Concrete delivery pump cylinder machining positioning fixture

Abstract

This utility model relates to a positioning fixture for machining the cylinder body of a concrete conveying pump, including a base, a cylinder body positioning seat, supporting side seats, and a rotating mechanism. Two supporting side seats are provided on the top of the base, and the cylinder body positioning seat is installed between the two supporting side seats via the rotating mechanism. The rotating mechanism is used to rotate the cylinder body positioning seat to reduce friction. It is equipped with lubricating components to lubricate the ball bearings, further reducing the friction during cylinder body positioning seat rotation. When oil replenishment is required, lubricating oil is introduced into the oil chamber through an oil replenishment pipe. The oil chamber contains annular absorbent cotton to absorb the lubricating oil. The oil falls into the annular groove through the holes in the filter plate. Alternatively, pulling the pull block can move the pull rod upwards, causing the filter plate to rise and squeeze the absorbent cotton, expelling the lubricating oil stored within it. This oil flows into the annular groove through the holes in the filter plate. A drainage groove is also provided at the bottom of the annular groove. A transparent strip is provided on one side of the oil chamber for easy observation of the internal condition of the oil chamber.

Description

Technical Field

[0001] This utility model relates to the technical field of concrete pump cylinder body processing equipment, specifically a positioning fixture for processing concrete pump cylinder bodies. Background Technology

[0002] The current concrete pump cylinder machining and positioning fixtures used in the industry mostly adopt a rotating structure with direct sliding or simple bushing cooperation between the cylinder positioning seat and the support side seat. During rotation, the contact part between the cylinder positioning seat and the support side seat is prone to generating large resistance due to metal friction. Especially under the action of the cylinder's own weight, jamming and abnormal noise are likely to occur during rotation.

[0003] For example, the authorized patent document with application number CN202222636503.0 discloses a cylinder clamp, which belongs to the field of mechanical technology. A cylinder clamp includes a rotating frame that rotates along a first axis; at least two fixed plates, the fixed plates are fixed on the rotating frame, and each fixed plate is fixed with at least two positioning pins and an expansion tube. The positioning pins are arranged around the expansion tube. In the above structure, when the clamp rotates, there is a lack of lubrication, which can easily lead to jamming, uneven force on the honing head, and scratches on the inner wall. That is, during the rotation process, the contact part between the cylinder positioning seat and the support side seat is prone to generating large resistance due to metal friction. Therefore, we need to provide a positioning clamp for machining the cylinder of a concrete pump. Utility Model Content

[0004] The purpose of this utility model is to provide a positioning fixture for machining the cylinder body of a concrete pump. The rotating mechanism, through the sliding cooperation between the column and the supporting side seat, combined with the rolling support of the slider in the annular groove, transforms traditional sliding friction into mixed friction. Combined with the drag reduction effect of the lubricating components, it avoids jamming and abnormal noise. The operator can easily adjust the angle manually. Lubricating oil can be directly added to the oil chamber through the oil replenishment pipe without disassembling the parts. The absorbent cotton can store the lubricating oil and release it slowly. Compared with the traditional manual disassembly and lubrication method, it reduces downtime and solves the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a positioning fixture for machining the cylinder body of a concrete conveying pump, comprising:

[0006] The base includes a cylinder positioning seat, support side seats, and a rotating mechanism. The top of the base is provided with two support side seats, and the cylinder positioning seat is installed between the two support side seats through a rotating mechanism. The rotating mechanism is used to rotate the cylinder positioning seat to reduce friction.

[0007] The rotating mechanism includes a column, an annular groove, a slider, and a lubricant. One end of the column is fixed to one side of the cylinder positioning seat and is slidably installed inside the support side seat. Multiple sliders are distributed in an annular pattern on one side of the cylinder positioning seat. An annular groove for sliding multiple sliders is provided on one side of the support side seat. The lubricant is located at the top of the support side seat and is used to make the slider slide in the annular groove to reduce friction.

[0008] Preferably, the lubricating component includes an oil cavity, an oil replenishment pipe, and absorbent cotton. The oil cavity is located inside the support side seat and communicates with the annular groove. An oil replenishment pipe is connected to one side of the oil cavity, and absorbent cotton is provided inside.

