Composite protection device for internal thread component

Abstract

The utility model relates to the technical field of surface treatment, in particular to a composite protection device for an internal thread component, which comprises an inner core bulging part and an adjusting part arranged on the outer side of the inner core bulging part, and a protection part is sleeved on the outer wall of the adjusting part. The inner core bulging part, the adjusting part and the protecting part are all made of elastic materials, and the inner core bulging part, the adjusting part and the protecting part are matched to abut against the thread position of the internal thread component, so that a product subjected to sand blasting / shot blasting treatment is protected. The internal thread part is screwed into the protection device to shield and protect the internal thread, so that sand grains can be effectively prevented from being embedded into the internal thread in a sand blasting / shot blasting project, and a workpiece is not easy to damage; the whole device can be applied to any product with internal threads, and is high in universality.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of composite protective devices for internally threaded parts, belong to surface treatment technical field. BACKGROUND

[0002] In industrial production, sand blasting / shot blasting is used as a common pretreatment process, which removes rust and dust or increases the roughness of the metal surface. In actual production, some parts with threaded holes also need to be sand blasted. However, in many cases, sand blasting can easily damage the threads, and the tightly fitted threads are affected during use.

[0003] Therefore, it is necessary to protect the threaded hole during sand blasting. The commonly used method is to use a threaded protection plug. There are several types of threaded protection plugs on the market: the first type is a rubber plug, including solid rubber plugs and hollow rubber plugs. The solid rubber plug is prone to falling off, and the hollow rubber plug is prone to wrinkling and deformation in addition to falling off, resulting in poor protection. Another type is a matching threaded metal plug (plastic plug), which is time-consuming and labor-intensive to install and has high costs. When small sand particles get stuck in the gap, it is difficult to remove them and also causes damage to the threads. Moreover, the threads of the plastic plug are also prone to falling off under the action of sand blasting force.

[0004] CN202121896020.3 discloses a sand blasting part precision hole protection plug, which belongs to the technical field of part sand blasting and includes a plug body and a plug cap. The plug body has a through hole that extends axially, and the plug body can be inserted into the precision hole. The plug body has elasticity. The plug cap can be inserted into the through hole, and the size of the plug cap inserted into the through hole is larger than the size of the through hole. The proposed sand blasting part precision hole protection plug is safe, has good protection effect, and is easy to disassemble and assemble.

[0005] After searching, CN202421130678.7 discloses a threaded protection tool for sand blasting process, which includes a rubber protection sleeve with two limiting grooves inside. The rubber protection sleeve is inserted into the threaded hole of the plate-shaped part, and a fixed rod assembly is inserted into the rubber protection sleeve to compress it. This solves the problem of rubber plugs falling off and getting stuck in the threaded hole during sand blasting, making it difficult to remove the rubber plugs. The structure is complex and the production cost is high.

[0006] Therefore, there is an urgent need to design a protective device that improves the quality of sand blasting / shot blasting of parts with internal threads. It has practical significance and economic value in actual production. UTILITY MODEL CONTENTS

[0007] The utility model discloses in order to solve the above-mentioned prior art's insufficient, provide a kind of composite protective device for internal thread component, protective device is elastically deformable structure, can be inserted into internal thread hole, elastically deformable structure is opened, with internal thread hole is attached, and it is resisted to thread part;With internal thread component, overall sandblasting / shot blasting treatment is carried out to the elastically deformable structure of assembly.

[0008] The utility model discloses to solve above-mentioned problem and adopt technical means as follows:

[0009] Disclose a kind of composite protective device for internal thread component, including inner core bulging portion, adjusting portion being arranged at the outer side of inner core bulging portion, the outer wall of adjusting portion is equipped with protection part;The inner core bulging portion, adjusting portion and protection part are all elastic material, the inner core bulging portion, adjusting portion and protection part cooperate to resist the thread place of internal thread component, protect the product of sandblasting / shot blasting treatment.

[0010] Further, the inner core bulging portion includes a locking rod provided with an external thread and a stop end cover provided at an end of the locking rod, and the length of the locking rod is greater than or equal to the length of the internal thread one of the internal thread component.

[0011] Further, the width of the stop end cover is greater than the diameter of the internal thread one.

[0012] Further, the adjusting portion is in a petal-shaped structure, one side of the petal-shaped structure close to the stop end cover is in a closed structure, and the other side is in a split structure.

[0013] Further, the petal-shaped structure includes oppositely arranged outer edge arcs and inner edge arcs, the central axes of the outer edge arcs and the inner edge arcs coincide with the central axis of the internal thread component, the outer edge arcs are surrounded into a cylindrical shape or a first conical shape, and the inner edge arcs are surrounded into a second conical shape. The inner and outer tapers of the first conical shape and the second conical shape are not necessarily the same. The purpose is that when the internal thread component is screwed in, the thickness of the outer wall of the adjusting portion is basically consistent after bulging.

