Auxiliary fixing device for crank machining

Abstract

The utility model relates to an auxiliary fixing device for crank machining. The auxiliary fixing device comprises a bottom plate, a crank disc positioning mechanism and a connecting rod positioning mechanism. The crank disc positioning mechanism comprises a containing cavity, the containing cavity is formed in the bottom plate, a two-way threaded rod is rotatably mounted in the containing cavity, two threaded sleeves are connected to the two-way threaded rod in a threaded mode, and limiting blocks are fixedly mounted at the bottoms of the two threaded sleeves; limiting grooves located in the outer surfaces of the two limiting blocks are formed in the inner bottom wall of the containing cavity. According to the auxiliary fixing device for crank machining, by arranging the crank disc positioning mechanism, a disc of a crank can be clamped between two positioning pieces to be fixed, and by arranging the connecting rod positioning mechanism, a connecting rod of the crank can be clamped between a fixed piece and a movable piece to be fixed; and the crank disc positioning mechanism and the connecting rod positioning mechanism meet the requirement for fixing cranks of different sizes.

Description

Technical Field

[0001] The utility model relates to the technical field of crank processing, in particular to a crank processing auxiliary fixing device. Background Art

[0002] Crank is a term in mechanical engineering, referring to the part of the crankshaft consisting of a crank pin and two connected crank arms. For parts like cranks, their processing usually involves multiple processes, including turning, milling, drilling, etc., and the design and use of fixtures are crucial to ensure the smooth progress of these processes.

[0003] After searching, for example, the utility model patent with Chinese patent publication number CN220718532U discloses a clamp suitable for crank processing, including a base and a clamp structure, support columns are integrally formed on the left and right sides of the top of the base, and the clamp structure is installed on the left and right sides of the top of the base; the clamp structure includes an electric telescopic rod, the electric telescopic rod is bolted to the support column, the output end of the electric telescopic rod is directed to the side facing the middle of the base, a damper is welded to the output end of the electric telescopic rod, and the telescopic rod is plugged into the side of the damper facing the middle of the support column; the clamp structure also includes a rubber block, the rubber block includes an outer rubber block and an inner rubber block, and the outer rubber block is bonded to the outside of the output end of the electric telescopic rod; the clamp suitable for crank processing has the advantages of a clamp structure installed on the top of the base, and the clamp structure can flexibly clamp cranks of different specifications on the lifting platform, thereby enhancing the practicality of the clamp.

[0004] A crank generally consists of a disk (usually called a crank disk or a crankshaft disk) and a connecting rod connected thereto. However, the above-mentioned utility model device cannot fix the crank disk and the connecting rod at the same time. It can only provide clamping force for a single part of the disk or the connecting rod, but cannot take both into account. The fixing effect is not ideal. Therefore, a crank processing auxiliary fixing device is proposed to solve the above problem. Utility Model Content

[0005] In view of the shortcomings of the prior art, the utility model provides a crank processing auxiliary fixing device, which has the advantages of good fixing effect, etc., and solves the problem that the above-mentioned utility model device can only provide clamping force for a single part of the disc or the connecting rod, but cannot take both into account, resulting in unsatisfactory fixing effect.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a crank processing auxiliary fixing device, comprising a base plate, a crank plate positioning mechanism and a connecting rod positioning mechanism;

[0007] The crank plate positioning mechanism comprises an accommodating cavity, the bottom plate is provided with an accommodating cavity, a bidirectional threaded rod is rotatably installed inside the accommodating cavity, two threaded sleeves are threadedly connected to the bidirectional threaded rod, the bottoms of the two threaded sleeves are fixedly installed with limit blocks, the inner bottom wall of the accommodating cavity is provided with limit grooves located on the outer surfaces of the two limit blocks, the tops of the two threaded sleeves are fixedly installed with connecting rods, and the tops of the two connecting rods are fixedly installed with positioning sheets;

[0008] The connecting rod positioning mechanism includes a mounting frame, which drives the mounting frame to be fixedly installed on the top of the base plate, and the top of the mounting frame is provided with a fixed plate and a movable plate, an operating rod is rotatably installed on the rear side wall of the movable plate, a sliding rod is fixedly installed on the bottom of the movable plate, and a sliding groove is opened on the top of the base plate on the outer surface of the sliding rod.

[0009] Furthermore, a circular hole is opened on the front side wall of the bottom plate, one end of the bidirectional threaded rod is rotatably connected to the inner wall of the accommodating cavity, and the other end passes through the circular hole and extends to the outside of the bottom plate.

