Engineering cost calculation device

Abstract

The utility model discloses a project cost calculation device, and relates to the technical field of project cost. The projector comprises a supporting frame, a transverse plate is movably mounted on the inner side of the supporting frame, a telescopic rod A is fixedly connected to the bottom of the transverse plate, a telescopic rod B is fixedly connected to the end, away from the transverse plate, of the telescopic rod A, a projector mounting plate is fixedly connected to the top of the telescopic rod B, and a sliding rail is fixedly connected to the rear end of the transverse plate. According to the utility model, through the arrangement of the locking mechanism, the locking block is clamped in the clamping groove at the rear end of the movable tooth at the beginning, so that the sliding block cannot move in the sliding rail under the limitation of the movable tooth and the fixed rack, and the projection plate is fixed and cannot move; and when the projection plate needs to be moved, the locking block is pulled out through the pull ring, and then the sliding block can move in the sliding rail to adjust the distance of the projection plate.

Description

Technical Field

[0001] The utility model belongs to the technical field of engineering cost, in particular to an engineering cost calculation device. Background Art

[0002] Project cost estimation is the process of forecasting, planning, controlling, calculating, analyzing and evaluating project cost by comprehensively applying knowledge and skills in management, economics and engineering technology. It is usually demonstrated with a projector.

[0003] The utility model with publication number CN213843748U discloses a demonstration device for engineering cost calculation, including two brackets, the left and right ends of the two brackets are fixedly connected by connecting plates, two slide rails are arranged between the upper ends of the two brackets, the right ends of the two slide rails are fixedly connected by a cross plate, the right ends of the two slide rails are rotatably connected to the sides of the two brackets that are close to each other, and sliders are arranged inside the two slide rails. In the above application document, the distance from the display board to the projector mounting plate is adjusted by sliding the two sliders inside the two slide rails. During the demonstration, the sliders are easy to slide in the slide rails, causing the display board to move, which may affect the demonstration process. Utility Model Content

[0004] The utility model aims to provide a project cost calculation device, which solves the existing problems by providing a locking mechanism.

[0005] In order to solve the above technical problems, the utility model is realized by the following technical solutions:

[0006] The utility model discloses an engineering cost calculation device, comprising a support frame, a horizontal plate is movably installed on the inner side of the support frame, a telescopic rod A is fixedly connected to the bottom of the horizontal plate, a telescopic rod B is fixedly connected to the end of the telescopic rod A away from the horizontal plate, a projector mounting plate is fixedly connected to the top of the telescopic rod B, a slide rail is fixedly connected to the rear end of the horizontal plate, a slider is slidably connected to the inside of the slide rail, a connecting plate is fixedly connected to the end of the slider away from the slide rail, a telescopic rod C is fixedly connected to the top of the connecting plate, and the top of the telescopic rod C is rotatably connected to the top of the telescopic rod C. A projection plate is provided, a locking mechanism is arranged inside the slide rail, a deceleration mechanism is arranged at the rear end of the slider, the locking mechanism comprises a fixed rack, a groove and a slide slot, the fixed rack is fixedly connected to the inner wall of the slide rail, the groove is arranged on the side of the slider, a telescopic spring is fixedly connected to the inner wall of the groove, movable teeth are slidably connected inside the groove through the telescopic spring, a card slot is arranged at the rear end of the movable teeth, the slide slot is arranged at the rear end of the slider, a locking block is slidably connected inside the slide slot, and a pull ring is fixedly connected to the rear end of the locking block.

[0007] Furthermore, the surface of the movable tooth is smooth, and in the initial state, the end of the movable tooth away from the groove is close to the fixed rack. The surface of the movable tooth is smooth and the friction is small. When the slider moves, it will drive the movable tooth to contact the teeth on the fixed rack.

[0008] Furthermore, the depth of the groove is greater than the length of the movable tooth, the elastic force of the telescopic spring is greater than the friction between the movable tooth and the groove, the movable tooth can be retracted into the groove, and after the movable tooth is retracted into the groove, the telescopic spring can drive the movable tooth to pop out.

[0009] Furthermore, the size of the slot opening is the same as that of the slide slot opening, and one third of the locking block is in the slot in the initial state, and the locking block is stuck in the slot so that the movable teeth cannot be retracted into the groove.

[0010] Furthermore, the deceleration mechanism includes a bracket, which is fixedly connected to the front end of the slider, the middle part of the bracket is rotatably connected to a rotating rod, both ends of the rotating rod are fixedly connected to rollers, a groove is provided on the surface of the roller, an elastic spring is fixedly connected to the inner wall of the groove, and a resistance block is slidably connected to the inside of the groove through the elastic spring.

[0011] Furthermore, the surface of the roller fits with the inner surface of the slide rail, and the resistance block is completely in the groove in the initial state. When the slider moves, it will drive the roller to rub against the slide rail, thereby causing the roller to rotate. When the resistance block is completely in the groove, it will not affect the movement of the slider.

[0012] Furthermore, the resistance block is made of rubber, and one end of the resistance block away from the elastic spring is uneven. When the uneven end of the resistance block made of rubber comes into contact with an object, greater resistance will be generated.

