A double-belt lifting presser foot mechanism

Abstract

The invention discloses a double-belt liftable presser foot mechanism, comprising a presser foot drive assembly, a belt transmission assembly, a power assembly and a needle bar presser foot assembly, wherein the presser foot drive assembly comprises a presser foot drive shaft and a presser foot driver, the presser foot drive shaft is vertically fixed in a housing of a machine head and is parallel to a driving shaft, the presser foot driver is slidably fixed on the presser foot drive shaft and the driving shaft, the belt transmission assembly comprises an active transmission mechanism and a driven transmission mechanism, the power assembly is fixed in the housing and drives an active transmission belt in the active transmission mechanism to rotate, the active transmission belt drives a driven transmission belt in the driven transmission mechanism to rotate, the presser foot driver is connected to the driven transmission belt and is driven by the driven transmission belt to move up and down along the presser foot drive shaft and the driving shaft, the needle bar presser foot assembly and the presser foot driver are detachably fixed, and the double-belt structure can make the overall force more uniform, and maintenance and replacement are more convenient.

Description

[Technical field]

[0001] The invention relates to the technical field of embroidery machines, in particular to the technical field of a double-belt lifting and lowering presser foot mechanism. [Background technology]

[0002] The presser foot mechanism of traditional embroidery machines uses a fixed cam curve to achieve the up and down movement of the presser foot. If you want to achieve different fabric thicknesses, you need to manually adjust the presser foot height of each machine head, which is inefficient. In addition, the presser foot is mainly fixed by a presser foot spring, and the effect is generally not ideal for embroidering thick materials. [Summary of the invention]

[0003] The purpose of the present invention is to solve the problems in the prior art and to propose a double-belt presser foot lifting mechanism with high overall transmission efficiency and large adjustment accuracy. The double-belt structure can make the overall force more uniform and is more convenient to replace in subsequent maintenance.

[0004] To achieve the above-mentioned purpose, the present invention proposes a double-belt liftable presser foot mechanism, comprising a presser foot drive assembly, a belt transmission assembly, a power assembly and a needle bar presser foot assembly, the presser foot drive assembly comprising a presser foot drive shaft and a presser foot driver, the presser foot drive shaft is vertically fixed in a housing of a machine head and is parallel to a driving shaft, the presser foot driver is slidably fixed on the presser foot drive shaft and the driving shaft, the belt transmission assembly comprises an active transmission mechanism and a driven transmission mechanism, the power assembly is fixed in the housing and drives the active transmission belt in the active transmission mechanism to rotate, the active transmission belt drives the driven transmission belt in the driven transmission mechanism to rotate, the presser foot driver is connected to the driven transmission belt and is driven by the driven transmission belt to move up and down along the presser foot drive shaft and the driving shaft, and the needle bar presser foot assembly and the presser foot driver are detachably fixed.

[0005] Preferably, the presser foot driving assembly further comprises a pressing plate, which is detachably fixed to one side of the presser foot driver and presses and fixes the driven transmission belt to the outer wall of the presser foot driver.

[0006] Preferably, the side edges of the presser foot driver close to the driven transmission belt are respectively provided with ridges in parallel, a belt clamping groove is formed between the ridges, and the driven transmission belt is located in the belt clamping groove.

[0007] Preferably, end protrusions are respectively provided at the upper and lower ends of the convex ridge portion, and a pressure plate clamping groove is formed between the end protrusions of the same convex ridge portion, and the pressure plate is located in the pressure plate clamping groove.

[0008] Preferably, the driven transmission mechanism comprises a driven pulley fixing pin, a transmission mechanism support, a driven transmission belt and a presser foot driven pulley, the transmission mechanism support is fixed in the casing, a plurality of driven pulley fixing pins are respectively fixed on the same side of the transmission mechanism support, a plurality of presser foot driven pulleys are respectively rotatably fixed on the driven pulley fixing pin through bearings, at least two of the presser foot driven pulleys are located on the same vertical line parallel to the presser foot driving shaft, the driven transmission belt is sleeved outside the presser foot driven pulley, the active transmission mechanism comprises the presser foot transmission pulley and the active transmission belt, the power assembly comprises a motor seat fixing plate and a closed-loop motor, the motor seat fixing plate is located at the rear side of the transmission mechanism support, the closed-loop motor is fixed at the rear side of the motor seat fixing plate, the presser foot transmission pulley is located in the opening of the transmission mechanism support and is connected to the output shaft of the closed-loop motor, and the active transmission belt is sleeved outside the presser foot transmission pulley and one of the presser foot driven pulleys.

