Street lamp arm mounting device

Abstract

The utility model discloses a street lamp arm mounting device, and particularly relates to the technical field of mounting devices, which comprises a lamp post, a base is fixed at the bottom of the lamp post, a lamp arm mounting mechanism is fixed on the outer side wall of the lamp post, a lamp arm is mounted in the lamp arm mounting mechanism, and the lamp arm is mounted on the base. A street lamp mechanism is fixed to the end, away from the lamp arm mounting mechanism, of the lamp arm, a user lifts a block to the position of a circular ring, a second crank is shaken, the second crank drives a first rotating rod and two bevel gears A to rotate, the bevel gears A drive bevel gears B to rotate, the bevel gears B drive screws to rotate, and the street lamp mechanism is fixed to the end, away from the lamp arm mounting mechanism, of the lamp arm. And the threaded rod penetrates through the penetrating hole to enter a threaded hole B of the sliding block and a threaded groove in the annular groove to be fixedly connected in a threaded mode, so that reinstallation can be conducted again in the later period without damaging the lamp pole, and the sliding block facilitates direction adjustment of the lamp arm installation mechanism by workers.

Description

Technical Field

[0001] The utility model relates to the technical field of installation devices, in particular to a street lamp arm installation device. Background Art

[0002] As urbanization becomes more and more important, street lamps are used more and more widely. Street lamps are lamps that provide lighting for roads. They generally refer to lamps within the range of road lighting in traffic lighting. Street lamps are widely used in various places that need lighting. The lamp head and lamp pole of the street lamp need to be connected and installed with a lamp arm.

[0003] After searching, the existing patent (publication number: CN210014295U) discloses an anti-glare pathway lamp installation device. The technical solution is: including a lamp arm and a fixing device, the lamp arm includes a supporting part and a connecting part, one end of the supporting part is connected to the lamp holder, and the other end is connected to the lamp pole through the connecting part, the connecting part is provided with a screw hole, and the two ends of the connecting part are fixed to the lamp pole through a fixing device, the fixing device is composed of two semi-rings, and the semi-rings surround the fixing device, the fixing device includes an embedded part and a fastening part, the embedded part is three notches, and the fastening part is one notch. The middle part of the lamp arm is fixed to the lamp pole by bolts, and the two ends of the connecting part are connected and fixed to the lamp pole by fixing devices, which can avoid the sliding that may be caused by the clamp connection and avoid the influence of the strength of the lamp pole by the jamming; the fixing devices are arranged at both ends of the connecting part to effectively prevent the lamp arm from tilting and sagging. The inventor found that the prior art has the following problems in the process of realizing the utility model:

[0004] Existing street lamps are generally composed of lamps, electrical appliances, light sources, lamp poles, lamp arms, flanges, and foundation embedded parts. The lamp poles are generally made of metal for the purpose of drilling and installation. Once the street lamp is used, if you want to install the lamp arm again, you can only drill holes on the lamp pole for installation. However, too many holes in the metal lamp pole may reduce the metal strength and rust a large area, resulting in a shortened service life. If welding is used, it will be very inconvenient to operate and take a long time. Generally, bolts are needed to fix it, and bolts need to be operated with a wrench. If the staff loses or forgets to bring it, they cannot work without the wrench tool, which is very troublesome.

[0005] Therefore, in order to solve the above problems, a street lamp arm mounting device is proposed. Utility Model Content

[0006] 1. Technical issues to be resolved

[0007] In view of the deficiencies in the prior art, the utility model provides a street lamp arm mounting device, which solves the problems arising from the above-mentioned background technology.

[0008] (II) Technical solution

[0009] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a street lamp arm mounting device, comprising a lamp pole, a base is fixed to the bottom of the lamp pole, a lamp arm mounting mechanism is fixed to the outer wall of the lamp pole, a lamp arm is installed inside the lamp arm mounting mechanism, and a street lamp mechanism is fixed to one end of the lamp arm away from the lamp arm mounting mechanism.

