Punching device for refrigerator door liner

Abstract

The invention relates to the technical field of refrigerator door liner pricking, in particular to a refrigerator door liner pricking device which comprises a conveying belt mounted on a feeding table, a pricking mechanism for pricking a refrigerator door liner is arranged on the feeding table, and a distance adjusting mechanism for adjusting the distance and pricking the refrigerator door liner is arranged on the pricking mechanism. According to the punching device, the electric air cylinder pushes the punching needle at the bottom of the electric air cylinder to vertically move downwards to punch the refrigerator door liner on the feeding table, manual punching is not needed, the punching efficiency is improved, and the situation that the hole diameter is uneven due to the fact that the manual punching depth is different is avoided; the counter-acting force generated when the two electric contacts make contact with each other pushes the sliding rod to move upwards and extrudes the flexible spring till the two electric contacts make contact with each other and send out an electric signal, the flexible spring is reset, the two electric contacts are disconnected, and the electric air cylinder stops moving downwards along with the punching needle penetrating through the door liner, punching is completed, and meanwhile the situation that the door liner is punched through due to the fact that the electric air cylinder moves downwards too deep is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of refrigerator door liner punching holes, and in particular to a refrigerator door liner punching hole device. Background Art

[0002] The exhaust holes on the refrigerator door are an important part of the refrigerator production process, mainly used for filling and exhausting the insulation layer. In the refrigerator production process, there is a process called foaming, which is to fill the insulation layer material (foaming material) between the refrigerator liner and the outer shell. Since the foaming material is liquid, in order to ensure that every corner can be filled in place, some exhaust holes need to be punched on the liner as a guide. These exhaust holes are essential in the refrigerator production process. Without these holes, the internal structure of the refrigerator may fail or have problems.

[0003] The diameter, position and number of the exhaust holes of different refrigerator door liners are different, and most of the exhaust holes are located on the curved surface of the door liners. Therefore, manual punching is still widely used. However, manual punching can only punch ventilation holes with a diameter of 0.8-1 mm, and it is impossible to ensure that the diameter of the holes is uniform. The labor intensity of employees is high, the production efficiency is low, and it is difficult to ensure the quality of the holes. Summary of the invention

[0004] In view of the shortcomings of the prior art, the present invention provides a refrigerator door liner punching device, which solves the technical problems of the prior art of manually punching holes one by one, which has high labor intensity, low production efficiency, and cannot ensure the uniformity of the punched hole diameter, thereby achieving the purpose of improving the punching efficiency and punching quality.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: a refrigerator door liner punching device, comprising a conveyor belt installed on a loading platform for conveying the refrigerator door liner, the loading platform is provided with a punching mechanism for punching holes in the refrigerator door liner, and the punching mechanism is provided with a distance adjusting mechanism for adjusting the distance of punching holes in refrigerator door liner of different sizes.

[0006] The piercing mechanism includes support frames installed on the left and right sides of the loading platform, and a crossbeam is symmetrically installed between the two support frames. An electric cylinder is installed at the bottom of the crossbeam, and a piercing needle is installed at the free end of the bottom of the electric cylinder. A depth adjustment component for adjusting and controlling the piercing depth is arranged between the electric cylinder and the piercing needle, and a broken needle detection component for detecting whether the piercing needle is broken is arranged on the electric cylinder.

[0007] A further improvement is that the depth adjustment assembly includes a sliding hole opened in the free end of the electric cylinder, and a flexible spring is installed on the top wall of the sliding hole, the other end of the flexible spring is installed with a sliding rod connected to the inner wall of the sliding hole for up and down sliding, and the piercing needle is installed at the bottom of the sliding rod, and electrical contacts are symmetrically installed on the top wall of the sliding hole and the top of the sliding rod.

[0008] A further improvement is that the broken needle detection assembly includes a needle sleeve installed at the free end of the electric cylinder and located outside the puncture needle head, a mounting groove is opened at the bottom of the needle sleeve, and a pressure sensor is installed in the mounting groove.

