Electric pre-tightening tool for automobile tire nut

Abstract

The utility model discloses an electric pre-tightening tool for an automobile tire nut, and belongs to the technical field of automobile assembly. The device mainly comprises a shell, a driving gear, a linkage gear, an inner gear ring, an outer gear ring, a fastening gear and a fastening shaft, and is characterized in that the shell is composed of a disc body and a cover plate; the driving gear is installed on one side of the disc body and meshed with the linkage gear adjacent to the driving gear. The inner gear ring is arranged on the outer sides of the driving gear and the linkage gear in a sleeving mode, and a plurality of elastic plates are installed on the outer side wall of the inner gear ring; the outer gear ring is arranged on the outer side of the inner gear ring in a sleeving mode and abuts against the elastic plate. According to the utility model, a plurality of sleeves are arranged, so that a plurality of nuts can be fastened at the same time; and a multi-stage gear transmission structure is arranged inside, so that the fastening torque value can be effectively increased. And meanwhile, an overload protection structure is assembled in the wrench, so that the wrench can be prevented from being damaged due to overload. The automobile tire assembling machine is mainly used for assembling automobile tires.

Description

Technical Field

[0001] The utility model belongs to the technical field of automobile assembly, and in particular relates to an electric pre-tightening tool for automobile tire nuts. Background Art

[0002] On the automobile assembly line, when tightening the nuts of automobile tires, a single-axis electric wrench is usually used to pre-install and tighten the nuts of the tires in sequence. This traditional tightening method not only takes a lot of time, but the torque value of the single-axis electric wrench is generally low, resulting in a long tightening time. Multiple factors have a serious impact on work efficiency. At the same time, the traditional single-axis electric wrench is not equipped with an overload protection function. After completing the tightening of the nut, if it is not stopped in time, it may cause damage to the gears in the electric wrench. Utility Model Content

[0003] The technical problem to be solved by the utility model is: to overcome the shortcomings of the prior art and provide an electric pre-tightening tool for automobile tire nuts, which is equipped with multiple synchronously rotating and detachable sleeves, and can complete the tightening of multiple nuts at the same time; and is equipped with a multi-stage gear transmission structure inside, which can effectively increase the tightening torque value and effectively improve the work efficiency of the nut tightening work. At the same time, an overload protection structure is also installed inside to prevent the wrench from being damaged due to overload.

[0004] The electric pre-tightening tool for automobile tire nuts includes a shell, a driving gear, a connecting gear, an inner gear ring, an outer gear ring, a fastening gear, and a fastening shaft, wherein the shell is composed of a disk body and a cover plate, wherein the side of the disk body is provided with a plurality of arc grooves protruding outward; the driving gear is installed on one side of the disk body and meshes with the connecting gear arranged adjacent to it; the inner gear ring is sleeved on the outside of the driving gear and the connecting gear and meshes with the connecting gear, and a plurality of elastic plates are installed on the outer side wall of the inner gear ring; the outer gear ring is sleeved on the outside of the inner gear ring and abuts against the elastic plate; a plurality of fastening gears are provided, which are respectively embedded in the arc grooves and meshed with the outer gear ring; one end of the fastening shaft is connected to the fastening gear, and the other end protrudes to the side of the disk body away from the fastening gear.

[0005] Preferably, a plurality of slots are provided on the outer edge of the inner gear ring facing away from the driving gear, and both ends of the slots extend obliquely toward the inner wall of the inner gear ring.

[0006] Preferably, the elastic plate is embedded in the slot, and both ends of the elastic plate extend along the oblique direction of the slot to perform telescopic movement.

[0007] Preferably, a plurality of synapses adapted to the elastic plate are provided on a side of the outer gear ring facing the inner gear ring.

[0008] Preferably, the fastening shaft protrudes to one end of the disc body away from the fastening gear and is drilled with a telescopic through groove.

[0009] Preferably, a detachable sleeve is installed at one end of the fastening shaft, and one end of the sleeve facing the disc body is movably connected to the telescopic through groove.

[0010] Preferably, it also includes a driving shaft, one end of which is connected to the driving gear, and the other end of which protrudes to a side of the cover plate away from the disk body.

[0011] Preferably, a bearing is installed in the middle of the driving shaft, and the outer side wall of the bearing is connected to the cover plate.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. Equipped with multiple synchronously rotating and detachable sleeves, it can complete the tightening of multiple nuts at the same time, so as to improve work efficiency and save physical output.

[0014] 2. Equipped with a multi-stage gear transmission structure, it can effectively increase the tightening torque value and effectively improve the work efficiency of nut tightening work.

