An inner wall support assembly for crimping, assembling, and machining the ends of circular pipe fittings.

Abstract

An inner wall support assembly for crimping, assembling, and processing the ends of circular pipe fittings includes a support plate. The support plate has a support mechanism and a drive mechanism on its front and rear sides, respectively. The drive mechanism includes a motor and an electric push rod. The support mechanism includes a support cylinder, an inner push rod, and a support member. The support member is slidably mounted on the support cylinder. The inner push rod is coaxially and movably mounted inside the support cylinder, with its surface always in contact with the bottom of the support member. The inner push rod has at least one step along its axial direction. The motor drives the support cylinder to rotate, thereby achieving rotational support of the support member on the inner wall of the pipe fitting. The electric push rod is rotatably connected to the inner push rod, thereby driving the inner push rod to achieve support of the support member on the inner wall of pipe fittings of different sizes. This invention not only achieves rigid rolling support of the inner wall of the circular pipe fitting without dead angles in the front-rear direction, avoiding the problem of uneven support of the inner wall of the pipe fitting, but also allows for height adjustment of the support member's extension relative to the surface of the support cylinder through the inner push rod.

Description

Technical Field

[0001] This invention relates to the field of pipe fitting port processing technology, and in particular to an inner wall support assembly for crimping, assembling and processing of circular pipe fitting ports. Background Technology

[0002] When round pipe fittings are processed such as end crimping, assembly or machining, excessive external force often causes deformation of the inner wall of the pipe fitting, which in turn directly leads to a decline in the quality of pipe fitting processing.

[0003] For example, when crimping the end joints of hydraulic hoses made of rubber, the softness of the hydraulic hose often results in a lack of stress points, leading to unreliable crimping and even poor sealing. To solve this problem, a support device is often inserted into the hydraulic hose during crimping to support the inner wall of the hose. For instance, in the Chinese invention patent application with patent number 202211154335.X entitled "A Crimping Device for Hydraulic Hose Assembly and Its Working Method," the crimping is achieved by inserting an inflatable expansion head into the hydraulic hose port for support.

[0004] However, in practice, it has been found that because the joint is deformed by applying external force during crimping, and the inflatable expansion head still has elasticity even with high inflation pressure, the crimping effect of the joint is not ideal.

[0005] For example, when assembling or processing end connectors for thin-walled circular tubes, the thin walls and poor rigidity often lead to deformation or breakage. In such cases, a tube wall support device is needed. For instance, Chinese invention patent application number 202111497468.2, entitled "A Support Device for the Inner Wall of a Circular Thin-Walled Part," describes a support device that limits the movement trajectory of the moving column by setting corresponding upper and lower adjustment holes on the upper and lower mounting plates. This also limits the adjustable range of the support column in each support unit. By axially connecting the various parts of the support unit, fixing the two ends of the fixed column of the support unit to the upper and lower mounting plates respectively, setting the two ends of the moving column of the support unit in the corresponding upper and lower adjustment holes respectively, and connecting the transmission component of the support unit to a gear transmission, the position of the support column can be adjusted via gear transmission. This allows for the support of circular thin-walled parts with different inner diameters, while reducing vibration and deformation during processing, and improving processing accuracy and quality.

[0006] However, the above solution has a problem: the inner wall support of thin-walled pipes relies on point support rather than surface support. Although this reduces the occurrence of deformation to some extent, it cannot completely prevent it. At the same time, the small area of ​​the support points may cause pits to appear on the inner wall of the pipe.

[0007] In conclusion, it is essential to develop an internal wall support device / component that can provide rigid support for the pipe wall while preventing deformation of the pipe wall due to insufficient support contact area. Summary of the Invention

[0008] To address the above problems, this invention proposes an inner wall support assembly for the crimping, assembly, and processing of circular pipe fittings. The technical solution used is as follows:

[0009] An inner wall support assembly for crimping, assembling, and processing the ends of circular pipe fittings includes a support plate. The support plate has a support mechanism and a drive mechanism on its front and rear sides, respectively. The drive mechanism includes a motor and an electric push rod. The support mechanism includes a support cylinder, an inner push rod, and a support member. The support member is slidably mounted on the support cylinder. The inner push rod is coaxially and movably mounted inside the support cylinder, and its surface is always in contact with the bottom of the support member. The inner push rod has at least one step along its axial direction. The motor drives the support cylinder to rotate, thereby achieving rotational support of the support member for the inner wall of the pipe fitting. The electric push rod is rotatably connected to the inner push rod via a connector, thereby driving the inner push rod to achieve support of the inner wall of pipe fittings of different sizes.

