An expansion screw locking device

Abstract

This utility model discloses an expansion screw locking device, applied in the field of locking device technology. It includes an expansion screw tube, inside which is an expansion screw core. A locking sleeve is threaded onto the surface of the expansion screw core. A fixing sleeve is slidably fitted onto the surface of the locking sleeve. A top block is installed at the top of the locking sleeve. Fixing blocks are symmetrically welded onto the surface of the fixing sleeve. A holding sleeve is slidably fitted onto the surface of the fixing blocks. A buffer spring is bolted between the other end of the fixing block and the holding sleeve via a spring fixing plate. A damper is installed between the other end of the fixing block and the holding sleeve. This device can efficiently lock the expansion screw, is easy and efficient to install, ensures the plug expands to its limit, and provides good shock resistance by converting some kinetic energy into elastic potential energy and releasing it slowly, reducing the force directly transmitted to the hand. It is highly practical.

Description

Technical Field

[0001] This utility model belongs to the technical field of locking devices, and specifically relates to an expansion screw locking device. Background Technology

[0002] In the processing of steel blocks for most automotive hot pressing molds, expansion plugs for water channels in the steel blocks need to be designed for water sealing. However, current manual installation easily leads to uneven expansion of the plugs, poor sealing effect, insufficient reliability, and is extremely time-consuming. There is a lack of a simple and efficient fixture for installing expansion bolts on the market. Utility Model Content

[0003] The purpose of this utility model is to provide an expansion screw locking device, which has the advantage of being able to lock expansion screws efficiently.

[0004] The above-mentioned technical objective of this utility model is achieved through the following technical solution: an expansion screw locking device, comprising an expansion screw tube, an expansion screw core disposed inside the expansion screw tube, a locking sleeve threadedly connected to the surface of the expansion screw core, a fixing sleeve slidably sleeved on the surface of the locking sleeve, a top block installed at the top of the locking sleeve, fixing blocks symmetrically welded to the surface of the fixing sleeve, a holding sleeve slidably sleeved on the surface of the fixing blocks, a buffer spring bolted between the other end of the fixing block and the holding sleeve via a spring fixing plate, and a damper installed between the other end of the fixing block and the holding sleeve.

[0005] The above technical solution can efficiently tighten the expansion screws, making installation efficient and convenient, ensuring that the plug expands to its limit, while also achieving good shock resistance and protection. It converts some kinetic energy into elastic potential energy and then releases it slowly, reducing the force directly transmitted to the hand, and is highly practical.

[0006] The present invention is further configured such that an internal hexagonal groove is provided on the top of the top block.

[0007] The above technical solution allows for easy rotation of the top block and locking sleeve by personnel using tools, facilitating the screwing of the locking sleeve into the surface of the expansion screw core or its removal.

[0008] The present invention is further configured such that the locking nut, the fixing cylinder and the top block are all made of stainless steel.

[0009] The above technical solution features high strength, low density, and excellent corrosion resistance in the locking nut, fixing sleeve, and top block.

[0010] The present invention is further provided that the surface of the expansion screw tube is integrally formed with a reinforcing strip.

[0011] The above technical solution enhances the stability of the expansion bolt locking into the steel block water channel plug by setting up a reinforcing strip.

[0012] The present invention is further provided that a nitrile rubber sleeve is fixedly fitted onto the surface of the gripping cylinder.

[0013] The above technical solution, through the installation of nitrile rubber sleeves, can play a role in shock absorption and slip prevention.

[0014] The present invention is further configured such that the buffer spring is made of carbon spring steel.

[0015] Using the above technical solution, the buffer spring has the characteristics of excellent mechanical properties, good anti-elasticity, low temperature resistance and corrosion resistance.