[0013] The utility model has the following beneficial effects:

[0014] 1. The utility model is provided with a locking mechanism, so that at the beginning, the locking block is stuck in the slot at the rear end of the movable teeth, so that the slider cannot move inside the slide rail under the restriction of the movable teeth and the fixed rack, so that the projection board is fixed and cannot move. When it is necessary to move, the locking block is pulled out by the pull ring, and the slider can move in the slide rail to adjust the distance of the projection board.

[0015] 2. The utility model is provided with a deceleration mechanism, so that when the locking block is pulled out, the slider can be moved in the slide rail, and the slider can be decelerated through the cooperation of components such as rollers and resistance blocks, thereby preventing the slider from moving too fast, thereby causing the projection board to move too fast and cause impact, resulting in vibration and damage to the projection board.

[0016] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 It is a three-dimensional front view of the overall structure of the utility model;

[0019] Figure 2 It is a three-dimensional back view of the overall structure of the utility model;

[0020] Figure 3 It is a three-dimensional schematic diagram of the locking mechanism structure of the utility model;

[0021] Figure 4 For this utility model Figure 3 A three-dimensional enlarged view of the structure at A in the middle;

[0022] Figure 5 It is a three-dimensional schematic diagram of the speed reduction mechanism structure of the utility model;

[0023] Figure 6 For this utility model Figure 5 A three-dimensional enlarged image of the structure at B in the middle.

[0024] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0025] 1. Support frame; 2. Horizontal plate; 3. Telescopic rod A; 4. Telescopic rod B; 5. Projector mounting plate; 6. Slide rail; 7. Slider; 8. Connecting plate; 9. Telescopic rod C; 10. Projection board; 11. Locking mechanism; 111. Fixed rack; 112. Groove; 113. Telescopic spring; 114. Movable teeth; 115. Slot; 116. Slide; 117. Locking block; 118. Pull ring; 12. Speed ​​reduction mechanism; 121. Bracket; 122. Rotating rod; 123. Roller; 124. Slot body; 125. Elastic spring; 126. Resistance block. DETAILED DESCRIPTION

[0026] 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 of 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.

[0027] See also Figure 1-6 The utility model is an engineering cost calculation device, including a support frame 1, a horizontal plate 2 is movably installed on the inner side of the support frame 1, a telescopic rod A3 is fixedly connected to the bottom of the horizontal plate 2, a telescopic rod B4 is fixedly connected to the end of the telescopic rod A3 away from the horizontal plate 2, a projector mounting plate 5 is fixedly connected to the top of the telescopic rod B4, a slide rail 6 is fixedly connected to the rear end of the horizontal plate 2, a slider 7 is slidably connected to the inside of the slide rail 6, a connecting plate 8 is fixedly connected to the end of the slider 7 away from the slide rail 6, a telescopic rod C9 is fixedly connected to the top of the connecting plate 8, a projection board 10 is rotatably connected to the top of the telescopic rod C9, and a locking mechanism is arranged inside the slide rail 6 11. A speed reduction mechanism 12 is provided at the rear end of the slider 7. The locking mechanism 11 includes a fixed rack 111, a groove 112 and a slide groove 116. The fixed rack 111 is fixedly connected to the inner wall of the slide rail 6. The groove 112 is arranged on the side of the slider 7. A telescopic spring 113 is fixedly connected to the inner wall of the groove 112. A movable tooth 114 is slidably connected inside the groove 112 through the telescopic spring 113. A slot 115 is arranged at the rear end of the movable tooth 114. The slide groove 116 is arranged at the rear end of the slider 7. A locking block 117 is slidably connected inside the slide groove 116. A pull ring 118 is fixedly connected to the rear end of the locking block 117.

[0028] The surface of the movable tooth 114 is smooth, and in the initial state, the end of the movable tooth 114 away from the groove 112 is close to the fixed rack 111. The surface of the movable tooth 114 is smooth and the friction is small. When the slider 7 moves, it will drive the movable tooth 114 to contact the teeth on the fixed rack 111.

[0029] The depth of the groove 112 is greater than the length of the movable tooth 114, and the elastic force of the telescopic spring 113 is greater than the friction between the movable tooth 114 and the groove 112. The movable tooth 114 can be retracted into the groove 112. After the movable tooth 114 is retracted into the groove 112, the telescopic spring 113 can drive the movable tooth 114 to pop out.

[0030] The opening size of the slot 115 is the same as that of the slide slot 116 , and one third of the locking block 117 is in the slot 115 in the initial state. The locking block 117 is stuck in the slot 115 so that the movable tooth 114 cannot be retracted into the groove 112 .

[0031] The speed reduction mechanism 12 includes a bracket 121, which is fixedly connected to the front end of the slider 7. The middle part of the bracket 121 is rotatably connected to a rotating rod 122, and both ends of the rotating rod 122 are fixedly connected to rollers 123. A groove 124 is provided on the surface of the roller 123, and an elastic spring 125 is fixedly connected to the inner wall of the groove 124. The interior of the groove 124 is slidably connected to a resistance block 126 through the elastic spring 125.

