An open bolt tightening device

Abstract

The application discloses an open bolt tightening device, and belongs to the field of tightening devices. The bolt tightening device comprises a shell, an input shaft and an output joint rotatably installed at two ends of the shell respectively, and a transmission component arranged in the interior of the shell and used for connecting the output joint and the input shaft. The transmission component comprises an input gear and an output gear fixedly sleeved on the input shaft and the output joint respectively, a first transmission gear rotatably installed in the interior of the shell and engaged with the input gear, and a second transmission gear rotatably installed in the interior of the shell and engaged with the first transmission gear and the output gear. The output joint and the output gear are provided with a first opening matched with a bolt. A second opening for the bolt to enter the first opening is formed in the shell. The bolt tightening device can realize the resetting work of the first opening by reversing the electric tool, and does not need to be manually reset. The precision of the resetting of the first opening can be ensured, and the bolt tightening device is convenient to use.

Description

Technical Field

[0001] This application relates to the field of tightening device technology, specifically an open-type bolt tightening device. Background Technology

[0002] In the installation of mechanical parts, a large number of bolts are required for fixing. Tightening bolts or nuts mainly relies on wrenches of the same type. However, when dealing with tightening operations in confined spaces, the special shape of the wrench makes it difficult to rotate internally. Therefore, a gear-driven eccentric head is generally used to tighten bolts or nuts in confined spaces that are difficult for ordinary tools to access, transmitting the necessary torque to achieve the tightening of bolts or nuts in narrow spaces.

[0003] Chinese utility model patent application number 202420473630X discloses a gear eccentric head for tightening tools. By creating openings in the housing, output gear, and output head, it facilitates the entry of the workpiece to be tightened into the spline groove of the output head, thus enabling the gear eccentric head to be used in more confined spaces. However, since the output head and output gear rotate on the housing, the openings on the output head and output gear shift with their rotation. Before tightening, the operator needs to confirm and manually adjust these openings, which is inconvenient to use and makes it difficult to guarantee the accuracy of the opening positions after adjustment.

[0004] Therefore, this application provides an open-type bolt tightening device to solve the above-mentioned problems. Utility Model Content

[0005] This application provides an open-type bolt tightening device, which aims to solve the problem mentioned in the background art that the openings on the output head and output gear of the existing gear eccentric head need to be manually adjusted to correspond with the openings on the housing, which is inconvenient to use and makes it difficult to guarantee the accuracy of adjustment.

[0006] To achieve the above objectives, this application provides the following technical solution: an open-type bolt tightening device, comprising a housing, an input shaft and an output connector respectively rotatably mounted at both ends of the housing, and a transmission component disposed inside the housing for connecting the output connector to the input shaft. The transmission component includes an input gear and an output gear respectively fixedly mounted on the input shaft and the output connector, a first transmission gear rotatably mounted inside the housing and meshing with the input gear, and a second transmission gear rotatably mounted inside the housing and meshing with the first transmission gear and the output gear. The output connector and the output gear have a first opening adapted to the bolt, and the housing has a second opening for the bolt to enter the first opening. To facilitate adjustment of the position of the first opening so that it corresponds to the second opening before being fitted onto the workpiece to be tightened, an arc-shaped block is fixedly mounted at one end of the first transmission gear, a limiting block is hinged inside the housing, and a spring piece is fixedly disposed inside the housing for bringing the end of the limiting block away from the housing closer to the arc-shaped block. The arc-shaped block includes a first end and a second end for abutting against the end of the limiting block away from the housing, so that the first opening corresponds to the second opening. In this way, during adjustment, the input gear drives the first transmission gear to rotate, and the second transmission gear drives the output gear to rotate, thus causing the first opening to rotate with the output connector and the output gear. When the second end of the arc-shaped block contacts the end of the limiting block away from the housing, the end of the limiting block away from the housing abuts against the second end of the arc-shaped block, preventing the arc-shaped block from rotating in that direction. Consequently, the first transmission gear, the second transmission gear, the output gear, and the output connector are also prevented from rotating in that direction, thus aligning the position of the first opening with the position of the second opening.

[0007] Preferably, there are two second transmission gears, which are symmetrically arranged between the output gear and the first transmission gear, and the second transmission gear meshes with the first transmission gear and the output gear.

[0008] Preferably, the tightening device further includes a connector disposed on the housing for connecting the input shaft to the electric gun.

[0009] Preferably, the connector includes a sleeve disposed on the housing near the input shaft, a connecting shaft rotatably mounted in the sleeve, a first bevel gear fixedly mounted on the input shaft, and a second bevel gear fixedly mounted on the connecting shaft and meshing with the first bevel gear. The end of the connecting shaft away from the second bevel gear has a spline for insertion into the output shaft of the electric gun.

[0010] Preferably, a bearing that connects to the sleeve is fitted onto the connecting shaft.

[0011] Preferably, the interior of the housing is provided with a needle roller disc for contacting the first bevel gear.

