Gear shaft structure for woodworking machine tool

Abstract

The utility model discloses a gear shaft structure for a woodworking machine tool, which comprises a rotating shaft, a transmission gear is detachably arranged on the rotating shaft, the transmission gear comprises at least two gear single bodies which are mutually connected in parallel, and shaft holes which can be matched with the rotating shaft are arranged on the gear single bodies. Limiting parts used for limiting the gear single bodies to rotate around the rotating shaft and enabling the meshing parts of the gear single bodies to be axially aligned are arranged in the shaft holes, and locking pieces used for axially fastening the gear single bodies are arranged on the rotating shaft. A parallel connection type structure can be formed, when abrasion occurs, the gear single bodies can be independently replaced, and the maintenance cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of transmission components of woodworking machine tools, in particular to a gear shaft structure for woodworking machine tools. Background Art

[0002] At present, woodworking machine tools are mainly used for processing and manufacturing wooden products, and can perform processing operations such as sawing, planing, planing, seaming, grooving, cutting, drilling, punching, and knife sharpening; woodworking machine tools include action parts for realizing corresponding processing operations, and a driving mechanism for driving the action parts; a rotating shaft for outputting power and a transmission gear connected to the rotating shaft are provided on the driving mechanism, and the transmission gear is used for mutual meshing and transmission with a driven gear connected to the action parts in the woodworking machine tool; existing transmission gears generally adopt an integrated columnar gear structure, which needs to be replaced as a whole when worn, thereby increasing maintenance costs. Utility Model Content

[0003] The utility model aims to provide a gear shaft structure for a woodworking machine tool, which does not need to be replaced as a whole when a transmission gear is worn, thereby helping to reduce maintenance costs.

[0004] The purpose of the utility model is achieved through the following technical solutions:

[0005] A gear shaft structure for a woodworking machine tool comprises a rotating shaft, on which a transmission gear is detachably provided, the transmission gear comprising at least two gear monomers connected in parallel to each other, the gear monomers being provided with axial holes which can cooperate with the rotating shaft, the axial holes being provided with limiting portions for limiting the rotation of the gear monomers around the rotating shaft and axially aligning the meshing portions of each gear monomer, and the rotating shaft being provided with locking pieces for axially fastening the gear monomers.

[0006] On the basis of the above technical solution, the present invention can be improved as follows:

[0007] Furthermore, the rotating shaft includes a mounting portion for mounting the gear unit, and locking portions located at two axial ends of the mounting portion, and the locking element is arranged on the locking portion.

[0008] Furthermore, the diameter of the mounting portion of the rotating shaft is larger than the diameter of the locking portion.

[0009] Furthermore, the rotating shaft is provided with a limiting groove on the circumferential surface of the mounting portion, which can cooperate with the limiting portion in the shaft hole on the gear unit.

[0010] Furthermore, at least three limiting portions are provided in the shaft hole on the gear monomer, and the limiting portions are arranged at equal intervals along the inner wall of the shaft hole; at least three limiting grooves are provided on the mounting portion of the rotating shaft, and the limiting grooves are arranged at equal intervals along the circumference of the mounting portion of the rotating shaft, and the limiting portions correspond to the limiting grooves one by one.

[0011] Furthermore, the length of the mounting portion of the rotating shaft should be smaller than the axial length of the transmission gear formed by the parallel connection, so that the locking element can axially abut against the end surface of the transmission gear.

[0012] Furthermore, the locking member is a fastening nut, and the rotating shaft is threadedly connected to two of the fastening nuts on each locking portion and is configured with corresponding external threads.

[0013] Compared with the prior art, the utility model technology has the following advantages:

[0014] The utility model arranges at least two gear monomers on the rotating shaft and arranges a limiting portion in the axial hole of the gear monomer. The limiting portion limits the rotation of the gear monomer around the rotating shaft and axially aligns the meshing portions of each gear monomer to form a parallel structure. When wear occurs, the gear monomers can be replaced individually, reducing maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0016] Figure 1 It is a schematic diagram of the structure of the gear shaft structure for the utility model woodworking machine tool;

[0017] Figure 2 It is a schematic diagram of the utility model when the gear monomer is installed on the shaft mounting portion;

[0018] Figure 3 It is a schematic diagram of the structure of the installation part of the utility model rotating shaft;

[0019] Figure 4 It is a schematic diagram of the structure of the utility model gear monomer.