[0032] The surface of the roller 123 fits with the inner surface of the slide rail 6, and the resistance block 126 is completely in the groove 124 in the initial state. When the slider 7 moves, it will drive the roller 123 to rub against the slide rail 6, so that the roller 123 rotates. When the resistance block 126 is completely in the groove 124, it will not affect the movement of the slider 7.

[0033] The resistance block 126 is made of rubber, and one end of the resistance block 126 away from the elastic spring 125 is uneven. When the uneven end of the resistance block 126 made of rubber comes into contact with an object, greater resistance will be generated.

[0034] A specific application of this embodiment is: the distance of the projector mounting plate 5 is adjusted by telescoping the telescopic rod A3, and the height of the projector mounting plate 5 is adjusted by telescoping the telescopic rod B4. When the distance of the projection board 10 needs to be adjusted, the lock block 117 is pulled out by the pull ring 118, so that the lock block 117 leaves the card slot 115. At this time, the slider 7 can move in the slide rail 6, and the movable teeth 114 will be retracted into the groove 112 when they are in contact with the teeth on the fixed rack 111 and squeezed. Then the telescopic spring 113 rebounds and drives the movable teeth 114 to pop out. At this time, the distance between the front and rear of the projection board 10 can be adjusted. When the adjustment is completed and the projection is used, the lock block 117 can be pushed back, and the lock block 117 is partially inserted into the card slot 115 so that the movable teeth 114 cannot be retracted into the groove 112. When the slider 7 moves too fast, the roller 123 rotates faster, and the centrifugal force generated by the faster rotation of the roller 123 will throw the resistance block 126 out. At this time, the uneven end of the resistance block 126 will rub against the slide rail 6 to generate a large resistance to slow down the movement speed of the slider 7, thereby preventing the slider 7 from moving too fast and driving the projection board 10 to move too fast, resulting in an impact and vibration that damages the projection board 10.

[0035] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0036] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A construction cost calculation device, comprising a support frame (1), characterized in that: A transverse plate (2) is movably mounted on the inner side of the support frame (1); a telescopic rod A (3) is fixedly connected to the bottom of the transverse plate (2); an end of the telescopic rod A (3) away from the transverse plate (2) is fixedly connected to a telescopic rod B (4); a top of the telescopic rod B (4) is fixedly connected to a projector mounting plate (5); a rear end of the transverse plate (2) is fixedly connected to a slide rail (6); a slider (7) is slidably connected inside the slide rail (6); an end of the slider (7) away from the slide rail (6) is fixedly connected to a connecting plate (8); a telescopic rod C (9) is fixedly connected to the top of the connecting plate (8); a projection plate (10) is rotatably connected to the top of the telescopic rod C (9); a locking mechanism (11) is provided inside the slide rail (6); a speed reduction mechanism (12) is provided at the rear end of the slider (7); The locking mechanism (11) comprises a fixed rack (111), a groove (112) and a slide groove (116); the fixed rack (111) is fixedly connected to the inner wall of the slide rail (6); the groove (112) is arranged on the side of the slide block (7); a telescopic spring (113) is fixedly connected to the inner wall of the groove (112); a movable tooth (114) is slidably connected to the interior of the groove (112) via the telescopic spring (113); a clamping groove (115) is arranged at the rear end of the slide block (7); a locking block (117) is slidably connected to the interior of the slide groove (116); and a pull ring (118) is fixedly connected to the rear end of the locking block (117).

2. The engineering cost calculation device according to claim 1, characterized in that: The surface of the movable tooth (114) is smooth, and in an initial state, one end of the movable tooth (114) away from the groove (112) is close to the fixed rack (111).

3. The engineering cost calculation device according to claim 2, characterized in that: The depth of the groove (112) is greater than the length of the movable tooth (114), and the elastic force of the telescopic spring (113) is greater than the friction force between the movable tooth (114) and the groove (112).

4. The engineering cost calculation device according to claim 3, characterized in that: The opening size of the card slot (115) is the same as the opening size of the slide slot (116), and one third of the locking block (117) is located in the card slot (115) in the initial state.

5. The engineering cost calculation device according to claim 4, characterized in that: The deceleration mechanism (12) comprises a bracket (121), the bracket (121) is fixedly connected to the front end of the slider (7), the middle part of the bracket (121) is rotatably connected to a rotating rod (122), both ends of the rotating rod (122) are fixedly connected to rollers (123), a groove (124) is provided on the surface of the roller (123), an elastic spring (125) is fixedly connected to the inner wall of the groove (124), and a resistance block (126) is slidably connected to the interior of the groove (124) via the elastic spring (125).

6. The engineering cost calculation device according to claim 5, characterized in that: The surface of the roller (123) is in contact with the inner surface of the slide rail (6), and the resistance block (126) is completely located in the groove body (124) in the initial state.

7. The engineering cost calculation device according to claim 6, characterized in that: The resistance block (126) is made of rubber, and one end of the resistance block (126) away from the elastic spring (125) is uneven.

Images