Boring machine special for fuel injection pump support

Abstract

The utility model discloses a kind of boring machine special for oil injection pump support, including boring machine "U type" base and the workpiece fixing seat connected with boring machine "U type" base one end, boring machine "U type" base upper is equipped with the sliding slot plate matched with sliding rail;The upper fixedly connected of sliding slot plate has connecting seat, and main shaft box and motor support connected on connecting seat, motor support is fixedly provided with motor in it;The outside of main shaft box is equipped with main shaft and auxiliary shaft fixedly connected on main shaft, the output end of the rotating shaft of motor is inserted into main shaft box and is fixedly connected with main shaft;The boring cutter of one end of auxiliary shaft is equipped with, boring cutter is overall conical structure;The middle part of auxiliary shaft is equipped with butterfly spring damper, and butterfly spring damper includes multiple butterfly springs and viscoelastic rubber.The boring cutter of the design conical structure, according to cutting thickness gradually carries out hierarchical cutting.Using butterfly spring damper absorbs buffer impact force and auxiliary energy transmission, reduce the vibration of end boring cutter.

Description

Technical Field

[0001] This utility model relates to the technical field of fuel injection pump processing equipment, and in particular to a boring machine for fuel injection pump brackets. Background Technology

[0002] The fuel injection pump bracket is a support structure connecting the fuel injection pump to the engine block, typically made of cast or welded metal. As the "heart" of the diesel engine, the fuel injection pump requires precise control of fuel injection timing and quantity, while the bracket ensures its stable installation, preventing displacement or damage caused by vibration. After casting, the fuel injection pump bracket needs precise positioning when connecting the fuel injection pump to the engine block, and must provide stable support while bearing complex loads. The arc-shaped guide groove of the fuel injection pump bracket needs a contour accuracy of ±0.05mm.

[0003] In existing technologies, ordinary boring machines struggle to achieve such high precision requirements. Furthermore, the boring bar, being a cylindrical structure, experiences significant cutting pressure at its head when cutting thicker materials. Over time, this leads to a rapid decline in the boring bar's lifespan and a rapid increase in temperature. Moreover, the length of the spindle and counterspindle causes vibration and chatter at the end of the boring bar, resulting in a substantial decrease in cutting accuracy. Consequently, the required precision is not met, surface roughness deteriorates, and tool marks or chip scratches appear. Therefore, a fuel injection pump bracket is needed to improve machining accuracy while simultaneously preventing the precision degradation caused by boring bar vibration and chatter. Utility Model Content

[0004] This utility model addresses the technical problem that vibration and chatter of the boring tool during the machining of fuel injection pump brackets on a boring machine significantly reduces cutting accuracy, resulting in tool marks or chip scratches. It provides a dedicated boring machine for fuel injection pump brackets, comprising a U-shaped base and a workpiece fixing seat connected to one end of the U-shaped base. The top opening of the U-shaped base has two parallel slide rails, and a sliding groove plate matching the slide rails is provided above the U-shaped base.

[0005] A connecting seat is fixedly connected above the slide plate, and a spindle box and a motor bracket are connected to the connecting seat. A motor is fixedly installed inside the motor bracket.

[0006] The outer side of the spindle box is provided with a main shaft and a secondary shaft fixedly connected to the main shaft. The output end of the motor shaft extends into the spindle box and is fixedly connected to the main shaft.

[0007] One end of the sub-shaft is provided with a boring tool, which is integrally tapered and fixedly connected to the sub-shaft;

[0008] The secondary shaft is provided with a butterfly spring damper in the middle. The butterfly spring damper includes multiple butterfly springs and viscoelastic rubber. The multiple butterfly springs are fixedly connected to the middle of the secondary shaft in a stacked manner. The viscoelastic rubber is uniformly filled between the concave surfaces of two adjacent butterfly springs.

[0009] Preferably, in the above technical solution, the main shaft has a hollow structure, and the hollow interior is filled with damping particles.

[0010] Preferably, in the above technical solution, a support base is connected above the workpiece fixing seat, the top of the workpiece fixing seat is provided with an inverted conical protrusion, and the bottom of the support base is provided with an inverted conical groove that matches the inverted conical protrusion, so as to ensure that the support base and the workpiece fixing seat are slidably connected.

[0011] Preferably, in the above technical solution, at least two bolt rods are fixedly connected to the top of the support base, and both bolt rods are perpendicular to the top surface of the support base.

[0012] Preferably, in the above technical solution, the support base is provided with a clamping plate and a bolt that matches the two bolt rods. The clamping plate has two through holes, and the inner diameter of each through hole is larger than the outer diameter of the bolt, so as to ensure that the clamping plate can be fixed above the support base by the bolt.