[0010] Furthermore, the support cylinder includes a support hole, a mounting ring plate, and a sliding hole; the support hole is distributed in a ring shape from front to back in the front half of the support cylinder; the support member includes a sliding rod, a support arc plate, and a tension spring; the sliding rod and the support arc plate are rotatably connected; the sliding rod is installed in the support hole through the tension spring, and the support arc plates on the corresponding support members at the front and rear are in contact end to end; the mounting ring plate is located at the rear end of the support cylinder, and the support cylinder is rotatably connected to the support plate through the mounting ring plate; the front end of the support cylinder is provided with a sealing plate, and the sliding hole is located at the center of the sealing plate; the inner push rod is slidably connected to the sliding hole.

[0011] Furthermore, the support hole includes a limiting channel and a flared channel. The limiting channel is straight and located at the lower end of the flared channel, and communicates with the flared channel. The flared channel expands in a "V" shape from bottom to top along the circumference of the support cylinder, forming a support opening angle inclined surface one and a support opening angle inclined surface two with different expansion angles.

[0012] Furthermore, the opening angle of the first supporting inclined plane is 45-60 degrees, and the opening angle of the second supporting inclined plane is 15-30 degrees.

[0013] Furthermore, the edge of the sliding hole is provided with several guide grooves along the axial direction away from the support member, and the outer surface of the inner push rod is provided with a guide plate, and the guide plate and the guide groove are slidably connected.

[0014] Furthermore, the support also includes a connecting plate; the upper and lower ends of the connecting plate are rotatably connected to the supporting arc plate and the sliding rod, respectively; the sliding rod is slidably disposed within the limiting channel; the tension spring is sleeved on the sliding rod, with one end connected to the upper end of the sliding rod and the other end connected to the lower end of the limiting channel; the lower end of the sliding rod is always in contact with the surface of the inner top rod under the reset action of the tension spring, and the lowest point of the upper end during the sliding process of the sliding rod is higher than the limiting channel; the connecting plate contacts the first or second support opening angle inclined surface during the rotation of the support cylinder, for further adjusting the height of the supporting arc plate extending out of the support cylinder.

[0015] Furthermore, the drive mechanism also includes a pulley and a belt; the pulley is fixedly mounted on the output end of the motor; a second pulley is fixedly provided on the rear end surface of the support cylinder, and the pulley and the second pulley are connected by belt drive.

[0016] Furthermore, the connector includes a connecting block and a guide rod; the connecting block is fixedly installed on the output end of the electric push rod and rotatably connected to the rear end of the inner push rod; the guide rod is fixed on both sides of the connecting block and slidably connected to the support plate.

[0017] Because the present invention adopts the above-described technical solution, the present invention has the following advantages:

[0018] 1. This invention, through the coordinated design of the support cylinder, inner push rod, and support member in the support mechanism, not only achieves rigid rolling support for the inner wall of a circular pipe without dead angles in the front-to-back direction, effectively avoiding the problem of uneven support for the inner wall of the pipe caused by point support and the potential damage to the pipe itself, but also allows for the adjustment of the height of the support member extending relative to the surface of the support cylinder through the inner push rod, effectively improving the applicability to different pipe inner diameters; in addition, by designing the inner push rod to be replaceable, this invention not only further expands its applicability to pipes, but also reduces subsequent usage costs.

[0019] 2. By setting a guide plate on the inner top rod and a matching guide groove on the sliding hole of the support cylinder, the present invention effectively avoids the problem of friction or even abnormal noise caused by the support component being out of sync with the inner top rod during the rotation of the support cylinder, thereby improving the service life of the support component.

