CN218545493U - General type slide detection tool - Google Patents

Abstract

The utility model relates to the technical field of detection tools, in particular to a universal slide detection tool, wherein a pushing module is slidably arranged in the middle of a fixed main body; the pushing module comprises a pushing block and a pushing screw rod connected with the pushing block, the pushing block is an isosceles trapezoid body, and the pushing block comprises a first pushing inclined plane and a second pushing inclined plane; a first sliding block and a second sliding block are respectively arranged on two opposite sides of the fixed main body, a first sliding inclined surface matched with the first pushing inclined surface is arranged on one side, close to the pushing block, of the first sliding block, and a second sliding inclined surface matched with the second pushing inclined surface is arranged on one side, close to the pushing block, of the second sliding block; the pushing block is connected with the first sliding block and the second sliding block in a sliding mode, and the sliding directions of the first sliding block and the second sliding block are opposite; the utility model discloses can be applicable to the detection of not unidimensional slide, have the advantage that the commonality is strong, detect the use when effectively reducing tool manufacturing cost and being convenient for production.

Description

General type slide detection tool

Technical Field

The utility model relates to a detection tool technical field especially relates to a general type slide detection tool.

Background

In the box part of communication, new forms of energy and electronic product, plug-in box and rack are used mostly, and generally all have the slide structure in plug-in box or the rack, and the grafting equipment of other modules can be convenient for to the slide structure, consequently, the production requirement to the slide is higher, needs the strict control slide size, ensures that the plug of slide is smooth and easy.

In the prior art, the size of the slide way is too large, the conventional caliper can not be measured, and the size of the slide way can be measured by means of a slide way detection jig so as to ensure the precision of the slide way.

SUMMERY OF THE UTILITY MODEL

To the detection tool of the aforesaid existence a great deal of, manufacturing cost increases and is unfavorable for the problem that detects when producing and use, the utility model provides a general type slide detection tool can be applicable to the detection of not unidimensional slide, has the advantage that the commonality is strong, detects when effectively reducing tool manufacturing cost and being convenient for produce and uses.

In order to solve the technical problem, the utility model provides a concrete scheme as follows:

a universal slide way detection jig comprises a fixed main body, wherein a pushing module is slidably mounted in the middle of the fixed main body; the pushing module comprises a pushing block and a pushing screw rod connected with the pushing block, the pushing block is an isosceles trapezoid body, and the pushing block comprises a first pushing inclined plane and a second pushing inclined plane;

a first sliding block and a second sliding block are respectively arranged on two opposite sides of the fixed main body, a first sliding inclined surface matched with the first pushing inclined surface is arranged on one side, close to the pushing block, of the first sliding block, and a second sliding inclined surface matched with the second pushing inclined surface is arranged on one side, close to the pushing block, of the second sliding block;

the pushing block is connected with the first sliding block and the second sliding block in a sliding mode, and the sliding directions of the first sliding block and the second sliding block are opposite.

Optionally, the fixing body is a quadrilateral frame body, a sliding groove for pushing the block to slide is arranged in the middle of the fixing body, and the sliding groove is an isosceles trapezoid body;

the relative both sides of fixed main part are provided with first installation trompil and second installation trompil respectively, first installation trompil, second installation trompil all communicate with the sliding tray, first slider slidable mounting is in first installation trompil, second slider slidable mounting is in second installation trompil, utilizes the sliding tray to play certain direction and limiting displacement to the slip that promotes the piece to through the intercommunication relation of first installation trompil, second installation trompil and sliding tray, when making to promote the piece and slide, can drive first slider and second slider and remove to opposite direction, and then increase or reduce the distance between first slider and the second slider.

Optionally, the first slider includes a first detection contact end and a first mounting end connected to the first detection contact end, and the first mounting end is slidably mounted in the first mounting opening;

the first detection contact end is a cuboid, the first installation end is a right-angle trapezoidal body, the first sliding inclined plane is located on the first installation end, the first detection contact end is arranged to be the cuboid, and the requirements for plugging and pulling of the slide way and detection of the size can be met.