[0010] Furthermore, the lamp arm mounting mechanism includes two lamp arm bases, a right clamp block connection mechanism, a left clamp block, a lamp arm slot, a bolt hole, a groove, a support rod, a first rotating shaft, a first bevel gear, a first crank, a second rotating shaft, a second bevel gear, a third bevel gear, a screw A, and a fourth bevel gear. The outer side of the lamp arm base is installed with a right clamp block connection mechanism, the left surface of the right clamp block connection mechanism is provided with a lamp arm slot, the lamp arm is placed inside the lamp arm slot, the left surface of the right clamp block connection mechanism is located on the outer side of the lamp arm slot and is provided with four bolt holes, a left clamp block is provided on the left side of the right clamp block connection mechanism, a groove is provided inside the left clamp block, two support rods are fixed inside the groove, the interiors of the two support rods are respectively rotatably connected with the first rotating shaft, the two ends of the first rotating shaft pass through the support rod and are respectively fixed with the first bevel gears, and the outer wall of the first rotating shaft is fixed with The second bevel gear, the internal rotation connection of the left clamp block is connected to two second rotating shafts, the two ends of the two second rotating shafts pass through the left clamp block respectively, the right end of the second rotating shaft is fixed with a third bevel gear, the left end of the second rotating shaft is fixed with a first crank, the top third bevel gear is meshed with the top second bevel gear, the bottom third bevel gear is meshed with the bottom second bevel gear, the internal rotation connection of the left clamp block is connected to four screws A, the two ends of the screw A pass through the left clamp block, the screw A is threadedly connected to the bolt hole, and the end of the screw A located inside the left clamp block is fixed with a fourth bevel gear, the upper and lower front two fourth bevel gears are respectively meshed with the upper and lower front two first bevel gears, and the upper and lower rear two fourth bevel gears are respectively meshed with the upper and lower rear two first bevel gears.

[0011] Furthermore, the lamp arm base includes a circular ring, an annular groove, a slider, a threaded hole B, and a threaded groove. The outer wall of the circular ring is provided with an annular groove, and three sliders are slidably connected inside the annular groove. A threaded hole B is provided inside the slider, and both ends of the threaded hole B respectively pass through the slider. Three threaded grooves are provided on the inner wall of the annular groove.

[0012] Furthermore, the right clamping block connection mechanism includes a block, a groove B, a first rotating rod, a bevel gear A, a bevel gear B, a screw, a through hole, a second crank, and a support block. The block is provided with a groove B inside, and the block is rotatably connected to the first rotating rod inside. The two ends of the first rotating rod pass through the block and are respectively located inside the groove B and outside the block. The second crank is fixed to the bottom of the first rotating rod, and the top and outer side wall of the first rotating rod are fixed with bevel gear A. Two supporting blocks are fixed inside the groove B. The support block is internally rotatably connected to a screw rod, and the two ends of the screw rod respectively pass through the support block. A bevel gear B is fixed to the left end of the screw rod, and the bevel gear B is meshingly connected to the bevel gear A. Two through holes are provided on the right surface of the block, and both of the through holes are connected to the groove B. One end of the screw rod away from the bevel gear B passes through the through hole and the threaded hole B and is located inside the thread groove, and the outer side wall of the screw rod is threadedly connected to the inner side wall of the threaded hole B and the inner side wall of the thread groove, respectively.

[0013] Furthermore, the width of the bottom of the lamp arm is greater than the depth of the lamp arm groove.

[0014] Furthermore, a solar panel is installed on the top of the street lamp mechanism.

[0015] (III) Beneficial effects

[0016] The utility model provides a street lamp arm installation device, which has the following beneficial effects:

[0017] (1) The utility model is provided with a lamp arm, a lamp arm base, a right clamping block connection mechanism, a left clamping block, a lamp arm slot, a bolt hole, a support rod, a first rotating shaft, a first bevel gear, a first crank, a second rotating shaft, a second bevel gear, a third bevel gear, a screw A, and a fourth bevel gear. The user places the lamp arm in the lamp arm slot and shakes the first crank. The first crank drives the second rotating shaft and the third bevel gear to rotate. The third bevel gear drives the second bevel gear to rotate. The second bevel gear drives the first rotating shaft and the first bevel gear to rotate. The first bevel gear drives the fourth bevel gear and the screw A to rotate, so that the screw A rotates and enters the bolt hole. In this way, the left clamping block clamps the lamp arm and the lamp arm can be fixed in the lamp arm slot.

