CN211571002U

CN211571002U - Double-screw rod driving device for Y-axis of sewing machine

Info

Publication number: CN211571002U
Application number: CN201921881510.9U
Authority: CN
Inventors: 张章生
Original assignee: Sichuan Kiase Sewing Machine Co ltd
Current assignee: Sichuan Kiase Sewing Machine Co ltd
Priority date: 2019-11-04
Filing date: 2019-11-04
Publication date: 2020-09-25
Anticipated expiration: 2029-11-04

Abstract

The utility model discloses a double-screw rod driving device of a Y shaft of a sewing machine, which relates to the technical field of sewing machine machinery and solves the technical problem that the error of synchronous rotation of two screw rods is larger in the application of double-shaft driving in the prior art, the utility model discloses a driving motor and two screw rod transmission mechanisms, a synchronous belt wheel which is the same and rotates synchronously is fixedly arranged on a main shaft of the driving motor, two driven wheels are respectively arranged on the screw rods of the two screw rod transmission mechanisms, the two synchronous belt wheels on the driving motor are both positioned between the two screw rods, the synchronous belt wheel on the main shaft of one driving motor is connected with the driven wheel on one screw rod through a synchronous belt I, the synchronous belt wheel on the main shaft of the other driving motor is connected with the driven wheel on the other screw rod through a synchronous belt II, and the length of the synchronous belt I is consistent; the utility model discloses in can reducing biax driven application effectively, the great technical problem of synchronous turning error of two lead screws.

Description

Double-screw rod driving device for Y-axis of sewing machine

Technical Field

The utility model relates to a sewing machine machinery technical field, more specifically are two lead screw drive arrangement that relate to a sewing machine Y axle are applied to sewing machine mechanical equipment fields such as industrial sewing machine, template sewing machine and cutter.

Background

In the development of sewing machines, high speed and high precision are key points for improving the productivity and sewing quality of sewing machines, and how to improve the sewing speed and the sewing precision becomes an important subject for the development of tool machines. The production efficiency of the machine tool machining is improved, the speed must be improved within a limited stroke, but along with the improvement of the speed, when the machine tool is fed at a high speed, the instant driving force easily causes the generation of vibration, once the vibration is generated in the machining process, the machining precision is reduced, the sewing quality is further influenced, the requirements of high speed and high precision cannot be met, and the machining speed cannot be improved when the sewing precision is required. The vibration phenomenon of the sewing machine during instantaneous acceleration and deceleration is mainly caused by poor matching of the structural rigidity and inertia of a driving system, so that the vibration caused by high-speed feeding can be effectively reduced as long as the structural rigidity of the traditional system is enhanced. When the structural rigidity of the traditional system is increased, the mass of the whole sewing machine is increased, the required driving power is required to be correspondingly increased when the mass of a transmission system is larger, and the mass of the whole sewing machine is limited due to the space design of a machine table.

Due to the factors, the sewing machine gradually adopts a driving framework of the double screw rods on the design of the driving shaft, so that the structural rigidity of the feeding system can be increased, and the moment influence caused by the eccentricity of the driving force can be reduced. The advantage of the dual-axis synchronous drive is that the dual-axis drive is usually applied for obtaining larger load capacity or for loading and unloading systems with large span, so the main requirement on use is not focused on high-speed sewing.

Summarizing the current application of the dual-shaft drive, there are several advantages, which will be discussed in more detail below. (1) Suppressing vibration at high speed; (2) the rigidity of the system is improved, and the service life of the screw rod is prolonged; (3) improving system response; (1) suppressing vibration at high acceleration and deceleration.

However, in the prior art, the application of the double-shaft drive is mainly to drive through a double-drive motor, some of the double-shaft drive is to connect belt wheels on two screw rods and belt wheels on a motor rotating shaft in series through a single conveying belt to drive, and the motor rotating shaft is provided with two bevel gears which respectively drive the two screw rods to rotate, and the like, so that the synchronous rotation error of the two screw rods is large.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a: in order to solve among the prior art double-shaft drive's the application, the great technical problem of synchronous turning error of two lead screws, the utility model provides a double-screw drive arrangement of sewing machine Y axle.

