A thermoplastic polyurethane elastomer doffing wheel

Abstract

The present invention proposes a thermoplastic polyurethane elastomer doffing wheel, comprising a wheel body, doffing protrusions and a middle hole, wherein the wheel body is equipped with doffing protrusions, wherein the doffing protrusions are greater than ten and are equidistantly arranged around the wheel body, and a middle hole is provided in the wheel body, wherein the middle hole is concentric with the wheel body. The thermoplastic polyurethane elastomer doffing wheel is made of a mixed raw material of glass fiber and nylon, and the weight of the doffing wheel is reduced compared with an iron plate. In addition, the doffing wheel is installed on a doffing column, which can reduce power loss and solve electricity costs, and protect the double-sided self-locking structure and perforation design, so as to wrap the wheel body firmly; while the doffing protrusions wrap the wheel body on both sides, the wedge plate 1 and the wedge plate 2 are connected together by the locking block penetrating the perforation to form a firm integrated structure; the doffing protrusions and the wheel body are injection molded, and are not easy to peel off during cotton picking, thereby increasing the service life.

Description

Technical Field

[0001] The invention relates to the technical field of doffing wheel processing, in particular to a thermoplastic polyurethane elastomer doffing wheel. Background Art

[0002] The doffer wheel is a doffer component provided on the cotton receiving unit. In order to remove the cotton entangled on the spindle, the cotton harvesting unit usually includes an adjustable doffer column with multiple doffer wheels. The doffer wheels usually rotate at a tangential speed greater than the tangential speed of the spindle. When the spindle and the doffer wheel move relative to each other, the cotton is untied and stripped from the spindle.

[0003] At present, the body of the doffer disk in the doffer machine is mostly a metal ring, and the doffer teeth on the doffer disk are 12 serrated shapes made of CPU material. The doffer teeth are installed on the iron core frame (the body of the cotton disk) by assembly, or are glued to the iron core frame (the body of the cotton disk); the invention with publication number CN 111264189A discloses an assembled doffer disk for a cotton picker. When the doffer teeth are worn out and fail, only new doffer teeth need to be replaced without replacing the entire doffer disk, thereby reducing the maintenance cost of the cotton picker.

[0004] However, the following problems still exist during implementation: 1. The cotton-docking teeth are glued to the iron core frame (the body of the cotton disc), and the continuous friction and shearing by external force during cotton picking can easily cause partial peeling; 2. The materials of the CPU cotton-docking teeth and the iron core frame (the body of the cotton disc) are not compatible and do not blend, and there is a repulsive force; 3. The cotton-docking teeth and the iron core (the body of the cotton disc) frame are wrapped by assembly or gluing, and the shear resistance is not strong, and it is easy to peel off; 4. The cotton-docking teeth on the cotton-docking wheel in this document can be replaced after wear. Replacement, but the replacement of the doffer teeth is a newer part compared to other doffer teeth on the doffer wheel. The combination of old and new parts will cause unstable cotton doffer. 5. In addition, the current doffer wheels are mostly made of plastic doffer teeth wrapped in iron discs. The body is relatively heavy, and the assembly on the doffer column increases the power loss of the doffer column. The processing process of the cotton supporting wheel made of iron discs has many procedures and cumbersome steps. The product size and quality are difficult to control. It must be cut and processed to a unified size before it can be used. Summary of the invention

[0005] The present invention provides a thermoplastic polyurethane elastomer doffing wheel, which solves the problems mentioned in the above background technology.