Optionally, the second slider includes a second detection contact end and a second mounting end connected to the second detection contact end, and the second mounting end is slidably mounted in the second mounting opening;

the second detects the contact jaw and is the cuboid, the second installation end is right angle trapezoidal body, second slip inclined plane is located the second installation end, sets up first detection contact jaw into the cuboid, can satisfy the detection demand to the plug of slide and size.

Optionally, a first guide limiting unit used for guiding the sliding direction of the first slider and a second guide limiting unit used for guiding the sliding direction of the second slider are arranged on the fixing main body, so that the sliding stability of the first slider and the second slider is ensured, and the detection accuracy of the detection jig is further improved.

Optionally, the first guide limiting unit includes a first fixing screw, a first guide limiting hole matched with the first fixing screw is arranged in the sliding direction of the first detection contact end, the first guide limiting hole is a circular hole, and the diameter of the first guide limiting hole is the same as the diameter of the head of the first fixing screw;

the second guide limiting unit comprises a second fixing screw, a second guide limiting hole matched with the second fixing screw is formed in the sliding direction of the second detection contact end, the second guide limiting hole is a circular hole, the diameter of the second guide limiting hole is the same as the diameter of the head of the second fixing screw, the diameter of the first guide limiting hole is the same as the diameter of the head of the first fixing screw, the diameter of the second guide limiting hole is the same as the diameter of the head of the second fixing screw, and when the first sliding block and the second sliding block slide unstably or unbalanced, the sliding of the first sliding block and the second sliding block is limited so as to ensure the accuracy of the detection size.

Optionally, the number of the first fixing screws and the number of the first guide limiting holes are two, and the two first guide limiting holes are respectively located at two ends of the first detection contact end parallel to the sliding direction of the pushing block;

the number of the second fixing screws and the number of the second guide limiting holes are two, and the two second guide limiting holes are respectively positioned at two ends, parallel to the sliding direction of the pushing block, of the second detection contact end, so that the unstable or unbalanced sliding of the first sliding block and the second sliding block is better limited.

Optionally, the outside cover of first fixed screw is equipped with first reset spring, the outside cover of second fixed screw is equipped with second reset spring, makes first slider reset under the effect of first reset spring, makes the second slider reset under the effect of second reset spring, improves the convenience of detection operation.

Optionally, a sliding guide pin is arranged in the sliding groove, and a sliding guide mounting hole matched with the sliding guide pin is formed in the pushing direction of the pushing block, so that the sliding stability of the pushing block is ensured.

Optionally, fixed main part is provided with the scale on the slip direction that promotes the piece and marks, is convenient for detect not unidimensional slide and carry out the record, improves the convenience of use.

Compared with the prior art, the beneficial effects of the utility model reside in that: the utility model provides a pair of lift of general type slide detection can be applicable to the detection of not unidimensional slide, has the advantage that the commonality is strong, detects the use when effectively reducing tool manufacturing cost and being convenient for production.

Drawings

Fig. 1 is a schematic view of an overall structure of a universal slide way detection fixture provided in an embodiment of the present invention;

fig. 2 is an exploded view of a universal slide way detecting jig according to an embodiment of the present invention;

fig. 3 is a schematic structural view of a pushing block provided in an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a first slider provided in an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a second slider provided in an embodiment of the present invention;

fig. 6 is a schematic structural view of a fixing body provided in an embodiment of the present invention;

wherein, 1 is a fixed main body; 11 is a sliding groove; 12 is a first mounting opening; 13 is a second mounting opening; 14 is a sliding guide pin; 2 is a pushing module; 3 is a pushing block; 31 is a first push ramp; 32 is a second push ramp; 33 is a sliding guide mounting hole; 4 is a pushing screw rod; 5 is a first slide block; 51 is a first sliding slope; 52 is a first detection contact end; 521 is a first guide limit hole; 53 is a first mounting end; 6 is a second slide block; 61 is a second sliding inclined plane; 62 is a second detection contact end; 621 is a second guiding and limiting hole; 63 is a second mounting end; 7 is a first guide limit unit; 71 is a first fixing screw; 72 is a first return spring; 8 is a second guide limit unit; 81 is a second fixing screw; and 82 is a second return spring.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings of the embodiments of the present invention will be combined to clearly and completely describe the technical solutions of the embodiments of the present invention. The described embodiments are some, but not all embodiments of the invention.

