CN217029577U

CN217029577U - Novel screw rod

Info

Publication number: CN217029577U
Application number: CN202123342381.6U
Authority: CN
Inventors: 魏敬峰; 魏麟
Original assignee: Guangdong Zolong Metal Products Co ltd
Current assignee: Guangdong Zolong Metal Products Co ltd
Priority date: 2021-12-28
Filing date: 2021-12-28
Publication date: 2022-07-22
Anticipated expiration: 2031-12-28

Abstract

The utility model relates to a novel screw, which comprises a base and a screw body, wherein the screw body is welded at the end part of the base, the outer part of the screw body is fixedly provided with screw threads, one end of the screw body, which is far away from the base, is provided with a screw head, and a non-return ring, an elastic element and a sealing sleeve are sleeved between the screw head and the screw body. This novel screw rod, come to improve connection rigidity through setting up the seal cover that is located between screw head and the pole body, cooperation elastic element simultaneously, the stress concentration phenomenon of junction between screw head and the pole body has been improved, form the uninstallation groove through setting up the fillet arc and uninstallation ring, can pass through uninstallation ring butt seal cover, thereby reduce the load concentration of lead screw portion root, reduce the cracked possibility of lead screw portion, thereby the life of screw rod has been improved, increase the external diameter step by step through setting up the thread, thereby can guarantee the thread interlock stress equipartition down, can reduce the life of local loss reduction screw rod.

Description

Novel screw rod

Technical Field

The utility model relates to the technical field of screws, in particular to a novel screw.

Background

The screw rod is a cylinder with a spiral groove cut on the outer surface or a cone with a conical spiral groove cut on the outer surface, the screw rod has different heads, the heads are called outer hexagonal screw rods, and the screw rod has other heads, such as a large flat screw rod, an inner hexagonal screw rod and the like.

Be applied to the screw rod of injection molding machine, as the structure of important similar valve body, can prevent the solution countercurrent, the inventor discovers that above-mentioned technical scheme has following problem at least in the use, the screw rod produces the loss because frictional wear, current screw rod structure makes the screw rod bear great shear force effect easily, the loss of screw rod has been aggravated, and operational environment temperature is usually higher, the screw rod wearing and tearing that have added plastic material further increase, the availability factor of screw rod has been reduced, cause goods quality unstable, the number of times and the expense of mechanical maintenance have been increased, propose a novel screw rod to this, solve the problem that the aforesaid provided.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects of the prior art, the utility model provides a novel screw, which has the advantages of effectively reducing stress concentration, stress amplitude, fatigue strength and the like of the screw, and solves the problems of larger loss and shorter service life of the screw in the prior art.

In order to achieve the purpose, the utility model provides the following technical scheme: a novel screw comprises a base and a screw body, wherein the screw body is welded at the end part of the base, thread teeth are fixedly arranged outside the screw body, a screw head is arranged at one end of the screw body, which is far away from the base, and a non-return ring, an elastic element and a sealing sleeve are sleeved between the screw head and the screw body;

the screw head comprises a bolt part and a screw rod part, the screw rod part is fixedly connected with the bolt part, the screw rod part is in threaded connection with the rod body, a round-angle arc is fixedly installed at the joint of the bolt part and the screw rod part, and meanwhile, an unloading ring is fixedly installed on the bolt part.

Further, the extending distance of the outer edge of the thread tooth relative to the rod body is gradually increased, and the outer diameter of the first circle of thread tooth on one end, facing away from the base, of the rod body is the minimum.

Furthermore, a threaded hole is formed in one end, away from the base, of the rod body, the interior of the rod body is hollow, and meanwhile the length-diameter ratio of the rod body is properly increased compared with that of the existing rod body.

Furthermore, the seal cover includes first clamping ring and second clamping ring, first clamping ring joint in the seal groove has been seted up on the side of second clamping ring towards first clamping ring to the second clamping ring, the inside fixed mounting of seal groove has O type sealing washer.

Furthermore, a clamping piece is fixedly mounted on the first connecting ring, a clamping groove is formed in the second connecting ring, and the clamping piece is clamped in the clamping groove.

Furthermore, the elastic element is a reed, the middle part of the elastic element extends towards the outer side, and the two ends of the elastic element are close to and contract towards the middle part under the extrusion.

Compared with the prior art, the technical scheme of the application has the following beneficial effects:

this novel screw rod, it improves connection rigidity to be located the seal cover between screw head and the pole body through the setting, cooperation elastic element simultaneously, the stress concentration phenomenon of junction between screw head and the pole body has been improved, form the uninstallation groove through setting up fillet arc and uninstallation ring, can close the seal cover by the uninstallation ring butt, thereby it concentrates to reduce the load of silk pole portion root, reduce the cracked possibility of silk pole portion, thereby the life of screw rod has been improved, increase the external diameter step by step through setting up the thread, thereby can guarantee the thread interlock stress equipartition down, can reduce the life that local loss reduces the screw rod.

Drawings

FIG. 1 is an exploded view of the present invention;

FIG. 2 is a schematic view of the structure of the sealing sleeve of the present invention;

fig. 3 is a schematic structural view of the screw head of the present invention.

In the figure: the screw comprises a base 1, a shaft body 2, a thread tooth 3, a non-return ring 4, an elastic element 5, a sealing sleeve 6, a first connecting ring 61, a second connecting ring 62, a clamping piece 63, a clamping groove 64, a sealing groove 65, a sealing ring 66O, a screw head 7, a bolt part 71, a screw rod part 72, a circular arc 73 and an unloading ring 74.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.