[0009] A further improvement is that the distance adjustment mechanism includes a slide groove opened on the right support frame, and the right ends of the two beams are respectively slidably connected to the inside of the slide groove, and a bidirectional motor is installed on the side of the right support frame, the front and rear output ends of the bidirectional motor are connected to threaded rods, and the end of the threaded rod is rotatably connected to the bearing installed on the side of the right support frame, and the right end of the beam is provided with a threaded hole matching the threaded rod, and is threadedly connected to the threaded rod through the threaded hole.

[0010] A further improvement is that a T-shaped slider is installed on the left end of the beam, and a T-shaped slide groove matching the T-shaped slider is opened on the left support frame, an adjustment component for adjusting the hole spacing is provided on the beam, and centering components for centering and fixing the refrigerator door liner are symmetrically installed on the front and rear sides of the loading platform.

[0011] A further improvement is that the adjustment component includes a bar hole penetrating through the crossbeam, and a matching I-frame is installed on the bar hole, and the electric cylinder is installed at the bottom of the I-frame, and bolt holes are arranged in an array on the front and rear sides of the I-frame and on the crossbeam, and bolts are threadedly connected in the bolt holes.

[0012] A further improvement is that a length gauge is engraved on the side of the crossbeam and a handle is installed on the I-shaped frame.

[0013] A further improvement is that the centering component includes an electric push rod installed on the loading platform, and a push plate for pushing and centering the refrigerator door liner on the conveyor belt is installed at the free end of the electric push rod.

[0014] By means of the above technical solution, the present invention provides a refrigerator door liner punching device, which has at least the following beneficial effects:

[0015] 1. The present invention pushes the piercing needle head at the bottom thereof to move vertically downward through an electric cylinder to pierce holes in the refrigerator door liner on the loading table, without the need for manual piercing, thereby improving the piercing efficiency and avoiding the occurrence of uneven hole diameters caused by different piercing depths by manual piercing.

[0016] 2. In the present invention, when the piercing needle moves down to contact with the refrigerator door to pierce a hole, the reaction force of the contact between the two pushes the slide bar to move up and squeezes the flexible spring until the two electrical contacts contact and send out an electrical signal. As the piercing needle penetrates the refrigerator door, the flexible spring resets, the two electrical contacts are disconnected, and the electric cylinder stops moving down. Thus, while completing the piercing, it avoids moving down too deep, which would cause the door to be pierced.

[0017] 3. In the present invention, when the puncture needle breaks and becomes shorter, the broken puncture needle contacts the door bladder and pushes the slide bar upward, which causes the pressure sensor on the needle sleeve to contact the surface of the door bladder. At this time, the pressure sensor sends an electrical signal to alarm that the puncture needle is broken, and it can be replaced in time.

[0018] 4. The present invention drives the threaded rod to rotate through a bidirectional motor, thereby driving the crossbeam to move relative to or opposite to each other inside the slide slot until the piercing needle on the crossbeam moves to the top of the door bladders of different sizes to perform piercing work, thereby improving the application range of the device.

[0019] 5. The present invention can move the piercing needle at the bottom by pulling the handle to drive the workpiece frame to move left and right along the strip hole, and can achieve precise adjustment of the spacing by cooperating with the length table engraved on the crossbeam. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings described herein are used to provide further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute improper limitations on the present application.

[0021] In the attached picture:

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 It is a partial enlarged structural schematic diagram of the hole-piercing mechanism and the adjusting assembly of the present invention;

[0024] Figure 3 It is a schematic diagram of the partially enlarged and disassembled structure of the piercing mechanism and the adjusting component of the present invention;

[0025] Figure 4 This is a schematic diagram of the disassembled structure of the broken needle detection component of the present invention;

[0026] Figure 5 It is a schematic diagram of the cross-sectional structure of the depth adjustment component of the present invention;

[0027] Figure 6 This is a schematic diagram of the independent split structure of the distance adjustment mechanism of the present invention;

[0028] Figure 7It is a schematic diagram of the cross-sectional split structure of the support frame and one end of the crossbeam of the present invention.