[0006] The technical solution of the present invention is achieved in this way:

[0007] A thermoplastic polyurethane elastomer doffing wheel, comprising a wheel body, doffing bumps and a middle hole, wherein the wheel body is equipped with doffing bumps, the number of the doffing bumps is greater than ten and the doffing bumps are equidistantly arranged around the wheel body, and the wheel body is provided with a middle hole, which is concentric with the wheel body;

[0008] The cotton removal convex block includes a convex block body located outside the wheel body, a wedge plate 1 is fixed on the side of the convex block body close to the wheel body, a locking block penetrating the wheel body is fixed on the side of the wedge plate 1 away from the convex block body, a wedge plate 2 located on the other side of the wheel body is fixed on the side of the locking block away from the wedge plate 1, and the wedge plate 1 and the wedge plate 2 are respectively positioned on both sides of the wheel body;

[0009] The protrusion body, the first wedging plate, the locking block and the second wedging plate are an integrated structure.

[0010] Furthermore, the number of locking blocks in each of the doffing protrusions is greater than six and not less than eight.

[0011] Furthermore, the wheel body is provided with a through hole, and the through hole can accommodate the locking block.

[0012] Furthermore, wedging grooves are respectively provided on both sides of the wheel body, and the heights of the wedging plate 1 and the wedging plate 2 are consistent with the depths of the wedging grooves.

[0013] Furthermore, the wheel body is made of engineering plastic hard glue composed of glass fiber and nylon, and the cotton removal protrusion is made of TPU polyurethane soft glue.

[0014] Beneficial effects of the technical solution provided by this application:

[0015] 1. Thermoplastic polyurethane elastomer doffing wheel is formed by two structures: wheel body and doffing convex block. The doffing convex block is integrally formed and wrapped on the wheel body, and will not get loose or shake. The two are tightly held to each other, with strong stability. No subsequent disassembly is required, reducing the tediousness of maintenance.

[0016] 2. The thermoplastic polyurethane elastomer doffing wheel has a locking block on the doffing protrusion that passes through the through-hole on the wheel body. A plurality of locking blocks and a plurality of through-holes are combined together in correspondence to each other, thereby increasing the locking strength and making the doffing protrusion more anti-dropping. The wedge plates 1 and 2 on the doffing protrusion are respectively filled in the wedging grooves on both sides of the wheel body. The sizes of the wedging grooves and the wedging plates correspond to each other, so that the wheel body and the doffing protrusion fit each other, and the fastening effect of the connection is stronger. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 A three-dimensional schematic diagram of the present invention;

[0019] Figure 2 It is a three-dimensional schematic diagram of the wheel body of the present invention;

[0020] Figure 3 It is a partial three-dimensional schematic diagram of the cotton removal protrusion of the present invention;

[0021] Figure 4 It is a schematic top view of the wheel body of the present invention;

[0022] Figure 5 For the present invention Figure 4 The enlarged schematic diagram of the longitudinal section at position Ⅰ in the middle;

[0023] Figure 6 It is a top view schematic diagram of the wheel body and the doffing convex block of the present invention;

[0024] Figure 7 For the present invention Figure 6 Enlarged schematic diagram of the longitudinal section at middle II;

[0025] Figure 8 It is a schematic diagram of the process of the processing method of the present invention.

[0026] In the figure: 1 wheel body, 2 cotton removal projection, 3 middle hole, 4 projection body, 5 wedging plate 1, 6 locking block, 7 wedging plate 2. DETAILED DESCRIPTION

[0027] The technical solution of the present invention will be clearly and completely described below in conjunction with 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.

[0028] Embodiment 1:

[0029] A novel cotton harvester doffing wheel comprises a wheel body 1, doffing convex blocks 2 and a middle hole 3. The wheel body 1 is equipped with doffing convex blocks 2, the number of doffing convex blocks 2 is greater than ten and the number of doffing convex blocks 2 is equidistantly surrounding the wheel body 1. The wheel body 1 is provided with a middle hole 3, and the middle hole 3 is concentric with the wheel body 1.

[0030] The shape of the middle hole 3 can be circular, oval, irregular, star-shaped, polygonal, or patterned, and the number of the middle holes 3 can be 1-999. The cotton removal protrusion 2 is integrally formed and wrapped on the wheel body 1. The cotton removal protrusion 2 is connected to the wheel body 1 as a whole, and they are locked and tightly held together without shaking or loosening.

