Lower bearing seat hole machining clamp

Abstract

The utility model belongs to the technical field of machine manufacturing, and particularly relates to a lower bearing seat hole machining clamp. The fixture comprises a fixture bottom plate, and a positioning mandrel used for positioning a central bearing hole of a lower bearing seat is arranged at the central point of the fixture bottom plate. The lower bearing seat to be machined is placed on the clamp bottom plate, the positioning mandrel is inserted into the central bearing hole of the lower bearing seat for central positioning, and the outer side face of the supporting foot of the lower bearing seat is matched with the inner side of the radial hole machining positioning structure in an abutting mode. The lower bearing seat pressing and fixing structure is rotated to the position over the supporting legs of the lower bearing seat and then is pressed downwards, the lower bearing seat is fixed in multiple directions through the radial hole machining and positioning structure and the lower bearing seat pressing and fixing structure, and the lower bearing seat is prevented from shaking in the punching process; and meanwhile, after the lower bearing seat is fixed by the radial hole machining and positioning structure and the lower bearing seat pressing and fixing structure, subsequent punching in the axial direction and the radial direction of the lower bearing seat cannot be affected, and the punching efficiency and precision are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of mechanical manufacturing, and relates to a fixture, in particular to a fixture for machining the holes of a lower bearing seat. Background Art

[0002] The lower bearing seat is an important part of a scroll air conditioner compressor. Its shape has a bearing hole in the middle, and the mating surfaces of the three outer circular feet are evenly distributed in a 120-degree triangular star shape. Therefore, the outer circular surface is divided into three sections. There is a large bearing hole in the central part of the lower bearing seat, and there are also three radial holes and three axial holes on the three feet. Before leaving the factory, a drilling process needs to be carried out on the radial holes and axial holes on the feet of the lower bearing seat, and a fixture needs to be used in cooperation. During the use of the existing lower bearing seat fixture, it is easy to interfere with the drilling of the radial holes and axial holes of the feet of the lower bearing seat, affecting the forming accuracy and efficiency of the radial holes and axial holes.

[0003] In order to overcome the deficiencies of the prior art, people have continuously explored and proposed various solutions. For example, a Chinese patent discloses a bearing seat fixture [Application No.: 202410556209.X], which includes a bottom plate. A fixing structure is provided on the bottom plate, an adjusting structure is provided on the fixing structure, a release structure is connected between the adjusting structure and the fixing structure, a clamping structure is provided on the bottom plate, a stabilizing structure is connected to the fixing structure, and a positioning structure is connected between the clamping structure and the bottom plate; through the fixing structure, the fixing methods for milling and boring the bearing seat can be satisfied at the same time. Through the adjusting structure, the clamping distance for the bearing seat can be adjusted. Through the release structure, the fixing range of the device can be adjusted and fixed. Through the clamping structure, the bearing sleeve can be limited during boring processing. Through the stabilizing structure, the bearing seat placed on the bearing plate can be preliminarily positioned to facilitate fixing. However, after the lower bearing seat is clamped and fixed by this solution, interference is still likely to occur in the areas of the radial holes and axial holes of the feet of the lower bearing seat to be machined, and there are defects that affect the forming accuracy and efficiency of the radial holes and axial holes. Summary of the Utility Model

[0004] The purpose of the utility model is to solve the above problems and provide a fixture for machining the holes of a lower bearing seat. The technical problem to be solved by the utility model is how to efficiently machine the radial holes and axial holes on the three feet of the lower bearing seat after fixing the lower bearing seat.

[0005] To achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A fixture for machining the hole of the lower bearing seat, including a fixture base plate. At the center point of the fixture base plate, there is a positioning mandrel for positioning the central bearing hole of the lower bearing seat. On the fixture base plate, there are several radial hole machining positioning structures and lower bearing seat pressing and fixing structures that are annularly arrayed along the center point of the fixture base plate. The inner side of the radial hole machining positioning structure abuts against the outer side surface of the support leg of the lower bearing seat. When the lower bearing seat pressing and fixing structure rotates above the support leg of the lower bearing seat, the lower bearing seat pressing and fixing structure can move downward to press and hold the support leg of the lower bearing seat.

