Synchronous pushing mechanism

Abstract

The utility model belongs to the field of synchronous transmission mechanisms, and particularly relates to a synchronous pushing mechanism. The utility model provides a synchronous pushing mechanism which comprises a middle cross rod. The conveyor belts sleeve the two ends of the middle cross rod and can rotate; the upper cross rod is arranged above the middle cross rod in parallel and is connected with the conveying belt; the lower cross rod is arranged below the middle cross rod in parallel and is connected with the conveying belt. According to the synchronous pushing mechanism, when the upper cross rod or the lower cross rod is pulled, the middle cross rod can be synchronously driven to move, and the middle cross rod, the upper cross rod and the lower cross rod synchronously rotate and retract.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of synchronous transmission mechanism, specifically relates to a synchronous pushing mechanism. BACKGROUND

[0002] In the traditional telescopic structure, including several sets or superimposed short rods, when one short rod is pulled or shortened, only one short rod can be pulled at a time, and when the pulled short rod reaches the end, the following short rod is driven to move, the efficiency is low, how to realize the synchronous stretching of several short rods, at present, there is no better transmission structure to solve this problem. CONTENT OF THE UTILITY MODEL

[0003] The utility model provides a synchronous pushing mechanism can effectively solve the problem in the prior art.

[0004] The utility model provides a synchronous pushing mechanism, including

[0005] Middle cross rod;

[0006] The transmission belt is rotatable and is sleeved on the two ends of the middle cross rod;

[0007] The upper cross rod is arranged in parallel above the middle cross rod and is connected with the transmission belt; And

[0008] The lower cross rod is arranged in parallel below the middle cross rod and is connected with the transmission belt.

[0009] As a further optimization of the utility model, the two ends of the middle cross rod are provided with synchronous pulleys;The transmission belt adopts the synchronous belt that is sleeved on the two synchronous pulleys.

[0010] As a further optimization of the utility model, the rear end of the upper cross rod is connected with the front end of the transmission belt, and the front end of the lower cross rod is connected with the rear end of the transmission belt;The upper cross rod is pulled forward, and the rear end of the upper cross rod moves to the front end of the transmission belt, and the front end of the lower cross rod moves to the rear end of the transmission belt.

[0011] As a further optimization of the utility model, the middle cross rod is provided with a sliding groove and a slide along the length direction;The rear end of the upper cross rod is provided with a first pulley that can slide in the sliding groove but not separate from the sliding groove, and the upper cross rod can rotate around the axis of the first pulley;The front end of the lower cross rod is provided with a second pulley that can slide on the slide, and the middle cross rod can rotate around the axis of the second pulley.

[0012] As a further optimization of the utility model, the middle part of the middle cross rod is provided with a long hole along the length direction, both sides of the long hole are provided with the sliding groove with the section of lateral recumbent U shape, and the two sliding groove openings are opposite;The rear end of the upper cross rod is provided with the first pulley corresponding to the two sliding grooves on both sides.

[0013] As further optimization of the utility model, the bottom surface of the middle cross bar is provided with two slides; the second pulley is arranged on the two sides of the two slides at the front end of the lower cross bar.

[0014] As further optimization of the utility model, the utility model further comprises

[0015] The first belt clamp is hinged at the end head and the rear end of the upper cross bar, and the upper cross bar is connected with the conveying belt through the first belt clamp; and

[0016] The second belt clamp is hinged at the end head and the rear end of the lower cross bar, and the lower cross bar is connected with the conveying belt through the second belt clamp.

[0017] As further optimization of the utility model, the first belt clamp and the second belt clamp both comprise

[0018] The bottom plate is used for hinging; and

[0019] The pressing plate is used for pressing and fixing the conveying belt on the bottom plate.

[0020] As further optimization of the utility model, the conveying belt is a synchronous belt; the surface of the pressing plate facing the bottom plate or the surface of the bottom plate facing the pressing plate is a tooth surface corresponding to the synchronous belt.

[0021] As further optimization of the utility model, the middle cross bar, the conveying belt, the upper cross bar and the lower cross bar are both provided with two groups and are symmetrically arranged; the utility model further comprises a connecting rod connecting the two middle cross bars and the two front cross bars.