[0020] 3. By designing the flared channel in the support hole, the present invention further effectively expands the height adjustment range of the support member extending from the surface of the support cylinder without replacing the inner push rod. Attached Figure Description

[0021] Figure 1-3 5 is a schematic diagram of the overall assembly structure when the inner top rod of the support mechanism is supported at the large end in this invention.

[0022] Figure 4 For the present invention Figure 3 A schematic diagram of the cross-sectional structure at point AA.

[0023] Figure 6 For the present invention Figure 5 A schematic diagram of the cross-sectional structure at point BB.

[0024] Figure 7-9 Figures 11 and 11 are schematic diagrams of the overall assembly structure of the inner top rod of the support mechanism in this invention when it is supported at the small end.

[0025] Figure 10 For the present invention Figure 9 A schematic diagram of the cross-sectional structure at point CC.

[0026] Figure 12 For the present invention Figure 11 A schematic diagram of the cross-sectional structure at point DD.

[0027] Figure 13-14 This is a schematic diagram of the drive mechanism of the present invention.

[0028] Figure 15 This is a schematic diagram of the assembly structure of the electric push rod and connecting parts in the drive mechanism of the present invention.

[0029] Figure 16 , 21 This is a schematic diagram of the assembly structure of the support cylinder and the inner top rod in the support mechanism of the present invention.

[0030] Figure 17 For the present invention Figure 16 A magnified schematic diagram of the structure at point E in the middle.

[0031] Figure 18-19 This is an exploded structural diagram of the support cylinder and inner top rod in the support mechanism of the present invention.

[0032] Figure 20 For the present invention Figure 19 A magnified schematic diagram of the structure at point F in the middle.

[0033] Figure 22 For the present invention Figure 21 A schematic diagram of the cross-sectional structure at point GG.

[0034] Figure 23 This is a schematic diagram of the support component in the support mechanism of the present invention.

[0035] Icon labels:

[0036] 1-Support plate;

[0037] 11-Mounting slot

[0038] 2-Drive mechanism;

[0039] 21-Motor; 22-Electric actuator; 23-Pulley 1; 24-Connector (2401-Connecting block; 2402-Guide rod); 25-Belt;

[0040] 3-Supporting structures;

[0041] 31-Support cylinder [3101-Support hole (3101a-Limiting channel; 3101b-Support opening angle slope one; 3101c-Support opening angle slope two); 3102-Pulley two; 3103-Mounting ring plate; 3104-Thrust bearing; 3105-Granty cap; 3106-Sliding hole (3106a-Guide groove)]; 32-Inner push rod (3201-Guide plate); 33-Support component (3301-Sliding rod; 3302-Connecting plate; 3303-Support arc plate; 3304-Tension spring). Detailed Implementation

[0042] The technical solution of the present invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention; however, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0043] In the description of this invention, it should be noted that the terms "upper", "lower", "in", "out", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of this invention is usually placed when in use. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention. Example 1:

[0044] This embodiment is applied to the inner wall support of hydraulic pipelines during crimping joints. In this embodiment, the inner wall support assembly is slidably connected to the crimping fitting equipment via a support plate 1 along the crimping travel direction. The specific solution is as follows:

[0045] An inner wall support assembly for crimping, assembling, and machining the ends of circular pipe fittings, such as Figure 1-12As shown, the device includes a support plate 1, with a support mechanism 3 and a drive mechanism 2 on its front and rear sides, respectively. The drive mechanism 2 includes a motor 21 and an electric push rod 22. The support mechanism 3 includes a support cylinder 31, an inner push rod 32, and a support member 33. The support member 33 is slidably mounted on the support cylinder 31. The inner push rod 32 is coaxially and movably mounted inside the support cylinder 31, and its surface is always in contact with the bottom of the support member 33. An axial step is provided on the inner push rod 32. The motor 21 is used to drive the support cylinder 31 to rotate, so as to realize the rotational support of the support member 33 on the inner wall of the pipe fitting. The electric push rod 22 is rotatably connected to the inner push rod 32 through a connector 24, and thus the support member 33 supports the inner wall of pipe fittings of different sizes by driving the inner push rod 32. In this embodiment, the motor 21 and the electric push rod 22 can be controlled by setting a separate operation button, or they can be connected to the electrical control box of the pipe fitting crimping equipment to realize online control.

