which are fixedly arranged at the lower end of the mobile station (1), an active screw (4) which is meshed with the first passive screw (2) and the second passive screw (3), and a motor module (5) which is used for driving the active screw (4) to rotate, the external thread directions of the first passive screw (2) and the second passive screw (3) are the same, the direction of the external thread of the driving screw (4) is opposite to that of the first driven screw (2), the motor module (5) is arranged on the base (6), after the motor module (5) drives the driving screw rod (4) to rotate, the driving screw (4) drives the first driven screw (2) and the second driven screw (3) to synchronously move back and forth, so as to drive the mobile station (1) to move back and forth, and the stroke of the mobile station (1) is larger than the length of the first passive screw (2) or the second passive screw (3).
2. A linear drive mechanism of unlimited travel as claimed in claim 1, wherein: the surface of the first passive screw (2) and the surface of the second passive screw (3) are respectively provided with a first counter bore (21) and a second counter bore (31), the first screw penetrates through the first counter bore (21) and then locks the first passive screw (2) at the lower end of the mobile platform (1), the second screw penetrates through the second counter bore (31) and then locks the second passive screw (3) at the lower end of the mobile platform (1), a gap is formed between the first passive screw (2) and the second passive screw (3), and the active screw (4) is arranged in the gap.
3. A linear drive mechanism of unlimited travel as claimed in claim 1, wherein: the two ends of the first passive screw (2) and the second passive screw (3) respectively extend to the two ends of the mobile station (1).
4. A linear drive mechanism of unlimited travel as claimed in claim 1, wherein: a boss (11) is arranged on the lower end face of the mobile station (1), and a first mounting groove (111) and a second mounting groove (112) which are distributed in parallel are arranged on the lower end face of the boss (11); the first driven screw (2) and the second driven screw (3) are respectively arranged in the first mounting groove (111) and the second mounting groove (112); the first passive screw (2) and the second passive screw (3) are both made of stainless steel.
5. A non-limiting travel linear drive mechanism as claimed in any one of claims 1 to 4 wherein: the motor module (5) comprises a fixed seat (51) fixedly installed at the upper end of the machine base (6), a first supporting plate (52) and a second supporting plate (53) which are installed at two sides of the fixed seat (51) in a rotatable mode, a first spring mechanism (54) connected between the first supporting plate (52) and the fixed seat (51), a second spring mechanism (55) connected between the second supporting plate (53) and the fixed seat (51), a motor frame (56) installed on the first supporting plate (52), a motor (57) installed on the motor frame (56), a first belt pulley installed on a rotating shaft of the motor (57), a second belt pulley (59) installed at the end part of the driving screw rod (4) and a transmission belt (50) connected between the first belt pulley and the second belt pulley (59), wherein two ends of the driving screw rod (4) are installed on the first supporting plate (52) and the second supporting plate (53) through a first bearing and a second bearing respectively And the first support plate (52) and the second support plate (53) are respectively abutted against the first driven screw (2) and the second driven screw (3) under the elastic force action of the first spring mechanism (54) and the second spring mechanism (55), so that the driving screw (4) is always tightly matched with the first driven screw (2) and the second driven screw (3).
6. A linear drive mechanism of unlimited travel as claimed in claim 5, wherein: and a balancing weight (500) is arranged on the second supporting plate (53).
7. A linear drive mechanism of unlimited travel as claimed in claim 5, wherein: the surface of the driving screw rod (4) protrudes out of the surfaces of the first support plate (52) and the second support plate (53), and the surface of the driving screw rod (4) protrudes out of the surface of the second belt pulley (59).
8. A linear drive mechanism of unlimited travel as claimed in claim 5, wherein: a third bearing (521) is installed on the first supporting plate (52), a first shaft body (522) penetrates through the third bearing (521), and the first shaft body (522) is installed on one side of the fixed seat (51); the second support plate (53) is provided with a fourth bearing (531), a second shaft body (532) penetrates through the fourth bearing (531), and the second shaft body (532) is arranged on the other side of the fixed seat (51).
9. A linear drive mechanism of unlimited travel as claimed in claim 5, wherein: the first spring mechanism (54) comprises a first connecting piece (541) fixed on one side of the fixed seat (51) and a first spring (542) connected between the first connecting piece (541) and the first supporting plate (52); the second spring mechanism (55) comprises a second connecting piece (551) fixed on the other side of the fixed seat (51) and a second spring connected between the second connecting piece (551) and the second support plate (53).
10. A linear drive mechanism of unlimited travel as claimed in claim 5, wherein: an aluminum drawing round shaft guide rail (61) is arranged on the machine base (6); the lower end of the mobile station (1) is provided with a plurality of pulleys (12), the pulleys (12) are positioned on two sides of the aluminum pulling circular shaft guide rail (61), and circular shafts (611) on two sides of the aluminum pulling circular shaft guide rail (61) are respectively arranged in sliding grooves on the outer surface of the pulleys (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120994976.0U CN214603103U (en) | 2021-05-11 | 2021-05-11 | Linear driving mechanism with unlimited stroke |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120994976.0U CN214603103U (en) | 2021-05-11 | 2021-05-11 | Linear driving mechanism with unlimited stroke |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214603103U true CN214603103U (en) | 2021-11-05 |
Family
ID=78407483
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120994976.0U Active CN214603103U (en) | 2021-05-11 | 2021-05-11 | Linear driving mechanism with unlimited stroke |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214603103U (en) |
-
2021
- 2021-05-11 CN CN202120994976.0U patent/CN214603103U/en active Active
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