[0029] In the figure: 1. Loading table; 2. Conveyor belt;

[0030] 3. Punching mechanism; 31. Support frame; 32. Crossbeam; 33. Electric cylinder; 34. Punching needle;

[0031] 35. Depth adjustment assembly; 351. Slide hole; 352. Flexible spring; 353. Slide rod; 354. Electrical contact;

[0032] 36. Broken needle detection assembly; 361. Needle sleeve; 362. Mounting slot; 363. Pressure sensor;

[0033] 4. Pitch adjustment mechanism; 41. Slideway; 42. Bidirectional motor; 43. Threaded rod; 44. Bearing; 45. Threaded hole; 46. T-shaped slider; 47. T-shaped slideway;

[0034] 48, adjustment assembly; 481, bar hole; 482, work frame; 483, bolt hole; 484, bolt; 485, handle;

[0035] 49. Centering assembly; 491. Electric push rod; 492. Push plate. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] Example 1

[0038] Based on the existing existing technology, which uses a manual method of punching holes one by one, the labor intensity is high, the production efficiency is low, and the diameter of the holes cannot be guaranteed to be uniform, this embodiment provides a refrigerator door liner punching device, please refer to Figure 1-Figure 7 The embodiment provides a refrigerator door liner punching device, which can improve the punching efficiency and punching quality. The refrigerator door liner punching device includes a conveyor belt 2 installed on a loading platform 1 for conveying the refrigerator door liner, a punching mechanism 3 for punching holes in the refrigerator door liner is provided on the loading platform 1, and a distance adjustment mechanism 4 for adjusting the distance of punching holes in refrigerator door liners of different sizes is provided on the punching mechanism 3. The distance between the punching needles 34 in the punching mechanism 3 is adjusted by the distance adjustment mechanism 4, so as to perform targeted adjustment for refrigerator door liners of different types and sizes, thereby improving the application range of the device, and then the punching mechanism 3 is started to punch holes in the refrigerator door liner.

[0039] Since the prior art adopts the method of manually punching holes one by one, which has high labor intensity, low production efficiency, and cannot ensure that the diameter of the holes is uniform, the device is provided with a punching mechanism 3, which includes support frames 31 installed on the left and right sides of the loading platform 1, and a crossbeam 32 is symmetrically installed between the two support frames 31, an electric cylinder 33 is installed at the bottom of the crossbeam 32, and a punching needle 34 is installed at the free end of the bottom of the electric cylinder 33, a depth adjustment component 35 for adjusting and controlling the punching depth is arranged between the electric cylinder 33 and the punching needle 34, and a broken needle detection component 36 for detecting whether the punching needle 34 is broken is arranged on the electric cylinder 33. The electric cylinder 33 is started, and the punching needle 34 at the bottom is pushed vertically downward to punch holes in the refrigerator door liner on the loading platform 1, without manual punching, thereby improving the punching efficiency and avoiding the occurrence of uneven hole diameter caused by different manual punching depths.

[0040] The thickness of refrigerator door liners of different types and sizes is different. Therefore, when the electric cylinder 33 pushes the piercing needle 34 to pierce the hole, the thinner door liner may be pierced too deeply, resulting in damage to the door liner. Therefore, the device is provided with a depth adjustment component 35. Since the depth adjustment component 35 includes a sliding hole 351 opened in the free end of the electric cylinder 33, and a flexible spring 352 is installed on the top wall of the sliding hole 351, the other end of the flexible spring 352 is installed with a sliding rod 353 connected to the inner wall of the sliding hole 351 for sliding up and down, and the piercing needle 34 is installed at the bottom of the sliding rod 353, the top wall of the sliding hole 351 and the top of the sliding rod 353 are symmetrical An electric contact 354 is installed. When the electric cylinder 33 pushes the piercing needle 34 to move down to contact with the refrigerator door and pierce a hole, the reaction force of the contact between the two pushes the slide bar 353 to slide toward the inside of the slide hole 351 and squeeze the flexible spring 352 until the two electric contacts 354 contact and send out an electric signal. As the piercing needle 34 continues to move down to penetrate the surface of the refrigerator door and enter its interior, the flexible spring 352 is reset under its own elastic action, thereby disconnecting the two electric contacts 354 and stopping sending out electric signals. At this time, the electric cylinder 33 is controlled to stop moving down through the main control console, so that while completing the piercing, it can avoid moving down too deep, causing the door to be pierced.