[0016] In summary, this utility model has the following beneficial effects:

[0017] 1. First, place the fixing sleeve onto the locking nut and pull it to the highest position. After the fixing sleeve is in place, screw the bottom end of the locking nut downwards into the inner core of the expansion screw. After the locking nut and the inner core of the expansion screw are connected, lock the expansion tube of the expansion screw into the thread of the steel block water pipe plug. Finally, hold the nitrile rubber sleeve by hand and pull it forcefully to pull the inner core of the expansion screw to a certain position until the expansion tube of the expansion screw expands to the optimal state. This can efficiently lock the expansion screw, making installation efficient and convenient, and ensuring that the plug expands to the limit.

[0018] 2. By forcefully pulling on the nitrile rubber sleeve, the top of the fixed cylinder will violently impact the top block. When the top of the fixed cylinder impacts the top block, the impact force will not only be transmitted downward to the fixed block, but it will also cause the person's hand and the nitrile rubber sleeve being held to move inward. When the nitrile rubber sleeve moves inward, it will compress the buffer spring and damper. When the buffer spring and damper are compressed, they will absorb and cancel the shock energy of the fixed block, which can achieve good shock resistance and protection. It converts some of the kinetic energy into elastic potential energy and then releases it slowly, reducing the force directly transmitted to the hand, and is highly practical. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a front sectional view of the overall structure of this utility model.

[0021] Reference numerals in the attached diagram: 1. Expansion screw tube; 2. Expansion screw inner core; 3. Locking screw sleeve; 4. Fixing sleeve; 5. Top block; 6. Fixing block; 7. Holding sleeve; 8. Buffer spring; 9. Damper; 10. Nitrile rubber sleeve; 11. Reinforcing strip. Detailed Implementation

[0022] The present invention will be further described in detail below with reference to the accompanying drawings.

[0023] Example 1:

[0024] refer to Figure 1 and Figure 2 An expansion screw locking device includes an expansion screw tube 1, an expansion screw inner core 2 inside the expansion screw tube 1, a locking sleeve 3 threadedly connected to the surface of the expansion screw inner core 2, a fixing sleeve 4 slidably sleeved on the surface of the locking sleeve 3, a top block 5 installed at the top of the locking sleeve 3, and fixing blocks 6 symmetrically welded to the surface of the fixing sleeve 4. The device is operated by first fitting the fixing sleeve 4 onto the locking sleeve 3 and pulling it to its highest position. After the fixing sleeve 4 is fitted, the bottom end of the locking sleeve 3 is screwed downwards onto the expansion screw inner core 2. After the locking sleeve 3 is connected to the expansion screw inner core 2, the expansion screw tube 1 is locked into the thread of the steel block water pipe plug. Finally, the nitrile rubber sleeve 10 is held by hand and pulled forcefully to pull the expansion screw inner core 2 to a certain position until the expansion screw tube 1 expands to its optimal state. This device can efficiently lock the expansion screw, is efficient and convenient to install, and ensures that the plug expands to its limit.

[0025] refer to Figure 2 The top of the top block 5 has an internal hexagonal groove. The internal hexagonal groove allows personnel to use tools to rotate the top block 5 and the locking nut 3, making it easy to screw the locking nut 3 into the surface of the expansion screw core 2 or remove it.

[0026] refer to Figure 1 and Figure 2 The locking screw 3, fixing cylinder 4 and top block 5 are all made of stainless steel. The locking screw 3, fixing cylinder 4 and top block 5 have the characteristics of high strength, low density and excellent corrosion resistance.

[0027] refer to Figure 1 The expansion screw tube 1 has an integrally formed reinforcing strip 11 on its surface. The reinforcing strip 11 enhances the stability of the expansion screw tube 1 when it is locked into the steel block water channel plug.

[0028] Brief description of the usage process: First, put the fixing sleeve 4 onto the locking screw sleeve 3 and pull it to the highest position. After the fixing sleeve 4 is put on, screw the bottom end of the locking screw sleeve 3 downwards into the inner core 2 of the expansion screw. After the locking screw sleeve 3 is connected to the inner core 2 of the expansion screw, lock the expansion tube 1 of the expansion screw into the thread of the steel block water channel plug. Finally, hold the nitrile rubber sleeve 10 by hand and pull it forcefully to pull the inner core 2 of the expansion screw to a certain position until the expansion tube 1 of the expansion screw expands to the optimal state.

