Expansion type tensioning driving mechanism

Abstract

The utility model relates to an expansion type tensioning driving mechanism which comprises a belt wheel seat used for installing a belt wheel, a belt wheel base connected with one end of a sliding rail in a matched mode, a tensioning structure used for adjusting the position of at least one end of the belt wheel seat, and a guide fixing structure arranged between the belt wheel seat and the belt wheel base and used for guiding the belt wheel seat to move. The belt wheel seat is slidably connected to the belt wheel base through an adjusting guide block, the tensioning structure comprises an adjusting jacking block arranged on one side of the belt wheel seat and a tensioning screw rod arranged on the other side of the belt wheel seat, and the tensioning screw rod acts on the adjusting jacking block to enable the belt wheel seat to move; the guiding and fixing structure comprises a guiding and fixing pin and a jacking pin rod jacking the guiding and fixing pin to fasten the belt wheel base, and guiding grooves for containing the guiding and fixing pin are formed in the corresponding positions of the belt wheel base and the belt wheel base. The device is easy to install and convenient to adjust, and the tightness of the synchronous belt arranged on the belt wheel can be adjusted according to needs.

Description

Technical Field

[0001] The utility model relates to the technical field of embroidery frame driving of embroidery machines, in particular to an expansion type tension driving mechanism. Background Art

[0002] When embroidering patterns, the embroidery machine usually needs to move the embroidery frame so that the needle can work on the embroidery material to form different patterns. The driving device of the embroidery frame is usually equipped with a driving trolley, which moves on the slide rail below it to drive the embroidery frame to move. The driving trolley is driven by a synchronous belt, and driving wheels are installed on both sides of the synchronous belt. The rotation of the driving wheel drives the synchronous belt to move, and then the driving trolley drives the embroidery frame to move.

[0003] The synchronous belt is installed on the guide rail through at least one driving wheel and at least one transmission wheel. Usually, the driving wheel or the distance between the driving wheel and the transmission wheel needs to be adjusted to control the tension. In addition, the synchronous belt is made of elastic material. After long-term use, it will not be tight enough due to long-term pulling. The tension of the synchronous belt greatly affects the efficiency of power transmission. The tension needs to be adjusted in time to avoid affecting the use effect. When new and old synchronous belts are installed on the rotating driving wheel, the tension is different and needs to be adjusted at any time. The existing synchronous belt tension adjustment of the driving trolley requires the complete disassembly of the pulley assembly on one side or both sides, and the adjustment is made by reinstalling the bolts in the waist groove. The adjustment is not convenient and the tension control is not accurate enough. Summary of the invention

[0004] In order to solve the above-mentioned defects of the prior art, the utility model provides an expansion type tensioning drive mechanism which is simple to adjust and convenient to install.

[0005] The technical solutions adopted are as follows:

[0006] An expansion type tensioning drive mechanism comprises a slide rail, a pulley seat for mounting a pulley, a pulley base connected to one end or both ends of the slide rail, and also comprises a tensioning structure for adjusting the position of the pulley seat at at least one end and a guide fixing structure arranged between the pulley seat and the pulley base and guiding the movement of the pulley seat. The pulley seat is slidably connected to the pulley base through an adjusting guide block. The tensioning structure comprises an adjusting tightening block arranged on the pulley seat and a tensioning screw matched with the adjusting tightening block. The pulley seat is provided with a thread matched with the tensioning screw and enables the tensioning screw to act on the adjusting tightening block to move the pulley seat.

[0007] Furthermore, the guide fixing structure includes a guide fixing pin arranged between the pulley seat and the pulley base.

[0008] Furthermore, the guide fixing structure also includes a stop guide fixing pin, a front baffle and a rear baffle to prevent falling off; the corresponding parts of the pulley seat and the pulley base are provided with a guide groove for accommodating the guide fixing pin; the thread can be a nut or a screw hole.

[0009] Furthermore, the adjusting and tightening block is installed on the pulley base close to the end of the slide rail, and the end of the tensioning screw rod cooperates with the adjusting and tightening block.

[0010] Furthermore, a groove matching with the protrusion inside the slide rail is provided below the pulley base; the tensioning structure, the guide fixing structure and the adjustment guide block are arranged at one end of the slide rail, and the other end of the slide rail is a fixed pulley seat.

[0011] Furthermore, the pulley base is provided with a slide groove for the adjustment guide block to slide; the adjustment guide block is arranged at the bottom of the pulley base.

[0012] Furthermore, the adjusting guide block is provided with a protrusion which cooperates with the slide groove and can slide in the slide groove, and the height of the protrusion is consistent with the thickness of the pulley base.