[0015] 3. Equipped with an overload protection structure to prevent the wrench from being damaged due to overload. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is the front view of the utility model;

[0017] Figure 2 It is a rear view of the utility model;

[0018] Figure 3 It is a schematic diagram of the assembly of the utility model;

[0019] Figure 4 It is a schematic diagram of the internal structure of the utility model;

[0020] Figure 5 It is a schematic diagram of the connection between the inner gear ring and the outer gear ring of the utility model;

[0021] Figure 6 This is a schematic diagram of the structure of the internal gear ring of the utility model;

[0022] Figure 7 This is a schematic diagram of the structure of the outer gear ring of the utility model;

[0023] Figure 8 This is a schematic diagram of the fastening shaft connection relationship of the utility model;

[0024] Fig. 9 It is a schematic diagram of the assembly of the drive shaft and the bearing of the utility model.

[0025] In the figure, 100, shell; 101, disk; 102, cover plate; 103, arc groove; 110, driving gear; 111, connecting gear; 120, inner gear ring; 121, elastic plate; 122, slot; 130, outer gear ring; 131, synapse; 140, fastening gear; 150, fastening shaft; 160, sleeve; 170, driving shaft; 171, bearing. DETAILED DESCRIPTION

[0026] The utility model is further described below in conjunction with the accompanying drawings:

[0027] The directional nouns involved in the detailed description paragraphs are only for the convenience of those skilled in the art to understand the technical solutions described in this application according to the visual orientation shown in the accompanying drawings. Unless otherwise clearly specified and limited, the terms "setting", "installation", "connection", etc. should be understood in a broad sense. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0028] like Figures 1 to 8 As shown, the electric pre-tightening tool for automobile tire nuts includes a housing 100, a driving gear 110, a linkage gear 111, an inner gear ring 120, an outer gear ring 130, a fastening gear 140, and a fastening shaft 150, characterized in that: the housing 100 is composed of a disk body 101 and a cover plate 102, wherein the side of the disk body 101 is provided with a plurality of arc grooves 103 protruding outward; the driving gear 110 is installed on one side of the disk body 101 and meshes with the linkage gear 111 arranged adjacent to it; the inner gear ring 120 is sleeved It is arranged on the outside of the driving gear 110 and the connecting gear 111, and meshes with the connecting gear 111, and a plurality of elastic plates 121 are installed on the outer wall of the inner gear ring 120; the outer gear ring 130 is sleeved on the outside of the inner gear ring 120, and abuts against the elastic plates 121; a plurality of fastening gears 140 are provided, which are respectively embedded in the arc groove 103 and meshed with the outer gear ring 130; one end of the fastening shaft 150 is connected to the fastening gear 140, and the other end protrudes to the side of the disk body 101 away from the fastening gear 140.

[0029] Optionally, a rotating rod is fixed in the housing 100, located on one side of the driving gear 110. In this way, the rotating rod has a limiting effect on the linkage gear 111, so that the linkage gear 111 can always rotate in mesh with the driving gear 110 and the inner gear ring 120 at a fixed position, thereby preventing the linkage gear 111 from rotating randomly in the housing 100 and causing damage to other components, thereby improving the overall service life of the device.

[0030] like Figures 3 to 6As shown, the outer edge of the inner gear ring 120 facing away from the driving gear 110 is provided with a plurality of slots 122, and both ends of the slots 122 extend obliquely toward the inner wall of the inner gear ring 120. In this way, the elastic plate 121 can be movably embedded in the slot through the slots 122. When the elastic plate 121 rotates under the drive of the inner gear ring 120, the elastic plate 121 will abut against the inner side of the outer gear ring 130, and a resistance force will be generated between the two, so as to drive the outer gear ring 130 to rotate synchronously with the inner gear ring 120.

[0031] like Figures 3 to 6 As shown, the elastic plate 121 is embedded in the slot 122, and the two ends of the elastic plate 121 are extended and retracted along the oblique extension of the slot 122. In this way, when the outer gear ring 130 stops during the rotation, the inner gear ring 120 continues to rotate, so that the extrusion force of the elastic plate 121 and the outer gear ring 130 at the abutment position increases. When the extrusion force exceeds the bending resistance of the elastic plate 121, the elastic plate 121 shrinks into the slot 122 under the action of the extrusion force. Until the abutment position of the elastic plate 121 and the outer gear ring 130 is disengaged, the elastic plate 121 is reset to the initial position. This connection method can play a good protective role in the meshing of the driving gear 110, the interlocking gear 111 and the inner gear ring 120 after the outer gear ring 130 stops, and avoids damage to the driving gear 110, the interlocking gear 111 and the inner gear ring 120 due to the sudden stop of the outer gear ring 130. Thereby effectively improving the service life of the device.

[0032] like Figure 7 As shown, the outer gear ring 130 is provided with a plurality of synapses 131 adapted to the elastic plate 121 on the side facing the inner gear ring 120. In this way, the synapses 131 provided on the inner side of the outer gear ring 130 can block the elastic plate 121 installed on the side wall of the inner gear ring 120 during its rotation, and abutment is formed between the two, so that the outer gear ring 130 can be driven by the elastic plate 121 and rotate synchronously with the inner gear ring 120.

