Protection mechanism of tightening tool

Abstract

The embodiment of the utility model discloses a protection mechanism of a tightening tool, which comprises a shell, a rotating shaft and a tool fixing shaft, the rear end of the tool fixing shaft is connected with the tightening tool, the front end of the tool fixing shaft is connected with the rear end of the shell, the rotating shaft penetrates through the shell and the tool fixing shaft, and the top of the rotating shaft is connected with the tightening tool. A shaft sleeve is arranged at the upper end of the angular contact ball bearing, a locking nut is arranged between the shaft sleeve and the inner wall of the shell, a sliding sleeve is arranged between the inner side of the bottom of the shell and the rotating shaft, the sliding sleeve is in sliding connection with the rotating shaft, a shaft ring is installed at the bottom of the rotating shaft, and a pushing ring is arranged on the inner side of the sliding sleeve. A spring is arranged between the shaft ring and the pushing ring, a plurality of steel ball holes are formed in the bottom of the rotating shaft, and steel balls are arranged between the inner side of the sliding sleeve and the rotating shaft.

Description

Technical Field

[0001] The utility model relates to the technical field of tightening tools, in particular to a protection mechanism for tightening tools. Background Art

[0002] In current industrial production, two parts are mostly connected using fasteners. Common fasteners include bolts and screws. Currently, tightening is done with tightening tools, which is convenient and labor-saving. Common tightening tools include screwdrivers. The output end of the screwdriver drives the bit to rotate, which in turn drives the screw to rotate, tightening the screw. However, when tightening the screw, the tightening reaction force is transmitted to the screwdriver through the bit. Long-term use of the screwdriver will shorten the life of the screwdriver. At the same time, existing tightening tools are installed on a support and need to be rotated, which causes the cable at the rear end of the tightening tool to rotate and twist, affecting the cable performance. Utility Model Content

[0003] The utility model provides a protection mechanism for a tightening tool, which prevents the force of a screwdriver bit from being transmitted to the tightening tool, thereby protecting the tightening tool.

[0004] To achieve the above objectives, the present invention provides the following technical solutions:

[0005] A protective mechanism for a tightening tool comprises a shell, a rotating shaft and a tool fixing shaft, the rear end of the tool fixing shaft is connected to the tightening tool, the front end of the tool fixing shaft is connected to the rear end of the shell, the rotating shaft passes through the shell and the tool fixing shaft, the top of the rotating shaft is connected to the tightening tool, an angular contact ball bearing is provided between the rotating shaft and the shell, a shaft sleeve is provided at the upper end of the angular contact ball bearing, a locking nut is provided between the shaft sleeve and the inner wall of the shell, a sliding sleeve is provided between the bottom inner side of the shell and the rotating shaft, the sliding sleeve and the rotating shaft are slidably connected, a shaft ring is installed at the bottom of the rotating shaft, a push ring is provided on the inner side of the sliding sleeve, a spring is provided between the shaft ring and the push ring, a plurality of steel ball holes are provided at the bottom of the rotating shaft, and steel balls are provided between the inner side of the sliding sleeve and the rotating shaft.

[0006] Preferably, it further comprises a shaft retaining ring, which is mounted on the rotating shaft and is located at the upper end of the shaft sleeve.

[0007] Preferably, the rotating shaft includes shaft one, a shaft stop, shaft two and shaft three connected in sequence, the inner side of shaft one is provided with a hole one corresponding to the screwdriver bit, the angular contact ball bearing and the sleeve are both installed on shaft two, the angular contact ball bearing is in contact with the upper end surface of the shaft stop, the steel ball hole is located at one end of the shaft, and the end of shaft three is connected to the output end of the tightening tool.

[0008] Preferably, a sliding portion is provided on the inner top of the sliding sleeve, the inner diameter of the sliding portion is equal to the inner diameter of the push ring, a slope is provided on the side of the push ring facing the sliding portion, and two parallel grooves are provided on the outer side of the bottom of the sliding sleeve.

[0009] Preferably, a slot is provided at the bottom of the first shaft, an earless retaining spring is installed at the slot, and the shaft ring is installed at the upper end of the earless retaining spring.