[0007] In the above-mentioned fixture for machining the hole of the lower bearing seat, the radial hole machining positioning structure includes lower bearing seat positioning side blocks arranged on the fixture base plate. The number of the lower bearing seat positioning side blocks is three, and the included angle between the extension intersection points of the center lines of two adjacent lower bearing seat positioning side blocks is 120°.

[0008] In the above-mentioned fixture for machining the hole of the lower bearing seat, the lower bearing seat positioning side block has a radially arranged machining area that horizontally penetrates the lower bearing seat positioning side block.

[0009] In the above-mentioned fixture for machining the hole of the lower bearing seat, the inner arc surface of the lower bearing seat positioning side block abuts against the outer arc surface of the support leg of the lower bearing seat.

[0010] In the above-mentioned fixture for machining the hole of the lower bearing seat, a positioning cushion block is arranged at the bottom of the lower bearing seat positioning side block, and the positioning cushion block is connected to the lower bearing seat positioning side block through a clamping connection structure.

[0011] In the above-mentioned fixture for machining the hole of the lower bearing seat, the clamping connection structure includes a clamping protrusion arranged at the bottom of the lower bearing seat positioning side block. A clamping groove that matches the shape of the clamping protrusion is arranged in the positioning cushion block, and several screws are installed at the joint surface between the positioning cushion block and the lower bearing seat positioning side block.

[0012] In the above-mentioned fixture for machining the hole of the lower bearing seat, the lower bearing seat pressing and fixing structure includes a lower pressure plate arranged on the fixture base plate. The number of the lower pressure plates is three. A cylinder is arranged below the lower pressure plate, and the cylinder is connected to the lower pressure plate through a piston rod. When the lower pressure plate rotates above the support leg of the lower bearing seat, the lower pressure plate can move downward to press and hold the top step surface of the support leg of the lower bearing seat.

[0013] In the above-mentioned fixture for machining the hole of the lower bearing seat, three cylinder elevation blocks are arranged on the fixture base plate. One end of the cylinder elevation block is fixed to the fixture base plate, and the other end is fixed to the cylinder.

[0014] In the above-mentioned fixture for machining the hole of the lower bearing seat, a fixture backing is installed on one of the positioning cushion blocks, and the fixture backing has a side step abutting part for the lower bearing seat.

[0015] In the above-mentioned fixture for machining the lower bearing seat hole, a chip removal groove is formed between the fixture backing plate and the positioning side block of the lower bearing seat, and the fixture backing plate and the positioning cushion block are fixed by screws.

[0016] Compared with the existing technology, the advantages of the present utility model are as follows:

[0017] 1. During the use of the present utility model, the lower bearing seat to be machined is placed on the fixture base plate, so that the positioning mandrel is inserted into the central bearing hole of the lower bearing seat for central positioning. The outer side surface of the support leg of the lower bearing seat abuts against the inner side of the radial hole machining positioning structure. After rotating the lower bearing seat pressing and fixing structure to the position directly above the support leg of the lower bearing seat and then pressing it downwards, the lower bearing seat is fixed in multiple directions by the radial hole machining positioning structure and the lower bearing seat pressing and fixing structure, avoiding the shaking of the lower bearing seat during the drilling process. At the same time, the radial hole machining positioning structure and the lower bearing seat pressing and fixing structure will not affect the subsequent axial and radial drilling of the lower bearing seat after fixing the lower bearing seat, improving the drilling efficiency and accuracy.

[0018] 2. When the inner arc surface of the positioning side block of the lower bearing seat abuts against the outer arc surface of the support leg of the lower bearing seat, the side step surface of one support leg of the lower bearing seat abuts against the lower bearing seat side step abutting part on the fixture backing plate, restricting the rotational freedom of the Z-axis of the lower bearing seat.

[0019] Other advantages, objectives and features of the present utility model will be partially reflected by the following description, and partially will also be understood by those skilled in the art through the research and practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is the usage state diagram of the present utility model.

[0021] Figure 2 is the structural schematic diagram of the present utility model.

[0022] Figure 3 is the structural schematic diagram of the radial hole machining positioning structure.

[0023] Figure 4 is the exploded view of the radial hole machining positioning structure.

[0024] Figure 5 is the structural schematic diagram of the fixture backing plate.

[0025] Figure 6 is the structural schematic diagram of the lower bearing seat.