[0046] As one implementation method of this embodiment, such as Figure 1-15 As shown, the drive mechanism 2 also includes a pulley 23 and a belt 25; the pulley 23 is fixedly installed on the output end of the motor 21; the rear end surface of the support cylinder 31 is fixedly provided with a pulley 3102, and the pulley 23 and the pulley 3102 are connected by the belt 25.

[0047] The connector 24 includes a connecting block 2401 and a guide rod 2402. The connecting block 2401 is fixedly installed on the output end of the electric push rod 22 and is rotatably connected to the rear end of the inner push rod 32; the guide rod 2402 is fixed on both sides of the connecting block 2401 and is slidably connected to the support plate 1.

[0048] like Figure 17-21 As shown, the support cylinder 31 includes a support hole 3101, a mounting ring plate 3103, and a sliding hole 3106; the support holes 3101 are distributed in a ring shape from front to back in the front half of the support cylinder 31, and six support holes 3101 are evenly distributed on each ring surface; in order to reduce the weight of the support cylinder 31, such as Figure 4 and 12 As shown, the rear half of the support cylinder 31 is thinner than the front half;

[0049] like Figure 23 As shown, the support member 33 includes a slide rod 3301, a support arc plate 3303, and a tension spring 3304; the slide rod 3301 and the support arc plate 3303 are rotatably connected; the slide rod 3301 is installed in the support hole 3101 through the tension spring 3304, and the support arc plates 3303 on the support member 33 distributed at the front and rear are in contact at the head and tail.

[0050] The mounting ring plate 3103 is located at the rear end of the support cylinder 31. The support cylinder 31 is rotatably connected to the support plate 1 through the mounting ring plate 3103. The specific installation structure is as follows: the support plate 1 is provided with an annular mounting groove 11 corresponding to the mounting ring plate 3103. The mounting ring plate 3103 is installed in the mounting groove 11 through two thrust bearings 3104 at the front and rear. The mounting ring plate 3103 is pressed and sealed in the mounting groove 11 by the pressure cap 3105 at the top of the mounting groove 11 through a threaded connection, thereby completing the rotatable installation of the support cylinder 31 and the support plate 1.

[0051] The front end of the support cylinder 31 is provided with a sealing plate, and the sliding hole 3106 is located at the center of the sealing plate; the inner push rod 32 is slidably connected to the sliding hole 3106; at the same time, in order to make the inner push rod 32 slide more smoothly within the support cylinder 31, such as Figure 4 and 12 As shown, a sealing plate is also provided at the junction of the front half and the rear half inside the support cylinder 31, and a sliding hole 3106 is also provided in the center of the sealing plate.

[0052] During operation, the motor 21 drives the support cylinder 31 to rotate via the belt 25, which in turn drives the support member 33 to form rolling support against the inner wall of the pipe. Simultaneously, because the support arc plates 3303 on the correspondingly distributed support members 33 contact end-to-end, a seamless rolling support is formed in the front-to-back direction of the pipe wall, effectively avoiding the problem of uneven support to the inner wall of the pipe caused by point support, which could easily damage the pipe itself. The electric push rod 22 pushes and pulls the inner push rod 32 via the connecting member 24 to switch the contact between different stepped surfaces of the inner push rod 32 and the support member 33 (e.g., ...). Figure 1-12 As shown in the figure, the support member 33 extends to different heights relative to the outer surface of the support cylinder 31 to match different pipe diameters. Example 2:

[0053] To ensure that the support member 33 does not rub or even make abnormal noise due to asynchrony with the inner push rod 32 during rotation with the support cylinder 31, such as... Figure 6 , 10 As shown in Figures 19-20, six guide grooves 3106a are evenly distributed along the edge of the sliding hole 3106, avoiding the support member 33. A guide plate 3201 is provided on the outer surface of the inner push rod 32. The guide plate 3201 and the guide grooves 3106a are slidably connected. The design of this embodiment effectively improves the wear condition of the support member 33. Example 3:

[0054] To further increase the adjustable height of the support member 33 relative to the outer surface of the support cylinder 31 without replacing the inner push rod 32, such as... Figure 22As shown, the support hole 3101 includes a limiting channel 3101a and a flared channel. The limiting channel 3101a is straight and located at the lower end of the flared channel, and communicates with the flared channel. The flared channel expands in a "V" shape from bottom to top along the circumference of the support cylinder 31, forming a support opening angle inclined surface 1 3101b and a support opening angle inclined surface 2 3101c with different expansion angles.

