阅读说明：本技术 一种挠性联轴器 (Flexible coupling ) 是由 钱进 吴渗楠 夏天 何冰 徐建新 于 2020-07-29 设计创作，主要内容包括：本发明涉及联轴器技术领域内的一种挠性联轴器,包括传动轴、卡块、中间轴以及扭簧；所述中间轴两端分别设置有卡槽,两组所述卡块分别与所述卡槽连接,位于所述卡槽内的所述卡块的端部与所述卡槽的底部间隔有容置位；所述传动轴的端部设置有球头,所述球头置入所述卡块内,所述球头与所述卡块分别设有轴孔和连接孔；所述扭簧套设于所述卡块与所述卡槽连接位置的所述中间轴上,所述扭簧的一端穿过所述连接孔与所述轴孔后,所述扭簧的另一端旋转预设角后从所述卡块和所述卡槽之间的容置位内穿过。本发明提供的可调心的挠性联轴器,解决了现有挠性联轴器结构复杂,体积较大,吸收不同心度小的问题。(The invention relates to a flexible coupling in the technical field of couplings, which comprises a transmission shaft, a clamping block, an intermediate shaft and a torsion spring, wherein the transmission shaft is connected with the clamping block; clamping grooves are formed in two ends of the intermediate shaft respectively, two groups of clamping blocks are connected with the clamping grooves respectively, and accommodating positions are formed at intervals between the end parts of the clamping blocks located in the clamping grooves and the bottoms of the clamping grooves; the end part of the transmission shaft is provided with a ball head, the ball head is placed in the clamping block, and the ball head and the clamping block are respectively provided with a shaft hole and a connecting hole; the middle shaft is sleeved with the torsion spring, the middle shaft is arranged at the connecting position of the clamping block and the clamping groove, one end of the torsion spring penetrates through the connecting hole and the shaft hole, and the other end of the torsion spring rotates by a preset angle and then penetrates through the accommodating position between the clamping block and the clamping groove. The flexible coupling capable of aligning provided by the invention solves the problems of complex structure, large volume and small absorption non-concentricity of the existing flexible coupling.)

1. A flexible coupling is characterized by comprising a transmission shaft (1), a clamping block (2), an intermediate shaft (3) and a torsion spring (4);

clamping grooves (30) are respectively formed in two ends of the intermediate shaft (3), two groups of clamping blocks (2) are respectively connected with the clamping grooves (30), and accommodating positions are arranged at intervals between the end parts of the clamping blocks (2) positioned in the clamping grooves (30) and the bottoms of the clamping grooves (30);

a ball head (10) is arranged at the end part of the transmission shaft (1), the ball head (10) is arranged in the fixture block (2), and the ball head (10) and the fixture block (2) are respectively provided with a shaft hole (101) and a connecting hole (20);

the torsion spring (4) is sleeved on the connecting position of the clamping block (2) and the clamping groove (30) on the intermediate shaft (3), one end of the torsion spring (4) penetrates through the connecting hole (20) and the shaft hole (101), and the other end of the torsion spring (4) rotates to preset an angle and then penetrates through the accommodating position between the clamping block (2) and the clamping groove (30).

2. A flexible coupling according to claim 1, characterized in that the intermediate shaft (3) is of cylindrical barrel construction.

3. The flexible coupling according to claim 2, wherein the clip (2) is provided with an annular end portion (21) and two clip portions (22), and the clip portions (22) are provided.

4. A flexible coupling according to claim 1, characterized in that the clamping groove (30) is a U-shaped groove.

5. Flexible coupling according to claim 4, characterized in that the two clamping grooves (30) at both ends of the intermediate shaft (3) are offset in a non-parallel manner.

6. A flexible coupling according to claim 5, characterized in that the two clamping grooves (30) are arranged perpendicular to each other.

7. A flexible coupling according to claim 6, characterized in that the torsion spring (4) is a cross-shaped torsion spring.

8. The flexible coupling according to claim 3, wherein the side contact surface of the clamping portion (22) and the clamping groove (30) is an arc concave-convex combination surface.

9. A flexible coupling according to claim 3, characterized in that the end faces of the snap-in parts (22) are arc-shaped concave or convex.

10. The flexible coupling of claim 1, wherein said intermediate shaft is stainless steel.

Technical Field

The invention relates to the technical field of couplings, in particular to a flexible coupling, and particularly relates to a cross-shaped flexible coupling capable of adjusting center.

Background

At present, common flexible couplings used between driving equipment and driven equipment at home comprise diaphragm type couplings, tooth type couplings, plum blossom elastic couplings and the like.