The utility model discloses a realize above-mentioned purpose and specifically adopt following technical scheme:

the utility model provides a two lead screw drive arrangement of sewing machine Y axle, including driving motor and two lead screw drive mechanisms, the fixed action wheel that sets up two specifications and the equal unanimity of model on driving motor's main shaft, the fixed driven wheel that sets up specification and the equal unanimity of model on two lead screw drive mechanism's lead screw respectively, action wheel and driven wheel are synchronous pulley, two action wheels all are located between two lead screws, one of them action wheel and one of them lead screw from the driving wheel through hold-in range one and be connected, another action wheel and another lead screw from the driving wheel through hold-in range two with be connected, hold-in range one is unanimous with hold-in range two.

When the pivot of CD-ROM drive motor rotated, the drive was fixed and is rotated at two action wheels in the CD-ROM drive motor pivot, because two action wheels pass through synchronous belt drive with the follow driving wheel on two lead screw drive mechanism's the lead screw respectively, in order to realize the function of two lead screws of single CD-ROM drive motor drive, simultaneously, because two lead screws directly pass through synchronous belt drive by CD-ROM drive motor, consequently, the pretightning force of two synchronous belts in case fixed just can not change, consequently two lead screws are by CD-ROM drive motor direct drive, and the drive mode is unanimous, just so can guarantee two lead screws and rotate in step under CD-ROM drive. Compared with the prior art, the two methods in the prior art can not reduce the synchronous rotation error of the two screw rods, when the two screw rods are driven to rotate by a single conveying belt, the tensioning force applied to each area on the conveying belt is different, and the tensioning force applied to the conveying belt between the two screw rods is different from the tensioning force applied to the screw rods and the driving motor, so that the synchronous rotation error is larger when the same motor drives the two screw rods to synchronously rotate. In a similar way, when the single motor drives the two screw rods to rotate by utilizing the bevel gears, the rigidity of the rotating shaft close to the motor part is better than that of the rotating shaft far away from the motor, so that the transmission efficiency of the screw rods far away from the motor and the motor can be lower than that of the screw rods close to the motor, and the synchronous rotation error of the two screw rods can still be caused to be larger even if the single motor drives the two screw rods to rotate by utilizing the bevel gears.

Therefore, the technical problem that the synchronous rotation error of the two screw rods is large in the application of double-shaft driving can be effectively solved by the technical scheme.

The length of the two synchronous belts is consistent, so that the synchronous error caused by the deformation of the synchronous belts in the working process can be effectively solved, and the deformation quantity of the two synchronous belts is consistent due to the length of the two synchronous belts, so that the synchronous rotation error of the two screw rods can be further reduced; compared with the prior art, the length of each conveyor belt can be shortened by the aid of two synchronous belts with the same length for transmission, and accordingly transmission accuracy of the conveyor belts is improved after the conveyor belts are shortened.

The utility model has the advantages as follows:

1. when the pivot of CD-ROM drive motor rotated, the drive was fixed and is rotated at two action wheels in the CD-ROM drive motor pivot, because two action wheels pass through synchronous belt drive with the follow driving wheel on two lead screw drive mechanism's the lead screw respectively, in order to realize the function of two lead screws of single CD-ROM drive motor drive, simultaneously, because two lead screws directly pass through synchronous belt drive by CD-ROM drive motor, consequently, the pretightning force of two synchronous belts in case fixed just can not change, consequently two lead screws are by CD-ROM drive motor direct drive, and the drive mode is unanimous, just so can guarantee two lead screws and rotate in step under CD-ROM drive. Compared with the prior art, the two methods in the prior art can not reduce the synchronous rotation error of the two screw rods, when the two screw rods are driven to rotate by a single conveying belt, the tensioning force applied to each area on the conveying belt is different, and the tensioning force applied to the conveying belt between the two screw rods is different from the tensioning force applied to the screw rods and the driving motor, so that the synchronous rotation error is larger when the same motor drives the two screw rods to synchronously rotate. In a similar way, when the single motor drives the two screw rods to rotate by utilizing the bevel gears, the rigidity of the rotating shaft close to the motor part is better than that of the rotating shaft far away from the motor, so that the transmission efficiency of the screw rods far away from the motor and the motor can be lower than that of the screw rods close to the motor, and the synchronous rotation error of the two screw rods can still be caused to be larger even if the single motor drives the two screw rods to rotate by utilizing the bevel gears.