Thus, the following detailed description of the embodiments of the present invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

For example, the slide way detection jig comprises a fixed main body, wherein a pushing module is slidably mounted in the middle of the fixed main body; the pushing module comprises a pushing block and a pushing screw rod connected with the pushing block, the pushing block is an isosceles trapezoid body, and the pushing block comprises a first pushing inclined plane and a second pushing inclined plane; a first sliding block and a second sliding block are respectively arranged on two opposite sides of the fixed main body, a first sliding inclined surface matched with the first pushing inclined surface is arranged on one side, close to the pushing block, of the first sliding block, and a second sliding inclined surface matched with the second pushing inclined surface is arranged on one side, close to the pushing block, of the second sliding block; the pushing block is connected with the first sliding block and the second sliding block in a sliding mode, and the sliding directions of the first sliding block and the second sliding block are opposite.

The utility model provides a general type slide detects and lifts, can be applicable to the detection of not unidimensional slide, has the advantage that the commonality is strong, detects when effectively reducing tool manufacturing cost and being convenient for production and uses.

The first embodiment is as follows:

as shown in fig. 1 to 5, a universal slide rail detection fixture is used for detecting the size of a slide rail existing in an insert box or a cabinet, in order to facilitate the insertion and assembly of other modules in the existing insert box or cabinet, corresponding slide rails are distributed on two opposite side surfaces of the insert box or the cabinet, if a first slide rail is arranged on one side surface, and a second slide rail opposite to the first slide rail is arranged on the other side surface opposite to the side surface, so that two ends of other modules can be inserted into the insert box or the cabinet along the first slide rail and the second slide rail. The universal slide rail detection jig provided in the embodiment is used for detecting the size of a dimension between the first slide rail and the second slide rail.

Referring to fig. 2 and 3, this slide detection tool includes fixed main part 1, the middle part slidable mounting of fixed main part 1 has promotion module 2, it can slide along the middle part of fixed main part 1 promptly to promote module 2, promote module 2 including promoting piece 3 and with promoting the promotion screw rod 4 that piece 3 is connected, it can slide along the middle part of fixed main part 1 repeatedly under the effect that promotes screw rod 4 to promote piece 3, should promote piece 3 and be the isosceles trapezoid body, it includes first promotion inclined plane 31 and second promotion inclined plane 32 to promote piece 3.

Referring to fig. 1, 3 and 4, a first slider 5 and a second slider 6 are respectively disposed on two opposite sides of the fixed body 1, a first sliding inclined surface 51 matching with the first pushing inclined surface 31 is disposed on one side of the first slider 5 close to the pushing block 3, and a second sliding inclined surface 61 matching with the second pushing inclined surface 32 is disposed on one side of the second slider 6 close to the pushing block 3, as can be seen from the structure that the pushing block 3 is an isosceles trapezoid, the first slider 5 and the second slider 6 are arranged in a mirror image manner, the first sliding inclined surface 51 on the first slider 5 is in a parallel relationship with the first pushing inclined surface 31 of the pushing block 3, and the second sliding inclined surface 61 on the second slider 6 is in a parallel relationship with the second pushing inclined surface 32 of the pushing block 3, so that the first slider 5, the pushing block 3, the second slider 6 and the pushing block 3 can be in close contact with each other, the pushing block 3 is slidably connected with the first slider 5 and the second slider 6, and when the pushing block 3 slides along the middle of the fixed body 1 under the action of the pushing screw 4, the first slider 5 and the second slider 6 can be driven to slide, and the second slider 5 and the second slider 6 can slide in opposite directions.

