Eccentric gear shaft of gearbox

Abstract

The utility model provides an eccentric gear shaft of a gearbox, and belongs to the technical field of machinery. The problem that an existing gear shaft is inconvenient to adapt to different input components is solved. The gear box eccentric gear shaft comprises a shaft body, a circle of teeth are formed on the outer wall of the rear end of the shaft body, a positioning seat is arranged at the front end of the shaft body, a strip-shaped notch groove is formed in the side wall of the positioning seat, and the length extending direction of the notch groove is perpendicular to the axial direction of the shaft body; the notch groove is composed of a groove side wall and a groove bottom wall, and the groove side wall is obliquely arranged so that the groove width of the notch groove can be gradually decreased from front to back. A strip-shaped block is arranged in the notch groove, the rear end face of the strip-shaped block is pressed on the groove bottom wall, the side wall of the strip-shaped block is provided with an inclined face matched with and attached to the side wall of the groove, the two ends of the strip-shaped block are detachably and fixedly connected with the positioning base through screws, and the axis of the bolt extends in the width direction of the strip-shaped block. A connecting shaft is vertically formed on the front end face of the strip-shaped block, and the connecting shaft and the shaft body are eccentrically arranged. The eccentric gear shaft of the gearbox is convenient to adapt to different input parts.

Description

Technical Field

[0001] The utility model belongs to the technical field of machinery and relates to a gear box, in particular to an eccentric gear shaft of the gear box. Background Art

[0002] The eccentric gear shaft, that is, the eccentric gear shaft, is a specially designed transmission component. It achieves the transmission effect of different center distances between the two shafts through the combination of the eccentric shaft and the gear.

[0003] The existing eccentric gear shaft, such as an eccentric shaft gear for a plunger pump disclosed in the China Patent Library (application number: 202223403852.4), includes a main shaft body and a gear with an axial hole, wherein the main shaft body is composed of a left-section shaft body, a gear shaft body, a right-section shaft body and an eccentric shaft body arranged on the right end face of the right-section shaft body, a positioning plate is arranged between the gear shaft body and the right-section shaft body, a detachable gear is sleeved on the gear shaft body, and a positioning structure is arranged on the gear and the gear shaft body; a slot is arranged on the gear shaft body on the left side of the gear and a retaining spring is clamped thereon; and a plurality of through holes surrounding the axial hole and evenly distributed are arranged on the gear.

[0004] In the above-mentioned eccentric shaft gear, the eccentric shaft body and the main shaft body are an integrated structure. When the eccentric shaft gear is applied to the gearbox, in order to adapt to different output components, the eccentric shaft gear needs to be replaced as a whole, and the bearings used to rotate and position the eccentric shaft gear need to be disassembled and assembled during the replacement process, which makes the whole operation inconvenient. Utility Model Content

[0005] The utility model aims to solve the above problems in the prior art and proposes an eccentric gear shaft of a gear box which is easy to adapt to different output components.

[0006] The purpose of the utility model can be achieved through the following technical solutions: an eccentric gear shaft of a gear box, including a shaft body, a circle of teeth formed on the outer wall of the rear end of the shaft body, characterized in that the front end of the shaft body is a positioning seat coaxially arranged with the shaft body, and a strip-shaped notch groove is provided on the side wall of the positioning seat, and the length extension direction of the notch groove is perpendicular to the axial direction of the shaft body; the notch groove is composed of a groove side wall and a groove bottom wall, and the groove side wall is inclined so that the groove width of the notch groove gradually decreases from front to back; a strip block matching with it is provided in the notch groove, the rear end face of the strip block is pressed on the groove bottom wall, and the side wall of the strip block is provided with an inclined surface matching and abutting the side wall of the groove, and both ends of the strip block are detachably connected to the positioning seat by screws, and the axis of the bolt extends along the width direction of the strip block; a connecting shaft is vertically formed on the front end face of the strip block, and the connecting shaft and the shaft body are eccentrically arranged.

[0007] During assembly, first push the bar block into the notch groove from the side of the positioning seat, and then screw in the screws to stabilize the bar block in position.

[0008] The bar block is detachably connected to the positioning seat by screws, so that in actual use, different output components can be adapted by replacing the bar block type, and the bar block can be installed and positioned by plugging and unplugging and rotating the screws. The entire operation has fewer steps and has the advantages of convenient and easy operation.

