Balance shaft housing U-bolt positioning fixture

Abstract

This utility model relates to balance shaft housing processing technology, and in particular provides a U-bolt positioning fixture for balance shaft housings. The fixture includes a worktable and a fixed base. The worktable has a sliding groove, and the fixed base consists of a straight base and a fixing plate. First sliders at both ends of the lower surface of the base are slidably connected to the sliding groove. A first threaded hole is located in the center of the fixing plate, through which a first screw is threadedly connected. A stop block and an adjusting bolt are mounted on the screw. Second threaded holes are symmetrically located on the left and right sides of the upper end of the fixing plate, connecting to second screws. A pad and an adjusting knob are mounted on the end of each screw. A support base is located in front of the worktable, with supporting plates on both sides of the support base. This utility model, through the cooperation of the screw and the pad, can achieve horizontal and vertical positioning and fixing. The stop block has an installation groove, allowing for quick fixing without disassembling the adjusting bolt, greatly shortening installation time and improving processing efficiency.

Description

Technical Field

[0001] This utility model relates to the field of balance shaft housing processing technology, and in particular to a U-bolt positioning fixture for balance shaft housing. Background Technology

[0002] Before installing the U-bolts and balance shaft housing, the connecting surfaces of the balance shaft housing and the U-bolt fixing plate need to be treated to ensure the flatness of the connection. This is typically done by milling to remove uneven parts of the balance shaft housing mounting surface, such as casting burrs and oxide scale. If these uneven areas are not treated, the U-bolts and balance shaft housing will not fit tightly together. During equipment operation, the gap at the connection point will cause vibration and impact, affecting the normal operation of the balance shaft and potentially leading to problems such as loosening or breaking of the U-bolts and damage to the balance shaft housing. Current technology typically uses automated CNC machine tools to mill the balance shaft housing, thus requiring a positioning base. By fixing limit blocks in various directions on the base, support and fixation at each fulcrum are achieved for automatic milling. The limit blocks are usually fixed with bolts to ensure accurate and stable positioning, but tightening the bolts is usually time-consuming and labor-intensive.

[0003] Based on this, this utility model designs a U-bolt positioning fixture for balance shaft housing that can quickly and accurately position the hole to ensure accurate drilling position and improve processing efficiency. Utility Model Content

[0004] The purpose of this invention is to provide a U-bolt positioning fixture for a balance shaft housing, thereby solving the problems in the prior art.

[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution: A U-bolt positioning fixture for a balance shaft housing includes a worktable with a fixed seat mounted on it. A sliding groove is formed on the worktable. The fixed seat includes a bottom straight base and a fixing plate vertically mounted on the straight base. First sliders are provided at both ends of the lower surface of the straight base, and these sliders are slidably connected to the sliding groove. A first threaded hole is formed in the center of the fixing plate, through which a first screw is threadedly connected. A stop is mounted on the first screw, and a mounting groove for the first screw to pass through is formed on the stop. The stop is fixed to the first screw by an adjusting bolt. Second threaded holes are symmetrically formed on the left and right sides of the upper end of the fixing plate, corresponding to the first screw. These second threaded holes are threadedly connected to second screws. A pad is threadedly mounted at the end of the second screw, and a second adjusting knob is mounted at the end of the second screw. A support base is mounted in front of the fixed seat, and symmetrical vertical support plates are provided on both sides of the support base.

[0006] Limiting blocks are fixed on the workbench by fixing bolts. The limiting blocks can be installed around the fixing bolts to adjust the direction. There are several limiting blocks, located on the front side of the support base and the back side of the fixed base, respectively abutting against the back of the support plate and the front end of the fixed plate.

[0007] The back of the mounting base is vertically provided with two reinforcing plates, which are fixed on the straight base. The two reinforcing plates are located inside the two second threaded holes respectively. A square hole is opened at the upper end of the reinforcing plate, and a reinforcing rod is horizontally inserted into the square hole.

[0008] The two ends of the reinforcing rod are fixed with connecting lugs, and through holes are opened on the connecting lugs. The through holes are coaxial with the second threaded hole.

[0009] The lower surface of the support base is fixed with second threaded holes at both ends, and the second threaded holes are slidably connected to the slide groove.

[0010] The bottom thickness of the support base is the same as that of the straight base.

