CN212256671U

CN212256671U - Force composition and decomposition demonstration teaching device

Info

Publication number: CN212256671U
Application number: CN202020683649.9U
Authority: CN
Inventors: 丁彤
Original assignee: Hebei Chengfeng Enterprise Consulting Management Co ltd
Current assignee: Hebei Chengfeng Enterprise Consulting Management Co ltd
Priority date: 2020-04-29
Filing date: 2020-04-29
Publication date: 2020-12-29
Anticipated expiration: 2030-04-29

Abstract

The utility model relates to a physics demonstration teaching aid technical field especially relates to a composition of power and decomposition demonstration teaching device. The first sliding block and the second sliding block are arranged on a sliding way of a bracket, a third pulley and a fourth pulley are arranged at two ends of the sliding way, and the first pulley and the second pulley are respectively arranged on the first sliding block and the second sliding block; the bracket is provided with a spring dynamometer and an angle scale, the angle scale is connected by a first string, and the first string is connected with a first weight through a first pulley and a third pulley; the angle scale is connected with the second string, the structure that the second pulley and the fourth pulley are connected with the second weight is adopted, the problem that the student cannot observe visually when the student is synthesizing and decomposing the learning force is solved, and in addition, a teacher only has simple figures and teaching aid demonstration and description when the student is synthesizing and decomposing the explaining force, the force related to a real object cannot be measured, the mode hardly enables the student to generate visual concepts, and the problem that the student accurately and effectively understands the synthesizing and decomposing essence of the force cannot be solved.

Description

Force composition and decomposition demonstration teaching device

Technical Field

The utility model relates to a physics demonstration teaching aid technical field especially relates to a composition of power and decomposition demonstration teaching device.

Background

Mechanics is the key knowledge in physics, synthesis and decomposition of force are the basis of learning mechanics, the synthesis of force is the process of knowing several resultant forces, the decomposition of force is the process of knowing one resultant force, if the effect of the several forces acting on an object together is the same as the effect of one force acting on the object alone, the angle of the force is used as the resultant force of the several forces, the several forces are called the component force of the force, and the synthesis and decomposition of force follow the parallelogram rule. Because the synthesis and the decomposition of the force are abstract, the force can not be observed visually, and a teacher can not measure the force related to a real object only through simple figure and teaching aid demonstration and description when explaining the synthesis and the decomposition of the force.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the utility model is to provide a force synthesis and decomposition demonstration teaching device aiming at the technical defects, wherein a first slide block and a second slide block are arranged on a slide way of a bracket, a third pulley and a fourth pulley are arranged at two ends of the slide way, and the first slide block and the second slide block are respectively provided with a first pulley and a second pulley; the bracket is provided with a spring dynamometer and an angle scale, the angle scale is connected by a first string, and the first string is connected with a first weight through a first pulley and a third pulley; the angle scale is connected with the second string, the structure that the second pulley and the fourth pulley are connected with the second weight is adopted, the problem that the student cannot observe visually when the student is synthesizing and decomposing the learning force is solved, and in addition, a teacher only has simple figures and teaching aid demonstration and description when the student is synthesizing and decomposing the explaining force, the force related to a real object cannot be measured, the mode hardly enables the student to generate visual concepts, and the problem that the student accurately and effectively understands the synthesizing and decomposing essence of the force cannot be solved.

In order to solve the technical problem, the utility model discloses the technical scheme who adopts is: the spring force measuring device comprises a bottom plate, wherein a support is arranged above the bottom plate, notches are formed in the side surfaces of two sides of the support, a hanging ring is arranged above the support, a spring force measuring meter is arranged below the hanging ring, and the hanging ring is connected with the spring force measuring meter through a hook; an angle scale is arranged below the spring dynamometer, and the bottom plate is connected with the bracket through a bolt; the lower part of the bracket is provided with two symmetrical slideways which transversely penetrate through the bracket, a third pulley and a fourth pulley are arranged at two ends of each slideway, a first rack is arranged on the lower surface of each slideway, and the third pulley and the fourth pulley are connected with the slideways through bolts; the slide on set up the first slider and the second slider that the structure is the same, first slider top have first pulley, second slider top have the second pulley, foretell first slider and second slider and slide sliding fit.

Further optimizing the technical scheme, an upright post is arranged at the center of the angle scale, a T-shaped groove is formed in the upright post in a surrounding mode, a first hanging lug, a second hanging lug and a third hanging lug are arranged in the groove and are in sliding fit with the upright post, and the spring dynamometer is connected with the third hanging lug through a hook; the angle scale is provided with a first thin rope and a second thin rope, one end of the first thin rope is connected with the first hanging lug through a hook, the first thin rope passes through the first pulley and the third pulley, the other end of the first thin rope is provided with a first hanging code, and the first thin rope is connected with the first hanging code through a hook; one end of the second thin rope is connected with the second hanging lug through a hook, the second thin rope passes through the second pulley and the fourth pulley, the other end of the second thin rope is provided with a second hanging code, and the second thin rope and the second hanging code are connected through a hook.