Specifically, since the pushing block 3 is an isosceles trapezoid, when the pushing block 3 slides along the middle of the fixing body 1 under the action of the pushing screw 4, the first pushing inclined plane 31 and the second pushing inclined plane 32 on both sides of the pushing block 3 act on the first slider 5 and the second slider 6, so as to change the distance between the first slider 5 and the second slider 6, as described with reference to fig. 1, the end of the pushing block 3 away from the pushing screw 4 is set as the front end, when the pushing block 3 slides forward along the middle of the fixing body 1 under the action of the pushing screw 4, due to the action of the first pushing inclined plane 31 and the second pushing inclined plane 32, the pushing block 5 and the second slider 6 can be driven to slide in the direction away from the fixing body 1, so as to increase the distance between the first slider 5 and the second slider 6, when the distance between the first slider 5 and the second slider 6 needs to be reduced, only the pushing block 3 needs to be controlled to slide in the reverse direction.

In this example, the distance between the first slider 5 and the second slider 6 can be controlled according to actual requirements, so that the distance between the first slider 5 and the second slider 6 meets the size of the first slide and the second slide to be detected, and the detection device has the advantage of strong universality.

Example two:

as shown in fig. 6, the fixing body 1 is a quadrangular frame body, the middle part of the fixing body 1 is provided with a sliding groove 11 for pushing the block 3 to slide, the sliding groove 11 is an isosceles trapezoid body, and the sliding groove 11 with the structure can play a certain guiding and limiting role in sliding the block 3, so as to improve the detection accuracy of the detection jig.

The two opposite sides of the fixed main body 1 are respectively provided with a first installation hole 12 and a second installation hole 13, the first installation hole 12 and the second installation hole 13 are communicated with the sliding groove 11, the first sliding block 5 is slidably installed in the first installation hole 12, the second sliding block 6 is slidably installed in the second installation hole 13, and the first installation hole 12 and the second installation hole 13 are communicated with the sliding groove 11, so that the close contact between the pushing block 3 and the first sliding block 5 and the second sliding block 6 can be ensured, and when the pushing block 3 slides, the first sliding block 5 and the second sliding block 6 can be driven to move in opposite directions, and further the distance between the first sliding block 5 and the second sliding block 6 can be increased or reduced.

In this example, the first slider 5 includes a first detection contact end 52 and a first mounting end 53 connected to the first detection contact end 52, and the first mounting end 53 is slidably mounted in the first mounting opening 12; first detection contact terminal 52 is the cuboid, and first installation end 53 is the right angle trapezoidal body, and first slip inclined plane 51 is located first installation end 53, and the one side relative with first slip inclined plane 51 on the first installation end 53 is connected with first detection contact terminal 52 promptly, sets up first detection contact terminal 52 into the cuboid, can satisfy the detection demand to the plug of slide and size.

Similarly, the second slider 6 comprises a second detection contact end 62 and a second mounting end 63 connected with the second detection contact end 62, and the second mounting end 63 is slidably mounted in the second mounting opening 13; the second detects contact jaw 62 and is the cuboid, and second installation end 63 is the right angle trapezoidal body, and second slip inclined plane 61 is located second installation end 63, and the one side relative with second slip inclined plane 61 on the second installation end 63 is connected with second detection contact jaw 62 promptly, sets up second detection contact jaw 62 into the cuboid, can satisfy the detection demand to the plug of slide and size.

Example three:

referring to fig. 2, a first guiding and limiting unit 7 for guiding the sliding direction of the first slider 5 and a second guiding and limiting unit 8 for guiding the sliding direction of the second slider 6 are disposed on the fixing body 1, so as to ensure the sliding stability of the first slider 5 and the second slider 6, and further improve the detection accuracy of the detection jig.

