Transmission connecting rod of flat seaming machine

Abstract

The utility model belongs to the technical field of accessories of flat seaming machines, and relates to a transmission connecting rod of a flat seaming machine, which comprises a connecting rod, a first connecting end part and a second connecting end part which are integrally forged, the connecting rod is cylindrical, the first connecting end part and the second connecting end part are of T-shaped structures and are respectively forged into flat shapes, and the first connecting end part and the second connecting end part are respectively connected with the first connecting end part and the second connecting end part. The flat thickness of the first connecting end part and the second connecting end part is not larger than the radial size of the connecting rod, the outer side of the first connecting end part is detachably connected with a first locking piece for assembling the first connecting assembly in a combined mode, and the outer side of the second connecting end part is detachably connected with a second locking piece for assembling the second connecting assembly in a combined mode. The transmission connecting rod of the flat seaming machine has the advantages of being simple in structure, convenient to install and high in product stability and precision.

Description

Technical Field

[0001] The utility model belongs to the technical field of interlock sewing machine accessories and relates to a transmission connecting rod of the interlock sewing machine. Background Art

[0002] The transmission connecting rod is an internal transmission part of the transmission part of the four-needle six-thread interlock sewing machine. This part is often used in high-speed rotation and wear-prone occasions. The transmission connecting rod requires a specific angle in the transmission assembly to obtain the required transmission function and will not hinder the normal working trajectory of other internal parts. The existing transmission connecting rod includes a screw with external threads at both ends. The two ends of the screw are respectively screwed to the transmission connecting parts. By changing the degree of screw connection, the angle and center distance between the two transmission connecting parts can be changed. During the assembly process, a special tooling fixture is required to ensure the angle of the assembly connecting rod and adjust the center distance.

[0003] The shortcomings of this type of transmission connecting rod are: it requires the use of special tooling fixtures, which increases costs and is cumbersome to assemble; it is difficult to accurately control product precision by manually adjusting the center distance and angle, which can easily cause poor operation and product damage to the subsequent entire set of products; the product uses nuts to cooperate with the self-locking performance of the center distance and angle. This product is a transmission connecting rod. Under the long-term high-speed operation of the interlock sewing machine, the nuts and screws are prone to loosening and causing the accessories to shift. In severe cases, the connecting rod may bend or break, thereby damaging the machine. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a transmission connecting rod for a stretch sewing machine, which has the advantages of simple structure, convenient installation, high product stability and high precision.

[0005] In order to solve the above technical problems, the purpose of the utility model is achieved through the following technical solutions:

[0006] A transmission connecting rod of a stretch sewing machine includes a connecting rod, a first connecting end and a second connecting end which are forged in one piece. The connecting rod is cylindrical, the first connecting end and the second connecting end are T-shaped structures and are forged into a flat shape respectively, the flat thickness of the first connecting end and the second connecting end is not greater than the radial dimension of the connecting rod, the outer side of the first connecting end is detachably connected with a first locking piece of a combined assembly of a first connecting component, and the outer side of the second connecting end is detachably connected with a second locking piece of a combined assembly of a second connecting component.

[0007] In the above-mentioned transmission connecting rod of a sewing machine, the first locking member and the first connecting end have matching shapes and are detachably connected through a fastener, and semicircular grooves are provided on the opposite surfaces of the first locking member and the first connecting end, and the semicircular grooves are combined to form a circular groove for assembling the first connecting component; the second locking member and the second connecting end have matching shapes and are detachably connected through a fastener, and semicircular grooves are provided on the opposite surfaces of the second locking member and the second connecting end, and the semicircular grooves are combined to form a circular groove for assembling the second connecting component.

[0008] In the above-mentioned transmission connecting rod of a sewing machine, the fasteners are arranged in pairs, and the first locking member, the first connecting end, the second locking member and the left and right sides of the second connecting end are respectively axially provided with mounting holes that cooperate with the fasteners; the fasteners are preferably bolts, and the fasteners can be installed from the inside to the outside or from the outside to the inside. When installed from the inside to the outside, avoidance grooves can be provided on the sides of the first connecting end and the second connecting end.