[0012] This bolt tightening device has a simple structure and is easy to use. By setting a limit block, an arc block and a spring, it can use the reverse rotation of the input shaft during the tightening operation to align the openings on the output connector and output gear with the openings on the housing, which can facilitate the precise reset of the openings on the output connector and output gear. Attached Figure Description

[0013] Figure 1 A schematic diagram of an open-type bolt tightening device;

[0014] Figure 2 Explosion-proof diagram of an open-type bolt tightening device Figure 1 ;

[0015] Figure 3 Explosion-proof diagram of an open-type bolt tightening device Figure 2 ;

[0016] Figure 4 This is a schematic diagram showing the state and structure of the transmission components during the tightening operation;

[0017] Figure 5 This is a schematic diagram of the state structure of the transmission component when the first opening is reset.

[0018] In the picture:

[0019] 1. Shell;

[0020] 11. Second opening;

[0021] 12. Limit block;

[0022] 13. Shrapnel;

[0023] 14. Needle roller disc;

[0024] 2. Input axis;

[0025] 3. Output connector;

[0026] 4. Transmission components;

[0027] 41. Input gear;

[0028] 42. Output gear;

[0029] 43. First transmission gear;

[0030] 431. Arc-shaped block;

[0031] 431a, First end;

[0032] 431b, Second end;

[0033] 44. Second transmission gear;

[0034] 5. First opening;

[0035] 6. Connectors;

[0036] 61. Sleeve;

[0037] 62. Connecting shaft;

[0038] 621. Spline;

[0039] 622. Bearings;

[0040] 63. First bevel gear;

[0041] 64. Second bevel gear. Detailed Implementation

[0042] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0043] Example 1

[0044] This embodiment provides an open-type bolt tightening device, such as... Figure 1 , Figure 2 and Figure 3 As shown, the bolt tightening device includes a housing 1, an input shaft 2 and an output connector 3 rotatably mounted at both ends of the housing 1, and a transmission component 4 disposed inside the housing 1 for connecting the output connector 3 to the input shaft 2. The transmission component 4 includes an input gear 41 and an output gear 42 fixedly mounted on the input shaft 2 and the output connector 3, a first transmission gear 43 rotatably mounted inside the housing 1 and meshing with the input gear 41, and a second transmission gear 44 rotatably mounted inside the housing 1 and meshing with the first transmission gear 43 and the output gear 42. The output connector 3 and the output gear 42 have a first opening 5 adapted to the bolt, and the housing 1 has a second opening 11 for the bolt to enter the first opening 5.

[0045] Unlike existing gear eccentric heads, one end of the first transmission gear 43 is fixedly mounted with an arc-shaped block 431, and a limiting block 12 is hinged inside the housing 1. A spring piece 13 is fixedly provided inside the housing 1 to bring the end of the limiting block 12 away from the housing 1 closer to the arc-shaped block 431. The arc-shaped block 431 includes a first end 431a and a second end 431b for abutting against the end of the limiting block 12 away from the housing 1, so that the first opening 5 corresponds to the second opening 11.

[0046] like Figure 5 As shown, during adjustment, the input shaft 2 is driven to rotate counterclockwise by the torque input device (electric gun). The input gear 41 rotates counterclockwise with the input shaft 2, which drives the first transmission gear 43 to rotate clockwise, thereby driving the second transmission gear 44 to rotate counterclockwise, which in turn drives the output gear 42 to rotate clockwise. This causes the output connector 3 to rotate clockwise with the output gear 42, which in turn causes the first opening 5 to rotate with the output connector 3 and the output gear 42. When the second end 431b contacts the limiting block 12, the end of the limiting block 12 away from the housing 1 presses against the first end 431b, restricting the arc-shaped block 431 from continuing to rotate clockwise. At this time, the position of the first opening 5 corresponds to the position of the second opening 2.

[0047] like Figure 4 As shown, during the tightening operation, the output connector 3 is fitted onto the workpiece to be tightened. The torque input device drives the input shaft 2 to rotate clockwise. The input gear 41 rotates clockwise with the input shaft 2, which drives the first transmission gear 43 to rotate counterclockwise, thereby driving the second transmission gear 44 to rotate clockwise, and then driving the output gear 42 to rotate counterclockwise, thus realizing the tightening operation of the workpiece to be tightened.

[0048] It should be noted that during the tightening operation, when the first end 431a of the arc-shaped block 431 contacts the side of the limiting block 12 near the second transmission gear 43, it pushes the end of the limiting block 12 away from the housing 1 to rotate away from the arc-shaped block 431. When the first end 431a disengages from the limiting block 12, the limiting block 12 is reset under the elastic force of the spring piece 13, so that it can restrict the second end 431b when the arc-shaped block 431 rotates clockwise.

[0049] It is worth mentioning that, in order to ensure that the kinetic energy on the first transmission gear 43 can be stably transmitted to the output gear 42; such as Figure 2 and Figure 3 As shown, there are two second transmission gears 44, which are symmetrically arranged between the output gear 42 and the first transmission gear 43, and the second transmission gears 44 mesh with the first transmission gear 43 and the output gear 42.