[0013] Furthermore, the front baffle is arranged at the front end of the pulley seat; and the rear baffle is arranged at the rear end of the pulley seat.

[0014] Furthermore, two slide grooves may be provided, and the two slide grooves are symmetrically arranged on both sides of the guide groove.

[0015] Furthermore, the guide fixing pin is a hollow expansion pin, in which a tightening pin rod of the expandable guide fixing pin is arranged; and the guide fixing pin is an elastic pin.

[0016] Compared with the prior art, the beneficial effects produced by the utility model are:

[0017] The utility model provides an expansion type tension driving mechanism, including a slide rail, a pulley seat, a pulley base connected with one end or both ends of the slide rail, and also includes a tensioning structure for adjusting the position of the pulley seat at least at one end and a guide fixing structure arranged between the pulley seat and the pulley base and guiding the pulley seat to move. The pulley seat is slidably connected to the pulley base through an adjustment guide block. The thread on the pulley seat can be matched with the tensioning screw on the tensioning structure, and combined with the top tightening block, the tensioning screw can adjust the pulley seat to slide on the pulley base, thereby changing the position of the pulley seats at both ends of the slide rail, so as to achieve the purpose of adjusting the tension of the belt or synchronous belt on the pulleys at both ends of the slide rail.

[0018] The tensioning screw is rotated to tighten the adjusting tightening block inwards to move the pulley seat outwards and tighten the synchronous belt. The operation is convenient. The guide fixing structure includes a guide fixing pin and a tightening pin rod arranged between the pulley seat and the pulley base. The corresponding parts of the pulley seat and the pulley base are provided with a guide groove for accommodating the guide fixing pin. The guide fixing pin and the guide groove can guide the movement of the pulley seat to prevent the pulley seat from tilting when moving, which affects the tension and movement of the synchronous belt. The guide fixing pin can be an elastic pin. The tightening pin rod tightens the guide fixing pin, so that the guide fixing pin is deformed and has an interference fit with the guide groove, so that the pulley seat is more tightly fixed on the pulley base, not easy to fall off, and has a better effect.

[0019] The utility model can adjust the tightness of the synchronous belt according to actual needs, and is easy to install and simple to adjust. The position of the pulley seat at at least one end can be adjusted by rotating the tensioning screw rod, and the pulley seat can be fixed on the pulley base by rotating the tensioning pin rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The overall assembly diagram of the utility model;

[0021] Figure 2 This is a disassembly diagram of the tensioning drive mechanism of the utility model;

[0022] Figure 3 It is a side sectional view of the tensioning drive mechanism of the utility model;

[0023] Figure 4 It is a structural schematic diagram of the tensioning drive mechanism of the utility model;

[0024] Among them, the pulley 1, the pulley seat 2, the pulley base 3, the slide rail 4, the tensioning structure 5, the adjusting top tightening block 501, the tensioning screw 502, the guide fixing structure 6, the guide fixing pin 601, the front baffle 602, the rear baffle 603, the top tightening pin 604, the adjusting guide block 7, the slide groove 8, the thread 9, and the guide groove 10. DETAILED DESCRIPTION

[0025] The present invention will be further described below in conjunction with specific embodiments.

[0026] In the description of the present invention, it should be understood that the terms "front", "rear", "outer", "inner" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, and should not be understood as limiting the present invention. The front end refers to the end close to the slide rail 4, and the rear end refers to the end away from the slide rail 4.

[0027] Referring to Figures 1, 2, 3, and 4, an expansion type tensioning drive mechanism includes a pulley seat 2 for mounting a pulley 1, a pulley base 3 connected to one or both ends of a slide rail 4, and also includes a tensioning structure 5 for adjusting the position of at least one end of the pulley seat 2 and a guide fixing structure 6 for guiding the movement of the pulley seat, which is arranged between the pulley seat and the pulley base 2. The pulley seat 2 is slidably connected to the pulley base 3 by adjusting a guide block 7.

[0028] Furthermore, the tensioning structure 5 includes an adjusting clamping block 501 arranged on one side of the pulley seat 2 and a tensioning screw 502 arranged on the other side. The pulley seat 2 is provided with a thread 9 that cooperates with the tensioning screw 502 and enables the tensioning screw to act on the adjusting clamping block to move the pulley seat.

[0029] As a further preference, the thread 9 can be a screw hole or a nut. The nut can be directly welded to the pulley seat 2, or a screw hole can be provided. The tensioning screw 502 can pass through the screw hole or the nut to be tightened to the adjusting and tightening block 501, and the pulley seat 2 can be moved away from the adjusting and tightening block by rotation.

