Device for repairing welding seam at opening part of liquid storage cylinder of shock absorber

Abstract

The utility model relates to the field of weld joint repairing devices, and discloses a shock absorber liquid storage cylinder opening weld joint repairing device which comprises a bottom plate, a power device is fixed on the bottom plate, an output shaft of the power device is fixedly connected with a polishing head through a connecting rod located in front of the power device, the polishing head is horizontally arranged, and an opening of a liquid storage cylinder is arranged on the polishing head in a sleeved mode. An inner welding seam is in contact with the polishing head; and the power device drives the grinding head to rotate to grind the inner welding seam at the opening part of the liquid storage cylinder. The device has the advantages of being simple in structure, convenient to use, small in production investment, good in repairing effect and capable of reducing scrapping of the liquid storage cylinder due to poor inner weld joints to the maximum extent.

Description

Technical Field

[0001] The utility model relates to the field of weld repair devices, in particular to a weld repair device for the mouth part of a shock absorber liquid storage cylinder. Background Art

[0002] Due to the need to install an oil seal at the mouth part of the shock absorber liquid storage cylinder, high requirements are imposed on the shape of the mouth part of the liquid storage cylinder. For thick-walled liquid storage cylinders, machining is used to process the mouth part to ensure that the oil seal is in close contact with the inner wall of the liquid storage cylinder and does not leak oil. However, for thin-walled liquid storage cylinders, due to the low thickness of the mouth part, machining cannot be carried out. And the oil seal has high requirements for the weld shape of the mouth part of the liquid storage cylinder. There should be no steps at the position of the inner weld, and the inner weld must smoothly transition to the base material. Otherwise, an oil leakage failure mode is likely to occur at the contact part between the oil seal and the mouth part of the liquid storage cylinder. However, steps still appear at the position of the inner weld of the mouth part of the liquid storage cylinder, resulting in a non-smooth weld. Therefore, oil leakage is likely to occur after installing the oil seal. Content of the Utility Model

[0003] In order to overcome the problem that the inner weld of the mouth part of the liquid storage cylinder in the above background art is not smooth, resulting in easy oil leakage after installing the oil seal, the utility model provides a weld repair device for the mouth part of a shock absorber liquid storage cylinder. The weld of the mouth part of the liquid storage cylinder is repaired by a grinding head, so that it smoothly transitions to avoid the oil leakage failure mode after installing the oil seal. It has the beneficial effects of simple structure, convenient use, small production investment, good repair effect, and minimizing the scrapping of the liquid storage cylinder due to poor inner weld.

[0004] The technical solution of the utility model is as follows:

[0005] A weld repair device for the mouth part of a shock absorber liquid storage cylinder includes a bottom plate. A power device is fixed on the bottom plate. The output shaft of the power device is fixedly connected with a grinding head through a connecting rod located in front of it. The grinding head is horizontally arranged. The mouth part of the liquid storage cylinder is sleeved on the grinding head, and its inner weld is in contact with the grinding head. The power device drives the grinding head to rotate to grind the inner weld of the mouth part of the liquid storage cylinder.

[0006] Compared with the prior art, the beneficial effect of this technical solution lies in:

[0007] This technical solution sets a grinding head fixedly connected to the output shaft of the power device. Then, the inner weld at the position to be ground at the mouth part of the liquid storage cylinder is aligned with the grinding head. After starting the power device, the grinding head can precisely grind the steps on the inner weld, repair the inner weld, and make it smoothly transition to the base material to avoid the oil leakage failure mode after installing the oil seal. It has the beneficial effects of simple structure, convenient use, small production investment, good repair effect, and minimizing the scrapping of the liquid storage cylinder due to poor inner weld.

[0008] Preferably, the power device is a motor, which is externally connected with a three-phase plug and has a rotation speed of 1000 - 1200 revolutions per minute; the motor is fixed at one end of the bottom plate and is electrically connected to a switch located at the other end of the bottom plate.

[0009] Preferably, the connecting rod includes a motor connection section, an intermediate section, and a grinding head connection section connected in sequence, wherein the motor connection section is key-connected to the output shaft of the motor, both ends of the intermediate section are integrally connected to the motor connection section and the grinding head connection section respectively, and the grinding head is sleeved and fixed on the grinding head connection section; the diameter of the intermediate section is smaller than the diameters of the grinding head and the motor connection section.

