CN210763701U - Mechanical expansion shaft - Google Patents

Abstract

The utility model discloses a for solving above-mentioned technical problem, the technical scheme of the utility model is: a mechanical expansion shaft comprises a shaft head and a plurality of expansion keys, wherein a plurality of key grooves are uniformly distributed on the periphery of the shaft head, and the inside of each expansion key is arranged in one key groove and extends out of the surface of the shaft head; the bottom of the key groove is radially provided with at least two mounting holes, the bottom of the expansion key is fixedly provided with at least two pin rods, each pin rod is connected in each mounting hole in a socket joint mode through a linear shaft, and rectangular springs are further arranged on the periphery of each pin rod and between the expansion key and the linear bearing. The utility model is used for material of rolling up receives material and blowing.

Description

Mechanical expansion shaft

Technical Field

The utility model relates to a receive and release material pivot technical field, concretely relates to mechanical type axle that expands.

Background

The coil stock is a common storage form of materials in industrial production, and the coil stock needs to be coiled into a coil shape for storage through a coiling mode, and is coiled into a strip material for use when in use. The conventional common winding shaft comprises an inflatable winding shaft and a spring winding shaft, the inflatable winding shaft supports an expansion shaft through inflation of an inflatable bag, an expansion key of the spring winding shaft expands the shaft through the elasticity of a spring, and the expansion shaft has no special guide structure no matter the inflatable winding shaft or the spring winding shaft, so that the instability phenomenon exists; and the supporting force size everywhere on the key that expands is inconsistent easily, leads to the key radial height that expands to be inconsistent for material book is local not hard up on the axle that expands when unreeling or rolling, leads to the material area elasticity everywhere inconsistent, influences the normal production and the use of area material.

SUMMERY OF THE UTILITY MODEL

The utility model provides a technical problem to be not enough in the background art, provide the mechanical type axle that expands that can solve.

In order to solve the technical problem, the technical scheme of the utility model is that: a mechanical expansion shaft comprises a shaft head and a plurality of expansion keys, wherein a plurality of key grooves are uniformly distributed on the periphery of the shaft head, and the inside of each expansion key is arranged in one key groove and extends out of the surface of the shaft head; the bottom of the key groove is radially provided with at least two mounting holes, the bottom of the expansion key is fixedly provided with at least two pin rods, each pin rod is connected in each mounting hole in a socket joint mode through a linear shaft, and rectangular springs are further arranged on the periphery of each pin rod and between the expansion key and the linear bearing.

Further, the pin rod is a screw pin and comprises a threaded portion and a pin portion, the threaded portion is in threaded connection with the expansion key, and the pin portion is connected with the mounting hole in an inserting mode.

Further, the key groove is of a slotted structure which is small in the radial outer side and large in the inner side, and the expansion key is limited on the shaft head through the key groove.

Furthermore, a sealing plate is arranged on the front end face of the shaft head.

Furthermore, a baffle is arranged on the rear end face of the shaft head, and a hollow structure is arranged on the baffle.

Furthermore, the periphery of the expansion key is provided with anti-skid lines.

Furthermore, the antiskid lines are lines and are parallel to the axial direction of the shaft head.

The utility model discloses the beneficial effect who realizes mainly has following several: a linear bearing is arranged in the mounting hole of the shaft head, the pin rod is inserted into the linear bearing, and the pin rod of the expansion key is guided by the linear bearing, so that the pin rod can slide in the mounting hole more easily, and the linearity of the movement of the expansion key is better; rectangular springs are arranged at the periphery of the pin rod and between the expansion key and the linear bearing, so that the straightness of the expansion key during expansion and loosening is further ensured; and set up more than two sets of linear bearing and rectangle spring between every key and keyway that expand for the key that expands is bloated tight and is loosened the key that expands everywhere atress is more even in length direction, and the difficult appearance expands that each high nonconformity leads to when unreeling or rolling material roll up the situation that the normal operation of influence area material is not hard up on the axle that expands on the key, thereby can play the effect of protection coil stock.