[0041] Since the puncturing needle 34 may break after long-term puncturing use, thereby affecting the puncturing process, the device is also provided with a broken needle detection component 36, which includes a needle sleeve 361 installed at the free end of the electric cylinder 33 and located outside the puncturing needle 34, and a mounting groove 362 is provided at the bottom of the needle sleeve 361, and a pressure sensor 363 is installed in the mounting groove 362. If the puncturing needle 34 breaks, the puncturing needle 34 becomes shorter. At this time, when the broken puncturing needle 34 contacts the door bladder and pushes the sliding rod 353 upward, it will cause the pressure sensor 363 on the needle sleeve 361 to contact the surface of the door bladder. At this time, the pressure sensor 363 sends an electrical signal, and the staff at the main control console can detect that the puncturing needle 34 is broken and replace it in time.

[0042] Example 2

[0043] On the basis of Example 1, Figure 1-Figure 7 As shown, since the punching positions of refrigerator door liner of different types and sizes are different, the device is also provided with a distance adjusting mechanism 4, which includes a slide groove 41 opened on the right support frame 31, and the right ends of the two cross beams 32 are respectively slidably connected to the inside of the slide groove 41, and a bidirectional motor 42 is installed on the side of the right support frame 31, and the front and rear output ends of the bidirectional motor 42 are connected to the threaded rod 43, and the end of the threaded rod 43 is rotatably connected to the bearing 44 installed on the side of the right support frame 31, and the right end of the cross beam 32 is opened with a threaded hole 45 matching the threaded rod 43, and the threaded connection with the threaded rod 43 is through the threaded hole 45. When facing door liner of different sizes and widths, the bidirectional motor 42 is started to drive the threaded rod 43 to rotate inside the bearing 44, and then drive the cross beam 32 to move relative or opposite to each other inside the slide groove 41 through the bolt hole 483 at its right end, until the piercing needle 34 on the cross beam 32 moves to the top of the door liner of different sizes to perform the piercing work, thereby improving the application scope of the device.

[0044] A T-shaped slider 46 is installed at the left end of the beam 32, and a T-shaped slide groove 47 matching the T-shaped slider 46 is opened on the left support frame 31. An adjustment component 48 for adjusting the hole spacing is provided on the beam 32, and a centering component 49 for centering and fixing the refrigerator door liner is symmetrically installed on the front and rear sides of the loading platform 1. When the beam 32 moves back and forth inside the slide groove 41, the T-shaped slider 46 at the other end thereof is driven to slide back and forth inside the T-shaped slide groove 47, so that the movement of the beam 32 is more stable, which is more conducive to the adjustment and positioning work.

[0045] Since the puncturing spacing of different door liners is also different, the device is also provided with an adjusting component 48 for adjusting the spacing of the puncturing needles 34. The adjusting component 48 includes a strip hole 481 that penetrates through the cross beam 32, and a matching work frame 482 is installed on the strip hole 481, and the electric cylinder 33 is installed at the bottom of the work frame 482. Bolt holes 483 are arranged in an array on the front and rear sides of the work frame 482 and on the cross beam 32, and bolts 484 are connected to the inner threads of the bolt holes 483.

[0046] A length gauge is engraved on the side of the beam 32, and a handle 485 is installed on the work frame 482. When it is necessary to adjust the spacing of the piercing needles 34, the bolt 484 is unscrewed from the bolt hole 483, and then the handle 485 is pulled to drive the work frame 482 to move left and right along the strip hole 481 to adjust the spacing of the piercing needles 34 at the bottom thereof. The length gauge engraved on the beam 32 can be used to achieve precise adjustment of the spacing.

[0047] Since the refrigerator door liner may be skewed during the transportation through the conveyor belt 2, the accuracy cannot be controlled if it is adjusted manually. Therefore, the device is also provided with a centering component 49, which includes an electric push rod 491 installed on the loading platform 1, and the free end of the electric push rod 491 is installed with a push plate 492 for pushing and centering the refrigerator door liner on the conveyor belt 2. When one end of the refrigerator door liner abuts against the right support frame 31, the two electric push rods 491 are synchronously started to push the two push plates 492 to move relative to each other, thereby pushing the door liner to the center of the loading platform 1, completing the centering calibration, which is more conducive to the punching work.