[0010] More preferably, the length of the grinding head connection section ≥ 2 times the length of the grinding head.

[0011] More preferably, the circumferential direction of the grinding head connection section is tapped with left-handed threads and is thread-connected to the grinding head.

[0012] More preferably, the grinding head is a hundred-leaf wheel grinding head.

[0013] Preferably, mounting holes are respectively provided at the four corners of the bottom plate.

[0014] Preferably, a plurality of V-shaped blocks fixed on the bottom plate are provided along the length direction of the bottom plate in front of the power device, and the liquid storage cylinder is placed in the V-shaped opening of the V-shaped blocks.

[0015] More preferably, the V-shaped blocks are fixedly connected to the bottom plate through cushion blocks and their own heights are adjusted through the cushion blocks; the V-shaped blocks are made of polytetrafluoroethylene material and their V-shaped opening angles are 90°.

[0016] Preferably, a limiting block fixed on the bottom plate is also provided in front of the power device, and when grinding, the end of the liquid storage cylinder abuts against the limiting block. Description of the Drawings

[0017] The present utility model will be described in a manner referring to the drawings, wherein:

[0018] Figure 1 is a schematic structural diagram of the whole of the present utility model;

[0019] Figure 2 is a schematic structural diagram of the connecting rod of the present utility model;

[0020] Figure 3 is a front view of the V-shaped block of the present utility model.

[0021] Reference numerals: bottom plate 1, mounting hole 11, connecting rod 2, motor connection section 21, intermediate section 22, grinding head connection section 23, left-handed thread 231, grinding head 3, V-shaped block 4, cushion block 41, motor 5, switch 51, liquid storage cylinder 6. Detailed implementation manners

[0022] In order to make the objectives, technical solutions and advantages of the present utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0023] Embodiment 1: As shown in Figures 1 to 3 a weld repair device for the mouth part of a shock absorber liquid storage cylinder, which includes a horizontally arranged bottom plate 1. Installation holes 11 are respectively opened at the four corners of the bottom plate 1. The installation holes 11 are fixed to the working station by bolts. When it is necessary to carry this grinding device, a lifting ring can also be passed through the installation holes 11 for hoisting. A power device is fixed on the bottom plate 1. The power device is fixed on one side of the bottom plate 1, and the output shaft of the power device extends along the length direction of the bottom plate 1. The output shaft is fixedly connected to a grinding head 3 through a connecting rod 2. The connecting rod 2 is located in front of the output shaft, that is, one end of the connecting rod 2 can be fixedly connected to the output shaft by a key connection method. The grinding head 3 is sleeved and fixed at the other end of the connecting rod 2. The mouth part of the liquid storage cylinder 6 is sleeved on the grinding head 3, and its internal weld is in contact with the grinding surface of the grinding head 3. The grinding head 3 is aligned with the internal weld. When the power device is started, the output shaft rotates to drive the grinding head 3 to rotate, and the internal weld at the mouth part of the liquid storage cylinder 6 is ground.

[0024] Therefore, by setting the grinding head 3 fixedly connected to the output shaft of the power device, and then aligning the internal weld at the position to be ground at the mouth part of the liquid storage cylinder 6 with the grinding head 3, and starting the power device, the grinding head 3 can accurately grind the steps on the internal weld, repair the internal weld, and make it smoothly transition to the base material to avoid the failure mode of oil leakage after installing the oil seal. It has the beneficial effects of simple structure, convenient use, small production investment, good repair effect, and minimizing the scrapping of the liquid storage cylinder 6 due to poor internal welds to the greatest extent.

[0025] Embodiment 2: On the basis of Embodiment 1, the power device is preferably designed. The power device selects a motor 5. The motor 5 is externally connected to a 220V voltage through a three-phase plug. The rotation speed of the motor 5 is 1000 - 1200 revolutions per minute. Within this rotation speed range, the pressure exerted by the grinding head 3 on the internal weld can be well controlled, which can not only remove the steps on the surface of the internal weld and make it smoothly transition, but also avoid excessive damage to the surface due to excessive pressure. The motor 5 is fixed on one side of the bottom plate 1 and is electrically connected to a switch 51 located on the other side of the bottom plate 1. This layout position facilitates the operator to easily turn on or off the switch 51 of the motor 5 at the operation position when grinding the liquid storage cylinder 6 and control the state of the switch 51.