[0014] Further, the end of the petal-shaped structure is in a ring structure, the ring structure includes a ring-shaped inner hole, and the diameter of the ring-shaped inner hole is greater than or equal to the outer diameter of the locking rod.

[0015] Further, the protection part is a rubber ring, and the inner diameter of the rubber ring is greater than or equal to the outer diameter of the adjusting portion.

[0016] Further, an internal thread two engaging with the external thread is arranged on the inner side of the adjusting portion; the inner edge arcs are provided with the internal thread two, and the internal thread two is matched with the external thread of the locking rod to be screwed.

[0017] Further, the length of the locking rod, the adjusting portion and the protection part is greater than 1 / 2 of the thread length of the internal thread component and less than or equal to the length of the thread to be protected of the internal thread component.

[0018] Furthermore, the stop end cap is provided with a raised knob for screwing in and out of the inner core expansion portion.

[0019] Compared with the prior art, the beneficial effects of this utility model are:

[0020] This utility model discloses a composite protective device for internal thread components. By screwing the internal thread component into the protective device, the internal thread is shielded and protected, which can effectively ensure that sand particles will not be embedded in the internal thread during sandblasting / shot peening and will not easily damage the workpiece. The whole method can be applied to any product with internal threads and has strong versatility.

[0021] The composite protective device for internal thread components of this utility model uses an inner core expansion part to compress the outer adjustment part and the protective part sleeved on the outside of the adjustment part, so that they can effectively fit into the internal thread through deformation, making the installation firm, safe and tight.

[0022] The composite protective device for internal thread components of this utility model has an inner core expansion part, an adjustment part, and a protective part all made of elastic material. The whole is elastic, so sand particles will not damage the threads and can effectively protect the threads. The elasticity of the material makes it relatively easy to clean the stuck sand particles.

[0023] The composite protective device for internal threaded components of this utility model is easy to operate and easy to promote. Attached Figure Description

[0024] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings...

[0025] Figure 1 This is a schematic diagram of the overall structure of the composite protective device for internal thread components of this utility model.

[0026] Figure 2 This is a schematic diagram of the assembly structure of the composite protective device for internal thread components of this utility model.

[0027] Among them, 1. Inner core bulging part, 2. Adjustment part, 3. Protection part, 11. Locking rod, 12. Stop end cover, 13. Protruding knob, 21. Petal structure, 22. Ring structure, 23. Ring inner hole, 211. Outer edge arc, 212. Inner edge arc, 100. Internal threaded hole. Detailed Implementation

[0028] The present invention will be further described below with reference to the embodiments, but the scope of protection of the present invention is not limited thereto.

[0029] like Figure 1 - Figure 2As shown, the internal threaded component of this embodiment uses a composite protective device. The internal threaded component is screwed into the protective device, which is an elastically deformable structure that can be inserted into the internal threaded hole 100. The elastically deformable structure is expanded to fit against the internal threaded hole 100 and abut against the threaded part. The internal threaded component with the elastically deformable structure is then subjected to sandblasting / shot peening treatment.

[0030] The protective device in this embodiment includes an inner core bulge 1, an adjustment part 2 disposed outside the inner core bulge 1, and a protective part 3 sleeved on the outer wall of the adjustment part 2; the inner core bulge 1, the adjustment part 2, and the protective part 3 are all made of elastic materials. The elastic material can be rubber, polyurethane foam, silicone, etc., to adapt to different internal thread applications. The elastic material is deformable, and can be compressed to make the entire protective device fit tightly against the thread of the internal thread component, effectively protecting the thread.

[0031] Specifically, the inner core expansion portion 1 includes a locking rod 11 and a stop end cap 12 disposed at the end of the locking rod 11. The locking rod 11 is a screw with external threads (not shown in the figure), and its length is greater than or equal to the length of the internal thread of the internal thread component. The width of the stop end cap 12 is greater than the diameter of the internal thread. A protruding knob 13 is provided on the stop end cap 12 for screwing in and out of the inner core expansion portion 1. In this embodiment, the locking rod 11 is preferably made of plastic, which has a certain degree of elasticity, low cost, and is easy to mold. The locking rod 11 is preferably an inner plastic bolt, which, after expansion, produces a relatively uniform interference fit with the adjusting part (expansion plug) and the protective part (elastic body). The precision of the inner plastic bolt does not need to be very high, and the thread needs to be relatively coarse for easy disassembly and installation.

[0032] The adjusting part 2 has a petal-shaped structure 21. The side of the petal-shaped structure closest to the stop end cap 12 is closed, while the other side is a split structure. The petal-shaped structure 21 includes an outer edge arc 211 and an inner edge arc 212 arranged opposite each other. The central axes of the outer edge arc 211 and the inner edge arc 212 coincide with the central axis of the internal thread component. The outer edge arc 211 forms a cylindrical or first cone shape; in this embodiment, it is cylindrical. The inner edge arc 212 forms a second cone shape. The inner and outer tapers of the first and second cones are not necessarily the same. The purpose is to ensure that when the inner side is screwed in with expansion, the outer wall thickness of the adjusting part is basically consistent after expansion.

