Electric hydraulic tool

Abstract

The utility model discloses an electric hydraulic tool which comprises a driving device, a power device and a working head, a planetary reducing mechanism driven by a motor is arranged in the power device, the planetary reducing mechanism is provided with a planetary wheel support, a connecting column is arranged in the center of the end portion of the planetary wheel support, an eccentric shaft is arranged in the driving device, and the eccentric shaft is connected with the working head. A positioning groove matched with the connecting column is formed in the end, close to the planet wheel support, of the eccentric shaft, a bolt is arranged on a shaft body of the eccentric shaft in a penetrating mode, and the bolt penetrates through the connecting column of the positioning groove and is used for fixedly connecting the eccentric shaft to the planet wheel support to achieve coaxial torsion transmission. According to the hydraulic tool, the eccentric shaft is fixed to the planet wheel support through the pin, so that the eccentric shaft is not prone to swinging up and down in the long-time work process, the structure is more stable, the service life of the hydraulic tool is prolonged, in addition, machining is convenient through the pin fixing mode, and the production cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic tools, and more specifically, to an electric hydraulic tool. Background Art

[0002] Hydraulic tools have stable and strong output pressure, so they are widely used in circuit maintenance work, such as hydraulic shearing tools and hydraulic crimping tools for cable connectors.

[0003] The existing technical solution for hydraulic tools, such as that disclosed in Chinese Patent No. 202322535029.7, adopts a solution in which the torque transmission part cooperates with the positioning groove and the limiting groove to replace the solution in the existing design that removes the reduction mechanism to separate the drive device from the power device. This solution has the following disadvantages:

[0004] 1. The eccentric shaft is only restricted to the torque transmission part by the housing. Although the shear force can be overcome by the limiting groove and the convex strip, the eccentric shaft will always swing up and down under the inertia of centrifugal force, which is easy to cause wear and damage of parts during long-term use, greatly affecting the service life of the hydraulic tool.

[0005] 2. The processing is complicated. It is necessary to process a cylindrical insert part and a long convex strip part on the torque transmission part, and to process a positioning groove and a limiting groove on the eccentric shaft, which makes the processing difficult and increases the production cost. Utility Model Content

[0006] In response to the shortcomings of the existing technology, the purpose of the present invention is to provide an electric hydraulic tool, which fixes the eccentric shaft to the planetary gear bracket by pins, so that the eccentric shaft is not prone to swinging up and down during long-term work, the structure is more stable, and the service life of the hydraulic tool is increased. In addition, the pin fixing method is also more convenient in processing and reduces production costs.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an electric hydraulic tool, comprising a drive device, a power device and a working head, wherein the power device is provided with a planetary reduction mechanism driven by a motor, the planetary reduction mechanism has a planetary gear bracket, a connecting column is provided at the center of the end of the planetary gear bracket, an eccentric shaft is provided in the drive device, and a positioning groove which is adapted to the connecting column is provided at one end of the eccentric shaft close to the planetary gear bracket, a pin is passed through the shaft body of the eccentric shaft, and the connecting column through which the pin passes through the positioning groove is used to fix the eccentric shaft to the planetary gear bracket to realize coaxial torque transmission.

[0008] The utility model is further configured as follows: a first through hole passing through the positioning groove is provided on the outer wall of the eccentric shaft, a second through hole adapted to the first through hole is provided on the outer wall of the connecting column, and the pin is located in the first through hole and the second through hole.

[0009] The utility model is further configured as follows: the planetary gear bracket is integrally formed.

[0010] The utility model is further configured such that: the length of the latch pin is smaller than the diameter of the eccentric shaft.

[0011] By adopting the above technical solution, the practical electric hydraulic tool fixes the eccentric shaft on the planetary gear bracket through pins, so that the eccentric shaft is not prone to swinging up and down during long-term work, the structure is more stable, and the service life of the hydraulic tool is increased. In addition, the pin fixing method is also more convenient in processing and reduces production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural diagram of the utility model;

[0013] Figure 2 This is a schematic diagram of the structure decomposition of the utility model;

[0014] Figure 3 Schematic diagram of the connection between the eccentric shaft and the planetary gear bracket;

[0015] Figure 4 Schematic diagram of the structure of the eccentric shaft.