[0026] Embodiment 3: On the basis of Embodiment 1, an optimized design is carried out on the connecting rod 2. The connecting rod 2 includes a motor connection section 21, an intermediate section 22, and a grinding head connection section 23 that are connected in sequence. Among them, the motor connection section 21 is key-connected to the output shaft of the motor 5. The two ends of the intermediate section 22 are integrally connected to the motor connection section 21 and the grinding head connection section 23 respectively. The grinding head 3 is sleeved and fixed on the grinding head connection section 23. Thus, when the output shaft of the motor 5 rotates, the grinding head 3 can be driven to rotate through the connecting rod 2. Among them, the diameter of the intermediate section 22 is smaller than the diameters of the grinding head 3 and the motor connection section 21. Since the motor connection section 21 is directly fixed to the output shaft of the motor 5, a larger diameter of the motor connection section 21 is required to ensure the connection stability with the output shaft. And because the liquid storage cylinder 6 needs to be sleeved on the grinding head 3, and the inner weld range at the upper mouth of the liquid storage cylinder 6 is extensive, it is also necessary to move the position back and forth on the grinding head 3 so that the inner weld on the inner side of the liquid storage cylinder 6 can also be processed. Therefore, in necessary cases, the mouth of the liquid storage cylinder 6 will extend beyond the grinding head 3 and reach the intermediate section 22. Thus, it is necessary to set the diameter of the intermediate section 22 to be smaller than the diameter of the grinding head 3.

[0027] Furthermore, the length of the grinding head connection section 23 ≥ 2 times the length of the grinding head 3. This setting can increase the installation quantity of the grinding head 3. By installing multiple grinding heads 3, the grinding length can be increased, the grinding range can be expanded, and the grinding efficiency can be improved; the grinding head 3 is selected as a hundred-leaf wheel grinding head, which is a hundred-leaf wheel grinding head without a handle in this embodiment. The hundred-leaf wheel grinding head can polish the surface of the inner weld smoothly in a relatively short time, and the grinding effect is good; the circumferential direction of the grinding head connection section 23 is tapped with a left-handed thread 231, which is thread-connected to the grinding head 3. The left-handed thread is a reverse thread, and its rotation direction is opposite to the rotation direction of the output shaft of the motor 5. When carrying out the grinding work, the more the output shaft rotates, the tighter the grinding head connection section 23 and the grinding head 3 can be connected, avoiding the loosening of the grinding head 3 during work.

[0028] Embodiment 4: Based on Embodiment 1, an optimized design is carried out. Along the length direction of the bottom plate 1, a number of V-shaped blocks 4 are fixed. All the V-shaped blocks 4 are arranged in front of the motor 5. The liquid storage cylinder 6 is placed in the V-shaped opening of the V-shaped block 4. The number of V-shaped blocks 4 is not less than 2, and at least one block should be fixed under the front and rear parts of the liquid storage cylinder 6. The processing position of the liquid storage cylinder 6 can be preliminarily positioned by placing the liquid storage cylinder 6 on the V-shaped block 4, and the support stability of the liquid storage cylinder 6 can be maintained. There are 2-M10 threaded holes opened at the bottom of the V-shaped block 4, and it is fixedly connected to the cushion block 41 through bolts. The bottom of the cushion block 41 is fixedly connected to the bottom plate 1 through bolts. The V-shaped block 4 can adjust its own height through the cushion block 41. Since the diameters of different models of the liquid storage cylinder 6 are different, it is impossible to ensure that the inner welds of all different liquid storage cylinders 6 can contact the grinding head 3 after being placed on the V-shaped block 4. By setting the cushion block 41, the height of the V-shaped block 4 can be changed to adapt to different models of the liquid storage cylinder 6, so that the position of its inner weld can be in close contact with the position of the grinding head 3. The V-shaped block 4 is made of polytetrafluoroethylene material, and the polytetrafluoroethylene material has a lower hardness to avoid damaging the surface of the liquid storage cylinder 6. The V-shaped inner opening angle of the V-shaped block 4 is 90°, which can stably place liquid storage cylinders 6 with different thicknesses.

