A gear eccentric head for tightening tool

Abstract

The present application discloses a gear eccentric head for tightening tools, belonging to the field of gear eccentric heads. The gear eccentric head comprises a housing, an output head and an input head rotatably mounted inside the two ends of the housing, and a transmission mechanism arranged inside the housing for rotating the output head with the input head; the transmission mechanism comprises an output gear fixedly mounted on the output head, an input gear fixedly mounted on the input head, and at least one transmission gear rotatably arranged inside the housing for connecting the output gear with the input gear, and both ends of the transmission gear are provided with wear-resistant gaskets in contact with the housing. The gear eccentric head can effectively reduce the friction coefficient between the transmission gear and the housing by arranging a wear-resistant gasket between the transmission gear and the housing, thereby improving the transmission efficiency and service life of the transmission gear and ensuring the output accuracy.

Description

Technical Field

[0001] The present application relates to the technical field of gear eccentric heads, and in particular to a gear eccentric head for a tightening tool. Background Art

[0002] The gear eccentric head installed on the tightening tool is used to tighten bolts or hose nuts in narrow spaces that are difficult for ordinary tools to enter, and transmit the torque required for tightening. Generally, the accuracy requirements for the torque output of the gear eccentric head are relatively high, and it is often used in some more important occasions.

[0003] The transmission gear of the existing gear eccentric head is in contact and friction with the housing, which is easy to affect the efficiency of the gear transmission after long-term use, thereby affecting its output accuracy and also affecting the service life of the gear eccentric head.

[0004] Therefore, the present application provides a gear eccentric head for a tightening tool with high transmission efficiency and long service life to solve the above problems. Utility Model Content

[0005] 1. Technical issues to be resolved

[0006] The present application provides a gear eccentric head for a tightening tool, aiming to solve the problems raised in the background technology that the existing gear eccentric head is damaged due to friction of the transmission gear, which easily affects the efficiency of the gear transmission and the service life of the gear eccentric head.

[0007] (II) Technical solution

[0008] To achieve the above-mentioned purpose, the present application provides the following technical solution: a gear eccentric head for a tightening tool, comprising a shell, an output head and an input head rotatably mounted inside the two ends of the shell respectively, and a transmission mechanism arranged inside the shell for making the output head rotate with the input head; the transmission mechanism comprises an output gear fixedly mounted on the output head, an input gear fixedly mounted on the input head, and at least one transmission gear rotatably arranged inside the shell for connecting the output gear with the input gear.

[0009] In order to reduce the friction coefficient between the transmission gear and the housing and improve the transmission efficiency and service life of the gear eccentric head, different from the prior art, both ends of the transmission gear are provided with wear-resistant gaskets in contact with the housing. By providing the wear-resistant gasket between the transmission gear and the housing, the friction coefficient between the transmission gear and the housing is reduced, thereby improving the efficiency and service life of the gear transmission and ensuring the output accuracy.

[0010] Moreover, during use, the friction between the gears can be reduced by applying lubricating oil between the input gear, the output gear and the transmission gear. In this way, the friction between the gears can be reduced. When the wear-resistant gasket contacts the lubricating oil, the wear-resistant gasket, the transmission gear and the housing can be lubricated, which can further reduce the friction coefficient of the transmission gear, thereby improving the transmission efficiency of the gear and ensuring the service life of the gear eccentric head.

[0011] Preferably, the shell includes a lower shell and an upper shell covering the lower shell, one end of the output head passes through the lower shell, and one end of the input head passes through the upper shell.

[0012] Preferably, a first spline groove is formed at one end of the output head close to the lower shell, and a second spline groove is formed at one end of the input head close to the upper shell.

[0013] Preferably, a first bolt threadedly connected to the upper housing is provided at an outer position of the lower housing corresponding to the input gear, and a second bolt threadedly connected to the lower housing is provided at an outer position of the upper housing corresponding to the transmission gear.

[0014] Preferably, the housing, the output gear and the output head are provided with openings communicating with the first spline groove.

[0015] (III) Beneficial effects

[0016] The gear eccentric head can effectively reduce the friction coefficient between the transmission gear and the housing by arranging a wear-resistant gasket between the transmission gear and the housing, thereby improving the transmission efficiency and service life of the transmission gear and ensuring output accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic structural diagram of a gear eccentric head for a tightening tool in Example 1;

[0018] Figure 2 This is a schematic diagram of the exploded structure of a gear eccentric head for a tightening tool in Example 1;

[0019] Figure 3 This is a schematic structural diagram of a gear eccentric head for a tightening tool in Example 2;

[0020] Figure 4 This is a schematic diagram of the exploded structure of a gear eccentric head for a tightening tool in Example 2.