[0030] Furthermore, the adjusting and tightening block 501 is installed on one end of the tensioning wheel base 3 close to the slide rail 4 , and the installation position should be aligned with the screw hole 9 so that the tensioning screw 502 can pass through the screw hole 9 to act on the adjusting and tightening block 501 .

[0031] Furthermore, the guide fixing structure 6 includes a guide fixing pin 601, a front baffle 602 and a rear baffle 603 for stopping the guide fixing pin 601 from falling off, and a tensioning pin rod 604 that passes through the rear baffle 603 and pushes onto the guide fixing pin 601 to fasten the pulley seat 2. The corresponding parts of the pulley seat 2 and the pulley base 3 are provided with a guide groove 10 for accommodating the guide fixing pin 601. The guide fixing pin 601 is arranged in the guide groove 10, and the tensioning pin rod 604 is connected to the rear baffle to act on the guide fixing pin 601 to fix the pulley seat 2. In addition, the provision of the guide fixing structure 6 can make the pulley seat 2 move in the direction of the guide groove 10, so as not to be skewed and affect the movement and tensioning of the synchronous belt.

[0032] As a further preferred embodiment, the guide fixing pin 601 is an elastic pin, and after the tensioning pin rod 604 tensions the guide fixing pin 601, the guide fixing pin 601 is deformed and interference fits with the guide groove 10, so that the pulley seat 2 is more tightly fixed on the pulley base 3. The diameter of the guide groove 10 should not be too large compared to the diameter of the guide fixing pin 601, and it should be ensured that the guide fixing pin 601 can be interference fit with the guide groove after deformation.

[0033] Furthermore, the adjusting and tightening block 501 is installed at one end of the pulley base 3 close to the slide rail 4 , and the installation position should be aligned with the thread 9 so that the tensioning screw 502 can act on the tightening block 501 through the thread 9 .

[0034] Further, a groove matching with the internal protrusion of the slide rail 4 is provided below the pulley base 3. The pulley base 3 is partially arranged inside the slide rail 4, and the groove is provided, so that the connection is tighter and not easy to fall off.

[0035] Furthermore, the pulley base 3 is provided with a slide groove 8 for sliding the adjustment guide block 7. Two slide grooves 8 can be provided, and the two slide grooves 8 are symmetrically arranged on both sides of the guide groove 10.

[0036] Further, the adjustment guide block 7 can be connected to the pulley seat 2 by threads. The adjustment guide block 7 is provided with a protrusion that matches with the slide groove 8 and can slide in the slide groove. Preferably, the height of the protrusion is consistent with the thickness of the pulley base 3. The height of the protrusion is consistent with the thickness of the pulley base 3, and the adjustment guide block 7 is connected below the pulley seat 2, which can ensure that the bottom part of the pulley seat 2 is in contact with the pulley base 3, and the fixing effect is better.

[0037] Furthermore, the front stopper 602 is disposed at the front end of the pulley seat 2 to prevent the guide fixing pin 601 from falling from the front end.

[0038] Furthermore, the rear baffle 603 is arranged at the rear end of the pulley base 3 to prevent the guide fixing pin 601 from falling from the rear end. At the same time, the range of motion of the pulley seat 2 is limited to prevent the pulley seat 2 from falling off. The rear baffle is also provided with a hole and a fixing screw for the top pin 604 to pass through.

[0039] Furthermore, the tensioning drive mechanism can be arranged at one end or both ends of the slide rail. If the tensioning drive mechanism is arranged at both ends, both ends can adjust the tension of the synchronous belt; if the tensioning drive mechanism is arranged at one end, a fixed driving wheel can be arranged at the end of the slide rail without the tensioning drive mechanism, and a synchronous belt is arranged on the driving wheel and the pulley. The tension is adjusted by the tensioning drive mechanism, and the driving wheel is fixed.

[0040] The utility model provides an expansion type tension driving mechanism, comprising a pulley seat for installing a pulley, a pulley base installed at the end of a slide rail, and the pulley seat is slidably connected to the pulley base through an adjustment guide block. Since a fixed driving wheel is provided at one end of both ends of the slide rail, and a pulley is provided at the other end, and a synchronous belt is provided on the driving wheel and the pulley, the rotation of the two wheels drives the synchronous belt to move, and the tightness of the synchronous belt can be adjusted by changing the position of the pulley seat.