[0009] Preferably, the active transmission mechanism further comprises a tensioning wheel and a tensioning wheel pin, wherein the tensioning wheel pin is fixed on the transmission mechanism support and is located on the same side as the driven pulley fixing pin, and the tensioning wheel is rotatably fixed on the tensioning wheel pin via a bearing.

[0010] Preferably, the needle bar presser foot assembly includes a presser foot fixing shaft, a presser foot positioning block and a presser foot body. The presser foot fixing shaft can be slidably arranged up and down in the axial hole of the frame body of the needle bar frame and is parallel to the presser foot driving shaft. The presser foot positioning block is fixed to the upper end of the presser foot fixing shaft, the presser foot positioning block is snap-connected with the presser foot driver, and the presser foot body is fixed to the bottom end of the presser foot fixing shaft.

[0011] Preferably, a sliding sleeve is provided on the side of the presser foot positioning block, an embroidery needle assembly is vertically provided in the needle bar frame, the needle bar of the embroidery needle assembly is parallel to the presser foot fixed axis, and the sliding sleeve is slidably fixed on the needle bar.

[0012] Preferably, a clamping plate is provided on the outer wall of the presser foot driver, and a clamping block is provided on the outer wall of the presser foot positioning block, and the clamping block is fixedly engaged with the clamping plate.

[0013] The beneficial effects of the present invention are as follows: the present invention drives the active transmission belt in the active transmission mechanism to rotate through a closed-loop motor, and then uses the active transmission belt to drive the driven transmission belt to rotate, so that the presser foot driver fixed on the vertical belt section of the driven transmission belt moves up and down along the active shaft and the presser foot driving shaft, so that the needle bar presser foot assembly can be quickly adjusted to move up and down to any suitable position according to the needs of different embroidery products, the overall transmission efficiency is high, the adjustment accuracy is large, and the double-belt structure can make the overall force more uniform, and replacement is more convenient in subsequent maintenance; by arranging a convex ridge portion on the presser foot driver and forming a belt clamping groove, it is convenient to install and position the driven transmission belt; by arranging an end convex block on the convex ridge portion and forming a pressure plate clamping groove, the connection stability between the presser foot driver and the pressure plate is effectively enhanced; by arranging a presser foot positioning block, the height of the presser foot body is effectively positioned; by arranging a sliding sleeve on the presser foot positioning block, it can slide up and down along the needle bar during the up and down movement, thereby improving the stability of the movement.

[0014] The features and advantages of the present invention will be described in detail through embodiments in conjunction with the accompanying drawings.

Brief Description of the Drawings

[0015] Figure 1 It is a front view of a double-belt lifting presser foot mechanism of the present invention installed inside the machine head and the needle bar frame;

[0016] Figure 2 It is a left view of a double-belt lifting presser foot mechanism of the present invention installed in the machine head and the needle bar frame;

[0017] Figure 3 It is a right view of a double-belt lifting presser foot mechanism of the present invention installed in the machine head and the needle bar frame;

[0018] Figure 4 It is an exploded schematic diagram of the machine head with the presser foot drive assembly, belt drive assembly and power assembly installed;

[0019] Figure 5 yes Figure 4 An enlarged schematic diagram of point A;

[0020] Figure 6 It is a three-dimensional structural schematic diagram of a needle bar frame with a needle bar presser foot assembly installed;

[0021] Figure 7 It is a three-dimensional structural schematic diagram of the needle bar presser foot assembly;

[0022] Figure 8 It is an exploded view of the needle bar presser foot assembly.

