Movable block structure of vacuum pump rear end cover steel pipe positioning mold

Abstract

The utility model discloses a movable block structure of a vacuum pump rear end cover steel pipe positioning die, which comprises a U-shaped steel pipe inserted in a die body, a movable block and two side blocks, the opening end of the U-shaped steel pipe extends out of a cavity of the die body, the movable block and the two side blocks are positioned outside the cavity of the die body, the movable block is positioned between the two side blocks, and the U-shaped steel pipe is inserted into the cavity of the die body. The upper end and the lower end of the movable block are slidably connected with the edge blocks at the corresponding positions respectively, the two edge blocks are connected with the outer end of the U-shaped steel pipe in a clamped mode, the movable block comprises two expansion plates, and the two expansion plates are connected through an elastic mechanism. The overall height of the movable block can be changed through the elastic mechanism, so that the two side blocks can adapt to clamping work of U-shaped steel pipes of different sizes, and the application range is widened; the three-layer blocky structure is clamped with the U-shaped steel pipe, so that the relative movement of the steel pipe is avoided, the problem of strain of the steel pipe is solved, the later grinding and polishing of the steel pipe are also avoided, and the problem of air leakage of cold connection of the clamp is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of mold manufacturing equipment, and more specifically, particularly relates to a movable block structure of a steel pipe positioning mold for a rear end cover of a vacuum pump. Background Art

[0002] At present, when domestic foundry manufacturers cast the rear end cover of the vacuum pump, the part of the steel pipe extending out of the casting is generally directly inserted into the mold. This casting method is relatively simple, but it also causes relative movement between the steel pipe and the mold when demolding. The movement process causes the steel pipe to be strained. Because the steel pipe is cold-connected with a clamp in the later stage, the strained steel pipe needs to be polished to avoid air leakage at the strained part. Excessive polishing can also easily cause air leakage. Utility Model Content

[0003] The utility model aims to provide a movable block structure of a steel pipe positioning die for a rear end cover of a vacuum pump.

[0004] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is as follows: a movable block structure of a steel pipe positioning mold for the rear end cover of a vacuum pump, comprising a U-shaped steel pipe inserted in a mold body, the open end of the U-shaped steel pipe extending out of the mold body cavity, and also comprising a movable block and two side blocks located outside the mold body cavity, the movable block being located between the two side blocks, the upper and lower ends of the movable block being respectively slidably connected to the side blocks at corresponding positions, the two side blocks being clamped with the outer end portions of the U-shaped steel pipe, the movable block comprising two expansion plates, and the two expansion plates being connected by an elastic mechanism.

[0005] Preferably, a T-shaped sliding groove is provided on one side of the edge block relative to the expansion plate position, and protruding ribs of an integral structure are provided on both sides of the expansion plate, and the expansion plate is slidably connected to the T-shaped sliding groove through the protruding ribs.

[0006] Preferably, the elastic mechanism comprises a spring and two scissor rods, both ends of the two scissor rods are movably hinged to the inner sides of the two expansion plates, and the spring is fixedly installed in the middle position between the two expansion plates.

[0007] Preferably, an arc-shaped groove is provided on the outer side of the edge block, and the arc-shaped groove is engaged with the outer end of the U-shaped steel pipe.

[0008] Preferably, protruding handles are fixedly mounted on both side edges of the expansion plate.

[0009] Preferably, a sealing ring is provided on the fixed sleeve at the outer end of the U-shaped steel pipe, and the sealing ring is located between the mold body and the edge block.

[0010] Compared with the prior art, the advantages of the utility model are:

[0011] The movable block of the utility model can change the overall height through an elastic mechanism, so that the two side blocks can adapt to the clamping work of U-shaped steel pipes of different sizes, thereby increasing the scope of application;

[0012] By clamping the three-layer block structure with the U-shaped steel pipe, the relative movement of the steel pipe is avoided, the problem of steel pipe strain is solved, and the subsequent grinding and polishing of the steel pipe is avoided, which solves the problem of air leakage in the cold connection of the clamp. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0014] Figure 1 This is a schematic diagram of the installation state of a movable block structure of a steel pipe positioning mold for a rear end cover of a vacuum pump according to the utility model;

[0015] Figure 2 This is a structural diagram of a movable block structure of a steel pipe positioning mold for a rear end cover of a vacuum pump according to the utility model;

[0016] Figure 3 It is a structural diagram of the movable block and the edge block of the utility model.

[0017] In the figure: 1 U-shaped steel pipe, 11 sealing ring, 2 movable block, 21 expansion plate, 211 protruding rib, 3 side block, 31 arc groove, 32 T-shaped slide groove, 4 elastic mechanism, 41 scissor rod, 42 spring, 5 mold body, 6 protruding handle. DETAILED DESCRIPTION

[0018] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0019] See also Figure 1 , Figure 2 and Figure 3As shown, the utility model provides a movable block structure of a steel pipe positioning mold for a rear end cover of a vacuum pump, comprising a U-shaped steel pipe 1 inserted in a mold body 5, the open end of the U-shaped steel pipe 1 extending outside the mold cavity of the mold body 5, and also comprising a movable block 2 and two side blocks 3 located outside the mold cavity of the mold body 5, the movable block 2 is made of high-strength H13 material, the movable block 2 is located between the two side blocks 3, the upper and lower ends of the movable block 2 are respectively slidably connected to the side blocks 3 at corresponding positions, the two side blocks 3 are clamped with the outer end of the U-shaped steel pipe 1, the movable block 2 comprises two expansion plates 21, the two expansion plates 21 are connected by an elastic mechanism 4, the elastic mechanism 4 can ensure that the two expansion plates 21 can always be stably connected to the movable block 2, to prevent the movable block 2 from sliding easily.

