Constant-pitch roller pre-tensioning device for a quilting machine

Abstract

The invention relates to a constant-pitch roller pre-tightening device of a quilting machine, which is aimed at solving the technical problem that the meshing gap between gears is prone to become larger when the base thickness of the existing similar products changes, thus leading to the small-range asynchronization of the main and driven rollers. The main points are that the end shaft part of the driven roller of the roller pre-tightening device is provided with an integrally-formed constant gear ring, the inner gear ring at the inner diameter of the transition gear on both ends of the driven roller is engaged with the constant gear ring on both sides, the outer gear ring at the outer diameter of the transition gear is engaged with the inner gear ring at the shaft part of the main roller on one side, the transition gear and the first gear are respectively located on the inner side of the bearing seat on both sides, the third gear and the second gear are respectively arranged at the shaft part on both ends of the driven roller and the secondary roller on the outer side of the bearing seat, the outer gear ring at the third gear of the driven roller is engaged with the outer gear ring at the second gear of the secondary roller, the eccentric sleeve is arranged on the outer diameter of the driven roller in the bearing seat, and the fixed screw is arranged in the fixed hole on one side of the corresponding gear.

Description

TECHNICAL FIELD

[0001] The present application relates to a roller pre-tightening mechanism of a quilting machine, and is a constant-pitch roller pre-tightening device of a quilting machine. BACKGROUND

[0002] A quilting machine, also known as a quilting machine, is a machine that combines quilting and embroidery. It can quilt fabric and embroider. It is a combined sewing machine used for embroidering or sewing whole textiles. Its working principle is similar to that of a common computerized embroidery machine, i.e. several heads are arranged around a main shaft, and the embroidery needles on all the heads perform embroidery on the base material (cloth or leather) in the same relative trajectory through a digital control system. The base material is fed through the pre-tightening mechanism of the quilting machine. Such a pre-tightening mechanism is disclosed in Chinese patent document No. 201210288738.3, published on December 26, 2012, with the title "quilting machine base material synchronous pre-tightening mechanism and synchronous pre-tightening method". Although the above-mentioned device structure is used in quilting machines and similar products, and the pre-tightening is achieved through an eccentric sleeve and its corresponding structure, when the thickness of the base material clamped between the main and driven rollers changes, the gear pitch of the main and driven rollers with rigid engagement will change, i.e. the meshing gap between the gears will increase. Because the base material driven by the rollers has forward and reverse movements in actual work, the change in the meshing gap will cause the main and driven rollers to be out of sync in a small range, thereby affecting the base material between the front and rear roller sets to produce wrinkles and insufficient tension, and further causing needle trace deviation and inability to return to the original position during reciprocating embroidery. SUMMARY

[0003] To overcome the above-mentioned shortcomings, the purpose of the present application is to provide a constant-pitch roller pre-tightening device for a quilting machine, which solves the technical problem that when the thickness of the base material changes in the existing similar products, the meshing gap between the gears is easily enlarged, thereby causing the main and driven rollers to be out of sync in a small range, affecting the base material between the front and rear roller sets to produce wrinkles and insufficient tension, and further causing needle trace deviation and inability to return to the original position during reciprocating embroidery. The purpose is achieved through the following technical solutions.

[0004] The application discloses a constant pitch roller pre-tightening device of a quilting machine, which is arranged at a position of a bottom plate of the quilting machine for base material synchronous pre-tightening, and is symmetrically provided with a secondary roller and a primary roller on two sides of the roller. The two ends of the primary roller, the secondary roller and the secondary roller are respectively connected through gear wheels in bearing seats to realize synchronous rotation. The shaft parts corresponding to the rotation of the rollers are respectively provided with bearings in the bearing seats. The structure design points of the application are that the outer diameters of the two ends of the secondary roller are respectively provided with integral constant gear rings. The inner tooth rings of the constant gear rings of the two ends of the secondary roller are respectively engaged with the inner tooth rings of the transition gear wheels on the two sides, and the outer tooth rings of the transition gear wheels are respectively engaged with the outer tooth rings of the first gear wheels on the inner sides of the two ends of the primary roller on one side. The transition gear wheels and the first gear wheels are respectively located on the inner sides of the two bearing seats. The third gear wheels and the second gear wheels are respectively arranged at the two ends of the shaft parts of the secondary roller and the secondary roller on the outer sides of the two bearing seats. The outer tooth rings of the third gear wheels of the secondary roller are engaged with the outer tooth rings of the second gear wheels of the secondary roller. The outer diameters of the secondary roller in the bearing seats are provided with eccentric sleeves. The first gear wheels, the second gear wheels and the third gear wheels are respectively provided with fixed screws and fixed holes on one side. The synchronous rotation of the primary roller, the secondary roller and the secondary roller is realized through the above structure. The stability of the secondary roller is improved through the engagement of the constant gear rings of the secondary roller and the inner tooth rings of the transition gear wheels.