[0020] Markings on the accompanying drawings: 1-rotating shaft, 101-installing part, 101a-limiting groove, 102-locking part, 2-gear unit, 201-wheel part, 201a-axial hole, 201b-limiting part, 202-meshing part, 3-fastening nut. DETAILED DESCRIPTION

[0021] The following is a further description of the specific embodiments of the present invention in conjunction with the accompanying drawings. The description of these embodiments is used to help understand the present invention, but does not constitute a limitation of the present invention. In addition, the technical features involved in each embodiment of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0022] See also Figures 1 to 4 The utility model relates to a gear shaft structure for a woodworking machine tool, comprising a rotating shaft 1 and a transmission gear arranged on the rotating shaft 1, the transmission gear comprising at least two gear monomers 2 connected to each other along the axial direction of the rotating shaft 1; the gear monomer 2 has a circular wheel portion 201 and a meshing portion 202 arranged along the circumference of the wheel portion 201; the rotating shaft 1 has a mounting portion 101 and locking portions 102 located at both axial ends of the mounting portion 101.

[0023] The gear monomer 2 is detachably arranged on the rotating shaft 1, and an axial hole 201a is arranged in the middle of the wheel portion 201 of the gear monomer 2, and the gear monomer 2 is sleeved on the mounting portion 101 of the rotating shaft 1 through the axial hole 201a; the wheel portion 201 of the gear monomer 2 is provided with a limiting portion 201b on the inner wall of the axial hole 201a, and the limiting portion 201b is used to limit the rotation of the gear monomer 2 around the rotating shaft 1 after the sleeve is connected, and to axially align the meshing portions 202 of each gear monomer 2; the rotating shaft 1 is provided with a locking piece at the locking portion 102, and the locking piece is used to axially tighten the gear monomer 2, and to connect each gear monomer 2 to each other to form a columnar transmission gear.

[0024] In this embodiment, a plurality of gear monomers 2 are connected in parallel to form a cylindrical transmission gear. Compared with a single integrated cylindrical transmission gear in the prior art, the gear monomer 2 in this embodiment has a short axial length, which can avoid a large processing error caused by a long-distance forming feed of the meshing portion 202 by the processing equipment during the processing, and effectively improve the processing accuracy. Compared with an integrated cylindrical transmission gear that can only be processed by a hobbing device or a cutting device, since the gear monomer 2 in this embodiment has a short axial length, it can be suitable for powder metallurgy pressing and molding, which can not only ensure the processing accuracy, but also significantly improve the production efficiency, while reducing processing consumables, saving resources, and reducing production costs; the gear monomer 2 adopts a detachable structure, which can be replaced separately when wear occurs, reducing maintenance costs.

[0025] Specifically, the rotating shaft 1 is a stepped shaft structure, and the diameter of the mounting portion 101 of the rotating shaft 1 is larger than the diameter of the locking portion 102; the rotating shaft 1 is provided with a limiting groove 101a on the circumferential surface of the mounting portion 101, and the gear unit 2 is sleeved on the mounting portion 101 of the rotating shaft 1, and the limiting portion 201b in the axial hole 201a of the wheel portion 201 cooperates with the limiting groove 101a on the mounting portion 101 of the rotating shaft 1 to complete the limiting of the gear unit 2.

[0026] In the present embodiment, four limiting portions 201b are provided in the shaft hole 201a of the wheel portion 201, and the four limiting portions 201b are arranged at equal intervals along the inner wall of the shaft hole 201a; accordingly, in the present embodiment, four limiting grooves 101a are provided on the mounting portion 101 of the rotating shaft 1, and the four limiting grooves 101a are arranged at equal intervals along the circumferential surface of the mounting portion 101 of the rotating shaft 1; through the one-to-one correspondence between the four limiting portions 201b in the shaft hole 201a of the wheel portion 201 and the four limiting grooves 101a on the mounting portion 101 of the rotating shaft 1, four force points can be formed on the circumferential side of the rotating shaft 1 to limit the gear monomer 2 on the rotating shaft 1. The gear monomer 2 is coaxial with the rotating shaft 1 to achieve self-centering, ensure uniform force, effectively avoid unbalanced load on the gear monomer 2, and axially align the meshing portions 202 of each gear monomer 2, so as to ensure that the transmission gear can mesh with the driven gear connected to the action component for transmission, thereby improving transmission accuracy.

[0027] In this embodiment, the limiting groove 101a is an elongated groove structure, and the length direction of the limiting groove 101a is parallel to the axis of the rotating shaft 1. Openings connected to the limiting groove 101a are formed at both ends of the rotating shaft 1 mounting portion 101, so that the limiting portion 201b on the gear unit 2 can enter the limiting groove 101a from the opening to complete the limiting of the gear unit 2.