[0009] Preferably, the oil cavity is provided with an extrusion component, which includes a filter plate, a positioning ring, and a pull rod. The outer edge of the positioning ring is fixed inside the oil cavity, and the pull rod is movably sleeved inside. The lower end of the pull rod is fixedly installed with a filter plate, and the absorbent cotton is annular and located between the filter plate and the positioning ring.

[0010] Preferably, a pull block is fixedly installed on the top of the pull rod, and a cap is threadedly installed on the top of the oil replenishment pipe.

[0011] Preferably, the slider includes reinforcing blocks and ball bearings, with multiple reinforcing blocks arranged in a ring on the side of the rod positioning seat, and ball bearings rotatably mounted on the surface of the reinforcing blocks.

[0012] Preferably, the annular groove is provided with a limiting groove for the rotation of the ball bearing.

[0013] Preferably, a cotton layer is fixedly installed on the bottom of the inner wall of the cylinder positioning seat, and both the cotton layer and the cylinder positioning seat are provided with positioning holes for fixing the cylinder.

[0014] Preferably, one side of the support seat is provided with a driver for rotating the column.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] This utility model uses a rotating mechanism that combines the sliding fit between the column and the support side seat with the rolling support of the slider in the annular groove to transform traditional sliding friction into mixed friction. Combined with the drag reduction effect of the lubricating components, it avoids jamming and abnormal noise. The operator can easily adjust the angle manually. Lubricating oil can be directly added to the oil chamber through the oil replenishment pipe without disassembling the parts. The absorbent cotton can store the lubricating oil and release it slowly. Compared with the traditional manual disassembly and lubrication method, it reduces downtime. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0018] Figure 2 This is a three-dimensional sectional view of the support side seat of this utility model;

[0019] Figure 3 The structure of this utility model Figure 2 Enlarged view of a portion of point A in the middle;

[0020] Figure 4 This is an exploded perspective view of the rotating mechanism of this utility model;

[0021] Figure 5 This is a perspective view of the extruded part of this utility model.

[0022] In the diagram: 1. Base; 2. Cylinder positioning seat; 3. Support side seat; 4. Rotating mechanism; 41. Column; 42. Annular groove; 43. Slider; 431. Reinforcing block; 432. Ball bearing; 44. Lubricating component; 441. Oil chamber; 442. Oil replenishment pipe; 443. Absorbent cotton; 5. Extrusion component; 51. Filter plate; 52. Positioning ring; 53. Pull rod; 6. Pull block; 7. Cap; 8. Limiting groove; 9. Cotton layer; 10. Positioning hole. Detailed Implementation

[0023] 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.

[0024] Please see Figure 1-5 This utility model provides a technical solution: a positioning fixture for machining the cylinder body of a concrete conveying pump, comprising:

[0025] The base 1, cylinder positioning seat 2, support side seat 3 and rotating mechanism 4 are provided. The top of the base 1 is provided with two support side seats 3. The cylinder positioning seat 2 is installed between the two support side seats 3 through the rotating mechanism 4. The rotating mechanism 4 is used to rotate the cylinder positioning seat 2 to reduce friction.

[0026] The rotating mechanism 4 includes a column 41, an annular groove 42, a slider 43, and a lubricant 44. One end of the column 41 is fixed to one side of the cylinder positioning seat 2, and the inside is slidably installed in the support side seat 3. A plurality of sliders 43 are distributed in an annular pattern on one side of the cylinder positioning seat 2. An annular groove 42 for sliding of the plurality of sliders 43 is provided on one side of the support side seat 3. The lubricant 44 is located on the top of the support side seat 3 and is used to make the sliders 43 slide in the annular groove 42 to reduce friction.

[0027] Specifically, the rotating mechanism 4, through the sliding engagement of the column 41 and the support side seat 3, combined with the rolling support of the slider 43 in the annular groove 42, transforms traditional sliding friction into mixed friction. Combined with the drag reduction effect of the lubricating component 44, it avoids jamming and abnormal noise. The operator can easily adjust the angle manually. Lubricating oil can be directly added to the oil chamber 441 through the oil replenishment pipe 442 without disassembling the parts. The absorbent cotton 443 can store lubricating oil and release it slowly. Compared with the traditional manual disassembly and lubrication method, it reduces downtime. The continuous and stable lubrication makes the rotation process smoother. Combined with the limiting effect of the slider 43 and the annular groove 42, it avoids problems such as honing roundness error and hole position offset caused by unstable rotation.

