Stable guide structure for rack and gear meshing

Abstract

The utility model discloses a stable guide structure for rack and gear meshing, which comprises a casing and a gear rotatably arranged in the casing, and is characterized in that a guide wheel is rotatably arranged on one side of the casing, an air cylinder is arranged on one side of the casing, a driving shaft of the air cylinder is provided with a rack meshed with the gear, and the rack is connected with the gear. A guide groove is concavely formed in the side, away from the gear, of the rack in the length direction, and the contour face of the guide wheel abuts against the bottom wall of the guide groove. The gear and the guide wheel are matched to form a connecting state for clamping the rack, the rack and the gear are kept in an engaged transmission state at the moment, and then stable transmission of the rack and the gear is kept; therefore, the trouble of measurement is effectively avoided, and the installation direction of the slide rail is not limited.

Description

Technical Field

[0001] The utility model particularly relates to a stable guiding structure for rack and gear meshing. Background Art

[0002] Rack and pinion transmission is a common transmission part at present. This form of transmission has many advantages. It has a longer stroke because the rack can be used to connect other external objects that require linear displacement according to needs. However, it also has many disadvantages in many cases because the stability of this form requires higher meshing accuracy of the rack and pinion and linear guide accuracy of the rack.

[0003] At present, a slide rail slider is generally used for the linear guidance of the rack. The rack is installed on the slider to guide the rack along the axial movement of the slide rail. However, in the above method, it is necessary to use measuring tools to adjust objects such as straightness and parallelism during installation. The measurement process is cumbersome and wastes time. In addition, a longer slide rail requires a higher cost, which cannot meet the usage requirements. Utility Model Content

[0004] In view of the defects of the above-mentioned prior art, the technical problem to be solved by the utility model is: to provide a stable guiding structure for the meshing of rack and pinion.

[0005] A stable guiding structure for the meshing of a rack and a gear, comprising a casing, a gear rotatably arranged inside the casing, a guide wheel rotatably arranged on one side of the casing, a cylinder arranged on one side of the casing, a drive shaft of the cylinder provided with a rack meshing with the gear, a guide groove concave inwardly along the length direction on the side of the rack away from the gear, and the contour surface of the guide wheel abuts against the bottom wall of the guide groove.

[0006] In one embodiment, a first connecting shaft is connected to one side of the housing, the guide wheel is placed on the first connecting shaft through a bearing sleeve, and a first retaining spring is provided on the first connecting shaft and below the guide wheel.

[0007] In one embodiment, a first tight lift piece is threadedly connected to one side of the housing, and one end of the first tight lift piece is pressed against one side of the first connecting shaft.

[0008] In one embodiment, the first tightening member is an external hexagonal bolt.

[0009] In one embodiment, a first screw hole is provided at one end of the first connecting shaft, and a connecting screw threadably matched with the first screw hole is inserted into the housing.

[0010] In one embodiment, a side surface of the first connecting shaft that contacts the first tightening member is a plane.

[0011] In one embodiment, a second connecting shaft is rotatably connected to the housing via a bearing, and the gear is detachably connected to the second connecting shaft.

[0012] In one embodiment, the gear is annular in shape and is sleeved on a second connecting shaft. Second retaining springs are respectively arranged on the second connecting shaft and on the upper and lower sides of the gear. A second screw hole is penetrated through one side of the gear. The inner thread of the second screw hole is fitted with a second tightening piece which is tightly connected to the side wall of the second connecting shaft.

[0013] In one embodiment, the upper end of the second connecting shaft protrudes outward from the outer side of the casing.

[0014] In one embodiment, holes are symmetrically provided on both sides of the housing for the rack to pass through.

[0015] In summary, the beneficial effects of the present invention compared with the prior art are as follows:

[0016] The utility model forms a connection state of clamping the rack by cooperating with the gear and the guide wheel, and at this time the rack and the gear maintain a meshing transmission state, thereby maintaining stable transmission of the rack and the gear. At the same time, the guide wheel is located in the guide groove of the rack to provide linear guiding movement and support for the rack, thereby effectively avoiding the trouble of measurement and not being restricted by the installation direction of the slide rail. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic cross-sectional structure diagram of a stable guide structure for rack and pinion meshing in one embodiment of the utility model;

[0018] Figure 2 This is one of the three-dimensional structural schematic diagrams of a stable guide structure for rack and pinion meshing in one embodiment of the utility model;

[0019] Figure 3 This is the second three-dimensional structural schematic diagram of a stable guide structure for rack and pinion meshing in one embodiment of the utility model. DETAILED DESCRIPTION

[0020] The utility model is further described below in conjunction with the accompanying drawings and specific implementation methods:

[0021] like Figures 1 to 3 As shown, the embodiment of the utility model preferably provides a stable guiding structure for the meshing of rack and pinion, including a casing 1, a gear 2 is rotatably arranged inside the casing 1, a guide wheel 3 is rotatably arranged on one side of the casing 1, a cylinder 4 is arranged on one side of the casing 1, a rack 5 meshing with the gear 2 is arranged on the driving shaft of the cylinder 4, a guide groove 6 is recessed inwardly along the length direction on the side opposite to the gear 2 on the rack 5, and the contour surface of the guide wheel 3 abuts against the bottom wall of the guide groove 6.

[0022] Specifically, the gear and the guide wheel cooperate to form a connection state of clamping the rack, and at this time the rack and the gear maintain a meshing transmission state, thereby maintaining stable transmission between the rack and the gear. At the same time, the guide wheel is located in the guide groove of the rack to provide linear guiding movement and support for the rack, thereby effectively avoiding the trouble of measurement and not being restricted by the installation direction of the slide rail.