[0018] (2) The utility model sets a circular ring, an annular groove, a slider, a threaded hole B, a threaded groove, a block, a groove B, a first rotating rod, a bevel gear A, a bevel gear B, a screw, a through hole, a second crank, and a support block. The user lifts the block to the position of the circular ring and shakes the second crank. The second crank drives the first rotating rod and the two bevel gears A to rotate, the bevel gear A drives the bevel gear B to rotate, and the bevel gear B drives the screw to rotate, so that the screw passes through the through hole and enters the threaded hole B of the slider and the threaded groove in the annular groove to be threadedly connected and fixed. In this way, it can be installed again later without damaging the lamp pole. In addition, the slider also makes it convenient for the staff to adjust the direction of the lamp arm installation mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the utility model;

[0020] Figure 2 It is a schematic diagram of the internal structure of the right clamp block connection mechanism in the utility model;

[0021] Figure 3 For this utility model Figure 2 The structural diagram at A in the middle;

[0022] Figure 4 It is a top view internal structure diagram of the connection mechanism between the middle lamp arm base and the right clamp block of the utility model;

[0023] Figure 5 It is a top view schematic diagram of the internal structure of the left clamping block in the utility model;

[0024] Figure 6 It is a right side view of the internal structure of the left clamping block in the utility model;

[0025] Figure 7 It is a left-side structural schematic diagram of the right clamp block connection mechanism in the utility model;

[0026] Figure 8 It is a structural schematic diagram of the lamp arm in the utility model.

[0027] In the figure: 1, lamp pole; 2, base; 3, lamp arm mounting mechanism; 4, lamp arm; 5, street lamp mechanism; 301, lamp arm base; 302, right clamping block connection mechanism; 303, left clamping block; 304, lamp arm slot; 305, bolt hole; 306, groove; 307, support rod; 308, first rotating shaft; 309, first bevel gear; 310, first crank; 311, second rotating shaft; 312, second bevel gear; 313, third bevel gear gear; 314, screw A; 315, fourth bevel gear; 3010, ring; 3011, annular groove; 3012, slider; 3013, threaded hole B; 3014, threaded groove; 3021, block; 3022, groove B; 3023, first rotating rod; 3024, bevel gear A; 3025, bevel gear B; 3026, screw; 3027, through hole; 3028, second crank; 3029, support block. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] Embodiment 1

[0030] like Figure 1 , Figure 2 and Figure 8 As shown, the utility model provides a technical solution: a street lamp arm mounting device, including a lamp pole 1, a base 2 is fixed to the bottom of the lamp pole 1, a lamp arm mounting mechanism 3 is fixed to the outer wall of the lamp pole 1, a lamp arm 4 is installed inside the lamp arm mounting mechanism 3, and a street lamp mechanism 5 is fixed to one end of the lamp arm 4 away from the lamp arm mounting mechanism 3.

[0031] Wherein: first, the user places the lamp arm 4 into the lamp arm slot 304, shakes the first crank 310, the first crank 310 drives the second shaft 311 and the third bevel gear 313 to rotate, the third bevel gear 313 drives the second bevel gear 312 to rotate, the second bevel gear 312 drives the first shaft 308 and the first bevel gear 309 to rotate, the first bevel gear 309 drives the fourth bevel gear 315 and the screw A314 to rotate, so that the screw A314 rotates into the bolt hole 305, so that the left clamping block 303 clamps the lamp arm 4, and the lamp arm 4 can be fixed in the lamp arm slot 304, and the user lifts the block 3021 to the round The ring 3010 is positioned and the second crank handle 3028 is shaken. The second crank handle 3028 drives the first rotating rod 3023 and the two bevel gears A3024 to rotate. The bevel gear A3024 drives the bevel gear B3025 to rotate. The bevel gear B3025 drives the screw 3026 to rotate, so that the screw 3026 passes through the through hole 3027 and enters into the threaded hole B3013 of the slider 3012 and the threaded groove 3014 in the annular groove 3011 to be threadedly connected and fixed. In this way, it can be installed again later without damaging the lamp pole 1. In addition, the slider 3012 also makes it convenient for the staff to adjust the direction of the lamp arm mounting mechanism 3.