[0005] The shaft parts of the secondary roller are respectively installed in the inner sleeve sleeves of the wheel openings on the two sides of the roller main body through screws. The shaft parts of the secondary roller, the inner sleeve sleeves and the roller main body are sequentially connected into an integral whole. The above structure is convenient for the installation of the constant gear rings at the two ends of the shaft parts of the secondary roller into the inner sleeve sleeves in the roller main body. The above structure can also be adopted for the shaft parts at the two ends of the secondary roller and the primary roller.

[0006] The top parts of the bearing seats on the two sides above the secondary roller are respectively provided with adjusting blocks which are fixed in the bearing seats through locking screws. The shaft parts of the secondary roller on the outer sides of the two bearing seats are respectively provided with adjusting plates. The adjusting plates are respectively provided with arc-shaped adjusting sliding holes. The inner hexagonal adjusting screws are respectively passed through the adjusting sliding holes of the adjusting plates and fixed in the adjusting blocks. The eccentric positions and the pre-tightening pressures of the column rollers are adjusted through the above inner hexagonal adjusting screws.

[0007] The two end shaft parts of the secondary roller at the inner side of the bearing seat are respectively provided with pressing plates. The main bearing sleeve is fixed in the fixed seat through the pressing plates. The main bearing sleeve is an eccentric sleeve. The outer diameter of the shaft part of the secondary roller in the main shaft sleeve is provided with a bearing. Another bearing is arranged in the bottom plate hole of the pressing plate. The bottom sleeve opening of the transition gear is sleeved with the other bearing fixed in the pressing plate. The above is a specific structure of the installation of the two end bearings of the secondary roller. The double-bearing structure improves the stability and flexibility of the secondary roller.

[0008] The two end shaft parts of the secondary roller and / or the main roller are respectively provided with a secondary bearing sleeve inside the bearing seat, the secondary bearing sleeve is fixed in the bearing seat by interference fit, and a bearing is arranged in the secondary bearing sleeve.

[0009] The bearing seat is fixed to the sliding groove of the bottom plate by a bottom plate screw, the opening of the bearing seat on one side is in C shape, and the secondary bearing sleeve is arranged in the opening of the bearing seat and is slidably fixed in the bearing seat.

[0010] The present application has reasonable structure design, convenient use, assembly, maintenance and adjustment, good synchronous pre-tightening effect, and is used for the quilting machine constant pitch roller pre-tightening device for synchronous pre-tightening of embroidery base material and structural improvement of similar products. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 It is an explosive structure schematic diagram of the present application.

[0012] Figure 2 It is Figure 1 The assembled three-dimensional structure schematic diagram.

[0013] Figure 3 It is Figure 2 The rear structure schematic diagram.

[0014] Figure 4 It is Figure 2 The top view structure schematic diagram, A-A section view, B-B section view and C-C section view are made in the figure.

[0015] Figure 5 It is Figure 4 The A-A section view structure schematic diagram, and the frame of A part is made in the figure.

[0016] Figure 6 It is Figure 5 The A part enlarged view.

[0017] Figure 7 It is Figure 4 The B-B section view structure schematic diagram.

[0018] Figure 8 It is Figure 4 The C-C section view structure schematic diagram.

[0019] Figure 9 It is Figure 2 The side bearing seat structure top view structure schematic diagram, the shaft part of the roller is included in the figure, and E-E section view and D-D section view are made.

[0020] Figure 10 It isFigure 9 Schematic diagram of the EE cross-section structure.

