CN115086529A - New-type high accuracy focusing drive structure - Google Patents
New-type high accuracy focusing drive structure Download PDFInfo
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- CN115086529A CN115086529A CN202210789998.2A CN202210789998A CN115086529A CN 115086529 A CN115086529 A CN 115086529A CN 202210789998 A CN202210789998 A CN 202210789998A CN 115086529 A CN115086529 A CN 115086529A
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- 238000003825 pressing Methods 0.000 claims abstract description 19
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- 230000005540 biological transmission Effects 0.000 description 10
- 230000009471 action Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
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- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
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Abstract
The invention discloses a novel high-precision focusing driving structure, which comprises a fixed support and a movable push plate, wherein the fixed support is provided with a driving screw and a motor assembly component, the movable push plate is provided with a linkage nut, and the linkage nut is matched with the driving screw; the movable push plate is provided with a push plate driving part, the push plate driving part comprises an upper transverse blocking part and a lower transverse blocking part, the linkage nut is positioned between the upper transverse blocking part and the lower transverse blocking part, a pre-pressing gap spring is also arranged between the upper transverse blocking part and the lower transverse blocking part, and the pre-pressing gap spring pushes the linkage nut and enables the linkage nut to be abutted against the upper transverse blocking part; the motor assembly component comprises a motor mounting seat, a stepping motor and a driving worm, the driving worm is driven by the stepping motor, the driving worm is sleeved and fastened with a driving worm wheel, and the driving worm is meshed with the driving worm wheel. Through the structural design, the focusing device has the advantages of novel structural design, high focusing precision, low preparation cost and good stability and reliability.
Description
Technical Field
The invention relates to the technical field of lens focusing driving structures, in particular to a novel high-precision focusing driving structure.
Background
The Automatic Back Focus (ABF) technique is a technique for making an image accurately land on a photosensitive surface of an image sensor by adjusting the position of a target surface of the image sensor. For camera equipment such as a camera with ABF function, an infrared thermal imager and the like, an image sensor is generally driven by a corresponding ABF module, that is, the ABF module drives the image sensor to adjust the position.
For the ABF module, the ABF module generally comprises a fixed support and a movable push plate for mounting an image sensor, wherein the fixed support is provided with a driving screw rod which is vertically arranged, the movable push plate is provided with a linkage nut, and the linkage nut is matched with the driving screw rod; the fixed support is provided with a motor assembly component corresponding to the driving screw, and the motor assembly component is in driving connection with the driving screw.
It should be noted that, for a screw transmission mechanism composed of a driving screw and a linkage nut of the existing ABF module, the linkage nut and the movable push plate generally adopt the following two modes: 1. the linkage nut and the movable push plate are of an integrated structure, namely, a nut integrated structure design is adopted; the linkage nut and the movable push plate are of a split structure, namely, a nut split structure design is adopted. For the integrated structure design of the nut, the threaded hole of the linkage nut requires high machining precision to ensure the transmission precision, so that the preparation cost is increased. For the split structure design of the nut, a certain gap is formed between the linkage nut and the movable push plate and the gap is uncontrollable, so that the high-precision use occasion cannot be met.
Disclosure of Invention
The invention aims to provide a novel high-precision focusing driving structure aiming at the defects of the prior art, and the novel high-precision focusing driving structure has the advantages of novel design, high focusing precision, low preparation cost and good stability and reliability.
In order to achieve the above object, the present invention is achieved by the following technical solutions.