[0055] In this embodiment, the opening angle of the first supporting inclined plane 3101b is 45 degrees, and the opening angle of the second supporting inclined plane 3101c is 20 degrees.

[0056] like Figure 23 As shown, the support member 33 also includes a connecting plate 3302; the upper and lower ends of the connecting plate 3302 are rotatably connected to the support arc plate 3303 and the slide rod 3301, respectively; the slide rod 3301 is slidably disposed in the limiting channel 3101a; the tension spring 3304 is sleeved on the slide rod 3301, with one end connected to the upper end of the slide rod 3301 and the other end connected to the lower end of the limiting channel 3101a; the lower end of the slide rod 3301 is always in contact with the surface of the inner top rod 32 under the reset action of the tension spring 3304, and the lowest point of the upper end during the sliding process of the slide rod 3301 is higher than the limiting channel 3101a; the connecting plate 3302 is in contact with the first support angle inclined surface 3101b or the second support angle inclined surface 3101c during the rotation of the support cylinder 31;

[0057] Without replacing the inner push rod 32, when the connecting plate 3302 needs to contact the first support angle inclined surface 3101b during the rotation of the support cylinder 31, the motor 21 drives the support cylinder 31 clockwise, and the connecting plate 3302 completes the contact with the first support angle inclined surface 3101b under its own weight and the centrifugal force of the support arc plate 3303; conversely, the motor 21 drives the support cylinder 31 counterclockwise, and the connecting plate 3302 completes the contact with the first support angle inclined surface 3101b under its own weight and the centrifugal force of the support arc plate 3303; the connecting plate 3302 completes the contact with the second support angle inclined surface 3101c under its own weight and the centrifugal force of the support arc plate 3303; thus, the height of the support arc plate 3303 extending relative to the outer surface of the support cylinder 31 is adjusted; then the support arc plate 3303 contacts the inner wall of the pipe and forms a rolling support.

[0058] The work steps are as follows:

[0059] The first step is to assemble the hydraulic lines and fittings together and place them inside the crimping device;

[0060] The second step involves calculating and matching the inner diameter of the hydraulic pipeline, installing the inner push rod 32, and determining the swing direction of the connecting plate 3302 (i.e., whether the connecting plate 3302 contacts the support opening angle inclined surface 1 3101b or the support opening angle inclined surface 2 3101c).

[0061] The third step is to push the inner wall support assembly of this embodiment toward the hydraulic pipeline port and push the front half of the support cylinder 31 into the hydraulic pipeline;

[0062] Fourth step, turn on the electric push rod 22 to pull the inner push rod 32 to the calculated set position; then turn on the motor 21 according to the swing direction of the connecting plate 3302, so that the support member 33 forms rolling support on the inner wall of the hydraulic pipeline;

[0063] Fifth step: Turn on the crimping device to complete the crimping of the connector;

[0064] Step 6: Withdraw the inner wall support assembly of this embodiment in the opposite direction along the hydraulic pipeline;

[0065] The above steps complete the inner wall support of the hydraulic pipeline during the joint crimping process in this embodiment.

