Fine adjustment mechanism for meshing clearance between gear and rack of cutting bed

Abstract

The utility model belongs to the technical field of cutting bed accessories, and relates to a fine adjustment mechanism for a gear and rack meshing clearance of a cutting bed, which comprises a bed body and a cross beam, racks are arranged on two sides of the bed body, cross beam driving components for driving the cross beam to slide are arranged on two sides of the cross beam, and each cross beam driving component comprises a driving seat, a power device and a gear. The power device is in transmission connection with the gear, the gear is in meshing transmission with the rack, a bearing seat capable of being rotationally adjusted is arranged in the driving seat, a bearing which supports the gear to rotate and is coaxial with the gear is arranged in the bearing seat, and a bearing seat positioning face matched with the driving seat is formed on the peripheral face of the bearing seat. A bearing positioning surface matched with a bearing is formed on the inner circumferential surface of the bearing seat, and the bearing seat positioning surface and the bearing positioning surface are eccentrically arranged. The fine adjustment mechanism for the meshing clearance of the gear and the rack of the cutting bed has the advantages of being compact in structure, simple and reliable.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of cutting bed accessories relates to a kind of fine adjustment mechanism for cutting bed gear rack meshing gap. BACKGROUND

[0002] The current beam, longitudinal beam of cutting bed mainstream transmission mode is gear rack transmission, the transmission mode is high in efficiency, fast, positioning accurate, and is widely used in cutting bed industry.But the error in the manufacturing process of cutting bed body is inevitable, leading to gear rack installation to bed after must adjust gear rack meshing gap to work normally, incorrect meshing gap will lead to gear rack wear aggravation, noise becomes larger, seriously affect the precision and life of transmission system.The existing adjustment mode is to adjust the gap by changing the assembly height of gear, and the adjustment structure is either very complex or the adjustment precision is not high.In view of the above situation, a compact, simple and reliable gear gap adjustment structure is developed, which is quite valuable. UTILIT Y MODEL CONTENT

[0003] The utility model provides a kind of fine adjustment mechanism for cutting bed gear rack meshing gap in view of the deficiency of prior art, with the advantages of compact structure, simple and reliable.

[0004] To solve the above technical problems, the purpose of the utility model is realized by the following technical scheme:

[0005] A kind of fine adjustment mechanism for cutting bed gear rack meshing gap, including bed body and beam, the both sides of the bed body are provided with rack, the both sides of the beam are provided with beam driving assembly for driving beam to slide, the beam driving assembly includes drive seat, power device and gear, the power device is connected with gear transmission, the gear is engaged with rack transmission, the drive seat is provided with bearing seat that can be adjusted rotation, bearing seat is provided with bearing in bearing seat, and the bearing is coaxial with gear and supports the rotation of gear, the outer circumferential surface of bearing seat forms bearing seat positioning surface matched with drive seat, the inner circumferential surface of bearing seat forms bearing positioning surface matched with bearing, and the bearing seat positioning surface and bearing positioning surface are eccentrically arranged.

[0006] In the above fine adjustment mechanism for cutting bed gear rack meshing gap, the bearing includes coaxially arranged first bearing and second bearing, the gear shaft of the gear is interference-fitted with the inner ring of the first bearing and the second bearing, and the outer ring of the first bearing and the second bearing is interference-fitted with the bearing seat.

[0007] In the above fine adjustment mechanism for cutting bed gear rack meshing gap, the gear and the gear shaft adopt a split structure, the gear and the gear shaft are coaxially arranged and fixedly connected by a plurality of axial fasteners.

[0008] In the above-mentioned fine adjustment mechanism for the gear rack meshing gap of a cutting machine, the middle part of the inner wall of the bearing seat is provided with an inner convex ring, the inner convex ring separates the bearing positioning surface into a first bearing positioning surface for assembling the first bearing and a second bearing positioning surface for assembling the second bearing, the two sides of the inner convex ring are respectively in abutting connection with the outer rings of the first bearing and the second bearing, the gear rotating shaft is sleeved with a limiting ring, and the two sides of the limiting ring are respectively in abutting connection with the inner rings of the first bearing and the second bearing.

[0009] In the above-mentioned fine adjustment mechanism for the gear rack meshing gap of a cutting machine, the first bearing and the second bearing have the same size specification, and the first bearing positioning surface and the second bearing positioning surface are located on the same positioning surface.

