Upper pressing roller for wet-process tank body

Abstract

The utility model discloses an upper pressing roller for a wet-process tank body. The upper pressing roller comprises an upper supporting wheel, an upper pressing wheel and an upper pressing positioning sleeve, wherein the upper supporting wheel is axially sleeved with the upper pressing wheel; the upper supporting wheel is fixedly sleeved with the upper pressing positioning sleeve which is used for limiting the two ends of the upper pressing wheel; and at least two upper pressing roller sleeves are distributed on each upper pressing roller in the axial direction and are sleeved with the upper pressing roller sleeves in the radial direction. According to the utility model, the rolling contact between the upper pressing roller sleeve and the upper surface of the silicon wafer can be realized, and the synchronism of the rolling contact between the upper pressing roller sleeve and the silicon wafer is improved; the wheel sleeve body of the upper pressing roller sleeve is made of the hard plastic material with excellent acid and alkali corrosion resistance, the silica gel layer with excellent acid and alkali corrosion resistance, abrasion resistance and high temperature resistance is compounded on the surface of the wheel sleeve body, and the silica gel layer is soft in material texture and not prone to scratching a product, so that the service life is prolonged, and the product percent of pass is increased.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaic cell wet process equipment, in particular to a wet process tank body upper pressing roller. Background Art

[0002] In the manufacture of crystalline silicon solar cells, the wet texturing process is to wet-etch the surface of the crystalline silicon wafer to form a surface velvet structure, reduce the reflectivity of the silicon wafer surface, and make the sunlight be emitted multiple times on the silicon wafer surface, thereby increasing the absorption of sunlight. The commonly used texturing method is to first etch the surface of the single-crystalline silicon wafer with alkaline solution to form a pyramid velvet structure, or to etch the surface of the multi-crystalline silicon wafer with acid to form a worm-like velvet structure.

[0003] At present, polycrystalline silicon solar cells use chain-type texturing equipment. Silicon wafers are transported by chain into the tank for cleaning and texturing. Since the silicon wafers are in a flat state on the chain conveyor equipment, an upper pressure roller is required to prevent the silicon wafers from floating during the processing.

[0004] The trough body pressure roller structure used in the prior art consists of a roller axis, a stop sleeve, a spur gear, a pressure roller, a movable roller positioning plate and a pressure roller sleeve. The movable roller positioning plate is used to limit the movable range of the pressure roller. The pressure roller contacts the product surface through the protruding arc structures at both ends to achieve the pressure effect, so that the product will not float during the processing process.

[0005] The material and weight of the pressure roller structure of the above-mentioned prior art easily cause scratches on the surface of the silicon wafer, and the overall comprehensive applicability and versatility are not high; and the pressure roller cover made of the existing material is too sensitive to environmental stress (chemical and mechanical effects) when used in a long-term high-temperature environment, is easy to deform, and has low mechanical rigidity, and has poor ability to recover after deformation, and is easy to loosen and scratch the product, affecting product efficiency and pass rate. Utility Model Content

[0006] In order to solve the above technical problems, the utility model provides a wet tank body upper pressing roller, comprising an upper supporting wheel, a supporting seat 1 and a supporting seat 2 respectively arranged at the axial ends of the upper supporting wheel, a plurality of upper pressing wheels axially spaced and movably sleeved on the upper supporting wheel, and an upper pressing positioning sleeve fixedly sleeved on the upper supporting wheel and used for limiting the positions of the two ends of the upper pressing wheel; each of the upper pressing wheels is axially distributed and radially sleeved with at least two upper pressing roller sleeves;

[0007] The radial outer ring of the upper pressure wheel is provided with a rolling groove, the radial inner ring of the upper pressure roller sleeve is provided with a ball groove and a ball is arranged in the ball groove, and the upper pressure roller sleeve is rotatably sleeved in the rolling groove of the upper pressure wheel through the ball arranged in the ball groove;

[0008] The upper pressure roller sleeve comprises a sleeve body with an inner ring made of hard plastic material, and a silicone layer compounded on the radial outer ring of the sleeve body.

[0009] Among them, the upper support wheel is provided with a positioning blind hole, and the upper pressure positioning sleeve is radially provided with a spring positioning pin corresponding to the positioning blind hole. The spring positioning pin cooperates with the positioning blind hole to realize the rapid disassembly and assembly of the upper pressure positioning sleeve.

[0010] Wherein, both radial ends of the upper pressing wheel are provided with slots, and the upper pressing positioning sleeve is radially provided with teeth corresponding to the slots, so that the limiting of both ends of the upper pressing wheel is achieved through the cooperation of the slots and the teeth.