[0009] In the above-mentioned gearbox eccentric gear shaft, a strip groove is provided on the front end surface of the above-mentioned positioning seat, and the length extension directions of the strip groove and the notch groove are perpendicular, one end of the strip groove is an open end, and the open end is connected to the notch groove. Providing the notch groove can not only reduce the weight of the eccentric gear shaft, but also reduce the material input of the eccentric gear shaft.

[0010] In the above-mentioned gearbox eccentric gear shaft, a guide block whose shape and size match the open end is formed in the middle of the strip block, and the guide block is inserted into the open end. The guide block cooperates with the open end, which is not only used for guiding the installation of the strip block, so that the strip block can be moved into place at one time, which is convenient for assembly, but also can strengthen the connection strength between the strip block and the positioning seat, and enhance the structural stability of the eccentric gear shaft.

[0011] In the above-mentioned gearbox eccentric gear shaft, the shaft body includes a front shaft and a rear shaft arranged coaxially, the front end of the front shaft is the above-mentioned positioning seat, the above-mentioned teeth are arranged at the rear end of the rear shaft, and the rear end of the front shaft is fixedly connected to the front end of the rear shaft. The shaft body adopts a split structure consisting of the front shaft and the rear shaft, which can reduce the difficulty of processing and design.

[0012] In the above-mentioned gearbox eccentric gear shaft, a bearing is sleeved at the connection between the front shaft and the rear shaft, and the inner ring of the bearing is fixedly connected to the front shaft and the rear shaft by interference fit. The bearing is arranged at the connection between the front shaft and the rear shaft, which can make the connection between the front shaft and the rear shaft more stable.

[0013] In the above-mentioned eccentric gear shaft of the gearbox, a circle of key blocks is vertically formed on the front end surface of the rear shaft, and a key slot matching the key block is provided at the rear end of the front shaft. The number of key slots and key blocks is the same, and each key block is inserted into the corresponding key slot. The key block and the key slot cooperate to form a more stable circumferential fit between the front shaft and the rear shaft, thereby improving the transmission stability and accuracy.

[0014] In the above-mentioned gearbox eccentric gear shaft, a cylindrical pin is vertically fixed on the rear end face of the front shaft, a circular hole matching the cylindrical pin is opened on the front end face of the rear shaft, and the rear end of the cylindrical pin is embedded in the circular hole. With the cooperation of the cylindrical pin and the circular hole, the coaxiality of the front shaft and the rear shaft can be strengthened, further improving the transmission accuracy.

[0015] In the above-mentioned eccentric gear shaft of the gear box, a through hole is formed in the bottom wall of the strip groove along the axial direction of the shaft body, a threaded hole is formed on the rear shaft correspondingly, and the front shaft is axially fixedly connected to the rear shaft by a bolt passing through the through hole and screwed into the threaded hole. The above-mentioned design facilitates the connection between the front shaft and the rear shaft.

[0016] Compared with the prior art, the eccentric gear shaft of the gearbox has the following advantages:

[0017] 1. The bar block is detachably connected to the positioning seat by screws. In actual use, different output components can be adapted by replacing the bar block type, and the bar block can be installed and positioned by plugging and unplugging and rotating the screws. The entire operation steps are relatively few, and it has the advantages of convenient and easy operation.

[0018] 2. The guide block and the open end cooperate not only to guide the installation of the strip block, so that the strip block can be moved into place at one time, which is convenient for assembly, but also to strengthen the connection strength between the strip block and the positioning seat, and enhance the structural stability of the eccentric gear shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional schematic diagram of the eccentric gear shaft of the gear box.

[0020] Figure 2 It is a three-dimensional schematic diagram of the gear box eccentric gear shaft after removing the bearing.

[0021] Figure 3 It is a cross-sectional schematic diagram of the eccentric gear shaft of the gear box.

[0022] Figure 4 It is a three-dimensional schematic diagram of the axis.

[0023] In the figure, 1, shaft body; 1a, teeth; 1b, positioning seat; 1c, notched groove; 1c1, groove side wall; 1c2, groove bottom wall; 1d, strip groove; 1e, front shaft; 1f, rear shaft; 1f1, key block; 2, strip block; 2a, connecting shaft; 2b, inclined surface; 2c, guide block; 3, screw; 4, bearing; 5, bolt; 6, cylindrical pin. DETAILED DESCRIPTION

[0024] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0025] like Figure 1 and Figure 2 As shown, the eccentric gear shaft of the gear box includes a shaft body 1, a circle of teeth 1a is formed on the outer wall of the rear end of the shaft body 1, and the front end of the shaft body 1 is a positioning seat 1b coaxially arranged with the shaft body 1.