[0031] The cotton-dousing protrusion 2 includes a protrusion body 4 located outside the wheel body 1, which is a main component in the cotton-dousing operation. After being connected to the wheel body 1, it will not loosen during the cotton-dousing operation. A wedge plate 5 is fixed to the side of the protrusion body 4 close to the wheel body 1, and a locking block 6 that penetrates the wheel body 1 is fixed to the side of the wedge plate 5 away from the protrusion body 4. A wedge plate 2 7 located on the other side of the wheel body 1 is fixed to the side of the locking block 6 away from the wedge plate 5. The wedge plate 1 5 and the wedge plate 2 7 are respectively positioned on both sides of the wheel body 1, and the wedge plate 1 5 and the wedge plate 2 7 cooperate with the locking block 6 to form an I-shaped design. The wedge plate 1 5 and the wedge plate 2 7 respectively hold the two sides of the wheel body 1, and the locking block 6 serves as the connection basis of the wedge plate 1 5 and the wedge plate 2 7 to limit the wedge plate 1 5 and the wedge plate 2 7 on the wheel body 1, so that the cotton-dousing protrusion 2 has a strong locking ability.

[0032] Furthermore, the number of the locking blocks 6 in each doffing protrusion 2 is greater than six and not less than eight, and the connection between the multiple locking blocks 6 and the wheel body 1 increases the gripping strength of the doffing protrusion 2.

[0033] In this embodiment, the block body 4, the wedging plate 1 5, the locking block 6 and the wedging plate 2 7 are an integrated structure. The integrated molding enables the various components on the doffing block 2 to cooperate with each other and be locked on the wheel body 1, and there is no need to replace the doffing block 2.

[0034] The wheel body 1 is provided with a through hole, which can accommodate the locking block 6 . The through hole provides a through space for the locking block 6 , so that the locking block 6 can limit the wedging plate 1 5 and the wedging plate 2 7 on the wheel body 1 .

[0035] exist Figure 2 , Figure 3 and Figure 4 In the embodiment, wedging grooves are respectively provided on both sides of the wheel body 1, and the heights of the wedging plates 1 5 and 2 7 are consistent with the depths of the wedging grooves. After installation, the wedging plates 2 7 can make the cotton removal cam 2 flush with the other side of the wheel body 1 without generating any bulges.

[0036] Furthermore, the wheel body 1 is made of engineering plastic hard glue composed of glass fiber and nylon, and the cotton removal protrusion 2 is made of TPU polyurethane soft glue.

[0037] A method for processing a thermoplastic polyurethane elastomer doffing wheel comprises the following steps:

[0038] 1) Injection molding the heated glass fiber and nylon mixed raw materials in a skeleton mold to obtain a skeleton structure semi-finished product, and a space for secondary injection molding is reserved in the skeleton structure semi-finished product;

[0039] 2) cooling the semi-finished skeleton structure in step 2;

[0040] 3) Place the cooled skeleton structure semi-finished product into the secondary processed TPU mold, and perform a second injection molding on the heated TPU raw material from the injection point of the skeleton structure semi-finished product. The TPU raw material is injected through the injection point to pass through the secondary injection space. The TPU raw material is filled in the secondary injection space to obtain a finished cotton removal wheel structure wrapped with the TPU raw material.

[0041] In this embodiment, the glue injection point in step 3 corresponds to the wedging groove outside the second wedging plate 7.

[0042] At the same time, the space for secondary injection molding in step 1 corresponds to the perforation outside the locking block 6 .

[0043] During implementation, the semi-finished skeleton structure is the wheel body 1 .