[0009] In the above-mentioned transmission connecting rod of the interlock sewing machine, the connecting rod, the first connecting end portion and the second connecting end portion are integrally forged from a copper piece.

[0010] In the above-mentioned transmission connecting rod of a flat sewing machine, the first locking member, the first connecting end, the second locking member and the second connecting end are all flat structures with the same flat thickness; preferably, the opposite surfaces of the first locking member and the first connecting end have the same shape and size; the opposite surfaces of the second locking member and the second connecting end have the same shape and size.

[0011] The utility model can be used for various transmission connecting rods in interlock sewing machines:

[0012] The first connecting end portion and the second connecting end portion are located in the same plane, the first connecting component and the second connecting component are both ball head components, and the rods of the ball head components have the same orientation.

[0013] Alternatively, the planes where the first connecting end portion and the second connecting end portion are located have a deflection angle, the first connecting component and the second connecting component are both ball head components, and the rods of the ball head components are arranged on different sides.

[0014] Alternatively, the planes where the first connecting end and the second connecting end are located have a deflection angle, the first connecting component is a ball head component, the second connecting component is an eccentric bearing component, and the first connecting end is provided with a limiting structure that cooperates with the ball head component.

[0015] Alternatively, the planes where the first connecting end and the second connecting end are located have a deflection angle, the first connecting component is a ball head component, the second connecting component is an eccentric bearing component, a connecting sleeve is formed on the eccentric bearing component, and the connecting sleeve and the rod of the ball head component are arranged on the same side.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] 1. The utility model provides a transmission connecting rod of a stretch sewing machine, which adopts an integrated and standardized transmission connecting rod, and forms standardized parameters such as angle and center distance during casting. When in use, it is no longer necessary to adjust the angle and center distance through a special fixture, which is convenient for assembly and ensures accuracy. In addition, with the development demand of standardized production, the center distance and deflection angle of the transmission connecting rod on the existing stretch sewing machine are unified, and there is no deviation between the integrated transmission connecting rod provided by the utility model and the market.

[0018] 2. Since the utility model no longer uses a threaded connection structure, the connecting rod of the transmission connecting rod can be larger in size, thereby increasing the structural strength of the connection part and increasing the safety of the product. Moreover, the integrated structure of the utility model has better stability and will never loosen under the long-term high-speed movement of the interlock sewing machine.

[0019] 3. By setting connecting ends with different deflection angles and center distances, and by setting connecting components with different structures, the utility model can be applied to various transmission connecting rods on interlock sewing machines. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional diagram of embodiment 1 of the utility model;

[0021] Figure 2 It is a stereogram of Embodiment 2 of the present utility model;

[0022] Figure 3 It is a three-dimensional diagram of embodiment 3 of the utility model;

[0023] Figure 4 It is a three-dimensional diagram of embodiment 4 of the utility model;

[0024] Figure numerals: 1, connecting rod; 2, first connecting end; 3, second connecting end; 4, first connecting assembly; 5, first locking member; 6, second connecting assembly; 7, second locking member; 8, fastener; 9, limiting structure; 10, connecting sleeve. DETAILED DESCRIPTION

[0025] The present invention will be further described below with reference to the accompanying drawings. Figure 1-4 :

[0026] A transmission connecting rod of a stretch sewing machine includes a connecting rod 1, a first connecting end 2 and a second connecting end 3 which are forged in one piece, wherein the connecting rod 1 is cylindrical, the first connecting end 2 and the second connecting end 3 are T-shaped structures and are forged into flat shapes respectively, the flat thickness of the first connecting end 2 and the second connecting end 3 is not greater than the radial dimension of the connecting rod 1, the outer side of the first connecting end 2 is detachably connected with a first locking piece 5 which is assembled with a first connecting component 4, and the outer side of the second connecting end 3 is detachably connected with a second locking piece 7 which is assembled with a second connecting component 6.