[0011] There is a distance a between the axial end surface of the latch tooth and the axial bottom surface of the latch groove.

[0012] There is a distance b between the radial side surface of the latch tooth and the radial side surface of the latch groove.

[0013] Through the above technical solution, the upper pressure roller provided by the utility model has the following beneficial effects:

[0014] 1. It changes the conventional mode of the upper roller driving the upper pressure roller sleeve to roll in contact with the upper surface of the silicon wafer. The upper pressure roller sleeve is radially sleeved in the rolling groove of the upper pressure wheel through a ball structure, so that the upper pressure roller sleeve and the upper pressure wheel can rotate relative to each other to achieve rolling contact between the upper pressure roller sleeve and the upper surface of the silicon wafer, thereby eliminating the need for external power to rotate the upper support wheel and improving the synchronization of the rolling contact between the upper pressure roller sleeve and the silicon wafer;

[0015] 2. The wheel cover body of the upper pressure roller cover is made of hard plastic material with excellent acid and alkali corrosion resistance, and a layer of silicone layer with excellent acid and alkali corrosion resistance, wear resistance and high temperature resistance is compounded on the surface. The silicone layer material is soft and not easy to scratch the product, thereby improving the service life and product qualification rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following briefly introduces the drawings required for describing the embodiments.

[0017] Figure 1 This is a schematic diagram of the main structure of the upper pressure roller disclosed in the embodiment of the utility model;

[0018] Figure 2 It is a schematic diagram of the combined structure of the upper pressing wheel and the upper pressing positioning sleeve disclosed in the embodiment of the utility model;

[0019] Figure 3 This is a schematic diagram of the main structure of the upper pressure roller sleeve disclosed in the embodiment of the utility model;

[0020] Figure 4 for Figure 1 Schematic diagram of the enlarged structure of part A in the middle.

[0021] In the figure: 10. upper support wheel; 20. support seat 1; 30. upper pressure wheel; 31. slot; 32. rolling slot; 40. upper pressure positioning sleeve; 41. latch teeth; 42. spring positioning pin; 50. upper pressure roller sleeve; 51. wheel sleeve body; 52. silicone layer; 60. support seat 2. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0023] Embodiment 1:

[0024] refer to Figure 1-4 , a wet process tank body upper pressing roller provided in the present embodiment 1 comprises an upper supporting wheel 10, a supporting seat 1 20 and a supporting seat 2 60 respectively arranged at two axial ends of the upper supporting wheel 10, a plurality of upper pressing wheels 30 axially spaced and movably sleeved on the upper supporting wheel 10, and an upper pressing positioning sleeve 40 fixedly sleeved on the upper supporting wheel 10 and used for limiting the positions of the two ends of the upper pressing wheel 30; each upper pressing wheel 30 is axially distributed and radially sleeved with at least two upper pressing roller sleeves 50;

[0025] The radial outer ring of the upper pressing wheel 30 is provided with a rolling groove 32, the radial inner ring of the upper pressing roller sleeve 50 is provided with a ball groove and a ball is arranged in the ball groove, and the upper pressing roller sleeve 50 is arranged in the rolling groove 32 of the upper pressing wheel 30 through the ball arranged in the ball groove.

[0026] The upper pressing roller cover 50 includes a cover body 51 with an inner ring made of hard plastic material, and a silicone layer 52 compounded on the radial outer ring of the cover body 51 .

[0027] The upper pressure roller provided in the present embodiment 1 changes the mode in which the conventional upper roller drives the upper pressure roller sleeve to roll in contact with the upper surface of the silicon wafer. The upper pressure roller sleeve 50 is radially sleeved in the rolling groove of the upper pressure wheel 30 through a ball structure, so that the upper pressure roller sleeve 50 and the upper pressure wheel 30 can rotate relative to each other to achieve the rolling contact between the upper pressure roller sleeve 50 and the upper surface of the silicon wafer, thereby eliminating the need for external power to rotate the upper support wheel 10 and improving the synchronization of the rolling contact between the upper pressure roller sleeve 50 and the silicon wafer; the wheel sleeve body 51 of the upper pressure roller sleeve 50 is made of a hard plastic material with excellent acid and alkali corrosion resistance, and is composited on the surface with a silicone layer 52 with excellent acid and alkali corrosion resistance, wear resistance and high temperature resistance, and the silicone layer 52 is soft in texture and not easy to scratch the product, thereby improving the service life and product qualification rate.