A novel high-precision focusing driving structure comprises a fixed support and a movable push plate for mounting an image sensor, wherein the fixed support is provided with a driving screw rod which is vertically arranged, the movable push plate is provided with a linkage nut, the linkage nut is sleeved on the periphery of the driving screw rod, and the linkage nut is meshed with the driving screw rod through threads;
the fixed bracket is provided with a motor assembly component corresponding to the driving screw rod, and the motor assembly component is in driving connection with the driving screw rod;
the movable push plate is provided with a push plate driving part, the push plate driving part comprises an upper end transverse blocking part and a lower end transverse blocking part, the upper end transverse blocking part and the lower end transverse blocking part are horizontally and transversely arranged respectively, the lower end transverse blocking part is positioned on the lower end side of the upper end transverse blocking part, the upper end transverse blocking part and the lower end transverse blocking part are arranged at intervals, and the linkage nut is positioned between the upper end transverse blocking part and the lower end transverse blocking part;
a pre-pressing gap spring which is vertically arranged is also arranged between the upper end transverse blocking part and the lower end transverse blocking part, the upper end part of the pre-pressing gap spring is abutted against the linkage nut, the lower end part of the pre-pressing gap spring is abutted against the lower end transverse blocking part, and the upper end surface of the linkage nut is abutted against the lower surface of the upper end transverse blocking part;
the motor assembly component comprises a motor mounting seat arranged on the fixed support, the motor mounting seat is provided with a stepping motor and a driving worm horizontally and transversely arranged, and a power output shaft of the stepping motor is in driving connection with the driving worm; the driving worm wheel is tightly sleeved on the driving screw rod corresponding to the driving worm, and the driving worm is meshed with the driving worm wheel.
The pre-pressing gap spring is sleeved on the periphery of the driving screw rod, a nut retaining shoulder is arranged at the upper end of the linkage nut, and the upper end of the pre-pressing gap spring is abutted to the nut retaining shoulder of the linkage nut.
The upper end transverse blocking part is provided with an upper end through hole which is completely penetrated from top to bottom, the lower end transverse blocking part is provided with a lower end through hole which is completely penetrated from top to bottom, the upper end through hole and the lower end through hole are vertically aligned, and the driving screw rod sequentially penetrates through the upper end through hole and the lower end through hole from top to bottom.
The push plate driving part and the movable push plate are of an integrated structure; or the push plate driving part is fixedly screwed on the movable push plate.
The fixed support comprises an upper end support and a lower end support positioned on the lower end side of the upper end support, and the movable push plate and the driving screw rod are respectively positioned between the upper end support and the lower end support;
the upper end support is provided with an upper end mounting hole corresponding to the driving screw, the lower end support is provided with a lower end mounting hole corresponding to the driving screw, the upper end of the driving screw is mounted in the upper end mounting hole through a ball bearing, and the lower end of the driving screw is mounted in the lower end mounting hole through a ball bearing.
The motor mounting seat is arranged on the lower end support and is provided with a mounting seat left side plate and a mounting seat right side plate which are vertically arranged respectively, the mounting seat left side plate and the mounting seat right side plate are right-to-left opposite and are arranged at intervals, and the driving worm is positioned between the mounting seat left side plate and the mounting seat right side plate;
the left side plate of the mounting seat is provided with a left side shaft sleeve corresponding to the driving worm, the right side plate of the mounting seat is provided with a right side shaft sleeve corresponding to the driving worm, the core part of the left side shaft sleeve is provided with a shaft sleeve through hole which is completely penetrated left and right, the core part of the right side shaft sleeve is provided with a shaft sleeve blind hole which is opened towards the left side, the left end part of the driving worm is embedded and inserted in the shaft sleeve through hole of the left side shaft sleeve, and the right end part of the driving worm is embedded and inserted in the shaft sleeve blind hole of the right side shaft sleeve;
the right end part of the driving worm is provided with a spring shoulder, the right end part of the driving worm is sleeved with a worm spring, the left end part of the worm spring is abutted against the spring shoulder of the driving worm, and the right end part of the worm spring is abutted against the right shaft sleeve; the left end of the driving worm is provided with a limiting blocking shoulder which is abutted against the left shaft sleeve.
The power output shaft of the stepping motor is sleeved and welded with a driving gear, the left end part of the driving worm is sleeved and welded with a driven gear, and the driving gear is meshed with the driven gear;
the stepping motor is fixedly screwed on the left side plate of the mounting seat.