[0023] In the figure: 1-machine head, 11-machine housing, 12-driving shaft, 13-presser foot driving assembly, 131-presser foot driving shaft, 132-presser foot driver, 1321-clip plate, 1322-convex ridge, 1323-end convex block, 133-pressing plate, 14-belt transmission assembly, 141-driven pulley fixing pin, 142-transmission mechanism support, 1421-opening, 143-driven transmission belt, 144-presser foot transmission pulley, 145- Presser foot driven pulley, 146-active transmission belt, 147-tensioning wheel, 148-tensioning wheel pin, 15-power assembly, 151-motor seat fixing plate, 152-closed loop motor, 16-needle bar presser foot assembly, 161-presser foot fixing shaft, 162-presser foot positioning block, 1621-sliding sleeve, 1622-block, 163-presser foot body, 2-needle bar frame, 21-frame, 211-axis hole, 22-embroidery needle assembly, 221-needle bar. [Specific implementation method]

[0024] See also Figures 1 to 8 (The teeth of the driven transmission belt 143 and the active transmission belt 146 are omitted in the figure), a double-belt lifting presser foot mechanism of the present invention comprises a presser foot driving assembly 13, a belt transmission assembly 14, a power assembly 15 and a needle bar presser foot assembly 16, the presser foot driving assembly 13 comprises a presser foot driving shaft 131 and a presser foot driver 132, the presser foot driving shaft 131 is vertically fixed in the housing 11 of the machine head 1 and is parallel to the driving shaft 12, the presser foot driver 132 is slidably fixed on the presser foot driving shaft 131 and the driving shaft 1 ... driving The belt drive assembly 14 includes an active transmission mechanism and a driven transmission mechanism. The power assembly 15 is fixed in the casing 11 and drives the active transmission belt 146 in the active transmission mechanism to rotate. The active transmission belt 146 drives the driven transmission belt 143 in the driven transmission mechanism to rotate. The presser foot driver 132 is connected to the driven transmission belt 143 and is driven by the driven transmission belt 143 to move up and down along the presser foot drive shaft 131 and the driving shaft 12. The needle bar presser foot assembly 16 and the presser foot driver 132 are detachably fixed.

[0025] The presser foot driving assembly 13 further includes a pressing plate 133 , which is detachably fixed to one side of the presser foot driver 132 and presses and fixes the driven transmission belt 143 to the outer wall of the presser foot driver 132 .

[0026] The side edges of the presser foot driver 132 close to the driven transmission belt 143 are parallelly provided with ridges 1322 , a belt clamping groove is formed between the ridges 1322 , and the driven transmission belt 143 is located in the belt clamping groove.

[0027] The upper and lower ends of the convex ridge portion 1322 are respectively provided with end protrusions 1323 , and a pressure plate clamping groove is formed between the end protrusions 1323 of the same convex ridge portion 1322 , and the pressure plate 133 is located in the pressure plate clamping groove.

[0028] The driven transmission mechanism includes a driven pulley fixing pin 141, a transmission mechanism support 142, a driven transmission belt 143 and a presser foot driven pulley 145. The transmission mechanism support 142 is fixed in the housing 11. A plurality of driven pulley fixing pins 141 are respectively fixed on the same side of the transmission mechanism support 142. A plurality of presser foot driven pulleys 145 are respectively rotatably fixed on the driven pulley fixing pin 141 through bearings. At least two presser foot driven pulleys 145 are located on the same vertical line parallel to the presser foot driving shaft 131. The driven transmission belt 143 is sleeved on the presser foot driven pulley 1 45, the active transmission mechanism includes a presser foot transmission pulley 144 and an active transmission belt 146, the power assembly 15 includes a motor seat fixing plate 151 and a closed-loop motor 152, the motor seat fixing plate 151 is located on the rear side of the transmission mechanism support 142, the closed-loop motor 152 is fixed on the rear side of the motor seat fixing plate 151, the presser foot transmission pulley 144 is located in the opening 1421 of the transmission mechanism support 142 and is connected to the output shaft of the closed-loop motor 152, and the active transmission belt 146 is sleeved on the outside of the presser foot transmission pulley 144 and one of the presser foot driven pulleys 145.

[0029] The active transmission mechanism further includes a tensioning wheel 147 and a tensioning wheel pin 148. The tensioning wheel pin 148 is fixed on the transmission mechanism support 142 and is located on the same side as the driven pulley fixing pin 141. The tensioning wheel 147 is rotatably fixed on the tensioning wheel pin 148 via a bearing.