[0028] Embodiment 2:

[0029] Based on Example 1, in this Example 2, the upper support wheel 10 is provided with a positioning blind hole, and the upper pressure positioning sleeve 40 is radially provided with a spring positioning pin 42 corresponding to the positioning blind hole. Through the cooperation between the spring positioning pin 42 and the positioning blind hole, the upper pressure positioning sleeve 40 can be quickly disassembled and assembled for easy maintenance or replacement.

[0030] Embodiment 3:

[0031] Based on the first or second embodiment, in the third embodiment, the upper pressing wheel 30 is provided with a slot 31 at both radial ends, and the upper pressing and positioning sleeve 40 is provided with a tooth 41 corresponding to the slot 31 in the radial direction, so that the two ends of the upper pressing wheel 30 are limited by the cooperation between the slot 31 and the tooth 41. There is a spacing a between the axial end surface of the tooth 41 and the axial bottom surface of the slot 31, and there is a spacing b between the radial side surface of the tooth 41 and the radial side surface of the slot 31.

[0032] In this embodiment 3, the two ends of the upper pressure wheel 30 are limited by the structure of the slot 31 and the tooth 41, and the axial and radial reserved spacing between the tooth 41 and the slot 31 can ensure that there is a certain floating space between the upper pressure roller sleeve 50 and the silicon wafer, thereby reducing the possibility of crushing the silicon wafer and improving the product qualification rate.

[0033] The working principle of this utility model:

[0034] First, according to the design requirements, a corresponding number of upper pressing wheels 30 are sleeved on the upper supporting wheel 10, and the spring positioning pins 42 of the upper pressing positioning sleeve 40 cooperate with the positioning blind holes of the upper supporting wheel 10 to limit the corresponding ends of the upper pressing wheels 30;

[0035] Then, the installed upper pressure roller is installed on the wet process tank body through the support seat 1 20 and the support seat 2 60 at both ends for standby use;

[0036] Finally, during operation, when the silicon wafers pass through the wet process tank body in sequence driven by the sprocket, rolling contact and pressing are achieved through at least two upper pressure roller sleeves 50 corresponding to each silicon wafer, and a certain floating space between the upper pressure roller sleeve 50 and the silicon wafer is used to reduce the possibility of crushing the silicon wafer.

[0037] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to the above embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A wet process tank body upper pressing roller, characterized in that: The invention comprises an upper support wheel (10), a support seat 1 (20) and a support seat 2 (60) respectively arranged at two axial ends of the upper support wheel (10), a plurality of upper pressing wheels (30) axially spaced and movably sleeved on the upper support wheel (10), and an upper pressing positioning sleeve (40) fixedly sleeved on the upper support wheel (10) and used for limiting the positions of the two ends of the upper pressing wheel (30); each of the upper pressing wheels (30) is axially distributed and radially sleeved with at least two upper pressing roller sleeves (50); The radial outer ring of the upper pressure wheel (30) is provided with a rolling groove (32), the radial inner ring of the upper pressure roller sleeve (50) is provided with a ball groove and a ball is arranged in the ball groove, and the upper pressure roller sleeve (50) is rotatably sleeved in the rolling groove (32) of the upper pressure wheel (30) through the ball arranged in the ball groove; The upper pressure roller sleeve (50) comprises a sleeve body (51) with an inner ring made of hard plastic material, and a silicone layer (52) compounded on the radial outer ring of the sleeve body (51).

2. The wet process tank body pressing roller according to claim 1, characterized in that: The upper support wheel (10) is provided with a positioning blind hole, and the upper pressure positioning sleeve (40) is radially provided with a spring positioning pin (42) corresponding to the positioning blind hole, and the spring positioning pin (42) cooperates with the positioning blind hole to achieve rapid disassembly and assembly of the upper pressure positioning sleeve (40).

3. The wet process tank body pressing roller according to claim 1, characterized in that: The upper pressing wheel (30) is provided with slots (31) at both radial ends, and the upper pressing positioning sleeve (40) is provided with latch teeth (41) corresponding to the slots (31) at the radial end, so that the two ends of the upper pressing wheel (30) are limited by the cooperation between the slots (31) and the latch teeth (41).

4. The wet process tank body pressing roller according to claim 3, characterized in that: There is a distance a between the axial end surface of the latching tooth (41) and the axial bottom surface of the latching groove (31).

5. The wet process tank body pressing roller according to claim 4, characterized in that: There is a distance b between the radial side surface of the latching tooth (41) and the radial side surface of the latching groove (31).

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