[0010] Preferably, the outer shell includes a lower shell and an upper shell, the outer side of the lower shell is provided with an external thread, the outer shell is provided with a connecting sleeve mounting groove, an angular contact ball bearing mounting groove and a tool fixing shaft mounting groove from bottom to top, and the upper shell is provided with two symmetrical connecting holes, and the connecting hole one is connected to the tool fixing shaft mounting groove.

[0011] Preferably, the tool fixing shaft includes a shell connecting part and a tightening tool connecting part, the tightening tool connecting part is located at the upper end of the shell connecting part, the shell connecting part is provided with two connecting holes 2 corresponding to the connecting hole 1, the inner side of the tightening tool connecting part is provided with an internal thread, the upper shell is sleeved on the shell connecting part, a hinge pin is installed at one of the connecting holes 1 and the connecting hole 2, and a screw is tightened at the other connecting hole 1 and the connecting hole 2.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] The present invention connects the screwdriver bit to the rotating shaft of the present invention, so that the reaction force is first transmitted to the rotating shaft through the screwdriver bit, and then transmitted to the angular contact ball bearing and the locking nut 7. The reaction force is eliminated by the angular contact ball bearing and the locking nut to avoid being transmitted to the tightening tool, thereby protecting the tightening tool 4. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the application of an embodiment of the present utility model.

[0015] Figure 2 It is a schematic diagram of an embodiment of the present utility model.

[0016] Figure 3 It is a cross-sectional view of an embodiment of the present utility model.

[0017] Figure 4 It is a schematic diagram of a sliding sleeve according to an embodiment of the present utility model.

[0018] Figure 5 It is a cross-sectional view of the sliding sleeve of an embodiment of the present utility model.

[0019] Figure 6 It is a schematic diagram of the rotating shaft of an embodiment of the present utility model.

[0020] Figure 7 This is a schematic diagram of the rotating shaft from another perspective of an embodiment of the present invention.

[0021] Figure 8 It is a schematic diagram of the shell of an embodiment of the present utility model.

[0022] Figure 9 It is a cross-sectional view of the shell of an embodiment of the present utility model.

[0023] Figure 10 It is a schematic diagram of the fixed shaft of the tool in the embodiment of the present utility model.

[0024] Figure 11 It is a sectional view of the tool fixing axis of an embodiment of the present utility model.

[0025] Figure 12 It is a schematic diagram of a locking nut according to an embodiment of the present utility model.

[0026] Figure 13 It is a schematic diagram of a batch head in the prior art. DETAILED DESCRIPTION

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

[0028] As shown in the figure, an embodiment of the present utility model discloses a protective mechanism for a tightening tool, including a housing 1, a rotating shaft 2 and a tool fixing shaft 3. The rear end of the tool fixing shaft 3 is connected to the tightening tool 4, and the front end of the tool fixing shaft 3 is connected to the rear end of the housing 1. The rotating shaft 2 passes through the housing 1 and the tool fixing shaft 3. The top of the rotating shaft 2 is connected to the tightening tool 4. An angular contact ball bearing 5 is provided between the rotating shaft 2 and the housing 1. A shaft sleeve 6 is provided at the upper end of the angular contact ball bearing 5. A locking nut 7 is provided between the shaft sleeve 6 and the inner wall of the housing 1. A sliding sleeve 8 is provided between the inner side of the bottom of the housing 1 and the rotating shaft 2. The sliding sleeve 8 is slidably connected to the rotating shaft 2. A shaft ring 9 is installed at the bottom of the rotating shaft 2. A push ring 81 is provided on the inner side of the sliding sleeve 8. A spring 10 is provided between the shaft ring 9 and the push ring 81. A plurality of steel ball holes 201 are provided at the bottom of the rotating shaft 2, and steel balls 11 are provided between the inner side of the sliding sleeve 8 and the rotating shaft 2. The front end of the housing 1 is mounted on the support 17, and the bottom of the existing tightening tool 4 is mounted on the support 17. In this way, through the newly added protection mechanism, the screwdriver bit 13 is connected to the rotating shaft 2, so that the reaction force is first transmitted to the rotating shaft 2 through the screwdriver bit 13, and then transmitted to the angular contact ball bearing 5 and the locking nut 7. The reaction force is eliminated by the angular contact ball bearing 5 and the locking nut 7 to avoid being transmitted to the tightening tool 4, thereby protecting the tightening tool 4.

