Speed reducer for workpiece positioning

Abstract

The utility model discloses a speed reducer for workpiece positioning, which comprises a servo motor, a box body and an external gear meshed with a gear or a rack of an external client to do rotation or linear reciprocating motion, a motor small gear, a large gear and an output shaft are arranged in the box body, the servo motor is in driving connection with the motor small gear, and the large gear is in driving connection with the output shaft. The motor pinion and a motor shaft of the servo motor are of an integrated structure, the large gear is installed at one end of the output shaft, the motor pinion and the large gear are in meshing transmission, the external gear is installed at the other end of the output shaft, the external gear is located outside the box body, and the motor pinion and the large gear are in meshing transmission. A motor shaft of the servo motor, the motor pinion, the large gear, the output shaft and the external gear form a U-shaped arrangement structure. The speed reducer for workpiece positioning adopts a U-shaped arrangement structure, and is suitable for arrangement in a narrow space.

Description

Technical Field

[0001] This utility model relates to the technical field of speed reducers, and in particular to a speed reducer for workpiece positioning. Background Technology

[0002] Existing workpiece positioning reducers generally adopt traditional straight-line or L-shaped arrangements, which have significant drawbacks in terms of space utilization efficiency. Specifically:

[0003] (1) Linear arrangement, usually adopts a design scheme of multi-stage gear sets arranged in series along a single axis. For example, a three-stage reduction mechanism needs to arrange the input shaft, intermediate transmission shaft and output shaft in sequence, which directly leads to the axial length increasing exponentially with the reduction ratio;

[0004] (2) The L-shaped right angle arrangement changes the power transmission direction by 90 degrees through the orthogonal axis design, which can theoretically optimize the planar layout space. However, there is still a structural contradiction in actual application. The volume ratio of the internal bevel gear or worm gear transmission components is relatively high, which means that the gearbox needs to reserve a large installation space in both the horizontal and vertical directions. Summary of the Invention

[0005] The technical problem to be solved by this utility model is: in order to overcome the shortcomings of the existing technology, a reducer for workpiece positioning is provided, which adopts a U-shaped arrangement structure and is suitable for arrangement in narrow spaces.

[0006] The technical solution adopted by this utility model to solve its technical problem is: a reducer for workpiece positioning, including a servo motor, a housing, and an external gear that meshes with a gear or rack of an external client to perform rotational or linear reciprocating motion. The housing is provided with a motor pinion, a large gear, and an output shaft. The servo motor is driven and connected to the motor pinion. The motor pinion and the motor shaft of the servo motor are an integral structure. The large gear is installed at one end of the output shaft, and the motor pinion meshes with the large gear for transmission. The external gear is installed at the other end of the output shaft and is located outside the housing. The motor shaft of the servo motor, the motor pinion, the large gear, the output shaft, and the external gear form a U-shaped arrangement structure.

[0007] To be further specific, in the above technical solution, the large gear and the output shaft are connected by an interference fit.

[0008] To be further specific, in the above technical solution, the output shaft and the external gear are connected by bolts, and the output shaft is provided with a positioning stop to ensure connection accuracy.

[0009] To be further specific, in the above technical solution, the servo motor is equipped with an encoder for implementing closed-loop control.

[0010] To be further specific, in the above technical solution, the housing is also equipped with a cover plate for sealing the motor pinion, gear and output shaft in the inner cavity of the housing, and a sealing gasket to prevent oil leakage is installed between the housing and the cover plate.

[0011] To be further specific, in the above technical solution, the output shaft is supported in the housing by a first bearing and a second bearing, both of which are tapered roller bearings.

[0012] To be further specific, in the above technical solution, the mating part between the output shaft and the housing is provided with an oil seal with a double-lip skeleton structure, and an oil seal bushing is provided between the oil seal with the double-lip skeleton structure and the output shaft.

[0013] The beneficial effects of this utility model are as follows: This utility model provides a workpiece positioning reducer, which adopts a more compact U-shaped arrangement structure, suitable for arrangement in some narrow spaces. It directly drives the motor pinion through a servo motor. The motor shaft and the motor pinion are integrated into one structure, resulting in higher driving strength. The motor pinion drives the large gear, the large gear drives the output shaft, and the output shaft drives the external gear. The external gear meshes with the gear or rack of the external client, which can realize rotational and linear reciprocating motion respectively. The overall axial dimension of the reducer is shorter, saving equipment installation space and reducing costs. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 yes Figure 1 A sectional view.