[0032] like Figure 1 , Figure 2 , Figure 4 , Figure 5 , Figure 6 and Figure 7As shown in the figure, as a preferred embodiment; the lamp arm mounting mechanism 3 includes two lamp arm bases 301, a right clamping block connection mechanism 302, a left clamping block 303, a lamp arm slot 304, a bolt hole 305, a groove 306, a support rod 307, a first rotating shaft 308, a first bevel gear 309, a first crank 310, a second rotating shaft 311, a second bevel gear 312, a third bevel gear 313, a screw A314, and a fourth bevel gear 315. The right clamping block connection mechanism 302 is installed on the outer side of the lamp arm base 301, and a lamp arm slot 304 is opened on the left surface of the right clamping block connection mechanism 302. The lamp arm slot 304 is placed inside the lamp arm slot 304. The left surface of the right clamping block connection mechanism 302 is located at Four bolt holes 305 are provided on the outer side of the lamp arm slot 304, a left clamping block 303 is provided on the left side of the right clamping block connection mechanism 302, a groove 306 is provided inside the left clamping block 303, two support rods 307 are fixed inside the groove 306, the insides of the two support rods 307 are respectively rotatably connected with a first rotating shaft 308, the two ends of the first rotating shaft 308 pass through the support rods 307 and are respectively fixed with a first bevel gear 309, a second bevel gear 312 is fixed to the outer side wall of the first rotating shaft 308, the inside of the left clamping block 303 is rotatably connected with two second rotating shafts 311, the two ends of the two second rotating shafts 311 pass through the left clamping block 303, and the right end of the second rotating shaft 311 is fixed with a third bevel gear 312. The left end of the second rotating shaft 311 is fixed with the first crank 310, the top third bevel gear 313 is meshed with the top second bevel gear 312, the bottom third bevel gear 313 is meshed with the bottom second bevel gear 312, the inside of the left clamping block 303 is rotatably connected with four screws A314, both ends of the screw A314 pass through the left clamping block 303, the screw A314 is threadedly connected with the bolt hole 305, and the end of the screw A314 located inside the left clamping block 303 is fixed with the fourth bevel gear 315, the upper and lower fourth bevel gears 315 in the front are meshed with the upper and lower first bevel gears 309 in the front, and the upper and lower second fourth bevel gears 315 in the rear are meshed with the upper and lower first bevel gears 309 in the front, respectively. The four bevel gears 315 are respectively meshed with the two upper and lower first bevel gears 309 at the rear. Further, the user places the lamp arm 4 into the lamp arm slot 304 and shakes the first crank 310. The first crank 310 drives the second shaft 311 and the third bevel gear 313 to rotate. The third bevel gear 313 drives the second bevel gear 312 to rotate. The second bevel gear 312 drives the first shaft 308 and the first bevel gear 309 to rotate. The first bevel gear 309 drives the fourth bevel gear 315 and the screw A314 to rotate, so that the screw A314 rotates into the bolt hole 305. In this way, the left clamp 303 clamps the lamp arm 4, and the lamp arm 4 can be fixed in the lamp arm slot 304.

[0033] like Figure 1 and Figure 2As shown, as a preferred embodiment; the lamp arm base 301 includes a circular ring 3010, an annular groove 3011, a slider 3012, a threaded hole B3013, and a threaded groove 3014. The outer wall of the circular ring 3010 is provided with an annular groove 3011, and three sliders 3012 are slidably connected inside the annular groove 3011. The slider 3012 is provided with a threaded hole B3013, and both ends of the threaded hole B3013 respectively pass through the slider 3012. The inner wall of the annular groove 3011 is provided with three threaded grooves 3014. Furthermore, this makes it convenient for the staff to install the lamp arm mounting mechanism 3 to the slider 3012 and move it along the annular groove 3011 to align it with the threaded groove 3014 for connection and fixation.