[0013] Preferably, in the above technical solution, a cross-shaped swivel is fixedly connected above each bolt to ensure that rotating the cross-shaped swivel drives the bolt to rotate simultaneously along the bolt rod.

[0014] Preferably, in the above technical solution, a connecting block is fixedly connected to the bottom of the slide plate, and the interior of the connecting block is provided with a threaded through hole parallel to the slide rail.

[0015] Preferably, in the above technical solution, a low-speed motor and a threaded rod are provided in the center of the "U-shaped" base of the boring machine, and the motor rotation shaft of the low-speed motor is fixedly connected to one end of the threaded rod.

[0016] Preferably, in the above technical solution, the external thread of the threaded rod matches the internal thread of the threaded through hole to ensure that the low-speed motor can drive the slide plate to slide horizontally.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] This invention designs a boring bar with a conical structure. During cutting, the boring bar inserts gradually cut in layers according to the cutting thickness, avoiding stress concentration at the boring bar head, aging of the cutting head, rapid temperature rise, and a decline in cutting accuracy.

[0019] The butterfly spring damper in the middle of the secondary shaft of this utility model consists of a butterfly spring and viscoelastic rubber working together. While maintaining a rigid connection, it uses the butterfly spring to buffer the impact force and assist in energy transfer. The viscoelastic rubber utilizes the dynamic balance between the frictional energy dissipation of its molecular chain segments and the elastic storage to further reduce the vibration and chatter of the end boring tool, thereby improving the cutting accuracy of the boring machine. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of a boring machine for a fuel injection pump bracket according to the present invention;

[0021] Figure 2 This is a top view of the boring tool in a boring machine for a fuel injection pump bracket according to this utility model;

[0022] Figure 3 This is a schematic diagram of the internal structure of the spindle in a boring machine for a fuel injection pump bracket according to this utility model;

[0023] Figure 4 This is a top view of the support base and clamping plate in a boring machine for a fuel injection pump bracket according to this utility model;

[0024] Figure 5 for Figure 1 Enlarged view of the intermediate shaft and the disc spring damper;

[0025] Figure 6 This is a side view showing the positional relationship between the "U-shaped" base of the boring machine and the low-speed motor in a boring machine specifically designed for a fuel injection pump bracket according to this utility model.

[0026] Figure 7 This is a schematic diagram showing the connection relationship between the connecting block and the threaded rod in a boring machine for a fuel injection pump bracket according to this utility model;

[0027] Figure 8 This is a schematic diagram of the structure of the fuel injection pump bracket in a boring machine for fuel injection pump bracket according to the present invention.

[0028] Explanation of key figure labels:

[0029] 1-U-shaped base of boring machine, 1a-slide rail, 2-slide plate, 3-connecting seat, 4-spindle box, 5-motor bracket, 6-motor, 7-spindle, 8-sub-spindle, 9-boring tool, 10-workpiece fixing seat, 11-support seat, 12-low speed motor, 13-oil injection pump bracket, 81-butterfly spring damper, 101-inverted conical protrusion, 111-inverted conical groove, 112-bolt rod, 113-clamping plate, 114-through hole, 115-bolt, 201-connecting block, 202-threaded through hole, 701-damping particle, 811-butterfly spring, 812-viscoelastic rubber, 1151-cross ring, 1201-motor rotating shaft, 1202-threaded rod, 1301-fixed clamping surface, 1302-finished arc surface. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] like Figures 1-8 As shown, this utility model discloses a boring machine specifically for an injection pump bracket, comprising a U-shaped base 1 and a workpiece fixing seat 10 connected to one end of the U-shaped base 1. A support seat 11 is connected above the workpiece fixing seat 10. The top of the workpiece fixing seat 10 has an inverted conical protrusion 101, and the bottom of the support seat 11 has an inverted conical groove 111 that matches the inverted conical protrusion 101, ensuring a sliding connection between the support seat 11 and the workpiece fixing seat 10. The support seat 11 is designed to be slidable, facilitating the adjustment of the relative position of the workpiece on the fixing seat to determine the degree of machining, and then fixing it with bolts or other fastening devices. When machining the same workpiece, other workpieces can be continuously machined by adjusting and fixing them once.