2. The length of the two synchronous belts is consistent, so that the synchronous error caused by the deformation of the synchronous belts in the working process can be effectively solved, and the deformation quantity of the two synchronous belts is consistent due to the length of the two synchronous belts, so that the synchronous rotation error of the two screw rods can be further reduced; compared with the prior art, the length of each conveyor belt can be shortened by the aid of two synchronous belts with the same length for transmission, and accordingly transmission accuracy of the conveyor belts is improved after the conveyor belts are shortened.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

fig. 2 is a schematic diagram of the explosion structure of the present invention;

FIG. 3 is a schematic diagram of a prior art dual lead screw driving structure I;

fig. 4 is a schematic diagram of a dual screw driving structure in the prior art.

Reference numerals: 1-driving motor, 2-synchronous belt I, 3-adjusting nut, 4-bearing I, 5-snap spring, 6-synchronous belt pulley I, 7-bearing II, 8-screw rod I, 9-X-axis transmission mechanism, 10-connecting block I, 11-screw rod nut I, 12-sliding block I, 13-linear guide rail I, 14-bearing III, 15-bearing seat, 16-screw rod II, 17-linear guide rail II, 18-sliding block II, 19-screw rod nut II, 20-connecting block II, 21-synchronous belt pulley III, 22-synchronous belt pulley IV, 23-synchronous belt II, 24-synchronous belt pulley II, 25-casing base, 26-driving wheel and 27-tensioning wheel.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

In the description of the embodiments of the present invention, it should be noted that the terms "inside", "outside", "up", and the like indicate the directions or positional relationships based on the directions or positional relationships shown in the drawings, or the directions or positional relationships that the products of the present invention are conventionally placed when used, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element to which the term refers must have a specific direction, be constructed and operated in a specific direction, and thus, should not be construed as limiting the present invention.

Example 1

As shown in fig. 1 to 2, the present embodiment provides a double-screw driving device for a Y-axis of a sewing machine, which includes a driving motor 1 and two screw transmission mechanisms, two driving wheels with uniform specifications and types are fixedly disposed on a main shaft of the driving motor 1, driven wheels with uniform specifications and types are fixedly disposed on screws of the two screw transmission mechanisms, the driving wheels and the driven wheels are synchronous belt wheels, one of the driving wheels is connected with a driven wheel on one screw through a synchronous belt, the other driving wheel is connected with a driven wheel on the other screw through a synchronous belt, and the two synchronous belts are uniform in length.

Example 2

Further optimization is carried out on the basis of the embodiment 1, the driving motor 1 is positioned between the two screw rods, and the distances from the two synchronous belt wheels on the driving motor 1 to the first synchronous belt wheel 6 and the second synchronous belt wheel 24 are equal.

Example 3

As shown in fig. 1 to 2, the present embodiment provides a double-screw driving device for a Y-axis of a sewing machine, which includes a driving motor 1 and two screw transmission mechanisms, two driving wheels with the same specification and model are fixedly disposed on a main shaft of the driving motor 1, driven wheels with the same specification and model are fixedly disposed on screws of the two screw transmission mechanisms, the driving wheels and the driven wheels are synchronous belt wheels, one of the driving wheels is connected with a driven wheel on one screw through a synchronous belt, and the other driving wheel is connected with a driven wheel on the other screw through a synchronous belt.