Specifically, the first guide limiting unit 7 includes a first fixing screw 71, a first guide limiting hole 521 matched with the first fixing screw 71 is arranged in the sliding direction of the first detection contact end 52, the first guide limiting hole 521 is a circular hole, and the diameter of the first guide limiting hole 521 is the same as the diameter of the head of the first fixing screw 71; similarly, the second guiding and limiting unit 8 includes a second fixing screw 81, a second guiding and limiting hole 621 matched with the second fixing screw 81 is arranged in the sliding direction of the second detecting contact end 62, the second guiding and limiting hole 621 is a circular hole, and the diameter of the second guiding and limiting hole 621 is the same as the diameter of the head of the second fixing screw 81.

Since the diameter of the first guiding limiting hole 521 is the same as the diameter of the head of the first fixing screw 71, when the first slider 5 slides unstably or unbalanced, the first guiding limiting hole 521 deviates in direction along with the unstable or unbalanced sliding of the first slider 5, so that the head of the first fixing screw 71 interferes with the first guiding limiting hole 521, and the first slider 5 cannot slide smoothly; similarly, when the second slider 6 slides unstably or unbalanced, the second guiding hole 621 may deviate along with the unstable or unbalanced sliding of the second slider 6, so that the head of the second fixing screw 81 collides with the second guiding hole 621, and the second slider 6 cannot slide smoothly.

In this example, by setting the diameter of the first guide limiting hole 521 to be the same as the diameter of the head of the first fixing screw 71 and the diameter of the second guide limiting hole 621 to be the same as the diameter of the head of the second fixing screw 81, it is possible to limit the sliding of the first slider 5 and the second slider 6 when the unstable or unbalanced sliding occurs in the first slider 5 and the second slider 6, thereby ensuring the accuracy of the detection dimension.

In order to further improve the sliding guiding effect of the first fixing screw 71 on the first sliding block 5 and the sliding guiding effect of the second fixing screw 81 on the second sliding block 6, the number of the first fixing screws 71 and the number of the first guide limiting holes 521 are both set to be two, and the two first guide limiting holes 521 are respectively positioned at two ends of the first detection contact end 52 parallel to the sliding direction of the pushing block 3; the number of the second fixing screws 81 and the second guiding limiting holes 621 is set to be two, and the two second guiding limiting holes 621 are respectively located at two ends of the second detecting contact end 62 parallel to the sliding direction of the pushing block 3, so that the unstable or unbalanced sliding of the first sliding block 5 and the second sliding block 6 is better limited.

In this example, the first return spring 72 is fitted outside the first fixing screw 71, the second return spring 82 is fitted outside the second fixing screw 81, the first slider 5 is returned by the first return spring 72, and the second slider 6 is returned by the second return spring 82, thereby improving convenience of the detection operation.

In order to ensure the sliding stability of the pushing block 3, a sliding guide pin 14 is arranged in the sliding groove 11, a sliding guide mounting hole 33 matched with the sliding guide pin 14 is arranged in the pushing direction of the pushing block 3, and the sliding guide pin 14 penetrates through the sliding guide mounting hole 33 and plays a role in guiding the sliding of the pushing block 3.

Wherein, fixed main part 1 is provided with the scale on the sliding direction who promotes piece 3 and marks, marks through the scale and can be convenient for detect different size slides and carry out the record, improves the convenience of use.

According to the technical scheme of above-mentioned embodiment, the utility model provides a pair of general type slide detects and lifts, can be applicable to the detection of not unidimensional slide, has the advantage that the commonality is strong, detects when effectively reducing tool manufacturing cost and being convenient for produce and uses.