Drawings

Fig. 1 is a schematic perspective view of a mechanical expansion shaft according to an embodiment of the present invention;

fig. 2 is a left side view schematic structural diagram of a mechanical expansion shaft in an embodiment of the present invention;

FIG. 3 is a schematic cross-sectional view taken along line A-A of FIG. 2;

fig. 4 is a left side view structural schematic diagram of an expansion key of a mechanical expansion shaft in an embodiment of the present invention;

fig. 5 is a schematic perspective view of a pin of a mechanical expansion shaft according to an embodiment of the present invention;

fig. 6 is an exploded view (left side view, excluding the closure and the baffle) of a mechanical expansion shaft according to an embodiment of the present invention.

The drawings are for illustrative purposes only and are not to be construed as limiting the patent; for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted; the same or similar reference numerals correspond to the same or similar parts; the terms describing positional relationships in the drawings are for illustrative purposes only and are not to be construed as limiting the patent.

Detailed Description

To facilitate understanding for those skilled in the art, the present invention will be described in further detail with reference to the accompanying drawings and examples.

Example one

Referring to fig. 1 to 6, a mechanical expansion shaft is used for an unwinding or winding reel. The mechanical expansion shaft comprises a shaft head 1 and a plurality of expansion keys 2, wherein the shaft head 1 is of a cylindrical structure and is used as a main body structure of the expansion shaft, and the expansion keys 2 are movably arranged on the shaft head 1 to realize the function of expanding a fixed material coil. A plurality of keyways 11 of 1 peripheral equipartition of spindle nose set up in the radial outside of cylindric spindle nose, set up keyway 11 three or more than three better for can install more bloated key 2, thereby better fixed material book, the structure of setting up three keyway has been shown in this embodiment. Correspondingly, each expansion key 2 is arranged in one key groove 11, and each expansion key 2 extends out of the surface of the shaft head 1 to abut against the inner wall of a material roll to clamp and fix the material roll.

Referring to fig. 3, at least two mounting holes 12 are radially formed in the bottom of the key slot 11, two or more mounting holes 12 may be formed in the bottom of each key slot 11, the more the mounting holes 12 are formed, the better the linearity of the expansion key 2 during telescopic movement is, and the two mounting holes 12 are provided in the embodiment for illustration. Correspondingly, the bottom of the expansion key 2 is at least fixedly provided with two pin rods 21, one pin rod corresponds to each mounting hole 12, and the expansion key 2 slides in the mounting holes 12 along with the pin rods 21 so as to guide the movement of the expansion key 2. Each pin rod 21 is inserted into each mounting hole 12 through the linear bearing 3, namely the linear bearing 3 is arranged in the mounting hole 12, and the pin rod 21 is inserted into the linear bearing 3, so that the pin rod 21 can slide in the mounting hole 12 more easily and has better linearity; the linear bearing 3 may be a conventional commercially available linear bearing. A rectangular spring 4 is further arranged on the periphery of the pin rod 21 and between the expansion key 2 and the linear bearing 3, the expansion key 2 is ejected out of the shaft head 1 through the elasticity of the spring, and a material roll is clamped tightly; and the rectangular spring is adopted, so that the straightness of the expansion key 2 during expansion and loosening is further ensured. And set up more than two sets of linear bearing and rectangle spring between every key and keyway that expand for expand key 2 expand tightly and loosen the key that expands atress more even in length direction, the difficult appearance expands on the key everywhere highly nonconformity leads to when unreeling or rolling material roll up the epaxial local not hard up situation that influences the normal operation of area material of axle that expands, thereby can protect the coil stock.

Referring to fig. 5, as a preferred embodiment, the pin rod 21 is a screw pin, that is, a structure having a screw structure and a pin structure, the pin rod 21 includes a screw portion 211 and a pin portion 212, the screw portion 211 is screwed with the expansion key 2, the expansion key 2 is provided with a screw hole matching with the screw portion 211, and the screw portion 211 is screwed in the screw hole to fix the expansion key 2 and the pin rod 21. The screw thread portion 211 is last to set up the nut best, and bloated key 2 sets up the toper screw that matches with the nut, and the nut holds in the toper screw when screw thread portion 211 and screw spiro union, and the cooperation through nut and toper screw carries on spacingly to the spiro union degree of depth of screw thread portion to should not excessively twist when pin rod 21 and bloated key 2 spiro union and lead to both separation. The pin portion 212 is a cylindrical polished rod structure, and is inserted into the linear bearing 3 in the mounting hole 12. The length of the pin part 212 is long, so that the rectangular spring can be sleeved on one side, close to the threaded part 211, of the pin part 212, after the expansion shaft is assembled, one end of the rectangular spring is abutted to the expansion key, and the other end of the rectangular spring is abutted to the upper end of the linear bearing or the mounting hole.