[0011] The stop block is long and narrow, with the mounting groove opened along its length.

[0012] This utility model has the following beneficial effects: 1. This utility model can achieve horizontal and vertical positioning and fixing by using a screw and a pad.

[0013] 2. The stop block has a mounting groove, which can be quickly fixed without removing the adjusting bolts, greatly shortening the installation time and improving the processing efficiency. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a front view of the present invention. Figure 2 This is a schematic diagram of the overall structure of this utility model; Figure 3 This is a schematic diagram of the back structure of the fixing seat of this utility model; Figure 4 This is a schematic diagram of the installation method of the stop block of this utility model; Figure 5 This is a schematic diagram of the rear mounting of this utility model.

[0016] The attached diagram lists the components represented by each number as follows: 1. Workbench; 2. Slide groove; 3. Support base; 4. Fixed base; 5. Limit block; 6. Fixing bolt; 7. Support plate; 8. First screw; 9. Stop block; 10. Adjusting bolt; 11. Mounting groove; 12. First adjusting knob; 13. Second adjusting knob; 14. Pad; 15. Second screw; 16. First threaded hole; 17. Reinforcing plate; 18. First slider; 19. Second threaded hole; 20. Reinforcing rod; 21. Connecting ear; 22. Through hole; 23. Balance shaft housing; 24. I-shaped base; 25. Fixed plate; 26. Second slider. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. It should be understood that the terms "upper", "middle", "outer", "inner", "lower" etc., which indicate orientation or positional relationship, are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, and therefore should not be construed as a limitation of the present utility model.

[0018] The attached figures illustrate specific embodiments of this utility model, such as... Figures 1-5 As shown, this utility model is a U-shaped bolt positioning fixture for a balance shaft housing, including a worktable 1, which is installed inside a CNC machine tool. The worktable 1 typically has a sliding groove 2. The dimensions of a first slider 18 and a second slider 26 are designed according to the sliding groove 2. The first slider 18 is installed on the lower surface of the straight base 24 of the fixed seat 4, and the second slider 26 is installed on the lower surface of the support seat 3, which is located directly in front of the fixed seat 4. A bolt is vertically fixed on the worktable 1, and a limit block 5 passes through the bolt. There are at least four limit blocks 5, located on the back side of the fixed seat 4 and the front side of the support seat 3, respectively. The limit blocks 5 can rotate around the bolt to adjust their direction, so that they abut against the front end face of the fixed plate 25 and the back side of the support plate 7, respectively, and are fixed by fixing bolts 6 to prevent the limit blocks 5 from moving, thereby restricting the movement of the fixed seat 4 and the support seat 3, and used to determine the approximate position of the balance shaft housing 23 on the CNC machine tool.

[0019] The mounting base 4 includes a straight base 24 and a fixing plate 25 vertically fixed to the straight base 24. The thickness of the fixing plate 25 is the same as that of the support base 3 to ensure that the support surface is flush. In use, the support base 3 is slid to a suitable distance in front of the mounting base 4 according to actual needs. The front and rear edges of the bottom of the balance shaft mounting hole on the balance shaft housing 23 need to be placed on the support base 3 and the straight base 24 respectively, and the back side of the balance shaft housing 23 is in contact with the fixing plate 25. The support base 3 has symmetrical vertical support plates 7 on both sides, located on the irregular surface of the saddle part of the balance shaft housing 23.

[0020] The first screw 8 is threaded through the first threaded hole 16 in the center of the fixing plate 25. The mounting groove 11 of the stop block 9 is aligned with the first screw 8 and passed through it. The first screw 8 passes through the balance shaft mounting hole. The stop block 9 is fixed by the adjusting bolt 10, so that the stop block 9 and the fixing plate 25 clamp the balance shaft housing 23. During disassembly, the first screw 8 can be moved back and forth axially by rotating the first adjusting knob 12. Then the stop block 9 can be pulled out without removing the adjusting bolt 10, thus achieving a fine adjustment. The length of the stop block 9 is greater than the diameter of the mounting hole 23 of the balance shaft housing, and its function is to fix the bottom of the balance shaft housing 23.