[0026] In the figure: fixture base plate 1, positioning mandrel 2, radial hole machining positioning structure 3, lower bearing block positioning side block 3a, radial hole machining area 3b, lower bearing block downward pressing and fixing structure 4, lower pressing plate 4a, cylinder 4b, cylinder heightening block 4c, positioning cushion block 5, clamping protrusion 6, fixture backrest 7, lower bearing block side step abutting part 7a, chip removal groove 8, lower bearing block 100, lower bearing block central bearing hole 200, support leg 300. Detailed implementation mode

[0027] The present utility model will be further described below in conjunction with the accompanying drawings.

[0028] As Figure 1-6 shown, a lower bearing block hole machining fixture includes a fixture base plate 1. At the center point of the fixture base plate 1, there is a positioning mandrel 2 for positioning the lower bearing block central bearing hole 200. On the fixture base plate 1, there are a number of radial hole machining positioning structures 3 and lower bearing block downward pressing and fixing structures 4 that are annularly arrayed along the center point of the fixture base plate 1. The inner side of the radial hole machining positioning structure 3 abuts against the outer side surface of the support leg 300 of the lower bearing block 100. When the lower bearing block downward pressing and fixing structure 4 rotates to above the support leg 300 of the lower bearing block 100, the lower bearing block downward pressing and fixing structure 4 can move downward to press and hold the support leg 300 of the lower bearing block 100.

[0029] In this embodiment, during use, the lower bearing block 100 to be machined is placed on the fixture base plate 1, so that the positioning mandrel 2 is inserted into the lower bearing block central bearing hole 200 for central positioning. The outer side surface of the support leg 300 of the lower bearing block 100 abuts and cooperates with the inner side of the radial hole machining positioning structure 3. After rotating the lower bearing block downward pressing and fixing structure 4 to directly above the support leg 300 of the lower bearing block 100 and then pressing it downward, the lower bearing block 100 is fixed in multiple directions through the radial hole machining positioning structure 3 and the lower bearing block downward pressing and fixing structure 4, avoiding the shaking of the lower bearing block 100 during the drilling process. At the same time, the radial hole machining positioning structure 3 and the lower bearing block downward pressing and fixing structure 4 will not affect the subsequent axial and radial drilling of the lower bearing block 100 after fixing the lower bearing block 100, improving the drilling efficiency and accuracy.

[0030] Combined with Figure 1-6 shown, the radial hole machining positioning structure 3 includes a lower bearing block positioning side block 3a arranged on the fixture base plate 1. The number of the lower bearing block positioning side blocks 3a is three, and the included angle between the extension intersection points of the center lines of two adjacent lower bearing block positioning side blocks 3a is 120°. The lower bearing block positioning side block 3a has a radially arranged and horizontally penetrating radial hole machining area 3b, and the inner arc surface of the lower bearing block positioning side block 3a abuts against the outer arc surface of the support leg 300 of the lower bearing block 100.

[0031] In this embodiment, after the lower bearing housing 100 is centered by the positioning mandrel 2, the inner arc surface of the positioning side block 3a of the lower bearing housing abuts against the outer arc surface of the support leg 300 of the lower bearing housing 100, which can limit the freedom of movement of the lower bearing housing 100 in the X-axis direction. The radial hole machining area 3b can facilitate the machining of the radial holes of the lower bearing housing 100 by the tool, improving the drilling accuracy and efficiency.

[0032] A positioning pad 5 is provided at the bottom of the positioning side block 3a of the lower bearing housing, and the positioning pad 5 is connected to the positioning side block 3a of the lower bearing housing through a clamping connection structure.

[0033] In this embodiment, the positioning pad 5 is used to connect and fix the positioning side block 3a of the lower bearing housing to the fixture base plate 1, and at the same time, it can improve the horizontal height of the positioning side block 3a of the lower bearing housing.

[0034] Combined with Figure 4 As shown, the clamping connection structure includes a clamping protrusion 6 provided at the bottom of the positioning side block 3a of the lower bearing housing. A clamping groove 6a matching the shape of the clamping protrusion 6 is provided in the positioning pad 5, and a number of screws are installed at the joint surface between the positioning pad 5 and the positioning side block 3a of the lower bearing housing.

[0035] In this embodiment, the clamping protrusion 6 is inserted into the clamping groove 6a for positioning, and then the positioning pad 5 and the positioning side block 3a of the lower bearing housing are fixed by screwing, with high installation accuracy.