[0010] In the above-mentioned fine adjustment mechanism for the gear rack meshing gap of a cutting machine, the outer end of the bearing seat is provided with a flange coaxial with the bearing seat positioning surface, a plurality of flange mounting holes are uniformly arranged on the flange in the circumferential direction, the driving seat is provided with positioning mounting holes matched with the flange mounting holes, the flange mounting holes and the positioning mounting holes are fastened and connected through fasteners, and the included angle between adjacent angle adjustment mounting holes forms the smallest adjustable angle.

[0011] In the above-mentioned fine adjustment mechanism for the gear rack meshing gap of a cutting machine, the guide rail is arranged on the bed in parallel below the rack, and the sliding block is arranged on the bottom inner side of the driving seat and slides on the guide rail.

[0012] In the above-mentioned fine adjustment mechanism for the gear rack meshing gap of a cutting machine, the first pulley is sleeved on the power device, the second pulley is sleeved on the gear rotating shaft of the gear, the first pulley and the second pulley are in transmission connection through a synchronous belt, and the second pulley is coaxially arranged with the gear; further, the second pulley and the gear rotating shaft are in key connection; further, the flanges of the second pulley and the gear rotating shaft form the axial limiting structure of the bearing inner ring.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] 1. The utility model provides a fine adjustment mechanism for the gear rack meshing gap of a cutting machine, adopts eccentric bearing seat to adjust the meshing gap of gear rack, because the bearing seat positioning surface and the bearing positioning surface of eccentric bearing seat are not coaxial, when the installation angle of eccentric bearing seat is changed, the axis of bearing seat positioning surface does not change, but the axis of bearing positioning surface will have axial displacement, and then the bearing installed in the bearing seat and the gear axis supported by the bearing all have axial displacement, and when the gear axis displaces, the meshing gap of gear rack will change. Therefore, the utility model only needs to adjust the installation angle of eccentric bearing seat, and can adjust the meshing gap of gear rack, which is very convenient.

[0015] 2、The flange mounting hole on the eccentric bearing seat and the positioning mounting hole on the driving seat have a tolerance fit, and the eccentric bearing seat can be accurately positioned after assembly, thereby ensuring the stability and accuracy during adjustment of the gear and rack meshing gap.

[0016] 3、The eccentric bearing seat is used for adjusting the gear and rack meshing gap, and the rotational motion of the bearing seat can be converted into displacement of the gear shaft, when the bearing seat rotates by a large angle, only a small eccentric amount can be generated, thereby generating a small displacement of the gear shaft line, and the purpose of fine adjustment of the gear and rack meshing gap is achieved.

[0017] 4、The overall adjustment structure is compact, and the bearing seat has a very small back-off force after adjustment, and does not need an additional positioning device. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a perspective view of the utility model;

[0019] Figure 2 is an axial sectional view of Figure 1 ;

[0020] Figure 3 is a front view of the eccentric adjustment structure of the utility model;

[0021] Figure 4 is an axial sectional view of Figure 3 ;

[0022] Figure 5 is a front view of the bearing seat of the utility model;

[0023] Figure 6 is a perspective view of the bearing seat of the utility model;

[0024] Reference signs: 1, rack; 2, driving seat; 3, gear; 4, bearing seat; 5, bearing; 6, bearing seat positioning surface; 7, bearing positioning surface; 8, first bearing; 9, second bearing; 10, gear shaft; 11, inner convex ring; 12, first bearing positioning surface; 13, second bearing positioning surface; 14, limiting ring; 15, flange; 16, flange mounting hole; 17, positioning mounting hole; 18, guide rail; 19, sliding block; 20, first pulley; 21, second pulley; 22, synchronous belt. DETAILED DESCRIPTION

[0025] The utility model will be further described in combination with the drawings and specific embodiments, referring to Figures 1-6 :

[0026] A fine-tuning mechanism for the meshing clearance of the gear rack of a cutting machine comprises a bed and a beam, racks 1 are provided on both sides of the bed, beam drive assemblies for driving the beam to slide are provided on both sides of the beam, the beam drive assembly comprises a drive seat 2, a power device and a gear 3, the power device is connected to the gear 3 for transmission, the gear 3 is meshed with the rack 1 for transmission, a rotatable and adjustable bearing seat 4 is provided in the drive seat 2, a bearing 5 supporting the rotation of the gear 3 and coaxial with the gear 3 is provided in the bearing seat 4, the outer peripheral surface of the bearing seat 4 forms a bearing seat positioning surface 6 that cooperates with the drive seat 2, the inner peripheral surface of the bearing seat 4 forms a bearing positioning surface 7 that cooperates with the bearing 5, and the bearing seat positioning surface 6 and the bearing positioning surface 7 are eccentrically arranged.