[0022] The synchronous pushing mechanism provided by the utility model can synchronously drive the middle cross bar to move when the upper cross bar or the lower cross bar is pulled, and the middle cross bar, the upper cross bar and the lower cross bar are synchronously rotated and pulled out. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 is an initial state structure schematic view;

[0024] Figure 2 is Figure 1 a schematic view of the structure being pulled forward;

[0025] Figure 3 is a final state structure schematic view;

[0026] Figure 4 is Figure 3 a structure schematic view from another perspective;

[0027] Figure 5 is Figure 3 a local enlarged structure schematic view;

[0028] Figure 6 is Figure 4 a local enlarged structure schematic view;

[0029] Wherein, the upper crossbar 1, the first pulley 1a, the middle crossbar 2, the sliding groove 2a, the sliding channel 2b, the pulley 2c, the lower crossbar 3, the second pulley 3a, the bottom plate 4a, the pressing plate 4b, the connecting rod 5. DETAILED DESCRIPTION

[0030] Embodiment 1

[0031] As shown in the drawings, the embodiment includes an upper crossbar 1, a middle crossbar 2, a lower crossbar 3 and a conveyor belt. Figure 1 , 2 The conveyor belt can be rotatably sleeved at both ends of the middle crossbar 2. In order to make the conveyor belt rotate more smoothly, the embodiment is provided with pulleys 2c at both ends of the middle crossbar 2, and both ends of the conveyor belt are sleeved on the two pulleys 2c respectively.

[0032] The upper crossbar 1 is connected with the upper layer of the conveyor belt, and the lower crossbar 3 is connected with the lower layer of the conveyor belt.

[0033] With this structure, if the middle crossbar 2 is fixed, pulling the upper crossbar 1 in the length direction can drive the lower crossbar 3 to move in the opposite direction, and pulling the lower crossbar 3 can also drive the upper crossbar 1 to move in the opposite direction. If the lower crossbar 3 is fixed, pulling the upper crossbar 1 can also pull the middle crossbar 2 synchronously, realizing the linkage function and improving the pulling efficiency.

[0034] In order to realize the maximum distance after being pulled, in the initial state, the rear end of the upper crossbar 1 of the embodiment is connected with the rear end of the conveyor belt, and the front end of the lower crossbar 3 is connected with the front end of the conveyor belt. In other embodiments, the middle part of the upper crossbar 1 and the lower crossbar 3 can also be fixed with the conveyor belt in the initial state. In other embodiments, the chain is used instead of the conveyor belt, which should be understood as equivalent replacement.

[0035] Embodiment 2

[0036] As shown in the drawings, the embodiment is an improvement based on embodiment 1, further providing a sliding groove 2a and a sliding channel 2b along the length direction of the middle crossbar 2.

[0037] Specifically, a long hole is formed in the middle part of the middle crossbar 2 along the length direction, and a sliding groove 2a is arranged on the two opposite sides of the long hole. The cross section of the sliding groove 2a is in a lateral U shape and the openings are opposite. In other embodiments, the sliding groove 2a can also be arranged on the side of the middle crossbar 2 without the long hole. The long hole of the embodiment can narrow the width of the middle crossbar 2, and also can better hide the sliding groove 2a.

[0038] In other embodiments, the sliding channel 2b can also be arranged on the side of the middle crossbar 2 without the long hole. Figures 3-6 In other embodiments, the sliding channel 2b can also be arranged on the side of the middle crossbar 2 without the long hole.

[0039] In other embodiments, the sliding channel 2b can also be arranged on the side of the middle crossbar 2 without the long hole.

[0040] In this embodiment, the rear end of the upper crossbar 1 is provided with a first pulley 1a that can slide in the slide groove 2a but does not detach from the slide groove 2a. Specifically, a protrusion is provided at the rear end of the upper crossbar 1, and the first pulley 1a is provided on both sides of the protrusion corresponding to the two slide grooves 2a, so that the first pulley 1a can only slide in the first slide groove 2a.

[0041] Since there are no other constraints, the upper crossbar 1 can not only slide relative to the middle crossbar 2 along its length, but also rotate around the axis of the first pulley 1a.

[0042] In addition, this embodiment also provides a second pulley 3a at the front end of the lower crossbar 3, which can slide on the slide rail 2b.

[0043] In this embodiment, two slide rails 2b are provided on the bottom surface of the middle crossbar 2, and therefore two second pulleys 3a are also provided corresponding to the two slide rails 2b. Similarly, the middle crossbar 2 can also rotate relative to the lower crossbar 3 around the axis of the second pulleys 3a.

[0044] When using, such as Figure 1 , 2 As shown in Figure 3, the lower crossbar 3 is fixed, and the upper crossbar 1 is pulled forward. Under the rotation of the conveyor belt, the middle crossbar 2 is also moved forward relative to the lower crossbar 3. When it moves to a certain distance, the center of gravity of the middle crossbar 2 becomes unbalanced, and the front half will tilt downward with the second pulley 3a as the fulcrum. At the same time, the upper crossbar 1 can be controlled to flip relative to the middle crossbar 2 with the first pulley 1a as the fulcrum, so that the upper crossbar 1 always maintains a horizontal state.

[0045] The mechanism in this embodiment can be applied to the field of vehicle roof racks. Specifically, the lower crossbar 3 is fixed to the roof of the vehicle, and the middle crossbar 2, conveyor belt, upper crossbar 1, and lower crossbar 3 are all provided in two sets and symmetrically arranged. In addition, three connecting rods 5 are provided, which are used to connect the rear ends of the two middle crossbars 2, the front ends of the two middle crossbars 2, and the front ends of the two front crossbars, respectively. In use, simply pulling the upper crossbar 1 will allow the two upper crossbars 1 to descend horizontally from the roof of the vehicle.