[0028] The lubricating component 44 includes an oil cavity 441, an oil supply pipe 442, and an absorbent cotton 443. The oil cavity 441 is located in the support side seat 3 and is connected to the annular groove 42. The oil cavity 441 is connected to the oil supply pipe 442 on one side and is equipped with absorbent cotton 443 inside.

[0029] Furthermore, the oil supply pipe 442 is made of brass. One end of the oil supply pipe 442 is connected to the side wall of the oil cavity 441, and the other end extends upward and passes through the top of the support side seat 3. The absorbent cotton 443 is a high-density polyurethane sponge with a density of 30-40 kg / m³. 3 The absorbent cotton 443 is annularly sleeved on the surface of the pull rod 53. The inner hole of the absorbent cotton 443 is fitted with the inner wall of the oil cavity 441 with a clearance of 0.5-1mm. After the lubricating oil is injected into the oil cavity 441 through the oil replenishment pipe 442, it is absorbed and stored by the absorbent cotton 443, and then slowly seeps into the annular groove 42 through the inner hole of the filter plate 51 to achieve continuous lubrication of the slider 43. The brass oil replenishment pipe 442 has strong corrosion resistance, avoiding pipeline blockage caused by lubricating oil contamination. The oil storage capacity of the high-density absorbent cotton 443 is 8-10 times its own weight, solving the problems of rapid oil loss and unsustainable lubrication in traditional lubrication methods.

[0030] The oil cavity 441 is provided with an extrusion component 5, which includes a filter plate 51, a positioning ring 52 and a pull rod 53. The outer edge of the positioning ring 52 is fixed in the oil cavity 441, and the pull rod 53 is movably sleeved inside. The filter plate 51 is fixedly installed at the lower end of the pull rod 53. The absorbent cotton 443 is annular and located between the filter plate 51 and the positioning ring 52.

[0031] It is worth noting that the positioning ring 52 is a 45# steel ring with a thickness of 5-8mm. Its outer diameter is interference-fitted with the inner diameter of the oil cavity 441, and the mating surface is coated with anaerobic adhesive for fixation. The inner diameter of the positioning ring 52 is 0.2-0.3mm larger than the outer diameter of the pull rod 53. The pull rod 53 is made of stainless steel with a diameter of 6-10mm. The lower end of the pull rod 53 is connected to the center of the filter plate 51, and the top of the pull rod 53 is welded to the pull block 6. The pull block 6 is a circular plastic part with anti-slip texture on the surface. The filter plate 51 is a stainless steel perforated plate with a thickness of 3-5mm. Its outer diameter is larger than that of the oil cavity 441. The inner diameter is 1-2mm smaller, and filter holes with a diameter of 1-2mm are evenly opened on the surface of the filter plate 51. When the pull block 6 is pulled to move the pull rod 53 upward, the filter plate 51 squeezes the absorbent cotton 443 upward, squeezing out the lubricating oil stored in the absorbent cotton 443. After the lubricating oil passes through the filter holes of the filter plate 51 to filter impurities, it flows into the annular groove 42 through the guide hole to achieve rapid oil replenishment. The filtering effect of the filter plate 51 prevents impurities such as iron filings from entering the annular groove 42 and causing the slider 43 to jam. This solves the problem of oil impurities affecting the lubrication effect during traditional oil replenishment. At the same time, the anti-slip pull block 6 makes operation more labor-saving.

[0032] A pull block 6 is fixedly installed on the top of the pull rod 53, and a cap 7 is threadedly installed on the top of the oil supply pipe 442;

[0033] It should be noted that the cap 7 at the top of the oil replenishment tube 442 is made of plastic. The inner wall has an internal thread that matches the outer circumference of the oil replenishment tube 442. The bottom of the cap 7 has a rubber sealing ring with a thickness of 2-3mm and an inner diameter that is the same as the inner diameter of the oil replenishment tube 442. The rubber sealing ring can ensure that there is no lubricating oil leakage when the cap 7 is sealed, thus solving the problem of lubrication failure caused by contamination of the oil cavity 441.

[0034] The slider 43 includes a reinforcing block 431 and a ball bearing 432. Multiple reinforcing blocks 431 are distributed in a ring on the side of the rod positioning seat, and the ball bearing 432 is rotatably mounted on the surface of the reinforcing block 431.