A first linear guide rail 13 and a second linear guide rail 17 parallel to the first linear guide rail 13 are arranged on a machine shell base 25 of the sewing machine, a first connecting block 10 is arranged on a first sliding block 12 on the first linear guide rail 13, the first connecting block 10 is fixedly connected with the first sliding block 12 through screws, a second sliding block 18 is arranged on the second linear guide rail 17, a second connecting block 20 is arranged on the second sliding block 18, the second sliding block 18 is fixedly connected with the second connecting block 20 through screws, a screw nut I11 of a screw transmission mechanism is fixed on the first connecting block 10, the first screw nut 11 is connected with the first connecting block 10 through screws, a screw nut II 19 of the other screw transmission mechanism is fixed on the second connecting block 20 through screws, one end of an X-axis transmission mechanism 9 is fixed on the first connecting block 10 through screws, the other end of the X-axis transmission mechanism 9 is fixed on the second connecting block 20 through screws, and the left end of a screw rod I8 matched with the first screw nut 11, the first screw rod 8 is further provided with a first bearing 4 and a second bearing 7, the first bearing 4 and the second bearing 7 are respectively located on two sides of the first synchronous pulley 6, a clamp spring 5 is further arranged between the first bearing 4 and the first synchronous pulley 6, the first synchronous pulley 6 is separated from the first bearing 4 through the clamp spring 5, the clamp spring 5 is further arranged between the second bearing 7 and the first synchronous pulley 6, the first synchronous pulley 6 is separated from the second bearing 7 through the clamp spring 5, a bearing seat 15 is arranged at the right end of the first screw rod 8, a third bearing 14 is arranged in the bearing seat 15, the first screw rod 8 is in interference fit with an inner hole of the third bearing 14, the bearing seat 15 is also sleeved outside the first bearing 4 and the second bearing 7, the bearing seat 15 is fixedly connected with the casing base 25 through screws, the first screw rod 8 and the second screw rod 16 are both provided with adjusting nuts 3, and the adjusting nuts 3 are both in.

Similarly, the left end of a screw rod II 16 matched with the screw rod nut II 19 is fixedly connected with a synchronous pulley II 24, a bearing I4 and a bearing II 7 are further arranged on the screw rod II 16, the bearing I4 and the bearing II 7 are respectively positioned on two sides of the synchronous pulley II 24, a clamp spring 5 is further arranged between the bearing I4 and the synchronous pulley II 24, the synchronous pulley II 24 is separated from the bearing I4 by the clamp spring 5, the clamp spring 5 is further arranged between the bearing II 7 and the synchronous pulley II 24, the synchronous pulley II 24 is separated from the bearing II 7 by the clamp spring 5, a bearing seat 15 is arranged at the right end of the screw rod II 16, a bearing III 14 is arranged in the bearing seat 15, the screw rod II 16 is in interference fit with an inner hole of the bearing III 14, meanwhile, the bearing I4 and the bearing II 7 are also sleeved with the bearing seat 15, and the bearing seat.

Set up three 21 synchronous pulley and four 22 synchronous pulley the same with three 21 synchronous pulley in the pivot of driving motor 1, the hole of three 21 synchronous pulley and four 22 synchronous pulley all with driving motor 1's pivot interference fit, driving motor 1's pivot has set up bearing and bearing support seat after passing three 21 synchronous pulley and four 22 synchronous pulley, driving motor 1's pivot and bearing hole interference fit, set up in the through-hole with bearing excircle interference fit on the bearing support seat, bearing support seat passes through screw fixed connection with chassis base 25, driving motor 1's casing passes through bolt fixed connection with chassis base 25.

Example 4

As shown in fig. 3, in the case of a single motor driving dual lead screw in the prior art, a synchronous pulley one 6, a synchronous pulley three 21 and a driving wheel 26 are connected through a synchronous belt one 2, the driving wheel 26 is a synchronous pulley, a tension wheel 27 tensions the synchronous pulley one 6, an inner hole of the driving wheel 26 is in interference fit with a rotating shaft of the driving motor 1, an inner hole of the synchronous pulley one 6 is in interference fit with a first lead screw 8, and an inner hole of the synchronous pulley three 21 is in interference fit with a second lead screw 16. In order to improve conveying efficiency, however, when driving motor 1's pivot rotated, the drive was fixed and is rotated at two action wheels of driving motor 1 epaxial, because two action wheels pass through synchronous belt drive with the follow driving wheel on two lead screw drive mechanism's the lead screw respectively, in order to realize the function of two lead screws of single driving motor 1 drive, and simultaneously, because two lead screws are by driving motor 1 direct through synchronous belt drive, consequently, the pretightning force of two synchronous belts just can not change in case fixed, consequently, two lead screws are by driving motor 1 direct drive, and the drive mode is unanimous, just so can guarantee two lead screws and rotate in step under driving motor 1's drive.