[0021] The second threaded holes 19 on the left and right sides of the upper end of the fixing plate 25 are threadedly connected to the second screws 15. Rotating the second adjusting knob 13 causes the second screws 15 to move back and forth axially, thereby accommodating balance shaft housings 23 of different widths. The pads 14 at the ends of the second screws 15 serve a protective function, preventing the screws 15 from scratching the surface of the balance shaft housing 23. By replacing the adjusting pads 14 of different sizes, balance shaft housings of different heights can be accommodated. The function of the second threaded holes 19 is to fix the saddle part of the balance shaft housing 23.

[0022] To further increase the stability of the mounting base 4, two reinforcing plates 17 are vertically installed on the back side of the mounting base 4 and fixed to the straight base 24. The two reinforcing plates 17 are located inside the two second threaded holes 19, respectively, to enhance the connection strength between the mounting plate 25 and the straight base 24. A reinforcing rod 20 is horizontally inserted into the square hole at the upper end of the reinforcing plate 17. The through holes 22 on the connecting lugs 21 at both ends of the reinforcing rod 20 are coaxial with the second threaded holes 19, which can further improve the stability of the second screw 15 and make it less prone to deformation when subjected to greater pressure. In use, with the balance shaft mounting hole of the balance shaft housing 23 facing forward and the saddle facing upward, place the balance shaft housing 23 to be processed as follows: Figure 1 Place the blocks as shown, insert the stop block 9, rotate the second adjustment knob to clamp the stop block 9, turn on the CNC machine tool, and mill the upper surface of the saddle.

[0023] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the present invention to specific implementation methods.

Claims

1. A U-bolt positioning fixture for a balance shaft housing, comprising a worktable (1) and a fixed seat (4) mounted on the worktable (1), characterized in that: A slide groove (2) is provided on the workbench (1). The fixed base (4) includes a bottom straight base (24) and a fixed plate (25) vertically installed on the straight base (24). The two ends of the lower surface of the straight base (24) are provided with first sliders (18), and the first sliders (18) are slidably connected to the slide groove (2). A first threaded hole (16) is provided in the center of the fixed plate (25). The fixed plate (25) is threadedly connected to the first screw (8) through the first threaded hole (16). A stop (9) is installed on the first screw (8). A stop (9) is provided on the stop (9) for the first screw to pass through. The mounting groove (11) of the rod (8) and the stop block (9) are fixed on the first screw (8) by adjusting bolts (10); the left and right sides of the upper end of the fixing plate (25) are symmetrically opened with the first screw (8) and the second threaded hole (19) is threadedly connected to the second screw (15). The end of the second screw (15) is threaded with a pad (14) and the end of the second screw (15) is installed with a second adjusting knob (13); a support seat (3) is installed in front of the fixing seat (4) and a support plate (7) is symmetrically and vertically arranged on both sides of the support seat (3).

2. The U-bolt positioning fixture for the balance shaft housing according to claim 1, characterized in that: The limiting block (5) is fixed on the workbench (1) by fixing bolts (6). The limiting block (5) can be installed around the fixing bolts (6) to adjust the direction. There are several limiting blocks (5), which are located on the front side of the support base (3) and the back side of the fixed base (4), respectively, and abut against the back of the support plate (7) and the front end of the fixed plate (25).

3. The U-bolt positioning fixture for the balance shaft housing according to claim 1, characterized in that: The back side of the fixed base (4) is provided with two reinforcing plates (17) vertically. The reinforcing plates (17) are fixed on the straight base (24). The two reinforcing plates (17) are located inside the two second threaded holes (19) respectively. A square hole is opened at the upper end of the reinforcing plate (17), and a reinforcing rod (20) is horizontally inserted into the square hole.

4. The U-bolt positioning fixture for the balance shaft housing according to claim 3, characterized in that: The two ends of the reinforcing rod (20) are fixedly connected with lugs (21), and through holes (22) are opened on the lugs (21). The through holes (22) are coaxial with the second threaded hole (19).

5. The U-bolt positioning fixture for the balance shaft housing according to claim 1, characterized in that: The lower surface of the support base (3) is fixed with two ends of a second slider (26), and the second slider (26) is slidably connected to the groove (2).

6. The U-bolt positioning fixture for the balance shaft housing according to claim 1, characterized in that: The bottom thickness of the support base (3) is the same as that of the straight base (24).

7. The U-bolt positioning fixture for the balance shaft housing according to claim 1, characterized in that: The stop block (9) is long and narrow, and the mounting groove (11) is opened along the length direction.

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