In the description of the present invention, it is to be understood that the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, and do not indicate or imply that the product or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or may be connected through the use of two elements or the interaction of two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

Claims (10)

1. The universal slide way detection jig is characterized by comprising a fixed main body (1), wherein a pushing module (2) is slidably mounted in the middle of the fixed main body (1); the pushing module (2) comprises a pushing block (3) and a pushing screw rod (4) connected with the pushing block (3), the pushing block (3) is an isosceles trapezoid body, and the pushing block (3) comprises a first pushing inclined plane (31) and a second pushing inclined plane (32);

a first sliding block (5) and a second sliding block (6) are respectively arranged on two opposite sides of the fixed main body (1), a first sliding inclined surface (51) matched with the first pushing inclined surface (31) is arranged on one side, close to the pushing block (3), of the first sliding block (5), and a second sliding inclined surface (61) matched with the second pushing inclined surface (32) is arranged on one side, close to the pushing block (3), of the second sliding block (6);

the pushing block (3) is connected with the first sliding block (5) and the second sliding block (6) in a sliding mode, and the sliding directions of the first sliding block (5) and the second sliding block (6) are opposite.

2. The universal slide way detection jig is characterized in that the fixing main body (1) is a quadrangular frame body, a sliding groove (11) used for pushing the block (3) to slide is formed in the middle of the fixing main body (1), and the sliding groove (11) is an isosceles trapezoid body;

the fixed main body (1) is provided with first installation trompil (12) and second installation trompil (13) respectively in the relative both sides, first installation trompil (12), second installation trompil (13) all communicate with sliding tray (11), first slider (5) slidable mounting is in first installation trompil (12), second slider (6) slidable mounting is in second installation trompil (13).

3. The universal slideway detection jig according to claim 2, wherein the first sliding block (5) comprises a first detection contact end (52) and a first mounting end (53) connected with the first detection contact end (52), and the first mounting end (53) is slidably mounted in the first mounting opening (12);

the first detection contact end (52) is a cuboid, the first installation end (53) is a right-angle trapezoid body, and the first sliding inclined surface (51) is located on the first installation end (53).

4. The universal slide way detection jig is characterized in that the second sliding block (6) comprises a second detection contact end (62) and a second mounting end (63) connected with the second detection contact end (62), and the second mounting end (63) is slidably mounted in the second mounting hole (13);

the second detection contact end (62) is a cuboid, the second mounting end (63) is a right-angle trapezoid, and the second sliding inclined surface (61) is located on the second mounting end (63).

5. The universal slideway detection jig according to claim 4, wherein the fixing main body (1) is provided with a first guiding and limiting unit (7) for guiding the sliding direction of the first sliding block (5) and a second guiding and limiting unit (8) for guiding the sliding direction of the second sliding block (6).

6. The universal slide way detection jig is characterized in that the first guide limiting unit (7) comprises a first fixing screw (71), a first guide limiting hole (521) matched with the first fixing screw (71) is formed in the sliding direction of the first detection contact end (52), the first guide limiting hole (521) is a circular hole, and the diameter of the first guide limiting hole (521) is the same as that of the head of the first fixing screw (71);

the second guide limiting unit (8) comprises a second fixing screw (81), a second guide limiting hole (621) matched with the second fixing screw (81) is formed in the sliding direction of the second detection contact end (62), the second guide limiting hole (621) is a circular hole, and the diameter of the second guide limiting hole (621) is the same as the diameter of the head of the second fixing screw (81).

7. The universal slide way detection jig is characterized in that the number of the first fixing screws (71) and the number of the first guide limiting holes (521) are two, and the two first guide limiting holes (521) are respectively positioned at two ends of the first detection contact end (52) parallel to the sliding direction of the pushing block (3);

the number of the second fixing screws (81) and the number of the second guide limiting holes (621) are two, and the two second guide limiting holes (621) are respectively located at two ends, parallel to the sliding direction of the pushing block (3), of the second detection contact end (62).

8. The universal slide way detection jig is characterized in that a first return spring (72) is sleeved outside the first fixing screw (71), and a second return spring (82) is sleeved outside the second fixing screw (81).

9. The universal slide way detection jig is characterized in that a sliding guide pin (14) is arranged in the sliding groove (11), and a sliding guide mounting hole (33) matched with the sliding guide pin (14) is formed in the pushing direction of the pushing block (3).

10. The universal slide way detection jig is characterized in that the fixing body (1) is provided with scale marks in the sliding direction of the pushing block (3).

Images