[0010] Furthermore, the two limit blocks are slidably connected to the limit grooves, and a protective pad 1 is fixedly installed on the opposite side of the two positioning pieces.

[0011] Furthermore, the mounting frame is in a U-shaped structure, the sliding rod is slidably connected to the sliding groove, and a protective pad 2 is fixedly installed on the opposite side of the fixed plate and the movable plate.

[0012] Furthermore, a threaded hole located on the outer surface of the operating rod is opened on the rear side wall of the mounting frame, and the operating rod is threadedly connected to the mounting frame through the threaded hole.

[0013] Furthermore, mounting holes are provided at the four corners of the base plate.

[0014] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0015] The crank processing auxiliary fixing device can clamp the crank disc between two positioning plates to fix it by setting a crank disc positioning mechanism, and can clamp the connecting rod of the crank between a fixed plate and a movable plate to fix it by setting a connecting rod positioning mechanism. The crank disc positioning mechanism and the connecting rod positioning mechanism can meet the needs of fixing cranks of different sizes, and can fix both the disc and the connecting rod at the same time, greatly improving the fixing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0017] Figure 2 It is a top view of the utility model;

[0018] Figure 3 This is a left side view of the crank plate positioning mechanism of the utility model;

[0019] Figure 4 It is the right side view of the connecting rod positioning mechanism of the utility model.

[0020] In the figure: 1, base plate; 2, crank disk positioning mechanism; 201, accommodating chamber; 202, bidirectional threaded rod; 203, threaded sleeve; 204, limit block; 205, limit groove; 206, connecting rod; 207, positioning plate; 3, connecting rod positioning mechanism; 301, mounting frame; 302, fixed plate; 303, movable plate; 304, operating rod; 305, sliding rod; 306, sliding groove. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] See also Figure 1-4 A crank processing auxiliary fixing device in this embodiment includes a base plate 1, a crank disk positioning mechanism 2 and a connecting rod positioning mechanism 3.

[0023] The crank disk positioning mechanism 2 includes an accommodating cavity 201. The accommodating cavity 201 is opened inside the base plate 1. A bidirectional threaded rod 202 is rotatably installed inside the accommodating cavity 201. Two threaded sleeves 203 are threadedly connected on the bidirectional threaded rod 202. Limiting blocks 204 are fixedly installed at the bottom of the two threaded sleeves 203. A limiting groove 205 located on the outer surface of the two limiting blocks 204 is opened on the inner bottom wall of the accommodating cavity 201. Connecting rods 206 are fixedly installed on the tops of the two threaded sleeves 203. Positioning plates 207 are fixedly installed on the tops of the two connecting rods 206.

[0024] A circular hole is provided on the front side wall of the base plate 1, and one end of the bidirectional threaded rod 202 extends to the outside of the base plate 1 through the circular hole. The bidirectional threaded rod 202 is rotated outside the base plate 1 to adjust the distance between the two positioning plates 207. According to different models of cranks, the size is adjusted to fit the disc, and the disc is fixed between the two positioning plates 207.

[0025] The two limit blocks 204 are both slidably connected to the limit grooves 205. Through the sliding cooperation between the two limit blocks 204 and the limit grooves 205, when the bidirectional threaded rod 202 rotates, the two threaded sleeves 203 can drive the two positioning pieces 207 to move relative to or oppositely.

[0026] A protective pad 1 is fixedly installed on one side opposite to the two positioning pieces 207. The protective pad 1 is provided to prevent the two positioning pieces 207 from directly contacting the surface of the disc, thereby protecting the disc.

[0027] The connecting rod positioning mechanism 3 includes a mounting frame 301, which drives the mounting frame 301 to be fixedly installed on the top of the base plate 1, and a fixed plate 302 and a movable plate 303 are arranged on the top of the mounting frame 301. An operating rod 304 is rotatably installed on the rear side wall of the movable plate 303, a sliding rod 305 is fixedly installed on the bottom of the movable plate 303, and a sliding groove 306 located on the outer surface of the sliding rod 305 is opened on the top of the base plate 1.

[0028] A threaded hole is provided on the rear side wall of the mounting frame 301 and is located on the outer surface of the operating rod 304 . The operating rod 304 is threadedly connected to the rear side wall of the mounting frame 301 through the threaded hole. When the operating rod 304 is rotated, the position of the movable sheet 303 can be adjusted.