[0034] like Figure 1 , Figure 2 and Figure 3As shown, as a preferred embodiment; the right clamping block connection mechanism 302 includes a block 3021, a groove B3022, a first rotating rod 3023, a bevel gear A3024, a bevel gear B3025, a screw 3026, a through hole 3027, a second crank 3028, and a support block 3029. The block 3021 is provided with a groove B3022, and the inside of the block 3021 is rotatably connected to the first rotating rod 3023. The two ends of the first rotating rod 3023 pass through the block 3021 and are respectively located inside the groove B3022 and outside the block 3021. A second crank 3028 is fixed to the bottom of the rod 3023, a bevel gear A3024 is fixed to the top and outer wall of the first rotating rod 3023, two support blocks 3029 are fixed inside the groove B3022, the support block 3029 is internally rotatably connected to the screw 3026, both ends of the screw 3026 pass through the support block 3029 respectively, a bevel gear B3025 is fixed to the left end of the screw 3026, the bevel gear B3025 is meshed with the bevel gear A3024, and two through holes 3027 are provided on the right surface of the block 3021, and the two through holes 3027 are connected to the The groove B3022 is connected, and the end of the screw rod 3026 away from the bevel gear B3025 passes through the through hole 3027 and the threaded hole B3013 and is located inside the thread groove 3014. The outer wall of the screw rod 3026 is threadedly connected with the inner wall of the threaded hole B3013 and the inner wall of the thread groove 3014 respectively. Further, the user lifts the block 3021 to the position of the ring 3010 and shakes the second crank 3028. The second crank 3028 drives the first rotating rod 3023 and the two bevel gears A3024 to rotate, and the bevel gear A3024 drives the bevel gear B 3025 rotates, and the bevel gear B3025 drives the screw 3026 to rotate, so that the screw 3026 passes through the through hole 3027 and enters into the threaded hole B3013 of the slider 3012 and the threaded groove 3014 in the annular groove 3011 to be threadedly connected and fixed. In this way, it can be installed again later without damaging the lamp pole 1. The slider 3012 also makes it convenient for the staff to adjust the direction of the lamp arm mounting mechanism 3 to align it with the threaded groove 3014 for connection and fixation, which is convenient for later installation, reduces the work of the staff, and reduces the risk of the lamp arm mounting mechanism 3 falling during installation.

[0035] like Figure 1 , Figure 4 , Figure 7 and Figure 8 As shown, as a preferred embodiment; the width of the bottom of the lamp arm 4 is greater than the depth of the lamp arm groove 304, further, the lamp arm 4 can be clamped more firmly to prevent the lamp arm 4 from shaking and moving later.

[0036] like Figure 1 , Figure 2 and Figure 8As shown, as a preferred embodiment; a solar panel is installed on the top of the street lamp mechanism 5, which further provides a better backup power supply and saves energy and reduces emissions.

[0037] In summary, the working process of the utility model is as follows: first, the user places the lamp arm 4 into the lamp arm slot 304, shakes the first crank 310, the first crank 310 drives the second shaft 311 and the third bevel gear 313 to rotate, the third bevel gear 313 drives the second bevel gear 312 to rotate, the second bevel gear 312 drives the first shaft 308 and the first bevel gear 309 to rotate, the first bevel gear 309 drives the fourth bevel gear 315 and the screw A314 to rotate, so that the screw A314 rotates into the bolt hole 305, so that the left clamping block 303 clamps the lamp arm 4, and the lamp arm 4 can be fixed in the lamp arm slot 304, and the user puts the block 303 into the lamp arm slot 304. 021 is lifted to the position of the ring 3010, and the second crank 3028 is shaken. The second crank 3028 drives the first rotating rod 3023 and the two bevel gears A3024 to rotate, and the bevel gear A3024 drives the bevel gear B3025 to rotate. The bevel gear B3025 drives the screw 3026 to rotate, so that the screw 3026 passes through the through hole 3027 and enters the threaded hole B3013 of the slider 3012 and the threaded groove 3014 in the annular groove 3011 for threaded connection and fixation. In this way, it can be installed again later without damaging the lamp pole 1, and the slider 3012 also makes it convenient for the staff to adjust the direction of the lamp arm mounting mechanism 3.