[0029] The top of the bit 13 is provided with a mounting groove 131. When the steel ball 11 is stuck in the mounting groove 131, the push ring 81 of the sliding sleeve 8 presses the steel ball 11, preventing the steel ball 11 from moving out of the steel ball hole 201. In this way, the steel ball 11 limits the position of the bit 13 and connects it to the rotating shaft 2. When the bit 13 needs to be removed, the sliding sleeve 8 is slid downward, and the push ring 81 of the sliding sleeve 8 separates from the steel ball 11. The bit 13 is pulled downward, and the steel ball 11 is pushed toward the steel ball hole 201 by the bit 13, separating the bit 13 from the rotating shaft 2. After the bit 13 is replaced, the sliding sleeve 8 is released, and the spring 10 resets, pushing the sliding sleeve 8 upward to achieve locking.

[0030] In one embodiment of the present invention, a shaft retaining ring 12 is further included, which is mounted on the rotating shaft 2 and is located at the upper end of the shaft sleeve 6. The shaft retaining ring 12 serves to limit the position of the shaft sleeve 6.

[0031] In one embodiment of the present invention, the rotating shaft 2 includes a first shaft 21, a shaft stop 22, a second shaft 23, and a third shaft 24, which are connected in sequence. The inner side of the first shaft 21 is provided with a first hole 202 corresponding to the screwdriver bit 13. The angular contact ball bearing 5 and the sleeve 6 are both mounted on the second shaft 23. The angular contact ball bearing 5 contacts the upper end surface of the shaft stop 22. The hole for the steel ball 11 is located on the first shaft 21. The end of the third shaft 24 is connected to the output end of the tightening tool 4. The first shaft 21 is connected to the top of the screwdriver bit 13, and the third shaft 24 is connected to the output end of the tightening tool 4 to transmit power to the screwdriver bit 13.

[0032] In one embodiment of the present invention, a sliding portion 82 is provided on the inner top of the sliding sleeve 8. The inner diameter of the sliding portion 82 is equal to that of the push ring 81. The push ring 81 has an inclined surface 83 on the side facing the sliding portion 82. Two parallel grooves 84 are provided on the outer bottom of the sliding sleeve 8. As the sliding sleeve 8 moves, the top surface of the push ring 81 or the inclined surface 83 contacts the steel ball.

[0033] In one embodiment of the present invention, a slot 211 is provided at the bottom of the shaft 1 21, and an earless retaining spring 14 is installed at the slot 211. The collar 9 is installed at the upper end of the earless retaining spring 14. The earless retaining spring 14 serves to install the collar 9.

[0034] In one embodiment of the present invention, the housing 1 comprises a lower housing 101 and an upper housing 102. The outer surface of the lower housing 101 is provided with external threads. From bottom to top, the housing 1 is provided with a connecting sleeve mounting groove 103, an angular contact ball bearing mounting groove 104, and a tool fixing shaft mounting groove 105. The upper housing 102 is provided with two symmetrical connecting holes 106, which communicate with the tool fixing shaft mounting groove 105. The angular contact ball bearing is located in the angular contact ball bearing mounting groove 104, and one end of the tool fixing shaft 3 is located in the tool fixing shaft mounting groove 105. The lower housing 101 is threadedly connected to the support 17.

[0035] In one embodiment of the present invention, the tool fixing shaft 3 includes a housing connection portion 31 and a tightening tool connection portion 32. The tightening tool connection portion 32 is located at the upper end of the housing connection portion 31. The housing connection portion 31 is provided with two second connection holes 311 corresponding to the first connection hole. The inner side of the tightening tool connection portion 32 is provided with an internal thread. The upper shell 102 is sleeved on the housing connection portion 31. A hinge pin 15 is installed at one of the first connection holes 106 and the second connection hole 311, and a set screw 16 is installed at the other connection hole 1 and the second connection hole. The set screw 16 is used for sealing to prevent dust from entering the interior. The two connection holes 106 and the second connection hole 311 here facilitate installation because no matter how the housing is rotated, one of the connection holes 106 and the second connection hole 311 is always in a convenient installation position.