[0046] Furthermore, in order to solve the problem of stability during the process of the upper crossbar 1 descending in parallel, the conveyor belt in this embodiment uses a synchronous belt, and the pulley 2c uses a synchronous pulley.

[0047] Furthermore, it also includes a first belt clamp and a second belt clamp. The first belt clamp and the second belt clamp have the same structure, the difference being that the end of the first belt clamp is hinged to the rear end of the upper crossbar 1, and the upper crossbar 1 is connected to the conveyor belt through the first belt clamp; the end of the second belt clamp is hinged to the rear end of the lower crossbar 3, and the lower crossbar 3 is connected to the conveyor belt through the second belt clamp. This structure ensures that the rotation of the middle crossbar 2 and the upper crossbar 3 will not affect the conveyor belt.

[0048] Specifically, the first and second belt clamps each include a base plate 4a and a pressing plate 4b. The end of the base plate 4a is used for hinging, and the pressing plate 4b presses the synchronous belt on the base plate 4a, and bolts are used to fix the pressing plate 4b, the synchronous belt and the base plate 4a. Preferably, the surface of the pressing plate 4b facing the base plate 4a is provided with a tooth surface corresponding to the tooth shape of the synchronous belt, so that when the synchronous belt is pulled, the force is applied through the tooth surface, and the synchronous belt is not easy to be damaged. In other embodiments, according to different installation modes, the surface of the base plate 4a facing the pressing plate 4b can also be provided with a tooth surface.

[0049] It should be noted that the up, down, top, bottom, front, back and other orientation expressions described in the present application are based on the drawings of the specification, and are only used to clearly and simply express the technical solutions, and do not limit the protection scope.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and are not limited to the scope of protection of the present application. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced by equivalents without departing from the essence and scope of the technical solutions of the present application.

Claims

1. A synchronous push mechanism, characterized by, The utility model relates to a kind of transmission device, including Middle crossbar; Conveying belt rotatable being sleeved in both ends of middle crossbar; Upper crossbar is arranged in parallel above middle crossbar and is connected with conveying belt;And Lower crossbar is arranged in parallel below middle crossbar and is connected with conveying belt.

2. A synchronous push mechanism according to claim 1, wherein, Synchronous pulley is equipped in both ends of middle crossbar;Conveying belt adopts synchronous belt being sleeved on two synchronous pulleys.

3. A synchronous push mechanism according to claim 1, wherein, The rear end of upper crossbar is connected with the rear end of conveying belt, and the front end of lower crossbar is connected with the front end of conveying belt;Forward pull upper crossbar, the rear end of upper crossbar moves to the front end of conveying belt, and the front end of lower crossbar moves to the rear end of conveying belt.

4. A synchronous push mechanism according to claim 3, wherein, Middle crossbar is equipped with chute and slide along length direction;The rear end of upper crossbar is equipped with first pulley that can slide in chute but not separate from chute, and upper crossbar can rotate around the axis line of first pulley;The front end of lower crossbar is equipped with second pulley that can slide on slide, and middle crossbar can rotate around the axis line of second pulley.

5. A synchronous push mechanism according to claim 4, wherein, The middle part of middle crossbar is equipped with long strip-shaped through hole along length direction, and both sides of through hole are equipped with chute with section lying U shape, and the opening of two chutes is opposite;The rear end of upper crossbar is equipped with first pulley corresponding two chutes on both sides.

6. A synchronous push mechanism according to claim 4, wherein, The bottom surface of middle crossbar is equipped with two slides;The front end of lower crossbar is equipped with second pulley corresponding two chutes on both sides.

7. A synchronous push mechanism according to claim 4, wherein, Still including First belt clamp with rear end hinged to the rear end of upper crossbar, and upper crossbar is connected with conveying belt through first belt clamp;And Second belt clamp with rear end hinged to the rear end of lower crossbar, and lower crossbar is connected with conveying belt through second belt clamp.

8. A synchronous push mechanism according to claim 7, wherein, First belt clamp and second belt clamp all include Bottom plate for hinging to the rear end;And Pressing plate is used to press and fix conveying belt on bottom plate.

9. A synchronous push mechanism according to claim 8, wherein, Conveying belt adopts synchronous belt;The surface of pressing plate towards bottom plate or the surface of bottom plate towards pressing plate is the tooth surface corresponding to synchronous belt.

10. The synchronous push mechanism of claim 1, wherein, Middle crossbar, conveying belt, upper crossbar and lower crossbar are equipped with two groups and symmetrically arranged;Still including connecting rod connecting two middle crossbars and two front crossbars.

Images