[0032] In this embodiment, the top of the opening of the boring machine's "U-shaped" base 1 is two parallel slide rails 1a. A slide groove plate 2 matching the slide rails 1a is provided above the boring machine's "U-shaped" base 1. A connecting seat 3 is fixedly connected above the slide groove plate 2, as well as a spindle box 4 and a motor bracket 5 connected to the connecting seat 3. A motor 6 is fixedly installed inside the motor bracket 5. The connecting seat 3 has a hollow grid structure, which helps the spindle box 4 and the motor 6 to ventilate and dissipate heat. The main spindle box 4 has a main spindle 7 and a secondary spindle 8 fixedly connected to the main spindle 7 on its outer side. The output end of the motor 6's shaft extends into the main spindle box 4 and is fixedly connected to the main spindle 7. One end of the secondary spindle 8 is provided with a boring tool 9, which is generally tapered and fixedly connected to the secondary spindle 8. The tapered inclination angle of the boring tool 9 should not be too large, so as to facilitate layered and gradual cutting of the fuel injection pump bracket when the cutting thickness is large, and avoid continuous stress concentration at a single cutting head position of the boring tool 9 during cutting operations. A butterfly spring damper 81 is provided in the middle of the secondary spindle 8. The butterfly spring damper 81 includes multiple butterfly springs 811 and viscoelastic rubber 812. The multiple butterfly springs 811 are fixedly connected to the middle of the secondary spindle 8 in a stacked manner. The rigidity of the stacked butterfly springs 811 and the rigidity of the connection to the secondary spindle 8 must meet the overall rigidity requirements to avoid the risk of breakage or detachment in the middle during machining operations. The viscoelastic rubber 812 is uniformly filled between the concave surfaces of two adjacent butterfly springs 811. In actual operation, the viscoelastic rubber 812 is first filled into the gap between the concave surfaces of the two butterfly springs 811, and then rigid welding is performed. When the butterfly spring 811 is axially compressed, the conical disc deforms to a flattened state, storing potential energy; when the bolt loosens or the seal fails, the energy is released to maintain the connection pressure. The butterfly spring 811 has high stiffness and can withstand heavy loads with minimal deformation (short stroke). When stacked, the friction between the discs provides additional damping and dissipates impact energy. The main shaft 7 has a hollow structure, and the hollow interior is filled with damping particles 701. The damping particles 701 absorb vibration energy through particle collision, friction, and internal material dissipation mechanisms. The damping particles 701 can be epoxy granite or steel balls / steel scrap metal particles, etc., as long as they can absorb vibration energy. The butterfly spring damper 81 consists of the butterfly spring 811 and the elastic rubber 812 working together to eliminate and absorb vibration energy in the secondary shaft 8. The damping particles 701 inside the hollow structure of the main spindle 7 can further absorb the vibration energy in the main spindle 7. The two work together to eliminate the vibration energy of the main spindle 7 and the secondary spindle 8 on a larger scale, thus avoiding the problems of vibration and chatter of the boring tool.

[0033] like Figure 1 , 4As shown, at least two bolt rods 112 are fixedly connected to the top of the support base 11, and both bolt rods 112 are perpendicular to the top surface of the support base 11. A clamping plate 113 and bolts 115 matching the two bolt rods 112 are provided above the support base 11. The clamping plate 113 has two through holes 114, the inner diameter of each through hole 114 being larger than the outer diameter of the bolt 115, to ensure that the clamping plate 113 can be fixed above the support base 11 by the bolts 115. A cross-shaped swivel ring 1151 is fixedly connected above each bolt 115 to ensure that rotating the cross-shaped swivel ring 1151 drives the bolt 115 to rotate simultaneously along the bolt rod 112. In use, place the fixing clamping surface 1301 of the fuel injection pump bracket 13 between the support base 11 and the clamping plate 113, and then rotate the cross ring 1151 in sequence until the two bolts 115 are tightened to stabilize and fix the fuel injection pump bracket 13 to be processed. Then, perform the precision machining arc surface 1302 in sequence.

[0034] In this embodiment, as Figure 1 , 6 As shown in Figure 7, a connecting block 201 is fixedly connected to the bottom of the slide plate 2. The connecting block 201 has a threaded through hole 202 parallel to the slide rail 1a inside. A low-speed motor 12 and a threaded rod 1202 are located in the center of the "U-shaped" base 1 of the boring machine. The motor rotation shaft 1201 of the low-speed motor 12 is fixedly connected to one end of the threaded rod 1202. The external thread of the threaded rod 1202 matches the internal thread of the threaded through hole 202 to ensure that the low-speed motor 12 can drive the slide plate 2 to slide horizontally. When the low-speed motor 12 rotates, the motor rotation shaft 1201 drives the threaded rod 1202 to rotate together. At this time, the connecting block 201 sleeved on the outer periphery of the threaded rod 1202 will move slowly with the thread direction. The connecting block 201 will drive the slide plate 2 and the connecting seat 3 fixed on it to move together. By controlling the low-speed motor 12 to move forward and reverse, the horizontal movement of the boring tool 9 can be realized.