[0036] The lower bearing housing pressing and fixing structure 4 includes a lower pressing plate 4a provided on the fixture base plate 1. The number of the lower pressing plates 4a is three. A cylinder 4b is provided below the lower pressing plate 4a, and the cylinder 4b is connected to the lower pressing plate 4a through a piston rod. When the lower pressing plate 4a rotates above the support leg 300 of the lower bearing housing 100, the lower pressing plate 4a can move downward to press the top step surface of the support leg 300 of the lower bearing housing 100. Three cylinder heightening blocks 4c are provided on the fixture base plate 1. One end of the cylinder heightening block 4c is fixed to the fixture base plate 1, and the other end is fixed to the cylinder 4b.

[0037] In this embodiment, when it is necessary to press the lower bearing housing 100, after the lower pressing plate 4a rotates above the support leg 300 of the lower bearing housing 100, the cylinder 4b drives the lower pressing plate 4a to move downward to press the top step surface of the support leg 300 of the lower bearing housing 100, restricting the freedom of movement of the lower bearing housing 100 in the Y-axis direction.

[0038] Combined with Figure 1-5 As shown, a fixture backrest 7 is installed on one of the positioning pads 5, and the fixture backrest 7 has a side step abutting portion 7a of the lower bearing housing.

[0039] In this embodiment, when the inner arc surface of the lower bearing block positioning side block 3a abuts against the outer arc surface of the support leg 300 of the lower bearing block 100, the side step surface of one support leg 300 of the lower bearing block 100 abuts against the lower bearing block side step abutting portion 7a on the fixture backing 7, restricting the rotational freedom of the Z-axis of the lower bearing block 100.

[0040] Combined Figure 1-3 As shown, a chip removal groove 8 is formed between the fixture backing 7 and the lower bearing block positioning side block 3a, and the fixture backing 7 and the positioning cushion block 5 are fixed by screws.

[0041] In this embodiment, after the radial holes of the lower bearing block 100 are machined, the chip removal groove 8 can facilitate the discharge of the machined debris, facilitating the cleaning by the staff.

[0042] The working principle of the present utility model is:

[0043] During use, the lower bearing block 100 to be machined is placed on the fixture base plate 1, so that the positioning mandrel 2 is inserted into the central bearing hole 200 of the lower bearing block for central positioning. The inner arc surface of the lower bearing block positioning side block 3a abuts against the outer arc surface of the support leg 300 of the lower bearing block 100, which can restrict the translational freedom of the lower bearing block 100 in the X-axis direction. The radial hole machining area 3b can facilitate the tool to machine the radial holes of the lower bearing block 100. After rotating the lower pressure plate 4a above the support leg 300 of the lower bearing block 100, the lower pressure plate 4a is driven by the air cylinder 4b to move downward, pressing the top step surface of the support leg 300 of the lower bearing block 100, restricting the translational freedom of the lower bearing block 100 in the Y-axis direction. The side step surface of one support leg 300 of the lower bearing block 100 abuts against the lower bearing block side step abutting portion 7a on the fixture backing 7, restricting the rotational freedom of the Z-axis of the lower bearing block 100, for multi-directional fixation, avoiding the shaking of the lower bearing block 100 during the drilling process, and at the same time not affecting the subsequent axial and radial drilling of the lower bearing block 100, improving the drilling efficiency and accuracy. The positioning cushion block 5 is used to connect and fix the lower bearing block positioning side block 3a and the fixture base plate 1, and at the same time can increase the horizontal height of the lower bearing block positioning side block 3a. The clamping protrusion 6 is inserted into the clamping groove 6a for positioning, and then the positioning cushion block 5 and the lower bearing block positioning side block 3a are screwed and fixed by screws, with high installation accuracy. After the radial holes of the lower bearing block 100 are machined, the chip removal groove 8 can facilitate the discharge of the machined debris, facilitating the cleaning by the staff.

[0044] The specific embodiments described herein are merely illustrative of the spirit of the present utility model. Those skilled in the technical field to which the present utility model pertains can make various modifications or supplements to the described specific embodiments or use similar methods for substitution, but will not deviate from the spirit of the present utility model.