[0027] According to the connecting rod specifications required by the interlock sewing machine, the deflection angle and center distance of the first connecting end 2 and the second connecting end 3 are set, and then the standardized parts including the connecting rod 1, the first connecting end 2 and the second connecting end 3 are forged in one piece. After the forging is completed, the deflection angle and center distance of the first connecting end 2 and the second connecting end 3 remain fixed and can be directly used for subsequent assembly. Thereafter, the first connecting component 4 and the second connecting component 6 are assembled in conjunction with the first locking piece 5 and the second locking piece 7 to form a complete transmission connecting rod.

[0028] Its specific assembly structure is: the first locking member 5 and the first connecting end 2 have a matching shape and are detachably connected through a fastener 8, and semicircular grooves are provided on the opposite surfaces of the first locking member 5 and the first connecting end 2, and the semicircular grooves are combined to form a circular groove for assembling the first connecting component 4; the second locking member 7 and the second connecting end 3 have a matching shape and are detachably connected through a fastener 8, and semicircular grooves are provided on the opposite surfaces of the second locking member 7 and the second connecting end 3, and the semicircular grooves are combined to form a circular groove for assembling the second connecting component 6.

[0029] Furthermore, the fasteners 8 are arranged in pairs, and the left and right sides of the first locking member 5, the first connecting end 2, the second locking member 7 and the second connecting end 3 are respectively axially provided with mounting holes that cooperate with the fasteners 8; the fasteners 8 are preferably bolts, and the fasteners 8 can be installed from the inside to the outside or from the outside to the inside. When installed from the inside to the outside, avoidance grooves can be provided on the sides of the first connecting end 2 and the second connecting end 3.

[0030] Preferably, the connecting rod 1, the first connecting end portion 2 and the second connecting end portion 3 are integrally forged from copper.

[0031] In order to make the locking piece better match the connecting end, the first locking piece 5, the first connecting end 2, the second locking piece 7 and the second connecting end 3 are all flat structures with the same flat thickness; preferably, the opposing surfaces of the first locking piece 5 and the first connecting end 2 have the same shape and size; the opposing surfaces of the second locking piece 7 and the second connecting end 3 have the same shape and size.

[0032] Example 1

[0033] Compare with Figure 1 In the transmission connecting rod of the present embodiment, the first connecting end portion 2 and the second connecting end portion 3 are located in the same plane, the first connecting component 4 and the second connecting component 6 are both ball head components, and the rod portions of the ball head components have the same orientation, that is, the rod portions of the two ball head components are arranged on the same side. In the present embodiment, there is no deflection angle between the first connecting end portion 2 and the second connecting end portion 3, and the ball head components can rotate in their respective corresponding circular mounting grooves.

[0034] Example 2

[0035] Compare with Figure 2 In the transmission connecting rod of this embodiment, the plane where the first connecting end 2 and the second connecting end 3 are located has a deflection angle, and the first connecting component 4 and the second connecting component 6 are both ball head components, and the rod parts of the ball head components are arranged on different sides. In this embodiment, there is a specific deflection angle between the first connecting end 2 and the second connecting end 3, and the ball head components can rotate in their respective corresponding circular mounting grooves.

[0036] Example 3

[0037] Compare with Figure 3 In the transmission connecting rod of this embodiment, the plane where the first connection end 2 and the second connection end 3 are located has a deflection angle, the first connection component 4 is a ball head component, the second connection component 6 is an eccentric bearing component, and a limiting structure 9 that cooperates with the ball head component is provided on the first connection end 2. In this embodiment, there is a specific deflection angle between the first connection end 2 and the second connection end 3, the ball head component has limited rotation in its corresponding circular mounting groove, and other transmission components are inserted into the eccentric bearing.

[0038] Furthermore, the limiting structure 9 includes a limiting block with an open groove, and a limiting pin is provided at the end of the ball head assembly opposite to the rod portion. The limiting pin is slidably set in the open groove of the limiting block, and the ball head assembly rotates between positions limited by the open groove.