[0035] This invention relates to a conical boring bar. During cutting, the inserts gradually cut in layers according to the cutting thickness, avoiding single-area cutting at the boring bar head, which causes stress concentration, aging, and rapid temperature rise, resulting in decreased cutting accuracy. The invention also features a butterfly spring damper in the middle of the counterspindle, consisting of a butterfly spring and viscoelastic rubber. While maintaining a stable rigid connection, the butterfly spring buffers impact forces and assists in energy transfer. The viscoelastic rubber utilizes the dynamic balance between energy dissipation through molecular chain friction and elastic storage to further reduce vibration and chatter at the end of the boring bar. The damping particles within the hollow structure of the main spindle further absorb vibration energy from the spindle, solving the technical problems of insufficient cutting accuracy and tool marks or chip scratches when machining fuel injection pump brackets on boring machines.

[0036] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A boring machine for a fuel injection pump bracket, characterized in that: Includes a boring machine "U-shaped" base (1) and a workpiece fixing seat (10) connected to one end of the boring machine "U-shaped" base (1). The top of the opening of the boring machine "U-shaped" base (1) is two parallel slide rails (1a). A slide groove plate (2) matching the slide rails (1a) is provided above the boring machine "U-shaped" base (1). A connecting seat (3) is fixedly connected above the slide plate (2), and a spindle box (4) and a motor bracket (5) are connected to the connecting seat (3). A motor (6) is fixedly installed inside the motor bracket (5). The main shaft (7) and the auxiliary shaft (8) fixedly connected to the main shaft (7) are provided on the outside of the main shaft box (4). The output end of the rotating shaft of the motor (6) extends into the main shaft box (4) and is fixedly connected to the main shaft (7). One end of the sub-shaft (8) is provided with a boring tool (9), and the boring tool (9) is generally conical and fixedly connected to the sub-shaft (8); The sub-shaft (8) is provided with a butterfly spring damper (81) in the middle. The butterfly spring damper (81) includes multiple butterfly springs (811) and viscoelastic rubber (812). The multiple butterfly springs (811) are fixedly connected to the middle of the sub-shaft (8) in a stacked manner. The viscoelastic rubber (812) is uniformly filled between the concave surfaces of two adjacent butterfly springs (811).

2. The boring machine for the fuel injection pump bracket according to claim 1, characterized in that: The main shaft (7) is a hollow structure, and the hollow interior is filled with damping particles (701).

3. The boring machine for the fuel injection pump bracket according to claim 1, characterized in that: A support seat (11) is connected above the workpiece fixing seat (10). The top of the workpiece fixing seat (10) is provided with an inverted conical protrusion (101), and the bottom of the support seat (11) is provided with an inverted conical groove (111) that matches the inverted conical protrusion (101), so as to ensure that the support seat (11) and the workpiece fixing seat (10) are slidably connected.

4. The boring machine for the fuel injection pump bracket according to claim 3, characterized in that: At least two bolt rods (112) are fixedly connected to the top of the support base (11), and both bolt rods (112) are perpendicular to the top surface of the support base (11).

5. The boring machine for the fuel injection pump bracket according to claim 4, characterized in that: The support base (11) is provided with a clamp (113) and a bolt (115) that matches the two bolt rods (112). The clamp (113) has two through holes (114), and the inner diameter of each through hole (114) is larger than the outer diameter of the bolt (115) to ensure that the clamp (113) can be fixed above the support base (11) by the bolt (115).

6. The boring machine for the fuel injection pump bracket according to claim 5, characterized in that: Each bolt (115) is fixedly connected to a cross ring (1151) above it to ensure that when the cross ring (1151) is rotated, the bolt (115) is driven to rotate simultaneously along the bolt rod (112).

7. The boring machine for the fuel injection pump bracket according to claim 1, characterized in that: A connecting block (201) is fixedly connected to the bottom of the slide plate (2), and the interior of the connecting block (201) is provided with a threaded through hole (202) parallel to the slide rail (1a).

8. The boring machine for the fuel injection pump bracket according to claim 7, characterized in that: The boring machine's "U-shaped" base (1) has a low-speed motor (12) and a threaded rod (1202) in the center. The motor rotation shaft (1201) of the low-speed motor (12) is fixedly connected to one end of the threaded rod (1202).

9. The boring machine for the fuel injection pump bracket according to claim 8, characterized in that: The external thread of the threaded rod (1202) matches the internal thread of the threaded through hole (202) to ensure that the low-speed motor (12) can drive the slide plate (2) to slide horizontally.

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