[0035] Specifically, the reinforcing block 431 is made of 40Cr steel and is welded to the side of the cylinder positioning seat 2. A ball bearing 432 mounting groove is provided on the side of the reinforcing block 431 away from the cylinder positioning seat 2. The ball bearing 432 is a G10 grade precision bearing steel ball bearing 432 with a diameter of 8-12mm. The ball bearing 432 and the mounting groove are clearance-fitted with each other, with a clearance of 0.05-0.1mm. The limiting groove 8 inside the annular groove 42 is an arc-shaped groove, and the width of the limiting groove 8 is 0.2-0.3mm larger than the diameter of the ball bearing 432. When the ball bearing 432 rolls within the limiting groove 8, the limiting groove 8 can limit the radial offset of the ball bearing 432 to no more than 0.5mm. The 40Cr steel reinforcing block 431 is heat-treated to a hardness of HRC28-32, ensuring support strength and solving the problem of easy wear and jamming of the traditional slider 43.

[0036] A limiting groove 8 for the rotation of the ball 432 is provided in the annular groove 42;

[0037] The column 41 is fitted with a high-strength deep groove ball bearing at the joint with the support side seat 3. The bearing model is 6204-6206. The inner ring of the bearing is interference-fitted with the column 41, and the outer ring is interference-fitted with the inner hole of the support side seat 3. Dust covers are provided on both sides of the bearing. The deep groove ball bearing converts the sliding friction between the column 41 and the support side seat 3 into rolling friction.

[0038] A cotton layer 9 is fixedly installed on the bottom of the inner wall of the cylinder positioning seat 2. Both the cotton layer 9 and the cylinder positioning seat 2 are provided with positioning holes 10 for fixing the cylinder.

[0039] Specifically, the cotton layer 9 at the bottom of the inner wall of the cylinder positioning seat 2 is made of nitrile rubber with a thickness of 5-8mm. The cotton layer 9 is bonded and fixed to the inner wall of the cylinder positioning seat 2 with epoxy resin. The positioning hole 10 on the surface of the cotton layer 9 is coaxial with the positioning hole 10 on the inner wall of the cylinder positioning seat 2. The diameter of the positioning hole 10 is 0.5-1mm larger than the diameter of the cylinder fixing bolt. A transparent strip is provided on the side of the support side seat 3 near the oil cavity 441. The transparent strip is made of acrylic with a thickness of 3-5mm. It is fixed to the mounting groove of the support side seat 3 with sealant. The length of the transparent strip is consistent with the height of the oil cavity 441. The nitrile rubber cotton layer 9 has good elasticity, which can buffer the impact force when fixing the cylinder and avoid damage to the cylinder surface. At the same time, it increases the friction between the cylinder and the positioning seat and improves the fixing stability. The transparent strip allows real-time observation of the remaining lubricating oil in the oil cavity 441 and the state of the absorbent cotton 443, which facilitates timely oil replenishment.

[0040] A drive for rotating the column 41 is provided on one side of the support seat 3;

[0041] The driver includes a servo motor and a gearbox. The servo motor has a power of 0.3-0.75kW and is bolted to one side of the support seat 3 via a motor bracket. The gearbox is a planetary gear reducer with a reduction ratio of 1:20-1:50. The input end of the gearbox is connected to the output shaft of the servo motor via a coupling, and the output end is connected to the end of the column 41 away from the cylinder positioning seat 2 via a flat key. The servo motor achieves stepless speed regulation of 0.1-2r / min through a PLC controller. The reduction effect of the gearbox increases the output torque of the column 41 by 20-50 times. Even when carrying a heavy cylinder of 100kg, it can achieve precise micro-adjustment of the angle with an angle control accuracy of ±0.1°, solving the problems of low accuracy and laboriousness of traditional manual angle adjustment. At the same time, the flat key connection ensures stable power transmission and avoids slippage that could cause angle deviation.

[0042] The driver involved in this application is implemented using existing mature technology and is connected to an external PLC controller and power supply. This is a conventional technical means in this field, so its specific circuit connection, control logic and working process will not be described in detail.