The diaphragm type coupling in the flexible coupling has the advantages of long appearance, heavy weight, difficult installation, high cost and small coaxial deviation absorption. The gear of the gear coupling has high requirements on the machining precision, higher requirements on the technical level of machining personnel and higher cost. The plum blossom elastic coupling is suitable for occasions where other vectors are positioned besides the rotation of the transmission shafts of the driving equipment and the driven equipment. The coupler is complex in structure, large in size, high in processing cost and small in absorption concentricity.

The prior art searches and discovers that the Chinese patent publication No. CN104235210B discloses a crosshead shoe seal coupling, a static seal flange 3 is fixedly arranged in a center hole at the left end of a shell 1 by a connecting bolt 12, a turnover shaft 2 is movably arranged in the static seal flange 3 in a penetrating way, a flange bearing seat 10 is fixedly arranged in a center hole at the right end of the shell 1 by the connecting bolt 12, a swing rod connecting shaft 11 is arranged in the flange bearing seat 10 and a bearing 9 in a penetrating way, the turnover shaft 2 is connected with the swing rod connecting shaft 11 by a crosshead shoe 6, the crosshead shoe 6 is a step-shaped cylinder in shape, a static seal ring 4 is arranged in a circular groove at the right end surface of the static seal flange 3, a movable seal ring 5 is arranged in a circular groove at the left end surface of the crosshead shoe 6, the static seal ring 4 and the movable seal ring 5 are both sleeved on the turnover shaft 2, the crosshead shoe seal coupling, the service life of the equipment is prolonged. The patent suffers from the problems associated with the above.

Disclosure of Invention

In view of the deficiencies in the prior art, it is an object of the present invention to provide a flexible coupling.

The invention provides a flexible coupling which comprises a transmission shaft, a clamping block, an intermediate shaft and a torsion spring, wherein the transmission shaft is connected with the clamping block;

clamping grooves are formed in two ends of the intermediate shaft respectively, two groups of clamping blocks are connected with the clamping grooves respectively, and accommodating positions are formed at intervals between the end parts of the clamping blocks located in the clamping grooves and the bottoms of the clamping grooves;

the end part of the transmission shaft is provided with a ball head, the ball head is placed in the clamping block, and the ball head and the clamping block are respectively provided with a shaft hole and a connecting hole;

the middle shaft is sleeved with the torsion spring, the middle shaft is arranged at the connecting position of the clamping block and the clamping groove, one end of the torsion spring penetrates through the connecting hole and the shaft hole, and the other end of the torsion spring rotates by a preset angle and then penetrates through the accommodating position between the clamping block and the clamping groove.

In some embodiments, the intermediate shaft is a cylindrical barrel structure.

In some embodiments, the fixture block is provided with two annular end portions and two clamping portions.

In some embodiments, the slot is a U-shaped slot.

In some embodiments, the two locking grooves at two ends of the middle shaft are arranged in a non-parallel manner in a staggered manner.

In some embodiments, two of the card slots are disposed perpendicular to each other.

In some embodiments, the torsion spring is a cross-shaped torsion spring

In some embodiments, a side surface of the clamping portion contacting the clamping groove is an arc concave-convex combining surface.

In some embodiments, the end surface of the clamping portion is an arc concave surface or an arc convex surface.

In some embodiments, the intermediate shaft is made of stainless steel.

Compared with the prior art, the invention has the following beneficial effects:

1. the flexible coupling with the adjustable center is simple in structure, can achieve the technical effect of absorbing larger non-concentricity, and solves the problems that the existing flexible coupling is complex in structure, large in size and small in non-concentricity.

2. According to the invention, through the optimized arrangement of the clamping groove structure on the intermediate shaft, the deformation quantity of the intermediate shaft is reduced, and the transmission effect of the flexible coupling is improved.

3. According to the invention, through optimizing the matching structure of the clamping block and the clamping groove, on one hand, the straight torsion arm of the torsion spring can conveniently enter the clamping block, and simultaneously, a good fixing effect is achieved, on the other hand, the matching performance of the contact surface of the clamping block and the clamping groove is improved, and the transmission effect is improved.

Drawings

Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:

FIG. 1 is a schematic view of the overall construction of the flexible coupling of the present invention;

FIG. 2 is a sectional view showing the overall structure of the flexible coupling of the present invention;

fig. 3 is an exploded view of the overall structure of the flexible coupling of the present invention.

Detailed Description

The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that it would be obvious to those skilled in the art that various changes and modifications can be made without departing from the spirit of the invention. All falling within the scope of the present invention.