The technical scheme is further optimized, wherein a first transmission rod is arranged at the lower part of the first sliding block and penetrates through the first sliding block, and the first transmission rod is connected with the first sliding block through a bearing; the first transmission rod is provided with a first gear, the first gear is meshed with the first rack, and the first gear is in key connection with the first transmission rod; one end of the first transmission rod is provided with a first turntable, and the first turntable is connected with the first transmission rod through a key; a first locking mechanism is arranged on the side edge of the lower part of the first sliding block; the second slide block is provided with a second transmission rod, a second gear, a second rotary disc and a second locking mechanism, and the connection mode and the structure of the second transmission rod, the second gear, the second rotary disc and the second locking mechanism are the same as those of the first slide block.

Further optimizing the technical scheme, the first locking mechanism comprises a first base, a first cross frame is arranged on the upper surface of the first base, a first fixed shaft is arranged on the first cross frame, a first locking block is arranged on the first cross frame, a second rack is arranged on the first locking block, and the first locking block is connected with the first fixed shaft through a bearing; the first spring is arranged at the center of the upper surface of the first base, the first baffle is arranged on the upper surface of the first base, and the second locking mechanism comprises a second base, a second cross frame, a second fixing shaft, a second locking block, a third rack, a second spring and a second baffle which are connected in the same way and structure as the first locking mechanism.

Compared with the prior art, the utility model has the advantages of it is following: 1. the angle scale is provided with the first hanging lug, the second hanging lug and the third hanging lug, and the structure is favorable for ensuring that the angle scale can be pulled from three different directions; 2. a spring dynamometer is arranged below the suspension loop, and the structure is favorable for ensuring that the resultant force of the first string and the second string on the angle dial can be seen; 3. an angle scale is arranged below the spring dynamometer, and the structure is favorable for ensuring that the angle between the first string and the second string can be seen; 4. the first sliding block and the second sliding block which are identical in structure are arranged on the slide way, and the structure is favorable for ensuring that the angle between the first thin rope and the second thin rope is adjusted by adjusting the position of the first sliding block or the second sliding block; 5. the first gear and the second gear are meshed with the first rack, and the structure is favorable for ensuring that the position of the first sliding block or the second sliding block is adjusted by rotating the first rotating disc or the second rotating disc; 6. the first or second locking means are advantageously provided on the lower side of the first or second slide, which advantageously ensures that the first or second slide can be fixed in position.

Drawings

Fig. 1 is a schematic view of the overall structure of a force composition and decomposition demonstration teaching device.

Fig. 2 is a partial structural schematic diagram of a force composition and decomposition demonstration teaching device.

Fig. 3 is a schematic view of an angle scale structure of a force composition and decomposition demonstration teaching device.

Fig. 4 is a schematic view of a locking device of a force composition and decomposition demonstration teaching device.

FIG. 5 is a partial schematic view of a force composition and resolution demonstration teaching device.

In the figure: 1. a base plate; 2. a spring load cell; 3. an angle scale; 101. a support; 102. a notch; 103. hanging a ring; 104. a slideway; 105. a third pulley; 106. a fourth pulley; 107. a first rack; 108. a first slider; 109. a second slider; 110. a first pulley; 111. a second pulley; 112. a first drive lever; 113. a first gear; 114. a first turntable; 115. a first locking mechanism; 116. a second transmission rod; 117. a second gear; 118. a second turntable; 119. a second locking mechanism; 120. a first base; 121. a first cross frame; 122. a first fixed shaft; 123. a first locking block; 124. a second rack; 125. a first spring; 126. a first baffle plate; 127. a second base; 128. a second cross frame; 129. a second fixed shaft; 130. a second lock block; 131. a third rack; 132. a second spring; 133. a second baffle; 301. a column; 302. a groove; 303. a first suspension loop; 304. a second suspension loop; 305. a third suspension loop; 306. a first string; 307. a second string; 308. a first hanging code; 309. and a second hanging code.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings. It should be understood that the description is intended to be illustrative only and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.