[0021] Figure 11 yes Figure 9 Schematic diagram of the DD cross-sectional structure.

[0022] Figure 12 yes Figure 2 A schematic diagram of the usage state structure.

[0023] Attached figures and their names: 1. Base plate, 2. Bearing housing, 3. Adjusting block, 4. Main roller, 5. Slave roller, 501. Constant gear ring, 6. Secondary roller, 7. Transition gear, 8. First gear, 9. Pressure plate, 10. Bearing, 11. Main bearing sleeve, 12. Secondary bearing sleeve, 13. Adjusting plate, 14. Second gear, 15. Third gear, 16. Hexagonal socket head cap screw. Implementation

[0024] The structure and working principle of the present invention will now be further described with reference to the accompanying drawings. Figures 1-12 As shown, the roller pre-tightening device is set on the base plate 1 of the quilting machine for synchronous pre-tightening of the base material, or two sets of the roller pre-tightening devices are set at a distance on the base plate. The secondary roller 6 and the main roller 4 are symmetrically arranged on both sides of the roller 5. The two ends of the main roller, the secondary roller, and the secondary roller are respectively meshed with each other through gears at the bearing seat 2 to achieve synchronous rotation. The bearing seat is provided with bearings 10 respectively for the shaft part corresponding to the rotation of the roller. Its specific structure is as follows: The outer diameter of the shaft at both ends of the roller is provided with an integrally formed constant gear ring 501. The constant gear ring at both ends of the roller meshes with the inner gear ring at the inner diameter of the transition gear 7 on both sides. The outer gear ring at the outer diameter of the transition gear meshes with the outer gear ring at the first gear on the inner side of the shaft at both ends of the main roller on one side. The transition gear and the first gear are located on the inner side of the bearing seats on both sides. The shaft ends of the roller and the secondary roller on the outer side of the bearing seats on both sides are provided with a third gear 15 and a second gear 14 respectively. The outer gear ring at the third gear of the roller meshes with the outer gear ring at the second gear of the secondary roller. The first gear, the second gear and the third gear are provided with fixing screws and fixing holes on one side respectively.

[0025] The adjusting blocks 3 are respectively arranged on the top of the bearing seats on both sides of the roller, and are fixed to the bearing seats by locking screws. The adjusting plates 7 are respectively arranged on the outer sides of the bearing seats on both sides of the roller, and are respectively provided with arc-shaped adjusting sliding holes. The inner hexagonal adjusting screws 16 respectively pass through the adjusting sliding holes of the adjusting plates and are fixed to the adjusting blocks. The inner sleeves are respectively arranged on the wheel openings on both sides of the roller body by screws, and are connected to the shaft portions of the roller, the secondary roller and the primary roller. The shaft portions of the roller, the inner sleeves and the roller body are sequentially connected as a whole. The pressing plates 9 are respectively arranged on the shaft portions on both ends of the roller in the inner sides of the bearing seats. The main bearing sleeves 11 are fixed to the fixed seats by the pressing plates. The main bearing sleeves are eccentric sleeves. The shaft portions of the roller are provided with a bearing in the outer diameters of the main shaft sleeves. The bottom plate holes of the pressing plates are provided with another bearing. The bottom sleeve openings of the transition gears are sleeved into the another bearing fixed in the pressing plates. The secondary bearing sleeves 12 are respectively arranged in the inner sides of the bearing seats on the shaft portions of the secondary roller. The secondary bearing sleeves are fixed to the bearing seats by interference. The secondary bearing sleeves are respectively provided with a bearing. Another bearing is respectively arranged in the inner sides of the bearing seats on the shaft portions of the primary roller. The shaft portions of the primary roller are directly sleeved into the another bearing.

[0026] In use, the inner hexagonal adjusting screws of the bearing seats on both sides are loosened. The primary roller, the secondary roller and the roller pass through the base material. The inner hexagonal adjusting screws of the bearing seats on both sides are adjusted and locked. The base material is retracted and extended by the base roller. The primary roller, the secondary roller and the roller can be synchronously rotated.