The left side plate of the mounting seat is provided with a left side plate mounting hole which is completely penetrated left and right corresponding to the left side shaft sleeve, and the left side shaft sleeve is embedded in the left side mounting hole of the left side plate of the mounting seat;
the left side axle sleeve is provided with an axle sleeve shoulder, and the axle sleeve shoulder of the left side axle sleeve is abutted with the right end opening edge of the left side board mounting hole.
The right side plate of the mounting seat is provided with a right side plate mounting hole which is completely penetrated left and right corresponding to the right side shaft sleeve, the right side shaft sleeve is embedded in the right side plate mounting hole of the right side plate of the mounting seat, and the right side shaft sleeve is welded and fastened on the right side plate of the mounting seat.
The motor mounting seat also comprises a mounting seat bottom plate which is fixedly screwed on the lower end bracket;
the mounting seat left side board sets up in the left end portion of mounting seat bottom plate, and the mounting seat right side board sets up in the right-hand member portion of mounting seat bottom plate, and mounting seat left side board, mounting seat right side board, mounting seat bottom plate structure as an organic whole.
The invention has the beneficial effects that: the invention relates to a novel high-precision focusing driving structure, which comprises a fixed support and a movable push plate for mounting an image sensor, wherein the fixed support is provided with a driving screw rod which is vertically arranged, the movable push plate is provided with a linkage nut, the linkage nut is sleeved on the periphery of the driving screw rod, and the linkage nut is meshed with the driving screw rod through threads; the fixed bracket is provided with a motor assembly component corresponding to the driving screw rod, and the motor assembly component is in driving connection with the driving screw rod; the movable push plate is provided with a push plate driving part, the push plate driving part comprises an upper end transverse blocking part and a lower end transverse blocking part, the upper end transverse blocking part and the lower end transverse blocking part are horizontally and transversely arranged respectively, the lower end transverse blocking part is positioned on the lower end side of the upper end transverse blocking part, the upper end transverse blocking part and the lower end transverse blocking part are arranged at intervals, and the linkage nut is positioned between the upper end transverse blocking part and the lower end transverse blocking part; a pre-pressing gap spring which is vertically arranged is also arranged between the upper end transverse blocking part and the lower end transverse blocking part, the upper end part of the pre-pressing gap spring is abutted against the linkage nut, the lower end part of the pre-pressing gap spring is abutted against the lower end transverse blocking part, and the upper end surface of the linkage nut is abutted against the lower surface of the upper end transverse blocking part; the motor assembly component comprises a motor mounting seat arranged on the fixed support, the motor mounting seat is provided with a stepping motor and a driving worm horizontally and transversely arranged, and a power output shaft of the stepping motor is in driving connection with the driving worm; the driving worm wheel is tightly sleeved on the driving screw rod corresponding to the driving worm, and the driving worm is meshed with the driving worm wheel. Through the structural design, the focusing device has the advantages of novel structural design, high focusing precision, low preparation cost and good stability and reliability.
Drawings
The invention will be further described with reference to the drawings to which, however, the embodiments shown in the drawings do not constitute any limitation.
FIG. 1 is a schematic structural diagram of the present invention.
FIG. 2 is a schematic cross-sectional view of the present invention.
FIG. 3 is a schematic cross-sectional view of another embodiment of the present invention.
Fig. 4 is a partial structural schematic diagram of the present invention.
Fig. 5 is a schematic structural diagram of the motor assembly component of the present invention.
Fig. 1 to 5 include:
1-fixed support 11-upper end support
111-upper end mounting hole 12-lower end support
121-lower end mounting hole 2-movable push plate
21 push plate driving part 211 upper end transverse blocking part
2111-upper end through hole 212-lower end transverse baffle
2121-lower end through hole 3-driving screw
4-linkage nut 41-nut stop shoulder
5-Motor Assembly component 51-Motor mounting seat
511-mounting seat left side plate 5111-left side plate mounting hole
512-right side plate 5121-right side plate mounting hole of mounting base
513 mounting seat bottom plate 52 stepping motor
53-driving worm 531-spring shoulder
532-spacing stop shoulder 54-driving worm wheel
551 left side shaft sleeve 5511 shaft sleeve through hole
5512-shaft sleeve stop shoulder 552-right shaft sleeve
5521-shaft sleeve blind hole 56-worm spring
571 drive gear 572 driven gear.