[0043] This device has a cotton layer 9 on the cylinder positioning seat 2 to protect the cylinder, and a positioning hole 10 is provided in the cylinder positioning seat 2 and the cotton layer 9 to facilitate fixing the cylinder on the cylinder positioning seat 2. Starting the driver can drive the column 41 to rotate, thereby controlling the angle adjustment of the cylinder positioning seat 2. During the rotation of the cylinder positioning seat 2, the column 41 rotates in the support side seat 3. A high-strength bearing is provided between the column 41 and the support side seat 3, and multiple sliders 43 rotate in the annular groove 42 to distribute the pressure. The sliders 43 on the surface of the reinforcing block 431 are adapted to the limiting grooves 8 in the annular groove 42. At the same time, a lubricating element 44 is provided to facilitate the rolling action. The bead 432 is lubricated to reduce the rotational friction of the cylinder positioning seat 2. When oil replenishment is needed, the lubricating oil is introduced into the oil chamber 441 through the oil replenishment pipe 442. The oil chamber 441 is equipped with an annular absorbent cotton 443 to absorb the lubricating oil. The oil falls into the annular groove 42 through the holes in the filter plate 51. Alternatively, the pull rod 53 can be moved upward by pulling the pull block 6, which will cause the filter plate 51 to move upward and squeeze the absorbent cotton 443, squeezing out the lubricating oil stored in the absorbent cotton 443 and allowing it to flow into the annular groove 42 through the holes in the filter plate 51. A drain groove is also provided at the bottom of the annular groove 42. A transparent strip is provided on one side of the oil chamber 441 to facilitate observation of the internal condition of the oil chamber 441.

[0044] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A positioning fixture for machining the cylinder body of a concrete conveying pump, characterized in that, include: The base (1), cylinder positioning seat (2), support side seat (3) and rotating mechanism (4) are provided. The top of the base (1) is provided with two support side seats (3). The cylinder positioning seat (2) is installed between the two support side seats (3) through the rotating mechanism (4). The rotating mechanism (4) is used to rotate the cylinder positioning seat (2) to reduce friction. The rotating mechanism (4) includes a column (41), an annular groove (42), a slider (43), and a lubricant (44). One end of the column (41) is fixed to one side of the cylinder positioning seat (2), and the inside is slidably installed in the support side seat (3). A plurality of sliders (43) are distributed in an annular pattern on one side of the cylinder positioning seat (2). An annular groove (42) for sliding of the plurality of sliders (43) is provided on one side of the support side seat (3). The lubricant (44) is located on the top of the support side seat (3) and is used to make the sliders (43) slide in the annular groove (42) to reduce friction.

2. The positioning fixture for machining the cylinder body of a concrete conveying pump according to claim 1, characterized in that: The lubricating component (44) includes an oil cavity (441), an oil supply pipe (442), and absorbent cotton (443). The oil cavity (441) is located in the support side seat (3) and is connected to the annular groove (42). The oil cavity (441) is connected to the oil supply pipe (442) on one side and is equipped with absorbent cotton (443) inside.

3. A positioning fixture for machining the cylinder body of a concrete conveying pump according to claim 2, characterized in that: The oil cavity (441) is provided with an extrusion component (5), which includes a filter plate (51), a positioning ring (52) and a pull rod (53). The outer edge of the positioning ring (52) is fixed inside the oil cavity (441), and the pull rod (53) is movably sleeved inside. The filter plate (51) is fixedly installed at the lower end of the pull rod (53). The absorbent cotton (443) is annular and located between the filter plate (51) and the positioning ring (52).

4. A positioning fixture for machining the cylinder body of a concrete conveying pump according to claim 3, characterized in that: A pull block (6) is fixedly installed on the top of the pull rod (53), and a cap (7) is threaded on the top of the oil replenishment pipe (442).

5. A positioning fixture for machining the cylinder body of a concrete conveying pump according to claim 1, characterized in that: The slider (43) includes a reinforcing block (431) and a ball bearing (432). Multiple reinforcing blocks (431) are arranged in a ring on the side of the rod positioning seat, and the ball bearing (432) is rotatably mounted on the surface of the reinforcing block (431).

6. A positioning fixture for machining the cylinder body of a concrete conveying pump according to claim 5, characterized in that: The annular groove (42) is provided with a limiting groove (8) for the rotation of the ball (432).

7. A positioning fixture for machining the cylinder body of a concrete conveying pump according to claim 1, characterized in that: A cotton layer (9) is fixedly installed on the bottom of the inner wall of the cylinder positioning seat (2). Both the cotton layer (9) and the cylinder positioning seat (2) are provided with positioning holes (10) for fixing the cylinder.

8. A positioning fixture for machining the cylinder body of a concrete conveying pump according to claim 1, characterized in that: The support side seat (3) is provided with a drive for rotating the column (41).

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