[0033] The inner edge arc 212 is provided with an internal thread 2, which engages with the external thread of the locking rod 11 to tighten. Furthermore, the end of the flap structure 21 is a ring structure 22, which includes an annular inner hole 23, the diameter of which is greater than or equal to the outer diameter of the locking rod 11.

[0034] In this embodiment, the inner and outer edges of the petal structure have different wall thicknesses. The inner edge diameter is larger on the side closer to the stop end cap 12, which is compatible with the cylindrical locking rod 11. The inner edge diameter becomes smaller on the side farther away from the stop end cap 12, meaning the petal structure becomes thicker and thicker. The locking rod 11 can be easily screwed into the annular structure 22 of the petal structure 21. As the inner edge diameter deforms, the locking rod 11 squeezes and deforms the petal structure, which can fill the gap of the petal structure with the deformed petal structure.

[0035] In this embodiment, the petal structure 21 is a fan-shaped structure of the same size cut along the circumference of the cylindrical body. This structure allows the bottom of the entire adjusting part 2 to gradually expand when the locking rod 11 is screwed in, which drives the protective part 3, which is fitted on the outer wall of the adjusting part 2, to be squeezed in the direction of the internal thread, so that the entire composite protective device is tightly packed in the internal threaded part to be protected.

[0036] Furthermore, the protective part 3 is a rubber ring, and the inner diameter of the rubber ring is greater than or equal to the outer diameter of the adjusting part 2. The rubber material is deformable, ensuring a tight installation; at the same time, the rubber is relatively soft, so there is no hard contact during installation, which can provide gentle protection during installation and not damage the threads of the internal threaded parts.

[0037] To ensure reliable installation, the lengths of the locking rod 11, adjusting part 2, and protective part 3 are set to be greater than 1 / 2 of the thread length of the internal thread component and less than or equal to the thread length of the internal thread component to be protected.

[0038] The composite protective device for internal thread components of this utility model has an inner core expansion part, an adjustment part, and a protective part all made of elastic material. The whole is elastic, so sand particles will not damage the threads and can effectively protect the threads. The elasticity of the material makes it relatively easy to clean the stuck sand particles.

[0039] Those skilled in the art can make various changes or modifications without departing from the spirit and scope of this utility model. Therefore, all equivalent technical solutions should also fall within the protection scope of this utility model, which should be defined by the claims.

Claims

1. A composite protective device for internally threaded components, characterized in that, It includes an inner core bulging part (1), an adjustment part (2) disposed outside the inner core bulging part (1), and a protective part (3) sleeved on the outer wall of the adjustment part (2); the inner core bulging part (1), the adjustment part (2) and the protective part (3) are all made of elastic material, and the inner core bulging part (1), the adjustment part (2) and the protective part (3) cooperate to abut against the thread of the internal thread component to protect the product treated by sandblasting / shot peening.

2. The composite protective device for internal threaded components according to claim 1, characterized in that, The inner core expansion part (1) includes a locking rod (11) with external threads and a stop end cap (12) provided at the end of the locking rod (11). The length of the locking rod (11) is greater than or equal to the length of the internal thread of the internal thread component.

3. The composite protective device for internal threaded components according to claim 2, characterized in that, The width of the stop end cap (12) is greater than the diameter of the internal thread.

4. The composite protective device for internal threaded components according to claim 3, characterized in that, The adjustment part (2) is a petal structure (21). The petal structure (21) is closed on the side near the stop end cover (12) and split on the other side.

5. The composite protective device for internal threaded components according to claim 4, characterized in that, The petal structure (21) includes an outer arc (211) and an inner arc (212), the central axes of the outer arc (211) and the inner arc (212) coincide with the central axis of the internal thread component; the outer arc (211) forms a cylindrical or first cone shape, and the inner arc (212) forms a second cone shape.

6. The composite protective device for internal threaded components according to claim 5, characterized in that, The end of the petal structure (21) is a ring structure (22), which includes an annular inner hole (23) with a diameter greater than or equal to the outer diameter of the locking rod (11).

7. The composite protective device for internal threaded components according to claim 6, characterized in that, The protective part (3) is a rubber ring, and the inner diameter of the rubber ring is greater than or equal to the outer diameter of the adjusting part (2).

8. The composite protective device for internal threaded components according to claim 7, characterized in that... The inner side of the adjustment part (2) is configured with an internal thread that engages with the external thread.

9. The composite protective device for internal threaded components according to any one of claims 2-8, characterized in that, The lengths of the adjusting part (2) and the protective part (3) of the locking rod (11) are greater than 1 / 2 of the thread length of the internal thread component and less than or equal to the thread length of the internal thread component to be protected.

10. The composite protective device for internal threaded components according to claim 9, characterized in that, The stop end cap (12) is provided with a protruding knob (13) for screwing in and out of the inner core expansion part (1).

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