[0030] The needle bar presser foot assembly 16 includes a presser foot fixing shaft 161, a presser foot positioning block 162 and a presser foot body 163. The presser foot fixing shaft 161 can be slidably arranged up and down in the shaft hole 211 of the frame body 21 of the needle bar frame 2 and is parallel to the presser foot driving shaft 131. The presser foot positioning block 162 is fixed to the upper end of the presser foot fixing shaft 161. The presser foot positioning block 162 is snap-connected with the presser foot driver 132. The presser foot body 163 is fixed to the bottom end of the presser foot fixing shaft 161.

[0031] A sliding sleeve 1621 is provided on the side of the presser foot positioning block 162 , an embroidery needle assembly 22 is vertically provided in the needle bar frame 2 , a needle bar 221 of the embroidery needle assembly 22 is parallel to the presser foot fixing shaft 161 , and the sliding sleeve 1621 is slidably fixed on the needle bar 221 .

[0032] A clamping plate 1321 is disposed on the outer wall of the presser foot driver 132 , and a clamping block 1622 is disposed on the outer wall of the presser foot positioning block 162 . The clamping block 1622 is fixedly engaged with the clamping plate 1321 .

[0033] Working process of the present invention:

[0034] During operation, the closed-loop motor 152 drives the presser foot drive pulley 144 to rotate through the output shaft, thereby driving one of the presser foot driven pulleys 145 to rotate through the active drive belt 146, and then driving the driven drive belt 143 and the remaining presser foot driven pulleys 145 to rotate. A vertically arranged driven drive belt 143 located between the two presser foot driven pulleys 145 drives the presser foot driver 132 fixed thereon to move up and down along the active shaft 12 and the presser foot drive shaft 131, thereby driving the presser foot body 163 located at the bottom end of the presser foot fixed shaft 161 to move up and down to the desired position through the presser foot positioning block 162, thereby realizing the rapid adjustment of the height of the presser foot body 163.

[0035] The present invention drives the active transmission belt in the active transmission mechanism to rotate through a closed-loop motor, and then drives the driven transmission belt to rotate through the active transmission belt, so that the presser foot driver fixed on the vertical belt section of the driven transmission belt moves up and down along the active shaft and the presser foot driving shaft, so that the needle bar presser foot assembly can be quickly adjusted to move up and down to any suitable position according to the needs of different embroidery products, and the overall transmission efficiency is high and the adjustment accuracy is large. In addition, the double-belt structure can make the overall force more uniform, and replacement is more convenient in subsequent maintenance; by arranging a convex ridge portion on the presser foot driver and forming a belt clamping groove, it is convenient to install and position the driven transmission belt; by arranging an end convex block on the convex ridge portion and forming a pressure plate clamping groove, the connection stability between the presser foot driver and the pressure plate is effectively enhanced; by arranging a presser foot positioning block, the height of the presser foot body is effectively positioned; by arranging a sliding sleeve on the presser foot positioning block, the presser foot assembly can slide up and down along the needle bar during the up and down movement, thereby improving the stability of the movement.

[0036] The above embodiments are intended to illustrate the present invention, not to limit the present invention. Any solution that is a simple transformation of the present invention belongs to the protection scope of the present invention.