[0029] Embodiment 5: Based on Embodiment 1, an optimized design is carried out. There is also a limit block fixed on the bottom plate 1 in front of the motor 5. During grinding, the end of the liquid storage cylinder 6 abuts against the limit block, that is, the limit block is fixed between the front end of the motor 5 and the end of the liquid storage cylinder 6. The actual installation position of the limit block can be set according to the position of the inner weld of the liquid storage cylinder 6 that needs to be ground.

[0030] During use, first assemble the device completely, install an appropriate number of grinding heads 3 according to needs, start the power supply, and the grinding head 3 rotates. Then hold the liquid storage cylinder 6 tightly by hand, put the liquid storage cylinder 6 on the grinding head 3, slowly press down the liquid storage cylinder 6, and at the same time rotate it left and right along the inner weld of the liquid storage cylinder 6, and the rotation angle ≤ 5°. Then move the steel pipe axially according to the grinding length requirement until all the places that need to be ground are ground to meet the requirements. The maximum axial movement position is that the end of the liquid storage cylinder 6 abuts against the limit block.

[0031] The above embodiments only represent the specific implementation manners of the present application, and the description is relatively specific and detailed, but it should not be construed as a limitation on the protection scope of the present application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the technical solution of the present application, several deformations and improvements can still be made, and these all belong to the protection scope of the present application.

Claims

1. A repair device for the weld seam at the mouth of a shock absorber liquid storage cylinder, characterized in that: It includes a bottom plate (1), on which a power device is fixed. The output shaft of the power device is fixedly connected to a grinding head (3) through a connecting rod (2) located in front of it. The grinding head (3) is horizontally arranged. The mouth of a liquid storage cylinder (6) is sleeved on the grinding head (3), and its inner weld contacts the grinding head (3). The power device drives the grinding head (3) to rotate to grind the inner weld at the mouth of the liquid storage cylinder (6). In front of the power device, along the length direction of the bottom plate (1), there are several V-shaped blocks (4) fixed on the bottom plate (1), and the liquid storage cylinder (6) is placed in the V-shaped opening of the V-shaped blocks (4).

2. The weld repair device for the liquid storage cylinder opening of a shock absorber according to claim 1, characterized in that: The power device selected is a motor (5). The motor (5) is externally connected with a three-phase plug, and its rotation speed is 1000 - 1200 revolutions per minute. The motor (5) is fixed at one end of the bottom plate (1) and is electrically connected to a switch (51) located at the other end of the bottom plate (1).

3. A shock absorber liquid storage cylinder mouth weld repair device according to claim 1, characterized in that: The connecting rod (2) includes a motor connection section (21), an intermediate section (22), and a grinding head connection section (23) connected in sequence. Among them, the motor connection section (21) is key-connected to the output shaft of the motor (5). The two ends of the intermediate section (22) are integrally connected to the motor connection section (21) and the grinding head connection section (23) respectively. The grinding head (3) is sleeved and fixed on the grinding head connection section (23). The diameter of the intermediate section (22) is smaller than the diameters of the grinding head (3) and the motor connection section (21).

4. The weld repair device for the liquid storage cylinder opening of a shock absorber according to claim 3, characterized in that: The length of the grinding head connection section (23) ≥ 2 times the length of the grinding head (3).

5. The weld repair device for the mouth part of a shock absorber liquid storage cylinder according to claim 3, characterized in that: The circumferential direction of the grinding head connection section (23) is tapped with a left-handed thread (231), and it is thread-connected to the grinding head (3).

6. The shock absorber liquid storage cylinder mouth weld repair device according to claim 1 or claim 5, characterized in that: The grinding head (3) selected is a hundred-leaf wheel grinding head.

7. A shock absorber liquid storage cylinder mouth weld repair device according to claim 1, characterized in that: Installation holes (11) are respectively opened at the four corners of the bottom plate (1).

8. A shock absorber liquid storage cylinder mouth weld repair device according to claim 1, characterized in that: The V-shaped blocks (4) are fixedly connected to the bottom plate (1) through pads (41) below, and their own heights are adjusted through the pads (41). The V-shaped blocks (4) are made of polytetrafluoroethylene material, and their V-shaped opening angle is 90°.

9. The weld repair device for the liquid storage cylinder opening of a shock absorber according to claim 1, wherein: There is also a limit block fixed on the bottom plate (1) in front of the power device. During grinding, the end of the liquid storage cylinder (6) abuts against the limit block.

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