The first embodiment is as follows: as shown in fig. 1-5, the device comprises a bottom plate 1, a support 101 is arranged above the bottom plate 1, notches 102 are arranged on two side surfaces of the support 101, a hanging ring 103 is arranged above the support 101, a spring dynamometer 2 is arranged below the hanging ring 103, and the hanging ring 103 is connected with the spring dynamometer 2 through a hook; an angle scale 3 is arranged below the spring dynamometer 2, and the bottom plate 1 is connected with the bracket 101 through bolts; the lower part of the bracket 101 is provided with two symmetrical slide ways 104 which cross the bracket 101, the two ends of the slide way 104 are provided with a third pulley 105 and a fourth pulley 106, the lower surface of the slide way 104 is provided with a first rack 107, and the third pulley 105 and the fourth pulley 106 are connected with the slide way 104 through bolts; a first sliding block 108 and a second sliding block 109 which have the same structure are arranged on the slide way 104, a first pulley 110 is arranged above the first sliding block 108, a second pulley 111 is arranged above the second sliding block 109, and the first sliding block 108 and the second sliding block 109 are in sliding fit with the slide way 104; a vertical column 301 is arranged at the center of the angle scale 3, a T-shaped groove 302 is arranged on the vertical column 301 in a surrounding manner, a first hanging lug 303, a second hanging lug 304 and a third hanging lug 305 are arranged in the groove 302, the first hanging lug 303, the second hanging lug 304 and the third hanging lug 305 are in sliding fit with the vertical column 301, and the spring dynamometer 2 is connected with the third hanging lug 305 through a hook; a first string 306 and a second string 307 are arranged on the angle scale 3, one end of the first string 306 is connected with the first hanging lug 303 through a hook, the first string 306 passes through the first pulley 110 and the third pulley 105, the other end of the first string 306 is provided with a first hanging code 308, and the first string 306 is connected with the first hanging code 308 through a hook; one end of the second string 307 is connected with the second hanging lug 304 through a hook, the second string 307 passes through the second pulley 111 and the fourth pulley 106, the other end of the second string 307 is provided with a second hanging code 309, and the second string 307 is connected with the second hanging code 309 through a hook; a first transmission rod 112 is arranged at the lower part of the first sliding block 108, the first transmission rod 112 penetrates through the first sliding block 108, and the first transmission rod 112 is connected with the first sliding block 108 through a bearing; the first transmission rod 112 is provided with a first gear 113, the first gear 113 is meshed with the first rack 107, and the first gear 113 is connected with the first transmission rod 112 through a key; a first rotating disc 114 is arranged at one end of the first transmission rod 112, and the first rotating disc 114 is connected with the first transmission rod 112 through a key; the lower side edge of the first sliding block 108 is provided with a first locking mechanism 115; the second slide block 109 is provided with a second transmission rod 116, a second gear 117, a second rotary disc 118 and a second locking mechanism 119, and the connection mode and the structure are the same as those of the first slide block 108; the first locking mechanism 115 comprises a first base 120, a first cross frame 121 is arranged on the upper surface of the first base 120, a first fixed shaft 122 is arranged on the first cross frame 121, a first locking block 123 is arranged on the first cross frame 121, a second rack 124 is arranged on the first locking block 123, and the first locking block 123 is connected with the first fixed shaft 122 through a bearing; the first spring 125 is disposed at the center of the upper surface of the first base 120, the first baffle 126 is disposed on the upper surface of the first base 120, and the second locking mechanism 119 includes a second base 127, a second cross frame 128, a second fixing shaft 129, a second locking block 130, a third rack 131, a second spring 132 and a second baffle 133, which are connected in the same manner and structure as the first locking mechanism 115.

When the angle scale is used, in the first step, as shown in fig. 1-5, when the first turntable 114 or the second turntable 118 is rotated during teaching and demonstration by using the device, at this time, the first gear 113 or the second gear 117 also starts to rotate, and simultaneously the first slider 108 or the second slider 109 is driven to move on the slideway 104, the included angle between the first string 306 and the second string 307 also changes, the degree of the included angle can be read from the angle scale 3, and the gravity of the angle scale 3 is F₄When the included angle is alpha, the first locking block 123 and the second locking block 130 are respectively moved out of the first baffle plate 126 and the second baffle plate 133, the first baffle plate 126 and the second baffle plate 133 are respectively rotated upwards under the action of the first spring 125 and the second spring 132, the second rack 124 and the third rack 131 are meshed with the first rack 107 to limit the first slider 108 and the second slider 109 to move, hanging weights are respectively added on the first hanging weight 308 and the second hanging weight 309, and the total gravity of the first hanging weight 308 and the added weight is F₁The total weight of the second hanging weight 309 and the added hanging weight isF₂The index of the spring dynamometer 2 is F, according to the force synthesis formula, F₁And F₂Resultant force F of₃=

Finally to F₃+F₄=F。

Step two, as shown in FIGS. 1-5, when F₁And F₂The magnitude is not changed, the first slide block 108 or the second slide block 109 is moved by the method in the step one to change alpha, when the alpha is increased, the index F of the resultant force spring dynamometer 2 is reduced, and the resultant force F can be obtained₃It will also decrease. The index F of the resultant force spring dynamometer 2 increases when alpha decreases, and the resultant force F is obtained₃Will also increase; when F is present₁Or F₂When the force is increased, the index F of the spring dynamometer 2 is increased to obtain a resultant force F₃Will also increase when F₁Or F₂When decreasing, the index F of the spring force gauge 2 decreases, resulting in a resultant force F₃It will also decrease.