[0029] The slide bar 305 is slidably connected to the slide groove 306. When the operating rod 304 is rotated, the movable plate 303 can move away from or close to the fixed plate 302 through the cooperation of the slide bar 305 and the slide groove 306. Therefore, according to the different sizes of the connecting rod, the fixed plate 302 and the movable plate 303 can be adjusted to a suitable distance to fix the connecting rod.

[0030] The four corners of the bottom plate 1 are provided with mounting holes, through which the device can be conveniently installed at the position where it is needed.

[0031] When implementing, follow these steps:

[0032] 1) First, fix the device to the position where it needs to be used through the four mounting holes on the base plate 1;

[0033] 2) Then, the crank disk structure is placed between the two positioning pieces 207, and the two-way threaded rod 202 is rotated to drive the two threaded sleeves 203 to slide relatively in the limiting groove 205 through the limiting block 204 at the bottom, so that the two threaded sleeves 203 move in opposite directions, and the two sides of the disk are clamped and fixed between the two positioning pieces 207;

[0034] 3) The connecting rod of the crank is then placed between the fixed plate 302 and the movable plate 303, and the operating rod 304 is rotated so that the operating rod 304 moves in the threaded hole in a direction close to the movable plate 303, thereby driving the movable plate 303 to move in a direction close to the fixed plate 302 through the cooperation of the sliding rod 305 and the sliding groove 306, and the connecting rod is clamped and fixed between the fixed plate 302 and the movable plate 303;

[0035] 4) Finally, the disc and connecting rod are fixed.

[0036] In summary, the crank processing auxiliary fixing device, by setting up a crank disk positioning mechanism 2, can clamp the crank disk between two positioning plates 207 to fix it, and by setting up a connecting rod positioning mechanism 3, can clamp the crank connecting rod between a fixed plate 302 and a movable plate 303 to fix it, and the crank disk positioning mechanism 2 and the connecting rod positioning mechanism 3 meet the needs of fixing cranks of different sizes, and can fix both the disk and the connecting rod at the same time, greatly improving the fixing effect.

[0037] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0038] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A crank machining auxiliary fixing device, comprising a base plate (1), a crank plate positioning mechanism (2) and a connecting rod positioning mechanism (3); The crank plate positioning mechanism (2) comprises a receiving cavity (201), the bottom plate (1) is provided with a receiving cavity (201), a bidirectional threaded rod (202) is rotatably mounted inside the receiving cavity (201), two threaded sleeves (203) are threadedly connected to the bidirectional threaded rod (202), the bottoms of the two threaded sleeves (203) are fixedly mounted with limiting blocks (204), the inner bottom wall of the receiving cavity (201) is provided with limiting grooves (205) located on the outer surfaces of the two limiting blocks (204), the tops of the two threaded sleeves (203) are fixedly mounted with connecting rods (206), and the tops of the two connecting rods (206) are fixedly mounted with positioning sheets (207); The connecting rod positioning mechanism (3) comprises a mounting frame (301), which drives the top of the base plate (1) to be fixedly mounted with the mounting frame (301), the top of the mounting frame (301) is provided with a fixed plate (302) and a movable plate (303), an operating rod (304) is rotatably mounted on the rear side wall of the movable plate (303), a sliding rod (305) is fixedly mounted on the bottom of the movable plate (303), and a sliding groove (306) located on the outer surface of the sliding rod (305) is opened on the top of the base plate (1).

2. The crank machining auxiliary fixing device according to claim 1, characterized in that: A circular hole is provided on the front side wall of the bottom plate (1); one end of the bidirectional threaded rod (202) is rotatably connected to the inner wall of the accommodating cavity (201), and the other end passes through the circular hole and extends to the outside of the bottom plate (1).

3. The crank machining auxiliary fixing device according to claim 1, characterized in that: The two limit blocks (204) are both slidably connected to the limit groove (205), and a protective pad 1 is fixedly installed on the opposite side of the two positioning pieces (207).

4. The crank machining auxiliary fixing device according to claim 1, characterized in that: The mounting frame (301) is in a U-shaped structure, the sliding rod (305) is slidably connected to the sliding groove (306), and a second protective pad is fixedly mounted on the opposite side of the fixed plate (302) and the movable plate (303).

5. The crank machining auxiliary fixing device according to claim 1, characterized in that: A threaded hole located on the outer surface of the operating rod (304) is provided on the rear side wall of the mounting frame (301), and the operating rod (304) is threadedly connected to the mounting frame (301) through the threaded hole.

6. The crank machining auxiliary fixing device according to claim 1, characterized in that: The four corners of the base plate (1) are all provided with mounting holes.

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