[0029] Example 2:

[0030] refer to Figure 1 and Figure 2An expansion screw locking device is described, wherein a gripping sleeve 7 is slidably sleeved on the surface of a fixing block 6, and a buffer spring 8 is bolted between the other end of the fixing block 6 and the gripping sleeve 7 via a spring fixing plate. A damper 9 is installed between the other end of the fixing block 6 and the gripping sleeve 7. When the nitrile rubber sleeve 10 is gripped and pulled forcefully, the top end of the fixing sleeve 4 will violently impact the top block 5. When the top end of the fixing sleeve 4 impacts the top block 5, not only will the impact force be transmitted downward to the fixing block 6, but it will also cause the person's hand and the gripping nitrile rubber sleeve 10 to move inward. When the nitrile rubber sleeve 10 moves inward, it will compress the buffer spring 8 and the damper 9. When the buffer spring 8 and the damper 9 are compressed, they will absorb and cancel the shock energy of the fixing block 6, which can achieve good shock protection effect, convert some kinetic energy into elastic potential energy and then release it slowly, reduce the force directly transmitted to the hand, and have high practicality.

[0031] refer to Figure 1 and Figure 2 The surface of the grip tube 7 is fixedly fitted with a nitrile rubber sleeve 10, which can play a role in shock absorption and anti-slip.

[0032] refer to Figure 2 The buffer spring 8 is made of carbon spring steel and has excellent mechanical properties, good spring damping performance, low temperature resistance and corrosion resistance.

[0033] Brief description of the usage process: By forcefully pulling the nitrile rubber sleeve 10, the top of the fixed cylinder 4 will violently impact the top block 5. When the top of the fixed cylinder 4 impacts the top block 5, the impact force will not only be transmitted downward to the fixed block 6, but also cause the person's hand and the nitrile rubber sleeve 10 being held to move inward. When the nitrile rubber sleeve 10 moves inward, it will compress the buffer spring 8 and the damper 9. When the buffer spring 8 and the damper 9 are compressed, they will absorb and cancel the shock energy of the fixed block 6.

[0034] It should be noted that parts have a lifespan and can be replaced during regular maintenance when they no longer meet performance requirements. Deterioration in performance due to prolonged use of parts is not a design defect of this application.

[0035] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

Claims

1. An expansion screw locking device comprising an expansion screw expander (1), characterized in that: The expansion screw tube (1) is provided with an expansion screw core (2) inside. The expansion screw core (2) is threaded with a locking sleeve (3). The locking sleeve (3) is slidably sleeved with a fixing cylinder (4). A top block (5) is installed at the top of the locking sleeve (3). Fixing blocks (6) are symmetrically welded to the surface of the fixing cylinder (4). A holding cylinder (7) is slidably sleeved on the surface of the fixing block (6). A buffer spring (8) is bolted between the other end of the fixing block (6) and the holding cylinder (7) through a spring fixing plate. A damper (9) is installed between the other end of the fixing block (6) and the holding cylinder (7).

2. An expansion screw locking device according to claim 1, wherein: The top of the top block (5) has an internal hexagonal groove.

3. The expansion screw locking device according to claim 1, characterized in that: The locking nut (3), the fixing cylinder (4) and the top block (5) are all made of stainless steel.

4. The expansion screw locking device of claim 1, wherein: The expansion screw tube (1) has an integrally formed reinforcing strip (11) on its surface.

5. The expansion screw fastening device of claim 1, wherein: The surface of the grip tube (7) is fixedly fitted with a nitrile rubber sleeve (10).

6. An expansion screw fastening device according to claim 1, wherein: The buffer spring (8) is made of carbon spring steel.

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