[0044] In this embodiment, the cotton doffing wheel is processed by injection molding with a precision injection molding machine. Through two working steps, the size of the product can be controlled within the range of ±0.1, which is suitable for direct use on the machine. The production cost is greatly reduced, and the difficulties of various processes such as blanking, stamping, rust removal and gluing required for existing iron plate processing are overcome, thereby improving production efficiency. The cotton doffing wheel is made of a mixed raw material of glass fiber and nylon, which reduces the weight of the cotton doffing wheel compared to the iron plate. In addition, the cotton doffing wheel installed on the cotton doffing column can reduce power loss and solve the electricity cost compared to the iron plate installed on the cotton doffing column.

[0045] Embodiment 2:

[0046] A novel cotton harvester doffing wheel comprises a wheel body 1, doffing convex blocks 2 and a middle hole 3. The wheel body 1 is equipped with doffing convex blocks 2, the number of doffing convex blocks 2 is greater than ten and the number of doffing convex blocks 2 is equidistantly surrounding the wheel body 1. The wheel body 1 is provided with a middle hole 3, and the middle hole 3 is concentric with the wheel body 1.

[0047] The shape of the middle hole 3 can be circular, oval, irregular, star-shaped, polygonal, or patterned, and the number of the middle holes 3 can be 1-999. The cotton removal protrusion 2 is integrally formed and wrapped on the wheel body 1. The cotton removal protrusion 2 is connected to the wheel body 1 as a whole, and they are locked and tightly held together without shaking or loosening.

[0048] The cotton-dousing protrusion 2 includes a protrusion body 4 located outside the wheel body 1, which is a main component in the cotton-dousing operation. After being connected to the wheel body 1, it will not loosen during the cotton-dousing operation. A wedge plate 5 is fixed to the side of the protrusion body 4 close to the wheel body 1, and a locking block 6 that penetrates the wheel body 1 is fixed to the side of the wedge plate 5 away from the protrusion body 4. A wedge plate 2 7 located on the other side of the wheel body 1 is fixed to the side of the locking block 6 away from the wedge plate 5. The wedge plate 1 5 and the wedge plate 2 7 are respectively positioned on both sides of the wheel body 1, and the wedge plate 1 5 and the wedge plate 2 7 cooperate with the locking block 6 to form an I-shaped design. The wedge plate 1 5 and the wedge plate 2 7 respectively hold the two sides of the wheel body 1, and the locking block 6 serves as the connection basis of the wedge plate 1 5 and the wedge plate 2 7 to limit the wedge plate 1 5 and the wedge plate 2 7 on the wheel body 1, so that the cotton-dousing protrusion 2 has a strong locking ability.

[0049] Furthermore, the number of the locking blocks 6 in each doffing protrusion 2 is greater than six and not less than eight, and the connection between the multiple locking blocks 6 and the wheel body 1 increases the gripping strength of the doffing protrusion 2.

[0050] In this embodiment, the block body 4, the wedging plate 1 5, the locking block 6 and the wedging plate 2 7 are an integrated structure. The integrated molding enables the various components on the doffing block 2 to cooperate with each other and be locked on the wheel body 1, and there is no need to replace the doffing block 2.

[0051] The wheel body 1 is provided with a through hole, which can accommodate the locking block 6 . The through hole provides a through space for the locking block 6 , so that the locking block 6 can limit the wedging plate 1 5 and the wedging plate 2 7 on the wheel body 1 .

[0052] exist Figure 2 , Figure 3 and Figure 4 In the embodiment, wedging grooves are respectively provided on both sides of the wheel body 1, and the heights of the wedging plates 1 5 and 2 7 are consistent with the depths of the wedging grooves. After installation, the wedging plates 2 7 can make the cotton removal cam 2 flush with the other side of the wheel body 1 without generating any bulges.

[0053] Furthermore, the wheel body 1 is made of engineering plastic hard glue composed of glass fiber and nylon, and the cotton doffing protrusion 2 is made of TPU polyurethane soft glue. The materials of the wheel body 1 and the cotton doffing protrusion 2 can be a combination of metal and engineering plastic, or a combination of engineering plastic and engineering plastic. The cotton doffing cams 2 on the wheel body 1 can be separated, connected on one side, or connected on both sides.