6-prepressing gap spring 7-ball bearing.
Detailed Description
The present invention will be described below with reference to specific embodiments.
As shown in fig. 1 to 3, a novel high-precision focusing driving structure comprises a fixed support 1 and a movable push plate 2 for mounting an image sensor, wherein the fixed support 1 is provided with a driving screw 3 which is vertically arranged, the movable push plate 2 is provided with a linkage nut 4, the linkage nut 4 is sleeved on the periphery of the driving screw 3, and the linkage nut 4 is meshed with the driving screw 3 through threads.
Wherein, the fixed bracket 1 is provided with a motor assembly component 5 corresponding to the driving screw rod 3, and the motor assembly component 5 is in driving connection with the driving screw rod 3.
Furthermore, the movable push plate 2 is provided with a push plate driving portion 21, the push plate driving portion 21 comprises an upper end transverse blocking portion 211 and a lower end transverse blocking portion 212, the upper end transverse blocking portion 211 and the lower end transverse blocking portion 212 are horizontally and transversely arranged, the lower end transverse blocking portion 212 is located on the lower end side of the upper end transverse blocking portion 211, the upper end transverse blocking portion 211 and the lower end transverse blocking portion 212 are arranged at intervals, and the linkage nut 4 is located between the upper end transverse blocking portion 211 and the lower end transverse blocking portion 212. It should be explained that, for the push plate driving part 21 of the present invention, it can adopt an integrated structure design, and can also adopt a split structure design; for the push plate driving part 21 with an integrated structure design, the push plate driving part 21 and the movable push plate 2 are integrated; for the push plate driving part 21 with a split structure design, the push plate driving part 21 is screwed and fastened to the movable push plate 2.
Furthermore, a pre-pressing gap spring 6 is vertically arranged between the upper end transverse blocking part 211 and the lower end transverse blocking part 212, the upper end of the pre-pressing gap spring 6 is abutted with the linkage nut 4, the lower end of the pre-pressing gap spring 6 is abutted with the lower end transverse blocking part 212, and the upper end surface of the linkage nut 4 is abutted with the lower surface of the upper end transverse blocking part 211.
In addition, the motor assembly component 5 comprises a motor mounting seat 51 arranged on the fixed support 1, the motor mounting seat 51 is provided with a stepping motor 52 and a driving worm 53 horizontally and transversely arranged, and a power output shaft of the stepping motor 52 is in driving connection with the driving worm 53; the driving worm wheel 54 is tightly fitted on the driving screw 3 corresponding to the driving worm 53, and the driving worm 53 is engaged with the driving worm wheel 54. The drive worm gear 54 of the present invention may be fixedly attached to the drive screw 3 by welding.
In the working process of the invention, the stepping motor 52 drives the driving worm 53 to rotate, the rotating driving worm 53 drives the driving worm wheel 54 to rotate, the rotating driving worm wheel 54 drives the driving screw rod 3 to rotate synchronously, as the driving screw rod 3 is meshed with the linkage nut 4 through threads, namely the rotating driving screw rod 3 drives the linkage nut 4 to move up and down, and the linkage nut 4 moving up and down drives the movable push plate 2 to move up and down synchronously through the push plate driving part 21, so as to realize the focusing action of the image sensor arranged on the movable push plate 2. The worm-gear transmission mechanism composed of the driving worm 53 and the driving worm wheel 54 has good self-locking performance, and when the movable push plate 2 moves up and down to a required position, the self-locking structure composed of the driving worm 53 and the driving worm wheel 54 can keep the movable push plate 2 at a specified position.
It should be emphasized that the linkage nut 4 and the push plate driving part 21 of the present invention adopt a split structure design, which can effectively avoid the defects of high processing precision requirement and high preparation cost of the existing nut integrated structure.