[0027] In summary, the main technical features of the roller pre-tightening device are as follows: 1) the first gear of the primary roller is rigidly engaged with the transition gear; 2) the center of the transition gear is coincided with the outer diameter center of the eccentric sleeve in the bearing seat, and the first gear of the primary roller and the transition gear are fixed relative to the bearing seat; 3) the center of the shaft portion of the roller is located in the inner diameter center of the eccentric sleeve, and the rotation of the eccentric sleeve makes the center of the shaft portion of the roller rotate around the center of the transition gear; 4) the purpose of keeping the meshing gap between the three gears constant when the distance between the first gear of the primary roller and the shaft portion of the roller changes is achieved; 5) by controlling the gear ratio of each gear, the gear ratio of the first gear of the primary roller and the transition gear is the same as the constant gear ratio of the inner teeth of the transition gear and the shaft portion of the roller, and the driven roller of the primary roller and the roller are completely synchronized.

Claims

1. A quilting machine constant pitch roller pre-tightening device, the roller pre-tightening device is arranged at a position for base material synchronous pre-tightening of a bottom plate (1) of a quilting machine, a secondary roller (6) and a main roller (4) are symmetrically arranged from both sides of a roller (5), the two ends of the main roller, the roller and the secondary roller are respectively connected through gear engagement in a bearing seat (2) to realize synchronous rotation, and a bearing (10) is arranged in the bearing seat corresponding to the shaft of the roller; characterized in that The constant gear ring (501) is integrally formed on the outer diameter of the shaft part of the slave roller (5) at both ends, the inner gear ring at the inner diameter of the transition gear (7) at both ends of the slave roller is engaged with the outer gear ring at the outer diameter of the transition gear at one side, the outer gear ring at the outer diameter of the transition gear is engaged with the outer gear ring at the inner side of the first gear (8) at both ends of the shaft part of the main roller (4) at one side, the transition gear and the first gear are respectively located at the inner side of the bearing seat (2), the third gear (15) and the second gear (14) are respectively arranged at the shaft part at both ends of the slave roller and the secondary roller (6) at the outer side of the bearing seat, the outer gear ring at the third gear of the slave roller is engaged with the outer gear ring at the second gear of the secondary roller, the eccentric sleeve is arranged on the outer diameter of the slave roller in the bearing seat, the first gear, the second gear and the third gear are respectively provided with a fixing screw and a fixing hole; the shaft part of the slave roller (5) is installed in the inner sleeve of the wheel port at both sides of the roller body through a screw, the shaft part of the slave roller, the inner sleeve and the roller body are sequentially connected as a whole; the shaft part at both ends of the slave roller (5) at the inner side of the bearing seat (2) is respectively provided with a pressing plate (9), the main bearing sleeve (11) is fixed in the fixed seat through the pressing plate, the main bearing sleeve is an eccentric sleeve, the bearing (10) is arranged on the outer diameter of the shaft part of the slave roller in the main shaft sleeve, the bottom plate hole of the pressing plate is provided with another bearing, the bottom sleeve of the transition gear (7) is sleeved into the other bearing fixed in the pressing plate.

2. The constant-pitch roller pre-tensioning device for a quilting machine according to claim 1, characterized in that The adjusting block (3) is fixed in the bearing seat through a locking screw, and is arranged at the top of the bearing seat (2) at both sides of the slave roller (5) above, the adjusting plate (13) is arranged at the outer side of the shaft part of the slave roller at both sides of the bearing seat, the adjusting sliding hole of the adjusting plate is arc-shaped, and the inner hexagonal adjusting screw (16) passes through the adjusting sliding hole of the adjusting plate and is fixed in the adjusting block.

3. The constant-pitch roller pre-tensioning device for a quilting machine according to claim 1, characterized in that The secondary bearing sleeve (12) is arranged at the inner side of the bearing seat (2) at both ends of the shaft part of the secondary roller (6) and / or the main roller (4), the secondary bearing sleeve is fixed in the bearing seat through interference fit, and the bearing (10) is arranged in the secondary bearing sleeve.

4. The constant-pitch roller pre-tensioning device for a quilting machine according to claim 1, characterized in that The bearing seat (2) is fixed in the sliding groove of the bottom plate (1) through a bottom plate screw, the opening of the bearing seat at one side is C-shaped, and the secondary bearing sleeve (12) of the secondary roller (6) is slidably fixed in the opening of the bearing seat.

Images