[0021] In the figure:

[0022] 1. Shell; 11. Lower shell; 12. Upper shell;

[0023] 2. Output head; 21. First spline groove;

[0024] 3. Input head; 31. Second spline groove;

[0025] 4. Transmission mechanism; 41. Output gear; 42. Input gear; 43. Transmission gear; 431. Wear-resistant gasket;

[0026] 5. Speak. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0028] Example 1

[0029] This embodiment provides a gear eccentric head for a tightening tool, such as Figure 1 and Figure 2 As shown, the gear eccentric head comprises a housing 1, an output head 2 and an input head 3 rotatably mounted inside the two ends of the housing 1, and a transmission mechanism 4 arranged inside the housing 1 for making the output head 2 rotate with the input head 3;

[0030] The transmission mechanism 4 includes an output gear 41 fixedly mounted on the output head 2, an input gear 42 fixedly mounted on the input head 3, and at least one transmission gear 43 rotatably arranged inside the housing 1 for connecting the output gear 41 with the input gear 42, and wear-resistant gaskets 431 in contact with the housing 1 are arranged at both ends of the transmission gear 43.

[0031] When in use, after connecting the output head 2 of the gear eccentric head to the workpiece to be tightened, connect the tightening tool to the input head 3 of the gear eccentric head, and drive the input head 3 to rotate through the tightening tool, and drive the output gear 41 to rotate under the action of the input gear 42 and the transmission gear 43, thereby driving the output head 2 to rotate for tightening operation.

[0032] The wear-resistant gasket 431 is used to reduce the friction between the transmission gear 43 and the housing 1 , thereby effectively reducing the wear of the transmission gear 43 , improving the transmission efficiency and service life of the transmission gear 43 , and ensuring the transmission accuracy of the transmission gear 43 .

[0033] Specifically, the housing 1 includes a lower housing 11 and an upper housing 12 covering the lower housing 11, one end of the output head 2 passes through the lower housing 11, and one end of the input head 3 passes through the upper housing 12. In order to facilitate the tightening tool and tightening operation, a first spline groove 21 is provided at one end of the output head 2 close to the lower housing 11, and a second spline groove 31 is provided at one end of the input head 3 close to the upper housing 12.

[0034] Furthermore, in order to ensure the stability of the connection between the upper shell 12 and the lower shell 11, a first bolt 13 screwed to the upper shell 12 is provided at an outer position of the lower shell 11 corresponding to the input gear 42, and a second bolt 14 screwed to the lower shell 11 is provided at an outer position of the upper shell 12 corresponding to the transmission gear 43.

[0035] Example 2

[0036] Different from Example 1, Figure 3 and Figure 4 As shown, the housing 1, the output gear 41 and the output head 2 are provided with an opening 5 connected to the first spline groove 21. The end of the output gear 41 is open, which can facilitate the workpiece to be tightened to enter the first spline groove 21 on the output head 2, so that the gear eccentric head can be conveniently used in a narrower space.

[0037] The above is only a preferred specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can make equivalent substitutions or changes within the technical scope disclosed in the present application according to the technical solution and application concept of the present application, which should be covered by the protection scope of the present application.

Claims

1. A gear eccentric head for a tightening tool, comprising a housing (1), an output head (2) and an input head (3) rotatably mounted inside two ends of the housing (1), and a transmission mechanism (4) arranged inside the housing (1) for causing the output head (2) to rotate along with the input head (3); The transmission mechanism (4) comprises an output gear (41) fixedly mounted on the output head (2), an input gear (42) fixedly mounted on the input head (3), and at least one transmission gear (43) rotatably arranged inside the housing (1) for connecting the output gear (41) with the input gear (42); Features: Both ends of the transmission gear (43) are provided with wear-resistant gaskets (431) in contact with the housing (1).

2. The gear eccentric head for a tightening tool according to claim 1, characterized in that: The housing (1) comprises a lower housing (11) and an upper housing (12) covering the lower housing (11); one end of the output head (2) passes through the lower housing (11); and one end of the input head (3) passes through the upper housing (12).

3. The gear eccentric head for a tightening tool according to claim 2, characterized in that: A first spline groove (21) is formed at one end of the output head (2) close to the lower shell (11), and a second spline groove (31) is formed at one end of the input head (3) close to the upper shell (12).

4. The gear eccentric head for a tightening tool according to claim 2, characterized in that: A first bolt (13) threadedly connected to the upper housing (12) is provided at an outer position of the lower housing (11) corresponding to the input gear (42), and a second bolt (14) threadedly connected to the lower housing (11) is provided at an outer position of the upper housing (12) corresponding to the transmission gear (43).

5. The gear eccentric head for a tightening tool according to claim 3, characterized in that: The housing (1), the output gear (41) and the output head (2) are provided with an opening (5) which is in communication with the first spline groove (21).

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