In addition, in the working process of the invention, the prepressing gap spring 6 elastically pushes the linkage nut 4 and enables the linkage nut 4 to be abutted against and attached to the upper end transverse blocking part 211, namely, in the process that the driving screw 3 drives the movable push plate 2 to perform displacement transmission through the linkage nut 4, the linkage nut 4 and the push plate driving part 21 are kept attached, and the structural design can effectively avoid the transmission gap problem existing in the existing nut split type structure. The prepressing gap spring 6 elastically acts on the linkage nut 4, and under the elastic action of the prepressing gap spring 6, the thread of the linkage nut 4 and the thread of the driving screw rod 3 are in a fit state, so that the transmission gap between the driving screw rod 3 and the linkage nut 4 can be effectively avoided, and the requirement of high-precision displacement transmission is met.
It should be further emphasized that, when the action force of the movable pushing plate 2 is too large due to the large external force, the slip idle rotation between the linkage nut 4 and the movable pushing plate 2 occurs, that is, the linkage nut 4 moves up and down relative to the pushing plate driving portion 21 and compresses the pre-pressing gap spring 6, and the slip protection structure design can effectively protect the driving structure of the driving screw rod 3, so as to avoid the damage of the driving structure of the driving screw rod 3 caused by the large external force action of the movable pushing plate 2, and further improve the stability and reliability.
By combining the above conditions, the invention has the advantages of novel structural design, high focusing precision, low preparation cost and good stability and reliability.
As shown in fig. 3 to 5, a pre-pressure gap spring 6 is preferably installed around the drive screw 3, a nut shoulder 41 is provided at the upper end of the interlocking nut 4, and the upper end of the pre-pressure gap spring 6 abuts against the nut shoulder 41 of the interlocking nut 4.
In the installation process of the prepressing clearance spring 6, the prepressing clearance spring 6 is directly sleeved on the periphery of the driving screw rod 3, so that the prepressing clearance spring 6 can be quickly installed and positioned; the nut stopper shoulder 41 provided at the upper end portion of the coupling nut 4 can ensure that the pre-pressure gap spring 6 is stably and reliably elastically abutted against the coupling nut 4.
As a preferred embodiment, as shown in fig. 3 and 4, the upper transverse blocking portion 211 is provided with an upper through hole 2111 passing completely through from top to bottom, the lower transverse blocking portion 212 is provided with a lower through hole 2121 passing completely through from top to bottom, the upper through hole 2111 is vertically aligned with the lower through hole 2121, and the driving screw 3 passes through the upper through hole 2111 and the lower through hole 2121 in sequence from top to bottom.
In the installation process of the present invention, the driving screw 3 sequentially passes through the upper end through hole 2111 and the lower end through hole 2121 from top to bottom, i.e. the driving screw 3 extends into the gap between the upper end transverse blocking portion 211 and the lower end transverse blocking portion 212, so as to ensure that the linkage nut 4 is stably and reliably installed between the upper end transverse blocking portion 211 and the lower end transverse blocking portion 212.
As a preferred embodiment, as shown in fig. 1 to 3, the fixed bracket 1 includes an upper bracket 11 and a lower bracket 12 located at the lower end side of the upper bracket 11, and the movable push plate 2 and the driving screw 3 are respectively located between the upper bracket 11 and the lower bracket 12; wherein, the upper end bracket 11 can be screwed and fastened on the upper end part of the lower end bracket 12 through a locking screw.
The upper end bracket 11 has an upper end mounting hole 111 corresponding to the drive screw 3, the lower end bracket 12 has a lower end mounting hole 121 corresponding to the drive screw 3, the upper end of the drive screw 3 is mounted in the upper end mounting hole 111 through a ball bearing 7, and the lower end of the drive screw 3 is mounted in the lower end mounting hole 121 through the ball bearing 7.
The upper end part and the lower end part of the driving screw rod 3 are respectively arranged on the upper end bracket 11 and the lower end bracket 12 on the corresponding sides through the ball bearings 7, and the structural design can effectively reduce the friction between the driving screw rod 3 and the fixed bracket 1 and can improve the transmission efficiency.