[0020] In this embodiment, a T-shaped sliding groove opening 32 is opened on one side of the edge block 3 relative to the position of the rising plate 21, and protruding ribs 211 of an integral structure are provided on both sides of the rising plate 21. The rising plate 21 is slidably connected to the T-shaped sliding groove opening 32 through the protruding ribs 211.

[0021] Furthermore, in order to adjust the spacing between the two expansion plates 21, in the present embodiment, the elastic mechanism 4 includes a spring 42 and two scissor rods 41. The two ends of the two scissor rods 41 are movably hinged to the inner sides of the two expansion plates 21, and the spring 42 is fixedly installed in the middle position between the two expansion plates 21. The spring 42 plays an elastic role to ensure that the two expansion plates 21 can be stably connected to the side blocks 3, thereby preventing the expansion plates 21 from easily moving from the side blocks 3.

[0022] Furthermore, in order to facilitate the clamping of the U-shaped steel pipe 1 , in this embodiment, an arc-shaped groove 31 is opened on the outer side of the side block 3 , and the arc-shaped groove 31 is clamped with the outer end of the U-shaped steel pipe 1 .

[0023] Furthermore, in order to facilitate the staff to adjust the distance between the two expansion plates 21, in this embodiment, protruding handles 6 are fixedly installed on both sides of the expansion plates 21. The staff can hold the protruding handles 6 to adjust the distance between the two expansion plates 21 to adapt to U-shaped steel pipes 1 with different spacing sizes.

[0024] Furthermore, in order to ensure sealing, in the present embodiment, a sealing ring 11 is fixedly sleeved on the outer end of the U-shaped steel pipe 1 , and the sealing ring 11 is located between the mold body 5 and the edge block 3 .

[0025] The specific operation steps are as follows: during casting, the movable block 2 and the side block 3 are first combined with the U-shaped steel pipe 1, and then placed in the mold body 5. After the mold is closed and poured, the movable block 2 and the side block 3 are lifted up by the upper mold of the mold body 5 together with the casting, and then the movable block 2 is taken out first, and then the two side blocks 3 are moved to the middle to separate from the steel pipe and then moved along the opening direction of the U-shaped steel pipe 1 to be smoothly taken out.

[0026] Although the embodiments of the present invention are described in conjunction with the accompanying drawings, the patent owner may make various variations or modifications within the scope of the appended claims. As long as they do not exceed the protection scope described in the claims of the present invention, they should be within the protection scope of the present invention.

Claims

1. A movable block structure of a steel pipe positioning mold for a rear end cover of a vacuum pump, comprising a U-shaped steel pipe inserted in a mold body, the opening end of the U-shaped steel pipe extending outside the mold cavity of the mold body, characterized in that: It also includes a movable block and two side blocks located outside the mold body cavity, the movable block is located between the two side blocks, the upper and lower ends of the movable block are respectively slidably connected to the side blocks at corresponding positions, the two side blocks are clamped with the outer ends of the U-shaped steel pipe, and the movable block includes two expansion plates, which are connected by an elastic mechanism.

2. The movable block structure of the steel pipe positioning mold for the rear end cover of a vacuum pump according to claim 1 is characterized in that: A T-shaped sliding groove is provided on one side of the edge block relative to the expansion plate position, and protruding ribs of an integral structure are provided on both sides of the expansion plate, and the expansion plate is slidably connected to the T-shaped sliding groove through the protruding ribs.

3. The movable block structure of the steel pipe positioning mold for the rear end cover of a vacuum pump according to claim 1 is characterized in that: The elastic mechanism comprises a spring and two scissor rods, both ends of the two scissor rods are respectively movably hinged to the inner sides of the two expansion plates, and the spring is fixedly installed in the middle position between the two expansion plates.

4. The movable block structure of the steel pipe positioning mold for the rear end cover of a vacuum pump according to claim 1, characterized in that: An arc-shaped groove is provided on the outer side of the edge block, and the arc-shaped groove is engaged with the outer end of the U-shaped steel pipe.

5. The movable block structure of the steel pipe positioning mold for the rear end cover of a vacuum pump according to claim 1, characterized in that: Protruding handles are fixedly installed on both side edges of the expansion plate.

6. The movable block structure of the steel pipe positioning mold for the rear end cover of a vacuum pump according to claim 1, characterized in that: The fixed sleeve at the outer end of the U-shaped steel pipe is provided with a sealing ring, and the sealing ring is located between the mold body and the edge block.

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