[0027] Compare with Figure 1 and attached Figure 2 , the driving method of the gear 3 rack 1 in this embodiment is similar to that in the prior art: the power device (motor) is started, and the power device drives the gear 3 to rotate through the synchronous belt 22 transmission structure (for example, the synchronous belt transmission structure is: the power device is provided with a first pulley 20, and the gear shaft 10 of the gear 3 is provided with a second pulley 21, the first pulley 20 and the second pulley 21 are connected by a synchronous belt 22 transmission, the second pulley 21 is coaxially arranged with the gear 3, and the second pulley 21 is key-connected with the gear shaft 10), and the gear 3 on the other side is driven to rotate synchronously through the intermediate pulley and the intermediate pulley shaft. When the gear 3 rotates, it generates a displacement relative to the rack 1, thereby driving the drive seat 2 and the crossbeam to slide. The adjustment method of this embodiment is: rotate the bearing seat 4 in the driving seat 2 to change its installation angle. Since the position of the driving seat 2 remains unchanged during adjustment, the axis of the bearing seat positioning surface 6 remains unchanged when the bearing seat 4 rotates, but the eccentricity of the bearing positioning surface 7 relative to the bearing seat positioning surface 6 will change, causing the axis of the bearing positioning surface 7 to be displaced upward or downward. The displacement of the axis of the bearing positioning surface 7 will cause the axis of the bearing 5 and gear 3 assembled therewith to be displaced, and finally cause the gear 3 to be displaced upward or downward relative to the rack 1, thereby changing the meshing clearance of the gear 3 and the rack 1.

[0028] In this embodiment, the gear 3 and the gear shaft 10 adopt a split structure. The gear 3 and the gear shaft 10 are coaxially arranged and fixedly connected by a plurality of axial fasteners.

[0029] In order to better support the rotation of the gear 3, the bearing 5 includes a first bearing 8 and a second bearing 9 arranged coaxially. The gear shaft 10 of the gear 3 is interference fit with the inner rings of the first bearing 8 and the second bearing 9, and the outer rings of the first bearing 8 and the second bearing 9 are interference fit with the bearing seat 4.

[0030] Compare with Figure 3 and attached Figure 4The bearing 5 positioning structure of this embodiment is as follows: an inner convex ring 11 is provided in the middle of the inner wall of the bearing seat 4, and the inner convex ring 11 divides the bearing positioning surface 7 into a first bearing positioning surface 12 for assembling the first bearing 8 and a second bearing positioning surface 13 for assembling the second bearing 9. The two sides of the inner convex ring 11 are respectively in contact with the outer rings of the first bearing 8 and the second bearing 9. A limiting ring 14 is fitted on the gear shaft 10, and the two sides of the limiting ring 14 are respectively in contact with the inner rings of the first bearing 8 and the second bearing 9; the second pulley 21 and the flange of the gear shaft 10 form an axial limiting structure for the inner ring of the bearing 5.

[0031] Preferably, the first bearing 8 and the second bearing 9 have the same size specifications, and the first bearing positioning surface 12 and the second bearing positioning surface 13 are located on the same positioning surface.

[0032] Compare with Figure 3 To the attached Figure 6 The specific adjustment structure of the bearing seat 4 in this embodiment is as follows: the outer end of the bearing seat 4 is provided with a flange 15 coaxial with the bearing seat positioning surface 6, and a plurality of flange mounting holes 16 are evenly arranged on the flange 15 along the circumference. The drive seat 2 is provided with a positioning mounting hole 17 that cooperates with the flange mounting hole 16. The flange mounting hole 16 and the positioning mounting hole 17 are fastened together by fasteners, and the angle between adjacent angle adjustment mounting holes forms the smallest adjustable angle. The following is a typical adjustment method of this embodiment: According to the position of the bearing seat 4 shown in the accompanying drawings, the gear 3 and rack 1 have the largest meshing clearance at this time. During adjustment, first remove the fasteners, then rotate the bearing seat 4 90 degrees and reinstall the fasteners. At this time, the axis of the bearing positioning surface 7 produces a very small offset X, and the gear 3 produces a small displacement X toward the rack 1, so that the meshing clearance between the gear 3 and the rack 1 is reduced by X; if the bearing seat 4 is rotated 180 degrees and the fasteners are reinstalled, the axis of the bearing positioning surface 7 produces an offset 2X, and the gear 3 produces a displacement 2X toward the rack 1, so that the meshing clearance between the gear 3 and the rack 1 is reduced by 2X. At this time, the gear 3 and the rack 1 have the smallest meshing clearance.