[0048] It should be noted that, in this article, the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0049] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A refrigerator door liner punching device, comprising a conveyor belt (2) mounted on a loading platform (1) for conveying refrigerator door liner, characterized in that: The loading platform (1) is provided with a punching mechanism (3) for punching holes in the refrigerator door liner, and the punching mechanism (3) is provided with a distance adjustment mechanism (4) for adjusting the distance of punching holes in refrigerator door liner of different sizes; The piercing mechanism (3) comprises support frames (31) mounted on the left and right sides of the loading platform (1), and a crossbeam (32) is symmetrically mounted between the two support frames (31) in a front-to-back manner, an electric cylinder (33) is mounted at the bottom of the crossbeam (32), and a piercing needle (34) is mounted at the bottom free end of the electric cylinder (33), a depth adjustment component (35) for adjusting and controlling the piercing depth is arranged between the electric cylinder (33) and the piercing needle (34), and a broken needle detection component (36) for detecting whether the piercing needle (34) is broken is arranged on the electric cylinder (33).

2. A refrigerator door piercing device according to claim 1, characterized in that: The depth adjustment assembly (35) comprises a sliding hole (351) provided in the free end of the electric cylinder (33), and a flexible spring (352) is installed on the top wall of the sliding hole (351), and a sliding rod (353) connected to the inner wall of the sliding hole (351) for sliding up and down is installed on the other end of the flexible spring (352), and the piercing needle (34) is installed at the bottom of the sliding rod (353), and electric contacts (354) are symmetrically installed on the top wall of the sliding hole (351) and the top of the sliding rod (353).

3. A refrigerator door piercing device according to claim 1, characterized in that: The broken needle detection assembly (36) comprises a needle sleeve (361) mounted on the free end of the electric cylinder (33) and located outside the puncture needle head (34); a mounting groove (362) is provided at the bottom of the needle sleeve (361), and a pressure sensor (363) is installed in the mounting groove (362).

4. A refrigerator door piercing device according to claim 1, characterized in that: The distance adjustment mechanism (4) comprises a slide groove (41) provided on the right side support frame (31), and the right ends of the two cross beams (32) are respectively slidably connected to the inside of the slide groove (41), and a bidirectional motor (42) is installed on the side of the right side support frame (31), the front and rear output ends of the bidirectional motor (42) are connected to a threaded rod (43), and the end of the threaded rod (43) is rotatably connected to a bearing (44) installed on the side of the right side support frame (31), and the right end of the cross beam (32) is provided with a threaded hole (45) matching the threaded rod (43), and is threadedly connected to the threaded rod (43) through the threaded hole (45).

5. A refrigerator door piercing device according to claim 4, characterized in that: The left end of each crossbeam (32) is provided with a T-shaped slide block (46), and a T-shaped slide groove (47) matching the T-shaped slide block (46) is provided on the left support frame (31). An adjustment component (48) for adjusting the hole spacing is provided on the crossbeam (32), and a centering component (49) for centering and fixing the refrigerator door liner is symmetrically installed on the front and rear sides of the loading platform (1).

6. A refrigerator door piercing device according to claim 5, characterized in that: The adjustment assembly (48) includes a bar hole (481) extending through the cross beam (32), and a matching work frame (482) is mounted on the bar hole (481), and the electric cylinder (33) is mounted on the bottom of the work frame (482), and bolt holes (483) are arranged in an array on the front and rear sides of the work frame (482) and on the cross beam (32), and bolts (484) are connected to the inner threads of the bolt holes (483).

7. A refrigerator door piercing device according to claim 6, characterized in that: A length gauge is engraved on the side of the crossbeam (32), and a handle (485) is installed on the work frame (482).

8. The refrigerator door piercing device according to claim 5, characterized in that: The centering component (49) comprises an electric push rod (491) mounted on the loading platform (1), and a push plate (492) is mounted at the free end of the electric push rod (491) for pushing and centering the refrigerator door on the conveyor belt (2).

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