[0026] in,

[0027] like Figure 2 and Figure 4 As shown, a strip-shaped notch groove 1c is provided on the side wall of the positioning seat 1b, and the length extension direction of the notch groove 1c is perpendicular to the axial direction of the shaft body 1. Figure 1As shown, the notch groove 1c is composed of a groove side wall 1c1 and a groove bottom wall 1c2, and the groove side wall 1c1 is inclined so that the groove width of the notch groove 1c gradually decreases from front to back. A matching strip block 2 is provided in the notch groove 1c, and the length extension direction of the strip block 2 and the notch groove 1c is consistent. Among them, the rear end face of the strip block 2 is pressed on the groove bottom wall 1c2; a connecting shaft 2a is vertically formed on the front end face of the strip block 2, and the axes of the connecting shaft 2a and the shaft body 1 are parallel, but the connecting shaft 2a and the shaft body 1 are eccentrically arranged; an inclined surface 2b matching and abutting the groove side wall 1c1 is provided on the side wall of the strip block 2, and both ends of the strip block 2 are detachably connected to the positioning seat 1b by screws 3, and the axis of the bolt 5 extends along the width direction of the strip block 2. In actual products, the strip block 2 and the connecting shaft 2a are an integrated structure.

[0028] During assembly, first push the strip block 2 from the side of the positioning seat 1b into the notch groove 1c, and then screw on the screws 3 to stabilize the strip block 2 in position.

[0029] The bar block 2 is detachably connected to the positioning seat 1b by screws 3. In actual use, different output components can be adapted by replacing the type of bar block 2, and the bar block 2 can be installed and positioned by plugging and unplugging and rotating the screws 3. The entire operation steps are relatively few, and it has the advantages of convenient and easy operation.

[0030] Further explanation, such as Figures 1 to 4 As shown, a strip groove 1d is provided on the front end surface of the positioning seat 1b, and the length extension directions of the strip groove 1d and the notch groove 1c are perpendicular. One end of the strip groove 1d is an open end, and the open end is connected to the notch groove 1c. The notch groove 1c is provided, which can not only reduce the weight of the eccentric gear shaft, but also reduce the material input of the eccentric gear shaft. A guide block 2c whose shape and size match the open end is formed in the middle part of the strip block 2, and the guide block 2c is inserted into the open end. The guide block 2c cooperates with the open end, which is not only used for guiding the installation of the strip block 2, so that the strip block 2 can be moved into place at one time, which is convenient for assembly, but also can strengthen the connection strength between the strip block 2 and the positioning seat 1b, and enhance the structural stability of the eccentric gear shaft.

[0031] like Figure 2 and Figure 4 As shown, the shaft body 1 is a split structure. Specifically, the shaft body 1 includes a coaxially arranged front shaft 1e and a rear shaft 1f. The front end of the front shaft 1e is a positioning seat 1b, and the teeth 1a are arranged at the rear end of the rear shaft 1f, and the rear end of the front shaft 1e is fixedly connected with the front end of the rear shaft 1f. The shaft body 1 adopts a split structure, which can reduce the difficulty of processing and design. Further explanation, the connection between the front shaft 1e and the rear shaft 1f is sleeved with a bearing 4, and the bearing 4 is a common rolling bearing 4, and the inner ring of the bearing 4 is fixedly connected with the front shaft 1e and the rear shaft 1f by an interference fit. The bearing 4 is arranged at the connection between the front shaft 1e and the rear shaft 1f, which can make the connection between the front shaft 1e and the rear shaft 1f more stable.

[0032] In this embodiment, the connection method of the front axle 1e and the rear axle 1f is as follows: a circle of key blocks 1f1 is vertically formed on the front end surface of the rear axle 1f, and a key slot matching the key block 1f1 is provided at the rear end of the front axle 1e. The number of key slots and key blocks 1f1 is the same, and each key block 1f1 is inserted into the corresponding key slot. The key block 1f1 cooperates with the key slot to form a more stable circumferential fit between the front axle 1e and the rear axle 1f, thereby improving the transmission stability and accuracy. A through hole is provided on the bottom wall of the strip groove 1d along the axial direction of the shaft body 1, and the through hole is coaxially arranged with the front axle 1e. A threaded hole is correspondingly provided on the rear axle 1f, and the front axle 1e is axially fixedly connected to the rear axle 1f by a bolt 5 that passes through the through hole and is screwed into the threaded hole. In the actual product, the rear end surface of the front axle 1e is pressed on the front end surface of the rear axle 1f.