As shown in fig. 1, 2 and 5, in a preferred embodiment, the motor mount 51 is mounted on the lower end bracket 12, the motor mount 51 is provided with a mount left side plate 511 and a mount right side plate 512 which are vertically arranged, the mount left side plate 511 and the mount right side plate 512 are arranged right and left oppositely and at an interval, and the driving worm 53 is located between the mount left side plate 511 and the mount right side plate 512.
The left side plate 511 of the mounting seat is provided with a left side shaft sleeve 551 corresponding to the driving worm 53, the right side plate 512 of the mounting seat is provided with a right side shaft sleeve 552 corresponding to the driving worm 53, a shaft sleeve through hole 5511 which completely penetrates from left to right is formed in the core part of the left side shaft sleeve 551, a shaft sleeve blind hole 5521 which is opened towards the left side is formed in the core part of the right side shaft sleeve 552, the left end part of the driving worm 53 is embedded and inserted in the shaft sleeve through hole 5511 of the left side shaft sleeve 551, and the right end part of the driving worm 53 is embedded and inserted in the shaft sleeve blind hole 5521 of the right side shaft sleeve 552.
In addition, the right end of the driving worm 53 is provided with a spring shoulder 531, the right end of the driving worm 53 is sleeved with a worm spring 56, the left end of the worm spring 56 is abutted with the spring shoulder 531 of the driving worm 53, and the right end of the worm spring 56 is abutted with the right side shaft sleeve 552; the left end of the driving worm 53 is provided with a limit stop shoulder 532, and the limit stop shoulder 532 is abutted with the left shaft sleeve 551.
In addition, the stepping motor 52 of the present invention can be drivingly connected to the driving worm 53 in the following manner: a power output shaft of the stepping motor 52 is sleeved and welded with a driving gear 571, the left end part of the driving worm 53 is sleeved and welded with a driven gear 572, and the driving gear 571 is meshed with the driven gear 572; the stepping motor 52 is screwed to the mount left side plate 511.
When the stepping motor 52 works, the driving worm 53 is driven to rotate by the gear transmission mechanism consisting of the driving gear 571 and the driven gear 572, the worm spring 56 keeps elastically abutting against the spring stop shoulder 531 of the driving worm 53, and the structural design can effectively avoid the situation of axial movement when the driving worm 53 rotates and ensure that the driving worm 53 is stably and reliably contacted with the driving worm wheel 54 when meshed so as to avoid the influence of the gap between the driving worm 53 and the driving worm wheel 54 on the transmission precision.
It should be noted that the stepping motor 52 and the driving worm 53 of the present invention are respectively arranged in the horizontal direction, that is, the stepping motor 52 and the driving worm 53 are respectively perpendicular to the driving screw 3 arranged in the vertical direction, and the structural design can effectively reduce the vertical installation space of the stepping motor 52 and the driving worm 53, so that the overall structure of the present invention is more compact.
As shown in fig. 1 and 2, the left side plate 511 of the mounting seat is provided with a left side plate mounting hole 5111 which is completely penetrated left and right corresponding to the left side bushing 551, and the left side bushing 551 is embedded in the left side mounting hole of the left side plate 511 of the mounting seat; the left side shaft sleeve 551 is provided with a shaft sleeve stopper 5512, and the shaft sleeve stopper 5512 of the left side shaft sleeve 551 abuts against the right end opening edge of the left side plate mounting hole 5111.
The right side plate 512 of the mounting seat is provided with a right side plate mounting hole 5121 which is completely penetrated left and right corresponding to the right side shaft sleeve 552, the right side shaft sleeve 552 is embedded in the right side plate mounting hole 5121 of the right side plate 512 of the mounting seat, and the right side shaft sleeve 552 is welded and fastened on the right side plate 512 of the mounting seat.