[0038] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0039] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A street lamp arm mounting device, comprising a lamp pole (1), characterized in that: A base (2) is fixed at the bottom of the lamp pole (1), a lamp arm mounting mechanism (3) is fixed to the outer wall of the lamp pole (1), a lamp arm (4) is mounted inside the lamp arm mounting mechanism (3), and the lamp arm mounting mechanism (3) comprises two lamp arm bases (301), a right clamping block connection mechanism (302), a left clamping block (303), a lamp arm slot (304), a bolt hole (305), a groove (306), a support rod (307), a first rotating shaft (308), a first bevel gear (309), a first crank (310), a second rotating shaft (311), a second bevel gear (312), a third bevel gear (313), a screw A (314), and a fourth bevel gear (315). A right clamping block connection mechanism (302) is installed on the outer side of the seat (301), a lamp arm slot (304) is provided on the left surface of the right clamping block connection mechanism (302), a lamp arm (4) is placed inside the lamp arm slot (304), four bolt holes (305) are provided on the left surface of the right clamping block connection mechanism (302) located on the outer side of the lamp arm slot (304), a left clamping block (303) is provided on the left side of the right clamping block connection mechanism (302), a groove (306) is provided inside the left clamping block (303), two support rods (307) are fixed inside the groove (306), the insides of the two support rods (307) are respectively rotatably connected with a first rotating shaft (308), and the first rotating shaft The two ends of the left clamp (303) pass through the support rod (307) and are respectively fixed with a first bevel gear (309); the outer wall of the first rotating shaft (308) is fixed with a second bevel gear (312); the inner rotation of the left clamp (303) is connected with two second rotating shafts (311); the two ends of the two second rotating shafts (311) respectively pass through the left clamp (303); the right end of the second rotating shaft (311) is fixed with a third bevel gear (313); the left end of the second rotating shaft (311) is fixed with a first crank (310); the uppermost third bevel gear (313) is meshed with the uppermost second bevel gear (312); the lowermost third bevel gear (313) is meshed with the lowermost third bevel gear (312); The second bevel gear (312) at the bottom is meshedly connected, and four screws A (314) are rotatably connected inside the left clamping block (303). Both ends of the screws A (314) pass through the left clamping block (303), and the screws A (314) are threadedly connected to the bolt holes (305). A fourth bevel gear (315) is fixed to one end of the screw A (314) located inside the left clamping block (303), and the two fourth bevel gears (315) at the front upper and lower sides are respectively meshedly connected to the two first bevel gears (309) at the front upper and lower sides, and the two fourth bevel gears (315) at the rear upper and lower sides are respectively meshedly connected to the two first bevel gears (309) at the rear upper and lower sides.

2. A street lamp arm mounting device according to claim 1, characterized in that: The lamp arm base (301) comprises a circular ring (3010), an annular groove (3011), a slider (3012), a threaded hole B (3013), and a threaded groove (3014); the outer wall of the circular ring (3010) is provided with an annular groove (3011); three sliders (3012) are slidably connected inside the annular groove (3011); a threaded hole B (3013) is provided inside the slider (3012); both ends of the threaded hole B (3013) respectively pass through the slider (3012); and three threaded grooves (3014) are provided on the inner wall of the annular groove (3011).

3. A street lamp arm mounting device according to claim 2, characterized in that: The right clamp block connection mechanism (302) comprises a block body (3021), a groove B (3022), a first rotating rod (3023), a bevel gear A (3024), a bevel gear B (3025), a screw rod (3026), a through hole (3027), a second crank handle (3028), and a support block (3029). The block body (3021) is provided with a groove B (3022) inside. The block body (3021) is rotatably connected with the first rotating rod (3023) inside. Two ends of the first rotating rod (3023) pass through the block body (3021) and are respectively located inside the groove B (3022) and outside the block body (3021). The second crank handle (3028) is fixed to the bottom of the first rotating rod (3023). The top and outer wall of the first rotating rod (3023) are fixed with the bevel gear A (3024). Two A support block (3029) is provided, wherein the support block (3029) is internally rotatably connected to a screw rod (3026), and both ends of the screw rod (3026) respectively pass through the support block (3029). A bevel gear B (3025) is fixed to the left end of the screw rod (3026), and the bevel gear B (3025) is meshingly connected to the bevel gear A (3024). The right surface of the block (3021) is provided with two through holes (3027). ), the two through holes (3027) are connected to the groove B (3022), the end of the screw rod (3026) away from the bevel gear B (3025) passes through the through hole (3027) and the threaded hole B (3013) and is located inside the thread groove (3014), and the outer side wall of the screw rod (3026) is threadedly connected to the inner side wall of the threaded hole B (3013) and the inner side wall of the thread groove (3014) respectively.

4. A street lamp arm mounting device according to claim 3, characterized in that: The width of the bottom of the lamp arm (4) is greater than the depth of the lamp arm groove (304).

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