[0033] like Figure 7 As shown, the fastening shaft 150 protrudes to the end of the disc body 101 away from the fastening gear 140, and is drilled with a telescopic through slot. In this way, through the telescopic through slot, the nut heights of different fastening positions can be adapted, and there is no need to adjust the nut heights to the same height, thereby improving the overall applicability of the device.

[0034] like Figure 8 As shown, a detachable sleeve 160 is installed at one end of the fastening shaft 150, and the end of the sleeve 160 facing the disc body 101 is movably connected to the telescopic through slot. In this way, the sleeve 160 installed at the front end of the fastening shaft 150 can move freely along the telescopic through slot to adapt to the height of the self-adapting nut.

[0035] like Fig. 9 As shown, the drive shaft 170 is also included, one end of which is connected to the drive gear 110, and the other end protrudes to the side of the cover plate 102 away from the disk body 101. In this way, the end of the drive shaft 170 protruding outward can be connected to the drive device, so that the drive gear 110 and the drive device are linked through the drive shaft 170. Thus, the drive gear 110 is driven to rotate.

[0036] like Fig. 9 As shown, a bearing 171 is installed in the middle of the drive shaft 170, and the outer wall of the bearing 171 is connected to the cover plate 102. In this way, the bearing 171 can avoid contact and wear between the drive shaft 170 and the cover plate 102, so as to improve the service life of the drive shaft 170 and the cover plate 102. Secondly, the bearing 171 can play a positioning role for the drive shaft 170, so that the drive shaft 170 can always rotate on the same axis, avoiding displacement of the drive shaft 170 during the rotation process and polarization.

[0037] Finally, although this specification is described according to implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. An electric pre-tightening tool for automobile tire nuts, comprising a housing (100), a driving gear (110), a linkage gear (111), an inner gear ring (120), an outer gear ring (130), a fastening gear (140), and a fastening shaft (150), characterized in that: The housing (100) is composed of a disk body (101) and a cover plate (102), wherein the side of the disk body (101) is provided with a plurality of arc-shaped grooves (103) protruding outward; the driving gear (110) is mounted on one side of the disk body (101) and meshes with a linkage gear (111) disposed adjacent thereto; the inner gear ring (120) is sleeved on the outside of the driving gear (110) and the linkage gear (111) and meshes with the linkage gear (111), and the inner gear ring (120) is provided on the outside of the driving gear (110) and the linkage gear (111) and meshes with the linkage gear (111). 0) is provided with a plurality of elastic plates (121); the outer toothed ring (130) is sleeved on the outer side of the inner toothed ring (120) and abuts against the elastic plate (121); a plurality of fastening gears (140) are provided, which are respectively embedded in the arc groove (103) and meshed with the outer toothed ring (130); one end of the fastening shaft (150) is connected to the fastening gear (140), and the other end protrudes to a side of the disc body (101) away from the fastening gear (140).

2. The electric pre-tightening tool for automobile tire nuts according to claim 1, characterized in that: A plurality of slots (122) are provided at the outer edge of the inner gear ring (120) on the side facing away from the driving gear (110), and both ends of the slots (122) extend obliquely toward the inner wall of the inner gear ring (120).

3. The electric pre-tightening tool for automobile tire nuts according to claim 2, characterized in that: The elastic plate (121) is embedded in the slot (122), and two ends of the elastic plate (121) extend along the oblique direction of the slot (122) to perform telescopic movement.

4. The electric pre-tightening tool for automobile tire nuts according to claim 1, characterized in that: A plurality of synapses (131) adapted to the elastic plate (121) are provided on a side of the outer gear ring (130) facing the inner gear ring (120).

5. The electric pre-tightening tool for automobile tire nuts according to claim 1, characterized in that: The fastening shaft (150) protrudes to one end of the disc body (101) away from the fastening gear (140) and is drilled with a telescopic through groove (151).

6. The electric pre-tightening tool for automobile tire nuts according to claim 5, characterized in that: A detachable sleeve (160) is mounted on one end of the fastening shaft (150), and one end of the sleeve (160) facing the disc body (101) is movably connected to the telescopic through slot (151).

7. An electric pre-tightening tool for automobile tire nuts according to any one of claims 1 to 6, characterized in that: It also includes a driving shaft (170), one end of which is connected to the driving gear (110), and the other end of which protrudes to a side of the cover plate (102) away from the disk body (101).

8. The electric pre-tightening tool for automobile tire nuts according to claim 7, characterized in that: A bearing (171) is installed in the middle of the driving shaft (170), and an outer side wall of the bearing (171) is connected to the cover plate (102).

Images