[0039] Example 4

[0040] Compare with Figure 4In the transmission connecting rod of this embodiment, the plane where the first connection end 2 and the second connection end 3 are located has a deflection angle, the first connection component 4 is a ball head component, and the second connection component 6 is an eccentric bearing component. A connecting sleeve 10 is formed on the eccentric bearing component, and the connecting sleeve 10 and the rod of the ball head component are arranged on the same side. In this embodiment, there is a specific deflection angle between the first connection end 2 and the second connection end 3, the ball head component rotates in its corresponding circular mounting groove, and the connecting sleeve 10 of the eccentric bearing is connected to other transmission components.

[0041] The above embodiments are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A transmission connecting rod of a flat sewing machine, characterized in that: The invention comprises a connecting rod (1), a first connecting end (2) and a second connecting end (3) which are forged in one piece, wherein the connecting rod (1) is cylindrical, the first connecting end (2) and the second connecting end (3) are T-shaped structures and are forged into a flat shape respectively, the flat thickness of the first connecting end (2) and the second connecting end (3) is not greater than the radial dimension of the connecting rod, the outer side of the first connecting end (2) is detachably connected to a first locking piece (5) of a first connecting component (4) assembled in combination, and the outer side of the second connecting end (3) is detachably connected to a second locking piece (7) of a second connecting component (6) assembled in combination.

2. The transmission connecting rod of the interlock sewing machine according to claim 1, characterized in that: The first locking member (5) and the first connecting end (2) have matching shapes and are detachably connected via a fastener (8); the first locking member (5) and the first connecting end (2) are provided with semicircular grooves on their opposing surfaces, and the semicircular grooves are combined to form a circular groove for assembling the first connecting component (4); the second locking member (7) and the second connecting end (3) have matching shapes and are detachably connected via a fastener (8); the second locking member (7) and the second connecting end (3) are provided with semicircular grooves on their opposing surfaces, and the semicircular grooves are combined to form a circular groove for assembling the second connecting component (6).

3. The transmission connecting rod of the interlock sewing machine according to claim 2, characterized in that: The fasteners (8) are arranged in pairs, and mounting holes matching the fasteners (8) are respectively arranged axially on the left and right sides of the first locking member (5), the first connecting end portion (2), the second locking member (7) and the second connecting end portion (3).

4. The transmission connecting rod of the interlock sewing machine according to claim 1, characterized in that: The connecting rod (1), the first connecting end portion (2) and the second connecting end portion (3) are integrally forged from a copper piece.

5. The transmission connecting rod of the interlock sewing machine according to claim 1, characterized in that: The first locking member (5), the first connecting end portion (2), the second locking member (7) and the second connecting end portion (3) are all flat structures with the same flat thickness.

6. The transmission connecting rod of the interlock sewing machine according to claim 1, characterized in that: The first connecting end (2) and the second connecting end (3) are located in the same plane, the first connecting component (4) and the second connecting component (6) are both ball head components, and the rods of the ball head components have the same orientation.

7. The transmission connecting rod of the interlock sewing machine according to claim 1, characterized in that: The planes where the first connecting end (2) and the second connecting end (3) are located have a deflection angle, and the first connecting component (4) and the second connecting component (6) are both ball head components, and the rods of the ball head components are arranged on different sides.

8. The transmission connecting rod of the interlock sewing machine according to claim 1, characterized in that: The planes on which the first connecting end (2) and the second connecting end (3) are located have a deflection angle, the first connecting component (4) is a ball head component, the second connecting component (6) is an eccentric bearing component, and the first connecting end (2) is provided with a limiting structure (9) that cooperates with the ball head component.

9. The transmission connecting rod of the interlock sewing machine according to claim 1, characterized in that: The planes on which the first connecting end (2) and the second connecting end (3) are located have a deflection angle, the first connecting component (4) is a ball head component, the second connecting component (6) is an eccentric bearing component, a connecting sleeve (10) is formed on the eccentric bearing component, and the connecting sleeve (10) and the rod of the ball head component are arranged on the same side.

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