[0054] A method for processing a thermoplastic polyurethane elastomer doffing wheel comprises the following steps:

[0055] 1) Injection molding the heated glass fiber and nylon mixed raw materials in a skeleton mold to obtain a skeleton structure semi-finished product, and a space for secondary injection molding is reserved in the skeleton structure semi-finished product;

[0056] 2) cooling the semi-finished skeleton structure in step 2;

[0057] 3) Place the cooled skeleton structure semi-finished product into the secondary processed TPU mold, and perform a second injection molding on the heated TPU raw material from the injection point of the skeleton structure semi-finished product. The TPU raw material is injected through the injection point to pass through the secondary injection space. The TPU raw material is filled in the secondary injection space to obtain a finished cotton removal wheel structure wrapped with the TPU raw material.

[0058] In this embodiment, the glue injection point in step 3 corresponds to the wedging groove outside the second wedging plate 7.

[0059] At the same time, the space for secondary injection molding in step 1 corresponds to the perforation outside the locking block 6 .

[0060] During implementation, the semi-finished skeleton structure is a wheel body 1

[0061] The TPU raw material of the process method in this embodiment is thermoplastic plastic, which is 100% recyclable and environmentally friendly. The doffing wheel body is formed by one-time injection molding, and the doffing wheel with the head doffing protrusion 2 is formed by secondary injection molding. The processing cost is low and it can be used directly without surface treatment. The doffing protrusion 2 is combined with the wheel body 1 to form a double-sided self-locking structure. The doffing protrusion 2 firmly locks the wheel body 1 to form a whole.

[0062] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A thermoplastic polyurethane elastomer doffing wheel, comprising a wheel body (1), doffing convex blocks (2) and a middle hole (3), wherein the wheel body (1) is equipped with doffing convex blocks (2), the number of the doffing convex blocks (2) being greater than ten and being equidistantly arranged around the wheel body (1), the wheel body (1) being provided with a middle hole (3), the middle hole (3) being concentric with the wheel body (1), and characterized in that: The cotton removal convex block (2) comprises a convex block body (4) located outside the wheel body (1); a wedge plate 1 (5) is fixed on a side of the convex block body (4) close to the wheel body (1); a locking block (6) penetrating the wheel body (1) is fixed on a side of the wedge plate 1 (5) away from the convex block body (4); a wedge plate 2 (7) located on the other side of the wheel body (1) is fixed on a side of the locking block (6) away from the wedge plate 1 (5); the wedge plate 1 (5) and the wedge plate 2 (7) are respectively positioned on two sides of the wheel body (1); The protruding block body (4), the first wedging plate (5), the locking block (6) and the second wedging plate (7) are an integrated structure.

2. A thermoplastic polyurethane elastomer doffing wheel as claimed in claim 1, characterized in that: The number of the locking blocks (6) in each of the doffing protrusions (2) is greater than six and not less than eight.

3. A thermoplastic polyurethane elastomer doffing wheel as claimed in claim 1, characterized in that: The wheel body (1) is provided with a through hole, and the doffing convex block (2) is injection-molded through the through hole to wrap around the wheel body (1).

4. A thermoplastic polyurethane elastomer doffing wheel as claimed in claim 1, characterized in that: The wheel body (1) is provided with wedging grooves on both sides, and the heights of the wedging plate 1 (5) and the wedging plate 2 (7) are consistent with the depths of the wedging grooves.

5. A thermoplastic polyurethane elastomer doffing wheel as claimed in claim 1, characterized in that: The material of the wheel body (1) is engineering plastic hard glue composed of glass fiber and nylon, and the material of the cotton removal protrusion (2) is TPU polyurethane soft glue.

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