[0016] 1. Driving device; 2. Power device; 3. Working head; 4. Planetary reduction mechanism; 5. Planetary gear bracket; 50. Connecting column; 500. Second through hole; 6. Eccentric shaft; 60. Positioning groove; 61. First through hole; 7. Latch. DETAILED DESCRIPTION

[0017] Reference Figures 1 to 4 The embodiments of the present invention are further described.

[0018] The utility model discloses an electric hydraulic tool, comprising a drive unit 1, a power unit 2, and a working head 3. The power unit 2 is provided with a motor-driven planetary reduction mechanism 4, the planetary reduction mechanism 4 having a planetary gear carrier 5, a connecting post 50 disposed at the center of the end of the planetary gear carrier 5. The drive unit 1 is provided with an eccentric shaft 6, and the eccentric shaft 6 has a positioning groove 60 disposed at one end thereof near the planetary gear carrier 5, which is adapted to fit the connecting post 50. A latch 7 is provided on the shaft of the eccentric shaft 6, and the latch 7 passes through the positioning groove 60 and the connecting post 50, which is used to securely connect the eccentric shaft 6 to the planetary gear carrier 5 to achieve coaxial torque transmission. A first through-hole 61 is provided on the outer wall of the eccentric shaft 6, which passes through the positioning groove 60. A second through-hole 500 is provided on the outer wall of the connecting post 50, which fits the first through-hole 61. The latch 7 is located within the first through-hole 61 and the second through-hole 500. The planetary gear carrier 5 is integrally formed. The length of the latch pin 7 is smaller than the diameter of the eccentric shaft 6 .

[0019] Working principle: Figure 3 As shown, when the eccentric shaft 6 is installed on the planetary gear bracket 5, the connecting column 50 of the planetary gear bracket 5 cooperates with the positioning groove 60 of the eccentric wheel to ensure the concentricity of the eccentric shaft 6 and the planetary gear bracket 5, and then the eccentric shaft 6 is fixed in the planetary gear bracket 5 by a pin to ensure the normal transmission of torque.

[0020] The eccentric shaft 6 is fixed to the planetary gear bracket 5 by pins, so that the eccentric shaft 6 is not easy to swing up and down during long-term work, the structure is more stable, and the service life of the hydraulic tool is increased. In addition, the pin fixing method is also more convenient in processing and reduces production costs.

[0021] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiment. All technical solutions based on the concept of the present invention are within the scope of protection of the present invention. It should be noted that for those skilled in the art, certain improvements and modifications that do not depart from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. An electric hydraulic tool, characterized in that: The invention comprises a driving device (1), a power device (2) and a working head (3); the power device (2) is provided with a planetary reduction mechanism (4) driven by a motor; the planetary reduction mechanism (4) has a planetary gear support (5); a connecting column is provided at the center of the end of the planetary gear support (5); an eccentric shaft (6) is provided in the driving device (1); a positioning groove (60) is provided at one end of the eccentric shaft (6) close to the planetary gear support (5) and is matched with the connecting column; a latch (7) is passed through the shaft of the eccentric shaft (6); the connecting column through which the latch (7) passes through the positioning groove (60) is used to fix the eccentric shaft (6) to the planetary gear support (5) to realize coaxial torque transmission.

2. An electric hydraulic tool according to claim 1, characterized in that: A first through hole (61) passing through the positioning groove (60) is provided on the outer wall of the eccentric shaft (6), a second through hole (500) adapted to the first through hole (61) is provided on the outer wall of the connecting column, and the latch (7) is located in the first through hole (61) and the second through hole (500).

3. The electric hydraulic tool according to claim 1, characterized in that: The planetary gear support (5) is integrally formed.

4. The electric hydraulic tool according to claim 1, characterized in that: The length of the latch pin (7) is smaller than the diameter of the eccentric shaft (6).

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