[0033] A guide rail 18 is arranged parallel to the bed below the rack 1, and a slider 19 is arranged on the inner side of the bottom of the drive seat 2. The slider 19 slides on the guide rail 18. Through the cooperation between the slider 19 and the guide rail 18, the drive seat 2 and the crossbeam can slide stably along the bed.

[0034] The above embodiments are only preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. A fine-tuning mechanism for the meshing clearance of a gear rack of a cutting machine, comprising a bed and a beam, wherein racks (1) are provided on both sides of the bed, and beam drive assemblies for driving the beam to slide are provided on both sides of the beam, wherein the beam drive assembly comprises a drive seat (2), a power device and a gear (3), wherein the power device is in transmission connection with the gear (3), and the gear (3) is meshed with the rack (1) for transmission, and wherein the mechanism is characterized in that: A rotatably adjustable bearing seat (4) is provided in the driving seat (2); a bearing (5) supporting the rotation of the gear (3) and coaxial with the gear (3) is provided in the bearing seat (4); the outer peripheral surface of the bearing seat (4) forms a bearing seat positioning surface (6) cooperating with the driving seat (2); the inner peripheral surface of the bearing seat (4) forms a bearing positioning surface (7) cooperating with the bearing (5); the bearing seat positioning surface (6) and the bearing positioning surface (7) are eccentrically arranged.

2. A fine-tuning mechanism for the meshing clearance of a cutting machine gear rack according to claim 1, characterized in that: The bearing (5) includes a first bearing (8) and a second bearing (9) that are coaxially arranged; the gear shaft (10) of the gear (3) is interference-fitted with the inner rings of the first bearing (8) and the second bearing (9); and the outer rings of the first bearing (8) and the second bearing (9) are interference-fitted with the bearing seat (4).

3. The fine-tuning mechanism for the meshing clearance of the gear rack of a cutting machine according to claim 2, characterized in that: An inner convex ring (11) is provided in the middle of the inner wall of the bearing seat (4), and the inner convex ring (11) divides the bearing positioning surface (7) into a first bearing positioning surface (12) for assembling the first bearing (8) and a second bearing positioning surface (13) for assembling the second bearing (9). Both sides of the inner convex ring (11) are respectively in contact with the outer rings of the first bearing (8) and the second bearing (9). A limiting ring (14) is mounted on the gear shaft (10), and both sides of the limiting ring (14) are respectively in contact with the inner rings of the first bearing (8) and the second bearing (9).

4. The fine adjustment mechanism for the meshing clearance of the gear rack of a cutting machine according to claim 3, characterized in that: The first bearing (8) and the second bearing (9) have the same size specifications.

5. The fine-tuning mechanism for the meshing clearance of the gear rack of a cutting machine according to claim 1, characterized in that: The outer end of the bearing seat (4) is provided with a flange (15) coaxial with the bearing seat positioning surface (6), and a plurality of flange mounting holes (16) are evenly arranged on the flange (15) along the circumference. The driving seat (2) is provided with a positioning mounting hole (17) that matches the flange mounting hole (16), and the flange mounting hole (16) and the positioning mounting hole (17) are fastened together by fasteners.

6. The fine adjustment mechanism for the meshing clearance of the gear rack of a cutting machine according to claim 1, characterized in that: A guide rail (18) is arranged parallel to the bed below the rack (1), and a slider (19) is arranged on the inner side of the bottom of the driving seat (2), and the slider (19) slides on the guide rail (18).

7. The fine adjustment mechanism for the meshing clearance of the gear rack of a cutting machine according to claim 1, characterized in that: The power device is provided with a first pulley (20), and the gear shaft (10) of the gear (3) is provided with a second pulley (21). The first pulley (20) and the second pulley (21) are connected to each other through a synchronous belt (22), and the second pulley (21) is coaxially arranged with the gear (3).

Images