Therefore, in the two methods in the prior art, the synchronous rotation error of the two screw rods cannot be reduced, when the two screw rods are driven to rotate by a single conveying belt, the tensioning force applied to each area on the conveying belt is different, and the tensioning force applied to the conveying belt between the two screw rods is different from the tensioning force applied to the screw rods and the driving motor, so that the synchronous rotation error is larger when the same motor drives the two screw rods to synchronously rotate.

Example 5

As shown in fig. 4, in the case of a single-motor driven dual screw in the prior art, a second screw 16 is arranged in parallel with a first screw 8, a first bevel gear is arranged at the lower end of the second screw 16, a second bevel gear identical to the first bevel gear is arranged at the lower end of the first screw 8, two third bevel gears identical to each other are arranged on a rotating shaft of a driving motor 1, inner holes of the third bevel gears are engaged with the rotating shaft, and the two third bevel gears are respectively engaged with the first bevel gear and the second bevel gear, so that the single-motor driven dual screw is realized.

When the single motor drives the two screw rods to rotate by utilizing the bevel gear, the rigidity of a rotating shaft close to the driving motor 1 is better than that of a rotating shaft far away from the driving motor 1, because the distance between the bevel gear three far away from the driving motor 1 and the shell of the driving motor 1 is longer than that between the bevel gear three near to the driving motor 1, the transmission efficiency of the screw rod one 8 far away from the driving motor 1 and the driving motor 1 is lower than that of the screw rod two 16 near to the driving motor 1, even if the meshing forces of the two bevel gears three are the same, because of different distances, the amount of distortion generated by the rotating shaft of the driving motor 1 at the two bevel gears three along with the rotating shaft is different relative to the rotating core of the driving motor 1, and the amount of distortion of the rotating shaft at the bevel gear three far away from the driving motor 1 is larger, therefore, the synchronous rotating error of the two screw rods is larger when the single motor drives the two screw rods to rotate by utilizing the bevel gears There is hysteresis in the output torque of gear three with respect to the output torque of bevel gear three near the drive motor 1.

Therefore, the technical scheme can effectively reduce the technical problem that the synchronous rotation error of the two screw rods is large in the application of double-shaft driving.

Claims

1. A double-screw driving device of a Y shaft of a sewing machine comprises a driving motor (1) and two screw rod transmission mechanisms, and is characterized in that two synchronous belt wheels which have the same specification and model and rotate synchronously or a driving wheel which is fixedly connected into a whole by the two synchronous belt wheels are fixedly arranged on a main shaft of the driving motor (1), driven wheels which have the same specification and model are fixedly arranged on the two screw rods of the two screw rod transmission mechanisms respectively, the driven wheels are synchronous belt wheels, the two synchronous belt wheels on the main shaft of the driving motor (1) are positioned between the two screw rods, the synchronous belt wheel on the main shaft of one driving motor (1) is connected with the driven wheel on one screw rod through a synchronous belt I (2), the synchronous belt wheel on the main shaft of the other driving motor (1) is connected with the driven wheel on the other screw rod through a synchronous belt II (23), the length of the first synchronous belt (2) is consistent with that of the second synchronous belt (23).

2. Double screw drive for a Y-axis of a sewing machine according to claim 1, characterised in that a separation stop is provided between two synchronous pulleys on the main shaft of the drive motor (1).

3. The double-screw driving device for the Y-axis of the sewing machine as claimed in claim 2, wherein the two synchronous pulleys on the main shaft of the driving motor (1) and the separation baffle are in a connected structure.