Referring to fig. 1-3, the novel screw in the present embodiment includes a base 1 and a shaft 2, the shaft 2 is welded on an end of the base 1, the base 1 is used for connecting the shaft 2 and facilitating connection between the screw and a device to provide support for mounting the screw, and a thread 3 is fixedly mounted on an exterior of the shaft 2.

It should be noted that, because the part of the thread 3 near the connection end bears the load in a concentrated manner, the overall load distribution on the thread is uneven, the extension distance of the outer edge of the thread 3 relative to the shank 2 increases gradually, the outer diameter of the first turn of the thread 3 on the end of the shank 2 facing away from the base 1 is the smallest, which helps to reduce the pitch variation difference, so that the degree of uneven load distribution among the turns of the thread after screwing is improved.

In this embodiment, a screw head 7 is disposed at one end of the screw body 2 away from the base 1, a check ring 4, an elastic element 5 and a sealing sleeve 6 are sleeved between the screw head 7 and the screw body, the screw head 7 includes a screw part 71 and a screw part 72, the screw part 72 is fixedly connected to the screw part 71 and is used for connecting the screw head 7 and the screw body 2, the screw part 72 is in threaded connection with the screw body 2, a threaded hole is formed in one end of the screw body 2 away from the base 1, the inside of the screw body 2 is hollow, meanwhile, the length-diameter ratio of the screw body 2 is properly increased compared with that of the existing screw body 2 to reduce the overall rigidity of the screw, and the elastic element 5 is matched to have a strong energy absorption effect, so that an effect of a flexible bolt is achieved, the screw is suitable for bearing impact and vibration, and the service life of the screw is prolonged.

It should be noted that, a round-angle arc 73 is fixedly installed at the joint of the bolt part 71 and the screw rod part 72, and an unloading ring 74 is also fixedly installed on the bolt part 71, so that an unloading groove can be formed between the unloading ring 74 and the round-angle arc 73, and the stress concentration at the root of the screw rod part 72 can be reduced, thereby reducing the overall fatigue strength of the screw rod and reducing the occurrence of breakage.

In order to increase the rigidity of the coupled system between the screw head 7 and the screw body, the sealing sleeve 6 in this embodiment includes a first connecting ring 61 and a second connecting ring 62, a clamping piece 63 is fixedly mounted on the first connecting ring 61, a clamping groove 64 is formed in the second connecting ring 62, the clamping piece 63 is clamped in the clamping groove 64, so that the connection tightness between the first connecting ring 62 and the second connecting ring 62 is ensured, compared with a gasket with small rigidity used in the prior art, the gasket is used for better connection rigidity, meanwhile, a sealing groove 65 is formed in one side surface, facing the first connecting ring 61, of the second connecting ring 62, an O-shaped sealing ring 66 is fixedly mounted inside the sealing groove 65, the screw is externally sealed through the O-shaped sealing ring, good connection rigidity is ensured, and meanwhile, the sealing connection between the sealing sleeve 6 and the screw head 7 is good.

The working principle of the embodiment is as follows:

through establishing seal cover 6, elastic element 5 and non-return ring 4 are in succession established in the outside of silk pole portion 72, dock the screw hole of seting up on silk pole portion 72 and the pole body 2 mutually, make screw head 7 and pole body 2 accomplish the assembly, under the screw rod is rotatory, the outside screw thread 3 external diameter of screw rod outside increases step by step, make the screw thread atress even, the junction of screw bolt portion 71 and silk pole portion 72 simultaneously, trade 74 and round angle arc 73 and eliminate stress concentration phenomenon through the uninstallation, make the atress even, the life of screw rod is prolonged on the whole, the flexible impact resistance effect of while strengthening the screw rod through natural element 5, reduce the loss condition of screw rod.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a novel screw rod, includes base (1) and pole body (2), its characterized in that: the screw rod body (2) is welded at the end part of the base (1), thread teeth (3) are fixedly arranged outside the screw rod body (2), a screw rod head (7) is arranged at one end, away from the base (1), of the screw rod body (2), and a non-return ring (4), an elastic element (5) and a sealing sleeve (6) are sleeved between the screw rod head (7) and the screw rod body;

the screw head (7) comprises a bolt part (71) and a screw rod part (72), the screw rod part (72) is fixedly connected to the bolt part (71), the screw rod part (72) is in threaded connection with the screw rod body (2), a round-angle arc (73) is fixedly installed at the joint of the bolt part (71) and the screw rod part (72), and meanwhile, an unloading ring (74) is fixedly installed on the bolt part (71).

2. The new screw of claim 1, wherein: the outer edge of the thread (3) gradually increases relative to the extension distance of the rod body (2), and the outer diameter of the first circle of thread (3) on one end, facing away from the base (1), of the rod body (2) is the smallest.

3. The new screw of claim 1, wherein: one end of the rod body (2) far away from the base (1) is provided with a threaded hole, the interior of the rod body (2) is hollow, and meanwhile, the length-diameter ratio of the rod body (2) is properly increased compared with that of the existing rod body (2).

4. A new screw according to claim 1, characterised in that: seal cover (6) include first clamping ring (61) and second clamping ring (62), first clamping ring (61) joint in second clamping ring (62), seal groove (65) have been seted up on second clamping ring (62) the side of first clamping ring (61) orientation, the inside fixed mounting of seal groove (65) has O type sealing washer (66).

5. The new screw of claim 4, wherein: the clamping piece (63) is fixedly mounted on the first connecting ring (61), the clamping groove (64) is formed in the second connecting ring (62), and the clamping piece (63) is clamped in the clamping groove (64).

6. A new screw according to claim 1, characterised in that: the elastic element (5) is a reed, the middle part of the elastic element extends towards the outside, and the two ends of the elastic element are close to and contract towards the middle part under extrusion.