Claims

1. A double-belt presser foot lifting mechanism, characterized in that: The invention comprises a presser foot drive assembly (13), a belt transmission assembly (14), a power assembly (15) and a needle bar presser foot assembly (16), wherein the presser foot drive assembly (13) comprises a presser foot drive shaft (131) and a presser foot driver (132), wherein the presser foot drive shaft (131) is vertically fixed in a housing (11) of a machine head (1) and is parallel to a driving shaft (12), wherein the presser foot driver (132) is slidably fixed on the presser foot drive shaft (131) and the driving shaft (12), wherein the belt transmission assembly (14) comprises an active transmission mechanism and a driven transmission mechanism, wherein the power assembly (15) is fixed in the housing (11) and drives an active transmission belt (146) in the active transmission mechanism to rotate, wherein the active transmission belt (146) is driven by the active transmission mechanism to rotate. The transmission belt (146) drives the driven transmission belt (143) in the driven transmission mechanism to rotate. The presser foot driver (132) is connected to the driven transmission belt (143) and is driven by the driven transmission belt (143) to move up and down along the presser foot driving shaft (131) and the driving shaft (12). The needle bar presser foot assembly (16) is detachably fixed to the presser foot driver (132). The presser foot driving assembly (13) further includes a pressing plate (133). The pressing plate (133) is detachably fixed to one side of the presser foot driver (132) and presses and fixes the driven transmission belt (143) on the outer wall of the presser foot driver (132). The presser foot driver (132) is close to the driven transmission belt (143). The side edges of the presser foot are respectively provided with convex ridges (1322) in parallel, a belt clamping groove is formed between the convex ridges (1322), the driven transmission belt (143) is located in the belt clamping groove, the driven transmission mechanism comprises a driven pulley fixing pin (141), a transmission mechanism support (142), a driven transmission belt (143) and a presser foot driven pulley (145), the transmission mechanism support (142) is fixed in the housing (11), a plurality of driven pulley fixing pins (141) are respectively fixed on the same side of the transmission mechanism support (142), a plurality of presser foot driven pulleys (145) are respectively rotatably fixed on the driven pulley fixing pin (141) through bearings, and at least two of the presser foot driven pulleys (145) are rotatably fixed on the driven pulley fixing pin (141) through bearings. 45) are located on the same vertical line parallel to the presser foot drive shaft (131), the driven transmission belt (143) is sleeved outside the presser foot driven pulley (145), the active transmission mechanism includes a presser foot transmission pulley (144) and an active transmission belt (146), the power assembly (15) includes a motor seat fixing plate (151) and a closed-loop motor (152), the motor seat fixing plate (151) is located on the rear side of the transmission mechanism support (142), the closed-loop motor (152) is fixed on the rear side of the motor seat fixing plate (151), the presser foot transmission pulley (144) is located in the opening (1421) of the transmission mechanism support (142) and is connected to the output shaft of the closed-loop motor (152),The active transmission belt (146) is sleeved outside the presser foot transmission pulley (144) and one of the presser foot driven pulleys (145).

2. A double-belt presser foot lifting mechanism as claimed in claim 1, characterized in that: The upper and lower ends of the convex ridge portion (1322) are respectively provided with end protrusions (1323), and a pressure plate clamping groove is formed between the end protrusions (1323) of the same convex ridge portion (1322), and the pressure plate (133) is located within the pressure plate clamping groove.

3. A double-belt presser foot lifting mechanism as claimed in claim 1, characterized in that: The active transmission mechanism further comprises a tensioning wheel (147) and a tensioning wheel pin (148); the tensioning wheel pin (148) is fixed on the transmission mechanism support (142) and is located on the same side as the driven pulley fixing pin (141); the tensioning wheel (147) is rotatably fixed on the tensioning wheel pin (148) via a bearing.

4. A double-belt presser foot lifting mechanism as claimed in claim 1, characterized in that: The needle bar presser foot assembly (16) comprises a presser foot fixing shaft (161), a presser foot positioning block (162) and a presser foot body (163); the presser foot fixing shaft (161) is slidably arranged in an axial hole (211) of a frame body (21) of the needle bar frame (2) and is parallel to the presser foot driving shaft (131); the presser foot positioning block (162) is fixed to the upper end of the presser foot fixing shaft (161); the presser foot positioning block (162) is engaged with the presser foot driver (132); and the presser foot body (163) is fixed to the bottom end of the presser foot fixing shaft (161).

5. A double-belt presser foot lifting mechanism as claimed in claim 4, characterized in that: A sliding sleeve (1621) is provided on the side of the presser foot positioning block (162), an embroidery needle assembly (22) is vertically provided in the needle bar frame (2), the needle bar (221) of the embroidery needle assembly (22) is parallel to the presser foot fixing shaft (161), and the sliding sleeve (1621) is slidably fixed on the needle bar (221).

6. A double-belt presser foot lifting mechanism as claimed in claim 4, characterized in that: A clamping plate (1321) is provided on the outer wall of the presser foot driver (132), and a clamping block (1622) is provided on the outer wall of the presser foot positioning block (162), wherein the clamping block (1622) is clamped and fixed to the clamping plate (1321).

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