As shown in fig. 1, 2 and 5, the motor mounting base 51 further includes a mounting base plate 513, and the mounting base plate 513 is screwed and fastened to the lower end bracket 12; the mounting seat left side plate 511 is arranged at the left end part of the mounting seat bottom plate 513, the mounting seat right side plate 512 is arranged at the right end part of the mounting seat bottom plate 513, and the mounting seat left side plate 511, the mounting seat right side plate 512 and the mounting seat bottom plate 513 are of an integral structure.
The above description is only a preferred embodiment of the present invention, and for those skilled in the art, the present invention should not be limited by the description of the present invention, which should be interpreted as a limitation.
Claims (10)
1. A novel high-precision focusing driving structure comprises a fixed support (1) and a movable push plate (2) for mounting an image sensor, wherein the fixed support (1) is provided with a driving screw (3) which is vertically arranged, the movable push plate (2) is provided with a linkage nut (4), the linkage nut (4) is sleeved on the periphery of the driving screw (3), and the linkage nut (4) is meshed with the driving screw (3) through threads;
the fixed support (1) is provided with a motor assembly component (5) corresponding to the driving screw (3), and the motor assembly component (5) is in driving connection with the driving screw (3);
the method is characterized in that: the movable push plate (2) is provided with a push plate driving part (21), the push plate driving part (21) comprises an upper end transverse blocking part (211) and a lower end transverse blocking part (212), the upper end transverse blocking part (211) and the lower end transverse blocking part (212) are horizontally and transversely arranged respectively, the upper end transverse blocking part (211) and the lower end transverse blocking part (212) are arranged at intervals, and the linkage nut (4) is positioned between the upper end transverse blocking part (211) and the lower end transverse blocking part (212);
a pre-pressing gap spring (6) which is vertically arranged is also arranged between the upper end transverse blocking part (211) and the lower end transverse blocking part (212), the upper end part of the pre-pressing gap spring (6) is abutted against the linkage nut (4), the lower end part of the pre-pressing gap spring (6) is abutted against the lower end transverse blocking part (212), and the upper end surface of the linkage nut (4) is abutted against the lower surface of the upper end transverse blocking part (211);
the motor assembly component (5) comprises a motor mounting seat (51) arranged on the fixed support (1), the motor mounting seat (51) is provided with a stepping motor (52) and a driving worm (53) horizontally and transversely arranged, and a power output shaft of the stepping motor (52) is in driving connection with the driving worm (53); a driving worm wheel (54) is sleeved and fastened on the driving screw rod (3) corresponding to the driving worm (53), and the driving worm (53) is meshed with the driving worm wheel (54).
2. The novel high-precision focusing driving structure of claim 1, wherein: the pre-pressing gap spring (6) is sleeved on the periphery of the driving screw rod (3), a nut blocking shoulder (41) is arranged at the upper end part of the linkage nut (4), and the upper end part of the pre-pressing gap spring (6) is abutted against the nut blocking shoulder (41) of the linkage nut (4).
3. The novel high-precision focusing driving structure of claim 1, wherein: the upper end transverse blocking portion (211) is provided with an upper end through hole (2111) which completely penetrates from top to bottom, the lower end transverse blocking portion (212) is provided with a lower end through hole (2121) which completely penetrates from top to bottom, the upper end through hole (2111) and the lower end through hole (2121) are vertically aligned and arranged, and the driving screw (3) sequentially penetrates through the upper end through hole (2111) and the lower end through hole (2121) from top to bottom.
4. The novel high-precision focusing driving structure of claim 1, wherein: the push plate driving part (21) and the movable push plate (2) are of an integral structure; or the push plate driving part (21) is fixedly fastened to the movable push plate (2) in a threaded manner.
5. The novel high-precision focusing driving structure of claim 1, wherein: the fixed support (1) comprises an upper end support (11) and a lower end support (12) positioned on the lower end side of the upper end support (11), and the movable push plate (2) and the driving screw (3) are respectively positioned between the upper end support (11) and the lower end support (12);
the upper end support (11) is provided with an upper end mounting hole (111) corresponding to the driving screw (3), the lower end support (12) is provided with a lower end mounting hole (121) corresponding to the driving screw (3), the upper end of the driving screw (3) is mounted in the upper end mounting hole (111) through a ball bearing (7), and the lower end of the driving screw (3) is mounted in the lower end mounting hole (121) through the ball bearing (7).