[0036] The present invention can be directly installed on an existing tightening tool. First, unscrew the tightening tool 4 from the support 17. The remaining parts of the present invention, minus the tool fixing shaft 3, are assembled. The tool fixing shaft 3 is then threadedly connected to the tightening tool 4. The housing 1 (where other parts are mounted) is then threadedly connected to the support 17. Finally, the housing 1 and the tool fixing shaft 3 are connected using the hinge pin 15. This installation method eliminates the need to rotate the tightening tool 4 during installation; only the tool fixing shaft 3 needs to be rotated. This prevents the cable at the rear end of the tightening tool 4 from rotating and causing twisting.

[0037] The above content is merely an example and explanation of the structure of the present invention. Technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the structure of the present invention or exceed the scope defined by the claims, they should all fall within the scope of protection of the present invention.

Claims

1. A protection mechanism for a tightening tool, characterized in that: It includes a shell, a rotating shaft and a tool fixing shaft. The rear end of the tool fixing shaft is connected to the tightening tool, the front end of the tool fixing shaft is connected to the rear end of the shell. The rotating shaft passes through the shell and the tool fixing shaft. The top of the rotating shaft is connected to the tightening tool. An angular contact ball bearing is provided between the rotating shaft and the shell. A shaft sleeve is provided at the upper end of the angular contact ball bearing. A locking nut is provided between the shaft sleeve and the inner wall of the shell. A sliding sleeve is provided between the bottom inner side of the shell and the rotating shaft. The sliding sleeve and the rotating shaft are slidably connected. A shaft ring is installed at the bottom of the rotating shaft, a push ring is provided on the inner side of the sliding sleeve, a spring is provided between the shaft ring and the push ring, a plurality of steel ball holes are provided at the bottom of the rotating shaft, and steel balls are provided between the inner side of the sliding sleeve and the rotating shaft.

2. A protection mechanism for a tightening tool according to claim 1, characterized in that: The utility model also comprises a shaft retaining ring, which is installed on the rotating shaft and is located at the upper end of the shaft sleeve.

3. The protection mechanism for a tightening tool according to claim 2, characterized in that: The rotating shaft includes shaft one, a shaft stop, shaft two and shaft three connected in sequence. The inner side of shaft one is provided with a hole one corresponding to the screwdriver bit. The angular contact ball bearing and the sleeve are both installed on shaft two. The angular contact ball bearing is in contact with the upper end surface of the shaft stop. The steel ball hole is located at one end of the shaft. The end of shaft three is connected to the output end of the tightening tool.

4. A protection mechanism for a tightening tool according to claim 3, characterized in that: A sliding portion is provided on the inner top of the sliding sleeve, the inner diameter of the sliding portion is equal to the inner diameter of the push ring, a slope is provided on the side of the push ring facing the sliding portion, and two parallel grooves are provided on the outer side of the bottom of the sliding sleeve.

5. The protection mechanism for a tightening tool according to claim 3, characterized in that: A clamping groove is provided at the bottom of the first shaft, an earless clamping ring is installed at the clamping groove, and a shaft ring is installed on the upper end of the earless clamping ring.

6. The protection mechanism for a tightening tool according to claim 2, characterized in that: The outer shell includes a lower shell and an upper shell. The outer side of the lower shell is provided with an external thread. The outer shell is provided with a connecting sleeve mounting groove, an angular contact ball bearing mounting groove and a tool fixing shaft mounting groove from bottom to top. The upper shell is provided with two symmetrical connecting holes, and the connecting hole one is connected to the tool fixing shaft mounting groove.

7. The protection mechanism for a tightening tool according to claim 6, characterized in that: The tool fixing shaft includes a shell connecting part and a tightening tool connecting part. The tightening tool connecting part is located at the upper end of the shell connecting part. The shell connecting part is provided with two connecting holes 2 corresponding to the connecting hole 1. The inner side of the tightening tool connecting part is provided with an internal thread. The upper shell is sleeved on the shell connecting part. A hinge pin is installed at one of the connecting holes 1 and the connecting hole 2, and a set screw is installed at the other connecting hole 1 and the connecting hole 2.

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