[0045] Although terms such as fixture base plate 1, positioning mandrel 2, radial hole machining positioning structure 3, lower bearing block positioning side block 3a, radial hole machining area 3b, lower bearing block downward pressing and fixing structure 4, lower pressing plate 4a, cylinder 4b, cylinder heightening block 4c, positioning cushion block 5, clamping protrusion 6, fixture backrest 7, lower bearing block side step abutting portion 7a, chip removal groove 8, lower bearing block 100, lower bearing block central bearing hole 200, support leg 300 are used more frequently in this text, the possibility of using other terms is not excluded. These terms are only used to more conveniently describe and explain the essence of the present utility model, and interpreting them as any kind of additional restriction is contrary to the spirit of the present utility model.

Claims

1. A lower bearing seat hole processing fixture, comprising a fixture base plate (1), characterized in that: A positioning spindle (2) for positioning the central bearing hole (200) of the lower bearing seat is provided at the center point of the fixture base plate (1); a plurality of radial hole processing positioning structures (3) and a lower bearing seat pressing and fixing structure (4) are provided on the fixture base plate (1) and are distributed in a circular array along the center point of the fixture base plate (1); the inner side of the radial hole processing positioning structure (3) abuts against the outer side of the support leg (300) of the lower bearing seat (100); when the lower bearing seat pressing and fixing structure (4) rotates to above the support leg (300) of the lower bearing seat (100), the lower bearing seat pressing and fixing structure (4) can move downward to press the support leg (300) of the lower bearing seat (100).

2. The lower bearing seat hole machining fixture according to claim 1, characterized in that: The radial hole processing positioning structure (3) comprises a lower bearing seat positioning side block (3a) arranged on the fixture bottom plate (1), the number of the lower bearing seat positioning side blocks (3a) is three, and the angle between the extended intersection points of the center lines of two adjacent lower bearing seat positioning side blocks (3a) is 120°.

3. The lower bearing seat hole machining fixture according to claim 2, characterized in that: The lower bearing seat positioning side block (3a) has a radial hole processing area (3b) which is arranged transversely and passes through the lower bearing seat positioning side block (3a).

4. The lower bearing seat hole machining fixture according to claim 3, characterized in that: The inner arc surface of the lower bearing seat positioning side block (3a) abuts against the outer arc surface of the support foot (300) of the lower bearing seat (100).

5. The lower bearing seat hole machining fixture according to claim 4, characterized in that: A positioning cushion block (5) is provided at the bottom of the lower bearing seat positioning side block (3a), and the positioning cushion block (5) is connected to the lower bearing seat positioning side block (3a) via a snap-fit ​​connection structure.

6. The lower bearing seat hole machining fixture according to claim 5, characterized in that: The snap-fit ​​connection structure comprises a snap-fit ​​protrusion (6) arranged at the bottom of the lower bearing seat positioning side block (3a), a snap-fit ​​groove (6a) matching the shape of the snap-fit ​​protrusion (6) is arranged in the positioning pad (5), and a plurality of screws are installed at the fitting surface between the positioning pad (5) and the lower bearing seat positioning side block (3a).

7. The lower bearing seat hole machining fixture according to any one of claims 2 to 6, characterized in that: The lower bearing seat pressing and fixing structure (4) comprises a lower pressing plate (4a) arranged on the fixture bottom plate (1), the number of the lower pressing plates (4a) is three, a cylinder (4b) is arranged below the lower pressing plate (4a), the cylinder (4b) and the lower pressing plate (4a) are connected by a piston rod, when the lower pressing plate (4a) is rotated to above the support leg (300) of the lower bearing seat (100), the lower pressing plate (4a) can move downward to press the top step surface of the support leg (300) of the lower bearing seat (100).

8. The lower bearing seat hole machining fixture according to claim 7, characterized in that: Three cylinder padding blocks (4c) are provided on the fixture bottom plate (1), one end of the cylinder padding block (4c) is fixed to the fixture bottom plate (1), and the other end is fixed to the cylinder (4b).

9. The lower bearing seat hole machining fixture according to claim 5 or 6, characterized in that: A clamp backer (7) is mounted on one of the positioning pads (5), and the clamp backer (7) has a step abutment portion (7a) on the side of the lower bearing seat.

10. The lower bearing seat hole machining fixture according to claim 9, characterized in that: A chip removal groove (8) is formed between the clamp backing (7) and the lower bearing seat positioning side block (3a), and the clamp backing (7) and the positioning cushion block (5) are fixed by screws.

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