6. The novel high-precision focusing driving structure as claimed in claim 5, wherein: the motor mounting seat (51) is arranged on the lower end support (12), the motor mounting seat (51) is provided with a mounting seat left side plate (511) and a mounting seat right side plate (512) which are vertically arranged respectively, the mounting seat left side plate (511) and the mounting seat right side plate (512) are right-left opposite and are arranged at intervals, and the driving worm (53) is positioned between the mounting seat left side plate (511) and the mounting seat right side plate (512);
the left side plate (511) of the mounting seat is provided with a left side shaft sleeve (551) corresponding to the driving worm (53), the right side plate (512) of the mounting seat is provided with a right side shaft sleeve (552) corresponding to the driving worm (53), the core part of the left side shaft sleeve (551) is provided with a shaft sleeve through hole (5511) which completely penetrates left and right, the core part of the right side shaft sleeve (552) is provided with a shaft sleeve blind hole (5521) which is opened towards the left side, the left end part of the driving worm (53) is embedded in the shaft sleeve through hole (5511) of the left side shaft sleeve (551), and the right end part of the driving worm (53) is embedded in the shaft sleeve blind hole (5521) of the right side shaft sleeve (552);
a spring shoulder (531) is arranged at the right end of the driving worm (53), a worm spring (56) is sleeved at the right end of the driving worm (53), the left end of the worm spring (56) is abutted against the spring shoulder (531) of the driving worm (53), and the right end of the worm spring (56) is abutted against the right side shaft sleeve (552); the left end part of the driving worm (53) is provided with a limiting stop shoulder (532), and the limiting stop shoulder (532) is abutted against the left side shaft sleeve (551).
7. The novel high-precision focusing driving structure of claim 6, wherein: a driving gear (571) is sleeved and welded on a power output shaft of the stepping motor (52), a driven gear (572) is sleeved and welded on the left end of the driving worm (53), and the driving gear (571) is meshed with the driven gear (572);
the stepping motor (52) is fixedly screwed on the left side plate (511) of the mounting seat.
8. The novel high-precision focusing driving structure as claimed in claim 6, wherein: the left side plate (511) of the mounting seat is provided with a left side plate mounting hole (5111) which is completely penetrated left and right corresponding to the left side shaft sleeve (551), and the left side shaft sleeve (551) is embedded in the left side mounting hole of the left side plate (511) of the mounting seat;
the left side shaft sleeve (551) is provided with a shaft sleeve blocking shoulder (5512), and the shaft sleeve blocking shoulder (5512) of the left side shaft sleeve (551) is abutted against the right end opening edge part of the left side plate mounting hole (5111).
9. The novel high-precision focusing driving structure of claim 6, wherein: the right side plate (512) of the mounting seat is provided with a right side plate mounting hole (5121) which is completely penetrated left and right corresponding to the right side shaft sleeve (552), the right side shaft sleeve (552) is embedded in the right side plate mounting hole (5121) of the right side plate (512) of the mounting seat, and the right side shaft sleeve (552) is welded and fastened on the right side plate (512) of the mounting seat.
10. The novel high-precision focusing driving structure of claim 6, wherein: the motor mounting seat (51) further comprises a mounting seat bottom plate (513), and the mounting seat bottom plate (513) is fixedly screwed to the lower end bracket (12);
the mounting seat left side plate (511) is arranged at the left end part of the mounting seat bottom plate (513), the mounting seat right side plate (512) is arranged at the right end part of the mounting seat bottom plate (513), and the mounting seat left side plate (511), the mounting seat right side plate (512) and the mounting seat bottom plate (513) are of an integrated structure.
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| CN202210789998.2A CN115086529B (en) | 2022-07-06 | 2022-07-06 | High-precision focusing driving structure |
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