[0041] The pulley seat is provided with a tensioning structure for adjusting the position of at least one end of the pulley seat and a guiding fixing structure arranged between the pulley seat and the pulley base and guiding the pulley seat to move. The tensioning structure includes an adjusting top tightening block arranged on one side of the pulley seat and a tensioning screw arranged on the other side. The pulley seat is moved outward by rotating the tensioning screw to tighten the adjusting top tightening block inward, thereby tightening the synchronous belt, which is convenient to operate. The guiding fixing structure includes a guiding fixing pin and a tensioning pin rod arranged between the pulley seat and the pulley base. The corresponding parts of the pulley seat and the pulley base are provided with a guiding groove for accommodating the guiding fixing pin. The guiding fixing pin and the guiding groove can guide the pulley seat to move, thereby preventing the pulley seat from tilting when moving, thereby affecting the tensioning and movement of the synchronous belt. The guiding fixing pin can be an elastic pin, and the tensioning pin rod tightens the guiding fixing pin, so that the guiding fixing pin is deformed and interference fits with the guide groove, so that the pulley seat is more tightly fixed on the pulley base, not easy to fall off, and has a better effect.

[0042] The utility model can adjust the tightness of the synchronous belt according to actual needs, and is easy to install and simple to adjust. The position of the pulley seat at at least one end can be adjusted by rotating the tensioning screw rod, and the pulley seat can be fixed on the pulley base by rotating the tensioning pin rod.

[0043] The above description is only an optional embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. An expansion type tensioning drive mechanism, characterized in that: The invention comprises a slide rail (4), a pulley seat (2) for mounting a pulley (1), a pulley base (3) connected to one or both ends of the slide rail (4), a tensioning structure (5) for adjusting the position of at least one end of the pulley seat (2), and a guide fixing structure (6) arranged between the pulley seat (2) and the pulley base (3) and guiding the pulley seat (2) to move. The pulley seat (2) is slidably connected to the pulley base (3) through an adjusting guide block (7). The tensioning structure (5) comprises an adjusting top tightening block (501) arranged on the pulley seat (2) and a tensioning screw (502) matched with the adjusting top tightening block (501). The pulley seat (2) is provided with a thread (9) matched with the tensioning screw (502) so that the tensioning screw can act on the adjusting top tightening block to move the pulley seat.

2. The expansion type tension driving mechanism according to claim 1, characterized in that: The guide fixing structure (6) comprises a guide fixing pin (601) arranged between the pulley seat (2) and the pulley base (3).

3. The expansion type tension driving mechanism according to claim 2, characterized in that: The guide fixing structure (6) further comprises a stop guide fixing pin (601), a front baffle (602) and a rear baffle (603) for preventing the guide fixing pin from falling off; corresponding portions of the pulley seat (2) and the pulley base (3) are provided with a guide groove (10) for accommodating the guide fixing pin (601); and the thread (9) can be a nut or a screw hole.

4. The expansion type tension driving mechanism according to claim 1, characterized in that: The adjusting and tightening block (501) is installed on the pulley base (3) close to the end of the slide rail (4), and the end of the tensioning screw (502) cooperates with the adjusting and tightening block (501).

5. The expansion type tension driving mechanism according to claim 1, characterized in that: A groove matching the internal protrusion of the slide rail (4) is provided below the pulley base (3); the tensioning structure (5), the guide fixing structure (6) and the adjustment guide block (7) are arranged at one end of the slide rail (4), and the other end of the slide rail (4) is a fixed pulley seat.

6. The expansion type tension driving mechanism according to claim 1, characterized in that: The pulley base (3) is provided with a slide groove (8) for the adjustment guide block (7) to slide; the adjustment guide block (7) is arranged at the bottom of the pulley base (3).

7. The expansion type tension driving mechanism according to claim 6, characterized in that: The adjusting guide block (7) is provided with a protrusion which cooperates with the slide groove (8) and can slide in the slide groove, and the height of the protrusion is consistent with the thickness of the pulley base (3).

8. The expansion type tension driving mechanism according to claim 3, characterized in that: The front baffle (602) is arranged at the front end of the pulley seat (2); and the rear baffle (603) is arranged at the rear end of the pulley seat (3).

9. The expansion type tension driving mechanism according to claim 6, characterized in that: Two slide grooves (8) may be provided, and the two slide grooves (8) are symmetrically arranged on both sides of the guide groove (10).

10. The expansion type tension driving mechanism according to claim 2, characterized in that: The guide fixing pin (601) is a hollow expansion pin, and a tightening pin rod (604) for expanding the guide fixing pin is arranged inside the hollow expansion pin; the guide fixing pin (601) is an elastic pin.

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