[0033] Further explanation, such as Figure 3 As shown, a cylindrical pin 6 is vertically fixed on the rear end face of the front axle 1e, and a circular hole matching the cylindrical pin 6 is opened on the front end face of the rear axle 1f, and the rear end of the cylindrical pin 6 is embedded in the circular hole. With the cooperation of the cylindrical pin 6 and the circular hole, the coaxiality of the front axle 1e and the rear axle 1f can be strengthened, further improving the transmission accuracy.

[0034] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. An eccentric gear shaft of a gear box, comprising a shaft body (1), a circle of teeth (1a) formed on the outer wall of the rear end of the shaft body (1), characterized in that: The front end of the shaft body (1) is a positioning seat (1b) coaxially arranged with the shaft body (1); a strip-shaped notch groove (1c) is provided on the side wall of the positioning seat (1b); and the length extension direction of the notch groove (1c) is perpendicular to the axial direction of the shaft body (1); the notch groove (1c) is composed of a groove side wall (1c1) and a groove bottom wall (1c2); the groove side wall (1c1) is inclined so that the groove width of the notch groove (1c) gradually decreases from front to back; and a matching notch groove (1c) is provided in the notch groove (1c). A strip block (2), the rear end face of the strip block (2) is pressed against the groove bottom wall (1c2), the side wall of the strip block (2) is provided with an inclined surface (2b) matching and abutting against the groove side wall (1c1), both ends of the strip block (2) are detachably connected to the positioning seat (1b) by screws (3), and the axis of the bolt (5) extends along the width direction of the strip block (2); a connecting shaft (2a) is vertically formed on the front end face of the strip block (2), and the connecting shaft (2a) and the shaft body (1) are eccentrically arranged.

2. The eccentric gear shaft of the gear box according to claim 1, characterized in that: A strip groove (1d) is provided on the front end surface of the positioning seat (1b), and the length extension directions of the strip groove (1d) and the notch groove (1c) are perpendicular, one end of the strip groove (1d) is an open end, and the open end is connected to the notch groove (1c).

3. The eccentric gear shaft of the gear box according to claim 2, characterized in that: A guide block (2c) having a shape and size matching the open end is formed in the middle of the strip block (2), and the guide block (2c) is inserted into the open end.

4. The eccentric gear shaft of the gear box according to claim 1, 2 or 3, characterized in that: The shaft body (1) comprises a front shaft (1e) and a rear shaft (1f) which are coaxially arranged, the front end of the front shaft (1e) being the above-mentioned positioning seat (1b), the above-mentioned teeth (1a) being arranged at the rear end of the rear shaft (1f), and the rear end of the front shaft (1e) being fixedly connected to the front end of the rear shaft (1f).

5. The eccentric gear shaft of the gear box according to claim 4, characterized in that: A bearing (4) is sleeved at the connection between the front axle (1e) and the rear axle (1f), and the inner ring of the bearing (4) is fixedly connected to the front axle (1e) and the rear axle (1f) by means of interference fit.

6. The eccentric gear shaft of the gear box according to claim 4, characterized in that: A circle of key blocks (1f1) is vertically formed on the front end surface of the rear axle (1f), and a key slot matching the key block (1f1) is provided at the rear end of the front axle (1e). The number of key slots and key blocks (1f1) is the same, and each key block (1f1) is inserted into the corresponding key slot.

7. The eccentric gear shaft of the gear box according to claim 6, characterized in that: A cylindrical pin (6) is vertically fixed on the rear end surface of the front shaft (1e), a circular hole matching the cylindrical pin (6) is opened on the front end surface of the rear shaft (1f), and the rear end of the cylindrical pin (6) is embedded in the circular hole.

8. The eccentric gear shaft of the gear box according to claim 7, characterized in that: A through hole is formed in the bottom wall of the strip groove (1d) along the axial direction of the shaft body (1), a threaded hole is correspondingly formed on the rear shaft (1f), and the front shaft (1e) is axially fixedly connected to the rear shaft (1f) by means of a bolt (5) passing through the through hole and screwed into the threaded hole.

Images