Referring to fig. 6, the key groove 11 is a slotted structure with a small radial outer side and a large inner side, and the expansion key 2 is also a structure with a small radial outer side and a large inner side, so that when the expansion key is installed in the key groove, the expansion key 2 can be limited on the shaft head 1 through the key groove 11; the key can be inserted into the key slot from one end of the key slot when the key is installed. The shapes of the key groove 11 and the expansion key 2 can be set as shown in fig. 6, and other structures with limiting function of the key groove to the expansion key can also be adopted.

Referring to fig. 1, a sealing plate 5 is arranged on the front end face of the spindle head 1, so that a side protection effect is exerted on a key groove, and dust, impurities and the like are prevented from entering the key groove to influence the action of key expansion; the closing plate 5 can be set to be of a wafer structure consistent with the end face of the shaft head and is in threaded connection with one end of the shaft head through a screw. The rear end face of the shaft head 1 is provided with a baffle 6, the baffle 6 plays a role in protecting a key groove and limiting a material roll, and the material roll is prevented from sliding out of the shaft head; the baffle 6 is preferably provided with a hollow structure 61, so that the weight of the expansion shaft is reduced. The rear end of the shaft head 1 is also connected with a transmission shaft 7, and the transmission shaft is connected with rotating parts such as a motor through a synchronous belt, so that the expansion shaft is driven to rotate, and the rotating function of the expansion shaft is realized. The periphery of the expansion key 2 is provided with anti-skid grains 22, so that the material roll is more stably fixed on the expansion shaft; the lines of the antiskid lines 22 can be parallel to the axial direction of the shaft head 1.

The manipulator expansion shaft assembly process of the embodiment is as follows: firstly, the linear bearing 3 is installed in the installation hole 12, and the rectangular spring 4 is installed in the installation hole and above the linear bearing 3; then inserting the expansion key 2 into the key slot 11 from one end of the key slot 11; then the pin rod 21 is inserted into the linear bearing 3 of the mounting hole 12 from the expansion key 2 and is rotatably screwed on the expansion key 2; finally, the closing plate 5 and the baffle 6 are installed. When in use, the expansion shaft is arranged on the transmission shaft 7 and is driven to rotate through the transmission shaft 7; when the material roll is installed, the material roll is inserted into the shaft head, and the material roll is tightly clamped through the expansion key; when the material roll is taken out from the shaft head, the expansion key is manually pressed down, and the material roll is taken out from the shaft head.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not limitations to the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims (7)

1. A mechanical type axle that expands which characterized in that: the shaft head comprises a shaft head (1) and a plurality of expansion keys (2), wherein a plurality of key grooves (11) are uniformly distributed on the periphery of the shaft head (1), and the expansion keys (2) are respectively arranged in one key groove (11) and extend out of the surface of the shaft head (1); the bottom of the key groove (11) is radially provided with at least two mounting holes (12), the bottom of the expansion key (2) is fixedly provided with at least two pin rods (21), each pin rod (21) is inserted into each mounting hole (12) through a linear bearing (3), and rectangular springs (4) are further arranged on the periphery of each pin rod (21) and between the expansion key (2) and the linear bearing (3).

2. The mechanical expander shaft of claim 1, wherein: the pin rod (21) is a screw pin, the pin rod (21) comprises a thread portion (211) and a pin portion (212), the thread portion (211) is in threaded connection with the expansion key (2), and the pin portion (212) is inserted into the mounting hole (12).

3. The mechanical expander shaft of claim 2, wherein: the key groove (11) is of a slotted structure which is small in the radial outer side and large in the inner side, and the expansion key (2) is limited on the shaft head (1) through the key groove (11).

4. The mechanical expander shaft of claim 3, wherein: a sealing plate (5) is arranged on the front end face of the shaft head (1).

5. The mechanical expander shaft of claim 4, wherein: a baffle (6) is arranged on the rear end face of the shaft head (1), and a hollow structure (61) is arranged on the baffle (6).

6. A mechanical expansion shaft according to any of claims 1 to 5, wherein: the periphery of the expansion key (2) is provided with anti-skid lines (22).

7. The mechanical expander shaft of claim 6, wherein: the antiskid lines (22) are lines which are parallel to the axial direction of the shaft head (1).

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