[0017] The labels in the diagram are as follows: 1. Servo motor; 2. Motor pinion; 3. Large gear; 4. First bearing; 5. Bolt; 6. Oil seal; 7. External gear; 8. Oil seal bushing; 9. Sealing gasket; 10. Housing; 11. Cover plate; 12. Second bearing; 13. Output shaft. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0019] See Figure 1 and Figure 2 This utility model discloses a reducer for workpiece positioning, comprising a servo motor 1, a housing 10, and an external gear 7 that meshes with a gear or rack on an external client to perform rotational or linear reciprocating motion. The housing 10 contains a small gear 2, a large gear 3, and an output shaft 13. The servo motor 1 is driven by the small gear 2, and the small gear 2 and the motor shaft of the servo motor 1 are integrally formed. The large gear 3 is installed at one end of the output shaft 13, and the small gear 2 and the large gear 3 mesh and transmit power. The external gear 7 is installed at the other end of the output shaft 13 and is located outside the housing 10. The motor shaft of the servo motor 1, the small gear 2, the large gear 3, the output shaft 13, and the external gear 7 form a U-shaped arrangement.

[0020] The large gear 3 and the output shaft 13 are connected by an interference fit. The output shaft 13 and the external gear 7 are connected by bolts 5, and the output shaft 13 is provided with a positioning stop to ensure connection accuracy. An encoder for closed-loop control is installed on the servo motor 1. A cover plate 11 is also installed on the housing 10 to seal the motor pinion 2, large gear 3 and output shaft 13 in the inner cavity of the housing 10. A sealing gasket 9 is installed between the housing 10 and the cover plate 11 to prevent oil leakage. The output shaft 13 is supported in the housing 10 by a first bearing 4 and a second bearing 12, both of which are tapered roller bearings. A double-lip skeleton structure oil seal 6 is provided at the mating part between the output shaft 13 and the housing 10, and an oil seal bushing 8 is provided between the double-lip skeleton structure oil seal 6 and the output shaft 13.

[0021] In other words, in this utility model, the servo motor 1 directly drives the motor pinion 2, and the motor pinion 2 and the motor shaft of the servo motor 1 are made into an integral structure; the motor pinion 2 meshes with the large gear 3, driving the output shaft 13 to rotate; the large gear 3 meshes with the output shaft 13 with an interference fit and does not have a key, and is installed using a high-pressure machine; the output shaft 13 drives the external gear 7, and the output shaft 13 and the external gear 7 are connected by bolts 5, with a positioning stop on the shaft to ensure connection accuracy; the external gear 7 meshes with an external client gear or rack to perform rotational or linear reciprocating motion, and the servo motor 1 is equipped with an encoder at the tail to realize closed-loop control; a sealing gasket 9 is added between the housing 10 and the cover plate 11 to prevent oil leakage; an oil seal bushing 8 is added between the oil seal 6 and the output shaft 13.

[0022] This utility model discloses a reducer for workpiece positioning, which adopts a more compact U-shaped arrangement structure, suitable for placement in some narrow spaces. The servo motor 1 directly drives the motor pinion 2. The motor shaft of the servo motor 1 and the motor pinion 2 are integrated into one structure, resulting in higher driving strength. The motor pinion 2 drives the large gear 3, the large gear 3 drives the output shaft 13, and the output shaft 13 drives the external gear 7. The external gear 7 meshes with the gear or rack of the external client, which can realize rotational and linear reciprocating motion respectively. The overall axial dimension of the reducer is shorter, saving equipment installation space and reducing costs.

[0023] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A speed reducer for workpiece positioning, characterized in that: The device includes a servo motor (1), a housing (10), and an external gear (7) that meshes with a gear or rack of an external client to perform rotational or linear reciprocating motion. The housing (10) contains a motor pinion (2), a large gear (3), and an output shaft (13). The servo motor (1) is driven by the motor pinion (2). The motor pinion (2) and the motor shaft of the servo motor (1) are an integral structure. The large gear (3) is installed at one end of the output shaft (13), and the motor pinion (2) meshes with the large gear (3) for transmission. The external gear (7) is installed at the other end of the output shaft (13) and is located outside the housing (10). The motor shaft of the servo motor (1), the motor pinion (2), the large gear (3), the output shaft (13), and the external gear (7) form a U-shaped arrangement.

2. The reducer for workpiece positioning according to claim 1, characterized in that: The large gear (3) and the output shaft (13) are connected by an interference fit.

3. The reducer for workpiece positioning according to claim 1, characterized in that: The output shaft (13) and the external gear (7) are connected by bolts (5), and the output shaft (13) is provided with a positioning stop to ensure connection accuracy.

4. The reducer for workpiece positioning according to claim 1, characterized in that: The servo motor (1) is equipped with an encoder to achieve closed-loop control.

5. A reducer for workpiece positioning according to claim 1, characterized in that: The housing (10) is also equipped with a cover plate (11) for sealing the motor pinion (2), gear (3) and output shaft (13) in the inner cavity of the housing (10). A sealing gasket (9) to prevent oil leakage is installed between the housing (10) and the cover plate (11).

6. A reducer for workpiece positioning according to claim 1, characterized in that: The output shaft (13) is supported in the housing (10) by a first bearing (4) and a second bearing (12), both of which are tapered roller bearings.

7. A reducer for workpiece positioning according to claim 1, characterized in that: The output shaft (13) and the housing (10) are fitted with an oil seal (6) with a double lip skeleton structure, and an oil seal bushing (8) is provided between the oil seal (6) with the output shaft (13).

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