[0050] It is understood that the output gear 42 has a first opening 5. When the opening 5 faces one of the second transmission gears 44, the second transmission gear 44 disengages from the output gear 42, while the other second transmission gear 44 remains engaged with the output gear 42 to transmit power, thereby ensuring the stability of kinetic energy transmission.

[0051] Example 2

[0052] like Figure 1 , Figure 2 and Figure 3 As shown, in order to connect the input shaft 2 to the electric gun and drive the input shaft 2, unlike Embodiment 1, the tightening device also includes a connector 6 disposed on the housing 1 for connecting the input shaft 2 to the electric gun.

[0053] Specifically, the connector 6 includes a sleeve 61 disposed at one end of the housing 1 near the input shaft 2, a connecting shaft 62 rotatably mounted within the sleeve 61, a first bevel gear 63 fixedly mounted on the input shaft 2, and a second bevel gear 64 fixedly mounted on the connecting shaft 62 and meshing with the first bevel gear 63. The end of the connecting shaft 62 away from the second bevel gear 64 has a spline 621 for insertion into the output shaft of the electric gun. A bearing 612, which connects with the sleeve 61, is mounted on the connecting shaft 62. A needle roller 14 for contacting the first bevel gear 63 is disposed inside the housing 1.

[0054] When in use, the spline groove of the electric gun's output shaft is fitted onto spline 621. For example... Figure 5 As shown, during adjustment, the electric gun drives the connecting shaft 62 to rotate clockwise. The second bevel gear 64 rotates clockwise with the connecting shaft 62, driving the first bevel gear 63 to rotate counterclockwise, thereby driving the input shaft 2 to rotate counterclockwise, transmitting the adjustment power to the input shaft 2. Figure 4 As shown, during the tightening operation, the electric gun drives the connecting shaft 62 to rotate counterclockwise, the second bevel gear 64 rotates counterclockwise with the connecting shaft 62, drives the first bevel gear 63 to rotate clockwise, drives the input shaft 2 to rotate clockwise, and transmits the power of the tightening operation to the input shaft 2.

[0055] It is worth mentioning that the connector 6 is located in the length direction of the housing 1. When the housing 1 is inserted into a narrow space, the connector 6 and the input end of the electric gun can be inserted into the narrow space, thereby enabling the tightening operation of bolts or nuts in a deeper narrow space.

[0056] The above description is merely a preferred embodiment of this application, but the scope of protection of this application is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this application, based on the technical solution and concept of this application, should be included within the scope of protection of this application.

Claims

1. An open-type bolt tightening device, comprising a housing (1), an input shaft (2) and an output connector (3) respectively rotatably mounted at both ends of the housing (1), and a transmission component (4) disposed inside the housing (1) for connecting the output connector (3) to the input shaft (2), the transmission component (4) comprising an input gear (41) and an output gear (42) respectively fixedly mounted on the input shaft (2) and the output connector (3), a first transmission gear (43) rotatably mounted inside the housing (1) and meshing with the input gear (41), and a second transmission gear (44) rotatably mounted inside the housing (1) and meshing with the first transmission gear (43) and the output gear (42); the output connector (3) and the output gear (42) have a first opening (5) adapted to the bolt, and the housing (1) has a second opening (11) for the bolt to enter the first opening (5); Its features are: An arc-shaped block (431) is fixedly installed at one end of the first transmission gear (43), and a limiting block (12) is hinged inside the housing (1). A spring piece (13) is fixedly provided inside the housing (1) to make the end of the limiting block (12) away from the housing (1) approach the arc-shaped block (431). The arc-shaped block (431) includes a first end (431a) and a second end (431b) for abutting against the end of the limiting block (12) away from the housing (1), so that the first opening (5) corresponds to the second opening (11).

2. The open-type bolt tightening device according to claim 1, characterized in that: There are two second transmission gears (44), which are symmetrically arranged between the output gear (42) and the first transmission gear (43), and the second transmission gears (44) mesh with the first transmission gear (43) and the output gear (42).

3. The open-type bolt tightening device according to claim 1, characterized in that: The tightening device also includes a connector (6) disposed on the housing (1) for connecting the input shaft (2) to the electric gun.

4. The open-type bolt tightening device according to claim 3, characterized in that: The connector (6) includes a sleeve (61) disposed on one end of the housing (1) near the input shaft (2), a connecting shaft (62) rotatably mounted in the sleeve (61), a first bevel gear (63) fixedly mounted on the input shaft (2), and a second bevel gear (64) fixedly mounted on the connecting shaft (62) and meshing with the first bevel gear (63). The end of the connecting shaft (62) away from the second bevel gear (64) has a spline (621) for insertion into the output shaft of the electric gun.

5. The open-type bolt tightening device according to claim 4, characterized in that: The connecting shaft (62) is fitted with a bearing (612) that is connected to the sleeve (61).

6. The open-type bolt tightening device according to claim 4, characterized in that: The housing (1) is provided with a needle roller disc (14) for contacting the first bevel gear (63).

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