The utility model discloses a control mode comes automatic control through the controller, and the control circuit of controller can realize through the simple programming of technical staff in this field, belongs to the common general knowledge in this field, and the utility model discloses mainly be used for protecting the machinery setting, so the utility model discloses no longer explain control mode and circuit connection in detail.

It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explaining the principles of the invention and are not to be construed as limiting the invention. Therefore, any modification, equivalent replacement, improvement and the like made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. Further, it is intended that the appended claims cover all such variations and modifications as fall within the scope and boundaries of the appended claims or the equivalents of such scope and boundaries.

Claims

1. The utility model provides a composition of force and decomposition demonstration teaching device which characterized in that: the novel spring force measuring device comprises a bottom plate (1), a support (101) is arranged above the bottom plate (1), notches (102) are formed in the side faces of two sides of the support (101), a hanging ring (103) is arranged above the support (101), a spring force gauge (2) is arranged below the hanging ring (103), the hanging ring (103) is connected with the spring force gauge (2) through a hook, an angle scale (3) is arranged below the spring force gauge (2), and the bottom plate (1) is connected with the support (101) through bolts; the lower part of the bracket (101) is provided with two symmetrical slide ways (104) which transversely penetrate through the bracket (101), the two ends of each slide way (104) are provided with a third pulley (105) and a fourth pulley (106), the lower surface of each slide way (104) is provided with a first rack (107), and the third pulley (105) and the fourth pulley (106) are connected with the slide ways (104) through bolts; the sliding way (104) is provided with a first sliding block (108) and a second sliding block (109) which have the same structure, a first pulley (110) is arranged above the first sliding block (108), a second pulley (111) is arranged above the second sliding block (109), and the first sliding block (108) and the second sliding block (109) are in sliding fit with the sliding way (104).

2. A force synthesis and resolution demonstration teaching device according to claim 1 wherein: an upright post (301) is arranged at the center of the angle scale (3), a T-shaped groove (302) is formed in the upright post (301) in a surrounding mode, a first hanging lug (303), a second hanging lug (304) and a third hanging lug (305) are arranged in the groove (302), the first hanging lug (303), the second hanging lug (304) and the third hanging lug (305) are in sliding fit with the upright post (301), and the spring dynamometer (2) is connected with the third hanging lug (305) through a hook; a first string (306) and a second string (307) are arranged on the angle scale (3), one end of the first string (306) is connected with a first hanging lug (303) through a hook, the first string (306) passes through a first pulley (110) and a third pulley (105), a first hanging code (308) is arranged at the other end of the first string (306), and the first string (306) is connected with the first hanging code (308) through a hook; one end of the second thin rope (307) is connected with the second hanging lug (304) through a hook, the second thin rope (307) passes through the second pulley (111) and the fourth pulley (106), the other end of the second thin rope (307) is provided with a second hanging code (309), and the second thin rope (307) is connected with the second hanging code (309) through a hook.

3. A force synthesis and resolution demonstration teaching device according to claim 1 wherein: a first transmission rod (112) is arranged at the lower part of the first sliding block (108), the first transmission rod (112) penetrates through the first sliding block (108), and the first transmission rod (112) is connected with the first sliding block (108) through a bearing; the first transmission rod (112) is provided with a first gear (113), the first gear (113) is meshed with the first rack (107), and the first gear (113) is connected with the first transmission rod (112) through a key; one end of the first transmission rod (112) is provided with a first rotary disc (114), and the first rotary disc (114) is connected with the first transmission rod (112) through a key; a first locking mechanism (115) is arranged on the lower side edge of the first sliding block (108); the second sliding block (109) is provided with a second transmission rod (116), a second gear (117), a second rotating disc (118) and a second locking mechanism (119), and the connection mode and the structure of the second sliding block are the same as those of the first sliding block (108).

4. A force synthesis and resolution demonstration teaching device according to claim 3 wherein: the first locking mechanism (115) comprises a first base (120), a first transverse frame (121) is arranged on the upper surface of the first base (120), a first fixed shaft (122) is arranged on the first transverse frame (121), a first locking block (123) is arranged on the first transverse frame (121), a second rack (124) is arranged on the first locking block (123), and the first locking block (123) is connected with the first fixed shaft (122) through a bearing; the center of the upper surface of the first base (120) is provided with a first spring (125), the upper surface of the first base (120) is provided with a first baffle plate (126), and the second locking mechanism (119) comprises a second base (127), a second transverse frame (128), a second fixed shaft (129), a second locking block (130), a third rack (131), a second spring (132) and a second baffle plate (133) which are connected in the same way and structure as the first locking mechanism (115).