[0023] Furthermore, a first connecting shaft 7 is connected to one side of the housing 1, and the guide wheel 3 is placed on the first connecting shaft 7 through a bearing sleeve, and a first retaining spring (not shown) is provided on the first connecting shaft 7 and below the guide wheel 3. Specifically, the first retaining spring is used to achieve the limit installation of the guide wheel on the first connecting shaft.

[0024] Furthermore, a first top piece 21 is threadedly connected to one side of the housing 1, and one end of the first top piece 21 presses against one side of the first connecting shaft 7. Specifically, when the central axis of the first connecting shaft is offset, the user can screw the first top piece to move the first top piece along the thread and press against one side of the first connecting shaft, so that the first connecting shaft is adjusted relative to the housing, thereby maintaining the guiding cooperation between the guide wheel on the first connecting shaft and the rack guide groove.

[0025] Furthermore, the first tightening member 21 is an external hexagonal bolt.

[0026] Furthermore, a first screw hole 22 is provided at one end of the first connecting shaft 7, and a connecting screw (not shown) threadedly matched with the first screw hole 22 is inserted into the housing 1, thereby realizing the detachable installation of the first connecting shaft.

[0027] Furthermore, the side surface of the first connecting shaft 7 that contacts the first pressing member 21 is a plane, so that when the first connecting shaft is pressed and corrected by the first pressing member, the first connecting shaft can be corrected in the direction of the gear rack.

[0028] Furthermore, the housing 1 is rotatably connected to a second connecting shaft 9 via a bearing, and the gear 2 is detachably connected to the second connecting shaft 9, thereby facilitating the disassembly, replacement, and maintenance of the gear.

[0029] Furthermore, the gear 2 is annular in shape and sleeved on the second connecting shaft 9. The second connecting shaft 9 is provided with second retaining springs 10 on both sides of the gear 2. A second screw hole 11 is provided on one side of the gear 2. The second screw hole 11 is threaded with a second top piece (not shown) that is tightly connected to the side wall of the second connecting shaft 9. Specifically, the gear is limitedly installed on the second connecting shaft by the second retaining spring, and the gear and the second connecting shaft are tightly matched by the second top piece on the gear and the second connecting shaft to achieve synchronous rotation.

[0030] Furthermore, the upper end of the second connecting shaft 9 protrudes outward from the outer side of the housing 1. The second connecting shaft can be connected to an external driving object to realize the rotational drive of the driving object.

[0031] Furthermore, through holes 12 are symmetrically formed on both sides of the housing 1 for the rack 5 to pass through.

[0032] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. The technicians in this industry should understand that the utility model is not limited by the above embodiments. The above embodiments and the description are only to illustrate the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model will have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A stable guide structure for meshing a rack and a pinion, comprising a housing (1), wherein a gear (2) is rotatably arranged in the housing (1), and characterized in that: A guide wheel (3) is rotatably arranged on one side of the housing (1), a cylinder (4) is arranged on one side of the housing (1), a drive shaft of the cylinder (4) is provided with a rack (5) meshing with the gear (2), a guide groove (6) is concave inwardly along the length direction on the side of the rack (5) away from the gear (2), and the contour surface of the guide wheel (3) abuts against the bottom wall of the guide groove (6).

2. A stable guide structure for rack and pinion meshing according to claim 1, characterized in that: A first connecting shaft (7) is connected to one side of the housing (1); the guide wheel (3) is placed on the first connecting shaft (7) via a bearing sleeve; and a first retaining spring is provided on the first connecting shaft (7) and below the guide wheel (3).

3. A stable guide structure for rack and pinion meshing according to claim 2, characterized in that: A first tightening member (21) is threadedly connected to one side of the housing (1), and one end of the first tightening member (21) is pressed against one side of the first connecting shaft (7).

4. A stable guide structure for rack and pinion meshing according to claim 3, characterized in that: The first tightening member (21) is an external hexagonal bolt.

5. A stable guide structure for rack and pinion meshing according to claim 2, characterized in that: A first screw hole (22) is provided at one end of the first connecting shaft (7), and a connecting screw threadably matched with the first screw hole (22) is inserted into the housing (1).

6. A stable guide structure for rack and pinion meshing according to claim 3, characterized in that: A side surface of the first connecting shaft (7) that contacts the first tightening member (21) is a plane.

7. A stable guide structure for rack and pinion meshing according to claim 1, characterized in that: The housing (1) is rotatably connected to a second connecting shaft (9) via a bearing, and the gear (2) is detachably connected to the second connecting shaft (9).

8. A stable guide structure for rack and pinion meshing according to claim 7, characterized in that: The gear (2) is annular in shape and is sleeved on the second connecting shaft (9). Second retaining springs (10) are respectively arranged on the second connecting shaft (9) and on the upper and lower sides of the gear (2). A second screw hole (11) is penetrated through one side of the gear (2). The second screw hole (11) has an internal thread that is inserted with a second tightening piece that is tightly connected to the side wall of the second connecting shaft (9).

9. A stable guide structure for rack and pinion meshing according to claim 7, characterized in that: The upper end of the second connecting shaft (9) protrudes outwardly from the outside of the casing (1).

10. A stable guide structure for rack and pinion meshing according to claim 1, characterized in that: The housing (1) has symmetrically provided two sides with through holes (12) through which the rack (5) can pass.

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