CN205527414U - Tower crane adheres to bracing piece straightness accuracy holding device - Google Patents

Abstract

The utility model belongs to the field of attached supporting rods of tower cranes, in particular to a straightness maintaining device for supporting rods. The purpose is to provide a tower crane attachment support rod straightness maintaining device capable of preventing the attachment support rod from bending, including a left support rod and a right support rod connected by a two-way screw rod, the left support rod and the right support rod Nuts are fixed on the opposite ends, and the two ends of the two-way screw rod are respectively screwed into the nuts on the left support rod and the right support rod, and ear plates are fixedly worn on the left support rod and the right support rod. The two ear plates are connected by 4 double-ended screws, and the interval between adjacent double-ended screws is 90 degrees. The utility model improves the rigidity of the two-way screw through the double-ended screw, and the layout of the four double-ended screws makes it impossible for the left support rod and the right support rod to bend in any direction of the circumference.

Description

Tower crane attachment support bar straightness maintaining device

technical field

The utility model belongs to the field of attached support rods of tower cranes, in particular to a straightness maintaining device for a support rod.

Background technique

When the height of the tower crane is high, the tower body is prone to shaking and tilting. In order to ensure the stability of the tower body and the verticality relative to the ground, it is necessary to use the attached support rod to anchor the tower and the building. As shown in Figure 1: the attached support rod is mainly composed of a left support rod and a right support rod. The two support rods are connected by a two-way screw and a nut. The two-way screw can adjust the distance between the two length units. Thereby adjust the length of the support rod. Due to the gap between the two-way screw and the nut, the stiffness of the two-way screw is low, as shown in Figure 2: eventually the support rod is bent under the action of gravity.

Utility model content

Aiming at the shortcomings of the above-mentioned prior art, the utility model provides a straightness maintaining device for the attachment support rod of a tower crane, which can improve the rigidity of the two-way screw rod and prevent the attachment support rod from bending.

The technical solution of the utility model is: a straightness maintaining device attached to a support rod of a tower crane, comprising a left support rod and a right support rod connected by a two-way screw rod, and the opposite ends of the left support rod and the right support rod are arranged Nuts are fixed, and the two ends of the two-way screw rod are screwed into the nuts on the left support rod and the right support rod respectively, and ear plates are fixedly worn on the left support rod and the right support rod. The ear plates are connected by 4 double-ended screws, and the interval between adjacent double-ended screws is 90 degrees.

The utility model has the following beneficial effects: the rigidity of the two-way screw is improved through the double-ended screw, and the layout of the four double-ended screws prevents the left support rod and the right support rod from being bent in any direction of the circumference.

Description of drawings

Fig. 1 is the structural representation of prior art;

Fig. 2 is a state diagram of the bending state of the support rod in the prior art;

Fig. 3 is the structural representation of the utility model;

Fig. 4 is a cross-sectional view of A-A in Fig. 3 .

detailed description

As shown in Figures 3 to 4, a straightness maintaining device attached to a support rod of a tower crane includes a left support rod 2 and a right support rod 3 connected by a two-way screw rod 1, and the left support rod 2 and the right support rod The opposite end of bar 3 is all fixedly provided with nut 4, and the two ends of described two-way screw mandrel 1 are respectively screwed in the nut 4 on the left support bar 2 and the right support bar 3, and two-way screw mandrel 1 can rotate relative to nut 4 so that Adjust the distance between the left support rod 2 and the right support rod 3, thereby adjusting the overall length of the attached support rod. Both the left support rod 2 and the right support rod 3 are fixedly sheathed with ear plates 5, the ear plates 5 are arranged close to the end faces of the nuts 4, and four double-ended screws 6 are passed between the two ear plates 5. connection, the interval between adjacent double-ended screw rods 6 is 90 degrees, because the double-ended screw rod 6 has enhanced the rigidity of the two-way screw rod 1, thereby improving the connection strength between the left support rod 2 and the right support rod 3, so that the left support rod 2 and the right support rod 3 can be maintained on the same straight line, and bending is not easy to occur; and the interval between adjacent double-ended screws 6 is set at 90 degrees, which can ensure that the left support 2 and the right support rod 3 cannot be bent in any direction of the circumference bent.

Preferably, the ear plate 5 includes a ring sleeve, and four lugs are evenly distributed along the circumferential direction of the ring sleeve, and the lugs are provided with through holes for installing double-ended screws. This structure is beneficial to reduce the overall weight of the attached support rod and save materials. Certainly ear plate 5 also can be other shape structure, as disk shape, square etc., all should fall within the scope of protection of the present utility model.

After adjusting the length of the attached support rod through the two-way screw rod 1, the double-ended screw rod 6 is installed on the ear plate 5. In order to meet the adjustment range of the two-way screw rod 1, a preferred embodiment can be adopted: the double-ended screw rod 6 The distance between the outer ends of the upper two threads is not less than the maximum adjustment value of the double-ended screw rod, and the distance between the inner ends of the two threads on the double-ended screw rod 6 is not greater than the minimum adjustment value of the double-ended screw rod.

Claims (4)

1. a derrick crane support bar linearity holding means, including by Bidirectional-screw even The left support bar connect and right support bar, described left support bar is the most fixed with on the opposite end of right support bar Nut, the two ends of described Bidirectional-screw is had to screw in left support bar and the nut on right support bar respectively In, it is characterised in that: described left support bar is all fixing with on right support bar is coated with otic placode, described Connected by 4 double threaded screws between two pieces of otic placodes, between adjacent double threaded screw, be spaced 90 degree.

Derrick crane support bar linearity holding means the most according to claim 1, its It is characterised by: described otic placode is against the end face of nut.

Derrick crane support bar linearity holding means the most according to claim 1 and 2, It is characterized in that: described otic placode includes annulus set, be evenly equipped with four along described annulus set circumferencial direction Journal stirrup, described journal stirrup is provided with the through hole for installing double threaded screw.

Derrick crane support bar linearity holding means the most according to claim 1, its It is characterised by: on described double threaded screw, the outer end distance of two screw threads is not less than the maximum tune of double end screw mandrel Joint value, the minimal adjustment value of the inner distance no more than double end screw mandrel of two screw threads on double threaded screw.