Claims

1. An inner wall support assembly for crimping, assembling, and machining the ends of circular pipe fittings, comprising a support plate (1), characterized in that, The support plate (1) is provided with a support mechanism (3) and a drive mechanism (2) on its front and rear sides respectively; the drive mechanism (2) includes a motor (21) and an electric push rod (22); the support mechanism (3) includes a support cylinder (31), an inner push rod (32) and a support member (33); the support member (33) is slidably disposed on the support cylinder (31); the inner push rod (32) is coaxially disposed inside the support cylinder (31) and its surface is always in contact with the bottom of the support member (33); the inner push rod (32) has at least one step along the axial direction; the motor (21) is used to drive the support cylinder (31) to rotate so as to realize the rotational support of the support member (33) on the inner wall of the pipe fitting; the electric push rod (22) is rotatably connected to the inner push rod (32) through a connector (24), and then the support member (33) supports the inner wall of pipe fittings of different sizes by driving the inner push rod (32); The support cylinder (31) includes a support hole (3101), a mounting ring plate (3103), and a sliding hole (3106); the support hole (3101) is distributed in a ring shape from front to back in the front half of the support cylinder (31); the support member (33) includes a sliding rod (3301), a support arc plate (3303), and a tension spring (3304); the sliding rod (3301) and the support arc plate (3303) are rotatably connected; the sliding rod (3301) is installed in the support hole (3101) through the tension spring (3304), and the support arc plates (3303) on the support members (33) distributed in front and back are in contact at both ends; The support hole (3101) includes a limiting channel (3101a) and a flared channel. The limiting channel (3101a) is straight and located at the lower end of the flared channel, and communicates with the flared channel. The flared channel extends in a "V" shape from bottom to top along the circumference of the support cylinder (31), forming a support opening angle inclined surface one (3101b) and a support opening angle inclined surface two (3101c) with different opening angles. The support member (33) further includes a connecting plate (3302); the upper and lower ends of the connecting plate (3302) are rotatably connected to the supporting arc plate (3303) and the sliding rod (3301) respectively; The connecting plate (3302) contacts the first support angle inclined surface (3101b) or the second support angle inclined surface (3101c) during the rotation of the support cylinder (31) to further adjust the height of the support arc plate (3303) extending out of the support cylinder (31).

2. The inner wall support assembly for crimping, assembling, and processing the end of a circular pipe fitting according to claim 1, characterized in that, The mounting ring plate (3103) is located at the rear end of the support cylinder (31), and the support cylinder (31) is rotatably connected to the support plate (1) through the mounting ring plate (3103); the front end of the support cylinder (31) is provided with a sealing plate, and the sliding hole (3106) is located at the center of the sealing plate; the inner top rod (32) is slidably connected to the sliding hole (3106).

3. The inner wall support assembly for crimping, assembling, and processing the end of a circular pipe fitting according to claim 2, characterized in that, The opening angle of the first supporting inclined plane (3101b) is 45-60 degrees, and the opening angle of the second supporting inclined plane (3101c) is 15-30 degrees.

4. The inner wall support assembly for crimping, assembling, and processing the end of a circular pipe fitting according to claim 2, characterized in that, The edge of the sliding hole (3106) is provided with a number of guide grooves (3106a) along the axial direction away from the support member (33). The outer surface of the inner top rod (32) is provided with a guide plate (3201). The guide plate (3201) and the guide groove (3106a) are slidably connected.

5. The inner wall support assembly for crimping, assembling, and processing the end of a circular pipe fitting according to claim 2, characterized in that, The slide rod (3301) is slidably disposed within the limiting channel (3101a); the tension spring (3304) is sleeved on the slide rod (3301), with one end connected to the upper end of the slide rod (3301) and the other end connected to the lower end of the limiting channel (3101a); the lower end of the slide rod (3301) is always in contact with the surface of the inner top rod (32) under the reset action of the tension spring (3304), and the lowest point of the upper end during the sliding process of the slide rod (3301) is higher than the limiting channel (3101a).

6. An inner wall support assembly for crimping, assembling, and machining the end of a circular pipe fitting according to any one of claims 1-5, characterized in that, The drive mechanism (2) also includes a pulley (23) and a belt (25); the pulley (23) is fixedly installed on the output end of the motor (21); the rear end surface of the support cylinder (31) is fixedly provided with a pulley (3102), and the pulley (23) and the pulley (3102) are connected by the belt (25).

7. An inner wall support assembly for crimping, assembling, and machining the end of a circular pipe fitting according to any one of claims 1-5, characterized in that, The connector (24) includes a connecting block (2401) and a guide rod (2402); the connecting block (2401) is fixedly installed on the output end of the electric push rod (22) and rotatably connected to the rear end of the inner push rod (32); the guide rod (2402) is fixed on both sides of the connecting block (2401) and slidably connected to the support plate (1).

Images