[0028] It should be noted that, in this embodiment, the number of limit grooves 101a on the rotating shaft 1 can be increased accordingly according to the number of limit parts 201b on the gear unit 2. In order to ensure the limitation and self-centering between the above-mentioned transmission gear and the rotating shaft 1, the number of limit grooves 101a on the rotating shaft 1 and the number of limit parts 201b on the gear unit 2 should be set to at least three respectively; at the same time, the length of the mounting portion 101 of the rotating shaft 1 should be less than the axial length of the transmission gear formed by the parallel connection, so as to ensure that the locking piece can abut the end face of the transmission gear to complete the locking.

[0029] In this embodiment, the limiting portion 201b on the gear monomer 2 is a wedge block, and the wedge block and the gear monomer 2 are integrally formed, one end of the wedge block is a connecting end and is connected to the inner wall of the axial hole 201a of the wheel portion 201 of the gear monomer 2, and the other end of the wedge block is a mating end and is away from the inner wall of the axial hole 201a of the wheel portion 201 of the gear monomer 2, the connecting end of the wedge block is larger than the mating end, and the two opposite side surfaces of the wedge block are inclined from the connecting end to the mating end; when the gear monomer 2 is sleeved on the mounting portion 101 of the rotating shaft 1, the wedge block on the wheel portion 201 of the gear monomer 2 is matched with the upper limiting groove 101a on the rotating shaft 1, and the cross-sectional shape of the limiting groove 101a corresponds to the cross-sectional shape of the wedge block.

[0030] The diameter of the shaft hole 201 a on the wheel portion 201 of the gear monomer 2 is larger than the diameter of the rotating shaft 1 . When the shaft hole 201 a on the wheel portion 201 of the gear monomer 2 is sleeved, a gap is formed between the shaft hole 201 a on the wheel portion 201 of the gear monomer 2 and the rotating shaft 1 .

[0031] In this embodiment, the locking member is a fastening nut 3. The rotating shaft 1 is threadedly connected to two fastening nuts 3 on each locking portion 102 and is provided with corresponding external threads. The fastening nuts 3 are locked in to axially fix and connect the formed transmission gear.

[0032] The above-mentioned embodiments of the utility model are not intended to limit the protection scope of the utility model, and the implementation methods of the utility model are not limited to these. All other various forms of modifications, replacements or changes made to the above-mentioned structure of the utility model based on the above-mentioned contents of the utility model, in accordance with the common technical knowledge and customary means in the field, without departing from the above-mentioned basic technical ideas of the utility model, should fall within the protection scope of the utility model.

Claims

1. A gear shaft structure for a woodworking machine tool, comprising a rotating shaft, on which a transmission gear is detachably provided, characterized in that: The transmission gear includes at least two gear monomers connected to each other, and the gear monomer is provided with an axial hole that can cooperate with the rotating shaft. The axial hole is provided with a limiting portion for limiting the rotation of the gear monomer around the rotating shaft and axially aligning the meshing portions of each gear monomer, and the rotating shaft is provided with a locking piece for axially fastening the gear monomer.

2. The gear shaft structure for a woodworking machine tool according to claim 1, characterized in that: The rotating shaft comprises a mounting portion for mounting a gear unit, and locking portions located at two axial ends of the mounting portion, and the locking element is arranged on the locking portion.

3. The gear shaft structure for a woodworking machine tool according to claim 2, characterized in that: The diameter of the mounting portion of the rotating shaft is greater than the diameter of the locking portion.

4. The gear shaft structure for a woodworking machine tool according to claim 2, characterized in that: The rotating shaft is provided with a limiting groove on the circumferential surface of the mounting portion, which can be matched with the limiting portion in the shaft hole on the gear monomer.

5. The gear shaft structure for a woodworking machine tool according to claim 4, characterized in that: There are at least three limiting parts in the shaft hole on the gear monomer, and the limiting parts are arranged at equal intervals along the inner wall of the shaft hole; there are at least three limiting grooves on the mounting part of the rotating shaft, and the limiting grooves are arranged at equal intervals along the circumference of the mounting part of the rotating shaft, and the limiting parts correspond to the limiting grooves one by one.

6. The gear shaft structure for a woodworking machine tool according to claim 4, characterized in that: The length of the mounting portion of the rotating shaft should be smaller than the axial length of the transmission gear formed by the parallel connection, so that the locking element can axially abut against the end surface of the transmission gear.

7. The gear shaft structure for a woodworking machine tool according to any one of claims 2 to 6, characterized in that: The locking member is a fastening nut, and the rotating shaft is threadedly connected to two of the fastening nuts on each locking portion and is configured with corresponding external threads.

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